Bid Set - LSB Boiler Addition.pdf

Schedule of Drawings A0.1 Cover Sheet A0.2 Appendix B M0.1 Mechanical Schedules M1.0 Mechanical Demo Plan M1.1 Mechanical Plan M1.2 Mechanical Plan M1.3 Mechanical Plan M2.1 Mechanical Details M3.1 Mechanical Controls E0.1 Electrical Schedules E1.1 Electrical Plan E1.2 Electrical Plan E1.3 Electrical Plan E3.1 Electrical Details E3.2 Electrical Details

Abbrevations and References NFPA - National Fire Protection Agency SMANCA - Sheet Metal & Air Conditioning Contractor's National Association NCFG - North Carolina Fuel Gas Code NCMC - North Carolina Mechanical Code NEC - National Electric Code NEMA - National Electrical Manufacturers Association ANSI - American National Standards Institute UL - Underwriters Laboratory

AFF - Above Finished Floor AFG - Above Finished Grade AFUE - Annual Fuel Utilization Effiency APPROX - Approximate ALUM - Aluminum BFF - Below Finished Floor BFG - Below Finished Grade BHP - Brake Horse Power CAP. - Capacity CFM - Cubic Feet per Minute CONN. - Connection COORD. - Coordinate CU. FT. - Cubic Foot DB - Dry Bulb DISTR. - Distribution DWG. - Drawing DX - Direct Expansion ETR - Existing to remain ESP - External Static Pressure EQUIV. - Equivalent EXH. - Exhaust FPM - Feet per Minute GALV. - Galvanized Hp - Horse Power KW - Kilowatt MCA - Minimum Circuit Ampacity MIN. - Minimum NC - Normally Closed NO - Normally Open NPSH - Net Positive Suction Head O.A. - Outside Air Occup. - Occupancy PSI - Pounds per Square Inch QTY. Quantity RECT. - Rectangular RPM - Revolutions per Minute SCH. - Schedule SEER - Seasonal Energy Efficiency Rating SENS. - Sensible SPEC. - Specification Sq ft. - Square Feet TYP. - Typical Installation / Materials UON - Unless Otherwise Noted VAV - Variable Air Volume VRV - Variable Refrigerant Volume WB - Wet Bulb

Gaston College

Dallas, North Carolina Lena Sue Beam Boiler Addition

Site Address: 201 Highway 321 South. Dallas NC 28034 General Requirements & Notes:

1. All work shall comply with the North Carolina Building Code

2. All mechanical work shall be done by trained and qualified technicians

3. All electrical work shall be done by trained and qualified electricians

4. Install mechanical equipment in accordance with manufacturers recommendations

5. Drawings and documents are diagrammatic and are intended to convey scope and general arrangements unless otherwise indicated

6. Contractor is responsible for surveying site conditions and determining the best route for equipment, wiring, ducting, piping and conduits

7. Contractor will notify engineer immediately if an issue arises that cannot be immediately resolved

8. Install equipment to allow manufacturers recommended clearances

9. Provide a 48 hour notice before any power or gas shutdown

10. Seal Penetrations through floors or fire walls to maintain the integrity of the fire and acoustic ratings of the walls and floors.

11. All trades shall coordinate their work with the other disciplines to maintain schedule integrity.

12. Submittals drawings and paperwork will be approved by engineer before equipment and materials will be ordered

13. Not all abbreviations may apply to this project.

Design Complies with the 2018 North Carolina Building Code

Scope of Work This project involves the removal of steam equipment to heat a college building and the addition of boilers to heat the building. New controls, pumps and ancillary equipment will be installed. Air purifiers are to be installed on two air handlers.

Alternate 1:

Replace JACE Controller Replace one shot chemical feeder

Location Map

G0.1

COPYRIGHT

Project No:

01-2026005

Scale: N/A

Date: 03-24-2026

Title: Cover Sheet

L e n a

S u e

B a m

B o i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y o u t h

D a l l a s

N o r t h

C r o l i n a

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is L ak e

Pa rk w ay

, S ui te C

6-

C ha rl ot te

, N or th C ar ol in a

Fi rm L ic en se

C -3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written permission.

07/08/2026

G0.2

COPYRIGHT

Project No:

01-2026005

Scale: N/A

Date: 03-24-2026

Title: Appendix B

L e a m

B o i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y u t h

D a l l a s

N o r t h

C a r o l i n a

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is L ak e

Pa rk w ay

, S ui te C

6-

C ha rl ot te

, N or th C ar ol in a

Fi rm L ic en se

C -3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written

07/09/2026

Rect. Diffuser, 4

Way Distr.

Rect. Diffuser, 3

Way Distr.

Rect. Diffuser, 2

Way Distr.

Rect. Diffuser, 1

Way Distr.

Round Diffuser

Return Air Grille

Exhaust Grille or

Exhaust Fan

Register and Grille, adjustable

Register, Diffuser &

Grille, Call out

Neck Size

Air Volume Flow

Spec. Type

10 x 12

Rect. Rigid Duct

10 Dia

Round Rigid Duct

Rigid Duct Transition

10 x 12

Lined Rect. Rigid Duct

Rect. Corner

Diffuser, 2 Way

Distr.

Flexible Duct

Vertical Duct Conn.

Normal to viewing plane

Stand. Rect. Take-off w. Vol. Damper

Rect. to Round Take-off

Round. to Round Take-off

90 deg. Turn Elbow w.

Turning Vanes

Smooth Turn Elbow

Raduis = 1.5 Duct Depth

Manual Damper

S D

Smoke Damper

F D

Fire Damper

D D

Duct Smoke Detector

T,1

Thermostat

Spec. Type

TS,1

Temperature Sensor

Spec. Type

PS,1

Pressure Sensor

Spec. Type

HS,1

Humidity Sensor

Spec. Type

BK,1

Boiler Kill Switch

Spec. Type

DH

Duct Heater

VAV,

A1

Variable Air Volume

Box, Static or Fan

Spec. Type

FS,1

Flow Switch

Spec. Type

Gate Valve

Ball Valve

Butterfly Valve

Check Valve

Actuated Valve

Pressure Reducer

Pressure Safety

Valve (Relief)

Strainer

Line Reducer

HWS

Hot Water Supply

HWR

Hot Water Return

CHWS

Chilled Water Supply

CHWR

Chilled Water Return

COND

Condensate Line

GAS

Gas Supply Line

Angle Valve

Three Way Valve

Connect to existing at this point

Remove to this point

Key Note Icon

A , 10" x 12"

400 CFM 1

General Installation Requirements

1. Drawings are diagrammatic and are intended to convey scope and general arrangements unless otherwise indicated. They do not show every rise, fitting, offset and detail. It is the contractor's responsibility to read and understand the scope and intent of the drawings and specifications and deliver a complete and operational system that performs to the specifications and documents provided.

2. All mechanical permits and inspection fees shall be obtained and paid by the mechanical contractor.

3. Contractor is responsible for materials and installing the work in accordance with all applicable local, state and national codes.

4. Do not scale drawing for measurements.

5. It is the contractor's responsibility to verfiy duct and pipe paths are free of obstruction and reroute as necessary should an obstruction occur.

6. It is the contractor's responsibility to coordinate with the gas and power company to arrange and facilitate shutdown of utilities as necessary to integrate new system.

7. It is the contractor responsibility to survey existing conditions and make adjustments to duct size, route and configurations to deliver the required air to the system zones.

8. Install all equipment using the manufacturer's recommended installation procedures.

9. It is the contractor's responsibility to notify and coordinate with building owner when work will cause any interruption in services to building whether utilities, path obstruction, etc..

10. The contractor will provide protection of materials, tools and equipment during the construction phase including protective covers, skids, plugs, caps, boxes and temporary fences.

11. All equipment shall be U.L. Listed.

12. All cutting and patching of walls and floors for mechanical equipment shall be the responsibility of the mechanical contractor.

13. It is the contractor's responsibility to field verify all dimensions and locations of existing and new equipment and the utilities supplying said equipment including but not limited to; hot water piping, chilled water piping, natural gas lines, control wires, data cables and electrical conduits.

14. Fire Alarm Control Panel (FACP) is Simplex model.

Mechanical Installation Requirements

1. Furnish all labor, material and equipment required for the complete installation and operation of all systems in this section of work in accordance with recommended practice and all applicable codes.

2. Mechanical contractor shall guarantee all work and materials for one year, effective the day the project is accepted by the owner. Refrigerant compressors shall be guaranteed for five years.

3. Airtight seals shall be field applied mastic complying with UL 181 A-M or mastic tape complying with UL 181 A-P

4. Provide and install permanent tags in a location that is readily visible on all installed equipment that includes all pertinent operating information including; make, model no., capacity, voltage, ampacity, heating data, cooling data. See specs for details.

5. Contractor will locate equipment as such so that maintenance personnel will have access to panels, control boards and valves.

6. Contractor will perform a test and balance of the system in accordance with the 2018 NCECC section 503.2.9. Test shall result in +5% to -5% of design flow.

7. Contractor will follow the latest SMANCA HVAC Duct Construction Standards for duct sheet thickness and fastening methods.

8. All control wire shall be provided by Mechanical Contractor.

9. All pipe supports shall conform to ANSI/MSS SP - 69.

10. Contractor to install manual air bleeds at the expansion tank high point and the water feed high point.

11. Contractor to provide temperature gauges with snubbed connectors on the boiler supply and return piping.

12. Contractor to provide 75 psi pressure temperature safety valve on supply pipe or boilers itself.

See manufacturer's recommendations.

13. Insulate and PVC jacket new piping with a minimum of 1

" fibrous insulation for pipes smaller than or equal to 1

" diameter and minimum of 2" fibrous insulation for pipes greater than 1 diameter.

14. Contractor will provide a functioning pressure test 200% max operating pressure by gradually raising pressure with boiler isolated from system and noting pressure rises per gauges.

15. Contractor is to inspect the make-up water backflow preventer for compliance to the RPZ type. If backflow preventer is the RpZ type then it is to remain. If not, contractor will replace.

16. Contractor to submit for Dept of Labor inspections for boiler installation final.

17. Contractor to submit for Gaston County Inspections for project.

Accessories:

1. Install on 6" concrete pad

2. 75 PSIG pressure relief valve

3. Variable Prime boiler pump control

Pump Schedule

Plan ID Service Manufacturer

Model #

Water Flow

(GPM)

Head

(ft H2O)

Eff., %

Motor

Hp

Motor

Rpm

Voltage/

Phase

Water Pipe Size &

Schedule

Triple Duty

Valve

Accessories Comments

HWP-1 Hot Water - L1 Bell & Gossett Series 1510 32 60 44 2 1750 460/ 3

"D, 2"S,sch 40 N 1 1

HWP-2 Hot Water - L1 Bell & Gossett Series 1510 32 60 44 2 1750 460/ 3

"D, 2"S,sch 40 N 1 1

BP-1

Boiler Primary

Grundfos 25709 VL 96 23 66 1 1760 115/ 1

"D, 2

"S,sch 40 N

1, 2 2, 3, 4

BP-2

Boiler Primary

Grundfos 25709 VL 96 23 66 1 1760 115/ 1

"D, 2

"S,sch 40 N

1, 2 2, 3, 4

Comments:

1. Follow manufacturers instructions

2. Support unit using ANSI/MSS SP-69

3. Comparable manufactuers are Xylem, Taco and Amtrol

Air-Dirt Separator Schedule

Plan

ID

Service Manufacturer Model #

Water

Flow

(GPM)

Head

Loss

(ft H2O)

Volume

(Gallons)

Weight

(lbs)

Water Pipe

Size &

Schedule

Accessories Comments

AS Hot Water

Spirotherm

VHT250FA 96 1.8 3.5 238

2 1/2", Flanged 1, 2, 3 1, 2, 3

Accessories:

1. Air and Dirt Separator

2. Ball valve on drain line

3. Automatic air vent

Comments:

1. Existing Pump

2. Install inline with service pipe

3. Comparable manufacturers are Grundfos, Taco and Bell and Gossett

4. H2O

Accessories:

1. Differential Pressure Gauges

2. Variable frequency drive capable

Accessories:

1. Adjustable legs

Comments:

1. Comparable manufacturers are Chemworld, Cannonwater, Neptune and

Axiom

Chemical Feeder Schedule

Plan ID Manufacturer Model #

Description

Gallons

Max.

Pressure

Max Temp.

Accessories Comments

CF-1 Cannonwater Vector FA-1000

Bypass Feeder and buttress threaded cap

5 300 PSI 200 °F 1 1

GAS PIPING NOTES

1. Minimum gas piping size shall be

2. Gas piping shall be installed to the requirements of the North Carolina fuel gas code and NFPA Standard No. 54. All inside piping to be supported by clevis hangers with galvanized rod with a maximum of 8' on center.

3. Gas piping shall be tested in accordance with the procedures noted in

NFPA Standard No. 54. All tests required by the local gas inspection department or gas company shall also be provided.

4. Paint all gas piping with two coats of yellow enamel and stencil "Gas" on pipe at 5' -0" centers.

5. Gas valves shall be a min. 125 psi rated, non-lubricated plug type with bronze body and bronze plug.

6. Provide unions, flanges, coupling and fittings at connection to all valves and equipment. Do not use direct welded or threaded connection to valves or equipment.

7. Provide non-conducting dielectric unions whenever connecting dissimilar metals.

8. Gas piping routed on the roof shall have pipe supported provided in accordance with the 2018 NC Fuel Gas Code chapter 4

Gas Load Requirements:

Item

Description Qty

Input

MBH

Total

MBH

B-1

New Condensing Boiler

1 1000 1000

B-2

New Condensing Boiler

1 1000 1000

TOTAL BUILDING LOAD MBH = 2000

GAS PIPE SIZING CALCULATIONS

■ NCFGC Table 402.4(5) - 2.0 PSIG W/1.0 PSIG pressure drop

Total Gas Input (new equipment): 2000

■ High Pressure: P1=2.0 PSIG P2=1.0 PSIG

■ Length: 35'-0" LN/FT

■ Fittings Factor: 1.25 (25%)

■ Total Equivalent Length of 43 ft

■ Natural Gas Steel: 1" Schedule 40 Metallic Pipe

Boiler Schedule

Plan ID Service Manufacturer Series Model #

Max Gas

Input

(MBH)

Heating

Output

(MBH)

Total

Eff., %

Fuel

Type

Min. Gas

Pressure, (in w.c.)

Turn

Down

Gas Line

Size &

Schedule

Water Pipe

Size &

Schedule

EWT/

LWT

Design

Flow rate

(gpm)

Pressure

Drop, ft

H2O

Flue Size, in

Flue

Material

Unit Dimensions

Voltage / Phase

/ Amps

Weight

Accessories Comments

B -1

Building (HW)

Laars NeoTherm XTR 999 999 962 96.3% Nat. Gas 3.5 10:1

", NPT 2 1/2", sch 40 160°/180° 96 15 6"Ø AL29-4C 58" x 27" x 53"

120V/ 1ɸ/ 5.3 A

1, 2, 3 1, 2

B -2

Buildling (HW)

Laars NeoTherm XTR 999 999 962 96.3% Nat. Gas 3.5 10:1

", NPT 2 1/2", sch 40 160°/180° 96 15 6"Ø AL29-4C 58" x 27" x 53"

120V/ 1ɸ/ 5.3 A

1, 2, 3 1, 2

Comments:

1. Install on new concrete pad

2. ASME (CSD-1) Compliant

3. Equivalent manufacturers are Laars, Lochinvar and Raypack

Alternate 1:

Comments:

1. Follow manufacturers instructions

2. Device to be third party listed

3. Comparable Manufacturers are Phenomenal Aire; GPS -DM48-AC & iWAVE-C

4. Differential Pressure Switch for on/off control

Ion Generating Air Purifiers

Plan ID Model

Application

Flow

Capacity

(CFM)

Pressure

Drop (WC)

Temp

Range (F)

Humidity

Range

Voltage

Power Size

Weight

IP -1

AtmosAir; 508FC

Supply Duct 0 - 15,000 ~0.01 -20 -140 0 - 99% 120 V 28 Watts 11" x 28" x 9.5 23 lbs

Accessories:

1. Niagara 4 license, version 4.15 or newer

2. Minimum I/O 60 points

Comments:

1. Open Ended JACE controller

2. Listed by BAC/net Testing Lab

3. Tridium Compatible

4. Comparable manufacturers are ABB, Honeywell and Vykon

Direct Digital Controller Schedule

Plan ID Manufacturer Model #

Description

I/O Points

Voltage Memory

Accessories Comments

DDC1 LYNXSPRING PC-9000

JENEsys PC9000 Controller

60 115 1 GB

1, 2 1, 2, 3

Alternate 1:

M0.1

COPYRIGHT

Project No:

01-2026005

Scale: N/A

Date: 03-24-2026

Title: Mechanical

Schedules

L e n a

S u e

B e m i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y

S o u t h

D a l l a s

N o r t h

C a r o l i n a

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is P ar kw ay , S ui te

C 6-

C ha rl ot te , N or th

C ar ol in a

Fi rm

L ic en se

C

-3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written

07/09/2026

HW1

AS1

EB1

HWP1

HWP2

ET1

CRU

HX-1

UH1

CF1

M a k e u p

A s s y

Steam Ladder

2" V

3"

3"

4"

3"

3"

3"

3"

2" V

1"

1"

" HWR down

" HWS up

EBP

DDC

Controller

M1.0

COPYRIGHT

Project No:

01-2026005

Scale:

" = 1' - 0"

Date: 03-24-2026

Title: Mechanical

Demo Plan

L e n a

S u e

B e i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y

S o u t h

D a l l a s

N o r t h

C a r o l i n a

" HWR down

HW1

AS1

EB1

HWP1

B1

HWP2

B2

ET1

UH1

CF1

M a k e u p

A s s y

BP-1

BP-2

SF-1

H C

C C

B l a n k

M o d u l e

F i l t e r

O.A. Relief R.A.

CHWP-1

AHU-1 (13,500 CFM)

ET1

EBP

" HWS up

" 2

1"

1"

6" V

6" V

6" Air intakes

New 2# Nat

Gas Meter

N a t

G a s

L i n e

IP-1

DDC 1

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is P ar kw ay , S ui te

C 6-

C ha rl ot te , N or th

C ar ol in a

Fi rm

L ic en se

C

-3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written permission.

Mechanical Demo Plan Scale: 12" = 1' - 0"M1.0

07/09/2026

Key Plan

Mechanical Demo Notes

1. Demolish the condensate recovery unit and associated piping and vents.

2. Demolish condensate reclamation lines back to the boiler room wall. Cut and cap line.

3. Demolish steam piping, ladder and valves back to the boiler room wall. Cut and cap line. Return control valves to Gaston College facilities.

4. Demolish heat exchanger and associated piping.

5. Demolish air separator.

6. Demolish piping per plan to make adjustments for new piping plan.

7. Existing hot water heater (HW1) to remain

8. Existing building heating loop pumps to remain.

9. Existing electric boiler (EB1) and pump (EBP) to remain.

10. Existing unit heater (UH1) to remain.

11. Alternate 1: Demolish one shot chemical feeder.

12. Alternate 1: Replace DDC Controller.

" HWR down

HW1

AS1

EB1

HWP1

B1

HWP2

B2

ET1

UH1

CF1

M a k e u p

A s s y

BP-1

BP-2

ET1

EBP

1"

1"

6" V

6" V

6" Air intakes

New 2# Nat

Gas Meter

N a t

G a s

L i n e

DDC 1

M1.1

COPYRIGHT

Project No:

01-2026005

Scale:

" = 1' - 0"

Date: 03-24-2026

Title: Mechanical Plan

L e n a

S u e

B e i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y

S o u t h

D a l l a s

N o r t h

C a r o l i n a

" HWR down

HW1

AS1

EB1

HWP1

B1

HWP2

B2

ET1

UH1

CF1

M a k e u p

A s s y

BP-1

BP-2

SF-1

H C

C C

B l a n k

M o d u l e

F i l t e r

O.A. Relief R.A.

CHWP-1

AHU-1 (13,500 CFM)

ET1

EBP

" 2

1"

1"

6" V

6" V

6" Air intakes

New 2# Nat

Gas Meter

N a t

G a s

L i n e

IP-1

DDC 1

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is P ar kw ay , S ui te

C 6-

C ha rl ot te , N or th

C ar ol in a

Fi rm

L ic en se

C

-3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written permission.

Mechanical Plan Scale: 12" = 1' - 0"M1.1

07/09/2026

Key Plan

Mechanical Installation Notes

1. Install (2) new boilers on concrete pads. Route flue vents and outside air intakes to outside boiler room. Pest Screens are to be installed at the termination of the ducts Flash and seal all penetrations.

2. Install new circulating pumps for boilers. Pumps shall be VFD controlled and boiler logic sequenced.

3. Install new piping to connect boilers and equipment.

4. Install new air and dirt separator in lieu of the air separator. Adjust piping to accommodate change

5. Run new natural gas lines from new 2 psi meter to boilers.

6. Alternate 1: Add new one shot chemical feeder.

7. Alternate 1: Replace DDC Controller.

SF-1

H C

C C

B l a n k

M o d u l e

F i l t e r

O.A. Relief R.A.

CHWP-1

AHU-1 (13,500 CFM)

IP-1

M1.2

COPYRIGHT

Project No:

01-2026005

Scale:

" = 1' - 0"

Date: 03-24-2026

Title: Mechanical Plan

L e n a

S u e

B e i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y

S o u t h

D a l l a s

N o r t h

C a r o l i n a

" HWR down

HW1

AS1

EB1

HWP1

B1

HWP2

B2

ET1

UH1

CF1

M a k e u p

A s s y

BP-1

BP-2

SF-1

H C

C C

B l a n k

M o d u l e

F i l t e r

O.A. Relief R.A.

CHWP-1

AHU-1 (13,500 CFM)

ET1

EBP

" 2

1"

1"

6" V

6" V

6" Air intakes

New 2# Nat

Gas Meter

N a t

G a s

L i n e

IP-1

DDC 1

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is P ar kw ay , S ui te

C 6-

C ha rl ot te , N or th

C ar ol in a

Fi rm

L ic en se

C

-3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written permission.

Mechanical Plan Scale: 12" = 1' - 0"M1.2

07/09/2026

Key Plan

Mechanical Installation Notes

1. Install Ion air purifying system in supply duct. Follow manufacturer's instructions. Seal duct airtight with mastic putty.

2. Interlock air purifier into AHU.

C

C C

B l a n k

M o d u l e

F i l t e r

O.A.ReliefR.A.

AHU-2 (15,000 CFM)

IP-1

M1.3

COPYRIGHT

Project No:

01-2026005

Scale:

" = 1' - 0"

Date: 03-24-2026

Title: Mechanical Plan

L e a m

B o i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y u t h

D a l l a s

N o r r o l i n a

SF-1

H C

C C

B l a n k

M o d u l e

F i l t e r

O.A.ReliefR.A.

AHU-2 (15,000 CFM)

IP-1

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is P ar kw ay , S ui te

C 6-

C ha rl ot te , N or th

C ar ol in a

Fi rm

L ic en se

C

-3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written permission.

Mechanical Plan Scale: 12" = 1' - 0"M1.3

07/09/2026

Key Plan

Mechanical Installation Notes

1. Install Ion air purifying system in supply duct. Follow manufacturer's instructions.

Seal duct airtight with mastic putty.

2. Interlock air purifier into AHU.

Boiler drain w/ neutralizer Scale: N/A

M2.1

M2.1

M2.1

M2.1

M2.1

Non-rated pipe penetration Scale: N/A

M2.1

Welding detail Scale: N/A

M2.1

M2.1

Non-Fire rated wall

Ferrous Pipe or tube

Max. 1-1/2" Fiberglass insulation with Min. 4 pcf density mineral wool backing

Insulating semi-solid foam sealant with a ASTM C518, K-factor of .26 per inch or better and a ASTM 1662 Apparent core density of 1.01 pcf

60 deg

All carbon steel pipe welds to be continous circumference V welds with 2mm opening and ferrous metal baking ring. Conform to ASME B31.1

Ferrous Metal Hydronic Pipe

V Weld

Backing ring

SECTION A - A

FRONT VIEW

A A

UL/cUL SYSTEM No. CAJ1226

METAL PIPE THROUGH A SLEEVE IN CONCRETE FLOOR/WALL OR BLOCK WALL

F RATING = 3-HR

T RATING = 0-HR

L RATING AT AMBIENT = LESS THAN 1 CFM/SQ. FT.

L RATING AT 400° F = 4 CFM/SQ. FT.

1. CONCRETE FLOOR OR BLOCK ASSEMBLY(3-HR FIRE RATING):

1.1. LIGHTWEIGHT OR NORMAL WEIGHT CONCRETE FLOOR OR WALL (MIN. 4-1/2" THICK.)

1.2. ANY UL/ULC CLASSIFIED CONCRETE BLOCK WALL.

2. OPTIONAL: MAXIMUM 32" NOMINAL DIAMETER STEEL PIPE SLEEVE (SCH. 40 OR HEAVIER)

3. PENETRATING ITEM TO BE ONE THE THE FOLLOWING:

3.1. MAX. 30" NOMINAL DIAMETER STEEL PIPE (SCH. 10 OR HEAVIER).

3.2. MAX. 30" NOMINAL DIAMETER CAST IRON PIPE.

3.3. MAX. 6" NOMINAL DIAMETER COPPER PIPE.

3.4. MAX. 6" NOMINAL DIAMETER STEEL CONDUIT.

3.5. MAX. 4" NOMINAL DIAMETER EMT.

4. MINIMUM 4" THICKNESS MINERAL WOOL (MIN. 4 PCF DENSITY) TIGHTLY PACKED.

5. MINIMUM

" DEPTH HILTI FS-ONE INTUMESCENT FIRESTOP SEALANT

6. MINIMUM

" CROWN HILTI FS-ONE INTUMESCENT FIRESTOP SEALANT APPLIED AT POINT OF

CONTACT.

NOTES:

1. MAXIMUM DIAMETER OF OPENING = 32"

2. ANNULAR SPACE = MINIMUM 0", MAXIMUM 1 -

3. MINIMUM

" DEPTH HILTI FS - ONE INTUMESCENT FIRESTOP SEALANT IS REQUIRED ON BOTH

SIDE OF A WALL ASSEMBLY.

Rated pipe penetration Scale: N/A

M2.1

Indoor pipe support details Scale: N/A

M2.1

M2.1

Gas Meter Takeoff Scale: N/A

To System

From System

Isolation valve

Triple Duty Valve

Vertical Inline Pump. Install per manufacturer's instructions

Differential

Pressure Gauge

Drain: Terminate near floor drain

Strainer

Reducer

1/4" O.D. copper tubing with compression fittings

Reducer

Support piping and pump per

NCMC. Anchor to load bearing structure. Use vibration isolators within 3 feet of pump.

10 2.5

3.0

2.0

1.5

3.0

4.0

1.8

2.4

1.5

1.4

15 10 1.5 1.2

50 10 3.0 2.1

80 2.7

32 10 2.5 1.7

3.0

2.0

2.5

2.5

2.0

2.0

3.0

0.6

0.9

1.35

1.2

1.05

1.5

2.0

0.85

0.75

0.7

M10 EXPANSION ANCHOR WITH WORKING

LOAD 2 kN TENSION TYP 'DYNABOLT' OR

EQUIVALENT

"UNISTRUT" SADDLE

CLIP

"UNISTRUT UNI-CUSHION P2600" TO

ISOLATE PIPE FROM METAL

STUDWORK AND CLIPS TO PREVENT

ELECTROLYTIC CORROSION

INSTALL INSULATION AROUND

BRACKET AS SHOWN

M10 NUT "UNISTRUT P1008" (WITH SPRING)

METAL CHANNEL

"UNISTRUT P2000"

M10

"UNIROD"

"ABEY" PIPE BRACKET

"UNISTRUT UNI-CUSHION P2600"

"ABEY" PIPE CLIP

PROPRIETARY FERRULE

DN20 TO DN65

NOTE

1. PROPRIETARY FERRULE NOT REQUIRED FOR PRE-INSULATED

PIPING. FOR DN15 PIPES USE ABEY NOOSE HANGING CLIP.

* HANGER TO BE INSULATED (EXCEPTION: CHILLED WATER PIPING.)

SUPPORT VERTICAL PIPEWORK AT EVERY FLOOR.

BASED ON TABLE 5.2 AS 3500.1.2

NON-INSULATED PIPING

INSULATED PIPING

(EXCEPT CHILLED WATER)

TYPICAL SADDLE CLIP MOUNTING

HYDRONIC PIPING

PIPE SIZE ROD DIA

MAX SUPPORT SPACING (m)

(DN) (mm) COPPER* STEEL/

IRON

uPVC PLASTIC

HOR VER

3.0

3.0

3.0

3.0

3.0

3.0

TYPICAL PIPE SUPPORT DETAILS

In Line Pump Detail Scale: N/A

Duct penetration Scale: N/A

Boiler support pad Scale: N/A

Wall Penetration locations Scale: N/A

Finished Floor

Excavate, level and pour new concrete slab

Use #3 rebar spaced 18" evenly apart and from edges of pad and wire mesh, typ.

Raise slab 5" above grade with a 1" chamfer

18"

10"

Install a 8' x 6' concrete equipment slab. 5" below grade and 5 " above grade.

Primary Drain Pan

Clean-out tap

Drain line shall be the same as drain pan nipple. (min. 1")

Slope line down per code

Seal depth is equal fan pressure plus

" water column

Condensate lines are to constructed of be schedule 40 PVC

To floor drain thru neutralizer

Condensate neutralization kit

Axiom Industries, Model # NC-1 or equivalent

Chemical Feeder Scale: N/A

Standard masonary non-Fire rated wall

Max. 1-1/2" Fiberglass insulation with Min. 4 pcf density mineral wool backing

Insulating semi-solid foam sealant with a ASTM C518, K-factor of .26 per inch or better and a ASTM 1662 Apparent core density of 1.01 pcf

Route outside air intakes through existing vent penetrations. Enlarge as necessary

Drill new penetrations for exhaust duct. Rout between windows.

Support per MSS SP- 69

Route vent stack to above roof. Distance per

NC Building code.

Gas Meter

Contractor to tee off and route gas pipe to boilers

Pipe supports

Pipe supports

Natural gas meter. See plan for location

New Incoming service from Piedmont gas header

M2.1

COPYRIGHT

Project No:

01-2026005

Scale: N/A

Date: 03-24-2026

Title: Mechanical Details

L e a m

B o i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y u t h

D a l l a s

N o r r o l i n a

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is P ar kw ay , S ui te

C 6-

C ha rl ot te , N or th

C ar ol in a

Fi rm

L ic en se

C

-3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written permission.

07/09/2026

AutoCAD SHX Text

PIPE HANGER RODS AND SUPPORT SPACING

AutoCAD SHX Text

FROM SYSTEM

AutoCAD SHX Text

TO PUMPS

AutoCAD SHX Text

CHEMICAL POT FEEDER

AutoCAD SHX Text

DRAIN VALVE

AutoCAD SHX Text 34"

AutoCAD SHX Text

34" SAMPLE LINE

AutoCAD SHX Text

NOTE: PROVIDE CHEMICAL FEED SYSTEM FOR HEATING SYSTEMS.

AutoCAD SHX Text 34"

Boilers Controls Diagram Scale: N/A

M3.1

Boiler (B-1)

Low

FlowCut-off

Control

MOD

BUS

Pressure/

Temperature

Safety Valve

" Gas Line with dirt leg

" Drain line

1" Drain line

From: Bldg Potable Water

Supply

Air & Dirt

Separator

Hot Water Supply

Hot Water Return

HWP-2

Boiler (B-2)

Low Flow

Cut-off

Control

MOD

BUS

Pressure/

Temperature

Safety Valve

" Drain line

Temperature

Gauge with snubbed connector

T

T

VFD

BP-1

Temperature

Gauge with snubbed connector

T

T

VFD

BP-2

" Make up Water Supply

Hot Water Supply

" Gas Line with dirt leg

Building Heat Distrubtion System:

Loop 1 (AHUs and VAV's)

1 2

H o t

W a t e r

R e t u r t

W a t e r

R e t u r t

W a t e r

S u p p l y

Boilers P and ID Scale: N/A

M3.1

HWP-1

Expansion Tank

" Hot Water Return

T

MODBUS

CONTROLLER

LOW WATER

CUT-OFF

CONTROLLER

MODULATING

BURNER

BOILER (B1 & B2)

DIRECT DIGITAL

CONTROLLER

(BAS)

DI

T

BAC/net

Ethernet Module

DI DO AI AI AI DIDO

DI

PUMP

BP 1&2

HOA

VFD Controller

BOILER

EMERGENCY

SHUTOFF

TS

Hardware Points

Point Name

Software Points

A I A O D I D O A S D S Schedule Trend Alarm

Outside Air Temp

Boiler (B1&2) On/Off

Boiler (B1&2) Status

Pressure Sensor

Leaving Water Temp

Boiler Pump (1&2)

Pump Status

Bldg Temp Setpoint

Occupied Schedule

Return Water Temp.

Errors

Totals:

X

X

X

X

X

X

X

X

X

X

X

X

X

TOTAL HARWARE POINTS: 13

TOTAL SOFTWARE POINTS: 16

LEGEND:

AI = ANALOG INPUT

AO = ANALOG OUTPUT

DI = DIGITAL INPUT

DO = DIGITAL OUTPUT

AS = ANALOG SETPOINT

DS = DIGITAL SETPOINT

Boiler Room Sequence of Operations:

Main building is occupied 7 days a week 24 hrs a day.

Indoor Bldg Temp shall be supplied by the BAS.

Heating Mode:

When occupied (occupied mode shall 7 day programmable and initially set for 24 hours, 7 days a week) and, When outside air temperature is below 60 deg F and indoor bldg temp is below setpoint; HWP 1 will activate. BP-1 will activate.

When outside air temperature is below 60 deg F and pressure sensor has increased verifying flow then;

Boiler 1 will activate.

When boiler has been active for 30 minutes then;

Boiler 1 will operate per the following initial setback schedule by modulating the burner output: Outside air temp is under 60 deg F then leaving water temp shall be 140 deg F

Outside air temp is over or equal 45 deg F then leaving water temp shall be 145 deg F

Outside air temp is under 25 deg F then leaving water temp shall be 165 deg F

Outside air temp is under 0 deg F then leaving water temp shall be 180 deg F

System shall be capable to maintain up to 80 deg F in building under testing conditions.

Boiler 1 shall use internal controls to vary the flow turn down synchronized with boiler heat transfer turn down to maintain optimal heat transfer efficiency. Boiler 1 will also control the primary pump BP-1.

Boiler 2 shall become active when building demand requires additional heating capacity and shall duplicate Boiler 1 controls and sequences.

When there is enough heat in the supply loop; then HWP 1 will remain active and the boiler will switch in stand-by mode until water temp drops

10 degrees.

Boiler 1 and Boiler 2 shall rotate the lead/lag sequence with Boiler 2 becoming lead after a set time, Time shall be write-able initially set at 672 hours of operation.

If building set point cannot be maintained with HWP 1 active then HWP 2 shall activate for additional capacity.

HWP 2 will activate if HWP 1 fails and vice versa.

Boiler 1 and Boiler 2 shall rotate the lead/lag sequence with Boiler 2 becoming lead after a set time, Time shall be write-able initially set at 672 hours of operation.

HWP 1 and HWP 2 shall rotate the lead/lag sequence. Time shall be write-able initially set at 672 hours of operation.

Cooling Mode:

When outside air temperature is above 60 deg F and indoor bldg temp is above setpoint then;

Boiler 1 and Boiler 2 will switch to reheat mode.

When boilers deactivates then;

HWP 1 will remain on for reheat functionality.

HWP 2 will remain on for reheat functionality.

BP-1 will remain on for reheat functionality.

BP-2 will remain on for reheat functionality.

Faults:

When any fault condition is present the network screen will alarm until fault conditions are acknowledged and cleared.

When a low water fault occurs, then boiler will deactivate.

When emergency boiler cut-off switch is active, then boiler will deactivate.

When boiler reaches and overpressure condition, then boiler will deactivate.

Boiler will reactivate after all faults have been cleared.

T

OUTSIDE AIR

TEMPERATURE

SENSOR OVER

NETWORK

MAIN BUILDING

THERMOSTAT

SENSOR

TEMPERATURE

SENSOR

TO: FRONT END BAS

X

X

TS

AI

HWP - (1 & 2)

X

AODI

DOAO

AI

AO

Boiler (B1&2) Control

X X

X

X X

X

X

X

TO: HOT WATER SUPPLY

FROM: HOT WATER

RETURN

Boiler Start-up and Shutdown Procedures:

Boiler Shutdown:

1. Decrease building load as much as possible.

2. Turn boiler switch off. If control power from burner is used to support accessories, leave on until boiler system has cooled down.

3. Shut and lock manual gas valves as applicable.

4. Shut down the non-return valve and the back up valve. Lock them shut.

5. Allow the boiler feed pump to remain active. As the boiler cools down, the water level is reduced by demand or shrinkage. It is best to be aware of the boiler level at all times.

6. When boiler pressure has decreased to 5 to 10 psi on the pressure gauge, open the boiler manual vent valve on the top of the boiler.

This is to act as a sentinel against the increase in pressure and to prevent the boiler from going into a vacuum. Lock the valve open.

7. When boiler and water are below 120°F, shut off power to the unit and lock out the circuit breakers.

8. Open front and rear doors for observation of fireside surfaces.

9. Drain boiler down completely. Make sure the vent valve on the top of the boiler remains open.

10. Open and lock the float control low water cutoff drain valves. These will serve as additional vents.

11. Shut and lock the boiler feed valves.

Boiler Start-up:

1. Flush all the affected piping to clear the system of contaminents and sludge.

2. In a hot water heating system, the boiler and the entire system (other than the tank) must be full of water for satisfactory operation.

Water should be added to the system until the boiler pressure gauge registers normal system design operating pressure. To ensure that the system is full, water should come out of all air vents when opened.

3. Check wiring of all fuel valves. Verify that wiring is correct according to the factory supplied wiring diagram.

4. Leave all manual fuel valves closed. This includes manual shutoff valves supplied with the boiler and facility installed valves at the boiler site.

5. Perform all burner pre-startup checks according to the burner manufacturer's specifications.

6. Refer to the burner manufacturer's installation manual furnished with the boiler.

7. Turn boiler on and verify that fuel valves are closed during the burner pre-purge cycle. Turn boiler off and disconnect power.

8. Adjust burner according to the burner manufacturer's specifications. Target CO2 level is 13%

9. for optimum efficiency, but a range of 12.5 - 13.0% is acceptable.

10. Ensure the boiler controls are set-up properly with special attention to the low water cut-off controls.

11. Check Operating Control: Raise and lower operating control setting as required to start and stop burner.

12. Check High Limit Control: Jumper Operating Control Terminals. Allow Burner to operate until shut down by limit. Installation is not considered complete until this check has been made.

13. Check Low Water Cut-Off: Control with water level at normal waterline. Raise operating control setting to allow burner to operate.

Open boiler drain to allow water level to drop until burner operation is shut down by low water cutoff.

14. Ensure boiler is not allowed to operate below the minim permissible water level as indicated on the boiler.

15. Close boiler drain and refill to normal water line. Unless boiler is equipped with a manual reset low water cutoff, burner should automatically restart during fill. Reset operating control.

P t

W a t e r

S u p p l y

Hot Water Return

2"

2"

2"

2"

Low Flow

Cut-off

Control

MOD

BUS

Pressure/

Temperature

Safety Valve

" Drain line

Temperature

Gauge with snubbed connector

T

T

EBP

t

W a t e r

S u p p l y

Boiler (EB1) t

W a t e r

R e t u r n

Hot Water Supply t

W a t e r

S u p p l y

Unit Heater

(UH1)

Controls System Installation Requirements

1. Furnish all labor, material and equipment required for the complete installation and operation of all systems in this section of work in accordance with recommended practice and all applicable codes.

2. Existing building BAS controls are Philips Teletrol. The building is on BACnet MS/TP.

3. New controls system architecture shall be BACnet IP or BACnet MSTP.

4. Control wires shall be shielded or run within conduit or EMT.

5. Main building temperature reading shall be from the network.

6. Approved controls architecture is to be open ended controls.

7. Occupied schedule, temperature points, equipment activate and bldg temp set-points shall be write-able.

8. Controls contractor will submit architecture and sequence to the engineer and Gaston College project personnel for approval prior to installation.

9. Add an extension to the existing Teletrol controller or a new BACnet MS/TP controller.

10. Modify the existing boiler program in the Teletrol controller. If a new MS/TP controller was used create a program in it to run the boiler plant and pick up AHU UV lights. The UV lights should be connected to the controllers that control each AHU (Existing Distech) that way if the network fails the AHUs function correctly.

11. Pull the new points into the JACE.

12. Create alarms in the JACE and link the building programing.

13. Modify the graphics in the supervisor. Controls graphics will match existing graphics in format.

14. ]All Zones shall have temperature and humidity sensors with offset control without displays.

15. All AHUs shall have all VFDs integrated via BACnet for monitoring only. Start/Stop commands shall come from an I/O controller.

16. All actuators shall have a position feedback connected to the controller.

17. Chillers/Boilers shall only receive setpoint commands via BACnet. Start/Stop shall be via I/O controller.

18. Boilers shall have BACnet Gateways.

19. Chillers shall have BACnet communications.

20. AHUs Shall have Optimal Start implemented based on zone terminal load. Optimal Start shall have an Enable/Disable Point.

21. SAT Reset shall be implemented via an average terminal load. Reset shall have an Enable/Disable Point.

22. Duct Static Reset shall be implemented with a target setpoint of 90% (adj). Duct static may be adjusted from .8 to 1.5”wc at a max rate of .1”wc every 3 minutes. Reset shall have an Enable/Disable Point.

23. HW/CHW Reset shall be implemented based on Min and Max terminal loads. Loads shall be calculated from the zones not the AHUs unless they are constant volume. Reset shall have an Enable/Disable Point.

24. The building shall receive setpoints from the supervisor station. All setpoint changes shall be done via override. The Set, Emergency Override, and Emergency Auto shall be hidden from the end user.

25. All trends shall be done in the supervisor.

26. All Space Temperature and Humidity shall have alarms on them. The alarm blocks shall receive an alarm distance from setpoint value, a delay from schedule change value, and a delay time from the supervisor station.

These will all need to be integrated into each alarm.

27. All Actuators shall have an alarm that will use the delay time value and actuator deviation setpoint from the supervisor station.

28. No graphics shall reside on the JACE.

29. ALL ADMIN CREDENTIALS SHALL BE GIVEN TO THE BAS INTEGRATOR. This includes any controller level username and passwords. Winning contractor shall be given outside access via a Tosibox to their JACE only for the one year warranty.

30. Sensors shall be]: Analog Temperature Sensors- 10K Type II, All Non-Temperature Sensors- 0(2)-10 VDC, Actuators/Control Valves Brand- Belimo.

VAV Controls & Seq. of Ops.

Scale: N/AM3.1

X

X

X

X

X

M3.1

COPYRIGHT

Project No:

01-2026005

Scale: N/A

Date: 03-24-2026

Title: Mechanical Controls

L e n a

S u e

B e i l e r

A d d i t i o n

G a s t o n

C o l l e g e

H w y

S o u t h

D a l l a s

N o r t h

C a r o l i n a

A er oR aq

E ng in ee ri ng

In c

En gi ne er in g

Se rv ic es

D av is P ar kw ay , S ui te

C 6-

C ha rl ot te , N or th

C ar ol in a

Fi rm

L ic en se

C

-3

Ph on e:

Revisions

No. Date

Seal:

Note:

This drawing is the property of the firm, AeroRaq Engineering.

Reproduction in part or in whole is forbidden without written permission.

07/09/2026

AutoCAD SHX Text The UV lights should be connected to the

AutoCAD SHX Text ON A RISE IN SPACE TEMPERATURE, AS SENSED BY THE VAV BOX SPACE TEMPERATURE SENSOR, THE UNIT PRIMARY AIR VALVE SHALL MODULATE OPEN TO MAINTAIN THE SPACE TEMPERATURE SETPOINT. THE SPACE THERMOSTAT MODULATES THE HEATING COIL VALVE TO REHEAT AIR, WHEN NECESSARY, TO MAINTAIN SPACE TEMPERATURE. ON A CONTINUED FALL IN SPACE TEMPERATURE, THE UNIT PRIMARY AIR VALVE SHALL MODULATE TO ITS MINIMUM POSITION AND THE UNIT HOT WATER HEATING COIL TWO-WAY VALVE SHALL MODULATE OPEN TO MAINTAIN THE SPACE TEMPERATURE SETPOINT. THE HUMIDISTAT MODULATES PRIMARY AIR VALVE TO PROVIDE NECESSARY DEHUMIDIFICATION. IT ALSO CONTROLS THE PRIMARY AIR VALVE IN SEQUENCE WITH HEATING IF SPACE HUMIDITY RISES ABOVE SET POINT BY MODULATING OPEN THE PRIMARY AIR VALVE. ON A FALL IN SPACE HUMIDITY, THE REVERSE OPERATION SHALL OCCUR.

AutoCAD SHX Text DURING OPTIMUM START AND NIGHT SETBACK, THE RESPECTIVE AIR HANDLING UNIT SHALL BE DE-ENERGIZED. DURING OPTIMUM START AND NIGHT SETBACK, THE UNIT PRIMARY AIR VALVE SHALL BE CLOSED, THE UNIT HEATING CONTROL VALVE SHALL BE OPEN AND THE VAV BOX FAN SHALL OPERATE. (VAV BOX FAN WILL NOT OPERATE DURING NIGHT SETBACK EXCEPT TO MAINTAIN THE NIGHT SETBACK TEMPERATURE.) THE RESPECTIVE AIR HANDLING UNIT SHALL BE ENERGIZED BY ITS DDC CONTROL PANEL ACCORDING TO A PREDETERMINED SCHEDULE AND THE UNIT PRIMARY AIR VALVE SHALL RETURN TO ITS MINIMUM OPEN POSITION.

AutoCAD SHX Text WHEN THE ASSOCIATED AIR HANDLING UNIT CONTROLS ARE ENERGIZED BY THE DDC CONTROL PANEL, THE FAN POWERED VAV BOX CONTROL SHALL BE ENABLED AND THE VAV BOX FAN ENERGIZED (BEFORE THE AIR HANDLING UNIT SUPPLY FAN IS ENERGIZED) AND SHALL RUN CONTINUOUSLY.

AutoCAD SHX Text

SEQUENCE OF OPERATION

AutoCAD SHX Text

VAV BOX UNIT MOUNTED

AutoCAD SHX Text

TERMINAL EQUIPMENT

AutoCAD SHX Text

TO DEVICES

AutoCAD SHX Text

CONTROL PANEL

AutoCAD SHX Text

INTEGRAL

AutoCAD SHX Text

DISCONNECT

AutoCAD SHX Text

DI

AutoCAD SHX Text

DO

AutoCAD SHX Text

AO

AutoCAD SHX Text

AI

AutoCAD SHX Text

UNIT MOUNTED

AutoCAD SHX Text

FILTER

AutoCAD SHX Text

RETURN AIR

AutoCAD SHX Text

OPENING

AutoCAD SHX Text M

AutoCAD SHX Text

SERIES CONSTANT

AutoCAD SHX Text

VOLUME FAN

AutoCAD SHX Text

PRIMARY AIR VALVE

AutoCAD SHX Text

CONTROL PANEL.

AutoCAD SHX Text

SENSOR SET AT 76%%DF

AutoCAD SHX Text

SPACE TEMPERATURE

AutoCAD SHX Text

SPACE HUMIDITY

AutoCAD SHX Text

SENSOR SET AT 50% RH

AutoCAD SHX Text

TCU

AutoCAD SHX Text H

AutoCAD SHX Text T

AutoCAD SHX Text

TO UNIT DDC

AutoCAD SHX Text

SUPPLY AIR TEMPERATURE SENSOR

AutoCAD SHX Text

HWS

AutoCAD SHX Text

EP

AutoCAD SHX Text

HWR

AutoCAD SHX Text

NO

AutoCAD SHX Text M

AutoCAD SHX Text T

AutoCAD SHX Text

UNIT MOUNTED HOT WATER

AutoCAD SHX Text

HEATING/REHEAT COIL

AutoCAD SHX Text

SUPPLY AIR

AutoCAD SHX Text

LOW VELOCITY

Legends, Symbols & Icons Duplex Outlet, 15 Amp, 3W, 125V, Flush mounted

Switch, inline, 125V, single pull. flush mounted

Non-metallic cable (romex type) wiring

General Installation Requirements

1. All installation work will be completed during normal business hours, exceptions will be made.

2. Competitive equipment may be used in lieu of models specified.

3. Drawing are diagrammatic, contractor will verify equipment positions and adjust power and controls conduit path accordingly.

4. Support conduit per NEC 2020.

5. Coordinate installation with other trades.

6. All wire must 75° C rated or higher, THW, THHW.

Electrical Installation Requirements

1. All electrical work must be done by a NC licensed electrician.

2. All electrical work must comply with the NEC 2020.

3. Wire connection shall be twist tied with appropriate sized cap.

4. All contractor provided electric materials, devices, appliances and equipment shall be label-listed by a North Carolina approved third party testing agency.

5. The new circuit breakers shall match existing breakers for actual interrupt capacity.

6. Conductors shall match existing color code as follows.

6.1. 277/480V, 3 Phase, 4 - Wire 208/120V, 3 Phase, 4-Wire

6.2. Phase A - Brown Phase A - Black

6.3. Phase B - Orange Phase B - Red

6.4. Phase C - Yellow Phase C - Blue

6.5. Neutral - Grey Neutral - White

7. Relocate light fixtures from under the location of the designated hood locations.

8. Surge Protector shall be Siemens TPS3 C 12 10 0 X 02 or equivalent.

9. Lockout breakers are required where lockable disconnect are not present.

10. Contractor to install circuits and update panels as shown in schedules.

Conduit and Wire for Power

Conduit and wire concealed under floor

Low voltage control wire

Home run to panelboard

Empty Conduit

Connect to existing at this point

Remove to this point

EC

NM

S a

Switch, inline, 125V, three way. flush mounted S

Switch, inline, low voltage, single pull. flush mounted

S

L

Switch, inline, 125V, double pull. flush mounted S dp

Switch, inline, 125V, 4 way. flush mounted S

Switch, inline, 125V, key operated. flush mounted S k

Switch, door operated see spec for details S d

Switch, weather proof enclosure see spec for details

S wp

Switch, momentary contact S mc

Quad Outlet, 15 Amp, 3W, 125V, Flush mounted

Outlet, 20 Amp, 3W, 250V, NEMA 6-20R a

Outlet, 20 Amp, 3W, 250V, NEMA L6-20R b

Outlet, 15 Amp, 3W, 250V, NEMA 6-15R c

GFCI Duplex Outlet, 15 Amp, 3W, 125V, Flush Mount

GFCI

GFCI Duplex Outlet, 15 Amp, 3W, 125V, WP, Outdoor Duty

GFCI-WP

D

Outlet - Box - Mounted Dimmer

D

Outlet - Box - Mounted Switch and Dimmer

S

R

Outlet - Box - Relay

J

Junction Box

DS

Disconnect Box, see specs for details

Automatic transfer switch, see specs for details

T

S

Data Communications Outlet

Residential Telephone jack, typ.ph

SD

Smoke detector, see specs for details

Audible horn or annunciator, see specs for details

TV

AV Outlet

Panelboard, see schedule for details

PNL - A

Transformer, dry type, see schedule for details

M Motor, Type 1,see schedule for specs

M C

Motor controller, Type 1,see schedule for specs

M C

Combination motor controller & disconnect, Type 1,see schedule for specs

M C

Combination motor controller & circuit breaker, Type 1,see schedule for specs

CB

DS

Push button station, momentary contact

Push button station, maintained contact

H

A

O

Hand - Off - Auto type, motor control unit

A1

H1

M1

MD1

D1

R1

Lighting fixture, flourescent, 4 bulb, see schedule for details

Lighting fixture, high pressure sodium, see schedule for details

Lighting fixture, metal halide, see schedule for details

Lighting fixture w/ motion detector, 2 bulb, see schedule for details

Lighting fixture, directional, single bulb, see schedule for details

Lighting fixture, recessed, single bulb, see schedule for details

E1

FL1

E

Emergency exit sign, see schedule for details

Emergency exit sign and egress lighting, see schedule for details

Emergency notification appliance

Emergency pull station

M

Power supply meter

Emergency annunciator appliance F

L1

Lighting fixture, miscellaneous, see schedule for details

Occupancy Sensor and Switch S

Conductor Sizing Table

For 120V - 20A Branch Circuits Only, Unless Otherwise Noted

These tables are based on an evenly distributed load allowing 3% voltage drop at last outlet:

For 277V - 20A Branch Circuits Only, Unless Otherwise Noted

If distance A + B in feet is (see diagram below)

0' to 100'

100' to 175'

175' to 300'

300' to 450'

Use copper wire in metallic conduit, AWG size as follows on entire circuit and size conduit accordingly

#12 (min.)

#10

#8

#6 (max.)

If distance A + B in feet is (see diagram below)

0' to 250'

250' to 400'

400' to 700'

700' to 1000'

Use copper wire in metallic conduit, AWG size as follows on entire circuit and size conduit accordingly

#12 (min.)

#10

#8

#6 (max.)

PNL - A

R1

R1

A (FT)

B (FT)

1st device on CKT

Last device on CKT wire length from first to last device on CKT

PNL - A

R1

R1

A (FT)

B (FT)

1st device on CKT

Last device on CKT wire length from first to last device on CKT

SECTION 260500 - COMMON WORK RESULTS FOR ELECTRICAL

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings: E0.1, E1.1, E1.2, E3.1 and E3.2

1.2 SUMMARY

A. This section includes the following

1. Electrical equipment coordination and installation.

2. Common electrical installation requirements.

1.3 COORDINATION

A. Coordinate arrangement, mounting, and support of electrical equipment:

1. To allow maximum possible headroom unless specific mounting heights that reduce headroom are indicated.

2. To provide for ease of disconnecting the equipment with minimum interference to other installations.

PART 2 - PRODUCTS

2.01 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by standard electrical supply manufacturers.

2.2 INSPECTIONS

A. Contractor shall contact the Gaston County Inspections to schedule electrical inspections and to schedule a final inspection.

PART 3 - EXECUTION

3.1 COMMON REQUIREMENTS FOR ELECTRICAL INSTALLATION

A. Comply with NECA 1.

B. Comply with NEC C. Comply with North Carolina Electrical Building Code D. Equipment: Install to facilitate service, maintenance, and repair or replacement of components of both electrical equipment and other nearby installations. Connect in such a way as to facilitate future disconnecting with minimum interference with other items in the vicinity.

E. EMT to be used only in dry indoor locations with steel compression fittings and connectors.

END SECTION 260500

SECTION 260519 - LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings: E0.1 and E1.1

1.2 SUMMARY

B. This section includes the following

1. Requirements for building wire and cable

1.3 COORDINATION

A. Coordinate electrical testing of electrical items, so equipment and systems that are functionally interdependent are tested to demonstrate successful interoperability.

PART 2 - PRODUCTS

2.01 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by standard electrical supply manufacturers.

B. All building wire and cables should be listed by a North Carolina “approved” third party testing agency

2.2 INSPECTIONS

A. Contractor shall contact the Gaston County Inspections to schedule electrical inspections and to schedule a final inspection.

PART 3 - EXECUTION

3.1 COMMON REQUIREMENTS FOR ELECTRICAL INSTALLATION

A. Comply with NECA 1.

B. Comply with NEC C. Comply with North Carolina Electrical Building Code

3.2 WORK REQUIREMENTS FOR ELECTRICAL INSTALLATION

A. Provide and install an individual neutral wire for each branch circuit.

B. Conductors for power and lighting that are sized #10 AWG and smaller shall be solid copper conductors. All power conductors that are #8 AWG and larger shall be class B stranded copper conductors.

C. The minimum size for power branch circuit wiring is #12 AWG.

D. Fire alarm and control wiring may be equipped with stranded conductors that are sized #14

AWG.

E. Branch circuit conductors should be sized to prevent a voltage drop exceeding (3%) and the maximum voltage drop on both feeders and branch circuits should not exceed (5%)

F. Provide and install a full size individual neutral wire for each circuit.

G. The insulation type for interior wiring shall be dual-rated THHN/THWN or XHHW.

H. Where the conductor length from the panel to the first outlet on a 277 volt circuit exceeds 125 feet, the branch circuit conductors from the panel to the first outlet shall not be smaller than #10 AWG.

I. Where the conductor length from the panel to the first outlet on a 120 volt circuit exceeds 50 feet, the branch circuit conductors from the panel to the first outlet shall not be smaller than #10 AWG.

J. Joints in solid conductors shall be spliced using Ideal "wirenuts", 3M Company "Scotchlock" or T&B connectors in junction boxes, outlet boxes and lighting…