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

Site Address: 400 Rhodes Perimeter Dr. 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 supply and air handler to heat a college building and the addition of a boiler and new air handler to heat and cool the building. New controls, pumps, and air purification system and ancillary equipment will be installed.

Location Map

G0.1

COPYRIGHT

Project No:

01-2026006

Scale: N/A

Date: 04-27-2026

Title: Cover Sheet

B e a m

A d m i n i s t r a t i o n

B u i l d i n g

A

H U

R e d e s i g n

G a s t o n

C o l l e g e

R h o d e s

P e r i m e t e r

D r

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.

G0.2

COPYRIGHT

Project No:

01-2026006

Scale: N/A

Date: 04-27-2026

Title: Appendix B

B e m i n i s t r a t i o n

B u i l d i n g

A

H U

R e d e s i g n

G a s t o n

C o l l e g e

R h o d e s

P e r i m e t e r

D r

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

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.

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. Administration areas shall be controlled by local thermostat. All other areas shall be controlled by

BAS.

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

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

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

AS1 Hot Water

Spirotherm

VDT200 30 .37 1.8 66

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. Ceiling Hung

2. Comparable manufactuers are B&G, Taco and Amtrol

Expansion Tank Schedule

Plan ID Service Manufacturer Model #

Tank

Volume, Gallons

Water Pipe

Size &

Schedule

Weight

Accessories Comments

ET-1 Hot Water Bell and Gossett AX-10-DD 6.4 1", Sch 40

1, 2 1, 2

Accessories:

1. Airtrol Tank fitting

2. Air removal device

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

1 500 500

TOTAL BUILDING LOAD MBH = 500

GAS PIPE SIZING CALCULATIONS

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

Total Gas Input (new equipment): 500

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

■ Length: 25'-0" LN/FT

■ Fittings Factor: 1.25 (25%)

■ Total Equivalent Length of 32 ft

■ Natural Gas Steel: Schedule 40 Metallic Pipe

Accessories:

1. Install on 6" concrete pad

2. 75 PSIG pressure relief valve

3. Variable Prime boiler pump control

4. Exterior (outdoor) packaged

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

BP

Boiler Primary

Bell and Gosset 90 Series 34 45 45 1.5 3500 208/ 3

"D, 1

"S,sch 40 N

1, 2 1, 2, 3

CWP

Chiller Primary Armstrong Existing

67.2 24

Existing Existing Existing

208/ 3

Existing

N

Existing

Comments:

1. Install inline with service pipe

2. Comparable manufacturers are Grundfos, Taco, Bell and Gossett, Armstrong

3. H2O

4. Existing Pump

Accessories:

1. Differential Pressure Gauges

2. Variable frequency drive capable

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 500 500 490 98% Nat. Gas 3.5 10:1 1, NPT 2", sch 40

160°/180° 96 15 4"Ø AL29-4C 48" x 25" x 42"

120V/ 1ɸ/ 3.1 A

1, 2, 3 1, 2

Comments:

1. Install on new concrete pad

2. ASME (CSD-1) Compliant

3. Equivalent manufacturers are Laars, Patterson-Kelly, Fulton and Raypack

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. Factory provided air filter slot w/ 2" MERV 8 filter

2. Field installed DDC Compatible Controls: Modbus, BACnet MS/TP, BACnet IP capable communication

3. Multi-zone damper assembly, 7 zones configuration

4. 2" double wall construction with R-13 insulation injected foam insulation

5. Fused 65 kAIC SCCR disconnect

6. HOA Switch for manual control

Comments:

1. Install unit using the factory recommended specifications

2. Cooling coil performance based on 25% Propylene Glycol

3. Unit has 3 fans in fan wall

4. Equivalent manufacturers are Daikin, Carrier, Nortek and Trane

AHU Unit Schedule

Plan ID Service Area

Manufacturer or Equal

Model #

Fan Data

Hot Water Cooling Coil Data Chilled Water Cooling Coil Data

Electrical

Weight

Accessories Comments

Fan

Type

Fan Hp

Supply

CFM

ESP

(in w.c.)

Return

CFM

Min.

O.A.

Max.

O.A.

Entering Air

Temp. (dbF)

Leaving Air

Temp.

(dbF/wb F)

Total Heating

Capacity

(MBH)

EWT/ LWT

Max. Air

Press. Drop

(in w.c.)

Max. Water

Flow Rate

(GPM)

Max. Water

Press. Drop

(ft H20)

Control Valve

Type (2W or

3W)

Branch Pipe

Size &

Schedule

Leaving Air

Temp.

(dbF/wb F)

Total

Cooling

Capacity

(MBH)

Sensible

Cooling

Capacity

(MBH)

EWT/

LWT

Max. Air

Press.

Drop

(in w.c.)

Max. Water

Flow Rate

(GPM)

Max. Water

Press. Drop

(ft H20)

Control

Valve Type

(2W or 3W)

Branch Pipe

Size &

Schedule

Unit

Voltage

MOP MCA

AHU-1

Building

Daikin CAH026GMCM Wall 6.6 12,100

2.5 8470 1815 3640 55 95.1 510 180/ 140 0.63 34 2.3 3W

", sch 40 54/ 54 447 328 45/ 55 .68 96 16.6 3W

", sch 40 208/ 3 60 51.4 3744

1, 2, 3, 4, 5, 6 1, 2, 3, 4

M0.1

COPYRIGHT

Project No:

01-2026006

Scale: N/A

Date: 04-27-2026

Title: Mechanical

Schedules

B e m i n i s t r a t i o n

B u i l d i n g

A

H U

R e d e s i g n

G a s t o n

C o l l e g e

R h o d e s

P e r i m e t e r

D r

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

Pnl "B" Pnl "E"Pnl "A"

BAS

C

W R

C

W S

L

P

S

C o n d

R

From

Chiller

Plant

AHU-1

M1.0

COPYRIGHT

Project No:

01-2026006

Scale:

" = 1' - 0"

Date: 04-27-2026

Title: Mechanical

Demo Plan

B e m i n i s t r a t i o n

B u i l d i n g

A

H U

R e d e s i g n

G a s t o n

C o l l e g e

R h o d e s

P e r i m e t e r

D r

D a l l a s

N o r r o l i n a

B1

I P

Pnl "B" Pnl "E"Pnl "A"

BAS

C

W R

C

W S

From

Chiller

Plant

AHU-1

AS1

ET1

CWP

BP

Zone 7

Zone 6

Zone 1

Zone 5

Zone 2

Zone 3

Zone 4

H

W R

H

W S

New 2# Nat

Gas Meter

3 4

N a t

G a s

L i n e

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

Key Plan

Mechanical Demolition Requirements

1. Remove BAC controls box for relocation.

2. Demo duct connection above air handler.

3. Demo steam piping from AHU thru trench to pressure station and condensate pump.

4. Demo duct work connecting AHU to louvers.

5. Remove water heater for relocation.

6. Demo existing air handler.

7. Demo existing zone controllers and immediately following ductwork.

8. Demo piping connection to existing AHU.

9. Demo old phone switchboard.

10. Demo steam pressure station and condensate pump and all associated piping in pit. Cut and cap old steam lines.

B1

I P

Pnl "B" Pnl "E"Pnl "A"

BAS

C

W R

C

W S

From

Chiller

Plant

AHU-1

AS1

ET1

CWP

BP

Zone 7

Zone 6

Zone 1

Zone 5

Zone 2

Zone 3

Zone 4

H

W R

H

W S

New 2# Nat

Gas Meter

3 4

N a t

G a s

L i n e

M1.1

COPYRIGHT

Project No:

01-2026006

Scale:

" = 1' - 0"

Date: 04-27-2026

Title: Mechanical Plan

B e m i n i s t r a t i o n

B u i l d i n g

A

H U

R e d e s i g n

G a s t o n

C o l l e g e

R h o d e s

P e r i m e t e r

D r

D a l l a s

N o r r o l i n a

B1

I P

Pnl "B" Pnl "E"Pnl "A"

BAS

C

W R

C

W S

From

Chiller

Plant

AHU-1

AS1

ET1

CWP

BP

Zone 7

Zone 6

Zone 1

Zone 5

Zone 2

Zone 3

Zone 4

H

W R

H

W S

New 2# Nat

Gas Meter

3 4

N a t

G a s

L i n e

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

Key Plan

Mechanical Installation Requirements

1. Relocate BAC controls box to this location.

2. Route duct to new air handler return mixing box.

3. Install new outdoor boiler on concrete pad next to steam vault.

4. Route piping into steam pipe vault, route pipe through trench to AHU.

5. Install new air handler with vibration dampers.

6. Install new ductwork to connect outside air louvers to AHU.

7. Install air separator and ancillary equipment and piping.

8. Connect supply ductwork to new AHU supply.

9. Install new expansion tank over head.

10. Adjust piping of chilled water line and pump to route to new CHW section of AHU.

11. Tap and route make-up water line to tie into hot water line.

12. Route new gas line to new outdoor boiler.

13. Install ion generating air purifier on return duct.

14. Relocate hot water heater to under expansion tank here.

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

Gas Meter Takeoff Scale: N/A

Coordinate with Piedmont Gas to shut-off meter when piping modifications are installed

Install and tee and route gas piping to the roof for new RTUs

Ensure pipe support is seated properly

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

AHU Detail Scale: N/A

Boiler support pad Scale: N/A

P

P

Centrifugal air separator

High Capacity air vent

Pressure Gauge w/ needle valve

Globe Valve

Pressure reducing valve

Double check valve, (Backflow preventor assembly)

Low Capacity air vent

Pressure Gauge w/ needle valve

Expansion Tank

Drain Valve w/ hose connection

12" Min Drop underslung connection for thermal trap

System Connection (side or bottom of main header)

Gate valve

Install unit leaving adequate distance to remove strainer

Install support brackets

Floor

From System

To Pump Suction

Expansion Tank Detail 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 36" x 60" 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

Return Air

Mixing box and

Filters

Chilled Water

Cooling Section

Fan Housing

Section

Hot water coils

Outside Air

Rout flue arounb windows. Support per

MSS SP- 69

Route vent stack to above roof. Distance per

NC Building code.

M2.1

Flue Termination Scale: N/A

Exerior

Boiler

(B-1)

Minimum

2'

M2.1

COPYRIGHT

Project No:

01-2026006

Scale: N/A

Date: 04-27-2026

Title: Mechanical Details

B e m i n i s t r a t i o n

B u i l d i n g

A

H U

R e d e s i g n

G a s t o n

C o l l e g e

R h o d e s

P e r i m e t e r

D r

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.

AutoCAD SHX Text

PIPE HANGER RODS AND SUPPORT SPACING

Boilers Controls Diagram Scale: N/A

M3.2

Boiler (B-1)

Low

FlowCut-off

Control

MOD

BUS

Pressure/

Temperature

Safety Valve

" Gas Line with dirt leg

" Drain line

3/4" Drain line

From: Bldg Potable Water

Supply

Air & Dirt

Separator

2" Hot Water Supply

2" Hot Water Return

Temperature

Gauge with snubbed connector

T

T

VFD

BP

" Make up Water Supply

H o t

W a t e r

R e t u r n

H o t

W a t e r

S u p p l y

Boilers P and ID Scale: N/A

M3.1

Expansion Tank

T

MODBUS

CONTROLLER

LOW WATER

CUT-OFF

CONTROLLER

MODULATING

BURNER

BOILER (B1)

DIRECT DIGITAL

CONTROLLER

(BAS)

DI

T

BAC/net

Ethernet Module

DI DO AI AI AI DIDO

DI

PUMP

BP-1

HOA

VFD Controller

BOILER

EMERGENCY

SHUTOFF

TS

T

OUTSIDE AIR

TEMPERATURE

SENSOR OVER

NETWORK

MAIN BUILDING

THERMOSTAT

SENSOR

TEMPERATURE

SENSOR

TO: FRONT END BAS

TS

AI

AODI

DOAO

AI

AO

TO: HOT WATER SUPPLY

FROM: HOT WATER

RETURN

H o t

W a t e r

R e t u r n

T

AHU -1

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 ;

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.

When there is enough heat in the supply loop; then B -1 will remain active and the boiler will switch in stand-by mode until water temp drops 10 degrees.

Cooling Mode:

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

Boiler 1 will deactivate.

When boilers deactivates then;

BP-1 will remain on for 10 mins then deactivate.

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.

AHU Controls & Seq. of Ops.: CW & HW Scale: N/AM3.1

System Narrative: The air handlers will provide heating. cooling and fresh air to zone. During cooling or economizer mode, the air handler will provide fresh air to the zone. Zone control will be 7 day programmable. (Zone temperature = Z{x), where x =1,2,3... e.g. the zone designation) Initially set to 67° F.

OCCUPIED:

The unit will activate and run continuously during programmable occupied hours (initially set to 7:00 am to 6:00pm) and supply equipment design cfm air to zone.

HEATING MODE:

When in heating mode as defined by the programmed outdoor temperature dropping below the dead pan limit and the hot water supply pumps turned on and moving hot water then:

When the zone temperature drops below zone setpoint;

The hot water control valve (O - HW) will modulate to control leaving supply air temperature (T- SA) and the zone air temperature (T- Z{x}).

When the zone temperature is satisfied; then the hot water control valve (O - HW) will modulate to the bypass position.

DEAD BAND MODE & ECONOMIZER MODE:

There shall be and adjustable dead pan of minimum 10 degrees. Initially set to 67°F to 77°F.

Within dead band: Chilled control valve (O - CW) will modulate to the bypass position.Boiler will deactivate and boiler pump will deactivate..

During non-heating (economizer mode); Zone Air Handler(s) will switch on, Return air dampers will modulate to open. Outside air dampers (O - OAD) will modulate to minimum outside air intake. As temperature rises above dead band, then unit will switch to cooling mode. The multi-zone dampers assembly will modulate to satisfy the zones.

COOLING MODE:

When in cooling mode as defined by the programmed outdoor temperature rising above the dead band limit and the cold water supply pumps turned on and moving cold water then:

Zone Air Handler(s) will switch on, Return air dampers will modulate to open. Outside air dampers will modulate to minimum outside air intake.

When the zone temperature rises above zone set-point;

The water control valve (O - W) will modulate to control leaving supply air temperature (T- SA) and the zone air temperature (T- Z{x}).

When the zone temperature is satisfied; then the chilled water control valve (O - W) will modulate to the bypass position.

The multi-zone dampers assembly will modulate to satisfy the zones.

DEMAND OUTSIDE AIR:

During occupied hours. unit will test for Co2 and modulate outside air damper to maintain outside air quality.

If the sensor reads less than or equal to 750 ppm then unit will modulate (O - OAD) to 50% O.A. design flow.

If the Co2 sensor reads 751 ppm or greater then the unit will modulate (O - OAD) to 100% O.A. design flow

FREEZE PROTECTION:

FREEZE PROTECTION:

During unoccupied hours; if the (T - RA) is below 34°F (adj), then (O - OAD) will modulate to minimum out side air flow.

EMERGENCY:

When a smoke is detected in return duct, the air handler will be sent the shutdown signal and remain off until the emergency condition is cleared.

An alarm condition to the fire alarm control panel (FACP) will be sent.

Once the emergency condition is cleared. the units will re-engage using last known parameters.

Supply

Return

Supply Air to Zones

(SA)

T - SA

T - RA

H

O

A

O - HW

Return Air from Zone

(RA)

Outdoor Air

(OA)

O - RAD

O - OAD

AHU

Controller

I - CO2

I - DD

CW

Coils

FACP

Multizone

Damper

Array

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

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

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

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

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

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

8. Pull the new points into the JACE.

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

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

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

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

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

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

15. Boilers shall have BACnet Gateways.

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

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

18. 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.

19. 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.

20. 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.

21. All trends shall be done in the supervisor.

22. 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.

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

24. No graphics shall reside on the JACE.

25. All final BAS JACE tie-ins will be made using the College's preferred controls contractor.

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

27. Create programing in the JACE for start/stop of the HW Plant and the HW temp reset.

28. Add BACnet integration modules to the boilers and pumps.

29. Ion generating air purifier shall have dry contact for alarm to BAS.

30. Boilers shall have a manual rotation point.

31. Boilers shall have a dehumidification mode.

32. Outside air temperature shall be a software point from the supervisor.

HW

Coils

Supply

Return

O - CW

Multizone

Damper

Array

HW

Coils

M3.1

COPYRIGHT

Project No:

01-2026006

Scale: N/A

Date: 04-27-2026

Title: Mechanical Controls

B e m i n i s t r a t i o n

B u i l d i n g

A

H U

R e d e s i g n

G a s t o n

C o l l e g e

R h o d e s

P e r i m e t e r

D r

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

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 fixtures.

K. "Sta-kon" or other permanent type crimp connectors shall not be used for branch circuit connections.

L. Joints in stranded conductors shall be spliced by approved mechanical connectors and gum rubber tape or friction tape. Solderless mechanical connectors for splices and taps, provided with U/L-approved insulating covers, may be used instead of mechanical connectors plus tape.

M. Conductors, in all cases, shall be continuous from outlet to outlet and no splicing shall be made except within outlet or junction boxes, troughs and gutters.

N. The feeder, branch circuits shall be color coded.

END SECTION 260519

SECTION 260526 - GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings: E0.1 and E1.1

1.2 SUMMARY

C. This section includes the following

2. Grounding and bonding for raceways

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. The raceway system shall be not be relied on for ground continuity. A green grounding conductor, properly sized per NEC Table 250-122, shall be run in all power raceways.”

B. Provide and install a green grounding conductor in all power C. Test grounding and bonding system with a ground resistance tester demonstrating the resistance to ground is less than 25 ohms. Where the resistance is more than 25 ohms additional grounding will be required.

D. Grounding conductors, where insulated, shall be colored solid green. Conductors intended as neutral shall be colored solid white on 120/208 volt circuits and natural gray on 277/480 volt circuits.

END SECTION 260526

SECTION 260553 - IDENTIFICATION FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings: E0.1 and E1.1

1.2 SUMMARY

A. This section includes the following

1. Identification and labeling electrical systems

1.3 COORDINATION

A. Electrician will properly label all electrical equipment with labels.

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. Furnish and install engraved laminated phenolic nameplates for all safety switches, panelboards, transformers, switchboards, motor control centers and other electrical equipment supplied for the project for identification. Nameplates shall be securely attached to equipment with self-tapping stainless steel screws; if the screw sharp end is protected;

otherwise Rivets shall be used. Letters shall be approximately 1/2 inch high minimum.

Embossed, self-adhesive plastic tape is not acceptable for marking equipment. Nameplate material colors shall be:

1. Blue surface with white core for 120/208 volt equipment.

2. Black surface with white core for 277/480 volt equipment.

3. Bright red surface with white core for all equipment related to fire alarm system.

4. Dark red (burgundy) surface with white core for all equipment related to security.

5. Green surface with white core for all equipment related to "emergency" systems.

6. Orange surface with white core for all equipment related to telephone systems.

7. Brown surface with white core for all equipment related to data systems.

8. White surface with black core for all equipment related to paging systems.

9. Purple surface with white core for all equipment related to TV systems.

B. All empty conduit runs and conduit with conductors for future use shall be identified for use and shall indicate where they terminate. Identification shall be by tags with string or wire attached to conduit or outlet.

C. All outlet boxes, junction boxes and pull boxes shall have their covers and exterior visible surfaces painted with colors to match the surface color scheme outlined above. This includes covers on boxes above lift-out and other type accessible ceilings.

END SECTION 260553

SECTION 262726 - WIRING DEVICES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings: E0.1 and E1.1

1.2 SUMMARY

A. This section includes the following

1. Specifications for the installations of wiring devices

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. Device shall be third party tested as noted per sub-section 3.2 part B.

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. Toggle switches shall be single pole, three-way, or four-way as indicated on the drawings.

Switches shall be of the grounding type, with hex-head grounding screw, rated 20A, 120/277 volt, A.C only. Lighted handle switches shall have neon lights of the correct voltage rating where indicated on the drawings. All switches shall have quiet operating mechanisms without the use of mercury switches. All switches shall be listed by an "approved" third-party agency, approved for the voltage and amperage indicated.

B. Cover plates for flush mounted wiring devices and for telephone outlets shall be Type "302" stainless steel or nylon type, standard size, single or ganged as shown on the drawings.