C-2 Attachment 3-4 Amendment HVAC Modernization Mechanical Drawings.pdf
PDF 2 MB Posted
- Attached to
- JRD Compound Heating - Ventilation - Air Conditioning & Envelope Improvements Federal contract opportunity
- Solicitation number
- 1240BJ26Q0001
- Issued by
- Department of Agriculture Forest Service
About this file
Summary of ANM-JRD Compound HVAC Modernization Construction Drawings
This document set comprises architectural and mechanical construction drawings for the ANM-JRD Compound HVAC Modernization project located at the Juneau Ranger District of Tongass National Forest in Alaska. The project, prepared by Alaska Energy Engineering LLC under registered professional engineer James A. Rehfeldt (ME-8987), includes comprehensive specifications for heating system upgrades, direct bury piping installation, and digital direct control (DDC) system implementation across three buildings: the Office Building, Warehouse Building, and Storage Building.
The heating system (M601) replacement includes two concrete pad-mounted boilers (B-1 and B-2) connected to existing heat sink/heat recovery piping serving all three buildings at specified flow rates (72 GPM to Storage, 28 GPM to Warehouse, 72 GPM to Office). The project incorporates 2-inch and 1.5-inch heat source/heat recovery direct bury piping with expansion loops, eight boreholes for loopfield installation, wall penetrations, and anchors per manufacturer specifications. Control infrastructure (M702) requires installation of DDC conductors, CAT6 cables, and conduit routing between three control panels (PNL-3 in Office Building, PNL-1 in Warehouse, PNL-2 in Storage Building). The warehouse and storage building controls include supply fan sequencing with temperature reset, low-limit safeties set at 38°F, occupied/unoccupied mode scheduling, CO and NO2 monitoring sensors with alarm thresholds, exhaust fan control tied to humidity and air quality parameters, and energy metering with 5-minute interval archiving. All work must comply with utility locate requirements, record drawings, and manufacturer installation instructions, with pipe insulation repair required where balance valves are replaced.
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STORAGE BUILDING LOOPFIELDEIGHT BOREHOLES,
DIRECT BURY 2" HS/HR [1] [2]
4/M203
DIRECT BURY 3" HS/HR [1] [2]
4/M203
EXPANSION LOOPS [3]
ROUTE HS/HR UNDER
SLAB 3/M203
WALL PENETRATION 2/M203
DIRECT BURY PIPING
ANCHOR 5/M203
1/M304
1/M501
1/M401
ROUTE HS/HR UNDER
SLAB 3/M203
DIRECT BURY PIPING
ANCHOR 5/M203
PROVIDE DDC CONTROL
CONDUCTORS [4]
DATENO.
REVISION / ISSUE
(R10)
ALASKA REGION
06.20.2025
Alaska
ENGINEERING LLC
25200 Amalga Harbor Phone: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us
Energy
JR
JR / KB
JR
James A. Rehfeldt
ME-8987
R EGIS T ER E D PR O FE S S IO NA L ENGINEER
NOTE: 11"x 17" PRINT IS HALF SIZE
TONGASS NATIONAL
FOREST
JUNEAU RANGER DISTRICT
M202
SITE PLAN
ANM-JRD
COMPOUND
HVAC
MODERNIZATION
FOR
CONSTRUCTION
06/20/2025
DRAWING NOTES
[1] Locate the direct bury piping along the same routing as the existing piping. Refill excavations to allow vehicle use when work is not occurring.
[2] Install direct bury piping per manufacturer's instructions.
[3] Expansion loops sized by piping manufacturer. Install per manufacturer's instructions.
[4] Install control conduit and CAT6 cables from PNL-3 in the
Office Building to PNL-1 in the Warehouse and from PNL-1 to PNL-2 in the Storage Building. Install conduits in piping trench as detailed in the Civil Drawings and route through building as required.
GENERAL NOTES
· Refer to the record drawings for information on site utilities.
· Provide utility locates prior to excavation.
N
SITE PLAN
SCALE: 0 80'20' 40'M202
ADDENDUM 2 3-18-26
DN
UP
DN
RE
F
VENDVEND
RE
F
CORR.
A-211
ENTRY
A-207
RECREATION
A-201
JAN.
A-204
SECURITY
A-208
OFFICE
A-203A
MEN
A-206
CORR.
A-217
STAIR
A-218
FISH & WILDLIFE
A-216
OFFICE
A-216A
ENGINEERING
A-215
MINERALS
A-202
REC.
OFF.
A-201A
OFFICE
A-202A
MECHANICAL
SHAFT
SPECIAL USES
A-203
WOMEN
A-205
ELEV.
A-110
STAIR
A-213
RANGER
A-214
CORR.
A-212
LUNCH
A-209
CONF.
A-210
FEC
FEC
1 2 3 4 5 6 7 8 9 10
F
E
D
C
B
A
(E) FTU-18
[1]
DATENO.
REVISION / ISSUE
(R10)
ALASKA REGION
06.20.2025
Alaska
ENGINEERING LLC
25200 Amalga Harbor Phone: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us
Energy
JR
JR / KB
JR
James A. Rehfeldt
ME-8987
R EG IS T ER ED PR O FE S S IO NA L ENGINEER
NOTE: 11"x 17" PRINT IS HALF SIZE
TONGASS NATIONAL
FOREST
JUNEAU RANGER DISTRICT
M304
OFFICE BUILDING
SECOND FLOOR PLAN
ANM-JRD
COMPOUND
HVAC
MODERNIZATION
FOR
CONSTRUCTION
06/20/2025
4'SCALE: 0 1' 2'
N
OFFICE BUILDING SECOND FLOOR PLAN
4'SCALE: 0 16'8'
N
DRAWING NOTES
(1) Replace two balance valves 2/M801. Update DDC control sequence 3/M701.
General Notes
· Refer to the Record Drawings for balance valve replacement piping diagrams.
· Repair pipe insulation where balance valves are replaced. Match existing insulation.
M304
1 2 3 4 5 6 7 8 9 10
F
E
D
C
B
A
DN
UP
DN
1 2 3 4 5 6 7 8 9 10
F
E
D
C
B
A
(E) AHU3-1
[2]
(E) EF3-1
[4]
(E) EF3-2
[4]
(E) REF3-1
[3]
(E) FTU-15
[1]
(E) FTU-14
[1]
(E) FTU-16
[1]
(E) FTU-19
[1]
(E) FTU-17
[1]
(E) FTU-20
[1]
DN
1 2 3 4 5 6 7 8 9 10
F
E
D
C
B
A
(E) FTU-22
[1]
(E) FTU-23
[1]
(E) FTU-21
[1]
DATENO.
REVISION / ISSUE
(R10)
ALASKA REGION
06.20.2025
Alaska
ENGINEERING LLC
25200 Amalga Harbor Phone: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us
Energy
JR
JR / KB
JR
James A. Rehfeldt
ME-8987
R EG IS T ER ED PR O FE S S IO NA L ENGINEER
NOTE: 11"x 17" PRINT IS HALF SIZE
TONGASS NATIONAL
FOREST
JUNEAU RANGER DISTRICT
M305
OFFICE BUILDING ATTIC
PLAN
ANM-JRD
COMPOUND
HVAC
MODERNIZATION
FOR
CONSTRUCTION
06/20/2025
4'SCALE: 0 1' 2'
N
OFFICE BUILDING ATTIC PLAN
4'SCALE: 0 16'8'
N
DRAWING NOTES
[1] Replace two balance valves 2/M801. Update DDC control sequence 3/M701.
[2] Replace three balance valves 1/M801. Update DDC control sequence 2/M701.
[3] Update DDC control sequence 2/M701.
[4] Update DDC control sequence 4/M701.
GENERAL NOTES
· Refer to the Record Drawings for balance valve replacement piping diagrams.
· Repair pipe insulation where balance valves are replaced. Match existing insulation.M305
DATENO.
REVISION / ISSUE
(R10)
ALASKA REGION
06.20.2025
Alaska
ENGINEERING LLC
25200 Amalga Harbor Phone: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us
Energy
JR
JR / KB
JR
James A. Rehfeldt
ME-8987
R EG IS T ER ED PR O FE S S IO NA L ENGINEER
NOTE: 11"x 17" PRINT IS HALF SIZE
TONGASS NATIONAL
FOREST
JUNEAU RANGER DISTRICT
M601
HEATING SYSTEM
DIAGRAM
ANM-JRD
COMPOUND
HVAC
MODERNIZATION
FOR
CONSTRUCTION
06/20/2025
T
T
B-1
CONCRETE PAD
P-1
T
B-2
P-2
T
T
(R) AS-1
ET-1 P-3A P-3B
3 (E) 2-1/2
(E) 2-1/2
(E) 2" HS/HR
TO OFFICE BLDG
2ND/3RD FLOORS
(E) 1-1/2" HS/HR
TO OFFICE BLDG
1ST FLOOR
DIRECT BURY PIPING
SCALE: NONE
HEATING SYSTEM DIAGRAM
OFFICE BUILDING
(E) 1-1/2" HS/HR TO
STORAGE BLDG
REPLACE BALANCE
VALVE 21 GPM
WAREHOUSE BUILDING STORAGE BUILDING
2 2
(E) 2" HS/HR TO
WAREHOUSE BLDG
28 GPM
65 GPM
114 GPM
72 GPM
72 GPM
(E) 1/2SET AT
20 PSIG
1/2
P
T
F
T
FLOW METER [2]
BTU METER [1]
T
F
T
FLOW METER [2]
BTU METER [1]
1-1/2 1-1/2
BTU METER [1]
T
T
F
FLOW METER [2]
DRAWING NOTES
[1] Alternative #2: Provide Omicon System 10 BTU meter with temperature sensors. Install sensor in thermowell filled with thermo-conductive paste. Install per manufacturers recommendations. Provide control monitoring 5/M702.
[2] Alternative #2: Provide Omicon FT-3400 Flow Meter. Install with 24” of straight and unobstructed pipe upstream of meter and 12” downstream of meter. Install per manufacturers recommendations.
P
M601
1/2
1/2
(R) CHEMICAL
FEEDER
DRAWING NOTES
[1] Provide CO and NO2 monitoring sensor (ToxAlert TOXEC) mounted at the level of the existing overhead lighting. Configure sensors for DDC monitoring of gas concentration level.
DATENO.
REVISION / ISSUE
(R10)
ALASKA REGION
06.20.2025
Alaska
ENGINEERING LLC
25200 Amalga Harbor Phone: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us
Energy
JR
JR / KB
JR
James A. Rehfeldt
ME-8987
REG IST ER ED P R O FE S S IO NA L ENGINEER
NOTE: 11"x 17" PRINT IS HALF SIZE
TONGASS NATIONAL
FOREST
JUNEAU RANGER DISTRICT
M702
WAREHOUSE AND
STORAGE BUILDING
CONTROLS
ANM-JRD
COMPOUND
HVAC
MODERNIZATION
FOR
CONSTRUCTION
06/20/2025
(E) FILTER(E) OAD
(E) RAD
AO
AI
DA
T
(E) SUPPLY FAN
AO VA
T
AI
T
OUTSIDE
AIR
SUPPLY
AIR
(E)
(E)
(E)
(E)
HC
AIRAT
RETURN AIR
DO
C
AI
CS(E) (E) (E) (E)
(E)
A. Scope: Replace the existing DDC control, monitoring and alarm sequence with the following sequence.
B. Control
1. Supply Fan Controller: An existing magnetic starter supplies power to the fan motor.
a. Auto: Fan and system operate in accordance with the control sequence.
b. Hand: Fan and system operate in occupied mode.
c. Off: Fan is off and system is in unoccupied mode.
2. Safeties
a. Smoke/Fire Alarm (ASU-2 Only): When a fire alarm is activated at the fire alarm control panel, place the system in unoccupied mode.
b. Low Limit Thermostat: When the low limit temperature drops to 38℉, disable the fan, position the mixing dampers to full recirculation, and position the heating coil valve to fully open.
When the mixed air temperature rises to 50°F, automatically restore system operation. When the low limit control occurs three times in 24 hours, disable the system until manually reset.
3. Schedule: Schedule the system to operate in occupied and unoccupied modes.
4. Occupied Mode: Operate the system as follows.
a. Supply Fan: Enabled.
b. Supply Air Temperature Control
1) Supply Air Temperature Setpoint: Reset the setpoint with outside temperature as follows. Vary the setpoint linearly between the two control points.
a) Tosa<20°F, Tsa = 72°F
b) Tosa>60°F, Tsa=60°F
2) Warm Up: When the system enters occupied mode, position the dampers to the full recirculation position until the return air temperature reaches 68℉.
3) Normal: Sequentially modulate the mixing dampers and heating coil valve to maintain the supply air temperature setpoint.
a) Maintain a minimum mixed air temperature of 45°F.
b) Maintain a minimum outside airflow of 1,200 cfm as set by the TAB contractor with the FTU supply air dampers set to the minimum position.
5. Unoccupied Mode: Operate the system as follows.
a. Supply Fan: Disabled.
b. Dampers: Full recirculation position.
c. Heating Coil: Disabled.
B. Display and Monitoring: Provide a graphic display of the system and points. Archive all points at 5-minute intervals.
C. Alarms
1. Critical
a. Supply Fan: Activate when the fan status differs from command.
b. Low Limit: Activate if system is disabled due to low limit control.
2. Non-critical
a. Supply Air Temperature: Activate after the system has been in occupied mode 15 minutes and the supply air temperature differs from the setpoint by 5°F for 30 minutes.
b. Filter Alarm: Activate when the filter differential pressure exceeds 0.25" w.g.
c. Low Limit: Activate if a low limit safety occurs.
D. Trend Reports
1. Fans: Supply fan command; Supply fan status
2. Temperature: Outside air temperature; Room temperature setpoint, Room temperature; Supply air setpoint; Supply air temperature; Outside air damper position, Heating coil valve position.
A. Scope: Replace the existing DDC control, monitoring and alarm sequence with the following sequence.
B. Controller: A manual starter supplies power to the fan motor.
C. Control
1. Occupied Mode: When HV-1 is in normal occupied mode, enable the exhaust fan.
2. Unoccupied and Warmup Mode: When AHU3-1 is in unoccupied or warmup mode, disable the exhaust fan.
D. Display and Monitoring: Display and archive all points shown on the control diagram.
E. Alarms
1. Non-critical
a. Activate when the exhaust fan status differs from the command.
F. Exhaust Fan Trend Report: Fan command; Fan status
C
T
CH3-1
120VHS / HR
(E)
A. Control: Enable the fan when the room temperature is below the setpoint.
The heating coil has continuous flow.
B. Display and Monitoring: Display and archive all points shown on the control diagram.
(E)
DA C
C0-NO2 C0-NO2
H
DA C
DAT
(E) (E)
DO
(E) EF-2
AI AI
(E)
DO
(E) (E)
DO
(E) EF-1
(E)
(E) HC-1
AI
AO
A. Scope: Replace the existing DDC control, monitoring and alarm sequence with the following sequence.
B. Control
1. Enable EF-1 and EF-2 and Heating Coil HC-1 when any of the following occurs:
a. Humidity: Enable when building humidity level exceeds 60% for 5 minutes and disable when it is below 50% RH for 5 minutes.
b. Carbon Monoxide (CO): Enable when the CO level at any sensor exceeds 10 ppm for one minute and disable when CO level is below 5 ppm for 5 minutes.
c. Nitrogen Dioxide (NO2): Enable when the NO2 level at any sensor exceeds 5 ppm for one minute and enable when NO2 drops below 1 ppm for 5 minutes.
2. Heating Coil HC-1
a. Outside Temperature Above 32℉: When EF-1 or EF-2 is operating, open the outside air damper and modulate the control valve to maintain 50℉ supply air temperature.
b. Outside Temperature 32℉ of Below
1) When EF-1 and EF-2 are not operating, open the control valve to 30%.
2) When EF-1 or EF-2 is operating, modulate the control valve to maintain 50℉ supply air temperature.
3. Exhaust Fans EF-1 and EF-2: Open the respective exhaust air damper and enable the exhaust fan after the damper is fully open.
B. Display and Monitoring: Display and archive all points shown on the control diagram.
C. Alarms
1. Carbon Monoxide: Activate when the CO level exceeds 10 ppm for 5 minutes and provide an audio/visual alarm in the Storage Building.
2. Nitrogen Dioxide: Activate when the NO2 level exceeds 5 ppm for 5 minutes. and provide an audio/visual alarm in the Maintenance Bay.
D. Trend Reports: Collect the following points at 5-minute intervals
1. Air Quality
a. Relative Humidity
b. CO concentration
c. NO2 concentration
[1] [1]
(E)
DO
VA
HEATING / VENTILATING UNIT HV-1 CONTROL
EXHAUST FAN EF-3 AND EF-4 CONTROL
STORAGE BUILDING PURGE VENTILATION CONTROL
CABINET UNIT HEATER CH3-1 CONTROL
C
AI
CS
(E) EXHAUST FAN
(E) (E)
EXHAUST
AIR
EXHAUST
AIR
M702
M702
M702
M702
ADDENDUM 2 3-18-26
A. Scope: Monitor the heating supply and return flow and temperature to each building.
B. Display and Monitoring: Display and archive all points shown on the control diagram.
1. Sum monthly energy use for each building. Populate a 3-year table of monthly energy use for each building.
C. Trend Reports: Collect the following points at 5-minute intervals for each building.
1. Heating supply temperature (°F); heating return temperature (°F); flow rate (gpm), energy flow (MBH)
ENERGY METER CONTROL
M702
AO - THS
AO - THR
AO - GPM
AO - BTUH
BTU
METER
T
T
F
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