ACS Training Center Unit Heater Replacement.pdf.crdownload
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- Attached to
- Snowden Training Center Mechanical Upgrades
- Solicitation number
- ANC-C-25-0011
- Issued by
- Anchorage Municipality, Alaska
About this file
This document is a detailed technical specification for unit heater replacements for the ACS Training Center, involving the Alaska Court System and AMC Engineers. The project involves replacing three gas-fired unit heaters (UH-1, UH-2, UH-3) in warehouse locations, with specific Modine models: HD100, PTP250, and BTP350. Each unit has unique specifications including input/output BTU ratings, motor characteristics, and installation requirements. The related state and local contract opportunity, Snowden Training Center Mechanical Upgrades (Project No. ANC-C-25-0011), has a bid submittal deadline of May 7, 2025, at 12:00 PM, with a mandatory pre-bid meeting and site inspection scheduled for April 22, 2025. On-site work is required to commence no later than June 23, 2025, with substantial completion expected within 3 months, and all invoicing to be completed by October 20, 2025.
The technical specifications detail extensive requirements for the unit heaters, including ETL certification, specific mechanical configurations, venting arrangements, casing construction, and electrical components. Each unit must meet ANSI Z83.8 standards, feature aluminized steel heat exchangers, have thermal efficiency of 82-83%, and include specific gas control and ignition systems. The project is funded through the Alaska Court System's procurement process, with bidders required to follow specific submission guidelines, including hand-delivering sealed bids to the Anchorage location. All questions and clarifications must be submitted to the Facilities Project Manager, Eddie Hebert, with a cut-off date of April 30, 2025.
Text of this file
UNIT HEATER SCHEDULE
SYMBOL LOCATION INPUT OUTPUT MOTOR WEIGHT REMARKS, BASIS OF DESIGN
(MBH) (MBH) (HP,V,PH) (LBS)
UH-1 EAST 350 287 1-1/2,115,1 400 GAS FIRED UNIT HEATER:
WAREHOUSE SINGLE STAGE, DIRECT SPARK IGNITION.
MODINE MODEL BTP350
UH-2 NORTHWEST 100 82 1/6,115,1 150 GAS FIRED UNIT HEATER:
WAREHOUSE SINGLE STAGE, DIRECT SPARK IGNITION.
MODINE MODEL HD100
UH-3 WEST 250 208 1/3,115,1 260 GAS FIRED UNIT HEATER:
WAREHOUSE SINGLE STAGE, DIRECT SPARK IGNITION.
MODINE MODEL PTP250
X:\24803 ACSTRAIN\Design Mech\Sched\ACSTRAIN Mech Schedules
5/16/2024
HTG UNIT
AccuSpec V4.50
SUBMITTAL SCHEDULE & DATA
Gas- and Oil-Fired Unit Heaters, Infrared Heaters, and Indoor Duct Furnaces
Job Name: Replacement Heaters Date: 05/14/2024 Location: Engineer: AMC Engineers Submitted by: Steve Kreun Architect:
Contractor:
Unit Tag
Model Number HD
100AS0111FBAN
PTP250AS0111SBA
N
BTP350AS0211NBA
N
Quantity of Units 1 1 1 Btu/Hr Input 100,000 250,000 350,000 Btu/Hr Output 82,000 207,500 287,000
CFM 1490 3995 4,200
Altitude 0-2000 0-2000 0-2000 Temperature Rise (degrees F) 51 48 63 External Static Pressure (E.S.P) 0.00 0.00 0.00 Total Static Pressure (T.S.P.) 0.00 0.00 0.000 Gas Type Natural Natural Natural Gas Control Type Single Stage, Direct
Spark Ignition, 100% Shut-Off with Continuous Retry
Single Stage, Direct Spark Ignition, 100% Shut-Off with Continuous Retry
Single Stage, Direct Spark Ignition, 100% Shut-Off with Continuous Retry
Supply Voltage 115/60/1 115/60/1 115/60/1 Control Voltage 24V 24V 24V Motor HP 1/6 1/3 1-1/2 Motor RPM 1100 1075 1725 Blower RPM N/A N/A 466 Heat Exchanger Type Aluminized Steel
Heat Exchanger/Burner
Aluminized Steel Heat Exchanger/Burner
Aluminized Steel Heat Exchanger/Burner
Thermal Efficiency % 82.0 83.0 82.0 Options & Accessories (See Attached Pages)
Remarks___________________________________________________________________________________________
UH-2 UH-1UH-3
Standards
All unit(s) shall include:
The gas fired unit heater(s) shall include ETL Listed and ETL Verified design certification for use in both the US and Canada to the ANSI Z83.8 - latest revision, standard for “Gas Unit Heater and Gas- Fired Duct Furnaces” for safe operation, construction, and performance.
Mechanical Configuration
Furnace(s) section with 82.0% minimum efficiency provided by an indirect-fired tubular heat exchanger with individually fired tubes for maximum heat transfer with minimal noise of flame ignition/extinction.
Venting Arrangement
The venting shall be a power exhausted arrangement. The unit shall be tested to insure proper ignition when the unit is subjected to 40 mile per hour wind velocities. The unit shall also include a factory mounted differential pressure switch designed to prevent main burner ignition until positive venting has been proven.
Unit Casing
The unit heater(s) casing shall be constructed of not less than 22 gauge aluminized steel with minimization of exposed fasteners.
All exterior casing parts shall be cleaned of all oils and a phosphate coating applied prior to painting. The exterior casing parts shall then be painted with an electrostatically applied baked-on gray-green polyester powder paint (7-mil thickness) for corrosion resistance.
The unit shall be furnished with horizontal air deflectors. The deflectors are adjustable to provide for horizontal directional airflow control (up or down).
Furnace Section
The heat exchanger(s) shall be made of 18 gauge aluminized steel tubes and headers.
The thermal efficiency of the unit(s) shall be a minimum of 82.0 efficient for all air flow ranges.
Each heat exchanger tube shall be individually and directly flame-fired. The heat exchanger tube shall be crimped to allow for thermal expansion and contraction. The flue collector box shall be made of 20 gauge aluminized steel.
The heat exchanger(s) seams and duct connections shall be certified to withstand 0.9" W.C.
external static pressure without burner flame disturbance.
The burner(s) shall be in-shot type, directly firing each heat exchanger tube individually and is designed for good lighting characteristics without noise of extinction for both natural and propane gas.
The ignition controller(s) shall be 100% shut-off with continuous retry.
The gas pressure shall be between 6-7" W.C for natural gas.
The solid state ignition system shall directly light the gas by means of a direct spark igniter each time the system is energized.
The unit gas controls shall be provided with the following:
Single-stage gas controls with a single-stage combination gas control, an ignition control. The unit fires at 100% full fire based on a call for heat from a room thermostat.
An automatic reset high limit switch mounted in the air stream to shut off the gas supply in the event of overheating.
A time delay relay that delays the start of the air mover to allow the heat exchanger a warm-up period after a call for heat. The time delay relay shall also continue the air mover operation after the thermostat has been satisfied to remove any residual heat in the heat exchanger.
The unit must be field adjusted for 0-2000 feet elevation above sea level. See units installation manual for instruction for altitude adjustments.
Electrical
All electrical components shall carry UL, ETL, or CSA certification.
A low voltage terminal board shall be provided for direct wiring connection to an external thermostat.
A single 115V to 24V step down transformer shall be provided for all unit controls.
Air Mover
The motor horsepower shall be 1/6 H.P.
The motor wiring shall be in flexible metal BX conduit.
The motor shall be controlled by a time delay relay.
Propeller models shall meet the following requirements:
The motor type shall be Single-Speed, Totally Enclosed (TE).
The air mover motor shall be a 115V motor.
Mounting
The unit shall be equipped with tapped holes to accept 3/8”-16 threaded rod for suspension.
Accessories
The following field installed accessory control devices shall be provided with the unit:
The gas fired unit heater(s) shall include ETL Listed and ETL Verified design certification for use in both the US and Canada to the ANSI Z83.8 - latest revision, standard for “Gas Unit Heater and Gas- Fired Duct Furnaces” for safe operation, construction, and performance.
Mechanical Configuration
Furnace(s) section with 83.0% minimum efficiency provided by an indirect-fired tubular heat exchanger with individually fired tubes for maximum heat transfer with minimal noise of flame ignition/extinction.
Venting Arrangement
The venting shall be a power exhausted arrangement. The unit shall be tested to insure proper ignition when the unit is subjected to 40 mile per hour wind velocities. The unit shall also include a factory mounted differential pressure switch designed to prevent main burner ignition until positive venting has been proven.
Unit Casing
The unit heater(s) casing shall be constructed of not less than 20 gauge aluminized steel with minimization of exposed fasteners.
All exterior casing parts shall be cleaned of all oils and a phosphate coating applied prior to painting. The exterior casing parts shall then be painted with an electrostatically applied baked-on gray-green polyester powder paint (7-mil thickness) for corrosion resistance.
The unit shall be furnished with horizontal air deflectors. The deflectors are adjustable to provide for horizontal directional airflow control (up or down).
Furnace Section
The heat exchanger(s) shall be made of 18 gauge aluminized steel tubes and headers.
The thermal efficiency of the unit(s) shall be a minimum of 83.0 efficient for all air flow ranges.
Each heat exchanger tube shall be individually and directly flame-fired. The heat exchanger tube shall be crimped to allow for thermal expansion and contraction. The flue collector box shall be made of 20 gauge aluminized steel.
The heat exchanger(s) seams and duct connections shall be certified to withstand 0.9" W.C.
external static pressure without burner flame disturbance.
The burner(s) shall be in-shot type, directly firing each heat exchanger tube individually and is designed for good lighting characteristics without noise of extinction for both natural and propane gas.
The ignition controller(s) shall be 100% shut-off with continuous retry.
The gas pressure shall be between 6-7" W.C for natural gas.
The solid state ignition system shall directly light the gas by means of a direct spark igniter each fires at 100% full fire based on a call for heat from a room thermostat.
An automatic reset high limit switch mounted in the air stream to shut off the gas supply in the event of overheating.
A time delay relay that delays the start of the air mover to allow the heat exchanger a warm-up period after a call for heat. The time delay relay shall also continue the air mover operation after the thermostat has been satisfied to remove any residual heat in the heat exchanger.
The unit must be field adjusted for 0-2000 feet elevation above sea level. See units installation manual for instruction for altitude adjustments.
Electrical
All electrical components shall carry UL, ETL, or CSA certification.
A low voltage terminal board shall be provided for direct wiring connection to an external thermostat.
A Contractor Convenience Package that consists of an external junction box featuring simple connection of supply power wiring internally, thermostat wiring to terminals externally, an On/Off switch, and status indicator lights to display the operational state of the unit shall be factory mounted on the rear panel of the casing.
A single 115V to 24V step down transformer shall be provided for all unit controls.
Air Mover
The motor horsepower shall be 1/3 H.P.
The motor wiring shall be in flexible metal BX conduit.
The motor shall be controlled by a time delay relay.
Propeller models shall meet the following requirements:
The motor type shall be Single-Speed, Totally Enclosed (TE).
The air mover motor shall be a 115V motor.
Mounting
The unit shall be equipped with tapped holes to accept 3/8”-16 threaded rod for suspension.
Propeller Unit to have two point adjustable suspension points to allow for level hanging with a variety of accessories.
Accessories
The following field installed accessory control devices shall be provided with the unit:
The gas fired unit heater(s) shall include ETL Listed and ETL Verified design certification for use in both the US and Canada to the ANSI Z83.8 - latest revision, standard for “Gas Unit Heater and Gas- Fired Duct Furnaces” for safe operation, construction, and performance.
Mechanical Configuration
Furnace(s) section with 82.0% minimum efficiency provided by an indirect-fired tubular heat exchanger with individually fired tubes for maximum heat transfer with minimal noise of flame ignition/extinction.
Venting Arrangement
The venting shall be a power exhausted arrangement. The unit shall be tested to insure proper ignition when the unit is subjected to 40 mile per hour wind velocities. The unit shall also include a factory mounted differential pressure switch designed to prevent main burner ignition until positive venting has been proven.
Unit Casing
The unit heater(s) casing shall be constructed of not less than 20 gauge aluminized steel with minimization of exposed fasteners.
All exterior casing parts shall be cleaned of all oils and a phosphate coating applied prior to painting. The exterior casing parts shall then be painted with an electrostatically applied baked-on gray-green polyester powder paint (7-mil thickness) for corrosion resistance.
The unit shall be furnished with horizontal air deflectors. The deflectors are adjustable to provide for horizontal directional airflow control (up or down).
Furnace Section
The heat exchanger(s) shall be made of 18 gauge aluminized steel tubes and headers.
The thermal efficiency of the unit(s) shall be a minimum of 82.0 efficient for all air flow ranges.
Each heat exchanger tube shall be individually and directly flame-fired. The heat exchanger tube shall be crimped to allow for thermal expansion and contraction. The flue collector box shall be made of 20 gauge aluminized steel.
The burner(s) shall be in-shot type, directly firing each heat exchanger tube individually and is designed for good lighting characteristics without noise of extinction for both natural and propane gas.
The ignition controller(s) shall be 100% shut-off with continuous retry.
The gas pressure shall be between 6-7" W.C for natural gas.
The solid state ignition system shall directly light the gas by means of a direct spark igniter each fires at 100% full fire based on a call for heat from a room thermostat.
An automatic reset high limit switch mounted in the air stream to shut off the gas supply in the event of overheating.
A time delay relay that delays the start of the air mover to allow the heat exchanger a warm-up period after a call for heat. The time delay relay shall also continue the air mover operation after the thermostat has been satisfied to remove any residual heat in the heat exchanger.
The unit must be field adjusted for 0-2000 feet elevation above sea level. See units installation manual for instruction for altitude adjustments.
Electrical
All electrical components shall carry UL, ETL, or CSA certification.
A low voltage terminal board shall be provided for direct wiring connection to an external thermostat.
A Contractor Convenience Package that consists of an external junction box featuring simple connection of supply power wiring internally, thermostat wiring to terminals externally, an On/Off switch, and status indicator lights to display the operational state of the unit shall be factory mounted on the rear panel of the casing.
A single 115V to 24V step down transformer shall be provided for all unit controls.
A Step-Down Transformer (Provided By Others) is required to operate the unit.
Air Mover
The motor horsepower shall be 1-1/2 H.P.
The motor wiring shall be in flexible metal BX conduit.
The motor shall be controlled by a time delay relay.
Blower models shall meet the following requirements:
The motor type shall be Totally Enclosed (TE).
The motor shall be rated for 115V/60Hz/1Ph.
The motor shall be provided with an adjustable motor sheave to allow for minor adjustment of the blower rpm at the job site.
The blower shall be a double width, double inlet (DWDI), forward curved, belt driven, assembly with spider ball bearings.
Mounting
The unit shall be equipped with tapped holes to accept 3/8”-16 threaded rod for suspension.
Blower unit to have 6 suspension points.
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