Table of Contents
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Table of Contents
HED Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CSA Requirements in USA . . . . . . . . . . . . . . . . . . . . . . . . 4
CSA Requirements in Canada . . . . . . . . . . . . . . . . . . . . . 4
Additional Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 4
Unit Heater Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Combustion and Ventilation Air . . . . . . . . . . . . . . . . . . 5
Rotation of Combustion Air Inducer . . . . . . . . . . . . . . . . . 6
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Typical HED Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . 10
Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Be sure to read and understand the
installation,
operation
instructions in this manual.
Improper installation, adjustment, alter-
ation, service or maintenance can cause
serious injury, death or property damage.
Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
Installation and service must be per-formed
by a qualified installer, service agency or
the gas supplier.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exact-ly
could result in serious injury, death, or
property damage.
WHAT TO DO IF YOU SMELL GAS:
and
service
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the fire
department.
INSTALLATION
INSTRUCTIONS
HED
75,000 to 300,000 Btuh Series
DUCT HEATERS
IM-HED-0652455-08
October 2017
Supersedes IM-HED-0652455-07
Unit Start−Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
To Turn Off Gas to Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Heating Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 13
Ignition Control LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
High Altitude Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Gas Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Gas Pressure Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Limit Control Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Combustion Air Pressure Switch . . . . . . . . . . . . . . . . . . . . . . 14
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start−Up and Performance Checklist . . . . . . . . . . . . . . . . . . 16
Template . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS 75,000 to 300,000 Btuh Series DUCT HEATERS IM-HED-0652455-08 October 2017 Supersedes IM-HED-0652455-07 Table of Contents HED Unit Dimensions ......2 Unit Start−Up . -
Page 2: Hed Unit Dimensions
HED Unit Dimensions * NOTE: Two rivet nuts are furnished on HED models 75, 100, 125 and 150. Four rivet nuts are furnished on HED models 200, 250 and 300 Additional 3/8-16 rivet nuts for unit suspension (furnished on HED models 200, 250 and 300. -
Page 3: Optional Accessories
CSA Requirements in USA building codes or, in the absence of local codes, with the current edition of CSA-B149 installation compliance Installation of gas duct heaters must conform with local codes. All electrical wiring and grounding for the unit building codes or, in the absence of local codes, with the must also comply with the current edition of CSA current edition of ANSI−Z223.1, National Fuel Gas Code. -
Page 4: Csa Requirements In Usa
3 − Heaters should be located so that they are SINGLE BLOWER APPLICATION protected from damage from aircraft or other (Top View) appliances needed for servicing of aircraft. Refer TRANSITION to requirements of the enforcing authorities. In a confined area, the heater must be installed in HED UNIT BLOWER accordance with the current edition of CSA-B149... -
Page 5: Combustion And Ventilation Air
On HED models 75, 100, 125 and 150, mounting nuts NOTE − It is not permissible to rotate the combustion are furnished at the balance point (two positions only). air inducer on HED models −200, −250 and −300. On HED models 200, 250 and 300, mounting nuts are Rotate the combustion air inducer assembly as follows: furnished at each corner of the unit. -
Page 6: Rotation Of Combustion Air Inducer
Venting 2 − Keep the vent connector runs as short as possible with a minimum number of elbows. Refer to the NOTE − The vent is a passageway, vertical or nearly current edition of ANSI Z223.1 or CSA-B149 so, used to convey flue gases from an appliance, or its installation compliance codes for maximum vent vent connector, to the outside atmosphere. - Page 7 VENT TERMINATION ON SINGLE−WALL VERTICAL VENT RUNS SINGLE−WALL VENT PIPE WITH SINGLE−WALL VENT PIPE WITH SINGLE−WALL TERMINATION DOUBLE−WALL (TYPE B−1) TERMINATION ROOF FLASHING ROOF FLASHING ROOF PITCHED FROM 0" TO 45" ROOF PITCHED FROM 0" TO 45" 12" MAX CLEARANCE TO BE 2”...
- Page 8 7 − Vent termination must be a minimum of 6 feet (1.83 12 − Select a wall termination point that will maintain m) from an inside corner formed by two exterior 1/4" rise per foot slope of horizontal run of vent walls.
- Page 9 CONDENSATE DRAIN THROUGH TEE PIPE AND DRAIN LOOP DOWNWARD SLOPE ON HORIZONTAL VENT Venting may be single−wall (26 GSG) galvanized or equivalent stainless steel vent pipe sealed per these instructions, OR TEE PIPE listed special vent for Category SECTION 12 INCHES III appliances.
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Page 10: Electrical Connections
The HED series duct heaters use a direct spark ignition NOTE − Electrically ground unit in accordance with local system. There is no pilot necessary as the spark lights the codes or, in the absence of local codes, in accordance main burner as the gas valve is turned on. -
Page 11: Gas Connection
The appliance must be isolated from the gas supply Gas Connection piping system by closing its individual manual gas shutoff valve during any pressure testing of the gas When connecting gas supply, the length of the run from supply system at test pressures equal to or less than 1/2 psig (3.45kPa). - Page 12 6 − Wait five minutes to clear out any gas. If you then WARNING smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you do not smell gas, go Electric shock hazard. Can cause injury Electric shock hazard.
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Page 13: To Turn Off Gas To Unit
To Turn Off Gas to Unit 9 − The ignition control will de-energize the ACC terminals approximately 150 seconds after the gas valve is de-energized. 1 − Set thermostat to lowest level. Ignition Control LED 2 − Turn off all electrical power to unit if service is to The ignition control contains a green LED which be performed. -
Page 14: Gas Flow
Gas Flow Service IMPORTANT To check for proper gas flow to the combustion chamber, determine the Btu input from the appliance rating plate. Divide this input rating by the Btu per cubic Turn off gas and electrical power to unit before per- forming any maintenance or service operations on feet of available gas. - Page 15 FLUE PASSAGEWAY AND FLUE BOX FAILURE TO OPERATE The flue passages and flue box should be inspected If unit fails to operate check the following: and cleaned prior to each heating season. The 1 − Is thermostat calling for heat? sequence of operation should be as follows: 2 −...
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Page 16: Start−Up And Performance Checklist
START−UP AND PERFORMANCE CHECKLIST Job Name: Job No.: Date: Job Location: City: State/Province: Installer: City: State/Province: Unit Model No.: Serial No.: Service Technician: Electrical Connections Tight? Air Shutters Properly Adjusted (If Installed)? Supply Voltage Flue Connections Tight? Blower Motor Lubrication O.K.? Gas Piping Connections Tight &... -
Page 17: Template
TEMPLATE Location of Combustion Air Inducer Mounting Holes for Rotated Inducer EXISTING HOLE EXISTING HOLE EXISTING HOLE... -
Page 18: Warranty
ADP, at its option, will furnish a replacement heat exchanger or allow a credit (in the amount of the heat exchanger original selling price) toward the purchase of a new ADP unit heater. No extended coverage granted for HED series heat exchangers.
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