INSTALLATION
INSTRUCTIONS
FOA
40,000 to 125,000 Btuh Series
SEPARATED COMBUSTION
UNIT HEATERS
IM-FOA-45-125-0653334-08
April 2018
Supersedes 065333407
Table of Contents
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Optional Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CSA Requirements in USA . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CSA Requirements in Canada . . . . . . . . . . . . . . . . . . . . . . . . . 4
Additional Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unit Heater Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Combustion and Ventilation Air . . . . . . . . . . . . . . . . . . . . . . . 6
Exhaust Vent and Combustion Air Inlet . . . . . . . . . . . . . . . . . 6
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Typical Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Unit Start−Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
To Turn Off Gas to Unit . . . . . . . . . . . . . . . . . . . . . . . . . 17
Heating Sequence of Operations . . . . . . . . . . . . . . . . . . 17
Ignition Control LED . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
High Altitude Adjustments . . . . . . . . . . . . . . . . . . . . . . . 17
Gas Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Gas Pressure Adjustments . . . . . . . . . . . . . . . . . . . . . . . . 18
Limit Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Louver Vane Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 18
Combustion Air Pressure Switch . . . . . . . . . . . . . . . . . . 18
Flame Rollout Switch . . . . . . . . . . . . . . . . . . . . . . . . . .
18
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Start−Up and Performance Checklist . . . . . . . . . . . . . . . 19
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
Be sure to read and understand the installation,
operation and service instructions in this manual.
Improper installation, adjustment, alteration, 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 performed by a
qualified installer, service agency or the gas
supplier.
WHAT TO DO IF YOU SMELL GAS:
•
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.
