Installation must be in accordance with local codes, or, in the absence of local codes, with the latest edition of the National Fuel Gas Code, ANSI Z223.1 and National Electrical Code, ANSI/NFPA 70.
BASE INSTALLATION
Heater must be mounted on a level base, such as cement slab, cement blocks or other
CLEARANCES
ALL HEATERS
For clearances from combustible surfaces, see the chart below
CLEARANCE FROM COMBUSTIBLE
CONSTRUCTION
INDOORINSTALLATIONS:
Top* (Drafthood) - 36" Back - 10"
Front - Alcove Right Side 6"
Vent - 6"Left Side (Water Side) 6"
OUTDOORINSTALLATION:
Top* (Stackless Top) - Unobstructed
Back - 10" Side - 6"
12"
Minimum
4" 
Minimum
12"
Minimum
Sheet Metal
24 Gauge
Fig. # 8148.0
*Clearance from top of vent terminal.
*For servicing, provide at lease 24" in front of the heater for burner tray removal, and at least 18" on water connection side of the heater to inspect and delime the heat exchanger.
Hollow Concrete Cinder Block, Align Holes And Leave
Ends Open. Alternative Method For Providing A Non-
Combustible Base.
OUTDOOR HEATERS
These heaters are design certified for outdoor installation, when equipped with the approved tops designated for outdoor use.
Heaters must not be installed under an overhang of less than three (3) feet from the top of the heater. Three
(3)sides must be open in the area under the overhang. Roof water drainage must be diverted away from the heaters installed under overhangs with the use of gutters.
WARNING: The heater shall not be located in an area where water sprinklers, or other devices, may cause water to spray through the cabinet louvers and into the heater. This could cause heavy internal rusting or damage some electrical components, and this would void the warranty.
The point from where the flue products exit the heater must be a minimum of four (4) feet below, four (4) feet horizontally from or one (1) foot above any door, window or gravity inlet to a building. The top surface of the heater shall be at least three (3) feet above any forced air inlet, or intake ducts located within ten (10) feet horizontally.
4 foot |
|
Minimum |
|
| 4 foot |
| Minimum |
4 foot |
|
Minimum |
|
3 foot |
|
Minimum |
|
10 foot | 1 foot |
Minimum | |
Minimum |
|
Forced Air Inlet | Fig. # 8245.0 |
| |
| 8 |
HIGH WIND CONDITIONS
(OUTDOORUNITSONLY)
In areas where high winds are fre- quent, it may be necessary to locate the heater a minimum of 3' from high vertical walls, or install a wind break so the heater is not in direct wind current.
