In addition, the heater shall be installed such that the gas ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation or service (circulator replacement, control replacement, etc.).
Clearances
Indoor Installations
Heater | Minimum Clearance | Recommended | |
from Combustible | Service | ||
Side | |||
Surfaces | Clearance | ||
| |||
|
|
| |
Floor* | 0” | 0” | |
|
|
| |
Rear | 1” | 24” | |
|
|
| |
Water Side | 12” | 24” | |
|
|
| |
Other Side | 1” | 24” | |
|
|
| |
Top | 1” | 1” | |
|
|
| |
Front | Open | 24” | |
|
|
| |
Vent | 2” | 2” | |
|
|
|
* DO NOT install on carpeting.
Table E: Clearances – Indoor Installations
TOP VIEW
FRONT VIEW
Venting not shown for clarity. Heater must be vented
per instructions in this manual
Fig. 7: Minimum Clearances from Combustible
Surfaces – Indoor Installations
When installed according to the listed minimum clear- ances from combustible construction, these heaters can still be serviced without removing permanent structural construction around the heater. However, for ease of servicing, we recommend a clearance of at least 24 in. in front, and at least 12 in. on the water connection side. This will allow the heater to be serv- iced in its installed location without movement or removal of the heater.
Service clearances less than the minimums may require removal of the heater to service either the heat exchanger or the burner tray. In either case, the heater must be installed in a manner that will enable the heater to be serviced without removing any structure around the heater.
Outdoor Installations
These heaters are
| Heater | Min. Clearance | Recommended |
|
| from Combustible | Service |
| |
| Side |
| ||
| Surfaces | Clearance |
| |
|
|
| ||
|
|
|
|
|
| Front | Open | 24” |
|
|
|
|
|
|
| Rear | 12” | 24” |
|
|
|
|
|
|
| Water Side | 36” | 36” |
|
|
|
|
|
|
| Other Side | 36” | 36” |
|
|
|
|
|
|
| Top | Unobstructed | Unobstructed |
|
|
|
|
|
|
| Vent | N/A | N/A |
|
|
|
|
|
|
Table F: Clearances – Outdoor Installations
These clearances are required when the outdoor vent cap is used. If installing the heater outdoors with a vent stack, the indoor clearances may be utilized.
The combustion air intake hood MUST be used for outdoor installations. The hood is shipped loose and installed on the side of the heater over the filter box at the jobsite.
11
