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Installation Codes
Installations must follow these codes:
• Local, state, provincial, and national codes, laws,
regulations and ordinances
• National Fuel Gas Code, ANSI Z223.1/NFPA 54 –
latest edition (NFGC)
• National Electrical Code, ANSI/NFPA 70 - latest
edition (NEC)
• Standard for Controls and Safety Devices for Auto-
matically Fired Boilers, ANSI/ASME CSD-1,
(CSD-1) when required
• For Canada only: CAN/CSA B149.1 Natural Gas
and Propane Installation Code and CSA C22.1
C.E.C. Part 1 (C22.1)
Equipment Base
The heater should be mounted on a level, structurally
sound surface. The heater is approved for installation
on a combustible surface but must NEVER be installed
on carpeting. Gas-fueled equipment installed in en-
closed parking garages must be located at least 18 in.
above the floor.
When such locations cannot be avoided, it is recom-
mended that a suitable catch pan, adequately drained,
be installed under the appliance. The pan must not re-
strict air flow.
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
Minimum Clearance
Heater
from Combustible
Side
Surfaces
Floor*
Rear
Right Side
Left Side
Top
Front
Vent
* DO NOT install on carpeting.
Table C: Clearances – Indoor Installations
7
SECTION C: Installation
SECTION C
Installation
Recommended
Service
Clearance
0"
0"
12"
24"
1"
1"
1"
1"
0"
10"
Open
24"
1"
1"
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