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.).
If the heater needs to be secured to the ground, use
the hole pattern shown in Fig. 5, following local codes.
Additional clearance may be required when using the
factory anchor bracket.
Clearances
For ease of servicing, provide a minimum clearance of
at least 24 in. on the right side, 24 in. in front, at least
36 in. on the rear and 10 in. above the top of the
heater. This will allow the heater to be serviced in its
installed location without movement or removal of the
heater.
Indoor Installations
Service clearances less than the minimum may
require removal of the heater to service either the heat
exchanger or the burner components. 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.
8
Table C: Clearances – Indoor Installations
INSTALLATION
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
Automatically Fired Boilers, ANSI/ASME CSD-1,
(CSD-1) when required
•
For Canada only: CAN/CSA B149 Natural Gas
and Propane Installation Code and CSA C22.1
C.E.C. Part 1 (C22.1)
CAUTION:
This heater should be located in an
area where water leakage will not result in damage
to the area adjacent to the appliances or to the
structure. When such locations cannot be avoided, it
is recommended that a suitable catch pan,
adequately drained, be installed under the
appliance. The pan must not restrict air flow.
Fig. 5: Anchor Hole Locations
*DO NOT install on carpeting.
Heater
Side
Minimum Clearance
from Combustible
Surfaces
Minimum
Service
Clearance
Floor*
0”
0”
Rear
12”
36”
Right Side
1”
24”
Left Side
1”
1”
Top
0”
10”
Front
Open
24”
Vent
1”
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 enclosed parking garages must be located at least
18 in. above the floor.
