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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.
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 brackets that were used to bolt the heater to the
shipping pallet.
Clearances
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, at least 24 in. on the rear and 10
in. above the top of the heater. This will allow the
8
Heater
Side
Minimum Clearance
from Combustible
Surfaces
Recommended
Service
Clearance
Floor* 0” 0”
Rear 12” 24”
Right
Side
1” 1”
Left Side 1” 1”
Top 0” 10”
Front Open 24”
Vent 1” 1”
Table C: Clearances – Indoor Installations
INSTALLATION
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)
The temperature of the water in the heater can be reg-
ulated by using the Raypak Modulating Temperature
Control. To comply with safety regulations, the control
is set at 120°F when shipped from the factory (Mode 3
default setting for Tank Target).
To adjust the water temperature, follow the instruction
for the operation of the control starting on page 30 of
this manual. The control is shown below for identifica-
tion purposes only. (See Fig. 4.)
CAUTION: Hotter water increases the risk of
scalding! There is a hot water scald potential if the
thermostat is set too high.
Fig. 4: Modulating Temperature Control
*DO NOT install on carpeting.
CAUTION: The 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.