Installation; Installation Codes; Equipment Base; Clearances - Raypak HD401 Installation & Operating Instructions Manual

Raypak offers several optional temperature controllers
for regulation of the water temperature in the heater.
Type H models 101 through 301 are equipped as stan-
dard with an onboard operating controller to provide
reset of the water temperature based on outdoor air
temperature. To comply with safety regulations, the
temperature controller will be set at the lowest setting
when shipped from the factory.
To adjust the water temperature, insert a small straight
screwdriver into the adjustment wheel on the front of
temperature control and turn the wheel to the desired
setting (See Fig. 6).
Fig. 6: Temperature Controller
CAUTION: Hotter water increases the risk of scald-
ing! There is a hot water scald potential if the
thermostat is set too high.

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- latest edi-
tion (NFGC).
· National Electrical Code, ANSI/NFPA 70 - latest
edition (NEC).
· Standard for Controls and Safety Devices for
Automatically Fired Heaters, ANSI/ASME CSD-1,
when required (CSD-1).
· For Canada only: CAN/CGA B149 Installation
Code (B149) and C.S.A. 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 enclosed parking garages must be located at least
18 in. above the floor.
CAUTION: The heater should be located in an area
where water leakage will not result in damage to the
area adjacent to the appliance 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.
ADJUSTMENT
WHEEL
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.).
WARNING: This product must be installed by a
licensed plumber or gas fitter when installed within
the Commonweatlh of Massachusetts.

Clearances

Indoor/Closet Installations
Heater Side
Front
Rear
Floor*
Top
Left**
Right**
Water Side
*DO NOT install on carpeting.
**When water connections are on other side.
Table C: Combustible Clearances — Indoor/Closet
9
Minimum Installed
Combustible Clearance
24"
2"
0"
24"
12"
6"
24"
Installations