User Guide
8
MAY CAUSE IMPROPER OPERATION, FIRE OR EXPLOSION.
All piping must comply with local codes and ordinances or with the
National Fuel Gas Code NFPA 70 or the Natural Gas and Propane
Installation Code CAN/CSA B149.1, whichever applies.
REFER TO FIGURE 1 FOR CONNECTION DETAILS. BEFORE
ATTACHING THE GAS LINE BE SURE THAT ALL GAS PIPE IS
CLEAN ON THE INSIDE.
TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS
SUPPLY LINE, A DIRT LEG (SOMETIMES CALLED DRIP LEG)
MUST BE INCORPORATED IN THE PIPING, FIGURE. 1. The
dirt leg must be readily accessible. Install in accordance with
recommendations of serving gas supplier. Refer to the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 or the Natural Gas and
Propane Installation Code CAN/CSA B149.1.
To prevent damage, care must be taken not to apply too much
torque when attaching gas supply pipe to thermostat gas inlet. The
thermostat inlet has a pad for use with a backup wrench.
Apply joint compounds (pipe dope) sparingly and only to the
male threads of pipe joints. Do not apply compound to the rst
two threads. Use compounds resistant to the action of liqueed
petroleum gases. Do not use teon tape on thermostat ttings.
CONNECTION OF GAS PIPE
1. When connecting gas pipe to unit, apply wrench to ange only.
Note: Do not use wrench on gas valve or gas valve bracket.
2. PERFORM THE GAS LEAK TEST ANY TIME WORK IS DONE
ON A GAS SYSTEM TO AVOID THE POSSIBILITY OF FIRE
OR EXPLOSION WITH PROPERTY DAMAGE, PERSONAL
INJURY, OR LOSS OF LIFE.
The Gas Leak Test is performed as follows: Paint pipe
connections upstream of gas control with a rich soap and water
solution to test for leaks before operating main burner. Bubbles
indicate gas leak. To stop leak, tighten pipe connections.
After piping connections are checked, turn on main burner.
(See Lighting and Operating Installations in this manual or on
water heater.) With main burner in operation, paint pipe joints
(including anges) and control inlet and outlet with rich soap
and water solution. Bubbles indicate gas leak. To stop leak,
tighten ange screws, joints and pipe connections. Replace
part if leak can't be stopped.
DISCONNECT THE APPLIANCE AND ITS INDIVIDUAL SHUT
OFF VALVE FROM THE GAS SUPPLY PIPING SYSTEM
DURING ANY SUPPLY PRESSURE TESTING EXCEEDING
1/2 PSI (3.5 kPa). GAS SUPPLY LINE MUST BE CAPPED
WHEN DISCONNECTED FROM THE HEATER. FOR TEST
PRESSURES AT 1/2 PSI (3.5 kPa) OR LESS, THE APPLIANCE
NEED NOT BE DISCONNECTED, BUT MUST BE ISOLATED
FROM THE SUPPLY PRESSURE TEST BY CLOSING THE MAIN
MANUAL GAS VALVE.
BEFORE PLACING THE HEATER IN OPERATION, CHECK
FOR GAS LEAKAGE. USE SOAP AND WATER SOLUTION OR
OTHER MATERIAL ACCEPTABLE FOR THIS PURPOSE. DO
NOT USE MATCHES CANDLES, FLAME OR OTHER SOURCES
OF IGNITION TO LOCATE GAS LEAKS.
RELIEF VALVE
A NEW TEMPERATURE AND PRESSURE RELIEF VALVE
COMPLYING WITH THE STANDARD FOR RELIEF VALVES
AND AUTOMATIC GAS SHUT OFF DEVICES FOR HOT WATER
SUPPLY SYSTEMS, ANSI Z21.22-CSA 4.4 MUST BE INSTALLED
IN THE HEATER IN THE MARKED OPENING PROVIDED. THE
VALVE MUST BE OF A SIZE (INPUT RATING) THAT WILL BE
ADEQUATE FOR YOUR SIZE HEATER.
Check the metal tag on the relief valve and compare it to the heater’s
rating plate. The pressure rating of relief valve must not exceed the
working pressure shown on the rating plate of the heater. In addition
the hourly Btu rated temperature steam discharge capacity of the relief
valve shall not be less than the input rating of the heater. NO VALVE
IS TO BE PLACED BETWEEN THE RELIEF VALVE AND TANK. DO
NOT PLUG THE RELIEF VALVE.
The drain line connected to this valve must not contain a reducing
coupling or other restriction and must terminate near a suitable
drain to prevent water damage during valve operation. The
discharge line shall be installed in a manner to allow complete
drainage of both the valve and line. DO NOT THREAD, PLUG
OR CAP THE END OF THE DRAIN LINE.
VENTING
WARNING
NEVER OPERATE THE HEATER UNLESS IT IS VENTED TO
THE OUTDOORS AND HAS ADEQUATE AIR SUPPLY TO AVOID
RISKS OF IMPROPER OPERATION, FIRE, EXPLOSION OR
ASPHYXIATION.
VENT PIPE TERMINATION
The rst step is to determine where the vent pipe will terminate.
See Figures 3, 8 and 9. The vent may terminate through the roof as
shown in Figure 9 or through a sidewall as shown in Figure 8.
IMPORTANT
The vent system must terminate so that proper clearances are
maintained as cited in local codes or the latest edition of the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the Natural
Gas and Propane Installation Code CAN/CSA-B149.1.
For your convenience instructions on proper installation through
a sidewall are provided in Figure 3.
The manufacturer also recommends that the vent system
termination not be installed closer than 3 feet (91 cm) from an
inside corner of an L shaped structure and not be less than 1 foot
(30 cm) above grade. The vent shall terminate a minimum of 12"
(30 cm) above expected snowfall level to prevent blockage of
vent termination.
Plan the vent system layout so that proper clearances are
maintained from plumbing and wiring.
Vent pipes serving power vented appliances are classied by
building codes as "vent connectors". Required clearances from
combustible materials must be provided in accordance with
information in this manual under LOCATION OF HEATER and
INSTALLATION OF VENT SYSTEM, and with the National Fuel