To prevent damage, care must be taken not to apply too much torque when attaching gas supply pipe to gas valve inlet. The thermostat inlet has a pad for use with back up wrench.
Apply joint compounds (pipe dope) sparingly and only to the male threads of pipe joints. Do not apply compound to the first two threads. Use compounds resistant to the action of liquefied petroleum gases. Do not use teflon tape on gas valve fittings.
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 SOAPAND 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 (P)-FIG. 1
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 (CURRENT EDITION) 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.
Make sure the flue baffle and flue restrictor ring are properly aligned and inserted on top of the flue. This can be checked through the dilution air inlet of the blower.
VENT PIPE TERMINATION
NOTE: Before installing power venter determine place of vent pipe termination. See figure 3 on page 7.
IMPORTANT
The vent system must terminate so that proper clearances are maintained as cited in local codes or the current edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, 7.3.4e and 7.8a,b, as follows:
1.The exit terminals of a mechanical vent system shall be not less than 7 feet above grade when located adjacent to public walkways. (Figure. 3)
2.A venting system shall terminate at least 3 feet above any forced air inlet located within 10 feet. (Figure 3)
3.The venting system shall terminate at least 4 feet below, 4 feet horizontally from or, 1 foot above any door, window or gravity air inlet into any building.
The manufacturer also recommends that the vent termination should not be installed closer than 3 feet from an inside corner of an L shaped structure and not be less than 1 foot above grade.
The vent shall terminate a minimum of 12'' above expected snowfall level to prevent blockage of vent termination.
4.In cold climates, it is recommended that vent termination not be mounted directly above or within 3 feet horizontally from an oil tank vent or gas meter to avoid potential freeze-up from condensation.
Plan the vent system layout so that proper clearances are maintained from plumbing and wiring.
Vent pipes serving power vented appliances are classified 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 VENT TERMINAL INSTALLATIONS, and with the National Fuel Gas Code and local codes.
IMPORTANT
Plan the layout of the vent system from the vent termination to the appliance considering all of the 90 degree and 45 degree elbows plus the number of feet of pipe that would be needed to install the total vent system. Make sure to include the 90 degree elbow if required at the blower. Review the tables on page 9 to make sure that the vent system is within the allowed vent configuration. Multiple fittings, 90 or 45 degree, installed in close proximity to each other could result in intermittent lockouts or prevent the unit from firing. Plan the layout to locate the fittings as far apart as possible.
CAUTION
Termination of the vent system with a device other than the 2",
22.50degree schedule 40 elbow (supplied with the unit) or a 3", 45 degree schedule 40 elbow (supplied locally) could affect the system performance and result in a safety hazard. If the 3" elbow is used for the vent terminal, then the screens (supplied with this unit) for those elbows must be used and installed according to the provided instructions.
VENT TERMINAL INSTALLATION
1.After the point of termination has been determined, use the cover plate as a template to mark the hole for the vent pipe to insert through the wall. BEWARE OF CONCEALED WIRING AND PIPING INSIDE OF WALL.
2.If the Vent Terminal is being installed on the outside of a finished wall, it may be easier to mark both the inside and outside wall. Align the holes by drilling a hole through the center of the template from the inside through to the outside. The template can now be positioned on the outside wall using the drilled hole as a centering point for the template.
