GAS SUPPLY (continued)
Pressure Testing of the Gas Supply System
1.To check the inlet pressure to the gas valve, a 1/8" (3 mm) N.P.T. plugged tapping, accessible for test gauge connection, must be placed immediately upstream of the gas supply connection to the appliance.
2.The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
3.The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa).
Attention! If one of the above procedures results in pressures in excess of 1/2 psig (14" w.c.) (3.5 kPa) on the appliance gas valve, it will result in a hazardous condition.
Checking Manifold Pressure
Both Propane and Natural have a pressure regulator attached to the gas valve. Natural gas models will have a manifold pressure of approximately 4.0" w.c. (.996 kPa) at the valve outlet with the inlet pressure to the valve from a minimum of 5.0" w.c. (1.245 kPa) for the purpose of input adjustment to a maximum of 10.5" w.c. (2.61 kPa). Propane gas models will have a manifold pressure approximately 10.0" w.c. (2.49 kPa) at the valve outlet with the inlet pressure to the valve from a minimum of 11.0" w.c. (2.739 kPa) for the purpose of input adjustment to a maximum of 13.0" w.c. (3.237 kPa).
A 1/8" (3 mm) N.P.T. plugged tapping, accessible for test gauge connection, is located on the side of the gas pressure regulator.
CLEARANCES
1.In selecting a location for installation, it is necessary to provide adequate accessibility clearances for servicing and proper installation.
2.Unit is supported by a wall bracket secured to the wall.
3.Theminimumclearancesfromcasingtocombustibleconstruction is 36" (914.4 mm) on top, 6" (152 mm) on each side and 4" (102 mm) from the floor or from the top surface of carpeting, tile or other floor covering and 0" (0 mm) to rear wall.
4.The minimum distance from the center of the vent cap to the nearest outside corner or obstruction is 24" (610 mm).
5. The minimum wall depth is 4 1/2" (114.3 mm) and the maximum is 12" (304.8 mm). The use of tubes not supplied by the manufacturer results in unsatisfactory performance.
The vent terminal of a direct vent appliance, with an input of 50,000 (14.6 KW) BTU per hour or less shall be located at least 9" (229 mm) from any opening through which flue gases could enter a building. The bottom of the vent terminal and the air intake shall be located at least 12" (305 mm) above grade.
The vent terminal of a direct vent appliance, with an input of 10,000 Btu per hour (3 kW) or less shall be located at least 6" (150 mm) from any air opening into a building, and such an ap- pliance with an input over 10,000 Btu per hour (3 kW) but not over 50,000 Btu per hour (14.7 kW) shall be installed with a 9" (229 mm) vent terminal clearance and the bottom of the vent ter- minal and the air intake shall be located at least 12" (305 mm) above grade.
WARNING: The nearest point of the vent cap should be a minimum horizontal distance of six (6) (1.83m) feet from any pressure regulator. In case of regulator malfunction, the six (6) foot (1.83m) distance will reduce the chance of gas entering the vent cap.
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