Harman Stove Company HB 38 DV - Manual (Page 19)

19
INSTALLATION
Only For Qualified Installers
Burn Only the Fuel for which the Heater is
Equipped
The Serenity III Direct Vent will burn either
natural gas or propane, but requires a change over
kit for propane. The label on the burner system mod-
ule indicates the fuel for which it is equipped. A sec-
ond label, (on the valve) also indicates the fuel type.
Making The Connection
The gas inlet is located on the bottom right side
of the fireplace. The inlet fitting is a 3/8" female
flare flexible pipe.
A separate gas shut-off valve and a 1/8" N.P.T.
plugged tapping should be installed immediately up-
stream of the connection to the appliance.
The Serenity III Direct Vent Gas Heater must
be disconnected from the gas supply piping during
any pressure testing of that system at pressures in
excess of 1/2 psig (3.5 kPa).
The Serenity III gas control valve must be in
the OFF position during any pressure testing of the
gas supply system at pressures equal to or less than
1/2 psig (3.5 kPa).
WARNING: To avoid pipe compounds from
entering into the gas train, apply compounds only
to male pipe threads and do not apply compound
to the first two threads.
CAUTION: TEST ALL JOINTS FOR LEAKS
BEFORE OPERATING.
Gas Pressure Requirements:
Correct gas pressure and the use of a properly
sized gas supply line are essential for the safe and
efficient performance of this appliance. Make sure
that the plumber or gas supplier checks the gas sup-
ply line and gas pressure at installation.
NOTE: Improper gas pressure can affect heater
performance, flame color, or cause pilot outage.
Natural Gas:
Maximum inlet pressure 7.0" w.c. (1.74 kPa)
Minimum in let p res su re 5.0" w.c. (1.25 kPa)
Gas manifold pressure 3.5" w.c. (0.87 kPa)
LPG Gas:
Maximum inlet pressure 13" w.c. (3.24 kPa)
Min im um inlet p ress ure 11" w.c. (2.74 kPa)
Gas manifold pressure 10" w.c. (2.49 kPa)
DO NOT USE THIS HEATER IF ANY PART
HAS BEEN UNDER WATER OR EXPOSED TO
MOISTURE C OR ROSION. IMMEDIATELY
CALL A QUALlFlED SERVICE TECHNICIAN TO
INSPECT THE HEATER AND REPLACE ANY
PART OF THE CONTROL SYSTEM AND ANY
GAS CONTROL WHICH HAS BEEN UNDER
WATER.
Pipe Length Schedule 40 Pipe Tubing, Type L
(Feet) Inside Diameter Outside Diameter
N.G. L.P. N.G. L.P.
0-10 1/2" 3/8" 1/2" 3/8"
1.3 cm 1.0 cm 1.3 cm 1.0 cm
10-40 1/2" 1/2" 5/8" 1/2"
1.3 cm 1.3 cm 1.6 cm 1.3 cm
40-100 1/2" 1/2" 3/4" 1/2"
1.3 cm 1.3 cm 1.6 cm 1.3 cm
100-150 3/4" 1/2" 7/8" 3/4"
2.0 cm 1.3 cm 2.3 cm 2.0 cm
RECOMMENDED GAS PIPE DIAMETER
NOTE: NEVER USE PLASTIC PIPE. CHECK TO CONFIRM
WHETHER YOUR LOCAL CODES ALLOW COPPER
TUBING OR GALVANIZED PIPE.