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5
PROPANE SUPPLY
Where used with propane (LP gas) a separate correct
propane regulator must be installed at propane tank to deliver
propane to BOSCH regulator at 11’’ W.C. pressure.
Figure 4
Check to make sure that the gas listed on the rating plate is
same as gas listed on the pressure regulator. See PRESSURE
REGULATION section of this manual for information
regarding gas pressure settings.
Note: Before attaching the gas supply 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 must
be incorporated in the piping. The drip leg must be
readily accessible and not subject to freezing
conditions. Install in accordance with
recommendations of serving gas supplier.
Joint compounds (pipe dope) shall be applied sparingly and
only to the male threads of pipe joints. Do not apply
compound to the first two threads. The joint compound used
must be resistant to the action of liquified petroleum gases.
Before placing water heater in operation check for gas
leakage.
Soap and water solution, or other material acceptable for
this purpose, shall be used in locating gas leaks. Matches,
candles, lighters, or other ignition sources shall not be used
for this purpose.
WARNING
The heater 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
3,45 KPa (½ psig).
The water heater 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 3,45 KPa (½ psig).
The water heater, including the pressure regulator and
manual valve provided with it, must not be operated at gas
supply pressures in excess of 3,45 KPa (½ psig).If
overpressure has occurred such as through improper testing
of the gas lines or emergency malfunction of the supply
system, the gas valve and regulator must be checked for
safe operation. Make sure that the outside vent valves are
protected against blockage. These are part of the gas supply
system, not the water heater. Vent blockage may occur during
ice storms.
Figure 3
PRESSURE TAP
PRESSURE REGULATOR
MANUAL GAS VALVE