Gas Connection; Gas Conversion - Monitor GF3800 Servise Manual

MONITOR HEATING SYSTEM
Section 2: Installation
2-5 GAS CONNECTION
1. The gas supply line shall be gas-tight, sized
and so installed as to provide a supply of gas
sufficient to meet the maximum demand of the
heater without loss of pressure.
2. The gas line should be installed with enough flexibility
to allow the heater to be moved from the wall for
maintenance. Check local codes for use of flex hose.
3. A shut off valve should be installed in the
upstream of the gas line to permit servicing.
4. Flexible pipe and any appliance connector
valve used for gas piping shall be types
approved by nationally recognized agencies.
5. Any compound used on the threaded joint of
the gas piping shall be a type which resists the
action of liquefied petroleum gas.
6. Supplied gas pressure must be within the
limits shown in the specifications.
7. After completion of gas connections, all joints
including those at the heater must be checked
for gas-tightness by means of leak detector
solution, soap and water, or an equivalent
nonflammable solution, as applicable.
A CAUTION: Since some leak test solutions,
including soap and water, may cause
corrosion or stress cracking, the piping shall
be rinsed with water after testing, unless it
has been determined that the leak test
solution is noncorrosive.
8. The appliance and its individual shut off valve
must be disconnected from the gas supply
piping system during any pressure testing of
that system at test pressure in excess of 1/2
psi. (3.5KPa).
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 system at test
pressure equal to or less than 1/2 psi.(3.5KPa).
9. A 1/8" test plug is provided for testing of
manifold pressure see schematic for location
(page 64,69)
At time of installation installer must supply a
1/8" N.P.T. plugged tapping, accessible for
test gauge connection, immediately upstream
of the gas supply connection of the
appliance.
10. The minimum and maximum inlet gas supply
pressure are for the purpose of input
adjustment.
2-6 GAS CONVERSION
During the gas conversion or if replacing the
Automatic Gas Valve Unit, do NOT pull out
the two(2) blue wires from the Gas Control
Valve connectors, once the manifold pressure
has been set. If wires have to be
disconnected be sure to reconnect these lead
wires onto there original connectors.
If these lead wires are reversed the manifold
pressure setting will be slightly out of
adjustment.
If unsure which connectors the lead-wires
should be connected to, connect them to the
Gas Control valve, and then reset the
manifold pressures.
Gas Inlet
'/2" Threaded connection
Gas Piping
Manual Gas Valve
Figure 2-7
Gas Control Valve
Lead-wires
20