Residential Gas Hydronic Heating System
Residential Gas Hydronic Heating System
Residential Gas Hydronic Heating System
Residential Gas Hydronic Heating System
QVM 9
Series
16
16
16
16
Gas Piping Connections
Gas Piping Connections
Gas Piping Connections
Gas Piping Connections
Do not increase the gas
pressure above the specified
level.
This may cause damage
to the boilers and even fire.
Check for any gas leaks
before starting the boiler.
Rubber or
Rubber or
Rubber or
Rubber or
plastic pipe
plastic pipe
plastic pipe
plastic pipe
for gas should
for gas should
for gas should
for gas should
not be used.
not be used.
not be used.
not be used.
When local codes require a main manual shut-off valve
outside the boiler jacket, a suitable main manual shut-off
valve must be installed in a location complying with those
codes.
It is important to guard against gas valve fouling from
contaminants in the gas piping. Such fouling may cause
improper operation, fire or explosion. If copper supply lines
are used they must be approved for gas service.
Before attaching the gas 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 (sometimes called drip leg)must be incorporated in
the piping. The dirt leg must be readily accessible and not
subject to freezing conditions. Install in accordance with
recommendations of gas supplier. Refer to national fuel
gas code, ANSI Z223.1 or CAN/CGA-B149.1 or B149.2
(most recent edition).
■
Gas piping for boiler should be connected to the main
gas line and should not be shared by other gas
appliances.
■
Use metal pipe or metal flexible pipe which has been
approved for use with gas and be sure to install the
shut off valve.
■
If propane gas is in use, the care should be exercised
for the following :
-
Use a household regulator for propane gas with
the capacity matching to the indicated gas
consumption of the unit.
-
Install two or more 110 lbs propane gas cylinder
(Manifold cylinders together).
This boiler is not intended to operate at gas supply
pressures other than those shown on the rating plate.
Exposure to higher gas supply pressure may cause
damage to gas valves, which can result in fire or
explosion. If overpressure has occurred, such as through
improper testing of gas lines or emergency malfunction
of the supply system, the gas valves must be checked
for safe operation. Make sure that the outside vents on
the supply regulators and the safety vent valves are
protected against blockage. These are parts of the gas
supply system, not the boiler. Vent blockage may occur
during ice build-up or snow storms.
