Connecting The Gas - Martin VENT-FREE FIREPLACE SYSTEMS 33ISDG Installation And Operating Instructions Manual

CONNECTING THE GAS

NOTICE: A qualifi ed gas appliance installer must connect the heater to the gas supply. Consult all
local codes.
Use new black or steel pipe. Internally tinned copper or copper tubing can be used
per National Fuel Code, section 2.6.3, providing gas meets hydrogen sulfi de limits,
and where permitted by local codes. Gas piping system must be sized to provide
minimum inlet pressure (listed on Data Plate) at the maximum fl ow rate (BTU/Hr).
Undue pressure loss will occur if the pipe is too small.
A manual shutoff valve must be installed upstream of the appliance. Union tee
and plugged
appliance. See Figure 17.
To Heater
Valve
Stainless
Flexible Tube
IMPORTANT: Loosen the pipe adapter on the fl ex tube before installing to the system piping.
CHECK GAS TYPE: The gas supply must be the same as stated on the heater's rating
plate. If the gas supply is different, DO NOT INSTALL THE HEATER. Contact your
dealer for the correct mode.
Always use an external regulator for all propane/L.P.G. heaters and high pressure one to two-pound systems only, to
reduce the supply tank pressure to a maximum of 13" w.c. This is in addition to the internal regulator in the heater valve.
16
1
/ " NPT pressure tapping point should be installed upstream of the
8
Pipe
Manual Shutoff
Valve
Figure 17 - Gas Connection
Pipe Coupling
Locations that Pressure
Tapping Point May Be
Installed
Gas Supply
Inlet
23D8036