Monessen Hearth Vent-Free Fireplace Systems DBX24C* - Manual (Page 20)

20 33D4047
Pipe Coupling
To Heater
Valve
3"
Minimum
CAUTION
CONNECTING THE GAS
NOTICE: A qualifi ed gas appliance installer must connect the heater to the gas supply. Consult all local
codes.
IMPORTANT: Loosen the pipe adapter on the flex 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 model.
Always use an external regulator for all propane/LPG heaters 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.
Manual Shutoff
Valve
Pipe
Tee Joint
Sediment Trap Pipe Nipple
Cap
Stainless
Flexible Tube
Figure 27 - Gas Connection
CAUTION
Use new black iron pipe, steel pipe, copper tubing or internally tinned copper tubing.
Internally tinned copper tubing can only be used per National Fuel Code, section 2.6.3,
providing gas meets 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 1/8" NPT pressure tapping point should be installed upstream of the appliance.
See Figure 27.
A sediment trap should be installed upstream to prevent moisture and contaminants
from passing through the pipe to appliance controls and burners. Failure to do so
could prevent the appliance from operating reliably. See Figure 27.