MHSC WDV500 Installation And Operating Instructions Manual page 23

FIreplace InstallatIOn
Only persons licensed to work with gas
piping may make the necessary gas
connections to this appliance.
nOte: The gas line connection may be made using 1/2" rigid tubing or an approved flex connector.
Since some municipalities have additional local codes it is always best to consult your local authorities
and the current edition of the National Fuel Gas Code ANSI.Z223.1, NFPA54. In Canada CSA-B149
(1 or 2) Installation Code.
A listed 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. Figure 33
IMpOrtant: Install main gas valve (equipment shutoff valve) in an accessible location. The main gas
valve is for turning on or shutting off the gas to the fireplace.
Check your building codes for any special requirements for
locating equipment shutoff valve to fireplaces.
Apply pipe joint sealant lightly to male threads. This will prevent
excess sealant from going into pipe. Excess sealant in pipe
could result in clogged burner system valves.
We recommend that you install a sediment trap/drip leg in
supply line as shown in Figure 33. Locate sediment trap/drip leg where it is within reach for clean-
ing. Install in piping system between fuel supply and burner system. Locate sediment trap/drip leg
where trapped matter is not likely to freeze. A sediment trap collects moisture and contaminants and
keeps them from going into the burner system gas controls. If sediment trap/drip leg is not installed
or is installed wrong, burner system may not run properly.
Approved Flexible
Gas Line
Sediment Trap/Drip Leg
78D0011
CSA Design-Certified
Equipment Shutoff Valve
with 1/8" NPT Tap*
Tee Joint
Pipe Nipple
Cap
Figure 33 -
Gas Connection
FP1978
gas connection
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. Figure 33
use pipe joint sealant that is resistant to
liquid petroleum (lp) gas.
(4.5" w.c. to 10.5" w.c. Pressure)
From External Regulator
(11" w.c. to 13" w.c. Pressure)
3 "
M i
n i m
u m
WDV Series Gas Fireplace
natural Gas
From Gas Meter
propane/lp
23