Operating instructions
30
75D0004
MLDV Series Gas Fireplace
3" Minimum
FP1978
gas connection
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 46
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 replace.
Check your building codes for any special requirements
for locating equipment shutoff valve to replaces.
Apply pipe joint sealant lightly to male threads. This will
prevent excess sealant from going into pipe. Excess seal-
ant 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 46. Locate sediment
trap/drip leg where it is within reach for cleaning. 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.
Figure 46 -
Gas Connection
Cap
Approved Flexible
Gas Line
CSA Design-Certied Equipment
Shutoff Valve with 1/8" NPT Tap*
Sediment Trap/Drip Leg
From Gas Meter
(4.5" w.c. to 10.5" w.c. Pressure)
From External Regulator
(11" w.c. to 13" w.c. Pressure)
The gas line connection may be made using 1/" rigid tubing or an approved ex 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.Z3.1, NFPA54. In Canada CSA-B149 (1
or ) Installation Code.
Tee Joint
Pipe Nipple
Figure 46