Monessen Hearth IDV490NVC 用户手册

18 

A listed manual shutoff is factory installed upstream of appliance. Union tee and plugged 

1

/

8

" NPT pressure tapping point 

should be installed upstream of the appliance. See Figure 15.
IMPORTANT: The main gas valve is for turning on or shutting off the gas to the insert. 

Check your building codes for any special requirements for 

locating equipment shutoff valve to inserts.
Apply pipe joint sealant lightly to 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 15. 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 traps moisture and contaminants. This 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. 

Tee Joint
Pipe Nipple
Cap

Approved Flexible 

Gas Line Supplied 

with Appliance 

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)