Desa MVO18VPA, MVO24VNA, MVO24VPA and connections for leaks after, under Connecting to Gas Sup

INSTALLATION

Continued

CAUTION:Useonlynew,black ironorsteelpipe.Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas vol- ume to heater. If pipe is too small, undue loss of volume will occur.

Installation must include an equipment shutoff valve, union and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from log set (see Figure 7).

IMPORTANT: Install equipment shutoff valve in an accessible location.The equipment shutoff valve is for turning on or shutting off the gas to the appliance.

Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.

WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

We recommend that you install a sediment trap in supply line as shown in Figure 7. Locate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and appliance. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

CAUTION: Avoid damage to gas control. Hold gas control with wrench when connecting it to gas piping and/or fittings.

		CSA Design-Certified
		Equipment Shutoff
		Valve with 1/8" NPT
		Tap*	Natural
			From Gas
Approved Flexible			Meter (5" W.C.**
Gas Hose (If			to 10.5" W.C.
allowed by local			Pressure)
codes)	3" Min.
			Propane/LP
Pipe	Cap	Tee	From External
			Regulator (11"
Nipple		Joint
			W.C.** to 14"
Sedament Trap
			W.C. Pressure)

Figure 7 - Gas Connection

*Purchase the optional CSAdesign-certified shutoff valve from your dealer. See Accessories, page 17.

** Minimum inlet pressure for purpose of input adjustment.

CHECKING GAS CONNECTIONS
	WARNING: Test all gas piping
and connections for leaks after
installing or servicing. Correct
all leaks at once.
	WARNING: Never use an open
flame to check for a leak. Apply a
noncorrosive leak detection fluid
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
	CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply
and appliance. See guidelines
under Connecting to Gas Sup-
ply, page 7.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1.	Disconnect appliance with its appliance main
	gas valve (control valve) and equipment shutoff
	valve from gas supply piping system. Pressures
	in excess of 1/2 psig will damage control valve.
2.	Cap off open end of gas pipe where equipment
	shutoff valve was connected.

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