Desa VVMR24, VVMR18 Vented Natural Gas Logs, Installation, Continued, Installing Damper Clamp

®

VENTED NATURAL GAS LOGS

INSTALLATION

Continued

INSTALLING DAMPER

CLAMP

Secure the damper stop clamp provided to the leading edge of the damper as shown in Figure 5. If for any reason this clamp doesn't work on your fireplace, another suitable clamp or permanent stop must be installed, or the damper blade must be cut or removed.

Damper Clamp

Damper Damper

Masonry Fireplace	Manufactured
	Fireplace

Damper

Clamp

Damper

CAUTION: Use only new, black iron or steel pipe. Inter- nally-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 volume to log set. If pipe is too small, undue loss of pressure 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 6).

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

Apply pipe joint sealant lightly to male threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in a clogged burner injector.

Approved

Gas Hose

CSA Design-Certified

Equipment Shutoff

Valve With 1/8" NPT

Tap*

CAUTION: Use pipe joint seal- ant that is resistant to liquid pe- troleum (LP) gas.

We recommend that you install a sediment trap in supply line as shown in Figure 6. Locate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and heater. Locate sedi- ment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into log set controls. If sediment trap is not installed or is installed wrong, log set may not run properly.

CHECKING GAS

CONNECTIONS

WARNING: Test all gas pip- ing and connections for leaks after installing or servicing. Cor- rect all leaks at once.

WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

Figure 5 - Attaching Damper Clamp

CONNECTING TO GAS SUPPLY

WARNING: A qualified ser- vice person must connect log set to gas supply. Follow all local codes.

3" Minimum

From Gas Meter (5" W.C.** to 10.5" W.C. Pressure)

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 equip-

ment shutoff valve from gas supply pip-

ing system. Pressures in excess of 1/2 psig

will damage heater regulator.

Installation Items Needed

Before installing log set, make sure you have the items listed below.

•piping (check local codes)

•sealant (resistant to propane/LP gas)

•equipment shutoff valve

•test gauge connection

•adjustable (crescent) wrench or pliers

•sediment trap

•tee joint

•pipe wrench

Cap Pipe Nipple Tee Joint

Sediment Trap

Figure 6 - Gas Connection

*Purchase the optional CSA design-certi- fied equipment shutoff valve from your dealer. See Accessories, page 19.

**Minimum inlet pressure for purpose of input adjustment.

2.	Cap off open end of gas pipe where
	equipment shutoff valve was connected.
3.	Pressurize supply piping system by either
	using compressed air or opening main gas
	valve located on or near gas meter.
4.	Check all joints of gas supply piping
	system. Apply mixture of liquid soap
	and water to gas joints. Bubbles form-
	ing show a leak.
5.	Correct all leaks at once.
6.	Reconnect log set and equipment
	shutoff valve to gas supply. Check re-
	connected fittings for leaks.

8 901267