Desa LSL18NT, LSL18PT, SL18NT, SL18PT, VSL18NT, VSL18PT installation manual

INSTALLATION

Continued

WARNING:Neveruseanopen flame to check for a leak. Apply a noncorrosive leak detection fluid toalljoints.Bubblesformingshow a leak. Correct all leaks at once.

CAUTION: For propane/LP gas, make sure external regula- tor has been installed between propane/LP supply and heater. See guidelines under Connect- ing to Gas Supply, page 11.

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 heater regulator.

2.Cap off open end of gas pipe where equipment shutoff valve was connected.

3.Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air.

4.Check all joints of gas supply piping system. Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Reconnect heater and equipment shutoff valve to gas supply. Check reconnected fit- tings for leaks.

PRESSURE TESTING HEATER GAS
CONNECTIONS
1.	Open equipment shutoff valve (see Figure 17).
2.	For natural gas open main gas valve located
	on or near gas meter. For propane/LP gas open
3.	propane/LP supply tank valve.
	Make sure control knob of heater is in the OFF
4.	position.
	Check all joints from equipment shutoff valve
	to thermostat gas valve (see Figure 18 or 19).
	Apply a noncorrosive leak detection fluid to
5.	all joints. Bubbles forming show a leak.
	Correct all leaks at once.
6.	Light heater (see Operating Heater, page 14).
7.	Check all other internal joints for leaks.
	Turn off heater (see To Turn Off Gas to Appli-
8.	ance, page 15).
	Connect ignitor wire and replace front panel.
Equipment		Open
Shutoff Valve
		Closed
	Figure 17 - Equipment Shutoff Valve
	Gas
	Meter
		Equipment
		Shutoff Valve

Figure 18 - Checking Gas Joints for

Natural Gas

Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)

1.	Close equipment shutoff valve (see Figure 17).
2.	Pressurize supply piping system by either
	opening propane/LP supply tank valve for
	propane/LP gas or opening main gas valve
	located on or near gas meter for natural gas
	or using compressed air.
3.	Check all joints from gas meter for natural gas
	(see Figure 18) or propane/LP supply tank for
	propane/LP gas, to equipment shutoff valve
	(see Figure 19). Apply a noncorrosive leak
	detection fluid to all joints. Bubbles forming

Propane/LP Supply Tank

Equipment

Shutoff Valve

show a leak.

4. Correct all leaks at once.

Figure 19 - Checking Gas Joints for

Propane/LP Gas

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