Vanguard Heating VYS24PWA Checking GAS Connections, Pressure Testing Gas Supply Piping System

VANGUARD

UNVENTED PROPANE/LP GAS LOG HEATER

INSTALLATION

Continued

WARNING: Never connect heater to private (non-utility) gas wells. This gas is commonly known as wellhead gas.

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 heater. If pipe is too small, undue loss of volume will occur.

Propane/LP	External Regulator
Supply
Tank

Vent Pointing Down

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 heater (see Figure 15).

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

Check your building codes for any special requirements for locating equipment shutoff valve to fireplace.

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 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 15. 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 heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

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

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 noncorrosive leak detection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.

CAUTION: Make sure exter- nal regulator has been installed between propane/LP supply and heater. See guidelines under Con- necting to Gas Supply, pages 11 and 12.

Pressure Testing Gas Supply Piping System

Test Pressures In Excess Of 1/2 PSIG

Figure 14 - External Regulator With Vent

Pointing Down

CSA Design-Certified Equipment

Shutoff Valve With 1/8" NPT Tap*

Approved Flexible Gas Hose	From External
(if allowed by local codes)
	Regulator (11"
Gas Control	W.C.** to 14"
	W.C. Pressure)

	Tee Joint
3" Minimum	Sediment
	Pipe Nipple Trap
	Cap

Figure 15 - Gas Connection

*Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 24.

**Minimum inlet pressure for purpose of input adjustment.

(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.

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

3.Pressurize supply piping system by ei- ther using compressed air or opening propane/LP supply tank valve.

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

5.Correct all leaks at once.

6.Reconnect heater and equipment shutoff valve to gas supply. Check re- connected fittings for leaks.

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