Desa Tech PC3460LP, PC4670LP Checking GAS Connections, Test Pressures In Excess Of 1/2 Psig

PROPANE/LP GAS DECORATIVE PATIO FIRE

INSTALLATION

Continued

You must install a two stage external regu- lator. The two stage external regulator will reduce incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pressure, regulator damage could occur. Install two stage external regu- lator with the vent pointing down as shown in Figure 4. Pointing the vent down protects it from freezing rain or sleet.

Propane/LP	Two Stage External
	Regulator with Vent
Supply Tank
	Pointing Down
(100 lb. or
larger)

Figure 4 - Two Stage External Regulator with Vent Pointing Down

CAUTION: Make sure a two stage external regulator has been installed between propane sup- ply and heater. See guidelines under Connecting to Gas Sup- ply, pages 5 and 6.

Pressure Testing Gas Supply

Piping System (Fixed Piping

System Only)

Test Pressures In Excess Of 1/2 PSIG

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

CAUTION: Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in cer- tain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas volume to ap- pliance. If pipe is too small, undue loss of pressure will occur.

If you are using a 100 lb. supply tank or larger, and a fixed piping system, 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 appliance (see Figure 5). IMPORTANT: Install equip- ment shutoff valve in an accessible location.

From Two	CSA/AGA Design-
Stage External	Certified Equipment
Regulator (10"	Shutoff Valve With
W.C.** to 14.5"	1/8" NPT Tap*
W.C. Pressure)
	To
	Patio Firepit
3" Minimum
Tee Joint Pipe Nipple	Cap

Sediment Trap

Figure 5 - Gas Connection (When Using 100 lb. Tank or Larger)

*Purchase the optional CSA/AGA design- certified equipment shutoff valve from your dealer. See Accessory, page 11.

**Minimum inlet pressure for purpose of input adjustment.

(3.5 kPa)

1.The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa).

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 pro- pane/LP supply tank slowly.

Note: If not opened slowly, excess-flow check valve on propane/LP tank will stop gas flow. If this happens, close propane/ LP supply valve and open again slowly.

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.

The equipment shutoff valve is for turning on and 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.

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 5. Locate sediment trap where it is within reach for cleaning. Install in piping system be- tween fuel supply and patio firepit. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps mois- ture and contaminants. This keeps them from going into appliance controls. If sediment trap is not installed or is installed wrong, appliance 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.

6.Reconnect unit and equipment shutoff valve to gas supply. Check reconnected fittings for leaks.

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

1.The appliance must be isolated from the gas supply piping system by closing its individual equipment shutoff valve dur- ing any pressure testing of the gas sup- ply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).

Equipment
	Open
Shutoff Valve

Closed

Figure 6 - Equipment Shutoff Valve

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