Williams 2503532, 4003532 Checking GAS Connections, Pressure Testing Gas Supply Piping System

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THE COMFORT PRODUCTS PEOPLE

DIRECT-VENT NATURAL GAS HEATER

INSTALLATION

(Continued)

Installation must include an equipment shutoff valve (supplied), ground joint union, plugged 1/8" NPT tap, and a sediment trap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from furnace (see Figure 15).

Install an 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 threads. Prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged furnace valves.

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

Install sediment trap in supply line as shown in Figure 15. Locate sediment trap where it is within reach for cleaning. A sediment trap traps moisture and contaminants. This keeps them from going into furnace controls. If sediment trap is not installed or is installed wrong, furnace may not run properly.

IMPORTANT: Locate sediment trap where trapped matter will not freeze. Install sedi- ment trap in a vertical run of pipe. If gas piping enters furnace from rear (outside), you must locate sediment trap in crawl space (see Figure 15). If you install furnace in structure with slab foundation, you must install gas piping to front of furnace (inside) (see Figure 15).

CHECKING GAS

CONNECTIONS

WARNING: Test all gas pip- ing and connections for leaks after installation or servicing. Correct 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.

Pressure Testing Gas Supply Piping System

Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)

 

Gas Piping

Gas Piping

Equipment

Entering

 

Entering

Shutoff Valve

Furnace

 

Furnace

 

Front

 

Rear

Test Gauge

(Inside)

 

(Inside)

 

 

 

Connection

 

 

 

 

 

 

Equipment

To Gas Supply

 

 

Shutoff

3" Min.

 

 

Valve

 

 

 

Sediment

 

 

 

Trap

 

 

 

To Gas Supply

 

 

 

3" Min.

 

Slab Floor Installation

Test Gauge

Sediment

 

Connection

 

 

Trap

 

 

 

 

Crawl Space Installation

Figure 15 - Gas Connection

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 (3.5 kPa) 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 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 furnace and equipment shutoff valve to gas supply. Check re- connected fittings for leaks.

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Contents For Your Safety OWNER’S Operation and Installation ManualFor Your Safety What to do if YOU Smell GAS Safety Information Local Codes Product FeaturesSpecifications UnpackingCheck GAS Type InstallationInstallation Items Locating FurnaceInstalling in Masonry Wall Installing ThermostatInstalling in Normal Frame Wall Creating Wall Opening and Mounting FurnaceLocating Thermostat on Wall Routing Thermostat CableConnecting Furnace to Gas Supply at Front of Furnace Connecting to GAS SupplyMounting the Thermostat to Wall Connecting Furnace to Gas Supply at Rear of Furnace Removing Screws on Lower Flange 40,000 BTU/Hr Model ShownProviding Gas Piping to Furnace ExamplePressure Testing Gas Supply Piping System Checking GAS ConnectionsPressure Testing Furnace Gas Connections Performance CheckOperating Furnace For Your Safety Read Before LightingOperating Instructions To Turn OFF GAS To Furnace Inspecting Burner FlameNormal Operating Sequence Thermostat Control OperationCleaning and Maintenance Troubleshooting Observed Problem Possible Cause RemedyIgnition Failures Observed Problem Possible Cause Wire and wire connections at probe Technical Service Wiring Diagrams ReplacementService Hints PartsIllustrated Parts List Cabinet Assembly 25,000 BTU/HR ModelCabinet Assembly 40,000 BTU/HR Model Combustion Chamber Assembly 25,000 BTU/HR Model Combustion Chamber Assembly 40,000 BTU/HR Model Burner Assembly 25,000 BTU/HR Model Burner Assembly 40,000 BTU/HR Model Blower Assembly 25,000 BTU/HR Model Blower Assembly 40,000 BTU/HR Model Warranty Information Limited Warranty Williams GAS Wall Furnace

2503532, 4003532 specifications

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