NATURAL GAS
INSTALLATION
Continued
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.
Pressure Testing Gas Supply Piping System
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1.Close equipment shutoff valve (see Fig- ure 26).
2.Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter.
3.Check all joints from gas meter to equip- ment shutoff valve (see Figure 27). Apply a noncorrosive leak detection fluid to gas joints. Bubbles forming show a leak.
4.Correct all leaks at once.
Equipment | Open |
Shutoff |
|
Valve |
|
| O |
| Closed |
| PO |
Figure 26 - Equipment Shutoff Valve
Pressure Testing Fireplace Gas Connections
1.Open equipment shutoff valve (see Fig- ure 26).
2.Open main gas valve located on or near gas meter.
3.Make sure control knob of fireplace is in the OFF position.
4.Check all joints from equipment shutoff valve to thermostat gas valve (see Fig- ure 27). Apply a noncorrosive leak de- tection fluid to gas joints. Bubbles forming show a leak.
5.Correct all leaks at once.
6.Light fireplace (see Operating Fire- place, pages 17 and 18). Check all other internal joints for leaks.
7.Turn off fireplace (see To Turn Off Gas to Appliance, page 18).
8.Replace front panel.
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 fireplace 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 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.
Equipment
Shutoff
Valve
Gas Meter
Figure 27 - Checking Gas Joints
16 | 107105 |