INSTALLATION

Continued

CHECKING GAS CONNECTIONS

WARNING:Test allgas piping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once.

WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detec- tion fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.

Test Pressures Equal To or Less Than

1/2 PSIG (3.5 kPa)

1. Close equipment shutoff valve (see Figure 15).

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 to equipment shutoff valve for natural gas or propane/LP supply to equipment shutoff valve for propane/ LP (see Figure 16 or 17). Apply a noncorrosive leak detection fluid to gas joints. Bubbles forming show a leak.

4. Correct all leaks at once.

Equipment

Open

Shutoff

 

Valve

 

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 12.

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.

Closed

Figure 15 - Equipment Shutoff Valve

Equipment Shutoff Valve

Gas Meter

Control Valve

Location

Figure 16 - Checking Gas Joints for

Natural Gas

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 gas joints. Bubbles forming show a leak.

5. Correct all leaks at once.

Propane/LP Supply Tank

Equipment Shutoff Valve

Control Valve

Location

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

Figure 17 - Checking Gas Joints for

Propane/LP Gas

14

www.desatech.com

108382-01G

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Desa FVFM27PR installation manual Checking GAS Connections, Test Pressures In Excess Of 1/2 Psig KPa

FVFM27PR specifications

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