Desa CBN20 installation manual Installation, Continued, Pressure Testing Gas Supply Piping System

Page 12
Pressure Testing Gas Supply Piping System

12

INSTALLATION

Checking Gas Connections

INSTALLATION

Continued

CHECKING GAS CONNECTIONS

Pressure Testing Heater Gas Connections WARNING: Test all gas piping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once.

Manual background 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.

Manual background CAUTION: For propane/LP gas, make sure exter- nal regulator has been installed between propane/LP supply and heater. See guidelines under Connecting to Gas Supply, page 11.

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 (con- trol valve) and equipment 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 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 com- pressed air.

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

5.Correct all leaks at once.

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

Pressure Testing Heater Gas Connections

1.Open equipment shutoff valve (see Figure 16).

2.For natural gas open main gas valve located on or near gas meter. For propane/LP gas open propane/LP supply tank valve.

3.Make sure control knob of heater is in the OFF position.

4.Check all joints from equipment shutoff valve to thermostat gas valve (see Figure 17 or 18). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Light heater (see Operating Heater, page 13). Check all other internal joints for leaks.

7.Turn off heater (see To Turn Off Gas to Appliance, page 14).

8.Replace front panel.

Open

Equipment

Shutoff

Valve

Closed

Figure 16 - Equipment Shutoff Valve

Thermostat

Gas Valve

Gas

Meter

Manual backgroundManual background Equipment

Shutoff

Valve

Figure 17 - Checking Gas Joints for Natural Gas

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

1.

Close equipment shutoff valve (see Figure 16).

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 com-

 

pressed air.

3.

Check all joints from gas meter for natural gas (see Figure 17)

 

or propane/LP supply tank for propane/LP gas, to equipment

 

shutoff valve (see Figure 18). Apply a noncorrosive leak de-

 

tection fluid to all joints. Bubbles forming show a leak.

4.

Correct all leaks at once.

Propane/LP

Supply

Tank

Thermostat

Gas Valve

Manual background Equipment

Shutoff

Valve

Figure 18 - Checking Gas Joints for Propane/LP Gas

Manual backgroundManual backgroundManual backgroundManual backgroundManual backgroundForManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual background.Manual backgroundManual backgroundManual backgroundManual background.comManual backgroundManual backgroundManual backgroundManual backgroundManual background

107882-01F

Image 12
Contents CBN20, CBP20 CBN20T, CBP20T CBN30T, CBP30T CBT20NT, CBT20PT CBT30NT, CBT30PTCBN20TK, CBP20TK UNVENTED VENT-FREE BLUE FLAME GAS HEATERTABLE OF CONTENTS SAFETY INFORMATIONWARNINGS PRODUCT FEATURES PRODUCT IDENTIFICATIONLOCAL CODES UNPACKINGAIR FOR COMBUSTION AND VENTILATION PROVIDING ADEQUATE VENTILATIONUnusually Tight Construction Confined and Unconfined SpaceContinued AIR FOR COMBUSTION AND VENTILATIONAIR FOR COMBUSTION AND VENTILATION AIR FOR COMBUSTION AND VENTILATION ContinuedVentilation Air From Inside Building Ventilation Air From OutdoorsINSTALLATION INSTALLATION ITEMSCHECK GAS TYPE LOCATING HEATERINSTALLATION ContinuedAttaching Thermostat Sensing Bulb Mounting BracketINSTALLATION ContinuedAttaching Mounting Bracket To Wall Placing Heater On Mounting BracketINSTALLATION Installing Bottom Mounting ScrewsContinued Mounting Base Feet to HeaterINSTALLATION CONNECTING TO GAS SUPPLYContinued INSTALLATION Pressure Testing Gas Supply Piping SystemPressure Testing Heater Gas Connections ContinuedOPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTINGLIGHTING INSTRUCTIONS INSPECTING HEATER OPERATING HEATERContinued Shutting Off HeaterCLEANING AND MAINTENANCE INSPECTING HEATERContinued Air PassagewaysSPECIFICATIONS SERVICE HINTSTECHNICAL SERVICE SERVICE PUBLICATIONSTROUBLESHOOTING OBSERVED PROBLEMPOSSIBLE CAUSE REMEDYTROUBLESHOOTING OBSERVED PROBLEMMaintenance, page ContinuedTROUBLESHOOTING OBSERVED PROBLEMMaintenance, page ContinuedILLUSTRATED PARTS BREAKDOWN MODELSCBN20 CBP20PARTS LIST PARTS LISTPART NUMBER FOR CBN20ILLUSTRATED PARTS BREAKDOWN PARTS LIST PARTS LISTPART NUMBER FOR CBN20TILLUSTRATED PARTS BREAKDOWN MODELSCBT20NT, CBT20PT CBT30NT, CBT30PTPARTS LIST PARTS LISTPART NUMBER FOR CBT20NTREPLACEMENT PARTS ACCESSORIESPARTS UNDER WARRANTY PARTS NOT UNDER WARRANTYOWNERS REGISTRATION FORM Postage Required TAPETAPE 2701 Industrial Drive P.O. Box Bowling Green, KYPARTS CENTRALS Laportes Parts & ServiceBaltimore Electric East Coast EnergyNOT A UPC WARRANTY INFORMATIONLIMITED WARRANTY VENT-FREERESIDENTIAL GAS HEATERS Model Serial No Date Purchased