Desa VF-18P-EMU, VF-18N-EMU Checking GAS Connections, Pressure Testing gas Supply Piping system

Page 12

12

INSTALLATION

Connecting To Gas Supply (Cont.) Checking Gas Connections

INSTALLATION

Continued

CSA Design-Certified Equipment Shutoff Valve With 1/8" NPT Tap*

Approved Flexible Gas Hose (if allowed by local codes)

PROPANE/LP

-From External Regulator (11" W.C.**

to 14" W.C.

Pressure)

CHECKING GAS CONNECTIONS

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 noncorrosive

 

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

3" Minimum

NATURAL

 

- From Gas

 

Meter

 

(5" W.C.**

 

to 10.5" W.C.

Gas Control

Pressure)

 

Pipe Cap

Tee

Nipple

Joint

Sediment Trap

Figure 13 - Gas Connection (Remote-Ready Models Only)

*Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 27.

**Minimum inlet pressure for purpose of input adjustment.

WARNING: Test all gas piping and connections 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 detection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.

CAUTION: Make sure external 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 (control valve) and equipment shutoff valve from gas supply piping system. Pressures in excess of 1/2 psig will damage heater regulator.

5.

Correct all leaks at once.

6.

Reconnect heater 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.Close equipment shutoff valve (see Figure 14).

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 15, page 13). Apply noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

4.Correct all leaks at once.

Pressure Testing Heater Gas Connections

1.Open equipment shutoff valve (see Figure 14).

2.Open main gas valve located on or near gas meter for natural gas or 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 gas control (see Figures 15 and 16 page 13). Apply noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Light heater (see Operating Heater, pages 14 through 16). Check all other internal joints for leaks.

7.Turn off heater.

ON

EquipmentPOSITION

(OPEN)

Shutoff

Valve

OFF

POSITION

(CLOSE)

Figure 14 - Equipment Shutoff Valve

For more information, visit www.desatech.com

111826-05

Image 12
Contents VF-24N-EMU VF-24P-EMU VF-18N-EMU VF-18P-EMU What to do if YOU Smell GASTable of Contents Safety InformationProduct Identification Product IdentificationOptional Remote Control Accessories Product FeaturesLocal Codes UnpackingDetermining FRESH-AIR Flow for Heater Location Confined and Unconfined SpaceDetermining if You Have a Confined or Unconfined Space Ventilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Installation Installation and Clearances for VENT-FREE OperationCheck GAS Type If Not Using Mantel Minimum Noncombustible Material ClearancesDetermining Minimum Mantel Clearance When Using a Hood Mantel ClearancesFloor Clearances Determining Minimum Mantel ClearanceInstalling Damper Clamp Accessory for Vented Operation Installing Heater AssemblyInstallation Items Needed Area of Various Standard Round FluesConnecting to GAS Supply Pressure Testing gas Supply Piping system Pressure Testing Heater Gas ConnectionsChecking GAS Connections Checking Gas Joints propane/LP only For Your Safety Read Before Lighting Operating HeaterLighting Instructions Manual Lighting Procedure Remote Control OperationTo Turn OFF GAS to Appliance Selector Toggle Switch Optional Remote Control Inspecting Burners Pilot Flame PatternBurner Flame Pattern Cleaning and Maintenance Cleaning Burner Injector Holder and Pilot AIR Inlet HoleLogs Troubleshooting Observed Problem Possible Cause RemedyRefer to Air for Combustion and Venti Gas leak. See Warning statement at Specifications VF-18N-EMU VF-24N-EMUWiring Diagram Service HintsTechnical Service Replacement PartsLog sets and mounting plates are ordered as an assembly Illustrated Parts BreakdownVF-24N-EMU Parts List Parts ListAccessories This page Intentionally Left Blank Owners Registration Form Postage Required 111826-05 Warranty Information