Raypak 5042004 operating instructions Leak Test Procedure Dual-Seat Gas Valve, Post Start-Up Check

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Leak Test Procedure: Dual-Seat Gas Valve

Proper leak testing requires three pressure test points in the gas train.

Remove the access panel on the rear of the heater to access the gas valve for this test. Testpoint A is a blee- dle valve located upstream of the combination gas valve on the supply manifold.

Test point B is a bleedle valve located between the two automatic gas valve seats.

Test point C is a bleedle valve located downstream of both automatic gas valve seats and upstream of the manual valve. Refer to Fig. 49.

These tests are to be conducted with the electrical power to the heater turned OFF.

1.Manually close the downstream leak test valve.

2.Open the bleedle valve at test point A and connect a manometer to it. Verify that there is gas pressure and that it is within the proper range (NOTE: must not exceed 14.0 in. WC).

3.Open test point B and connect a rubber tube to it. Connect the other end of the tube to a manometer and look for a build-up of pressure. Increasing pressure indicates a leaking gas valve which must be replaced.

4.Next, close the upstream manual gas valve (field supplied) and remove the manometers from the bleedle valves in test point A and test point B. Connect a rubber tube from the test point A blee- dle valve to the test point B bleedle valve and open the upstream manual gas valve. Make sure that test point A & B bleedle valves have been opened so as to allow gas to flow. This will bring gas pressure to the second valve seat.

5.Open the bleedle valve at test point C and connect a second rubber tube to it. Connect the other end of the tube to a manometer and look for a build-up of pressure. Increasing pressure indicates a leak- ing gas valve which must be replaced.

6.Remove rubber tube and manometers. Close each test point bleedle valve as the tubes are removed.

7.After no leakage has been verified at all valve seats and test valves, open downstream leak test valve and restore electrical power to the heater.

 

 

TO BURNER

GAS

A

B

CD

Fig. 49: Leak Test Procedure

Post Start-Up Check

Check off steps as completed:

1.Verify that the heater and heat distribution units or storage tank are filled with water.

2.Confirm that the automatic air vent (if used) was opened two full turns during the venting proce- dure.

3.Verify that air has been purged from the system.

4.Verify that air has been purged from the gas pip- ing, and that the piping has been checked for leaks.

5.Confirm that the proper start-up procedures were followed.

6.Inspect burner to verify flame.

7.Test safety controls: If heater is equipped with a low water cut-off or additional safety controls, test

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Contents Reference Catalog no .54E Effective Replaces 241317 Rev Do so may result in an explosion or firePage Contents Pay Attention to These Terms Installations at Elevation Before InstallationProduct Receipt Model IdentificationGeneral Information Component LocationsGeneral Safety Time/Temperature Relationships in ScaldsWater Time to Produce Serious Temp Burn Installation Codes InstallationIndoor Installations Equipment BaseOutdoor Installations Combustion and Ventilation AirIndoor Units Table E Vent/Air Inlet Termination Clearances Conventional Combustion Air Supply InstallationsAir Filter Direct VentCanadian Installations Water PipingGeneral Relief Valve Piping Temperature & Pressure Gauge Hydrostatic TestCold Water Operation Pump Selection Hydronic HeatingFeedwater Regulator Cold Water StartsAir-Separation/Expansion Tank PipingModel Input Output 20 ∆T 30 ∆T 40 ∆T Min. Flow GpmDomestic Hot Water Three-Way ValvesPotable Water and Space Heating Pool HeatingPool heating application. Use the following instruc Pool/Spa Water Chemistry Winterizing Your HeaterExceed 5 ppm Gas Supply Connection Gas SupplyGas Supply Pressure Automatic Chlorinators Chemical FeedersModel In. NPT 4 in. NPT 2 in. NPT Electrical Power ConnectionsModel Manifold Gas Pressure High Fire ValuesCheck the Power Source Field-Connected ControllersMaking the Electrical Connections Field Wiring Connection VentingAppliance Categories Installations Support of Vent StackVent Terminal Location Venting Configurations Venting Installation TipsCanadian Installations InstallationMin Max. Length* ft10 Ø TerminationTypical Common Venting Common VentingModel Vent Size Volume Flue Products Engineered Vent SystemsHorizontal Through-the-Wall Direct Venting Category Horizontal Through-the-Wall Direct Venting Direct Vent-VerticalOutdoor Installation Model CertifiedCombustion Air Air Inlet Horizontal Max. Length** ft Vent Freeze Protection ControlsDifferential Graph Operating Modes10 VDC 20 mA Boiler Target Mode 3 Dedicated DHW10 VDC 20 mA DefinitionsPool Heater P, WHP Modes Default Setting Range Boiler H7 Modes Default SettingWater Heater WH1 Modes Default Setting Range Number Field Type Fault Description OperationRank Heater Sequence of Operation High Limit-Manual ResetIgnition Module Code ConditionFlow Switch High Limit-Auto Reset OptionalModulating Temperature Control High & Low Gas Pressure Switches OptionalBlocked Vent Switch Air Pressure SwitchUDB Diagnostic Board Wiring Diagram Models H & WH Wiring Diagram Models P & WHP Pre Start-up START-UPPre Start-up Check Initial Start-upBlower Check Start-UpFinishing Safety InspectionManifold Check Follow-UpPost Start-Up Check Leak Test Procedure Dual-Seat Gas ValveLighting Instructions OperationTo Turn Off Gas To Appliance UDB Fault HistoryStep TroubleshootingMaintenance Suggested Minimum Maintenance SchedulePreventive Maintenance Schedule Weekly Filter MaintenanceSemi-Annually AnnuallyFilter Replacement AppendixInside Air Contamination Important Instructions for the Commonwealth of Massachusetts Limited Parts Warranty MVB Types H and WH Limited Parts Warranty MVB Types P & WHP Nominal Factory Recommended Settings START-UP Checklist for FAN-ASSISTED Raypak Products

5042004 specifications

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