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PB Heat DE manual Electrical, D.Sequence Of Operation, 2 Wiring and Connection Diagram

Models: DE

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Figure 6.2: Wiring and Connection Diagram

ELECTRICAL

Figure 6.2: Wiring and Connection Diagram

D.SEQUENCE OF OPERATION

1.Thermostat calls for heat, energizes Control Relay (CR).

2.Control Relay (CR) energizes circulator.

3.Limit senses boiler water temperature. Prevents boiler operation until water temperature falls approximately 15°F (8°C) below the cut-out temperature.

4.Limit energizes Fan and Isolation Relay (IR).

5.Negative pressure induced by fan switches Pressure Switch, continuing power through closed contacts (IR-1) and flame roll-out switch.

6.Gas valve energizes. a. Igniter on.

b.Pilot gas on, igniting pilot.

7.Pilot flame detected.

a.Igniter off.

b.Main gas on, igniting main burners.

Note: If pilot flame is not detected within 30 seconds, the igniter is turned off for 30 seconds, and then turned back on. If the pilot is not detected within 30 seconds, the igniter and pilot gas are turned off for 5 minutes. The sequence then resumes at Step 6a.

8.Call for heat ends.

a.Pilot and main gas off, extinguishing pilot and main burners.

b.Fan and circulator off.

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PB Heat DE manual Electrical, D.Sequence Of Operation, 2 Wiring and Connection Diagram

Contents

Installation Operation & Maintenance Manual Gas BoilersSeries DE TABLE OF CONTENTS TABLE OF CONTENTSUSING THIS MANUAL USING THIS MANUALDANGER A.INSTALLATION SEQUENCEPREINSTALLATION 1. PREINSTALLATIONA.ACCESSIBILITY CLEARANCES DANGERFigure 1.3 Air Openings - All Air Directly from PREINSTALLATIONwhere PREINSTALLATIONPREINSTALLATION D.INSTALLATION SURVEYE.PLANNING THE LAYOUT BOILER SET-UP 2.BOILER SET-UP3. WATER PIPING AND CONTROLS WATER PIPING AND CONTROLSA.BOILER SUPPLY AND RETURN Figure 3.3 Safety Relief Valve Hook-Up B.SAFETY RELIEF VALVEInstallation with Air Elimination in WATER PIPING AND CONTROLSC.PIPING FOR ZONED SYSTEMS WATER PIPING AND CONTROLSFigure 3.5 Zone Piping with Zone Valves Figure 3.6 Zone Piping with CirculatorsD.EXPANSION TANK WATER PIPING AND CONTROLSE.INDIRECT-FIREDWATER HEATER F.FREEZE PROTECTIONVENTING 4. VENTINGA.GENERAL B.CHIMNEY VENTINGTable 4.2. Equivalent Vent Length VENTINGFigure 4.3 Vent Pipe Adapters VENTINGVENTING D. DIRECT EXHAUST VERTICAL VENTINGFigure 4.4 Direct Exhaust Sidewall Venting VENTING E.BOILER REMOVAL FROM COMMON VENTING SYSTEMFigure 4.5 Direct Exhaust Vertical Venting GAS PIPING 5.GAS PIPINGNatural Gas GAS PIPINGLP Gas Table 5.3 Pipe CapacityELECTRICAL 6. ELECTRICALA. WIRING B.ZONED SYSTEM WIRINGFigure 6.2 Wiring and Connection Diagram ELECTRICALD.SEQUENCE OF OPERATION Figure 6.3 Ignition System Operating Sequence ELECTRICALFigure 6.4 Zone Wiring with Zone Valves Figure 6.5 Zone Wiring with CirculatorsELECTRICAL 7. START-UPPROCEDURES START-UPPROCEDURESA.COMPLETING THE INSTALLATION Figure 7.1 Gas Valve, Manifold and Burner Assembly - Intermittent Ignition START-UPPROCEDURESSTART-UPPROCEDURES FOR YOUR SAFETY READ BEFORE LIGHTINGOPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCEC.ADJUSTMENT OF GAS PRESSURE REGULATOR START-UPPROCEDURESB.CONTROL DESCRIPTIONS D.CHECKING BURNER INPUTSTART-UPPROCEDURES E.CHECK-OUTPROCEDURETime that 3.Low Water Cut-Offif used - Consult the manufacturer’s instructions for the low water cut-offoperational check procedure START-UPPROCEDURESTROUBLESHOOTING 8. TROUBLESHOOTINGB.TROUBLESHOOTING GUIDES DANGERSEE TABLE TROUBLESHOOTINGProblem TROUBLESHOOTING1. See Figure 1. See FigureTROUBLESHOOTING MAINTENANCE 9. MAINTENANCEA.GENERAL MAINTENANCEB.DAILY WITH BOILER IN USE C.WEEKLY WITH BOILER IN USEThe boiler is at room temperature MAINTENANCEDANGER E.ANNUALLY BEFORE START OF HEATING SEASON10. BOILER DIMENSIONS & RATINGS BOILER DIMENSIONS & RATINGSSERIES DE BOILER RATINGS 11. REPAIR PARTS REPAIR PARTSREPAIR PARTS SERIES DE GAS BOILER Figure 11.2 Base/Burners/Manifold REPAIR PARTSItem No REPAIR PARTSDescription Part Selection InformationPage Page TO THE INSTALLER Installation Operation & Maintenance ManualQualified Service Agency Series DE