Weil-McLain VHE 4 User Manual

UIEII- flic IAIN
MODELS HE (Series 2) AND VHE (Series 2)
NATURAL GAS-FIRED
INDUCED DRAFT BOILERS
SUPPLEMENTAL
INSTRUCTIONS
WITH WHITE-RODGERS
CYCLE-PILOT® SYSTEM FOR
NATURAL GAS-FIRED BOILERS
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MODEL VHE (Series 2)
MODEL HE (Series 2)
NATURAL
GAS
Part No. 550-Mi-422/0982WP

Weil-McLain VHE 4 Specifications

General

Brand	Weil-McLain
Model	VHE 4
Category	Boiler
Language	English

Summary

Boiler Equipment Components and Operation

Boiler Equipment Components

Details of various components comprising the boiler system.

Sequence of Operation

Step-by-step explanation of the boiler's operational cycle.

Wiring Diagrams

Schematic Wiring Diagram

Visual representation of electrical circuit connections.

Ladder Wiring Diagram

Control logic diagram illustrating system operation flow.

Trouble Shooting Procedures

General Troubleshooting Procedure

Guidelines and safety precautions before commencing troubleshooting.

Checking the Pressure Differential Switch

Procedure for testing the pressure differential switch functionality.

Trouble Shooting Tables

Table I: Blower and Circulator Not Operating

Diagnostic flowchart for blower and circulator failure.

Table II: Blower Not Operating, Circulator Operates

Diagnostic flowchart for blower failure with circulator functional.

Table III: Circulator Not Operating, Blower Operates

Diagnostic flowchart for circulator failure with blower functional.

Table IV: No Spark at Pilot

Diagnostic flowchart for lack of pilot ignition spark.

Table V: Spark Present, Pilot Will Not Light

Diagnostic flowchart for pilot ignition failure despite spark.

Table VI: Spark Will Not Shut-Off

Diagnostic flowchart for continuous spark after pilot ignition.

Table VII: Pilot Lights, No Main Burner Ignition

Diagnostic flowchart for failure of main burner ignition.