Water Heater User Manual

Plus Water Heaters Service Technician’s Troubleshooting Guide

This guide is to be used in conjunction with all GOLD and ULTRA Plus

30/40/60/80 and PLUS 100/110/119/120 Indirect Fired Water Heater

Technical Specification Manuals Maintenance Guide.

Good Trouble Shooting Practices

Before leaving for the job site:

• Check your parts and tools.

- Test equipment and tools that you will need:

Electrical meter that can measure voltage and continuity

Pressure gauge, Watts #276H300 test gauge

Temperature gauge and Stopwatch

Bucket, 1 gallon or larger with volume markings

Thermostat (Aquastat) W-M P/N 633-900-130 for GOLD/Ultra Plus

30/40/60/80

Thermostat (Aquastat) W-M P/N 635-100-010 for PLUS 100/110/119/120

Drywell seal repair kit W-M P/N 635-600-150

• Know the water heater model number.

• Know boiler manufacturer and model number.

• Have the Installation and Maintenance Manual and/or wiring and piping

schematic readily available.

Get the latest revisions from www.Weil-McLain.com

Remember !!

Follow the Troubleshooting Guide step by step, always double checking your

results. Skipping steps or not completing steps can lead to wrong conclusions,

repeated visits to the job site, and unhappy customers.