Bradford White M-2-50T6DS User Manual

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Manual 238-47104-00A
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
Residential Energy Saver:
M1& M2(HE) UprightModels.
M1& M2 Lowboy Models.
M1& M2 UtilityModels.
M1& M2 Wall HungModels.
Light DutyEnergy Saver:
LD Upright Models.
LD Utility Models.
LD Lowboy.
LD WallHung.
Dairy Barn Deluxe Energy Saver:
DB Models.
RESIDENTIAL ELECTRIC AND LIGHT DUTY
COMMERCIAL ELECTRIC WATER HEATERS
Photo is of
M-2-50T6DS

Bradford White M-2-50T6DS Specifications

General

Capacity	50 gallons
Fuel Type	Natural Gas
Vent Type	Direct Vent
Height	61.75 inches
Diameter	22 inches
Energy Factor	0.67
Type	Tank
Voltage	120V
Weight	150 lbs
Warranty	6 years
Wattage	450W

Summary

Introduction and General Information

Manual Overview and Tools

Introduces the manual and lists required service tools.

Electrical Specifications and Formulas

Covers wiring configurations, formulas, and wattage limitations.

Sequence of Operation

Single Element Operation

Explains the heating cycle for single element water heaters.

Double Element Operation Modes

Covers non-simultaneous and simultaneous operation for dual elements.

Off-Peak Operation Sequence

Describes operation during off-peak utility times.

Troubleshooting

Common Heating Element Failures

Identifies common element malfunctions and causes.

Quick Step Plan for Hot Water Issues

Diagnostic plan for no or insufficient hot water.

Service Procedure RE-I: Line Voltage and High Limit (ECO) Testing

Line Voltage Testing

Procedure to test incoming voltage to the thermostat.

High Limit (ECO) Testing

Procedure to test the high limit safety switch.

Service Procedure RE-II: Heating Element Testing

Testing for Open or Burned Out Element

Methods to check elements for open circuits.

Testing for Short Circuit to Ground

Methods to check elements for short circuits to ground.

Service Procedure RE-III: Residential Thermostat Testing

Single Element / 4-Wire Sim. Operation Testing

Tests for single element and 4-wire simultaneous dual element systems.

Double Element Non-Simultaneous Operation Testing

Tests for non-simultaneous dual element systems (single/3-phase).

Double Element Simultaneous Three Phase Operation Testing

Tests for simultaneous 3-phase dual element systems.

Service Procedure RE-IV: Light Duty Commercial Thermostat Testing

Double Element Non-Simultaneous Single Phase Testing

Tests for non-simultaneous single-phase dual element systems.

Double Element Simultaneous Single Phase Testing

Tests for simultaneous single-phase dual element systems.

Double Element Non-Simultaneous Three Phase Testing

Tests for non-simultaneous three-phase dual element systems.

Double Element Simultaneous Three Phase Testing

Tests for simultaneous three-phase dual element systems.

Service Procedure RE-V: Thermostat Removal and Replacement

Thermostat Removal

Steps for safely removing thermostats.

Thermostat Replacement

Steps for correctly installing new thermostats.

Service Procedure RE-VI: Heating Element Removal and Replacement

Heating Element Removal

Procedures for removing heating elements.

Heating Element Replacement

Procedures for installing new heating elements.

Service Procedure RE-VII: Dip Tube and Anode Inspection and Replacement

Dip Tube Inspection and Replacement

Maintenance of inlet dip tubes.

Anode Inspection and Replacement

Maintenance of anode rods.

Generic Parts List

Parts Identification

Identifies and lists common water heater components.