Bradford-White Corp M-2-50T6DS Manual De Usuario

WARNING

High voltage exposure. Use caution to avoid

personal injury during this procedure.

Double Element, Non-Simultaneous,

Single Phase Operation (continued)

Tank Does Not Deliver Enough Hot

Water (continued).
7. Check voltage across terminal L3 of upper

thermostat & T2 of lower Thermostat.

(see illustration 32).

A) Rated voltage NOT present,

Replace lower thermostat.

B) Rated voltage is present, okay,

go to step 8.

8. Check voltage across lower element

(see illustration 33).

A) Rated voltage NOT present,

Check wire connections between

thermostats & element.

B) Rated voltage IS present,

Repeat element testing

see page 15.

Illustration 32

Illustration 33

WARNING

Be sure thermostats are reset to

their original temperature settings

as found prior to thermostat

testing

Illustration 34

Water Temperature In Tank Is Above Thermostat Setting.

1. This procedure assumes line voltage, ECO and elements are in working order.
2, Adjust upper and lower thermostat to the lowest setting.
3. Turn power “ON” to water heater and Set multi-meter to “Volts AC”
4. See illustration 32 above. Check across terminal L3 of upper thermostat

& T2 of lower thermostat.

A) Rated voltage IS present, replace lower thermostat.
B) Rated voltage NOT present, okay, go to step 5 below.
C) Lower than rated voltage IS present, recheck for grounded lower

element see page 15.

5. Check across terminal L4 & T2 of upper thermostat (see illustration 34).

A) Rated voltage IS present, replace upper thermostat.
B) Rated voltage NOT present, upper thermostat is okay.
C) lower than rated voltage IS present, recheck for grounded upper

element see page 15.

Page 26

SERVICE PROCEDURE RE-IV

Light Duty Commercial

Thermostat Testing