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Bradford-White Corp
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Water Heater
Bradford-White Corp
D-38T-155
- page 44
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parts@bradfordwhite.com
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Contents
Main
SERVICE MANUAL
COMMERCIAL 24 VOLT FLUE DAMPER SERIES WATER HEATER WITH HONEYWELL INTEGRATED CONTROL SYSTEM
Table of Contents
Page
Tools Required for Service
Specifications
Sequence of Operation
1 2
34
5
CAUTION Use Caution Not to Damage Connectors when making Voltage Measurements or Jumping Terminals
Error Code Shown in Water Heater Display
6
Page
1. Max Setpoint (Display/Change)
2b. Water Temperature - Upper Sensor (Displays if there is an upper sensor - some models)
2c. Water Temperature - Lower Sensor (Displays if there are two sensors)
Max Setpoint value in Water Heater Display
&
3. Flame Current of Pilot Flame Sensor (Displays only in the Heating Cycle)
4. Setpoint (Display/Change)
5. F/C (Display/Change)
6. Differential (Display only - shows the differential of the thermostat)
Page
%
%
Step 4: Press Set button to confirm new Max Setpoint value and stop setting mode.
"Max Setpoint" stops flashing
"Max Setpoint" continues to flash while making adjustments
&
Page
%
Page
Step 3a: Press Temperature Up button to change temperature format to C
%
Step 3b: Press Temperature Down button to change tem perature format to F
Step 4: Press Set button to confirm F or C format. F/C will stop flashing
Page
%
%
&%
Exiting Service Mode
Page
%
%
&
Page
SERVICE PROCEDURE D24-I
Sensor Resistance at Various Temperatures
SERVICE PROCEDURE D24-I
Sensor Resistance Testing
Pilot Operation Testing
11
Pilot Inspection
Pilot Operation Testing
Flame rod
Page 29
Meter Probe
Meter Probe Checking pilot flame sens or wire and flame rod for continuity.
SERVICE PROCEDURE D24-III Main Burner Operation Testing
11
SERVICE PROCEDURE D24-III Main Burner Operation Testing
Page
Main Burner & Pilot Removal and Inspection
Control Board Replacement
unplug while performing this procedure.
SERVICE PROCEDURE D24-V Flue BaffleRemoval, Inspection
SERVICE PROCEDURE D24-VI Anode Removal and Inspection