Bradford White E32-50S-3, E32-80R-3, E32-120R-3 User Manual
Medium Duty E32 Series Models
Commercial Electric Water Heaters
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
Commercial Electric Energy Saver:
E32-50S
E32-80R
E32-120R
Manual 239-47157-00B REV 08/18
Save this manual for future reference
E32 Medium Duty Commercial
Electric Water Heaters
Page Service Procedure
Introduction ………………………………………………………………………. 2 - - -
Tools……………………………………………………………………………… 2 - - -
General Information ……………………………………………………………… 3 - - -
Sequence of Operation …………………………………………………………… 5 - - -
Field Conversion of kW, Voltage and Phase…………………………………….. 6 - - -
Troubleshooting …………………………………………………………………. 9 - - -
Heating Element Testing ……………................................................................... 11 E32-I
Line Voltage Testing………………...…………………………………………... 12 E32-II
Fuse and ECO Testing…........................................................................................ 13 E32-III
Thermostat Operation Testing ……..................................................................... 14 E32-IV
Thermostat Removal and Replacement …………………………………………. 15 E32-V
Heating Element Removal and Replacement ……………………………………. 16 E32-VI
Dip Tube and Anode Inspection and Replacement ……………………………… 17 E32-VII
Generic Parts List ………………………………………………………………... 18 - - -
This service manual is designed to aid service and maintenance professionals on the function, proper diagnosis and repair of
Bradford White medium duty commercial electric water heaters.
The text and illustrations in this manual provide step by step instructions to facilitate proper operation and troubleshooting
procedures. Contact the Bradford White Technical Support Group immediately if diagnosis can not be made using the
methods described in this service manual.
- Multi Meter. - Phillips Head Screw Driver.
- 1-½ Deep Well Socket (element removal). - Thermometer.
- ¼" Nut Driver. - Drain Hose.
- Various Hand Tools: Pipe Wrench, Channel Locks, Pliers (common & needle nose), Wire cutters, Wire Strippers,
Flash Light.
Page 2
2
GENERAL INFORMATION
ABC
Commonly Used Formulas
Amps = Watts (for single phase units) Example 4500W/240V = 18.75A
Volts
Amps = Watts (for balanced 3 phase units) Example 4500W/240V x 1.732 = 10.82A
Volts x 1.732
Watts = Amps x Volts Example 18.75A x 240V = 4500W
Ohms = Volts Example (240V) / 4500W = 12.8 Ohms
2
2
Watts
BLACK
Ungrounded
RED
Ungrounded
240 120
GREEN
Grounding
ABCNeutral
120
120
120 208
208 208
RED BLACK RED
120
ABCNeutral
120
120
120 240
240 240
RED BLACK RED
Page 3
Neutral
277
277
277 480
480 480
RED BLACK RED
3
Full Load Amperes-(Phase 1/Phase 3)
GENERAL INFORMATION
Input Kw 208V
6
9
12
13.5
15
18
28.8/16.6
43.2/25
57.6/33.3
64.9/37.5
72.1/37.5
86.5/50
240V 277V 380V 415V 480V
25/14.4
37.5/21.6
50/28.9
56.2/32.5
62.5/36.1
75/43.4
21.6
32.4
43.3
48.7
54.1
64
10
14
19
21
23
28
8.3
12.5
16.7
18.8
20.9
25
12.5/7.2
18.7/10.8
25/14.4
28.1/16.2
31.2/18
37.5/21.6
Surface Mounted Thermostats
E32 series medium duty commercial water heaters use only surface mounted thermostats. Surface mounted
thermostats are mounted into a bracket which holds the thermostat against the side of the tank. Surface mounted
thermostats respond to tank surface temperatures to sense a call for heat, set point temperature settings and high limit
(ECO) activation. It is import that the entire back surface of the thermostat is in full contact or flush with the tank. An
improperly mounted thermostat will lead to improper heater operation.
Manual
ECO (high limit)
Reset button
Surface Mount
Combination Thermostat/
ECO (high limit)
89T Series
Temperature
control Dial
Direct Immersion “Screw-in” Type Heating Element
1-½ Hex
Screw-in Flange
Terminal Block
Screw
0642
4500W 240V
RC02404524
Terminal Block
Zinc Plated Copper or
Incoloy Sheath
Element Rating Ink Stamped
on side of Terminal Block.
Page 4
4
SEQUENCE OF OPERATION
E32 series medium duty, field convertible commercial electric water heaters are designed to operate using single phase
or three phase service connections. One size fits all Internal fusing is factory installed for all units. When field
conversions are required, no fuse change is necessary. Three surface mounted thermostats operating independently
are used to control a corresponding heating element.
Sequence of Operation.
1 1
Single phase line voltage is applied
across terminals L1 and L2 of terminal
block. Or Three phase line voltage is
applied to terminals L1 through L3 of
terminal block. Line voltage continues
through terminal block and fuse blocks
and connects to thermostats at
terminals L1 & L3.
2
ECO (high limit) in thermostat is closed,
so there is line voltage present at
terminal L4 of thermostats and to one
side of each element.
Terminal Block
Fuse Block
2 3
ECO Closed
Thermostat closed
at terminal T2
Water in tank is cold, so all thermostats
3
are closed at terminal T2 (calling For
heat). This completes the circuit and
allows current to flow through heating
element.
As each thermostat is satisfied,
4
it opens at terminal T2 interrupting
current flow through the respective
element. The system is now in stand-by
mode, waiting for the next call for heat.
Power to one
side of element
4
Thermostat open
at terminal T2
Page 5
5
FIELD CONVERSION FOR:
KW, Voltage and Phase
The E32 series medium duty commercial electric water heaters are field convertible. This allows Qualified Service
Providers the ability to convert wattage, voltage and phase using a factory supplied conversion kit as required per the
installation. Underwriters Laboratories Inc. recognizes this procedure as herein presented and no deviation from these
instructions are allowed.
KW Conversion
All E32 series medium duty commercial water heaters are factory wired to the maximum electrical duty for which they
have been designed. Therefore, internal electrical components satisfy the maximum voltage and maximum electrical
current conditions.
These instructions do not allow for a modification that adds or deletes the number of heating elements originally supplied
with the heater; therefore such a modification must not be attempted.
Special factory prepared “Conversion Kits” must be used for these conversions. These kits contain the heating
elements, element gaskets and product labeling overlays related to the newly created electrical parameters.
18 KW heaters suitable for operation with 208vac cannot be created by conversion since there are no “kits” established
for this electrical system. These heaters can be obtained by ordering directly from the factory.
Conversion Kit Available
Required
Total Element ---------- Kit Part Numbers --------- Heater KW Wattage 208 volts 240 volts 480 volts
6 2000 265-43942-13 265-43942-07 265-43942-01
9 3000 265-43942-14 265-43942-08 265-43942-02
12 4000 265-43942-15 265-43942-09 265-43942-03
13.5 4500 265-43942-16 265-43942-10 265-43942-04
15 5000 265-43942-17 265-43942-11 265-43942-05
18 6000 265-43942-18* 265-43942-12 265-43942-06
*265-43942-18 will require control box replacement (included in kit).
Following the heating element removal and replacement instruction on page 16, remove elements and replace with
elements from appropriate kit listed above.
The heaters rating plate will need to be modified because the conversion altered the electrical characteristics of the
heater. This rating plate is placed on every Commercial Electric water heater produced by Bradford White Corporation.
Element kits above contain rating plate label overlays related to the newly created electrical parameters. Follow the
instruction on page 8 For placement of overlays.
Voltage Conversion
1. Voltage conversion is accomplished by replacing the existing elements with elements that are rated at the
required voltage.
2. To accomplish this conversion refer to the above procedure for KW Conversion ---- Element Changes.
Control Box Conversion
1. Open front panel of control box installed on water heater and
disconnect the (6) load wires from fuse blocks.
2. Remove (4) screws joining control box to water heater and
remove control box.
3. Install new control box onto the water heater by feeding the
wires through the back of the control box and reinstall (4)
mounting screws.
4. Reconnect wires to new fuse blocks. Be certain to
match wire colors to Line side of fuse blocks.
Control box conversion is ONLY required
when converting water heater to 18kw 208v
Use caution to not damage any of the wire
insulation when removing control box.
NOTICE
(Kit# 265-43942-18)
CAUTION
Page 6
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