Bradford white Re2h50 User manual

Temperature Sensors

Sensor Description

(wire color)

Normal

temperature

Range

Resistance

range in ohms

Resistance at

77º F

T2 Tank (white) 30º F-160º F 34K-1.75K 10K

T3a Evaporator

Inlet (red)

15º F-130º F 57K-3K 10K

T3b Evaporator

Outlet (white)

15º F-130º F 57K-3K 10K

T4 Compressor

Outlet (blue)

30º F-250º F 188K-3K 55K

Ambient (yel-

low)

15º F-130º F 57K-3K 10K

Bradford White Heat Pump Water Heater RE2H50, RE2H80

IMPORTANT SAFETY NOTICE

This information is intended for use by individuals

possessing adequate background of electrical,

electronic and mechanical experience. Any attempt to

repair a major appliance may result in personal injury

and property damage. The manufacturer or seller

cannot be responsible for the interpretation of this

information, nor can it assume any liability in connection

with its use. This quick reference guide is provided for

information purposes only and does not replace, modify

or change in any manner the Owner’s Manual and

Installation Instructions.

DISCONNECT POWER BEFORE SERVICING

IMPORTANT- RECONNECT ALL GROUNDING

DEVICES

All parts of this appliance capable of conducting

electrical current are grounded. If grounding wires,

screws, straps, clips, nuts or washers used to complete

a path to ground are removed for service, they must

be returned to their original condition and properly

fastened.

SPECIFICATIONS

Capacity................................................50/80 US gal

Tank Max Working Pressure........................150 PSI

Water Temperature Set Point Range ..100F - 140F

Electrical........................... 240/208VAC 60 Hz 1-PH

Circuit Breaker..............................................30 Amp

Upper Element Wattage...........................4500/3380

Lower Element Wattage...........................4000/3004

REFRIGERATION SYSTEM

Compressor....................................................500 W

Refrigerant Charge (R134a)..................29.1/30.9 oz

(50Gal/80Gal)

Compressor LRA ........................................... 14.0A

Compressor RLA ........................................... 2.56A

Typical High Side Pressure (70°F amb) .... 210-280

PSIA

Typical Low Side Pressure (70°F amb) 55-65 PSIA

SERVICE MODE

The Service Mode can be accessed by pressing and holding the UP

Arrow and Enter buttons simultaneously for 5 seconds. You will first

hear a single beep when pressing the buttons, then a two-tone sound

indicating the action was successful. A moment later, you will see

the first display of the thermistor T2 alternating with its temperature

displayed in the units selected (degrees F or C). The Service Mode

will time out after 15 minutes of button inactivity.

Five functions are available in Service Mode: View Thermistors,

Heating Component Status and Control, View Faults and Counters,

Personality, and Software Revision. You may switch from one function

to another by pressing the Mode button. The operating mode LED will

illuminate to indicate which service mode is selected. An explanation

of the five functions follows:

View Thermistor (Hidden LED) - Each of the 5 thermistors can be

monitored for the temperature they sense. The thermistor designation

appears on the display and alternates with the temperature in degrees

of the units selected - Fahrenheit or Celsius. Pressing the Down

Arrow button switches the display to the next thermistor in the list.

The following table shows the thermistors’ designations and their

function in the unit.

Designation Function

T2 Tank (Water) Temperature

T3a Evaporator Inlet Temperature

T3b Evaporator Outlet Temperature

T4 Compressor Discharge Temperature

T5 Ambient Air Temperature

Heating Component Status and Control, EEV Operation (Heat

Pump (Only) LED) - This function displays the status (on/off) for

each of the heating components - Lower Element, Upper Element,

Compressor (with fan), and Fan - and allows you to turn it on or off.

The first component is the Lower electric element (LE). On status is

signified by a 1 and off is 0. Pressing the Down Arrow button switches

to the Upper Element (UE). Pressing Down Arrow again switches to

the Compressor (with fan) (Co). Pressing the Down Arrow once more

switches to the fan (Fn) . Only one component can be on at one time.

The electric elements will only stay on for 5 minutes without refreshing

by pressing any button on the front panel. The compressor timeout

is 10 minutes. Press the Down Arrow button again to check EEV

Operation. The position will be displayed. Press the Enter button to

open the EEV in increments of 10, from 80 to 450. After reaching

450, pressing Enter will close the valve in increments of 10.

View Faults and Counters (Hybrid LED) - The control counts the

number of times a fault is recorded. A fault code is not displayed until

the number of counts in the fault table (refer to page 2) has been

reached. For example, if the upper element fails to draw current each

time the control energizes the upper element, the count will increase

by 1. However, if the element responds normally, the count will

decrement by 1.

The View Faults and Counters function displays any fault codes in the

system. Pressing the Down Arrow takes you to the next fault code, if

any. If no fault codes are active, “- - -” is displayed. Pressing the Filter

button switches the display to the fault counters. The displayed fault

code alternates with its count value. For example, if the thermistor

T3a has registered 3 failures, its value will be 3 and the display will

alternate between “F5” and “3”.

To clear all fault codes and fault counters, press and hold the Enter

button for 5 seconds and listen for the beep.

Personality (Electric (Only) LED)- This function allows the user to

verify that the correct parameter set has been programmed into the

control board (refer to Personality Table on page 2). The Personality

allows the software to properly control the heating system. The

Personality of the water heater cannot be changed, except by

replacing the control board.

Software Revision (Vacation LED) - This function allows the user

to view the software revision that is programmed into the control. If

the software revision is not correct, the correct revision should be

uploaded.

Exiting Service Mode - To exit Service Mode without waiting for

15 minute timeout, press and hold the Up Arrow and Down Arrow

simultaneously for 5 seconds and listen for two beeps.

Heat Pump

(Only)

Utilizes heat pump only.

Hybrid

Utilizes the heat pump and

electric heating elements.

Electric

(Only)

Utilizes electric elements

only. Stops the fan, the

heat pump and the flow of

cool air.

Vacation

Use this mode for periods

away from home.

Mode

Press this button to toggle

through the various heating

modes. Press and hold to

switch between ºF and ºC.

Display

Displays the current

temperature or the number

of days for vacation mode.

To display setpoint if display

has gone blank, press any

button.

Arrow Pad

Use the up and down

arrows to manually change

the water temperature, or to

select days for Vacation Mode.

Enter

Press to confirm selections.

Filter

The red LED indicates that

the filter needs cleaning.

Press and hold to reset.

T2 Tank Sensor

T3b Evaporator

Outlet Sensor

T4 Compressor

Outlet Sensor

T3a Evaporator

Inlet Sensor

T5 Ambient Air

Sensor

Condensate

Overflow Senso

PASS/FAIL COMPONENT OPERATION

Selected Mode SS LE UE Temporary Mode (if component failure is

detected)

Any P P P Runs in selected mode

Any F P P Electric (Only) mode

Hybrid P F P Hybrid Mode (but uses SS when LE is called for)

Electric (Only) P F P Electric (Only) Mode (UE only)

Heat Pump (Only) P F P Heat Pump (Only) mode

High Demand/Boost P F P High Demand/Boost (but uses SS when LE is called

for)

Hybrid P P F Control uses SS and LE based on demand algorithm

Electric (Only) P P F LE Only Mode

Heat Pump (Only) P P F Heat Pump (Only) Mode

High Demand/Boost P P F High Demand/Boost (but uses LE when UE called

for)

Any F F P Electric (Only) Mode (UE only)

Any P F F Heat Pump (Only) Mode

Any F P F LE Only Mode

Any F F F Electric (Only) Mode, displays 1 fault codes

SS = Sealed System

LE = Lower Element

UE= Upper Element

Double wall heat exchanger, suitable for potable water

connection.

CAUTION

238-52395-00 02/18

Printed in USA

238-52395-00 02/18