Rheem Everhot 2A1050M7 Operating instructions

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
Rheem Australia Pty Ltd ABN 21 098 823 511
SERVICE INSTRUCTIONS
Stainless Steel
Electric Water Heaters
TM074
Issued: November 13
Revision: AB
Issued: July 16
Rheem Stellar
Everhot
AquaMax
4A1050
2A1050
E50S
4A1080
4A1125
4A1160
4A1250
4A2250
2A1250
4A1315
4A2315
2A1315

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
2
CONTENTS
INTRODUCTION .................................................................................................................3
SAFETY WARNING.............................................................................................................3
RHEEM & EVERHOT MODEL IDENTIFICATION...............................................................4
AQUAMAX MODEL IDENTIFICATION................................................................................4
SPECIFICATIONS...............................................................................................................5
PREVENTATIVE MAINTENANCE ......................................................................................6
OPERATION........................................................................................................................7
COMPONENTS AND THEIR FUNCTION ...........................................................................7
WIRING DIAGRAMS ...........................................................................................................8
PLUMBING DIAGRAMS......................................................................................................9
PRODUCT CHANGES ......................................................................................................11
FAULT FINDING................................................................................................................12
General Fault Finding Chart.......................................................................................14
Fault Finding Chart 1 –No Hot Water........................................................................15
Fault Finding Chart 2 –Insufficient Hot Water / Water Not Hot Enough.....................18
Fault Finding Chart 3 –Water Too Hot.......................................................................19
Fault Finding Chart 4 –Leaking Water Heater...........................................................20
Fault Finding Chart 5 –Noisy Water Heater...............................................................20
COMPONENT ADJUSTMENT PROCEDURES ................................................................25
COMPONENT REPLACEMENT PROCEDURES .............................................................26
DOCUMENT REVISION HISTORY...................................................................................29
Common Faults..............................................................................................................12
Fault Finding Charts.......................................................................................................14
Fault Finding Tests ........................................................................................................21
Electrical Insulation Testing ...........................................................................................24
Thermostat Adjustment..................................................................................................25
Draining the Water Heater (Procedure 1) ......................................................................26
Pressure & Temperature Relief Valve (Procedure 2).....................................................26
Thermostat (Procedure 3)..............................................................................................27
Element (Procedure 4)...................................................................................................27

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
3
INTRODUCTION
The information provided in these instructions is based on the water heater being installed
in accordance with the Installation Instructions provided with each water heater.
Should you require further technical advice on a Rheem, Everhot or Aquamax Electric
Water Heater, contact your nearest Rheem Service Department where all genuine
replacement parts are also available.
SAFETY WARNING
The purpose of this Service Manual is to provide sufficient information to allow a person
with the skills as required by the controlling Regulatory Authorities to carry out effective
repairs to a Rheem Stellar, Everhot or Aquamax SS Electric Water Heater in the minimum
of time.
Safety precautions or areas where extra care should be observed when conducting tests
outlined in this service manual are indicated by print in bold italics and/or a warning
symbol. Take care to observe the recommended procedure.
“Live” testing to be conducted. Personal Protective Clothing (PPE) must
be worn to prevent the risk of electric shock.
Isolate power before conducting the indicated test
Hot surface or liquid. Personal Protective Clothing (PPE) must be worn to
reduce the risk of scalding.
General warning symbol. Observe the instructions accompanying the
symbol.

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
4
RHEEM & EVERHOT MODEL IDENTIFICATION
All identification numbers are designed to convey detailed information about the water
heater to which it is attached.
4
A
1
250
M
5
P
Cylinder Warranty
2 –Everhot
4 –Rheem
A –Stainless Steel
Heating Units
1 –Single Heating Unit
2 –Two Heating Units
Rated Delivery
Plant of Manufacture
Heating Unit Rating
4 –1800W
5 –2400W
7 –3600W
8 –4800W
P –Lead & Plug
Model number, serial number and date of manufacture should be quoted in all correspondence.
AQUAMAX MODEL IDENTIFICATION
E
50
S
24
SS
L
Cylinder Warranty
E –Aquamax
Rated Delivery
Heating Units
S –Single Heating Unit
T –Two Heating Units
24 –2400W
36 –3600W
SS –Stainless Steel
L –Lead & Plug

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
5
SPECIFICATIONS
Model
Rated Capacity
(Litres)
TPR Valve
Rating (kPa)
Max Inlet
Pressure (kPa)
Bottom T/stat
Setting (ºC)
Top T/stat
Setting (ºC)
Water Connections
With ECV
Without
ECV
Inlet
Outlet
TPR
2A1050M7
4A1050Mx
E50SxSS
50
1400
960
1120
60 ~ 80
-
RP¾/20
RP½/15
4A1080Mx
80
1400
960
1120
60 ~ 70
-
RP¾/20
RP½/15
4A1125Mx
125
1400
960
1120
60 ~ 70
-
RP¾/20
RP½/15
4A1160Mx
160
1400
960
1120
60 ~ 70
-
RP¾/20
RP½/15
2A1250M7
4A1250Mx
250
1000
680
800
60 ~ 70
-
RP¾/20
RP½/15
4A2250Mx
250
1000
680
800
60 ~ 70
60
RP¾/20
RP½/15
2A1315M7
4A1315Mx
315
1000
680
800
60 ~ 70
-
RP¾/20
RP½/15
4A2315Mx
315
1000
680
800
60 ~ 70
60
RP¾/20
RP½/15
x –Substitutes for element rating

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
6
PREVENTATIVE MAINTENANCE
Annual Service
It is suggested for peak performance that the water heater be serviced annually.
1. Check for discharge from the TPR valve. When the element is operating a small
discharge of water may be evident. Operate the valve-easing lever to ensure the valve
opens and resets properly. Always open and close the valve gently.
2. Check for discharge from the ECV if fitted. When the element is operating a small
discharge of water may be evident. Operate the valve-easing lever to ensure the valve
opens and resets properly. Always open and close the valve gently.
3. Check for leaks at all tank fittings.
4. Check for signs of excessive corrosion on the water heater jacket.
5. If an overflow tray is installed, check to ensure the overflow tray drain pipe is not
blocked.
6. Isolate power to the water heater and check all electrical connections for signs of
overheating due to poor connection.
7. Conduct an electrical insulation test on the water heater (refer to “Electrical Insulation
Testing” on page 24).
Major Five Year Service
It is recommended that a major five year service be conducted on the water heater.
1. Replace Temperature & Pressure Relief (TPR) valve.
2. Inspect and flush expansion control valve (if ECV fitted) and replace if required.
3. Check electric heating unit for excessive calcium build up or corrosion and replace
heating unit if required.
4. Visually check water heater for any potential problems.
5. Inspect all plumbing and electrical connections.

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
7
OPERATION
Water temperature is maintained via a thermostat switching the active conductor to an
electric immersion element positioned towards the bottom of the cylinder.
When the water temperature within the cylinder falls sufficiently, the thermostat contacts
close suppling power to the element.
Once the water temperature reaches the set point of the thermostat, the contacts open
cutting power to the element.
A double pole ‘manual reset’over temperature cut out is incorporated into the thermostat
to provide additional protection in the event the controlling thermostat contacts fail. The
ECO contacts open between 80ºC and 88ºC.
COMPONENTS AND THEIR FUNCTION
Temperature and Pressure Relief (TPR) Valve: A valve designed to provide automatic
relief by discharging water in case of excessive temperature, pressure or both.
Never fit a TPR Valve with a pressure rating greater than that indicated on
the product-rating label.
Pressure Limiting Valve (P.L.V.)
A valve that controls its outlet pressure to a predetermined limit.
Inlet Delivery Tube (Dip Tube)
A stainless steel tube installed in the cold water inlet of the water heater cylinder to assist
with stratification.
Diffuser
A device installed in the cold water inlet of the water heater cylinder to assist with
stratification.
Thermostat
A device, responsive to temperature, which controls the supply of electrical energy to the
element to maintain the stored water at the required temperature.
Over Temperature Energy Cut Out (E.C.O.)
A temperature-sensing device in combination with the thermostat that automatically cuts
off the supply of electrical energy to prevent excessive water temperature occurring. This
device will not reset automatically but may be manually reset once temperatures have
fallen to a safe level. DETERMINE CAUSE OF OPERATION.
Heating Unit (Element)
A tubular device containing an electric resistance element that converts electrical energy
to heat. Standard ratings are 1.8, 2.4, 3.6, and 4.8 kW.

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
8
WIRING DIAGRAMS
Single Element
Twin Element

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
9
PLUMBING DIAGRAMS
The following information and plumbing diagrams are provided as a guide only. For more
information refer to the relevant Installation Instructions.
Two Temperature Zone Plumbing Diagram
Circulated Flow & Return Plumbing Diagrams
For circulated hot water flow and return systems, a temperature limiting device can only be
installed on a dead leg which branches off the circulated hot water flow and return pipe.
Installing a temperature limiting device in the circulated flow and return
pipe work, or circulating tempered water from a temperature limiting device
may cause water to be delivered to ablution areas at a temperature
exceeding the requirements of AS/NZS 3500.4.

TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
10
Circulated Flow & Return Plumbing Diagrams (continued)