Solahart TM096A Istruzioni operative

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

PowerStore Grid Interactive

Electric Water Heater

TM096A

Issued: Dec 2021

REV: AA

Issued: Aug 22

250E5X36

315E5X36

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions 
REV AA: Issued 22/08/2022 
 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled” 
2 
CONTENTS 
 
INTRODUCTION .................................................................................................................3 
SAFETY WARNINGS..........................................................................................................3 
GLOSSARY OF ACRONYMS .............................................................................................5 
MODEL IDENTIFICATION...................................................................................................5 
SPECIFICATIONS...............................................................................................................6 
INSTALLATION...................................................................................................................6 
PREVENTATIVE MAINTENANCE ......................................................................................7 
COMPONENTS AND THEIR FUNCTION ...........................................................................9 
System Components........................................................................................................9 
Heater Components.........................................................................................................9 
Heater Component Overview Diagram..........................................................................11
PRODUCT CHANGES ......................................................................................................12 
EMI Filter Wiring Harness Discontinuation.....................................................................12
Software Changes .........................................................................................................12
WIRING DIAGRAMS .........................................................................................................13 
Water Heater Wiring Diagram –All Models ...................................................................13 
Water Heater Wiring Harness –All Models....................................................................14
PLUMBING DIAGRAM ......................................................................................................14
OPERATION......................................................................................................................15 
Operating Instructions....................................................................................................15
Basic System Overview.................................................................................................16 
Sequence of Operation..................................................................................................17
Operational Flow Charts................................................................................................23
MASTER CONTROLLER ..................................................................................................32 
LED INDICATION..............................................................................................................33 
FAULT FINDING................................................................................................................34
Common Complaints .....................................................................................................34 
Confirming Powerstore Communications.......................................................................36
Fault Indication...............................................................................................................37
Fault Code Table ...........................................................................................................38
Fault Diagnosis Sequence –Fault Finding Charts.........................................................39
FAULT FINDING TESTS...................................................................................................61 
COMMISSIONING PROCEDURE.....................................................................................65 
COMPONENT ADJUSTMENT PROCEDURES ................................................................66 
Adjusting the Temperature Limiting Valve .....................................................................66 
Mechanical Thermostat Temperature Adjustment .........................................................67 
Resetting Mechanical Thermostat ECOs.......................................................................67
COMPONENT REPLACEMENT PROCEDURES .............................................................69 
DOCUMENT REVISION HISTORY...................................................................................80
 
 

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

INTRODUCTION

The information provided in these instructions is based on the water heater being installed

and commissioned in accordance with the Installation Instructions provided with each water

heater.

Should you require further technical advice on a Solahart PowerStore Grid Interactive

Electric Water Heater contact Rheem Technical Support on 1300 712 863.

SAFETY WARNINGS

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 Solahart PowerStore Grid Interactive 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.

Isolate power before conducting the indicated test.

Hot surface or liquid. Personal Protective Clothing (PPE) shall be worn to

reduce the risk of scalding.

General warning symbol. Observe the instructions accompanying the

symbol.

Live Testing

A number of test procedures detailed within this document require ‘live’

testing to be conducted.

All State and Territory Authorities stipulate requirements that must be met

before working live i.e. conducting a risk assessment and/or preparing a

safe work method statement and wearing appropriate PPE.

It is the responsibility of the service person to be aware of and comply

with the requirements of the State or Territory where the water heater is

installed before working ‘live’.

Under certain fault conditions it is possible for the metal jacket of a water

heater to become live. To check for a shock hazard in a suspect

installation, a Touch Voltage Test must be performed (refer page 4).

Heater Safety Warnings

This product contains electronic components that are sensitive to

electrostatic discharge (ESD). Appropriate precautions shall be taken to

prevent damage to electronic components.

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

Touch Voltage Testing

Under certain fault conditions it is

possible for the metal jacket of a

water heater to become live. The

electrical fault may be an internal

appliance issue or an issue with

the premises wiring.

In the example opposite, the

appliance metal jacket has

become live due to the appliance

active wire touching the metal

frame.

To check for a shock hazard in a suspect installation, a Touch Voltage Test must be

performed using the following equipment:

1. A high impedance multimeter with an input impedance greater than 5 Megaohm.

2. A 2 kΩ resistor box fitted with contact terminals (the 2 kΩresistor is used to simulate the

body resistance of a typical person).

3. A long trailing lead for connection to the premises earth electrode.

Procedure

Personal Protective Equipment (electrical insulating gloves) should be

worn when conducting this procedure toreduce the risk of electric shock.

1. Connect resistance box between metal casing of appliance and premises main earth

electrode (spike) using the long trailing lead (as depicted above).

2. Connect multimeter (set on AC voltage scale) to resistor box terminals and record

reading.

3. If reading is higher than 50 VAC (dry) or 25 VAC (wet), then there is a fault either with

the premises wiring or with the appliance.

4. To confirm earthing of the appliance:

•Electrically isolate appliance from electrical circuit.

•Conduct an earth continuity test to AS/NZS 3760 (pay particular attention to the

cordset earth on plug-in water heaters).

•If the earth continuity test is ok (≤0.5 ohms), the problem is with the premises wiring.

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

GLOSSARY OF ACRONYMS

CFH –Call for heat.

CT –Current transformer.

ECM –External Control Mode.

EMU –Energy management unit.

ECV –Expansion control valve.

GIEWH –Grid interactive electric water heater.

HEMS –Home energy management system.

N/A –Not applicable. Depending on context may also mean not fitted or not relevant.

N/C –Normally closed i.e. normally closed contact.

N/O –Normally open i.e. normally open contact.

O/C –Open circuit.

PLT –Powerline telecommunication (communication via heater power supply wiring).

PLV –Pressure limiting valve.

PV –Photovoltaic.

PCB –Printed circuit board.

S/C –Short circuit.

T&PR –Temperature and pressure relief valve.

TLV –Temperature limiting valve.

MODEL IDENTIFICATION

All identification numbers are designed to convey detailed information about the water

heater to which it is attached. Model number, serial number and date of manufacture should

be quoted in all correspondence.

250

250 –250 Litres Storage Capacity

315 –315 Litres Storage Capacity

E –Electric

5 –Temperature Limiting Valve Fitted

X –10 Year Cylinder Warranty *

36 –3.6 kW

* When installed in a single-family domestic dwelling. Refer to Warranty section in Owners Guide and

Installation Instructions supplied with heater for terms and conditions.

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

SPECIFICATIONS

General

Model

250E5

315E5

Rated Capacity

250 L

315 L

Maximum Water Supply Pressure (1)

With ECV

680 kPa

Without ECV

800 kPa

Water Connections

Cold Water Inlet

G¾B

Hot Water Outlet

G¾B

T&PR

RP½/15

Electrical

Power Supply

220 ~ 240 VAC 50 Hz Hard Wired

Nominal Power Max

3.6 kW

Nominal Current Max

15 A

Water Temperature Setting (2)

70°C ~ 83°C

Temperature Limiting Valve

Yes

Communication Protocols (using PLT)

TCP/IP

(1) Where the mains water supply pressure exceeds the values shown, an approved pressure limiting valve is

required.

(2) 70°C during normal operation via master controller. 80°C (± 3°C) via mechanical thermostats when operating

in independent legionella sterilisation mode or critical fault mode.

Water Heater Components

Model

250E5

315E5

Anode

1 x 1140 mm

1 x 1395 mm

Temperature Limiting Valve Outlet Temperature

50⁰C

T&PR Valve

1000 kPa

Master Controller

Solahart

Top Heating Unit (3)

Element 1 Rating

3600 W

Bottom Heating Unit (3)

Element 1 Rating

500 W

Element 2 Rating

1000 W

Element 3 Rating

2000 W

Temperature Sensor Strip (Temp Sensors TH1 ~ TH5)

Refer to table on page 62

Legionella Temperature Sensor TH7 (4)

Refer to table on page 61

Bottom Temperature Sensor TH9 (4)

Top Mechanical

Thermostat

Make

Robertshaw ST1205134D80 (select)

Nominal Setting

Opens 80°C ± 3°C. Closes @ 72⁰C ± 2°C

ECO

Trips @ 87 ~ 93°C. Manual reset @ 82°C

Bottom Mechanical

Thermostat

Make

Robertshaw ST1205134D80 (select)

Nominal Setting

Opens 80°C ± 3°C. Closes @ 72⁰C ± 2°C

ECO

Trips @ 87 ~ 93°C. Manual reset @ 82°C

(3) Only one heating unit can operate at a time (maximum 3600 W).

(4) Single unit dual sensor comprised of bottom temperature sensor TH9 and legionella temperature sensor

TH7.

INSTALLATION

Solahart PowerStore Grid Interactive Electric Water Heaters are suitable for indoor or

outdoor installation and must be installed in accordance with AS/NZS 3000,

AS/NZS 3500.4, all local codes and regulatory authority requirements and the Installation

Instructions supplied with the water heater and any ancillary components.

Note: If the water heater is installed without an EMU, or power meter, or connection to a

home energy management system (HEMS), then it will operate as a conventional twin

element electric water heater only, with a setpoint of 70⁰C with element switching performed

by the heater’s master controller according to TH1 sensor for top element heating, and TH9

for bottom element heating.

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

PREVENTATIVE MAINTENANCE

Servicing must be performed by a suitably qualified person.

Annual Service

It is suggested for peak performance that the water heater be serviced annually.

1. Check for discharge from the T&PR 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. Visually check the unit for any potential problems.

6. If a safe tray is installed, check to ensure the drain pipe is not blocked.

7. Ensure master controller fins have adequate airflow and are free of insects/debris.

8. Isolate power to the water heater and check all electrical connections for signs of

overheating due to poor connection.

9. Remove TLV and clean or replace TLV cold water inlet strainer, non-return valve and

hot water inlet strainer, then reinstall TLV. Refer to component replacement procedure

15 on page 76.

10. Check and adjust TLV if required. Refer to ‘Adjusting the Temperature Limiting Valve’

on page 66.

11. Contact CET Support by texting your mobile number to 0488 824 202 requesting a call

back to assist in confirming that there are no faults present and that the water heater is

functioning correctly.

Major Five Year Service

It is recommended that a major five year service be conducted on the water heater.

Note: The five year service androutine replacement of any components, such as the anode,

relief valve(s) and TLV, are not included in the Solahart warranty. A charge is to be made

for this work. Only genuine replacement parts should be used on the water heater.

1. Replace the T&PR valve. Refer to component replacement procedure 13 on page 75.

2. Replace the TLV. Refer to component replacement procedure 15 on page 76.

3. Inspect and flush the expansion control valve (if fitted). If required, replace the valve.

4. Inspect and if required, replace the anode.

5. For water supplies which are either softened or desalinated, or where the water supply

may alternate between a water tank and a reticulated public supply or another supply,

or where there is a variable supply (e.g. from a bore or public reticulated supply from

various water sources), the anode must be inspected (and replaced if there is any sign

of depletion) within five years of installation, and within every five years thereafter.

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

For all water supplies, if the anode is not replaced during a major service then in any

event, the anode must be replaced at ten years. Refer to the 'Anode Inspection and

Replacement' section in the Owner’s Guide and Installation Instructions for full details.

6. Check electric heating units for excessive calcium build up or corrosion and replace if

necessary.

7. Check for leaks at all tank fittings.

8. Check for signs of excessive corrosion on the water heater jacket.

9. Visually check the unit for any potential problems.

10. If a safe tray is installed, check to ensure the drain pipe is not blocked.

11. Ensure master controller fins have adequate airflow and are free of insects/debris.

12. Isolate power to the water heater and check all electrical connections for signs of

overheating due to poor connection.

13. Restore power.

14. Contact CET Support by texting your mobile number to 0488 824 202 requesting a call

back to assist in confirming that there are no faults present and that the water heater is

functioning correctly.

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

COMPONENTS AND THEIR FUNCTION

System Components

Grid Interactive Electric Water Heater (GIEWH): The PowerStore GIEWH provides a

means of storing energy by heating water utilising special grid tariffs and/or excess power

from a PV system (if a PV system is installed). The GIEWH reports the heater’s tank charge

and status to the EMU via PLT communication, and the EMU reports to the web monitoring

service via ethernet connection to the premises modem. Note: If the GIEWH is installed

without an EMU, or power meter, or connection to a home energy management system

(HEMS), then it will operate as a conventional twin element electric water heater only.

Energy Management Unit (EMU): A third-party electronic device utilised to communicate

site specific and system status information with a third-party web monitoring service (such

as CET onWatch portal). The EMU can also monitor the flow of power to and from the

premises using a power meter and send heating requests to the heater to self-consume

solar energy generated if a PV system is installed or if special grid tariffs are available.

Power Meter: A third-party electronic device utilised to monitor the flow of power to and

from the premises (from premises only if a PV system is installed).

Home Energy Management System (HEMS): A combination of hardware and software

that allows the user to automatically monitor and control energy production and usage in a

premises. For GIEWHs, this is typically the EMU & power meter.

Heater Components

Master Controller: An electronic device utilised to control water heater operation during

normal operation. Refer to 'Master Controller' on page 32 for more information.

Current Transformer (CT): An electrical device inside the master controller utilised for

water heater power consumption measurements.

Heating Units: A tubular device containing electric resistance elements that convert

electrical energy to heat. Each GIEWH has two heating units; one heating unit is located in

the top section of the tank and the other near the bottom of the tank. Only one heating unit

can be energised at a time.

The top heating unit has a single 3600 W element. The bottom heating unit has three

elements; 500 W, 1000 W and 2000 W.

Temperature Sensors: Thermistor type sensors are utilised to sense the water temperature

at various locations against the storage tank face and are monitored by the master controller.

The resistance value of each sensor will change according to the detected temperature, and

the master controller utilises the resistance value, which has a corresponding temperature

value, to determine mode of operation. There are seven temperature sensors that are

located at the following positions on the storage tank:

•Bottom/legionella temperature sensor. This is a single unit dual sensor comprised of

bottom temperature sensor TH9 and legionella temperature sensor TH7. The sensor is

fitted to a clip attached to the bottom mechanical thermostat and connects to the master

controller via a plug-in ribbon cable. Bottom temperature sensor TH9 is utilised for bottom

heating unit monitoring/control and controller legionella sterilisation monitoring/control.

Legionella temperature sensor TH7 is utilised for independent (backup) legionella

sterilisation monitoring/control.

TM096A PowerStore Grid Interactive Electric Water Heater Service Instructions

REV AA: Issued 22/08/2022

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”

•Temperature sensor strip comprised of five sensors (temperature sensors TH1 ~ TH5)

and a 10 Kilo ohm resistor. Utilised for tank heat monitoring and heating calculations and

located in a vertical aluminium duct in contact with the cylinder wall. The temperature

sensor strip connects to the master controller via a plug-in ribbon cable.

Mechanical Thermostats: During normal operation, the water

temperature is maintained by the master controller which utilises

temperature sensors to determine the water temperature at

various locations in the storage tank.

Top and bottom mechanical thermostats are also fitted to the

water heater and are utilised to control the water temperature if

the master controller enters independent legionella sterilisation

mode or critical fault mode. Each thermostat's controlling

contacts are set at 80°C and MUST NOT be altered (yellow dial).

Each mechanical thermostat has an integral double pole manual reset over temperature cut-

out (ECO) to provide additional over temperature protection in case the mechanical

thermostat controlling contacts fail.

The ECO contacts open at 87 ~ 93ºC. The ECO will not reset automatically and must be

manually reset by pressing and releasing the ECO reset button after temperatures have

fallen to a safe level (≤ 82°C). DETERMINE CAUSE OF OPERATION.

Temperature and Pressure Relief (T&PR) Valve: A valve designed to provide automatic

relief by discharging water in case of excessive temperature, pressure or both.

Never fit a T&PR valve with a pressure rating greater than that indicated on

the product rating label.

Expansion Control Valve (ECV): A valve designed to provide automatic relief by

discharging water in case of excessivepressure. Commonly utilisedin areas with poor water

quality in which case the pressure relief valve provides a safety back up.

The expansion control valve pressure rating must not exceed 80% of the

T&PR valve rating

Temperature Limiting Valve (TLV): A valve that controls its outlet temperature to a preset

value. The TLV mixes cold water with hot water from the cylinder hot water outlet to provide

a hot water outlet temperature not exceeding 50⁰C.

Pressure Limiting Valve (PLV): A valve that controls its outlet pressure to a predetermined

limit.

Outlet Delivery Tube (Dip Tube): A plastic tube installed in the hot water outlet of the water

heater cylinder to conduct water from the highest point to the outlet connection. It also acts

as a fitting liner.

Inlet Diffuser: A plastic device installed in the cold water inlet of the water heater cylinder

to assist with stratification. It also acts as a fitting liner.

Fitting Liner: A plastic tube installed in the cold-water inlet of the water heater to provide

protection against corrosion throughout the life of the water heater.

Anode (Sacrificial): A metal alloy electrode installed in the water heater cylinder that by

galvanic action protects the cylinder from corrosion.

Rating Label: The rating label details the model number, serial number and other

specifications and is located on the left hand side of the water heater above the T&PR valve.

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