Rheem MPs Series User manual

This water heater must be installed and serviced by an authorised person.

Please leave this guide with the householder.

Installation Instructions

Air Sourced Split

Heat Pump Module

MPs Series

PATENTS

This water heater may be protected by one or more patents or registered designs

in the name of Rheem Australia Pty Ltd.

TRADE MARKS

®Registered trademark of Rheem Australia Pty Ltd.

™ Trademark of Rheem Australia Pty Ltd.

Note: Every care has been taken to ensure accuracy in preparation of this publication.

No liability can be accepted for any consequences,

which may arise as a result of its application.

Notice to Victorian Customers from the

Victorian Plumbing Industry Commission.

This water heater must be installed by a licensed person as required by

the Victorian Building Act 1993.

Only a licensed person will give you a Compliance Certificate, showing that

the work complies with all the relevant standards. Only a licensed person will

have insurance protecting their workmanship for 6 years. Make sure you use

a licensed person to install this water heater and ask for your Compliance

Certificate.

CONTENTS

HOUSEHOLDER –This installation instruction booklet is intended for

the installer but you may find it of interest.

Installation..............................................................................................4

Heat Pump And Tank Assembly.........................................................11

Connections –Electrical .....................................................................30

Commissioning....................................................................................32

Water Supplies.....................................................................................36

Warranty Note ......................................................................................39

INSTALLATION

THE HEAT PUMP MODULE OF THIS WATER HEATER IS FOR OUTDOOR

INSTALLATON ONLY.

The installation must comply with the requirements of AS/NZS 3500.4,

AS/NZS 3000 and all local codes and regulatory authority requirements. In New

Zealand, the installation must conform with Clause G12 of the New Zealand

Building Code.

This water heater is recommended for connection to a 24 hour per day power

supply.

All packaging materials must be removed from the heat pump module prior to

its installation. This includes the removal of the cardboard base of the carton

from the underside of the module.

STORAGE TANK AND HEAT PUMP MODULE

The heat pump water heater is made of two main components, the storage tank

and the heat pump module. For transport and handling (weight) purposes both

items are shipped separately. The water heater must not be operated until both

components are installed, connected and purged of air. Refer to “Heat Pump

and Tank Assembly” on page 11.

Take care when handling the heat pump module. The jacket of the heat pump

module needs to be handled gently so as not to cause damage.

Care must be taken during transportation and handling. Do not lay the

heat pump module down and do not tilt the heat pump module more than

30° from the vertical. This will displace the compressor lubricating oil. If the

heat pump module has been tilted more than 30° from the vertical during

handling, it will need one hour to drain back before the power to the water

heater can be switched on, otherwise damage to the compressor may result.

Warning: This heat pump module is designed to be installed with a purpose

built water heater storage tank and may not be used for any other purpose.

INSTALLATION

HEAT PUMP MODULE LOCATION

The heat pump module is suitable for outdoor installation only. The heat pump

module‟s position is to be chosen with noise, safety and service in mind. Make

sure people (particularly children) will not accidentally touch the air inlet louvres

and outlet grille and that they are clear of obstructions and shrubbery.

It is advisable to install the heat pump module away from bedroom or living

room windows as the system components can generate a level of noise whilst

they are operating. Consider the location in relation to neighbours‟ bedrooms

and living room windows.

Clearance must be allowed for servicing of the heat pump module. It must be

accessible without the use of a ladder or scaffold. Make sure the heat pump

module‟s top and front covers and system controls can be removed for service.

You must be able to read the information on the rating plate of the heat pump

module. Remember you may have to remove the heat pump module later for

servicing.

It is recommended the heat pump module be installed at ground or floor level

and must stand vertically upright.

The heat pump module must be installed against a wall and on a level slab or

solid base with a minimum size of 600 mm wide x 600 mm deep. The heat

pump module must be secured using the wall bracket and four feet brackets

provided. Refer to “Heat Pump and Tank Installation” on page 11.

A clearance of at least 300 mm is required perpendicular from both the side air

inlet louvres and the outlet grille to any wall or obstruction. Refer to the

dimensions diagram on page 9.

The heat pump storage tank and heat pump module must be installed within

four (4) metres of each other. The heat pump flow and return pipes connecting

the heat pump storage tank to the heat pump module must not exceed

four (4) metres in length each and must not contain more than 4 x 90º bends

each. All changes in direction of the pipe work must be made using bends. The

pipe work should not contain elbows.

The water heater must not be installed in an area with a corrosive atmosphere

where chemicals are stored or where aerosol propellants are released.

Remember the air may be safe to breathe, but the chemicals may attack the

materials used in the heat pump system.

INSTALLATION

Note

These instructions cover only the installation of the heat pump module and the

connections made between the heat pump module and storage tank. Refer to

the Owner‟s Guide and Installation Instructions supplied with the storage tank

for further information including:

where and how to locate the heat pump water heater

the dimensions of the heat pump water heater and any clearances

required from surrounding objects

how to connect the heat pump water heater to the electricity supply and to

the plumbing system

how to operate the heat pump water heater

what to do if something goes wrong.

FREEZE PROTECTION

The water heater has a freeze protection system. The freeze protection system

will protect the water heater from damage, by preventing ice forming in the

waterways of the water heater, in the event of freezing conditions occurring.

If the ambient air temperature falls below 4°C and the heat pump module is not

operating, the system will operate the circulator periodically. During this freeze

protection cycle, the circulator will operate for three (3) minutes and then rest

for fifteen (15) minutes, before the cycle is recommenced. Water is circulated

from the storage tank through the heat pump circuit, to prevent freezing in the

connecting pipe work and heat pump module.

Warning: In areas where the ambient air temperature may fall below 0°C,

power must be available to the water heater at all times to prevent freezing in

the heat pump circuit.

The system must be installed with the heat pump circuit hot and cold pipes fully

insulated with closed cell polymer insulation with a minimum thickness of

13 mm. Thicker insulation may be required to comply with the requirements of

AS/NZS 3500.4. The water heater has NO WARRANTY for freeze damage if

the heat pump circuit hot and cold pipes are not suitably insulated or if power is

unavailable at the water heater.

INSTALLATION

MAINS WATER SUPPLY

Where the mains water supply pressure exceeds that shown in the table below,

an approved pressure limiting valve is required. Refer to the Owner‟s Guide

and Installation Instructions supplied with the storage tank for the position of

the pressure limiting valve.

Model

270, 325, 410

Relief valve setting

1000 kPa

Expansion control valve setting *

850 kPa

Max. mains supply pressure

With expansion control valve

680 kPa

Without expansion control valve

800 kPa

Min. mains supply pressure

200 kPa

* Expansion control valve not supplied with the water heater.

A minimum water supply pressure of 200 kPa is required to enable the heat

pump circulator and heat pump system to operate effectively.

TANK WATER SUPPLY

If the water heater is supplied with water from a tank supply and a minimum

water supply pressure of 200 kPa at the water heater cannot be achieved, then

a pressure pump system must be installed to allow the heat pump circulator to

operate and avoid air locks in the circuit. Care must be taken to avoid air locks.

The cold water line from the supply tank should be adequately sized and fitted

with a full flow gate valve or ball valve.

PURGING AIR FROM THE SYSTEM

The water heater system must be purged of air prior to operation, using the

manual air bleed valve supplied on the storage tank. Failure to bleed the air out

of the connecting pipe work and heat pump module will result in non-operation

of the circulator and failure of the heat pump to operate due to overheating.

INSTALLATION

CONDENSATE DRAIN

A drain line must be fitted to the heat pump module‟s condensate drain to carry

the discharge clear of the water heater. The drain line can be extended using

12 mm rigid poly hose or conduit. The pipe work from the condensate drain

should be as short as possible, and fall all the way from the water heater with

no restrictions. It should have no more than three right angle bends in it. The

outlet of the drain line must be in such a position that flow out of the pipe can

be easily seen - but arranged so water discharge will not cause damage or

nuisance.

The condensate drain line must not be connected to the relief valves

drain lines but may discharge at the same point.

WARNING

This water heater is only intended to be operated by persons who have the

experience or the knowledge and the capabilities to do so. This water heater is

not intended to be operated by persons with reduced physical, sensory or

mental capabilities, i.e. the infirm, or by children. Children should be supervised

to ensure they do not interfere with the water heater.

This water heater uses 240 V AC electrical power for operation of the control

systems and the electrically operated components. The removal of the access

cover(s) will expose 240 volt wiring. They must only be removed by an

authorised or qualified person.

ENVIRONMENT

At the end of the service life of the heat pump water heater and prior to the

water heater being disposed of, a person qualified to work with refrigerants

must recover the refrigerant from within the sealed system. The refrigerant

must not be vented to atmosphere. Phone your nearest Rheem Service

Department or Accredited Service Agent to arrange for an inspection.

INSTALLATION

DIMENSIONS AND TECHNICAL DATA

HEAT PUMP DIMENSIONS - REMOTE

325 LITRE STORAGE TANK

HEAT PUMP DIMENSIONS - REMOTE

325 LITRE STORAGE TANK

elevation plan view

Heat pump module models

180536 (R)

180540 (E)

Maximum rated power input

watts

3600

Rated heat pump power input

watts

800

Booster element ratings

2.4, 3.6

Refrigerant type

R134a

Refrigerant circuit pressure

kPa

3000

Mass heat pump module

Storage tank capacity

litres

270

325

410

Boost capacity*

litres

180

200

Mass tank empty

112

Mass tank full

341

413

522

* The boost capacity of a low watts density or other than a 2.4 kW or 3.6 kW heating unit,

if used, is 100 litres (270 and 325 litre storage tanks) or 125 litres (410 litre storage tank).

Technical data is subject to change.

INSTALLATION

TYPICAL INSTALLATON –OUTDOOR LOCATION

TYPICAL INSTALLATION

HEAT PUMP WATER HEATER - REMOTE

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