Rheem MPi Series User manual

This water heater must be installed and serviced by a qualified person.

Please leave this guide with the householder.

Installation Instructions

Air Sourced Integrated

Heat Pump Module

MPi 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.

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.........................................................13

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

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

Water Supplies.....................................................................................38

Warranty Note ......................................................................................40

INSTALLATION

INSTALLATION STANDARDS

The water heater must be installed:

by a qualified person, and

in accordance with the installation instructions, and

in compliance with Standards AS/NZS 3500.4, AS/NZS 3000 and all local

codes and regulatory authority requirements.

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

Zealand Building Code.

WATER HEATER APPLICATION

This water heater is designed for use in a single family domestic dwelling for

the purpose of heating potable water. Its use in an application other than this

may shorten its life.

If this water heater is to be used where an uninterrupted hot water supply is

necessary for the application or business, then there should be redundancy

within the hot water system design. This should ensure the continuity of hot

water supply in the event that this water heater was to become inoperable for

any reason. We recommend you provide advice to the system owner about

their needs and building backup redundancy into the hot water supply system.

This water heater is recommended for connection to a minimum 16 hour per

day power supply for a 325 litre storage tank and a 24 hour per day power

supply for a 410 litre storage tank.

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 and designed to be assembled at the installation

site. The water heater must not be operated until both components are

assembled. Refer to “Heat Pump and Tank Assembly” on page 13.

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.

INSTALLATION

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

heat pump module down and do not tilt the heat pump module or the heat

pump and storage tank assembly more than 30° from the vertical. This will

displace the compressor lubricating oil. If the heat pump module or heat pump

and storage tank assembly 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.

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.

A clearance of 300 mm is required perpendicular from both the front air inlet

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

diagram on page 9.

The heat pump module must be installed on and fully supported by a stable

base.

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.

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.

Note

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

storage tank 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

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.

SAFE TRAY

Where damage to property can occur in the event of the water heater leaking,

the water heater must be installed in a safe tray. Construction, installation and

draining of a safe tray must comply with AS/NZS 3500.4 and all local codes

and regulatory authority requirements.

INSTALLATION

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 1°C and the heat pump is not

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

protection cycle, the circulator will operate for thirty (30) seconds 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. The green LED will flash a series

of four (4) flashes whilst the circulator is operating.

The water heater has NO WARRANTY for freeze damage if power is

unavailable at the water heater.

Warning: In areas where the ambient air temperature may fall below 1°C,

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

the heat pump circuit.

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

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.

INSTALLATION

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.

CONDENSATE DRAIN

A drain line should 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 a 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 Rheem Service or their nearest

Accredited Service Agent to arrange for an inspection.

INSTALLATION

TO TURN OFF THE WATER HEATER

To turn off the water heater:

Switch off the electrical supply at the isolating switch to the water heater.

Close the cold water isolation valve at the inlet to the water heater.

Notes

The freeze protection system will be rendered inoperable if electrical

power is not available at the water heater.

Damage caused by freezing due to the unavailability of power at the water

heater is not covered by the Rheem warranty.

Refer to “Warranty Note” on page 40.

If the power has been switched off to the water heater and there is a risk of

freezing, then it is necessary to drain the water heater.

Refer to “Draining the Water Heater” in the Owner‟s Guide and Installation

Instructions supplied with the heat pump storage tank.

VICTORIAN CUSTOMERS

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.

INSTALLATION

DIMENSIONS AND TECHNICAL DATA

300 MIN

ELECTRICAL

CONNECTION

VENTILATION

CLEARANCE

1018

574

HOT

OUTLET

COLD

INLET

544

872

K275

100

WALL

AIR

INLET

AIR INLET

AIR

OUTLET

300 MIN

VENTILATION

CLEARANCE

CONDENSATE DRAIN

TPR

VALVE

AIR INLET

AIR

OUTLET

300 MIN

HEAT PUMP DIMENSIONS

325 & 410 INTEGRATED

SK6753 - 1 A4

REV CD 04/13

Rheemglas 551 Series

INSTALLATION

1018

574

544

872

100

WALL

AIR

INLET

AIR INLET

AIR

OUTLET

300 MIN

CONDENSATE DRAIN

TPR

VALVE

AIR INLET

AIR

OUTLET

300 MIN

HEAT PUMP DIMENSIONS

325 & 410 INTEGRATED

SK6898-3 A4

REVCD 04/13

VENTILATION

CLEARANCE

300 MIN

VENTILATION

CLEARANCE

HOT

OUTLET

COLD

INLET

ELECTRICAL

CONNECTION

275

RheemPlus 554 Series

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