Rinnai EHP32 Quick start guide

Hoto hot water heat

pump

Operation and installation guide

Model: EHP32

This appliance shall be installed in accordance with:

- Manufacturer’s installation instructions

- Local regulations and municipal building codes

Installation, servicing and repair shall be carried out only by

authorised personnel.

Installer, please leave this manual with the customer for

future reference.

Warning

Improper installation, adjustment, alteration, service or

maintenance can cause property damage, personal injury

or loss of life.

For more information about buying, living and servicing

of Rinnai appliances call: 0800 RINNAI (0800 746 624)

Rinnai New Zealand Limited

105 Pavilion Drive, Mangere, Auckland

PO Box 53177, Auckland Airport, Auckland 2150

Phone:(09) 257 3800, Fax: (09) 257 3899

Email: [email protected]

Web: www.rinnai.co.nz, youtube.com/nz

Important:

cnt:

Suitability 4

Warning about hot water 5

Safety information 6

How it operates 7

Turning the system off and on 8

General information 9

Troubleshooting guide 10

Speciﬁcation 11

Dimensions and clearances 12

Heat pump checklist 13

Connecting to a storage tank 14

Attaching the temperature sensor 15

Piping 16

Filling and commissioning 17

Protection against freezing 18

Handover to the customer 18

Draining instructions 19

Limited warranty 20

Installer details 22

Proof of purchase 23

4 | Hoto hot water heat pump operation & installation 11790-C 03-12

Suitability

Suitable for:

- external domestic applications

- connection to mains pressure hot water cylinders

- NZ geographical zones 1 and 2 only, refer map below

*RADIUS

Zone 1

Zone 2

Zone 3

Not suitable as a spa or swimming pool heater.

Water quality

Not suitable for certain water chemistries. For further information, refer to the warranty information at the back

of this guide.

Geothermal hot spots

The Rinnai Hotﬂo hot water heat pump is not warranted against corrosion in geothermal areas such as Rotorua,

where high levels of sulphur dioxide are present in the atmosphere.

Distance between the heat pump and storage tank

If the heat pump and storage tank are more than 5 m apart an R5043 adjustable ﬂow restrictor must be

purchased as a separate item to complete installation.

IMPORTANT

Hoto hot water heat pump operation & installation 11790-C 03-12 | 5

Warning about hot water

Water temperatures above 55 °C can cause instant severe burns, such as scalding

and may even result in death. Those most at risk; children, disabled, elderly, and the

sick. Hot water at 65 °C, a common water temperature in New Zealand, can severely

burn a child in less than half a second. At 55 °C it takes half a minute.

Always

- Test the water temperature with your elbow before placing your child in the

bath and feel the water yourself before bathing or showering

- Supervise children whenever they are in the bathroom

- Make sure the hot water tap is turned off

Consider

Installing child proof tap covers or child resistant taps, both will prevent a child being

able to turn on the tap.

Never

Leave a toddler in the care of another child. They may not understand the need to

have the water temperatures set at a safe level.

6 | Hoto hot water heat pump operation & installation 11790-C 03-12

Supervise children

Children should be supervised to

ensure they DO NOT play with the

appliance.

Electrical

Access covers of the water heating

system components conceal 230 V

wiring and must only be removed

by an authorised person.

The power lead from the heat

pump must be plugged into an

external weatherproof electrical

outlet. If the power supply cord is

damaged, it must be replaced by

an authorised person in order to

avoid a hazard, using a genuine

replacement part available from

Rinnai. Take care not to touch any

power plugs with wet hands.

Pipe work may be hot

Care should be taken not to touch

the pipe work as it may be hot.

DO NOT

Do not:

- Place articles on or against this

appliance

- Store chemicals or ﬂammable

materials near this appliance

- Operate with the panels or

covers removed from this

appliance

- Activate the heat pump unless

the tank is full of water

- Insert ﬁngers or objects into

the air inlet/outlet—when the

fan is rotating at high speed it

can cause an injury

Never use ﬂammable sprays

Never use a ﬂammable spray such

as hair spray, lacquer, paint etc.

near this unit as this may cause a

ﬁre.

Safety information

This appliance is not intended for use by persons (including children) with reduced

physical, sensory or mental capabilities, or lack of experience and knowledge, unless

they have been given supervision or instruction concerning use of the appliance by

a person responsible for their safety.

WARNING

Hoto hot water heat pump operation & installation 11790-C 03-12 | 7

How it operates

The heat pump operates by transferring the energy from the ambient outside air into the

water. Electricity is used to operate the system, but not to heat the water, so less electricity is

used.

The Rinnai hot water heat pump is made up of two separate components; a heat pump and a water storage

tank. The heat pump unit includes a circulation pump which draws water from the storage tank and returns it to

the tank at a higher temperature. A temperature sensor in the tank is used to control the heat pump operation.

Water from storage

tank to heat pump

Outlet air

Water from heat pump

to storage tank

Storage tank

temperature

sensor lead

Rear of heat pump unit

Inlet ambient air

Front of heat pump unit

8 | Hoto hot water heat pump operation & installation 11790-C 03-12

Turning the system o󱐯 and on

Turning the water heating system off

If you plan to be away for only a few nights, we suggest you leave the water heating system switched on. If it is

necessary to switch it off, switch off the electric power supply to the heat pump unit.

Do not turn the power off to the heat pump unit if snow or frost conditions are expected as

components in the system may be damaged by freezing. If power needs to be turned off, or power

failure occurs and freezing conditions are expected, the water needs to be drained from the heat pump

unit, this must be carried out by an authorised person. It is not necessary to drain the storage tank.

Turning the water heating system on

Switch on the electric supply to the heat pump unit. Water heating will now occur as required. It may take a

number of hours before hot water is available.

WARNING

Hoto hot water heat pump operation & installation 11790-C 03-12 | 9

General information

Defrosting function

The heat pump has an inbuilt defrosting function. This requires power to prevent damage in freezing conditions.

DO NOT disconnect the power if there is a likelihood of freezing without draining the unit.

Draining and ﬁlling

Draining and ﬁlling of the complete system normally only occurs during installation or servicing and must be

carried out by an authorised person.

Draining water from the heat pump unit is necessary if the power will be shut off to the unit, and snow or frost

conditions are expected (it is not necessary to drain the storage tank). Arrange for an authorised person to carry

out this task.

Servicing

Rinnai has a maintenance/service and spare parts network with personnel who are fully trained and equipped

to give the best advice on your Rinnai appliance. If your system needs maintenance and/or servicing, please call

Rinnai (0800 746 624) from a land line and select option one for a service centre in your area.

For reliable operation Rinnai hot water systems should be serviced every two years. Regular maintenance and

servicing is not covered by the Rinnai warranty.

Do not attempt to carry out any work on your system other than that mentioned in the troubleshooting section.

If you have any faults or problems, contact your installer or call Rinnai.

10 | Hoto hot water heat pump operation & installation 11790-C 03-12

Troubleshooting guide

Lack of hot water, or no

hot water

Is there electricity supply to the

heat pump?

Check that the heat pump is

plugged into the power point and

turned on—the compressor will

start approximately three minutes

after the power is turned back on.

Check that the isolating switch

marked ‘Hot Water’ or ‘Water

Heater’, at the meter box, is

switched on. Check also any

isolating switches installed near

the water heater are switched on.

Check the fuse or circuit breaker

marked ‘Hot Water’ or ‘Water

Heater’ at the meter box.

Repeated failure of the fuse or

tripping of the circuit breaker

indicates a fault that must be

investigated by an authorised

tradesperson.

Are you using more hot water

than you think?

Often you don’t realise how

much hot water is actually being

used, especially when showering.

Typical ﬂow rates for showers is

around 8-10 litres per minute.

Conduct a simple experiment by

placing a measured bucket under

your shower for ten seconds

and multiply by six to obtain the

amount of water produced over a

minute.

If your result is signiﬁcantly more

than the rates above, you may

want to consider installing ﬂow

restrictors. These are available at

all good plumbing outlets.

Cold water relief valve

discharging continuously?

It is normal for the cold water

relief valve to discharge a small

quantity of water through the

drain line while the heat pump

is operating to heat the water. If

water is discharging continuously

when the heat pump is not

operating, there may be a fault

with one of the valves—contact

your installer to discuss.

High electricity bills

If you think your electricity bill is

too high, check:

- The electricity tariff on your

last bill, has this changed from

previous bills?

- If the cold water relief valve is

discharging continuously.

- Water usage, has this

increased (guests, winter etc.)

- Temperature probe/sensor is

installed as per instructions on

page 15.

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