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:[phone], Fax: [phone]
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
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.

Hoto hot water heat pump operation & installation 11790-C 03-12 | 11
Specication
System specifications Rinnai split heat pump water heater: Model EHP32
Max. pipe length between heat
pump & storage tank (installer to
supply)
For each pipe Refer page 16
EHP32 heat pump unit Rated input 1.9 kW
Max. water pressure 850 kPa
Max. energy output (this is the max. possible
from the unit and should be used to ensure
tank TPR valve is suitably sized)
6.0 kW
Refrigerant type/mass R134A/750 g
Ingress protection IP24
Net weight 60 kg
Noise level Fan approx. 55 dB(A)
Power supply 240 V, 50 Hz
Start up protection
When the power is first turned on to the heat pump or when power is cut
then restored, the unit will not start for three minutes, this is to protect
the compressor.
Ambient temperature operating range (-7 to 45 °C)
When the ambient temperature is below 2 °C the tank temperature
achieved may be lower. When the ambient temperature is high, the air
supply fan will run at a lower speed.
Defrosting function
The heat pump has protection systems that will stop the operation of the
unit if; the air inlet/outlet is blocked, voltage is out of nominal range
(207-255 V), over pressure or over temperature in the refrigerant system.
Refrigerant compressor oil
Type: Neo 32, quantity: 520 ml
Cylinder settings
Pressure Limiting Valve (PLV) 500 kPa
Cold water pressure relief 700 kPa
Temperature & Pressure Relief Valve 850 kPa
Please note:
Installer may need to change the existing valves on the cylinder to meet these kPa ratings

12 | Hoto hot water heat pump operation & installation 11790-C 03-12
Dimensions and clearances
500
765 660 600
325
275
790
1500
300
003002
Bleed
Valves
Heat Pump Unit
Minimum Clearances

Hoto hot water heat pump operation & installation 11790-C 03-12 | 13
Heat pump checklist
FMinimum clearances maintained for correct operation and access.
F500 mm clearance above the unit.
FSuitably drained catch pan installed where leakage could cause damage.
FPositioned in a location where noise from operation will not disturb occupants or neighbours, particularly
overnight.
F10 A weatherproof 3-pin socket installed within 1.5 m of the connection of the heat pump.
DO NOT hard wire this appliance. Costs associated with disconnecting from hard wiring are not
covered by warranty.
FTemperature sensor cable run between the heat pump and storage tank. The supplied cable has a length of
9.5 m.
FMaximum water pressure is 850 kPa.
FIf water drips from the compressor are not acceptable, a plastic drain elbow (supplied) is fitted to the bottom
of the unit (as shown below), and a drain line is installed and run to a suitable disposal point.
FStorage tank valves and water temperature delivery must be in accordance with G12/AS3500.
Heat pump and tank less than 5 m apart
FSupplied flow restrictor installed at heat pump outlet, and pump set to speed 3.
Heat pump and tank greater than 5 m apart
FRinnai part number R5043 flow restrictor installed and adjusted to 3 litres per minute with a suitable pump
speed.
IMPORTANT

14 | Hoto hot water heat pump operation & installation 11790-C 03-12
Connecting to a storage tank
Connecting to a Rinnai Hotflo storage tank
The riser and dip tubes in the Hotflo storage tank need to be positioned to suit the installation using the dip
tube tool (purchased separately, part number 11143). Insert the tool into the dip or riser tube to be reversed and
rotate 180°.
cold
supply
opon 1
from heat
pump
hot
supply
opon 2
from heat
to
heat pump
dip tube tool
pump
As supplied Heat pump configuration 1 & 2
Connecting to other storage tanks
Connections to storage tanks which are not heat pump or solar ready can be made in a number of ways—some
examples are shown below.
cold
supply
hot
supply
TPR hot
supply
TPR
cold
supply
from
heat
pump
to
heat pump
cold
supply
hot
supply
TPR
from
heat
pump
to
Insert dip
tube
Heatshrink if
required to
prevent
corrosion.
Ensure probe is
sensing tank temp.
heat pump
As supplied RMC 4-way fitting Combine TPR & hot outlet

Hoto hot water heat pump operation & installation 11790-C 03-12 | 15
Attaching the temperature sensor
The temperature sensor lead (supplied) must be run from the heat pump to the
storage tank.
IMPORTANT
Ensuring and maintaining a good
temperature probe contact with
the storage tank will ensure
accurate temperature readings.
Failure to install the temperature
probe/sensor as instructed could
cause the heat pump to run for
longer periods, and result in high
electricity bills for the customer.
1. Remove the element box
cover from the storage tank.
2. Apply a small quantity of
a suitable heat transfer
compound, such as Unick
(available from Dick Smith
electronics) along the back of
the temperature probe and
contact fixing.
3. Place the temperature probe
as high up inside the element
box as possible, and run the
sensor cable down the side of
the element box.
4. Cover all components in
the element box with the
insulation provided, and refit
the element box cover.
5. Remove the electrical cover
plate from the right hand side
of the heat pump. Plug the
other end of the temperature
sensor into the matching
connector. Refit the cover
plate.
6. Run the temperature sensor
over the required length and
fix in place with suitable clips.
Gather any excess cable and
secure with cable ties in a
convenient position.

16 | Hoto hot water heat pump operation & installation 11790-C 03-12
Piping
Pipes must be insulated with ultraviolet and weather resistant closed cell insulation having
a minimum thickness of 13 mm and thermal conductivity of greater than 0.045 W/m.K.
Examples; Armacell HT and Armaflex.
1. Attach the supplied water filter to the heat pump water inlet.
2. Fit suitable isolating valves to the heat pump connections at the tank.
Costs associated with draining storage tanks to service the heat pump, where valves are not fitted,
are not covered by warranty.
3. Select pipe size with reference to the table below. Maximum pipe length is the total pipe installed (e.g. 14 m
would be 7 m flow plus 7 m return).
Pipe inner diameter Maximum pipe length
12 mm 14 m
15 mm 22 m
19 mm 30 m
IMPORTANT

Hoto hot water heat pump operation & installation 11790-C 03-12 | 17
Filling and commissioning
1. Fill the storage tank and heat
pump until water flows freely
from the outlets in the house.
2. Bleed the air from the heat
pump and prime before
starting the heat pump.
Failure to bleed all air
from the heat pump
can lead to failure of
the circulation pump.
This is not covered by
warranty.
3. Open shut-off valves SV1 and
SV2. Open bleed valves BV1
and BV2. Once the water is
running from the drain hoses
attached to BV1 and BV2
(without air bubbles), BV1 can
be closed followed by SV1.
4. Once water (without air) is
running from the BV2 drain,
close BV2.
5. Close SV2 and open SV1.
Open BV1. Once water is
running from the BV1 drain
(without air), close BV1. Open
SV2.
6. Remove the top cover from
the heat pump.
Identify the mains
voltage connections and
take care to avoid them.
7. Plug in the heat pump power
supply. The LED display on the
PCB will display the current
temperature reading of the
temperature sensor. After
three minutes delay, operation
will commence.
8. Open the central bleed screw
on the pump housing briefly
to remove any remaining air
from the heat pump.
9. Allow the heat pump to run
for at least 15 minutes to
verify it is operating correctly.
If operation ceases and P1
is displayed on the LED, this
indicates water circulation is
not sufficient and the priming
process must be repeated.
10. If the heat pump and tank
are more than 5 m apart and
the R5043 adjustable flow
restrictor is fitted, adjust
the pump speed and flow
restrictor to achieve a 3 litre
per minute circulating flow.
11. Replace the top cover of the
heat pump.
IMPORTANT
WARNING
SV1
SV2
Storage
Cylinder
BV1
BV2 Flow
Restrictor
Strainer
Hotflo hot
water heat
pump
Flow restrictor
- ≤ 5 m use 3.5 mm brass orifice supplied
- > 5 m use R5043 adjusted to 3 L/min

18 | Hoto hot water heat pump operation & installation 11790-C 03-12
Protection against freezing
Supplied with this guide are two labels warning against disconnecting the power supply
where freezing conditions are likely. These should be fixed adjacent to the heat pump outdoor
power point and on the main fuse/switchboard of the house.
Handover to the customer
After testing is completed, explain to the householder the functions and operation of the heat
pump water heater system.
Explain to the householder the need to drain the heat pump if power is likely to be shut off and if freezing
conditions could occur. Also explain to the householder the importance of carrying out maintenance in
accordance with this manual.
Leave this guide with the householder.

Hoto hot water heat pump operation & installation 11790-C 03-12 | 19
Draining instructions
Draining the heat pump unit
1. Turn off the power to the heat
pump.
2. Close the cold water mains
supply stop cock.
3. Close the isolation valves
between the cylinder and heat
pump.
4. Disconnect the piping from
the heat pump as shown and
allow the water to drain from
the pipes.
5. Reconnect the pipe work,
but do not open the isolation
valves until the heat pump is
ready to be refilled.
Draining the heat pump unit
and tank
1. Turn off the power to the heat
pump.
2. Close the cold water mains
supply stop cock.
3. Ensure any isolating valves
between the heat pump and
the cylinder are open.
4. Open a hot tap to relieve
pressure.
5. Disconnect the hot outlet near
the top of the tank.
6. Disconnect the cold inlet near
the bottom of the tank.
The system will now drain
completely.
To avoid water damage to
the heat pump and/or tank,
ensure water is able to
drain freely away from both
appliances.
Cold water inlet
Air bleed valve
Heat pump
Hot water outlet
Air bleed valve
Draining the heat pump - step 4
IMPORTANT

20 | Hoto hot water heat pump operation & installation 11790-C 03-12
Limited warranty
Rinnai warranty summary
HOTFLO HOT WATER HEAT PUMP
Compressor All other
components
Parts 3 years 3 years
Labour 3 years 3 years
All terms of the warranty are
effective from the date of
installation of the Rinnai Hotflo
Heat Pump. Proof of installation
will be required.
General warranty terms
Rinnai reserves the right to
make modifications and change
specifications and its parts without
notice.
For the purposes of the Consumer
Guarantees Act 1993, Rinnai only
guarantees the availability of repair
facilities and spare parts for the
express warranty periods recorded
in the Rinnai warranty summary
table.
If the Rinnai Hotflo Heat Pump
is being acquired for personal,
domestic or household use,
this warranty does not limit any
consumer rights or guarantees
that may apply under the
Consumer Guarantees Act 1993.
If the product is being acquired
for the purposes of a business,
the provisions of the Consumer
Guarantees Act 1993 do not apply
and no other warranties (either
express or implied by law) apart
from those stated in this warranty
apply.
Warranty terms and conditions
All terms of this warranty are
effective from the date of
installation. The attending service
person reserves the right to verify
this date.
All Rinnai appliances must
be installed, commissioned,
serviced, repaired and removed
in accordance with the
manufacturer’s instructions,
local regulations, and municipal
building codes by persons
authorised by local regulations to
do so.
All appliances must be operated
and maintained in accordance
with the manufacturer’s operating
instructions.
The warranty applies only to the
components supplied by Rinnai.
It does not apply to components
supplied by others, such as,
isolating valves, electrical switches,
pipe work, electrical cables, fuses,
and where applicable components
supplied by others, but not limited
to these.
Where the appliance has not
been sited in accordance with
the installation instructions or
installed such that normal service
access is difficult, a service charge
will apply. If at the discretion of
the attending service person the
installation is deemed illegal or
access is dangerous, service will
be refused. Any work required to
gain access to the appliance will
be chargeable by the attending
service person (for example,
removal of walls, or the use
of special equipment to move
components, but not limited to
these).
Where a failed component is
replaced under warranty, the
balance of the original appliance
warranty will remain effective.
The replacement part or appliance
does not carry a new warranty.
Rinnai reserve the right to transfer
functional components from
defective appliances if they are
suitable.
Rinnai reserve the right to have the
installed product returned to the
factory for inspection.
Where the heat pump is installed
outside the metropolitan area
or further than 40 km from a
Rinnai authorised service centre,
travel costs shall be the owner’s
responsibility.
Warranty exclusions
The following exclusions may
cause the warranty to become
void and will result in a service
charge and costs of parts (if
required).
- Accidental damage and acts
of God.
- Failure due to abuse or
misuse, improper maintenance
or improper storage.
- Failure due to incorrect or
unauthorised installations.
- Failure or damage caused by
alterations, service or repair
work carried out by persons
other than a Rinnai service
person or service centre.
- Where the heat pump has
failed directly or indirectly as
a result of poor water quality
outside the limits specified.
- Where it is found that there
is no fault with the appliance
and the issue is related to the
installation or is due to power
failure.
- Subject to any statutory
provisions to the contrary,
Rinnai does not accept:
a. liability for consequential
damage or any incidental
expenses resulting
from any breach of the
warranty
b. claims for damage to
buildings or any other
consequential loss either
directly or indirectly due
to leaks from the heat
pump or any other faults