Rinnai CHP020 User manual

Commercial Air to Water Heat Pump
Operation & Installation Manual
MODELS
CHP020
CHP040

Rinnai 2 Commercial Heat Pump OIM
Congratulations on the purchase of your Rinnai appliance. We trust you will have many years of comfort and
enjoyment from your appliance.
IMPORTANT
BEFORE USING THIS APPLIANCE
Before proceeding with the operation or installation read this manual thoroughly and gain a full
understanding of the appliance, to ensure safe and correct use.
IMPORTANT NOTICE FOR INSTALLERS
Please leave these instructions with the end user after commissioning of the system and alert the
end user of the content sections "Warnings and "Periodic Inspection" and "Maintenance".
This appliance must be installed in accordance with:
• Manufacturer’s Installation Instructions
• Current AS/NZS 3500
• Plumbing Code of Australia (PCA)
• Local Regulations and Municipal Building Codes
including local OH&S requirements
This system must be installed, commissioned, serviced,
maintained and removed ONLY by anAuthorised Person.
NOT SUITABLE AS A POOL OR SPA HEATER
For continued safety of this appliance it must be installed and
maintained in accordance with the manufacturer’s instructions.
AS3498 Lic W00169
SAI Global

Rinnai 3 Commercial Heat Pump OIM
TABLE OF CONTENTS
Warnings and Important Information 5
Safety and Regulatory Information .................................................................................................................5
Transport and Storage of Appliance ...............................................................................................................6
Lifting ................................................................................................................................................................6
Scald Hazards ...................................................................................................................................................7
Operation Principle ..........................................................................................................................................8
Safety Devices ..................................................................................................................................................9
Pressure & Temperature Relief (PTR) Valve ���������������������������������������������������������������������������������������������9
Excessive Discharge from Safety Devices ....................................................................................................9
Pressure & Temperature Relief (PTR) Valve ���������������������������������������������������������������������������������������������9
Expansion Control Valve (ECV) - if required ���������������������������������������������������������������������������������������������9
Hydrogen Gas .................................................................................................................................................10
Turning O󰀨 the Water Heating System .........................................................................................................10
Turning On the Water Heating System .........................................................................................................10
Draining ...........................................................................................................................................................10
Maintenance and Regular Care .....................................................................................................................10
Save a Service Call 11
Specications 13
System Specications ...................................................................................................................................13
Dimensions .....................................................................................................................................................14
Clearances ......................................................................................................................................................15
Unit Main Components Overview .................................................................................................................16
Main Electric Components In Switchboard .................................................................................................17
Installation 18
Regulations and Occupation Health and Safety (OH&S) ............................................................................18
Location .........................................................................................................................................................18
Internal Installation ����������������������������������������������������������������������������������������������������������������������������������18
Condensation ������������������������������������������������������������������������������������������������������������������������������������������18
Drainage ��������������������������������������������������������������������������������������������������������������������������������������������������18
Water Supply ...................................................................................................................................................19
Storage Temperature .....................................................................................................................................19
Hot Water Delivery Temperature ...................................................................................................................19
Valves and Fittings .........................................................................................................................................19
Positioning The Heat Pump ...........................................................................................................................20
Installation Dimensions ................................................................................................................................20
Connect the PTR Valve ..................................................................................................................................21
Plumbing Connections .................................................................................................................................21
Equal Flow Principle ......................................................................................................................................22
Typical Installations .......................................................................................................................................23
Connect Cold / Hot Water Supply .................................................................................................................24
Electrical Tests ...............................................................................................................................................24
Conducting Insulation (Megger) Tests �����������������������������������������������������������������������������������������������������24

Rinnai 4 Commercial Heat Pump OIM
Electrical Connections ...................................................................................................................................24
Main Power ���������������������������������������������������������������������������������������������������������������������������������������������24
Primary Pump ����������������������������������������������������������������������������������������������������������������������������������������25
Tank Sensor Installation �������������������������������������������������������������������������������������������������������������������������25
Auxiliary Booster (optional) ���������������������������������������������������������������������������������������������������������������������25
Filling the System and Commissioning .......................................................................................................25
Finishing the Installation ...............................................................................................................................26
User Terminal .................................................................................................................................................27
Keypad ����������������������������������������������������������������������������������������������������������������������������������������������������27
Icons ��������������������������������������������������������������������������������������������������������������������������������������������������������27
Operation ������������������������������������������������������������������������������������������������������������������������������������������������28
Applica App .....................................................................................................................................................28
Alarm Codes & Troubleshooting ..................................................................................................................31
Commissioning Log & Checklist ..................................................................................................................32
BMS Setting ....................................................................................................................................................33
Menu steps ......................................................................................................................................................34
Registry Information ......................................................................................................................................35
Contact 36
TABLE OF CONTENTS

Rinnai 5 Commercial Heat Pump OIM
SAFETY AND REGULATORY INFORMATION
WARNING
DO NOT operate this system before reading the manufacturers instructions.
This appliance must be installed, commissioned and serviced by an authorised person in
accordance with all applicable local rules and regulations.
Access covers of water heating system components will expose 415V wiring and MUST only be
removed by an authorised person.
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.
For continued safety of this appliance it must be installed, operated and maintained in accordance
with the manufacturer’s instructions.
Children should be supervised to ensure they DO NOT play with the appliance.
The power mains must have a circuit breaker and it must be adequate for unit FLA. If the power
supply cord is damaged, it MUST BE replaced by an authorised person in order to avoid a
hazard. Take care not to touch the power connections or plugs with wet hands.
Care should be taken not to touch the pipe work as it may be HOT!
DO NOT place articles on or against this appliance.
DO NOT store chemicals or ammable materials near this appliance.
DO NOT operate with collectors or covers removed from this appliance.
DO NOT activate heat pump unless cylinder is full of water.
NEVER use a ammable spray such as hair spray, paint, etc near this unit as this may cause a
re.
At the end of the service life of the heat pump water heater and prior to being disposed of, a
person qualied with refrigerant handling must recover the refrigerant from the system. The
refrigerant must not be vented to atmosphere. Please call our National Help Line to arrange for
an inspection.
WARNING
MANDATORY INSPECTION PRIOR TO INSTALLATION
Immediately report any damage or discrepancies to the Supplier of the appliance. This
appliance was inspected and tested at the time of manufacture and packaging, and released for
transportation without known damage. Upon receipt, inspect the exterior for evidence of rough
handling in shipment. Ensure that the appliance is labelled correctly for the gas and electrical
supply, and/or other services it is intended to be connected to.
For safety and warranty purposes, appliances that may be damaged or incorrect MUST NOT be
installed or operated under any circumstances. Installation of damaged or incorrect appliances
may contravene local government regulations. Rinnai disclaims any liability or responsibility
whatsoever in relation to the installation or operation of damaged or incorrect appliances.
NOTICE TO VICTORIAN CONSUMERS
This appliance must be installed by a person licensed with the Victorian BuildingAuthority.
Only a licensed person will have insurance protecting their workmanship.
So make sure you use a licensed person to install this appliance and ask for your Compliance Certicate.
For further information contact the Victorian BuildingAuthority on 1300 815 127
WARNINGS AND IMPORTANT INFORMATION

Rinnai 6 Commercial Heat Pump OIM
TRANSPORT AND STORAGE OF APPLIANCE
IMPORTANT
IMPORTANT
DO NOT TILT
MORE THAN 45
FROM VERTICAL°
45°


The Rinnai Electric Heat Pump must be transported at an angle no greater that 45º from vertical. Should the heat
pump be tilted at a greater angle than 45º from vertical, the lubrication oil within the compressor can run down into
the accumulator. This will leave the compressor motor without sufcient lubrication and lead to premature failure
of the compressor unit.
As a general good practice it is better to keep the compressor upright as much as possible to avoid any risks.
Returning the Rinnai Electric Heat Pump to a vertical position will not allow the oil to properly ow back into the
compressor motor.
Tilting Rinnai Electric Hot Water beyond 45º from vertical will also place undue strain on compressor motor mounts
and associated piping.
LIFTING
Unit weights and dimensions are detailed in the section “System Specications” on page 13.
Please use an appropriate tonnage forklift or crane to lift the unit to its installation position. During lifting, the
unit shall be kept upright and not dropped to avoid unit damage or human injuries. Slings may be inserted to the
lifting points however, spreader bars MUST be used over unit to prevent sling or chain damage. Lifting holes are
provided on foot corners of the unit as illustrated below .
WARNINGS AND IMPORTANT INFORMATION

Rinnai 7 Commercial Heat Pump OIM
SCALD HAZARDS
HOT WATER CAN CAUSE SCALDS.
CHILDREN, DISABLED, ELDERLY AND THE INFIRM ARE AT THE HIGHEST RISK OF
BEING SCALDED.
FEEL WATER TEMPERATURE BEFORE BATHING OR SHOWERING.
SCALDS FROM HOT WATER TAPS CAN RESULT IN SEVERE INJURIES TO YOUNG
CHILDREN.
SCALDS OCCUR WHEN CHILDREN ARE EXPOSED DIRECTLY TO HOT WATER WHEN
THEY ARE PLACED INTO A BATH WHICH IS TOO HOT.
ALWAYS......
Test the temperature of the water with your elbow before placing your child in the bath, also carefully
feel water before bathing or showering yourself.
Supervise children whenever they are in the bathroom.
Make sure that the hot water tap is turned o󰀨 tightly.
CONSIDER.....
Installing child proof tap covers or child resistant taps (both approaches will prevent a small hand being
able to turn on the tap).
Installing tempering valves or thermostatic mixing valves which reduce the hot water temperature
delivered to the taps. Your local plumbing authority may already require that these be tted. Contact
your installer or local plumbing authority if in doubt.
NEVER….
Leave a toddler in the care of another child. They may not understand the need to have the water
temperature set at a safe level.
WARNINGS AND IMPORTANT INFORMATION

Rinnai 8 Commercial Heat Pump OIM
OPERATION PRINCIPLE
The operation of an electric heat pump is similar to a refrigerator, but in reverse. A heat pump operates by
transferring heat from the ambient outside air into the water. Electricity is just used to operate the system, but not
to directly heat the water. Because of this energy consumption is signicantly reduced as compared to an electric
element hot water system.
The warmer the climate in which the heat pump is installed, the more efcient the heat pump system will be at
heating water.
The heat pump unit utilizes a circulation pump to draw water from the bottom of 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 to
achieve suitable tank temperatures.
During the occasional times when the ambient weather conditions aren’t suitable for the heat pump to operate, the
heat pump will activate auxiliary booster (if installed) to ensure a supply of hot water.
To meet the requirements of the National Plumbing Standard the temperature of the stored water has been set
to 65°C.
This water heater can deliver water at temperatures which can cause scalding. Check the water temperature
before use, such as when entering a shower or lling a bath or basin, to ensure it is suitable for the application and
will not cause scald injury.
We recommend and it may also be required by regulations that an approved temperature limiting device be tted
into the hot water pipework to the bathroom and ensuite when this water heater is installed. This will reduce the
risk of scald injury and still allow hotter water to the kitchen and laundry.
WARNINGS AND IMPORTANT INFORMATION

Rinnai 9 Commercial Heat Pump OIM
SAFETY DEVICES
The water heating system is supplied with various safety devices including temperature sensors, overheat sensors
and switches and a Pressure & Temperature Relief (PTR) valve. These devices must not be tampered with or
removed. The water heating system must not be operated unless each of these devices is tted and is in working
order.
WARNING
DO NOT tamper with or remove safety devices.
DO NOT operate the water heater unless all safety devices are tted and in working order.
DO NOT block or seal the PTR Valve and drain pipe.
Pressure & Temperature Relief (PTR) Valve
This valve is located near the top of the water heater and is
essential for safe operation. It is normal for the valve to release
a small quantity of water through the drain line during heating.
However, continuous leakage of water from the valve and its
drain line may indicate a problem with the water heater.
WARNING
NEVER block the outlet of the PTR valve or it’s drain line for any reason. The easing gear MUST
be operated at least every 6 months to remove lime deposits and verify that it is not blocked.
Failure to do this may result in the water heater failing.
If the valve does not discharge water when the easing gear lever is opened, or does not seal again
when the easing gear is closed, attendance by an authorised person MUST be arranged without
delay. The PTR valve is not serviceable.
EXCESSIVE DISCHARGE FROM SAFETY DEVICES
Pressure & Temperature Relief (PTR) Valve
It is normal and desirable that this valve allows a small quantity of water to be discharged during the heating cycle.
If it discharges more than a bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve dribbles continuously, try easing the valve gear for a few seconds as described above. This may
dislodge any foreign matter and alleviate the problem.
If the valve discharges at high ows, especially at night, it may be as a result of the water pressure exceeding the
design pressure of the water heater. Ask your installer to t a Pressure Limiting Valve (PLV).
WARNING
NEVER replace the PTR valve with one which has a higher pressure rating than is specied for your
water heater.
Expansion Control Valve (ECV) - if required
It is normal that this valve allows a small quantity of water to be discharged during the heating cycle. If it discharges
more than a bucket of water during a 24 hour period or discharges continuously there may be another problem.
If the valve leaks continuously, try easing the valve gear for a few seconds. This may dislodge any foreign matter
and alleviate the problem. If this does not alleviate the problem contact Rinnai.
Operate the easing gear regularly to remove any lime deposits and to verify that it is not blocked.
Lift lever until water
flows fromdrain line
(Lower lever genlty!)
WARNINGS AND IMPORTANT INFORMATION

Rinnai 10 Commercial Heat Pump OIM
HYDROGEN GAS
If the hot water unit is not used for two weeks or more, a quantity of hydrogen gas, which is highly ammable,
may accumulate in the water heater. To dissipate this safely, it is recommended that a non electrically operated
hot tap be turned on for two minutes at a sink, basin, or bath, but not a dishwasher or other appliance. During
this procedure there must be no smoking, open ame or any electrical appliance operating nearby. If hydrogen is
discharged through the tap, it will probably make a sound like air escaping.
TURNING OFF THE WATER HEATING SYSTEM
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 off the water heater, do so as outlined below:
WARNING
DO NOT turn 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. Follow the
procedure described below in the section the section ‘Draining’ on page 10.
TURNING ON THE WATER HEATING SYSTEM
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.
DRAINING
Draining or lling 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. Arrange for an authorised person to carry out this task.
To drain the heat pump:
1. Turn off power to the heat pump.
2. Close the cold water mains supply stop cock.
3. Close all hot water taps.
4. Operate the relief valve release lever on one of the storage tanks to release the pressure in the water heater.
5. Close the isolation valves at the inlet and outlet of the water heater and place a bucket under the cold water
inlet.
6. Undo the unions at the inlet and outlet of the water heater. The heat pump holds 8 to 15 litres of water and
will drain into the bucket.
MAINTENANCE AND REGULAR CARE
Operate the easing gear of the PTR and the ECV if tted as described in the section ‘Safety Devices’ on page 9.
The overow tray (supplied by installer) and drain underneath the storage cylinder (if tted) should be periodically
checked to ensure there are no blockages.
WARNINGS AND IMPORTANT INFORMATION

Rinnai 11 Commercial Heat Pump OIM
Rinnai’s servicing network personnel are fully trained and equipped to give the best service on your Rinnai
appliance. If your appliance needs service, ring one of the service contact numbers on the back of this booklet.
The pressure and temperature relief valve and expansion control valve (if tted) must be replaced by an authorised
person at intervals not exceeding 5 years or more frequently in areas where the water is classied as scaling water.
If the power supply cord to the heat pump unit is damaged, they must be replaced by an authorised person in order
to avoid a hazard.
Use the following guide to avoid the need for an unnecessary service call.
INSUFFICIENT OR NO HOT WATER
Heat Pump Unit Not Powered Check to ensure the electric isolating switch at the switchboard (usually
marked “Hot water” or “Water heater” is turned on. (note that the
compressor will not start up for 1 minute after power is turned on).
Excessive hot water
consumption Often end users are surprised at the amount of hot water used, especially when showering. If the amount of hot water used during the day exceeds
the storage capacity of the cylinder, it is likely there will be insufcient hot
water.
Pressure & Temperature
Relief (PTR) Valve continually
discharging water
It is normal and desirable that this valve allows a small quantity of water
to be discharged during the heating cycle. If it discharges more than a
bucket of water during a 24 hour period or discharges continuously there
may be another problem.
If the valve dribbles continuously, try easing the valve gear for a few
seconds as described in the section the section ‘Excessive Discharge
from Safety Devices’ on page 9. This may dislodge any foreign matter
and alleviate the problem.
If the valve discharges at high ows, especially at night, it may be as a
result of the water pressure exceeding the design pressure of the water
heater. Ask your installer to t a Pressure Limiting Valve (PLV).
Expansion Control Valve (ECV)
continually discharging water It is normal and desirable that this valve allows a small quantity of water to be discharged during the heating cycle. If it discharges more than a
bucket of water during a 24 hour period or discharges continuously there
may be another problem.
If the valve leaks continuously, try easing the valve gear for a few seconds
as described in the section the section ‘Excessive Discharge from Safety
Devices’ on page 9. This may dislodge any foreign matter and alleviate
the problem. If this does not alleviate the problem contact Rinnai.
Ambient conditions too hot To protect the components of the heat pump unit it may not operate when
the ambient temperature is higher than 50°C. The auxiliary booster if
installed, will operate if water heating is required, but may take longer to
heat the water.
Ambient conditions too cold To protect the components of the heat pump unit, it may not operate
when the ambient temperature is less than 0°C. The auxiliary booster if
installed, will operate if water heating is required, but may take longer to
heat the water.
NO WATER FROM THE TAP
Restriction in the hot tap or
failure of the cold water supply
to the water heater
Check for water ow at the other taps and that the cold water isolation
valve is fully open.
SAVE A SERVICE CALL

Rinnai 12 Commercial Heat Pump OIM
HIGH ELECTRICITY BILLS
Excessive hot water
consumption See entry under the heading ‘Insufcient or no hot water’
High Electricity Tari󰀨s The electricity tariff will determine the running costs of the system. It is
important the end user is aware of the applicable tariffs. Contact your
electricity supplier to conrm what these tariffs are.
Higher Element Usage In extremely cold conditions the element may be operating more than
normal.
WATER FLOW FLUCTUATIONS
High demand of hot water at
the same time High demand of hot water in use at the same time may cause a decrease in the hot water ow from the taps.
Check total heating capacity of water heaters meets the highest demand
of hot water in the building.
WATER HAMMER
Hot and cold water plumbing in
the premises Have a plumber check clipping of hot and cold water pipe work and install a pressure limiting valve and water hammer arrestor as required.
HEAT PUMP ICES UP
Defrosting function The heat pump has a built in reversing defrosting function which may
operate and remove any ice.
HEAT PUMP ERROR INDICATOR
Red alarm code is showing on
the Display This will appear if an error is detected with the heat pump operation, please call Rinnai for assistance if this should occur.
SAVE A SERVICE CALL

Rinnai 13 Commercial Heat Pump OIM
SYSTEM SPECIFICATIONS
Model - CHP020 CHP040
Voltage/Phase - 400-415V/3Ph+N/50Hz
Heating Capacity [1] kW 20.0 39.5
Power Input [2] kW 4.7 9.6
COP - 4.25 4.10
Maximum Input Power kW 9.0 18.5
Maximum Input Current A 17.5 40.0
Recommended Circuit Breaker
Rating A 25 50
Recommended Conductor Cross-
sectional Area mm22.5 6.0
WaterMark Certied -Yes
Operating Range (ambient) °C 0 ~50
Refrigerant System Type R513A
No. of Circuits 1
Compressor Type Scroll
Qty 1
Fan Type Hybrid Axial
Speed Control Variable Speed
Qty 2
Air Heat Exchanger Type Fin-tube protective coating
Qty 1 1
Nominal Airow L/s 2500 4470
Water/Refrigerant Heat Exchanger Type Double Wall Stainless steel
Qty 1 2
Throttle - Electronic Expansion Valve
Defrost - Reverse Operating
Rated Sound Power dB(A) 66.6 68.7
IP Grade - IPX4
Water Pump Model CM 3-2 CM 10-1
Power Supply 1PH240V~50Hz
Outer Water Head (m) 10 8
Water Connections - R 1¼ MBSP R 2 MBSP
Rated Water Pressure kPa 1000
Supply Water Pressure Maximum kPa 800
ECV Fitted Fit PLV if mains pressure exceeds 680 kPa
Recommended PLV pressure rating 500 kPa
ECV Not Fitted Fit PLV if mains pressure exceeds 800 kPa
Recommended PLV pressure rating 500 kPa
Maximum Temperature Setting °C 65
Dimensions Height (mm) 1162 1442
Width (mm) 730 850
Length (mm) 1550 2050
Nominal Weight [3] Kg 236 360
[1] Test condition: 20°C ambient / 60% RH. 39°C water in / 45°C water out.
[2] Water pump power is not included
[3] For base model only. Factory options will vary.
SPECIFICATIONS
SPECIFICATIONS

Rinnai 14 Commercial Heat Pump OIM
DIMENSIONS
Description Dimensions (mm)
Model Version A B C D E F G
CHP020 Top Discharge 1162 730 1550 1288 809 1590 -
Side Discharge 1162 730 1550 - 809 1590 895
CHP040 Top Discharge 1442 850 2050 1565 928 2100 -
Side Discharge 1442 850 2050 - 928 2100 1011
B
E
C
D A
Top Discharge Unit
F
Side Discharge Unit
B
E
G
A
WATER OUTLET
CHP020: R 1 1/4 MBSP
CHP040: R 2 MBSP
F
C
WATER INLET
CHP020: R 1 1/4 MBSP
CHP040: R 2 MBSP
WATER OUTLET
CHP020: R 1 1/4 MBSP
CHP040: R 2 MBSP
WATER INLET
CHP020: R 1 1/4 MBSP
CHP040: R 2 MBSP
SPECIFICATIONS

Rinnai 15 Commercial Heat Pump OIM
CLEARANCES
Description Dimension(mm)
Model Version A B C D E
F
CHP020 Top Discharge 850 500 1000 500 1500 -
Side Discharge 850 500 1000 500 - 1500
CHP040 Top Discharge 850 650 1000 600 1800 -
Side Discharge 850 650 1000 600 - 1800
Top Discharge Unit
Side Discharge Unit
A
B
CD
E
A
B
CD
F
Coil Side
SPECIFICATIONS

Rinnai 16 Commercial Heat Pump OIM
UNIT MAIN COMPONENTS OVERVIEW
Item Description
AAccumulator
BCompressor - Scroll
CReversing Valve
DLow Pressure Transducer (0-10Bar)
ELow Pressure Switch
FHigh Pressure Transducer (0-30Bar)
GHigh Pressure Switch
HElectronic Expansion Valve
ISwitchboard
JFan
KLiquid Receiver
LPlate Heat Exchanger
MEvaporator Coil
NWater Pump
OBall Valve - Water Inlet
PBall Valve - Water Outlet
QNon-return Valve
RWater Inlet Bush
SWater Outlet Bush
SPECIFICATIONS

Rinnai 17 Commercial Heat Pump OIM
MAIN ELECTRIC COMPONENTS IN SWITCHBOARD
Item Description
Main Breaker - Field Wiring
Breaker - Water Pump
Breaker - Fan
Breaker - Controller
3 - Phase Fail Relay
Contactor - Compressor
Electronic Overload
Transformer
Terminals - Pump, Fan
Relay - Water Pump
Terminals - Tank Sensor
Main Controller
Fan Speed Controller
User Interface
8
12
123456
7
10 9
11
13
14
SPECIFICATIONS

Rinnai 18 Commercial Heat Pump OIM
REGULATIONS AND OCCUPATION HEALTH AND SAFETY (OH&S)
WARNING
Installation and commissioning MUST be performed by authorised persons.
The heat pump MUST be installed in accordance with these instructions and all regulatory
requirements which exist in your area including those in relation to manual lifting.
Applicable publications and regulations may include:
• AS/NZS 3500 National Plumbing and Drainage
• AS/NZS 3000 Wiring Rules
• Plumbing Code of Australia (PCA)
• Building Codes of Australia (BCA)
• Local Occupational Health and Safety (OH&S) regulations
This appliance is not suitable for use as a domestic spa pool or swimming pool heater.
Electric Heat pumps are heavy and bulky items. Australian States and Territories have a Principal
Occupational Health and Safety (OH&S) Act which contains requirements relating to the handling
of large, bulky or awkward items. Persons installing heat pump systems MUST be aware of their
responsibilities and be adequately trained and qualied, in accordance with local OH&S requirements.
LOCATION
The electric heat pump can be installed externally or internally.
The electric heat pump should be placed as close as practicable to the most frequently used hot water outlet point
or points to minimise the delay time for hot water delivery. For installations where the distance between the heat
pump and the outlets is considerable, a ow and return system can be used which minimise the waiting time for
hot water delivery.
It is recommended that all components are installed at ground or oor level. The heat pump MUST be installed in
a vertically upright position. All components MUST be accessible without the use of a ladder or scaffold.
The air inlet and outlet of the heat pump module MUST be away from areas with strong wind and MUST be
provided with sufcient clearances as per those shown in the section “Clearances” on page 15
The heat pump MUST be connected to an independent AC 415V, 50Hz power supply.
Ensure the pressure and temperature pressure relief (PTR) valve and any access covers have sufcient clearances
and are accessible for service and removal. The information on the rating plates MUST also be readable.
The heat pump MUST be installed free-standing on a level and stable base. The storage tank should be mounted
on a concrete base at least 50mm thick or on well-seasoned, evenly spread hardwood slats with a thickness of at
least 25mm. Where property damage can occur as a result of water leakage, the storage tank MUST be installed
with a safe tray (overow tray) and drain in accordance with AS 3500.4. Ensure the storage tank DOES NOT
stand on wet surfaces.
Internal Installation
For internal installations the area MUST meet the following requirements:
• Good ventilation to ensure heat pump work properly and efciently.
If the heat pump is installed internally careful consideration should be taken in regards to positioning and limiting
the effect of unit noise and reverberation during operation.
Condensation
As this heat pump is highly efcient the surrounding air temperature could be cooled by up to 0°C and condensate
formed, the condensate will need to plumbed to a suitable drain.
Drainage
Where property damage can occur as a result of water leakage, the water heater MUST be installed with a safe
tray (overow tray) and drain. Construction, installation and draining of the safe tray MUST comply with local
regulatory requirements and. AS/NZS 3500.4 also requires the use of a safe tray for particular situations.
INSTALLATION

Rinnai 19 Commercial Heat Pump OIM
WATER SUPPLY
The maximum water pressure is listed on page 13. An approved pressure limiting valve may be required if the
maximum rated water supply pressure is exceeded.
Water chemistry and impurity limits are detailed in the separate warranty document. Most metropolitan water
supplies fall within these requirements. If you are unsure about water quality, contact your water authority.
A water lter MUST be tted on the inlet to the tank to prevent sludge or foreign matter entering the system.
In a scaling water supply, calcium carbonate and possibly other compounds are deposited out of the water onto
any hot metallic surface and form a scale. Scaling water may cause scale deposits to form onto the metallic
surfaces of the PTR valve and may prevent it from operating properly. To prevent this, an expansion control valve
(ECV) MUST be tted on the cold water line after the non-return valve in areas of scaling water. ECVs’ MUST
be tted in South Australia and Western Australia to comply with local regulations.
STORAGE TEMPERATURE
To meet regulatory requirements the thermostat control on the heat pump water heater is factory pre-set to heat
all the water in the tank to 65°C.
HOT WATER DELIVERY TEMPERATURE
This appliance may deliver water at high temperature. Refer to the Plumbing Code of Australia (PCA), local
requirements and installation instructions to determine if additional delivery temperature control is required.
The PCA, local regulations and the requirements of AS/NZS 3500.4 MUST be considered regarding the
temperature limitations of hot water supplied to areas used primarily for personal hygiene.
The temperature of water to certain areas is limited to different temperatures according to purpose, for e.g. early
childhood centres, primary and secondary schools and nursing homes or similar facilities for young, aged, sick
or people with disabilities and for all other buildings. To comply with these requirements, a temperature limiting
device, such as a thermostatic mixing or tempering valve, will be required on hot water systems.
VALVES AND FITTINGS
The following valves and ttings should be supplied with your heat pump system:
• A combined pressure and temperature (PTR) relief valve. This valve is tted at the top of the storage tank.
The PTR valve is a safety device and it is mandatory that it is tted by the installer in all installations.
The following valves & ttings are to be supplied by the installer:
• A cold water expansion control valve (ECV). An ECV MUST be tted in Western Australia and South Australia
to the cold water supply to the storage cylinder to comply with local regulations. An ECV is recommended in
all other geographical areas where the water supply has a tendency to cause scaling. This will reduce hot
water discharge from the pressure and temperature relief (PTR) valve which minimises wear on this valve.
• A stop cock, non return valve and line strainer. Combination valves incorporating two or more of these
functions (such as ‘Trio’ valves) are suitable. These are tted to the cold water supply to the storage tank
by the installer.
• Cold water supply and hot water discharge pipework to and from the storage tank. This pipework MUST be
insulated as specied in AS/NZS3500.4.
• An approved pressure limiting valve is required if the maximum rated water supply pressure on page 13
is exceeded.
• Tempering valve(s) or thermostatic mixing valve.
INSTALLATION

Rinnai 20 Commercial Heat Pump OIM
POSITIONING THE HEAT PUMP
• Arrive at site and conduct a safety audit (Safety audits can also be known as Work Method Statements
(WMS) or Job Site.
• Analysis (JSA).
• Park your vehicle as close as allowable to your installation. Unload all materials in a safe manner.
• Position all materials in a convenient position near the work area.
• The heat pump is designed to be installed outdoors or indoor if a sufcient supply of heat energy and good
ventilation is available. Good performance is obtained when the heat pump is supplied with a constant
supply of fresh air. Failure to meet above recommendations may lead to lower performance or problematic
operation of the heat pump.
• The location MUST consider noise impact on living areas. Avoid positioning near bedrooms or neighbours’
bedrooms.
• Adequate access MUST be available for servicing of the heat pump. Refer to clearance requirements
specied in the section ‘clearances’. The water heater must be accessible without the use of a ladder or
scaffold.
• The water heater MUST not be installed in an area with a corrosive atmosphere where chemicals are
stored or where aerosol propellants are released.
• Safely position the new unit on a level surface in accordance with all plumbing and building regulations. Use
M10 foot bolts to rmly secure the unit.
• A properly drained overow tray MUST be used where property damage could occur from water spillage.
(See AS/NZS3500.4.2 for further details.)
INSTALLATION DIMENSIONS
724 724
6-Ø 12
764
Inlet/Outlet
R1 ¼” MBSP
CHP020 Installation Dimension
INSTALLATION