OPTITECH OPT-HP-S-265LT User manual

OWNERS MANUAL
OPTITECH 265L HEAT PUMP
Before using your unit, please read this manual carefully and keep it for future reference.
This appliance is not intended for use by persons (including children) with lack of experience and
knowledge, unless they have been given supervision or instruction concerning use of the
appliance by a licenced plumber, electrician, your dealer, or representative of Optitech.
Children should be supervised to ensure that they do not play with the appliance.
The manual can be obtain from our website also: https://optitech.com.au/wp-content/uploads/
Optitech-Heat-Pump-Manual.pdf
WARNING — FOR CONTINUED SAFETY OF THIS APPLIANCE IT MUST BE INSTALLED,
OPERATED AND MAINTAINED IN ACCORDANCE WITH THE MANUFACTURER’S
INSTRUCTIONS.

1
Contents
Introduction....................................................................................................................................................2
Working principle.........................................................................................................................................2
Safety Precautions ......................................................................................................................................3
Installation ......................................................................................................................................................7
Trouble Shooting Guide ............................................................................................................................9
Fault Code ......................................................................................................................................................10
Removing Air from the System...............................................................................................................11
Electrical Connections.................................................................................................................................11
System Operation Outline Continuous Power ...................................................................................11
System Operation If Connected To Off Peak Electricity................................................................12
How to connect power line .......................................................................................................................12
Water Supply Quality...................................................................................................................................13
Change of Water Supply ............................................................................................................................13
Product Parameter........................................................................................................................................14
Hot Water Storage Tank.............................................................................................................................15
Operation Instructions.................................................................................................................................17
Wiring Diagram..............................................................................................................................................19
Warranty...........................................................................................................................................................20
OptiTech International Pty Ltd Contact Details ...............................................................................21
Note: Every effort has been made to ensure accuracy in the preparation of this publication and
no liability for any consequences that may arise from its application.With the continuous
progress of technology,therefore the product series and specifications may be different to
those referenced in this manual. Please contact OptiTech International Pty Ltd for the latest
specifications at the time of installation.

2
Introduction
Thanks for choosing OptiTech air source heat pump for your hot water. Please read this
manual carefully before installation and operation.
Working Principle
The heat pump water heater system heats water by transferring the heat from the
surrounding air to the water using a refrigerant. The refrigerant is heated by a heat
exchanger that absorbs heat from the surrounding air (Figure 1).
Note:
The unit must have a minimum of 5 hours continuous power available at all times to allow
the unit to operate without affecting reliability.

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Safety Precautions
Please ensure you fully observe the precautions
The following instructions need to be fully followed to prevent any harm to users and
others or damage to your property.
The extent of the possible harm or damage caused by misuse of the product falls into the following
classifications:
Warning The column with this classification indicates “the extent of
harm that includes the possibility of death or serious injury”.
The column with this classification indicates “the extent of harm/
damage that includes the possibility of injury or damage to
property"
Caution
The type of content to be observed can be explained with the following pictorial classifications:
Indicates content requiring “attention”.
Indicates content that is prohibited.
Indicates content with “instructions” that need to be followed.
Do not touch the tap spout while hot
water is being delivered.
Do not touch the relief valve, drainage pipe,
drain outlet or drain elbow when inspecting
the relief valve or while draining hot water.
Please check water temperature before
use.
Do not touch the heat pump unit pipes
or hot-water supply pipes.

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Warning
Do not use any damaged, altered or
bundled power cords.
Verify that the piping has all been insulated.
Any of the pipes freezing up and getting
damaged could result in scalding or water
leaking.
Ensure the product is seperate from
any gas containers, sources of fire and
flammable substances.
Do not disassemble, repair or alter the
product in any way.
NEVER
attempt own
repairs or
disassembly.
This could result in electric shock or fire.
Contact the dealer for repair.
Do not open the front grille or cover of
the heat pump compressor.
Do not poke your fingers or a stick into
the air inlet (fins)/air outlet of the heat
pump unit.
Attention!
Rotating
Object!
Could result
in injury.

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Caution
Do not climb or put anything on top of the
unit. Do not apply any force to the piping.
Could result in injuries
from a fall or being
scalded.
Do not use the heat pump unit if the
supplied installation blocks have been
damaged.
Do not put anything susceptible to humidity
under the heat pump unit.
Water could drain
out. In addition,
condensation could
drop from the pipe
connections.
Ensure adequate ventalation at the exhaust
outlet for optimal performance.
Do not block the air inlet and outlet.
Could harmfully
influence performance and lead to
failure.
Remove any snow form the units after snowfalls.
Snow building up
around the heat pump
unit and hot water
storage tank unit could
result in malfunction
and failure.
Check the installation conditions of the unit.
Installation of the unit in the following places could result in accidents or failure and the performance of the
unit not being guaranteed:
Anywhere the lowest temperature reached is -8◦C.
Anywhere not completely flat, unstable or where drainage is difficult.
Ensure not to put anything around the heat pump unit. Could result in poor performance and
unexpected problems.
In winter in particular, please pay attention to any snow or frost.
Optitech do not supply installation blocks
or mounting hardware.

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Caution
Do not use the shower or any hot water for
at least one minute after recovery from a
power cut.
Hot water may
unexpectedly exit from
the shower.
When using the pressure relief valve, be
aware of extremely hot water discharging
In the event of any abnormality, turn the
hot water breaker switch to “OFF”
Do not install the unit anywhere it will be
exposed to seawater.
WARNING:
THIS APPLIANCE DELIVERS WATER AT A
HIGH TEMPERATURE.
DANGER:
Failure to operate the relief valve at least
once every six months may result in the tank
exploding. Continuous leakage of water from
the valve may indicate a problem with the
water heater.

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SAFETY PRECAUTIONS
The appliance is intended to be permanently connected to the water mains and not connected by a hose-
set.
Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
The appliance shall be installed in accordance with national wiring regulations.
DANGER: The operation of the thermal cut-out indicates a possibly dangerous situation. Do not reset the
thermal cut-out until the water heater has been serviced by a qualified person.
DANGER: Failure to operate the relief valve easing gear at least once every six months may result in the
water heater exploding. Continuous leakage of water from the valve may indicate a problem with the water
heater.
If the water supply pressure exceeds the rated pressure, a pressure reducing valve is to be fitted in the
installation.
The water may drip from the discharge pipe of the pressure-relief device and that this pipe must be left
open to the atmosphere;
The pressure-relief device is to be operated regularly to remove lime deposits and to verify that it is not
blocked.
A discharge pipe connected to the pressure-relief device is to be installed in a continuously downward
direction and in a frost-free environment.
The maximum inlet water pressure is 0.5MPA, and the minimum inlet water pressure is 0.1MPA. If the
maximum inlet water pressure is exceeded, a pressure reducing valve needs to be added.
Installation
This OptiTech hot water heat pump system must be installed by a licenced person in consideration
of the following standards and regulations:
•AS/NZS 3500.4 National plumbing and drainage code hot water supply systems – acceptable
solutions.
•HB 263-2004 Heated water systems plumbing industry commission.
•AS/NZS3000 Electrical installations (known as the Australian/New Zealand wiring rules).
•Notice to Victorian customers from the Victorian Plumbing Industry Commission, the Victorian
Building Act 1993 requires that this OptiTech heat pump water heater system must be installed by
a licenced person. Only a licenced person will provide a compliance certificate showing that the
work complies with all the relevant standards. Only a licenced person will have insurance
protecting their workmanship.
•The unit has been specifically designed for domestic hot water heating and may not be suitable
for any other purpose.
•The unit is designed to operate when connected to the town water supply with an operating
pressure rated at 500kPa. To ensure the mains pressure does not exceed this, a pressure-limiting
device that complies with AS1357 can be connected to the town water supply line, but is not
essential.
•This system delivers hot water exceeding 55°C. Reference should be made to AS/NZS 3500.4
and/or local regulations relating to the need for temperature tempering devices.
•The unit must be stored and transported in an upright position. Failure to do so may render the
unit faulty. Such failure is not covered under any warranty agreements. Failure to comply with the
above conditions will void the warranty.
•Clean the nozzle with foam water, and fasten the PTR with a profiling tool. Apply a circle of
anaerobic glue evenly on the threads with more than 3 turns at the starting point of the safety
valve thread, and the threads must be covered with anaerobic glue; the PTR valve outlet faces
down to the ground, and the left and right deviation in the vertical direction does not exceed 15° ,
the thread of the PTR valve shall be screwed in at least 4 threads.
•The effect that the installation shall conform to the Plumbing Code of Australia (PCA).

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•Installation should comply with the Australian Plumbing code AS/NZS 3500.4
•Magnesium rod should be checked regularly annually and replaced in time.
•Recommended Thermostat setting EG (55℃ to match the AS 4234
parameters) Figure 2: Typical Installation Layout
Figure 3:Installation location

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Trouble Shooting Guide
If there is any problem in the operation of the heat pump, please check the following things prior
to calling for support:
STATUS
POSSIBLE CAUSES
TREATMENT MEASURES
Low or no hot water is left in the
storage tank.
Stop using hot water and wait for about an
hour.
Consider a change of the electricity supply
from off-peak mode (length of power supply
hours may be too short for the water
heating cycle to cover the hot water
consumption).
No hot water
comes out of
water tap
Air removing procedure from the
heat pump system may be
insufficient.
Open the water drain plugs on the heat
pump unit to remove air from the water
circuit. (be careful of burning).
Filter on cold inlet connector
may be blocked.
Check the filter and remove if there is any
blockage.
Temperature
of hot water is
too low
Water flow speed may be
dropped due to the heat pump
piping being bent, crushed or
blocked.
Check if any of the piping is bent or
crushed. Remove any kinks if possible.
Pipes may be frozen.
If frozen area is found on the piping, melt
the ice on the pipe and provide a heat
insulation.
Stop valve is closed.
Open the valve.
Air absorption is not sufficient
due to a blockage on the
evaporator.
Remove the object blocking the air flow
through the evaporator (e.g. Fallen leaves,
grass, snow, etc.).
For those problems not listed in the list above, an inspection provided by a skilled engineer is required.
Please contact the distributor.
Caution:
Do not shut down the electricity supplied to the heat pump system even if you go away from home and
hot water is not in use for a long time. (Do not turn off!)

Fault Codes
If the system fails, the fault code display area shows the current fault code.The corresponding
relationship between fault code and fault name is as follows:
Below is the list of the fault code. If the corrective action does not solve the fault problem, a
malfunction of the PCB is likely.
Serial number Fault code Fault name
1 P1 Low pressure fault
2 P2 Over pressure fault
3 P3 Exhaust high temperature protection
4 PP Ambient temperature limit
5 E1 Temperature fault at the bottom of water tank
6 E2 Temperature failure of upper water tank
7 E3 Ambient temperature failure
8 E4 Exhaust temperature failure
9 E5 Return air temperature failure
10 E6 Coil temperature failure
11 EE Data access fault
12 E0 Communication failure

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Removing Air from the System
The following steps must be taken to ensure all air is removed from the system. Incorrect removal
of air may cause the water temperature to vary.
Plumb pipes to the tank unit and the heat pump unit.
Push the lever up on PTR valve to open and fill the tank unit with water.
Confirm that the water comes out of the relief valve and then close the lever.
Open the hot water taps in the home to remove air.
Close the hot water taps in the home after no air is confirmed in the water.
Figure 5: Air removing process
PTR Technical parameters:
PTR valve pressure:850kPa
PTR valve power capacity: 10kW
PTR valve joint:G1/2"
Pressure relief temperature of PTR valve:99◦C
Electrical Connections
PTR valve lever
Plumb pipes to storage tank unit and heat pump
unit.
Push lever on the PTR valve to open and fill in
the tank with water.
Confirm that water is coming out of the relief
valve and then close the lever.
Relief valve leading gear should be operated at
least once every six months. If water does not
discharge freely when the lever is operated, the
valve should be checked by an authorised
agent.
Electrical installation should be done by a licenced electrician who carries out the work according
to the relevant regulations for electrical safety and wiring.
Follow the wiring rules for the breaker rating and the thickness of the electrical wiring.
Verify that the tank unit is full of water and the water stop valves are open before turning on the
power.
System Operation Outline Continuous Power
The system runs its water heating cycle once a day to fill up the storage tank unit with heated
water.
If the block out time function selected (setting covered on page 17 of installation manual) the unit
will not operate during block out times. This function is typically used on installations that have time
of use electricity tariffs.
The water heating cycle operation starts automatically when the temperature of the residual hot
water in the tank unit is 5◦C lower than the set temperature.
The system will not run if the electrical power supply is cut off (i.e. if it is connected to off-peak
power). However, the system will automatically start operation once the electricity becomes
available.

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Please note:
Electrical installation should only be done by a licenced electrician.
System Operation If Connected To Off Peak Electricity
There are no special settings for the off-peak connection. The system will run once the power
becomes available and the temperature in the tank drops below the set point of the tank thermistor.
If connecting the unit to off-peak, ensure that the off peak tariff provides a minimum of 2 hours
continuous power, as it can take at least 2 hours to fill the tank unit with hot water. If the ambient
temperature is lower than 10◦C, this can be longer.
If the unit is connected to off peak and consumption has been higher than usual, hot water might
not be available until the next power supply cycle.
Daily frequency and amount of hot water consumption may also affect the duration of the heating
cycle operation.
Select the electrical supply mode that best suits the customer’s hot water consumption. The type
of off peak connection may need to be changed if hot water supply is not maintained as required.
Figure 6: Outline of electrical system connections
How to connect power line
Connect the power supply line to the terminal block.

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Water Supply Quality
Chloride and pH
In high chloride water supply areas, the water can corrode some parts and cause them to fail. Where the
chloride level exceeds 200mg/litre, warranty does not apply to the heat pump unit and tank unit. pH is a
measure of whether the water is alkaline or acid. In an acidic water supply, the water can attack the parts
and cause them to fail.
No warranty applies to the heat pump unit and tank unit where the pH is less than 6.0. The water supply
from a rainwater tank unit in a metropolitan area is likely to be corrosive due to the dissolution of
atmospheric contaminants.
Water with a pH of less than 6.0 may be treated to raise the pH. It is recommended that an analysis of
the water from a rainwater tank be conducted before connecting this type of water supply to the system.
Figure 7:
Change of Water Supply
Changing or altering from one water supply to another can have detrimental effects on the operation
and/or the life expectancy of the water tank unit cylinder, PTR valve, water heating circulation and the
heat exchanger in the system. Where there is a changeover from one supply to another, for example, a
rainwater tank supply, desalinated water supply, public reticulated water supply or water brought in from
another supply, then water chemistry information should be sought from the supplier, or the water
should be tested to ensure it meets the warranty requirements in this installation manual.
Circulating Water Pump Flow
Changing or alternating from one supply to another can have a detrimental effect on flow rate in loop
between heat pump and tank: 390L/h; actual measurement: 6.5L/min (6.5L x 60min = 390L/hour).
Periodic Inspection: Contact OptiTech for Servicing Quotes
It is recommended that a periodic inspection of the operating controls, heating elements and wiring
should be made by service personnel qualified in electric appliance repair. Most electrical
appliances, even when new, make some sound when in operation. If the hissing or singing sound
level increases excessively, please contact your dealer.
Additionally, it is also recommended that the evaporator and refrigeration circuit are checked every
two years for dust and residues. In dusty environments it may be necessary to have the appliance
checked and cleaned on a more regular basis.
Relief valve leading gear should be operated AT LEAST ONCE EVERY SIX MONTHS. If water
does not discharge freely when the lever is operated, the valve should be checked by an
authorised agent.

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Product Parameter
Heat Pump Unit Dimension
Specifications:
Refrigerant Type
R410a
Mass Volume
950g
Running Ambient Air Temp
-7◦C/+40◦C
Product Weight
43kg
Thermal Capacity
3.5kW
Average Input Power
0.81kW
COP
4.31
Max Power Input
1.24kW
Circuit Breaker Size
5.43
Design Pressure (High/Low)
4.3/0.6 MPa
Protection Raining Class
IPX4
Rated pressure
850kPa
PTR Valve pressure
850kPa
PTR valve power capacity
10kW
PTR valve joint
G1/2"
► 1: Factory default settings 55◦C.
2: Test condition: Outlet water setting 55◦C, inlet water 15◦C.
Ambient Temperature Dry Bulb 20◦C / Wet Bulb 15◦C.
► A pressure reducing valve is to be fitted in the installation.
► Maximum and minimum operating water temperature:35~55◦C.

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Hot Water Storage Tank
Refer drawing provided with tank:
Water Tank Size
Model No:
OPT-HP-S-265LT
A (Height)
1780
B (Hot Water)
1494
C (Cold Water Inlet)
244
D (Diameter)
Ø570
E (Heat pump cycle outlet)
244
F ( Heat pump cycle inlet)
544
G (Sensor Port)
964
H (PTR Valve)
1494

16

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Operation Instructions
Definition of Wire-Controlled Keyboard
1. “ ” ON/OFF Key
A. In the state of unlock, press this key for 1 second to switch on/off.
B. .In other settings state, press this key to return to the main interface.
C. When the screen is locked, press this key for 3 seconds to unlock the screen.
2. “ ” UP Key and “ ”DOWN Key
A. Up and down page turning for parameter values query.
B. Use with the “ ” Key ,the parameters can be queried.
C. In the working state,Press the “ ” key or the “ ” key to set the temperature of the current mode.
When the setting is completed, press the ON/OFF key to confirm. The setting temperature will flicker for
5 seconds and then confirm.
3. “ ” Clock Key
A. Press the clock key to enter the clock setting state.
B. Press the clock key to enter the state of clock setting, press the clock key for 5 seconds to enter the
state of timing on/off setting. Combining the “ ” and the “ ” keys, the start and shutdown time of
the timer group can be set.
4. “ ” Function Key
A. Under the main interface, press this key for 3 seconds to enter the system parameters query, and
automatically return to the main interface after 30 seconds without operation.

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5. Legionella Control Method –Provide Details of Control Strategy
Compressor opens automatically at 1:00am-7:00am every Monday (constant temperature
shutdownand standby status can be opened).
Disinfect once a week.
The default is 61◦C for 35 minutes.
User parameter query
Short press “ ” Key to enter user parameter query status, can query A1-A7 parameters, query
parameters for after-sales fault judgment assistance.
Real-time clock settings
1. In the main interface, press “ ” key and enter the real-time clock setting interface. Digital flickers in the
hour part.
2. Press the “ ” and the “ ” key at this time can set the hours of the real-time clock.
3. When the hour parts is set, press “ ” key, and then the number of the minute part flickers. at this time
press the “ ” or the “ ” to set the minutes of the real-time clock.
4. When the minute part is set, press the “ ” key again to confirm the real-time clock settings and return
to the main interface. If there is no key operation for 30 seconds, the current real-time clock setting value is
confirmed and returned to the main interface.
5. In the real-time clock setting interface, press the “ ” key to confirm the current real-time clock setting
value. If there is no key operation for 30 seconds, confirm the current real-time clock setting value and
return to the main interface.
Timer opening or timer closing
1. On the main interface, after pressing the “ ” key for 4 seconds, it can enter the setting interface of the
timer group one.
2. After entering the timer group 1 interface, press the “ ” key again, which represents the hour part of the
timer start-up time, and then press the “ ”key or the “ ” key, which can set the hour of the timer
group 1 start-up time. After setting the hour part of the timer start-up, press the “ ” key again, which
represents the minute part of the timer start-up time. Flicker of the number of points, at this time bypressing
the “ ”key or the “ ” key, you can set a start-up minutes.
3. Timer is invalid when the time of timer opening and timer closing is the same or parameter 1 is set to 0.
When the time is fixed, pressing the “ ” key can cancel the current timer opening or timer closing.
Code
Name
Code
Name
A1
Down side water tank Temp
A5
Return air Temp
A2
Up Side water tank
A6
Coil Temp
A3
Temp Ambient Temp
A7
Electronic expansion valve opening
A4
Exhaust Temp

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Wiring Diagram
16A RCBO is recommended when installation