Cairox R-AQUA HPB R290 User manual

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02

03
Content
1. Preface............................................................... 04
2. Safety Instructions.............................................. 05
3. Unit Dimension (mm) ......................................... 09
4. Maintenance........................................................11
5. Parameters......................................................... 19
6. Display Operation Guide .................................... 20
7. Failure List & Troubleshooting............................ 33

04
1. Preface
In order to provide customers with high-quality, strong reliable and
good versatile products, this heat pump is manufactured by strict
design and manufacture standards.
This manual includes all the necessary information about installation,
debugging and maintenance. Please read the manual carefully
before you start or maintain the unit.
The manufacturer of this product will not be held responsible if
someone is injured or the unit is damaged, as a result of improper
installation, debugging, unnecessary maintenance which is not in line
with this manual.
The unit must be installed by qualified personnel.
It is vital that the below instructions are adhered to at all times to
keep the warranty.
üThe unit can only be turned on or repaired by a qualified installer or
an authorized dealer.
üMaintenance and operation must be carried out according to the
recommended time and frequency, as stated in this manual.
üUse standard spare parts only.
Failure to comply with these recommendations will invalidate the
warranty.

05
2. Safety Instructions
The manual provides many important security measures for you to use the
air source heat pump water heater. To prevent the users and others from
the unpredictable/unexpected hurt of this unit, and avoid damage on the
unit or other property, please read the manual carefully before using the
unit. All safety measures have safety warnings. The followings are the
meanings of each warning:
Mark Meaning
WARNING
A wrong operation may lead to death or grievous injury on
people.
ATTENTION
A wrong operation may lead to harm on people or loss of
material.
Icon Meaning
Prohibition. What is prohibited will be nearby this icon.
Compulsory implement. The listed action need to be taken.
ATTENTION (include WARNING)
Please pay attention to what is indicated.
1. The hurt means no need to be in hospital and cure for a long time,
it's injury, burn and get an electric shock.
2. The material lost means property and datum lost.
Mark Notes
Icon Notes
W
A
R
N
ING
AT
T
E
N
T
ION
W
A
R
N
ING

06
Installation Meaning
Professional installer
is required.
The heat pump must be installed by qualified personals, to
avoid improper installation which may lead to water leakage,
electrical shock or fire.
Earthing is required.
Please make sure that the unit and power connection have
good earthing, otherwise may cause electrical shock.
Concentration limits
When install the unit in a small room, please take some
measures to prevent the asphyxia caused by the leakage of
refrigerant. Please consult the dealer for concrete measures.
Operation Meaning
PROHIBITION
DO NOT put fingers or others into the fans and evaporator of the
unit, otherwise harm may occur.
Shut off the power.
When there is something wrong or strange smell, the power
supply needs to be shut off to stop the unit. Continue running may
cause short circuit or fire.
Move and Repair Meaning
Entrust
When the heat pump needs to be moved or installed again, please
entrust dealer or qualified person to carry it out. Improper
installation will lead to water leakage, electrical shock, injury or
fire.
Entrust
It is prohibited to repair the unit by the user himself, otherwise
electrical shock or fire may occur.
Prohibit
When the heat pump needs to be repaired, please entrust dealer
or qualified person to carry it out. Improper movement or repair on
the unit will lead to water leakage, electrical shock, injury or fire.
Warning
The appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an
operating gas appliance or an operating electric heater.)

07
Installation Meaning
Installation Place
The unit CANNOT be installed near the flammable
gas. Once there is any leakage of the gas, fire may
occur.
Fix the unit.
Make sure that the basement of the heat pump is
strong enough, to avoid any decline or fall down of the
unit
Need circuit breaker.
Make sure that there is circuit breaker for the unit, lack
of circuit breaker may lead to electrical shock or fire.
Operation
Meaning
Check the installation
basement.
Please check the installation basement regularly (one
month), to avoid any decline or damage on the basement,
which may hurt people or damage the unit.
Switch off the
power.
Please switch off the power when cleaning or maintenance.
Prohibition
It is prohibited to use copper or iron as fuse. The right fuse
must be fixed by electrician for the heat pump.
Prohibition
It is prohibited to spray the flammable gas to the heat
pump, as it may cause fire.
ATTENTION

08
Usage Meaning
Check the plug
The earth electrode of socket should have the perfect earth
wiring and the rating current should be more than 16A. Keep
the socket and plug dry to avoid leakage and check if they are
connected well usually. The check ways are as follow: Put the
plug into the socket and turn on the unit, then pull out the plug
half an hour later and check if the plug is hot. If it is hot (more
than 50 ȭ), please have a qualified socket to replace it to
avoid the burnout or fire caused by the bad contact.
Check power socket
In the water splashed places and may be on the wall, the
installation height of power socket cannot be less than 1.8
meters, to ensure that water does not splash socket, and
cannot be installed in the place that children may touch. As
the water temperature in the tank is very high (over 50 ȭhot
water will burn the body)you should adjust a suitable water
temperature before spraying to the body.
Usage attention
If the unit has not been used more than 2 weeks, please
turn on the hot water tap for a few minutes. Sometimes
there may be an unusual sound like the air passes through
the pipe, the sound is normal and please feel free to use.
Power line replace
If the power line are damaged, ask the professional
serviceman to use the power line provided by the
manufacturer to replace it.
Parts replace
If the parts are damaged, ask the professional serviceman
to use the parts provided by the manufacturer to replace it.
Save labels
Do not tear down any permanent instructions, labels or
parameters panel of the heater.
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09
3. Unit Dimension (mm)
Packing list About the Box
Heat Pump Water Heater × 1
Pressure Release valve × 1

10
Unit:mm
Model HPB-300(R290) HPB-200(R290)
Dimensions
A
B
C
D
E
F
G
1905
1467
1208
1088
128
640
150
1600
1162
903
783
128
640
150
Dimensions
A
F
B
C
D
G
C
Drainage
Pressure Release valve
Hot water outlet
Magnesium
Cold water
inlet
E
E

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4. Maintenance
WARNING:
Servicing shall be performed only as recommended by the manufacturer.
The local assembly should be the ones designated by manufacturer.
The power cable connection should be complied with the local rules.
If you need to remove or reinstall the unit, please ask the qualified person
to make it to avoid improper installation which will lead to water leakage,
electrical shock or fire.
The heat pump should be maintained by qualified person to avoid improper
maintenance which will lead to water leakage, electrical shock or fire.
ATTENTION:
It should keep dry, clean and well-ventilated around the units to maintain its
good effect of heat transfer and energy saving.
Check the parts of the unit and the pressure of the system regularly (once 1
year). If there is any unusual phenomena, repair and replace it immediately.
Check if the electrical wiring is not firm enough and the electrical element
has any unusual action and smell. If so, repair and replace it immediately.
Do not make the unit power off if the unit is not used for a long time. We will
not be responsible for any lost caused by the frost crack of parts due to the
long time power off.
Check if the power socket and plug have a good contacting, perfect
earthing and thermal protections.
In the cold area (below 0 ć), if you do not use the unit for a long time,
please drain the water in the tank to avoid the damage due to freeze.
It is recommended that the set temperature can be set lower when there is
enough hot water for daily life to save energy and extend the service life of
water heater.
The safety cable specification is 5A/250VAC, and must meet the explosion-
proof requirements.
Be aware that refrigerants may not contain odour.
Water quality shall meet the following conditions.

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Water
heater
system
Total
Dissolved
Solids
(TDS)
mg/L or
ppm
Hardness
(as
CaCO3)
mg/L or
ppm
Saturation
index
(Langelier)
PH
Dissolved
Co2 mg/L
or ppm
Chloride
s mg/L
or ppm
2500* 200 +0.4to-1.0
@65ć
6.5
to
9.5
NA NA
*For TDS levels up to and including 800mg/liter the magnesium based
anode is to be used. It is recommended that magnesium anode be
checked annually. This is the anode fitted during manufacture of the
cylinder. For TDS levels greater than 800mg/liter and not exceeding
2500mg/liter the magnesium-based anode is to be used. Frequently
inspection of magnesium anode is recommended. This anode Can be
fitted by an authorized person. This Warranty does not apply if the TDS
exceeds 2500 mg/liter.
Information on Maintenance and servicing:
1) Checks to the area
Prior to beginning work on systems containing flammable refrigerants,
safety checks are necessary to ensure that the risk of ignition is
minimized. For repair to the refrigerating system, the following
precautions shall be complied with prior to conducting work on the
system
2) Work procedure
Work shall be undertaken under a controlled procedure so as to minimise
the risk of a flammable gas or vapour being present while the work is
being performed
3) General work area
All maintenance staff and others working in the local area shall be
instructed on the nature of work being carried out. Work in confined
spaces shall be avoided. The area around the work space shall be
sectioned off. Ensure that the conditions within the area have been made
safe by control of flammable material.
4) Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior
to and during work, to ensure the technician is aware of potentially
flammable atmospheres. Ensure that the leak detection equipment
being used is suitable for use with flammable refrigerants, i.e. non-
sparking, adequately sealed or intrinsically safe.
5) Presence of fire extinguisher

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If any hot work is to be conducted on the refrigeration equipment or any
associated parts appropriate fire extinguishing equipment shall be
available to hand. Have a dry powder or CO2 fire extinguisher adjacent
to the charging area
6) No ignition sources
No person carrying out work in relation to a refrigeration system which
involves exposing any pipe work that contains or has contained
flammable refrigerant shall use any sources of ignition in such a
manner that it may lead to the risk of fire or explosion. All possible
ignition sources, including cigarette smoking, should be kept sufficiently
far away from the site of installation, repairing, removing and disposal,
during which flammable refrigerant can possibly be released to the
surrounding space. Prior to work taking place, the area around the
equipment is to be surveyed to make sure that there are no flammable
hazards or ignition risks. "No Smoking" signs shall be displayed
7) Ventilated area
Ensure that the area is in the open or that it is adequately ventilated
before breaking into the system or conducting any hot work. A degree
of ventilation shall continue during the period that the work is carried
out. The ventilation should safely disperse any released refrigerant and
preferably expel it externally into the atmosphere.
8) Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for
the purpose and to the correct specification. At all times the
manufacturer's maintenance and service guidelines shall be followed. If
in doubt consult the manufacturer's technical department for
assistance.
The following checks shall be applied to installations using flammable
refrigerants
-The charge size is in accordance with the room size within which the
refrigerant containing parts are installed:
-The ventilation machinery and outlets are operating adequately and
are not obstructed;
- If an indirect refrigerating circuit is being used, the secondary circuit
shall be checked for the presence of refrigerant;
-Marking to the equipment continues to be visible and legible. Markings
and signs that are illegible shall be corrected;
-Refrigeration pipe or components are installed in a position where they
are unlikely to be exposed to any substance which may corrode
refrigerant containing components, unless the components are
constructed of materials which are inherently resistant to being
corroded or are suitably protected against being so corroded.
9) Checks to electrical devices

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Repair and maintenance to electrical components shall include initial
safety checks and component inspection procedures. If a fault exists
that could compromise safety, then no electrical supply shall be
connected to the circuit until it is satisfactorily dealt with. If the fault
cannot be corrected immediately but it is necessary to continue
operation, an adequate temporary solution shall be used. This shall be
reported to the owner of the equipment so all parties are advised
Initial safety checks shall include˖
That capacitors are discharged: this shall be done in a safe manner to
zavoid possibility of sparking,
zThat there no live electrical components and wiring are exposed
while charging, recovering or purging the system;
zThat there is continuity of earth bonding.
Repairs to sealed components
1) During repairs to sealed components, all electrical supplies shall be
disconnected from the equipment being worked upon prior to any removal
of sealed covers, etc. If it is absolutely necessary to have an electrical
supply to equipment during servicing, then a permanently operating form of
leak detection shall be located at the most critical point to warn of a
potentially hazardous situation.
2) Particular attention shall be paid to the following to ensure that by
working on electrical components, the casing is not altered in such a way
that the level of protection is affected. This shall include damage to cables,
excessive number of connections, terminals not made to original
specification, damage to seals, incorrect fitting of glands, etc. Ensure that
apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded such that they no
longer serve the purpose of preventing the ingress of flammable
atmospheres. Replacement parts shall be in accordance with the
manufacturer's specifications.
NOTE: The use of silicon sealant may inhibit the effectiveness of some
types of leak detection equipment. Intrinsically safe components do not
have to be isolated prior to working on them
Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit
without ensuring. that this will not exceed the permissible voltage and
current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on
while live in the presence of a flammable atmosphere. The test apparatus

15
shall be at the correct rating. Replace components only with parts specified
by the manufacturer. Other parts may result in the ignition of refrigerant in
the atmosphere from a leak
Cabling
Check that cabling will not be subject to wear, corrosion, excessive
pressure, vibration. sharp edges or any other adverse environmental
effects. The check shall also take into account the effects of aging or
continual vibration from sources such as compressors or fans.
Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used in the
searching for or detection of refrigerant leaks. A halide torch (or any other
detector using a naked flame) shall not be used.
Leak detection methods
The following leak detection methods are deemed acceptable for systems
containing flammable refrigerants.
Electronic leak detectors shall be used to detect flammable refrigerants, but
the sensitivity may not be adequate, or may need re-calibration. (Detection
equipment shall be calibrated in a refrigerant-free area.) Ensure that the
detector is not a potential source of ignition and is suitable for the
refrigerant used. Leak detection equipment shall be set at a percentage of
the LFL of the refrigerant and shall be calibrated to the refrigerant employed
and the appropriate percentage of gas (25 % maximum) is confirmed.
Leak detection fluids are suitable for use with most refrigerants but the use
of detergents containing chlorine shall be avoided as the chlorine may react
with the refrigerant and corrode the copper pipe-work
If a leak is suspected, all naked flames shall be removed/ extinguished
If a leakage of refrigerant is found which requires brazing, all of the
refrigerant shall be recovered from the system, or isolated (by means of
shut off valves) in a part of the system remote from the leak. Oxygen free
nitrogen (OFN) shall then be purged through the system both before and
during the brazing process.
Removal and evacuation
When breaking into the refrigerant circuit to make repairs - or for any other
purpose conventional procedures shall be used. However, it is important
that best practice is followed since flammability is a consideration. The
following procedure shall be adhered to:
Remove refrigerant;
Purge the circuit with inert gas;
Evacuate:

16
Purge again with inert gas;
Open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct recovery
cylinders. The system shall be "flushed" with OFN to render the unit
safe. This process may need to be repeated several times. Compressed air
or oxygen shall not be used for this task Flushing shall be achieved by
breaking the vacuum in the system with OFN and continuing to fill until the
working pressure is achieved, then venting to atmosphere, and finally
pulling down to a vacuum. This process shall be repeated until no
refrigerant is within the system. When the final OFN charge is used, the
system shall be vented down to atmospheric pressure to enable work to
take place. This operation is absolutely vital it brazing operations on the
pipe-work are to take place
Ensure that the outlet for the vacuum pump is not close to any ignition
sources and there is ventilation available.
Charging procedures
In addition to conventional charging procedures, the following requirements
shall be followed
- Ensure that contamination of different refrigerants does not occur when
using charging equipment. Hoses or lines shall be as short as possible to
minimise the amount of refrigerant contained in them.
- Cylinders shall be kept upright.
- Ensure that the refrigeration system is earthed prior to charging the
system with refrigerant.
- Label the system when charging is complete (if not already).
- Extreme care shall be taken not to overfill the refrigeration system.
Prior to recharging the system it shall be pressure tested with OFN. The
system shall be leak tested on completion of charging but prior to
commissioning. A follow up leak test shall be carried out prior to leaving the
site.
Decommissioning
Before carrying out this procedure, it is essential that the technician is
completely familiar with the equipment and all its detail. It is recommended
good practice that all refrigerants are recovered safely. Prior to the task
being carried out, an oil and refrigerant sample shall be taken in case
analysis is required prior to re-use of reclaimed refrigerant. It is essential
that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically
c) Before attempting the procedure ensure that:
Mechanical handling equipment is available, if required, for handling

17
refrigerant cylinders:
zAll personal protective equipment is available and being used correctly;
zThe recovery process is supervised at all times by a competent person;
zRecovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible
e) If a vacuum is not possible, make a manifold so that refrigerant can be
removed from various parts of the system
f) Make sure that cylinder is situated on the scales before recovery takes
place
g) Start the recovery machine and operate in accordance with
manufacturer's instructions.
h) Do not overfill cylinders. (No more than 80 % volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even
temporarily
j) When the cylinders have been filled correctly and the process completed,
make sure that the cylinders and the equipment are removed from site
promptly and all isolation valves on the equipment are closed off
k) Recovered refrigerant shall not be charged into another refrigeration
system unless it has been cleaned and checked
Labelling
Equipment shall be labelled stating that it has been de-commissioned and
emptied of refrigerant. The label shall be dated and signed. Ensure that
there are labels on the equipment stating the equipment contains
flammable refrigerant.
Recovery
When removing refrigerant from a system, either for servicing or
decommissioning, it is recommended good practice that all refrigerants are
removed safely.
When transferring refrigerant into cylinders, ensure that only appropriate
refrigerant recovery cylinders are employed. Ensure that the correct number
of cylinders for holding the total system charge is available. All cylinders to
be used are designated for the recovered refrigerant and labelled for that
refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders
shall be complete with pressure relief valve and associated shut-off valves
in good working order. Empty recovery cylinders are evacuated and, if
possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of
instructions concerning the equipment that is at hand and shall be suitable
for the recovery of flammable refrigerants. In addition, a set of calibrated
weighing scales shall be available and in good working order. Hoses shall
be complete with leak-free disconnect couplings and in good

18
condition. Before using the recovery machine, check that it is in satisfactory
working order, has been properly maintained and that any associated
electrical components are sealed to prevent ignition in the event of a
refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the
correct recovery cylinder, and the relevant Waste Transfer Note
arranged. Do not mix refrigerants in recovery units and especially not in
cylinders.
If compressors or compressor oils are to be removed, ensure that they have
been evacuated to an acceptable level to make certain that flammable
refrigerant does not remain within the lubricant. The evacuation process
shall be carried out prior to returning the compressor to the suppliers. Only
electric heating to the compressor body shall be employed to accelerate
this process. When oil is drained from a system, it shall be carried out
safely

19
5. Parameters
Model HPB-200(R290) HPB-300(R290)
Power Supply
/
230V~/50Hz
230V~/50Hz
Moisture Resistance
IPX
IPX1
IPX1
Electrical Shockproof
I
I
I
Heating Capacity Range
kW
1.5
1.5
Heating Power Input Range
kW
0.41
0.41
Heating Current Input Range
A
1.8
1.8
Auxiliary E-heater
kW
1.5
1.5
Max. Power Input
kW
2.2
2.2
Max. Current Input
A
9.3
9.3
Refrigerant / Proper Input
g
R290 / 150g
R290 / 150g
Unit Dimension(L/W/H)
mm
ĭ640×1600
ĭ640×1905
Rated Outlet Water Temperature
ć
55
55
Air Volume
m /h
350
350
Air Pressure
Pa
40
40
Air Duct Diameter
mm

150

150
Water Inlet/Outlet Size
inch
3/4"
3/4"
Compressor
Rotary
Rotary
3
Measurement conditions: Instant heating: Ambient temperature20℃/15℃,Water inlet 15℃Water outlet 55℃.
Work range：(1).Ambient temperature is -5℃~43℃(Heat Pump).
(2).The max temperature of water tank is 60℃.Operating parameters:
The range of the operating water temperatures: 10~60℃. The range of the operating water pressures: 0.15~0.7MPa.

20
6. Display Operation Guide
6.1. Function of wire controller
1˅Function of key
NO. Button Name Function
1 ON/OFF Turn on/off the unit.
2 Mode Switch unit running modes or save setting
parameters.
3 Clock Set the clock or the timer.
4
Electric
Heater
Turn on/off the electric heater or switch
fan modes.
5 Up Move up or increase parameter values.
6 Down Move down or decrease parameter
values.