ThermoTec MINI Service manual

THERMOTEC MINI
SWIMMING POOL HEAT PUMP
Installation & Instruction Manual

CONTENTS
1
4
4
5
6
6
7
7
8
8
9
10
10
11
13
13
14
19
24
24
1. Preface
2. Specifications
2.1 Performance Data of Swimming Pool Heat Pump Unit
2.2 Dimensions for Swimming Pool Heat Pump Unit
3. Installation and Connection
3.1
3.2
3.3 How Close to Your Pool?
3.4 Swimming Pool Heat Pumps Plumbing
3.5 Swimming Pool Heat Pumps Electrical Wiring
3.6 Initial Start-up of the Unit
4.
4.1
4.2
4.3
4.4
5. Maintenance and Inspection
6.
Installation illustration
Swimming Pool Heat Pumps Location
Function of wire controller
The controller usage
Trouble Shooting Guide
Parameter table
4.5 Interface diagram
Appendix
6.1 Cable specification
6.2 Comparison table of refrigerant saturation temperature
6.3 Explosive view of the unit
Use and Operation Instruction of Wire Controller
25
16
4.6 Operation instruction of Bluetooth
26

1. PREFACE
1
In order to provide our customers with quality, reliability and versatility, this product has
been made to strict production standards. This manual includes all the necessary
information about installation, debugging, discharging and maintenance. Please read this
manual carefully before you open or maintain the unit. The manufacture of this product will
not be held responsible if someone is injured or the unit is damaged, as a result of
improper installation, debugging, or unnecessary maintenance. It is vital that the
instructions within this manual are adhered to at all times.
The unit can only be repaired by qualified installer centre , personnel or an authorised
dealer.
Maintenance and operation must be carried out according to the recommended time
and frequency, as stated in this manual.
Use genuine standard spare parts only.
Failure to comply with these recommendations will invalidate the warranty.
The Swimming Pool Heat Pump heats the swimming pool water and keeps the
temperature constant.
Our heat pump has following characteristics:
1 Durable
The heat exchanger is made of PVC & Titanium tube which can withstand prolonged
exposure to swimming pool water.
2 Installation flexibility
The unit can be installed outdoors.
3 Quiet operation
The unit comprises an efficient rotary/ scroll compressor and a low-noise fan motor,
which guarantees its quiet operation.
4 Advanced controlling
The unit includes micro-computer controlling, allowing all operation parameters to be
set. Operation status can be displayed on the LCD wire controller.
WARNING
Do not use means to accelerate the defrosting process or to clean,
Other than those recommended by the manufacturer.
When not in use, the appliance shall be stored in a room
without ignition sources (for example:open flames, an
Operating gas appliance or an operating electric heater.)
Do not pierce or burn.
Be aware that refrigerants may not contain an odour,
Appliance shall be installed,operated and stored in a room with a floor area larger than 30m2.
NOTE The manufacturer may provide other suitable examples or may provide additional
information about the refrigerant odour.

This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved. Children shall not play with
the appliance. Cleaning and user maintenance shall not be made by children without
supervision.
The appliance shall be installed in accordance with national wiring regulations.
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.
Before obtaining access to terminals, all supply circuits must be disconnected.
An all-pole disconnection device which has at least 3mm clearances in all poles , and have a
leakage current that may exceed 10mA, the residual current device (RCD) having a rated residual
operating current not exceeding 30mA, and disconnection must be incorporated in the fixed wiring
in accordance with the wiring rules.
1. PREFACE
2
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.)
Do not pierce or burn
Appliance shall be installed, operated and stored in a room with a floor area larger than 30
m2
Be aware that refrigerants may not contain an odour.
The installation of pipe-work shall be kept to a minimum 30 m2
Spaces where refrigerant pipes shall be compliance with national gas regulations.
Servicing shall be performed only as recommended by the manufacturer.
The appliance shall be stored in a well-ventilated area where the room size corresponds to
the room area as specified for operation.
All working procedure that affets safety means shall only be carried by competent persons.
Transport of equipment containing flammable refrigerants
Compliance with the transport regulations
Marking of equipment using signs
Compliance with local regulations
Disposal of equipment using flammable refrigerants
Compliance with national regulations
Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer's instructions.
Storage of packed (unsold) equipment
Storage package protection should be constructed such that mechanical damage to the
equipment inside the package will not cause a leak of the refrigerant charge.
The maximum number of pieces of equipment permitted to be stored together will be
determined by local regulations.

1. PREFACE
3
1. The unit can only be repaired by qualified installer centre personnel or an authorised dealer.
for Europe market
2. 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 Europe market
Children should be supervised to ensure that they do not play with the appliance.
3. Please make sure that the unit and power connection have good earthing, otherwise may
cause electrical shock.
4. If the supply cord is damaged, it must be replaced by the manufacturer or our service agent
or similarly qualified person in order to avoid a hazard.
5. Directive 2002/96/EC (WEEE):
The symbol depicting a crossed-out waste bin that is underneath the appliance indicates
that this product, at the end of its useful life, must be handled separately from domestic
waste, must be taken to a recycling centre for electric and electronic devices or handed
back to the dealer when purchasing an equivalent appliance.
6. Directive 2002/95/EC (RoHs): This product is compliant with directive 2002/95/EC (RoHs)
concerning restrictions for the use of harmful substances in electric and electronic devices.
7. The unit CANNOT be installed near the flammable gas. Once there is any leakage of the gas
, fire can be occur.
8. Make sure that there is circuit breaker for the unit, lack of circuit breaker can lead to
electrical shock or fire.
9. The heat pump located inside the unit is equipped with an over-load protection system. It
does not allow for the unit to start for at least 3 minutes from a previous stoppage.
10. The unit can only be repaired by the qualified personnel of an installer center or an
authorized dealer.
11. Installation must be performed in accordance with the NEC/CEC by authorized person only.
for North America market
12. USE SUPPLY WIRES SUITABLE FOR 75 .
13. Caution: Single wall heat exchanger, not suitable for potable water connection.
Caution & Warning

4
2.SPECIFICATION
2.1 Performance data of Swimming Pool Heat Pump
*** REFRIGERANT : R32
420 x 350 x 380
450 x 420 x 400
see nameplate
see package label
Heating: Outdoor air temp: , Inlet water temp:26℃
Outdoor air temp: 15℃/12℃, Inlet water temp:26℃
Operating range:
Ambient temperature: -7-43℃
Water temperature:15-44℃
27℃/24.3℃
UNIT
Heating capacity
(27/24.3℃ ）
Heating Power Input
COP
Heating capacity
(15/12℃ ）
Heating Power Input
COP
Power Supply
Compressor Quantity
Compressor
Fan Number
Fan Power Input
Fan Rotate Speed
Fan Direction
Noise
Water Connection
Water Flow Volume
Water Pressure Drop(max)
Unit Net Dimensions(L/W/H)
Unit Ship Dimensions(L/W/H)
Net Weight
Shipping Weight
kW
Btu/h
kW
kW
Btu/h
kW
W
RPM
dB(A)
mm
3
m /h
kPa
mm
mm
kg
kg
220~240V～/50Hz
1
rotary
1
25
800
horizontal
Thermotec Mini 5kw
5
17060
0.98
5.10
3.3
11260
0.89
3.3
50
32
1.8
2.8
220~240V～/50Hz
1
rotary
1
25
800
horizontal
Thermotec Mini 4kw
4
13648
0.8
5.0
2.7
9212
0.73
3.7
49
32
1.2
1.8

2.2 Dimensions for Swimming Pool Heat Pump
2.SPECIFICATION
5
U NIT: Thermotec Mini 4kw/Thermotec Mini 5kw
380
420
Water Inlet 32+38
Water Outlet 32+38

6
Installation items:
The factory only provides the heat pump, the other items in the illustration are necessary
parts for the operation of the system which are supplied by the end user or the installer.
3.1 Installation illustration
Attention:
3.INSTALLATION AND CONNECTION
Chlorinator cell
Water outlet
Pool
Valve
Water supply
Water inlet Water pump
Sand filter
(or other type filter)
The schematic diagram is for reference only. Please check the water inlet/outlet labels on the heat
pump when connecting the pipes

7
3.INSTALLATION AND CONNECTION
3.2 Swimming Pool Heat Pump Location
The unit will perform well in any outdoor location provided that the following three factors are
presented:
1.
Fresh Air - 2. Electricity - 3. Water supply
The unit may be installed virtually anywhere outdoors. For indoor pools please consult the
supplier. Unlike a gas heater, it has no draft or pilot light problem in a windy area.
DO NOT place the unit in an enclosed area with a limited air volume, where the units
discharge air will be re-circulated.
DO NOT place the unit blowing onto shrubs or fences which can cause recirculation of the
expelled air. Recirculation of the expelled air will reduce the heat output of the heat pump and
may cause it to ice up, even in warm weather.
Normally, the pool heat pump is installed within 2.5 metres of the pool. The longer the
distance from the pool, the greater the heat loss from the hoses. Heat loss is minimal for runs
of up to15 meters(15 meters to and from the pump = 30 meters total),.
A very rough estimate of heat loss per 30 meters is 0.6 kW-hour,(2000BTU) for every 5c
difference in temperature between the pool water and the ground surrounding the pipe, which
translates to about 3% to 5% increase in run time.
3.3 How Close To Your Pool?
Air inlet
Air outlet
300mm
700mm
300mm
500mm
700mm
Air outlet

3.INSTALLATION AND CONNECTION
8
3.4 Swimming Pool Heat Pump Plumbing
Location: Connect the unit in the pool pump discharge (return) line downstream of the filter and
circulation pump, but upstream of any chlorinators, ozonators or chemical pumps.
Condensation: Since the heat pump cools down the air by about 4 -5c, condensation will condense
on the fins of the evaporator. If the relative humidity is very high, this could be as much as several
litres an hour. The water will run down the fins into the base of the heat pump and will drain out
through the drain holes on the bottom of the heat pump.
It is easy to mistake the condensation for a water leak inside the heat pump.
If you turn off the heat pump, but allow the pool water to continue running through it, then after
around 30-mins, the condensation will stop.
A quick way to verify that the water is condensation is to shut off the heat pump but keep the pool
circulation pump running. If the water stops running out of the basepan, after around 30 mins, then
it is condensation. AN EVEN QUICKER WAY IS to TEST THE DRAIN WATER FOR CHLORINE - if
there is no chlorine present, then it is normal condensation.
From pump
To pool
Flexible hose tail pipe
The Swimming Pool Heat Pump titanium heat exchanger requires no special plumbing
arrangements except a bypass(please set the flow rate according to the faceplate) The water
pressure drop is less than 10kPa at max. flow rate. Flexible hoses or solid PVC pipe can be run
straight into the unit.
3.5 Swimming Pool Heat Pump Electrical Wiring
NOTE: Although the unit heat exchanger is electrically isolated from the rest of the unit, it simply
prevents the flow of electricity to or from the pool water. Earthing the unit is still required to
protect you against short circuits
The heat pump is supplied with an inline RCD and UK plug.
If the unit is connected to an outdoor socket, then the outdoor socket should be protected by an
RCD
Disconnect - A disconnect means (circuit breaker , fused or un-fused switch) should be located
within sight of and readily accessible from the unit, This is common practice on commercial and
residential air conditioners and heat pumps. It prevents remotely-energizing unattended equipment
and permits turning off power at the unit while the unit is being serviced.

3.INSTALLATION AND CONNECTION
3.6Initial startup of the Unit
NOTE- In order for the heat pump to heat the pool, the pool circulation pump must be
running to circulate water through the heat pump.
Start up Procedure - After installation is completed, you should follow these steps:
1. Turn on your pool circulation pump. Check for water leaks and verify flow to and from the pool.
2. Turn on the electrical power supply to the unit, then press reset button on the RCD
Then press the ON/OFF button on the display panel. The heat pump should then start
3.
After running a few minutes make sure the air leaving the fan should be cooler(Between 5-10 ℃ )
4. With the unit operating turn the filter pump off. The unit should also turn off automatically,
5. Allow the unit and pool pump to run 24 hours per day until desired pool water temperature
is reached. When the water-in temperature reaches this setting, the unit will slow down for a period
of time, if the temperature is maintained for 45 minutes the unit will turn off. The unit will now
automatically restart (as long as your pool pump is running)when the pool temperature drops more
than 0.5 below set temperature.
Time Delay- The unit is equipped with a 3 minute built-in solid state restart delay included to protect
control circuit components and to eliminate restart cycling and contactor chatter. This time delay
will automatically restart the unit approximately 3 minutes after each control circuit interruption.
Even a brief power interruption will activate the solid state 3 minute restart delay and prevent the
unit from starting until the 5 minute countdown is completed.
9
Water Flow Switch
The Thermotec Mini is equipped with a water flow switch. This turns on the heat pump when there
is sufficient water flow to operate the internal flow switch.
If your unit displays the E03 message, please check that your circulation pump is running. If it is but
you still get the E03 message, please check that the filter is clean and if the pump/filter has
sufficient flow rate for the Thermotec Mini
When the pool circulation pump is turned off, the heat pump will shut down and show the E03 code.
When the pool circulation pump is re-started the E03 message will clear and the heat pump will
restart.
This also allows an external time clock to be used on the circulation pump which will then control
the Thermotec Mini

10
4.Use and Operation Instruction of Wire Controller
Key Name Function
On/off
Up
Press this key to turn on/off the unit.
Press this button can increase parameter value.
Press this button can decrease the parameter value.
Down
LED display
1. Function of wire controller

11
4.Use and Operation Instruction of Wire Controller
2.2 Settings and viewing the set point (Desired water temperature)
In OFF mode and in ON mode
Press once the button or to view the set point.
Press the button or again to set the desired set point.
Note: The settings are automatically saved after 3 s if no button is pressed.
Remark:
Long press for more
than 2s to change each time
“ ” or “ ”
Short press, long press
“ ” to change each time within 2s
“ ” or
Operation
Range of temp. Variation 0.5℃ / 1℉1℃ / 1℉
Standby interface Running interface
Actual water
temp.
2.1 ON/ OFF mode
2. The controller usage
When the unit is off, press the key and hold on for 0.5-5 seconds to turn on the unit;
When the unit is on, press the key and hold on for 0.5-5 seconds to turn off the unit.
Press
for 0.5-5 s
Press
for 0.5-5 s

12
4.Use and Operation Instruction of Wire Controller
Water inlet temp. sensor failure
2.3 Mode setting
o
seconds
i , if p
In the main interface, press and for 0.5 can set the mode, press or to
change the current mode, you can switch different modes of co ling, heating and auto mode.
If there is no operation for 5 system will memorize the current mode and back to the
main nterface ress the change will not be saved and return to the main interface.
seconds
Press and
for 0.5 seconds
Cooling
mode
Auto mode Heating
mode
Press or
Press or
2.4 Malfunction display
There will be malfunction code showing on the controller screen when relative malfunction
occurs.
If there are more than one malfunctions occurs at the same time, you can check the current
error codes list by pressing or key.
In the main interface, if there is no operation for 20seconds, it will return to the malfunction
display. You can refer to the malfunction table to find out the failure cause and solution.

13
4.Use and Operation Instruction of Wire Controller
3. Trouble Shooting Guide
Temp. is too much different
between water-inlet and outlet
Defrost
Malfunction
Ambient temp. sensor failure
No water flow or flow switch failure
Communication failure
Water inlet temp. sensor failure
Water outlet temp. sensor failure
Coil temp. sensor failure
Exhaust temp. sensor failure
High pressure protection
Low pressure protection
Low ambient temp. protection TP
DF
Display
P04
E03
E08
P01
P02
P81
E01
E02
E06 Water temp. difference between
inlet and outlet is too large
Ambient temperature is too low
Is time to defrost
Cause
The ambient temp. sensor is open
or short circuit
No water flow of insufficient
water flow
Communication failure between
remote wire controller and main
board
The water inlet temp. sensor is
open or short circuit
The water outlet temp. sensor
is open or short circuit
The coil temp. sensor is open or
short circuit
The exhaust pipe temp. sensor is
open or short circuit
The exhaust pressure is high, high
pressure switch action
The suction pressure is low, low
pressure switch action
Solution
Check or change the ambient temp.
sensor
Check the water flow rate, ensure
that the filter is running and is not
dirty or blocked
Check the wire connection between
remote wire controller and main
board
Check or change the water inlet
temp. sensor
Check or change the water outlet
temp. sensor
Check or change the coil temp.
sensor
Check or change the exhaust temp.
sensor
Check high pressure switch and
cooling return circuit
Check low pressure switch and
cooling return circuit
Exhaust temp. protection P82 The exhaust temp is high . Check refrigerant is enough or not
Check the ambient temp. value
Check the pipe water flow and
whether water system is jammed or
not
End defrosting
P05
4. Parameter table
Set-point of mode target temp. cooling
Meaning Default Remarks
27℃Adjustable
Set-point of target temp. heating mode 27℃Adjustable
Set-point of target temp. auto mode 27℃Adjustable
The common failure cause and solution.

14
4.Use and Operation Instruction of Wire Controller
5.2 Controller interface diagram and definition
Connections explanation：
5. Interface diagram
5.1 Wire control interface diagram and definition
3.3V
NET
GND
Sign Meaning
3.3V
NET
GND
3.3V（power +）
Communication signal
GND(power-)
T1
13
1
Fan motor(220-230VAC)
T6
No. Symbol Meaning
Compressor of system1(220-230VAC)
3-core communication
4
5
6
7
8
9
High pressure protection
Low pressure protection
2
Neutral wire
3
10
T2
11
Water outlet temperature(input)
Water inlet temperature(input)
Ambient temperature(input)
Coil temperature( input)
CN 1
JP 1
12
Exhaust temperature( )input
T5
T7
T8
T9
PGND1
RL 3
RL 2
RL 1
Grounding
Water pump/ 220-230VAC) 4-way valve(
T4
T3
CN 3
14
15
16
Live wire
Water flow switch
Reserve
13
T1
CN1
CN3 RL3 RL1
RL2
T3
T2
T1
T9
T8
T7T6
T5
T4 JP1
PGND1
MN1001
SWD_CLK
SWD_I0
GND
VCC
CN6
SWD_I0
SWD_CLK
VCC
GND
CN5
212121212121212121 1 2 3

15
4.Use and Operation Instruction of Wire Controller
：
N
4V
N4V
N N
FM
C2
BLK BLU
RED
TO POWER SUPPLY
COMP
220-240V~/50Hz
CC CR
CS
BLK
RED WHT
N
N
N
N
CC
CS
CR
C1
AT
t
50K
ET
3
Controller
L
RED
K1
CC
N
K1
K1
N
K1
L
LP
OT
t
5K
t
5K
CT
t
5K
IT
ACL
COMP
FM
RL2
ACN
CN1
T9T8T7 T1 JP1T2
CN6
CN5
T3
T6
T5
T4
4V
RL1RL3CN3
ACL
CN4
BRN BLU Y/G
N
RED
BLU
Y/G
LN
N
L
N
FS
RED
BLU
BLK
13
42
5
6
7
N8
01
N
N
4V
t
5K
AT
COMP
CT
FM
FS
LP
IT
K1
ET
Field wiring 220-240V AC
Factory wiring
220-240V AC
Low voltage
Ambient temperature
Compressor
Coil temperature
Exhaust temperature
Fan motor
Flow switch
Inlet water temperature
Relay of compressor
Low pressure protection
Outlet Water Temperature
4 way valve
4V
Describe
NO.
OT
CODE：20221019-0008
N
Thermotec Mini 4kw
4V
N4V
N N
FM
C2
BLK BLU
RED
TO POWER SUPPLY
COMP
220-240V~/50Hz
CC CR
CS
BLK
RED WHT
N
N
N
N
CC
CS
CR
C1
AT
t
50K
ET
3
Controller
L
RED
K1
CC
N
K1
K1
N
K1
L
LP
OT
t
5K
t
5K
CT
t
5K
IT
MN1001
ACL
COMP
FM
RL2
ACN
CN1
T9T8T7 T1 JP1T2
CN6
CN5
T3
T6
T5
T4
4V
RL1RL3CN3
ACL
CN4
BRN BLU Y/G
N
RED
BLU
Y/G
LN
N
L
N
FS
RED
BLU
BLK
6.8K
13
24
5
6
7
8
01 N
N
N
4V
Ambient temperature
Compressor
Coil temperature
Fan motor
Flow switch
Low pressure protection
Inlet water temperature
Relay of compressor
Outlet water temperature
Exhaust temperature
AT
COMP
CT
FM
FS
LP
IT
K1
OT
ET
Field wiring 220-240V AC
Factory wiring 220-240V AC
Low voltage
4 way valve
4V
Describe
NO.

16
4.Use and Operation Instruction of Wire Controller
6. Operation instruction of Bluetooth
(1) Account Login
Use email address and password to register, login or reset the password.
Fig.1 Login interface Fig.3 Forgot Password interfaceFig.2 Account Registration interface
1
2
3
5
4
6
7
8
9
User Name
Enter Email
Enter PassWord
Enter Email
Enter PassWord
Account Registration
Confirm Password
Enter Email Verificat...
Enter Email
Enter PassWord
Confirm Password
Enter Email Verification Code
Privacy Policy
Send V...on code
Send V...on code
Forgot Password

17
4.Use and Operation Instruction of Wire Controller
(2) Add Device
After log in, displays My Device interface (Fig. 4) , follow the instruction to add and
bond device.
Fig.5 The left-hand menu Fig.4 My Device interface Fig.6 Add Device interface
1 2
12
1. Account Registration: To register an account, click 1 (Fig.1) to jump to the Account Registration interface,
fill in the relevant information and click 2 to receive verification code, while completed the application
information, click 3 to read the details of the Privacy Policy, then click 4 to agree, and click 5 , registration
is done.
Please note, the valid time of one verification code is 15min, please fill in the verification code within 15min,
otherwise you need to ask for a new one.
2. Log in: Follow the instructions on the page(Fig.1 ), enter your registered email address and password, click
6 and jump to device list;
3. Forgot Password: While forget your password, click 7 (Fig.1 ), jump to the Forgot Password interface
(Fig.3 ). Follow the instructions on the page, fill in the relevant informations, click 8 to receive verification
code from your mailbox, click 9 to comfirm and password reset is done.

18
4.Use and Operation Instruction of Wire Controller
Fig.11 The left-hand menu Fig.10 My Device interface Fig.12 Add Device interface
Note: The setting of "Parameter Settings"(Fig.12) is used for after-sales maintenance only.
(3) Device Management
Device management operations are as below :
Fig.7 Device selecting interface Fig.8 Bond device done interface Fig.9 Enter device's name interface