CTC Union EcoPart Pro Series Manual

Providing sustainable energy solutions worldwide
162 505 99-1 2020-09-17
Important!
• Read carefully before use, keep for future reference.
• Translation of the original instructions.
Installation and Maintenance Manual
CTC EcoPart Pro/Basic
Model i425-i435 / 425-435

1. Disconnect the cooling module’s power cable
connector and hoses.
2. Attach the two carrying handles to the bottom
of the cooling module.
3. Unscrew the cooling module’s screws. 4. Pull the cooling module by first lifting the front
edge slightly with the carrying handles.
5. Lift the cooling module using the carrying handles
and shoulder straps.
6. Lift the cooling module into the product using
the carrying handles and shoulder straps.
Remove the carrying handles and reconnect the
power cable, hoses and screws.
Removing the cooling module

162 505 99-1 2020-09-17
Installation and Maintenance Manual
CTC EcoPart Pro/Basic
Model i425-i435 / 425-435

4CTC EcoPart i425-i435 Pro
Table of Contents
Important to remember! ______________________________________________ 6
Checklist _______________________________________________________________________ 7
Safety instructions _______________________________________________________ 8
1. Introduction ___________________________________________________________ 9
2. Technical data _____________________________________________________ 10
2.1 Table 400 V 3N~ _____________________________________________ 10
2.2 Table 230 V 1N~ ______________________________________________12
2.3 Component location_________________________________________13
2.4 Dimensions diagram_________________________________________14
2.5 Refrigerant system ___________________________________________15
2.6 Operating range_______________________________________________15
3. Installation____________________________________________________________ 16
3.1 Delivery includes: ____________________________________________17
3.1.1 Non-return valve 1 ¼" ___________________________________17
3.2 Connection______________________________________________________18
3.3 Heat medium side____________________________________________ 19
3.4 Circulation pumps, heat medium side_________________20
3.4.1 Yonos Para pump curve ________________________________20
3.4.2 UPMGEO pump curve __________________________________20
3.5 Brine system ___________________________________________________ 21
3.6 Brine pump _____________________________________________________25
4. Electrical installation___________________________________________ 26
4.1 Alarm output ___________________________________________________26
4.2 Groundwater heating________________________________________ 26
5. Connecting the control system _________________________ 27
5.1 CTC EcoPart i425-i435 Pro_______________________________27
5.2 CTC EcoPart 425-435______________________________________28
5.3 Series connection of heat pumps_______________________29
5.3.1 Terminated position ______________________________________ 29
5.3.2 Shielded communication _______________________________30
5.3.3 Example of series connection ________________________31
5.4 Connecting the control system __________________________ 32
5.4.1 Define number of heat pumps________________________ 32
5.4.2 Numbering CTC EcoPartas VP2____________________32
5.4.3 Worth knowing when addressing ___________________ 34
5.4.4 Numbering CTC EcoPartas A2______________________ 35
5.5 Wiring diagram for CTC i425-i435 Pro
400V 3N~ _______________________________________________________38
5.6 Electrical diagram cooling module 400V 3N~ ______40
5.7 Electrical diagram CTC EcoPart i425-i430 Pro
230V 1N~ _______________________________________________________42
5.8 Power supply and communication 230V 1N~______ 44
5.9 Power supply and communication 400V 3N~______ 45
5.10 Electrical diagram cooling module 230V 1N~ ______46
5.11 Resistances for sensors____________________________________47
5.12 Parts list__________________________________________________________49
6. First start _____________________________________________________________ 50
7. Operation and Maintenance ______________________________ 50
7.1 Periodic maintenance _______________________________________50
7.2 Operation stop_________________________________________________ 51
7.3 Service position _______________________________________________51
8. Troubleshooting/appropriate measures ___________ 51
8.1 Air problems____________________________________________________51

5CTC EcoPart i425-i435 Pro
Congratulations on buying your new product!
The complete heat pump for rock, ground or lake
iThis manual does not describe the controls for
CTCEcoLogicL or CTCBasicDisplay; we refer you
instead to the relevant manuals for these products.
The CTC EcoPart i425-i435 is a heat pump which takes heat from rock,
ground or lake and supplies it to the existing heating circuit in the house.
The heat pump is intended for commercial use and can be connected to the
property’s heating and DHW system according to the system example in
CTCEcoLogicL.
CTC EcoPart has been designed to operate with high efficiency and low
noise levels.

6CTC EcoPart i425-i435 Pro
CTC EcoPart i425 Pro-i435 Pro
Important to remember!
Check the following points in particular at the time of delivery and installation:
• The product must be transported and stored in an upright position.
• Remove the packaging and check before installation that the product
has not been damaged in transit. Report any transport damage to the
carrier.
• Place the product on a solid foundation, preferably made of concrete.
If the product needs to be placed on a soft carpet, base plates must be
placed under the adjustable feet.
• Remember to leave a service area of at least 1 metre in front of the
product.
• The product must not be placed below floor level either.
• Avoid placing the product in rooms where the walls are of lightweight
design, as people in the adjoining room may be disturbed by noise and
vibrations.
• Ensure that pipes used between the heat pump and the heating circuit
are of adequate dimensions.
• Register the product for warranty and insurance via the website
https://ctc.se/kundservice#garantiregistrering
https://www.ctc-heating.com/customer-service#warranty-registration
No liability is accepted for any misprints. We reserve the right to make design changes.
For your own reference
Fill in the information below. It may come in useful if anything should happen.
Product: Serial number:
Installer: Name:
Date: Tel. no.:
Electrical installer: Name:
Date: Tel. no.:
When contacting CTC, always
mention the following:
• Serial number
• Model/Size
• the fault message shown in the
display
• Your telephone number
!Information in
this type of box
[!] is particularly
important for
correctly installing
and using the
product.
iInformation in this
type of box [i] is
intended to help
ensure that the
product functions
optimally.
Serial number
CTC EcoPart 425-435
The 12-digit serial
number is found on a
sticker affixed to the top
cover of the product.

7CTC EcoPart i425-i435 Pro
Checklist
The checklist must always be completed by the installation
engineer
• If a service is performed, you may be required to provide this document.
• Installation must always be done according to the installation and
maintenance instructions.
• Installation must always be carried out in a professional manner.
Following installation, the unit must be inspected and functional checks
performed as indicated below:
Pipe installation
Heat pump filled, positioned and adjusted in the correct manner according
to the instructions.
The heat pump is positioned so that it can be serviced.
Capacity of the charge/radiator pump (depending on type of system) for the
flow required.
Open radiator valves (depending on type of system) and other relevant
valves.
Tightness test.
Bleed the system.
Check proper operation of the requisite safety valves.
Requisite waste pipes connected to the floor drain (depending on type of
system).
Electrical installation
Safety switch.
Correct and taut wiring.
Requisite sensors fitted.
Accessories.
Customer information (adapted to the relevant installation)
Start-up with customer/installer.
Menus/controls for selected system.
Installation and Maintenance Manual handed over to the customer.
Check and filling, heating circuit.
Information on fine adjustments.
Alarm information.
Functional test of safety valves fitted.
Register your Installation Certificate at ctc-heating.com.
Information on fault reporting procedures.
____________________________________________ _______________________________________________
Date/Customer Date/Installer

8CTC EcoPart i425-i435 Pro
Turn off the power with an omnipolar switch before doing any work on the product.
The product must be connected to protective earth.
The product is classified as IPX1. The product must not be rinsed with water.
When handling the product with a hoist ring or similar device, make sure that the
lifting equipment, eyebolts and other parts are not damaged. Never stand under the
hoisted product.
Never jeopardise safety by removing bolted covers, hoods or similar.
Any work on the product’s cooling system should be carried out by authorised
personnel only.
The product’s electrical systems should only be installed and serviced by a qualified
electrician.
-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.
Safety valve check:
-Safety valve for boiler/system to be checked regularly.
The product must not be started if it is not filled with water; instructions are in the
“Pipe installation” section.
WARNING: Do not switch on the product if there is a possibility that the water in the
heater is frozen.
This device can be used by children from the age of eight years and above and by
people with reduced physical, sensory or mental ability or lack of experience or
knowledge if they have been taught, either with supervision or with the instructions
provided, how to use the device safely and understand the risks involved. Children
should not play with the device. Cleaning and maintenance should not be carried
out by children without supervision.
If these instructions are not followed when installing, operating and maintaining the
system, Enertech’s commitment under the applicable warranty terms is not binding.
Safety instructions

9CTC EcoPart i425-i435 Pro
1 x 230V 1N~
CTC EcoPart 425 &
CTCEcoParti425Pro
CTC EcoPart 430 &
CTCEcoParti430Pro
14 kW10 kW
14 kW 14 kW
3 x 400V 3N~
CTC EcoPart 425 &
CTCEcoParti425Pro
CTC EcoPart 430 &
CTCEcoParti430Pro
CTC EcoPart 435 &
CTCEcoParti435Pro
12 kW8 kW 17 kW
17 kW 17 kW 17 kW
1. Introduction
This heat pump is available in many different versions depending on how you
intend to control it.
• The CTC EcoPart i425-i435 Pro has an integrated CTC EcoLogic M/L
unit that controls the heat pumps and the property’s heating circuit.
• The CTC EcoPart 425-435 has two CTC Basic Display units as
standard.
The heat pump consists of two heat pump modules on top of each other.
The structure of the different sizes is shown below.

10 CTC EcoPart i425-i435 Pro
400V 3N~
CTC EcoPart i425 Pro CTC EcoPart i430 Pro
KM417EP 2xLEP KM408EP 2xLEP KM417EP 2xLEP KM412EP 2xLEP
CTC EcoLogic Pro CTC EcoLogic Pro
kW 15.4 17.0
A 22.2 24.6
IPX1 IPX1
A 16.7 19.7
A 11.5 5.2 11.5 8.2
CTC EcoPart 425 CTC EcoPart 430
KM417EP 2xLEP KM408EP 2xLEP KM417EP 2xLEP KM412EP 2xLEP
CTC Basic display CTC Basic display
kW 10.8 12.4
A 21,1 23,5
IPX1 IPX1
A 16.7 19.7
A 11.5 5.2 11.5 8.2
A 32.0 17.7 32.0 23.5
400V 3N~
kW 20.89 23.93
kW 14.05 6.84 14.05 9.88
COP 1) @ -5/45 3.19 3.34 3.19 3.30
kW 16.24 | 16.14 |15.87 8.19 | 7.87 | 7.55 16.24 | 16.14 | 15.87 11.75 | 11.24 | 10.97
COP 1) @ 0/35 0/45 0/55 4.36 | 3.61 | 3.07 4.58 | 3.64 | 2.99 4.36 | 3.61 | 3.07 4.60 | 3.66 | 2.96
kW 19.25 | 18.42 | 18.16 9.44 | 9.05 | 8.65 19.25 | 18.42 | 18.16 13.53 | 12.95 | 12.57
COP 1) @ 5/35 5/45 5/55 5.02 | 4.05 | 3.38 5.02 | 4.04 | 3.30 5.02 | 4.05 | 3.38 5.11 | 4.11 | 3.35
400V 3N~
l 4.07 2.90 4.07 3.40
ºC -5 / 20
bar 3.0 3.0
l/s 0.63 0.31 0.63 0.44
l/s 1.05 0.51 1.05 0.73
8.9 5.8 8.9 7.2
400V 3N~
kg 2.7 1.9 2.7 2.3
ton 4.790 3.371 4.790 4.080
Polyolester (POE)
MPa 3.1 (31 bar)
dB(A) 45,6 45,4
kg 334 354
mm 596 x 680 x 1760
Heat pump Keymark Cert. NO. 012-068 012-071
400V 3N~
ºC 110
l/s 0.40 0.20 0.40 0.28
5.9 (6 kPa) 4.1 (3 kPa) 5.9 (6 kPa) 5.5 (3.5 kPa)
l/s 0.81 0.39 0.81 0.56
LEP (Low Energy Pump)
Electrical data
Name
Type
Operating system
Rated power
Rated current
IP class
Max. operating current Compressors
Max. operating current Compressor
Name
Type
Operating system
Rated power
Rated current
Protection class IP
Max. operating current Compressors
Max. operating current Compressor
Max starting current
Operational data for heat pump
Output from compressor 1) @ -5/45
Output from compressor 1) @ -5/45
Output from compressor 1) @ 0/35 0/45 0/55
Output from compressor 1) @ 5/35 5/45 5/55
1) EN14511:2007, inclusive circulation pumps
Brine system
Water volume (V)
Brine system min/max temp. (TS)
Brine system max pressure (PS)
Brine system min flow ∆t = 5 K
Brine system nominal flow ∆t = 3 K
Kvs value ∆t = 3 K at nominal flow
Brine system pump Class A circulation pump (LEP)
Pump capacity See diagram in the Pipe installation chapter
Other data
Refrigerant quantity (R407C, fluorinated
greenhouse gases GWP 1774)
CO2equivalent
Compressor oil
Pressure switch cut-off HT
Sound power LWA (EN 12102)
Weight net
Width x Depth x Height
Heating system
Max temperature heating medium (TS)
Heating system min flow 2)
Kvs value ∆t = 10 K, at min flow
Heating system nominal flow 3)
Heating medium pump
2) ∆t = 10 K och 0/35 °C heat pump operation.
3) ∆t = 5 K och 0/35 °C heat pump operation.
No annual leakage control of the refrigerant is required
2. Technical data
2.1 Table 400 V 3N~

11CTC EcoPart i425-i435 Pro
400V 3N~
CTC EcoPart i435 Pro
KM417EP 2xLEP KM417EP 2xLEP
CTC EcoLogic Pro
kW 19.4
A 28,9
IPX1
A 23.0
A 11.5 11.5
CTC EcoPart 435
KM417EP 2xLEP KM417EP 2xLEP
CTC Basic display
kW 14.8
A 27,8
IPX1
A 23.0
A 11.5 11.5
A 32.0 32.0
400V 3N~
kW 14.05 14.05
COP 1) @ -5/45 3.19 3.19
kW 16.24 | 16.14 |15.87 16.24 | 16.14 |15.87
COP 1) @ 0/35 0/45 0/55 4.36 | 3.61 | 3.07 4.36 | 3.61 | 3.07
kW 19.25 | 18.42 | 18.16 19.25 | 18.42 | 18.16
COP 1) @ 5/35 5/45 5/55 5.02 | 4.05 | 3.38 5.02 | 4.05 | 3.38
400V 3N~
l 4.07 4.07
ºC -5 / 20
bar 3.0
l/s 0.63 0.63
l/s 1.05 1.05
8.9 8.9
400V 3N~
kg 2,7 2,7
ton 4.790 4.790
Polyolester (POE)
MPa 3.1 (31 bar)
dB(A) 45.6
kg 359
mm 596 x 680 x 1760
Heat pump Keymark Cert. NO. 012-072
400V 3N~
ºC 110
l/s 0.40 0.40
5.9 (6 kPa) 5.9 (6 kPa)
l/s 0.81 0.81
LEP (Low Energy Pump)
Electrical data
Name
Type
Operating system
Rated power
Rated current
IP class
Max. operating current Compressors
Max. operating current Compressor
Name
Type
Operating system
Rated power
Rated current
Protection class IP
Max. operating current Compressors
Max. operating current Compressor
Max starting current
Operational data for heat pump
Output from compressor 1) @ -5/45
Output from compressor 1) @ 0/35 0/45 0/55
Output from compressor 1) @ 5/35 5/45 5/55
1) EN14511:2007, inclusive circulation pumps
Brine system
Water volume (V)
Brine system min/max temp. (TS)
Brine system max pressure (PS)
Brine system min flow ∆t = 5 K
Brine system nominal flow ∆t = 3 K
Kvs value ∆t = 3 K at nominal flow
Brine system pump Class A circulation pump (LEP)
Pump capacity See diagram in the Pipe installation chapter
Other data
Refrigerant quantity (R407C, fluorinated
greenhouse gases GWP 1774)
CO2equivalent
Compressor oil
Pressure switch cut-off HT
Sound power LWA (EN 12102)
Weight net
Width x Depth x Height
Heating system
Max temperature heating medium (TS)
Heating system min flow 2)
Kvs value ∆t = 10 K, at min flow
Heating system nominal flow 3)
Heating medium pump
2) ∆t = 10 K och 0/35 °C heat pump operation.
3) ∆t = 5 K och 0/35 °C heat pump operation.
No annual leakage control of the refrigerant is required

12 CTC EcoPart i425-i435 Pro
230V 1N~
CTC EcoPart i425 Pro CTC EcoPart i430 Pro
KM414EP 2xLEP KM410EP 2xLEP KM14EP 2xLEP KM414EP 2xLEP
CTC EcoLogic Pro CTC EcoLogic Pro
kW 15.3 17.2
A 33.5 38.0
IPX1 IPX1
A 47.7 54.2
A 27.1 20.6 27.1 27.1
CTC EcoPart 425 CTC EcoPart 430
KM414EP 2xLEP KM410EP 2xLEP KM414EP 2xLEP KM414EP 2xLEP
CTC Basic display CTC Basic display
kW 10.7 12.6
A 24.0 28.0
IPX1 IPX1
A 47.7 54.2
A 27.1 20.6 27.1 27.1
A 30.0 30.0 30.0 30.0
230V 1N~
kW 12.09 8.33 12.09 12.09
COP 1) @ -5/45 3.24 3.30 3.24 3.24
kW 14.47 | 13.93 |13.40 9.97 | 9.55 | 9.28 14.47 | 13.93 |13.40 14.47 | 13.93 |13.40
COP 1) @ 0/35 0/45 0/55 4.54 | 3.64 | 2.95 4.60 | 3.68 | 2.98 4.54 | 3.64 | 2.95 4.54 | 3.64 | 2.95
kW 16.48 | 15.98 | 15.28 11.42 | 10.99 | 10.58 16.48 | 15.98 | 15.28 16.48 | 15.98 | 15.28
COP 1) @ 5/35 5/45 5/55 5.13 | 4.11 | 3.28 5.20 | 4.16 | 3.28 5.13 | 4.11 | 3.28 5.13 | 4.11 | 3.28
230V 1N~
l 4.07 2.90 4.07 4.07
ºC -5 / 20
bar 3.0 3.0
l/s 0.53 0.38 0.53 0.53
l/s 0.88 0.64 0.88 0.88
8.7 8.1 8.7 8.7
230V 1N~
kg 2.7 1.9 2.7 2.7
4.790 3.371 4.790 4.790
Polyolester (POE)
MPa 3.1 (31 bar)
dB(A) 45.6 45.4
kg 334 354
mm 596 x 680 x 1760
Heat pump Keymark Cert. NO. 012-068 012-071
230V 1N~
ºC 110
l/s 0.34 0.24 0.34 0.34
8.6 4.3 8.6 8.6
l/s 0.68 0.48 0.68 0.68
LEP (Low Energy Pump)
Electrical data
Name
Type
Operating system
Rated power
Rated current
IP class
Max. operating current Compressors
Max. operating current Compressor
Name
Type
Operating system
Rated power
Rated current
Protection class IP
Max. operating current Compressors
Max. operating current Compressor
Max starting current
Operational data for heat pump
Output from compressor 1) @ -5/45
Output from compressor 1) @ 0/35 0/45 0/55
Output from compressor 1) @ 5/35 5/45 5/55
1) EN14511:2007, inclusive circulation pumps
Brine system
Water volume (V)
Brine system min/max temp. (TS)
Brine system max pressure (PS)
Brine system min flow ∆t = 5 K
Brine system nominal flow ∆t = 3 K
Kvs value ∆t = 3 K at nominal flow
Brine system pump Class A circulation pump (LEP)
Pump capacity See diagram in the Pipe installation chapter
Other data
Refrigerant quantity (R407C, fluorinated
greenhouse gases GWP 1774)
CO2equivalent
Compressor oil
Pressure switch cut-off HT
Sound power LWA (EN 12102)
Weight net
Width x Depth x Height
Heating system
Max temperature heating medium (TS)
Heating system min flow 2)
Kvs value ∆t = 10 K, at min flow
Heating system nominal flow 3)
Heating medium pump
2) ∆t = 10 K och 0/35 °C heat pump operation.
3) ∆t = 5 K och 0/35 °C heat pump operation.
No annual leakage control of the refrigerant is required
2.2 Table 230 V 1N~

13CTC EcoPart i425-i435 Pro
5
6
7
8
9
11
10
15
14
16
17
13
19
18
20
22
21
4
3
2
26252423
112
27
1. Conduit for mains cable
(concealed)
2. Terminal board
3. Condenser
4. Evaporator
5. High pressure switch
6. Compressor
7. Discharge sensor
8. Service socket
9. Low energy heat medium pump
10. Condenser sensor in
11. Drain valve warm side/Water
12. Conduit for communication
(concealed)
13. CTC Basic Display
(only CTC EcoPart standard
version)
14. High pressure sensor
15. Drying filter
16. Low energy brine pump
17. Low pressure sensor
18. Brine sensor out
19. Expansion valve
20. Drain valve cold side/Brine
21. Condenser sensor out
22. Brine sensor in
23. Heat medium in Ø28 (to HP)
24. Heat medium out Ø28 (from HP)
25. Brine out Ø28 mm (to rock)
26. Brine in Ø28 mm (from rock)
27. Adjustable feet
2.3 Component location

14 CTC EcoPart i425-i435 Pro
559
1758
628
1329
47
39 517
675
20 (12-47)
141
70
93
596
0 163 243
0 163 243
80
80
164 164
0
88
138
188
428
1931
694
781
Erforlig reshöjd 1855mm
E
art. nr
Utgåva
Ämnes nr
Ersätter
art. nr
Ersättes av
Grupp
Produkt
Reg. nr
Benämning
Tol.system
Kontr.
Normgr.
Skala
Ritad
Material
Datum
Sign.
Distr till/Antal
Ytjämnhet RA
Godk. prod
Om ej annat angives gäller ovanstående
Denna ritning är Enertech AB's egendom. Den får ej användas till skada för företagets intressen.
Diese Zeichnung ist das Eigentum der Enertech AB und darf nicht zum Scha- den dieser Gesellschaft verwendet werden.
This drawing is the property of Enertech AB and is not to be used against the interest of this com- pany
1:20
DP
2014-09-16
CTC EcoPart 425-435
Värmepumpar
EcoPart
8587000
Reservdelsstruktur: 586767-002
TA
blad 8/8
2.4 Dimensions diagram
!Remember to leave a service
area of at least 1 metre in front of
the product.

15CTC EcoPart i425-i435 Pro
1 3 24
5
8
6
7
9 10 11
12 13
1514
16
17
1. Brine (heat source)
2. Water
3. Evaporator
4. Condenser
5. Compressor
6. Expansion valve (electronic)
7. Drying filter
8. Refrigerant heat exchanger
9. Low pressure sensor
10. High pressure sensor
11. High pressure switch
12. Temperature suction gas
13. Temperature discharge
14. Temperature brine
15. Temperature water out
16. Temperature water in
17. Control expansion valve
2.5 Refrigerant system
The schematic diagram shows the refrigerant system for each integrated
heat pump module.
2.6 Operating range
CTC EcoPart’s pressure-controlled operations monitoring means that the
brine temperature (B) and heat medium temperature (H) can automatically be
increased where this is possible.
Operating condition: B temp/H temp °C
1 -5 / 25
2 20 / 25
3 -5 / 61
4 20 / 64
Operating limits as per the table above are defined in accordance with EN 14511-4.

16 CTC EcoPart i425-i435 Pro
3. Installation
This section is aimed at anyone responsible for one or more of the
installations required to ensure that the product works the way the property
owner wants.
Take your time going through functions and settings with the property owner
and answer any questions. Both you and the heat pump benefit from a user
who has completely understood how the system operates and should be
maintained.
The installation must be carried out in accordance with current standards
and regulations. Refer to MIS 3005 and associated building regulations Part
L, F & G. The product must be connected to an expansion vessel in an open
or closed system. Do not forget to flush the heating circuit clean before
connection. Apply all the installation settings based on the description in the
chapter on “First start”.
The heat pump operates with a primary flow/return temperature across the
condenser of up to 65/58°C.
Transportation
Transport the unit to the installation site before removing the packaging.
Handle the product in the following manner:
• Forklift
• Lifting band around the pallet. NB: Can only be used with the
packaging on.
Unpacking
Unpack the heat pump when it is placed next to its installation site. Check
that the product has not been damaged in transit. Report any transport
damage to the carrier. Also check that the delivery is complete according to
the list below.
!The product must
be transported and
stored in an upright
position.

17CTC EcoPart i425-i435 Pro
3.1 Delivery includes:
Feed cables:
3x400 = 1 pcs
1x230 = 2 pcs
CTC EcoPart i425-i435 Pro (with CTC EcoLogic L):
• 1 x Safety valve ½" 3 bar
• 1 x Room sensor
• 3 x 22K sensor L=2,500 mm
• 1 x Outdoor sensor
• 4 x Non-return valve 1¼"
• 4 x Dirt filter 1¼"
• 4 x Rubber grommet D=60
• 4 x Edge moulding 186 mm
• 2 x Edge moulding 700 mm
• CTC EcoLogic M/L
CTC EcoPart 425-435 (with two CTC Basic Display units):
• 1 x Safety valve ½" 3 bar
• 4 x Non-return valve 1¼"
• 4 x Dirt filter 1¼"
• 4 x Rubber grommet D=60
• 4 x Edge moulding 186 mm
• 2 x Edge moulding 700 mm
• CTC Basic Display manual
3.1.1 Non-return valve 1 ¼"
Flow direction
Flow direction
Flow direction

18 CTC EcoPart i425-i435 Pro
!When a collector is connected,
the opening must be lined with the
edge moulding provided to prevent
abrasion of the hose.
3.2 Connection
Connection can be made to the right, left or top or rear of the heat pump.
Cut away the cover plate on the side where the hoses are to be connected.
When the opening has been made through the cover plate, carry out the
installation as follows:
1. In order to protect the hoses, fasten the protective edging provided
around the edge of the opening in the insulation plate. Adjust the length
of the protective edging to suit the opening as required.
2. Pass the hoses through the opening in the side cover plates and
connect them. Ensure that the insulation covers all parts of the brine
connection to prevent ice and condensation forming.
3. Then install the collector system.
You can also connect the primary flow on one side and the return on the
other. See the section entitled "Measurement details for measurements and
dimensions". The pipe between the heat pump and brine loop should not be
less than Ø35 mm in dimension.

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!It is very important that
the branch pipes are
the same design so
that as equal a pressure
drop as possible is
achieved in both the
sets of pipes (pipe
dimensions, bends,
etc.).
3.3 Heat medium side
Connect the heat pump with a dimension of at least Ø35 mm so it can then
be joined to a collecting pipe. The non-return valve and dirt filter are 1¼".
The dimension of the collecting pipe depends on the installation.
Route the pipes so that no other highest point is present where air can
collect and obstruct circulation. If however this cannot be done, provide this
highest point with an automatic bleeder.
NB: Only one heat pump/cooling module can be connected to the diverting
valve assembly accessory.
Branch pipe min
Ø35 mm
Connection point Ø28 mm
Branch pipe,
primary flow
Collecting pipe,
return
Primary flow, heat medium side
Primary flow, heat medium side
Return flow, heat medium side
Return flow, heat medium side
Heat pump 1
Heat pump 2
Dirt filter
Control valve
Non return valve
Shut-off valve

20 CTC EcoPart i425-i435 Pro
WILO
Tolerances of each curve according to EN 1151-1:2006
3.4 Circulation pumps, heat medium side
The heat pump is supplied with two LEPs (Low Energy Pump), which are low energy
charge pumps installed at the factory.
3.4.1 Yonos Para pump curve
3.4.2 UPMGEO pump curve
Circulation pump 8 kW Yonos Para PWM 7.0 Prod. no. 587477 303
Circulation pump 10-12 kW Yonos Para PWM 7.5 Prod. no. 587477 302
Circulation pump 14-17 KW UPMGEO 25-85 130 Prod. no. 587477 301