Regulus CTC EcoPart 400 Manual

Regulus CTC EcoPart 400 Heat Pump
Models 406-417 | 400 VAC 3 phase
Installation and Maintenance Manual

2CTC EcoPart 400
General information
Table of Contents
Important to remember ____________________________________________ 4
Safety Instructions! __________________________________________________ 4
1. Connection alternatives CTC EcoPart 400__________ 5
1.1 General _____________________________________________________ 5
2. Technical data___________________________________________________ 6
2.1 Table 400 VAC 3 phase_________________________________ 6
2.2 Component location _____________________________________ 8
2.3 Dimensional drawing ____________________________________ 8
2.4 Operating range __________________________________________ 9
2.5 Refrigerant system_______________________________________ 9
3. Operation and Maintenance_____________________________ 10
3.1 Periodic maintenance __________________________________10
3.2 Shut-off ____________________________________________________10
4. Troubleshooting/measures_______________________________ 10
4.1 Air problems ______________________________________________10
4.2 Alarms _____________________________________________________10
5. Installation ______________________________________________________ 11
5.1 Heating medium side connection ___________________12
5.1.1 Circulation pump _____________________________________12
5.2 Connecting the brine system _________________________13
5.3 Pump curves _____________________________________________16
5.3.1 Standard brine pump________________________________16
5.3.2 High efficiency brine pump ________________________16
6. Electrical installation________________________________________ 18
6.1 Series connection of heat pumps ___________________18
6.1.1 Shielded communication ___________________________18
6.1.2 Terminated position__________________________________19
6.2 Output relay for joint alarms __________________________19
6.3 CTC Basic display (accessory) ______________________19
6.3.1 Connection ____________________________________________19
6.4 Electrical installation 400 VAC 3 phase ___________20
6.5 Wiring diagram 400 VAC 3 phase___________________21
6.5.1 CTC EcoPart 406-412 ______________________________21
6.5.2 CTC EcoPart 414-417 ______________________________22
7. Wiring a controller ___________________________________________ 23
7.1 Wiring alternative 1 _____________________________________23
7.2 Wiring alternative 2 _____________________________________24
8. First start ________________________________________________________ 24
EC Declaration of Conformity _________________________________ 25

3CTC EcoPart 400
General information
Congratulations on buying your new
EcoPart 400 Heat Pump
The complete heat pump for bedrock, ground or
lake heat sources
The CTC EcoPart 400 is a heat pump that takes heat from bedrock,
ground or lake heat sources and supplies it to the existing heating system
in the house.
The CTC EcoPart 400 is designed to operate with high efficiency and
a low noise level.
Keep this manual containing the installation and maintenance instructions.
If the heat pump is properly maintained, you will be able to enjoy using
your CTC EcoPart 400 for many years. This manual will provide all the
information you will need.

4CTC EcoPart 400
General information
Important to remember!
Check the following points in particular at the time of delivery and
installation:
• The CTC EcoPart must be transported and stored in an upright
position. For transport into a house it may be laid on its back for
a short time.
• 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 firm surface, preferably made of concrete.
Should the product be standing on a soft carpet, a rigid board must
be placed under the adjustable feet.
• Remember to leave a service area of at least 1 m in front of the
product. The product must not be placed below floor level either.
• Avoid placing the product in rooms with thin walls, as people in the
adjoining room may be disturbed by the compressor and vibrations.
• Ensure that pipes used between the heat pump and the heating
system are of adequate dimensions.
• Ensure that the circulation pump has sufficient capacity.
Safety Instructions
The following safety instructions must be observed when handling,
installing and using the heat pump:
• Turn off the safety (power) switch before doing any work on the
product.
• Prior to filling the system with the recommended antifreeze fluid, the
system should be flushed thoroughly with antifreeze fluid.
• When handling the product with a hoist ring or similar device, make
sure that the lifting equipment, eyebolts etc. are not damaged. Never
stand under the hoisted product.
• Never jeopardize safety by removing bolted covers, hoods or similar.
• Never jeopardize safety by deactivating safety equipment.
• Any work done on the product’s electric or cooling system should be
done by a competent engineer.
• This product is intended exclusively for indoor installation.
!Failure to follow the instructions in this Manual may void the Warranty.

5CTC EcoPart 400
General information
1. Connection alternatives
CTC EcoPart 400
CTC EcoPart 400
1.1 General
The illustration below shows connection alternatives available for the CTC
EcoPart 400. In some cases, a CTC Basic display may be needed. See
the chapter on Wiring a controller.
Alternative A
CTC EcoPart 400 can be connected to the products below:
IR 12 CTC 400
Alternative B
The CTC EcoPart 400 can be operated with an existing boiler via the
CTC Basic Display accessory. This can be done with a fixed temperature
or based on thermostatic control. Given that the standard version of the
CTC EcoPart 400 does not have its own controller, the CTC Basic Display
accessory is required.

6CTC EcoPart 400
General information
2. Technical data
2.1 Table 400 VAC 3 phase
Electrical data EcoPart 406 EcoPart 408 EcoPart 410 EcoPart 412
Rated power kW 2.7 3.5 4.2 5.1
Rated current A 5.8 6.5 8.1 9.6
IP protection IPX1
Other data EcoPart 406 EcoPart 408 EcoPart 410 EcoPart 412
Refrigerant quantity (R407C) kg 2,1 2,1 2,1 2,5
Compressor oil FV50S Polyolester (POE)
Interrupt value switch HP MPa 3,1 (31 bar)
Weight kg 138 143 148 164
Width x Height x Depth mm 600 x 760 x 672
Brine system EcoPart 406 EcoPart 408 EcoPart 410 EcoPart 412
Fluid volume l 2.3 2.9 2.9 3.4
Brine system min./max. temp. °C -5/20
Brine system min./max. pressure bar 0.2/3.0
Brine system min. flow, Δt=5 K l/s 0.22 0.31 0.38 0.44
Brine system nominal flow, Δt=3 K l/s 0.37 0.51 0.64 0.73
Brine system pump, standard TOP-S 25/7 TOP-S 25/10
Brine system pump speed adjustment 3
Brine system high efficiency pump Wilo Stratos Para 25/8 Wilo Stratos
Para 25/12
Brine system high efficiency pump speed
Pump capacity
Heating system EcoPart 406 EcoPart 408 EcoPart 410 EcoPart 412
Heating medium min. flow 2) l/s 0.14 0.20 0.24 0.28
Heating medium nominal flow 3) l/s 0.28 0.39 0.48 0.56
Operational data for heat pump EcoPart 406 EcoPart 408 EcoPart 410 EcoPart 412
Output from compressor 1) @ -5/45 kW 4.68 6.84 8.33 9.88
COP 1) @ -5/45 - 3.09 3.34 3.30 3.30
Output from compressor 1) @ 0/35 | 0/45
0/55
kW 5.90 | 5.48 5.17 8.19 | 7.87 7.55 9.97 | 9.55 9.28 11.75 | 11.24
10.97
COP 1) @ 0/35 | 0/45
0/55
- 4.57 | 3.54 2.76 4.58 | 3.64 2.99 4.60 | 3.68 2.98 4.60 | 3.66 2.96
Output from compressor 1) @ 5/35 | 5/45
5/55
kW 6.81 | 6.49 6.08 9.44 | 9.05 8.65 11.42 | 10.99
10.58
13.53 | 12.95
12.57
COP 1) @ 5/35 | 5/45
5/55
- 5.24 | 4.15 3.18 5.02 | 4.04 3.30 5.20 | 4.16 3.28 5.11 | 4.11 3.35
Max. operating current Compressor A 4.5 5.2 6.8 8.2
Sound power according to EN12102 dB(A) 43.0 42.5 48.5 50.3
1) EN14511:2007, incl.:
heating medium pump (EP406/408 - Stratos Tec 25/6 and EP410/412 - Stratos Tec 25/7)
brine system pump (EP406/410 - Wilo Stratos Para 25/8 and EP412 - Wilo Stratos Para 25/12)
2) At Δt = 10 K and 0/35 °C heat pump operation
3) At Δt = 5 K and 0/35 °C heat pump operation

7CTC EcoPart 400
General information
1) EN14511:2007, incl.:
heating medium pump (EP406/408 - Stratos Tec 25/6 and EP410/412 - Stratos Tec 25/7)
brine system pump (EP406/410 - Wilo Stratos Para 25/8 and EP412 - Wilo Stratos Para 25/12)
2) At Δt = 10 K and 0/35 °C heat pump operation
3) At Δt = 5 K and 0/35 °C heat pump operation
Electrical data EcoPart 414 EcoPart 417
Rated power kW 6.0 7.4
Rated current A 12.2 13.9
IP protection IPX1
Other data EcoPart 414 EcoPart 417
Refrigerant quantity (R407C) kg 2,9 2,9
Compressor oil Polyolester (POE)
Interrupt value switch HP MPa 3,1 (31 bar)
Weight kg 164 164
Width x Height x Depth mm 600 x 760 x 672
Brine system EcoPart 414 EcoPart 417
Fluid volume l 4.07 4.07
Brine system min./max. temp. °C -5/20
Brine system min./max. pressure bar 0.2/3.0
Brine system min. flow, Δt=5 K l/s 0.53 0.63
Brine system nominal flow, Δt=3 K l/s 0.88 1.05
Brine system pump, standard TOP-S 25/10
Brine system pump speed adjustment 3
Brine system high efficiency pump Wilo Stratos Para 25/12
Brine system high efficiency pump speed
Pump capacity
Heating system EcoPart 414 EcoPart 417
Heating medium min. flow 2) l/s 0.34 0.40
Heating medium nominal flow 3) l/s 0.68 0.81
Operational data for heat pump EcoPart 414 EcoPart 417
Output from compressor 1) @ -5/45 kW 12.09 14.05
COP 1) @ -5/45 - 3.24 3.19
Output from compressor 1) @ 0/35 | 0/45
0/55
kW 14.47 | 13.93
13.40
16.76 | 16.14
15.87
COP 1) @ 0/35 | 0/45
0/55
- 4.54 | 3.64
2.95
4.52 | 3.61
3.07
Output from compressor 1) @ 5/35 | 5/45
5/55
kW 16.48 | 15.98
15.28
19.25 | 18.42
18.16
COP 1) @ 5/35 | 5/45
5/55
- 5.13 | 4.11
3.28
5.02 | 4.05
3.38
Max. operating current Compressor A 9.14 11.5
Sound power according to EN12102 dB(A) 53.0 55.5

8CTC EcoPart 400
General information
1. Compressor
2. Evaporator
3. Condenser
4. Drying filter
5. Expansion valve
6. High pressure switch
7. Terminal box
8. High pressure sensor
9. Low pressure sensor
10. Drain valve cold side/Brine
11. Drain valve hot side/Heating water
12. Adapter 130 - 6/4”
13. Circulation pump cold side
14. Adjustable feet
15. Communication cable grommet
16. Power supply grommet
17. Brine in Ø28 mm (from bedrock)
18. Brine out Ø28 mm (to bedrock)
19. Heating fluid out Ø 22 mm (EcoPart 406-41
Heating fluid out Ø 28 mm (EcoPart 414-417)
20. Heating fluid in Ø 22 mm (EcoPart 406-412)
Heating fluid in Ø 28 mm (EcoPart 414-417)
21. Hot gas sensor
22. Brine sensor in
23. Brine sensor out
24. Heating system return sensor
25. Heating system flow sensor
26. Service outlets
1
7
16
6
21
8
24
14
22
325 215
4
5
9
23
13
17181920
10
11
2.2 Component location
2.3 Dimensional drawing

 

   

    

   

12
26

9CTC EcoPart 400
General information
13 24
5
8
6
7
91011
12 13
1514
16
17
1. Brine (heat source)
2. Heating system
3. Evaporator
4. Condenser
5. Compressor
6. Expansion valve (electronic)
7. Drying filter
8. Refrigerant exchanger
9. Low pressure sensor
10. High pressure sensor
11. High pressure switch
12. Suction gas temperature
13. Hot gas temperature
14. Brine temperature
15. HP Flow temperature
16. HP Return temperature
17. Expansion valve control
2.4 Operating range
Flow temperature ºC
Brine out temp. ºC
2.5 Refrigerant system

10 CTC EcoPart 400
General information
3. Operation and Maintenance
4. Troubleshooting/measures
The EcoPart Heat Pump is designed to provide reliable operation and high
levels of comfort, and to have a long service life. Various tips are given
below which may be helpful and guide you in the event of an operational
malfunction.
If a fault occurs, you should always contact the installer who installed your
unit. If the installer believes the malfunction is due to a material or design
fault, then they will contact the supplier to check and rectify the issue.
Always provide the product’s serial number.
4.1 Air problems
If you hear a rasping sound from the heat pump, check that it is properly
bled. Top up with water where required, so that the correct pressure is
achieved. If this noise recurs, call a technician to check the cause.
4.2 Alarms
Any alarms and information texts from the CTC EcoPart 400 are displayed
in the product which is used to control it; you should therefore consult the
manual for that controller.
When the installer has installed your new heat pump, you should check
together that the system is in perfect operating condition. Let the installer
show you where the power switches, controls and fuses are so that you
know how the system works and how it should be maintained. Bleed
the radiators (depending on type of system) after around three days of
operation and top up with water if required.
3.1 Periodic maintenance
After three weeks’ operation and then every three months during the first
year. Then once a year:
• Check that the installation is free of leaks.
• Check that the product and the system are free of air; air bleed if
necessary, see the section Connecting the brine system.
• Check that the brine system is still pressurised and the fluid level in
the brine vessel is adequate.
3.2 Shut-down
The heat pump is shut down using the operating switch. If there is a risk of
the water freezing, all the water shall be drained out from the heat pump!

11CTC EcoPart 400
General information
5. Installation
This chapter is aimed at anyone responsible for 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 valid rules. The
product must be connected to an expansion vessel in an open or closed
system. Do not forget to flush the radiator system clean before connection.
Apply all the installation settings based on the description in the chapter 8
called First start.
The heat pump operates with a primary flow temperature of up to 65 °C
and return temperature of up to 58 °C.
Transport
Transport the unit to the installation site before removing the packaging.
Handle the product in the following manner:
• Forklift
• Lifting band around the pallet. Note: 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.
Scope of delivery
• EcoPart 400 Heat Pump
• safety valve ½“, 3 bar
• filling kit 520-G25
• antifreeze fluid buffer tank
• rubber grommet, diam. 60
• 2 edge mouldings, 186 mm long
• circulation pump incl. nipples
!The product must be
transported and stored
in an upright position.

12 CTC EcoPart 400
General information
5.1 Heating medium side connection
The heat pump is connected with at least Ø22 mm pipes to both flow and
return. For EcoPart 414-417 the diameter shall be 28 mm min. Route the
pipes so that there is no other highest point where air can accumulate and
prevent circulation. If this is unavoidable, provide this highest point with an
automatic air vent valve.
5.1.1 Circulation pump
The selection of circulation pump depends on the type of the heating
system. To ensure proper operation, the flow in the heating circuit should
not be lower than the values in the table under Technical data. Ensure that
the circulation pump fitted is large enough, so that there is sufficient flow
through the heat pump. If the flow is too low, there is a risk that the high
pressure switch will be triggered.
IR12 CTC 400, or IR 10 CTC 400
Up to 10 heat pumps can be connected to an IR12 CTC 400 or IR10 CTC
400 controller. The circulation pump in heat pump 1 can be then
connected to the IR12 CTC 400 or IR10 CTC 400 controller. The
circulation pumps for heat pumps 2-10 are switched directly by the control
unit of the respective heat pump.
Standalone operation
The charge pump is connected to the CTC EcoPart 400 and controlled
using the CTC Basic Display.

13CTC EcoPart 400
General information
5.2 Connecting the brine system
The installation and connection of the brine system, i.e. collector to
bedrock or ground, shall be carried out by a qualified professional in
accordance with current regulations.
Take all precautions to ensure that no debris gets into the collector hoses,
which must be flushed clean before being connected. The cover plugs
should remain in place as long as possible during any work.
The temperature of the brine system can fall below 0°C. This is why it is
important not to use water-based lubricants etc. during installation. It is
also important for all parts to be insulated against condensation to prevent
ice forming.
Connection
Bedrock connection can be on the right, left or top of the heat pump. Cut
away the cover plate on the side where the hoses are to be connected.
Outlined circles are formed on the insulation on the inner side of the panel
enabling to cut out openings for bedrock pipes. When a hole has been
made in the side panel, carry out the installation as follows:
1. Place the protective edging provided around the edge of the hole in the
insulation plate in order to protect the hoses. If necessary, adjust the
length of the edging so that it fits in the hole.
2. Pass the hoses through the hole in the side cover plate and connect
them. Ensure that the insulation covers all parts of the brine connection
to prevent ice and condensation forming.
3. Then connect the collector system as shown below.
It is also possible to connect the flow on one side and the return on the
other. See Dimensional drawing for measurements and dimensions. The
dimension of the pipe between the heat pump and brine loop should not
be less than Ø28 mm.
!We recommend
that you follow the
installation instructions
from the local heat
pump association.

14 CTC EcoPart 400
General information
105
103
104
98d
100
101
102
99
97
96
98c
98a
cTc
98b
96 Level/expansion vessel
97 Filling kit
98 Shut-off valve
99 Dirt filter
100 3-way valve
101 External filling pump
102 Blending vessel
103 Brine circuit pump
104 Evaporator
105 3 bar safety valve
Diagram
The filling pump connection is marked with dashed line. Note: The ground
collector piping shall be fitted with an air vent valve since air pockets can
form inside. When filling and air bleeding the ground collector, always check
the dirt filter (99) as well.
!The filling vessel and
pump shall be adequa-
tely sized.

15CTC EcoPart 400
General information
Valves
To make it easier to service the cooling unit, shut-off valves must be fitted to
both the incoming and outgoing connections.
Air bleeding
The ground collector loop should not contain any air. Even very small amounts
of residual air can jeopardise the heat pump operation. See Filling and
bleeding below.
Insulation against condensation
All pipes in the brine system must be insulated against condensation,
otherwise heavy ice and condensation may form.
Filling and air bleeding
Pour CONVECTHEAT BIO-12 antifreeze fluid (brine) into the filling station.
Connect the hoses to the shut-off valves (98a and 98b) as shown in the
diagram. Note: The hoses shall be at least ¾”. Connect a powerful external
pump (101) for filling and bleeding. Then reset the three-way valve (100) and
open the valves (98a and 98b) so that the brine passes through the mixing
vessel (102). Also make sure that the valve (98d) is open.
For brine pump start-up, see the relevant manual for the EcoPart control
system.
Allow the brine to circulate in the system for a long period of time until it is
completely free of air. There may still be pockets of air even if no air comes
out with the fluid. Reset the three-way valve (100) so that any remaining air
can come out.
Bleed the level vessel (96) by loosening the plug or opening the valve at its
top.
Now close the valve (98a) while the filling pump is still running. The filling
pump (101) now pressurises the system. Also close the valve (98b) and turn
off the filling pump.
If the level in the level vessel is too low, close the valves (98c and 98d).
Unscrew the plug and fill the vessel to about 2/3 full. Screw the plug back in or
close the valve, and open the valves (98c and 98d).
Brine pump, standard
The brine pump has three speeds. The required speed shall be set depending
on the length of the brine hose being used. With ground source heat, for
example, the hose is longer than for geothermal (deep bore) heat, which can
therefore mean a greater need for a higher speed. The speed of the brine
pump is set so that the difference in temperature between brine in and brine
out is approx. 3 °C.
Brine pump, high efficiency
The brine pump can be set to two different control settings: pressure-regulated
speed or constant speed. Since the brine system has a fixed pressure drop,
constant speed must be set. See the diagram showing setting of the brine
pump. The pump setting is affected by the pressure drop in the circuit. For
this reason, the setting should be reviewed at each installation. In general,
constant operating pressure (option 2) must be selected. Try different settings
to find one that is suitable.
To attain the best system performance, the pump must be adjusted properly.
Try to achieve a temperature difference of approx. 2–4 K.
Set the red button to setup option 2. Adjust so that the correct temperature
difference is obtained.

16 CTC EcoPart 400
General information
[m/s]
P
1
[W]
H[m]
01 2
Q[m³/h]
Q[l/s]
Q[m³/h]
v
Rp1
Rp1¼
0123
0123456
0 0,4 0,8 1,2 1,6 2,0
0
1
2
3
4
5
6
7
0123456
7
7
0
100
200
max.
min.
min.
max.
Wilo-TOP-S 25/7
Wilo-TOP-S 30/7
1~230 V - Rp 1/ Rp 1¼
0 0,5 1,0 1,5 2,0 2,5 3,0
0
2
4
6
8
10
12
Q[m³/h]
Q[l/s]
0
200
400
P
1
[W]
H[m]
min.
Wilo-TOP-S 25/10
Wilo-TOP-S 30/10
1~230 V - Rp 1/ Rp 1¼
max.
min.
0246810
Q[m³/h]
024 6810
max.
012345
[m/s]
v
01234
Rp1
Rp1¼
p-c (constant) p-v (variable)
01234567
0
1
2
3
4
5
6
7
8
0
10
20
30
40
50
60
70
80
Wilo-Stratos-Para
25/1-8, 30/1-8
1~230 V - Rp1, Rp1¼
Q/m³/h
p/kPa
H/m
max.
∆p-c
01234567
0
1
2
3
4
5
6
7
8
0
10
20
30
40
50
60
70
80
Wilo-Stratos-Para
25/1-8, 30/1-8
1~230 V - Rp1, Rp1¼
Q/m³/h
p/kPa
H/m
∆p-v
max.
p-c (constant) p-v (variable)
0246810
0
2
4
6
8
10
12
0
12
20
40
60
80
100
120
Q/m³/h
p/kPa
H/m
max.
Wilo-Stratos-Para
25/1-12, 30/1-12
1~230 V - Rp1, Rp1¼
∆p-c
0246810
12
0
2
4
6
8
10
12
0
20
40
60
80
100
120
Q/m³/h
p/kPa
H/m
max.
∆p-v
Wilo-Stratos-Para
25/1-12, 30/1-12
1~230 V - Rp1, Rp1¼
WILO-Stratos PARA 25/12 (CTC EcoPart 412-417 LEP)
Top-S 25/7 (CTC EcoPart 406-410) Top-S 25/10 (CTC EcoPart 412-417)
5.3 Pump curves
5.3.1 Standard brine pump
5.3.2 High efficiency brine pump
WILO-Stratos PARA 25/8 (CTC EcoPart 406-410 LEP)

17CTC EcoPart 400
General information
Checking the brine system after installation
After a few days, you should check the fluid level in the vessel. Top up if
necessary and then close the valves (98c and 98d) when filling.
Level/expansion vessel
The vessel should be fitted to the incoming pipe from the ground source,
at the system's highest point. Remember that the vessel can produce
condensate. Fit the safety valve (105) as shown in the schematic diagram
and fit a suitable plug or shut-off valve to the top of the vessel.
If the vessel cannot be fitted at the highest point, a closed expansion
vessel must be fitted.
Filling kit with dirt filter
Arrows on the valve housing indicate the direction of flow. When cleaning
the filter, close the valves (98c and 100). Unscrew the filter cap and flush
the filter clean. When refitting, the pin under the filter holder should be
pushed into the designated hole in the filter housing. Top up with a little
brine, if necessary, before fitting the cap.
Antifreeze fluid (brine)
The antifreeze fluid circulates in a closed system. The fluid consists of
water and antifreeze solution. The recommended fluid for CTC EcoHeat/
Part heat pumps is CONVECTHEAT BIO-12. You should allow for approx.
1 l of antifreeze fluid per meter of collector hose. This applies to a hose
diameter of 40 mm.
Air pockets
To avoid air pockets, make sure that the collector hoses constantly rise
towards the heat pump. If this cannot be done, it must be possible to bleed
the system at the high points. The filling pump usually manages smaller
local height discrepancies.
Checking brine difference
When the heat pump is running, regularly check that the temperature
difference between the incoming and outgoing brine temperature is not too
high. If the difference is quite high, one of the reasons for this may be air in
the system or a blocked filter. If this is the case, the heat pump triggers the
alarm for this.
The factory setting for the alarm is 7 °C, but 9 °C is permitted for the
first 72 hours that the compressor is in operation, as microbubbles in the
system can reduce brine flow.
!Check and clean the
dirt filter after a very
short operation time.
!The fluid must be
mixed thoroughly
before the system gets
filled.

18 CTC EcoPart 400
General information
6. Electrical installation
Installation and switching on the heat pump shall be carried out by
qualified staff. All wiring should follow current regulations.
The communication cable used is an LiYCY (TP), which is a 4-conductor
shielded cable, where the communication conductors are twisted pairs.
Using another cable will mean that the colors of the conductors may not
match, so you need to check that the colors of the conductors from unit 1
are connected to the same colors on unit 2.
6.1 Series connection of heat pumps
When connected in series, the shielding of the communication cable
on the last heat pump shall be connected to earth (see Shielded
communication) and the heat pump shall also be terminated (see
Terminated position).
6.1.1 Shielded communication
The jumper (5) located between position 4 on the control terminal block
and position PE on the mains terminal block must be removed from all
heat pumps except the last one in the connection chain, and replaced (in
the pos. 4 on the control terminal block) by shielding that it is then wired to
the next heat pump in series.
5
5
N PE
1 2 3 4
Shielding
Shielding
Incoming communica-
tion from a controller or
preceding heat pump
Communication out
to the next heat pump
The last heat pump
in chain
Shielding
Green
Green Green
White
White White
Brown Brown
Brown
Heat pump in series connection The last heat pump in chain

19CTC EcoPart 400
General information
ON
1 2
Connecting the CTC Basic
Display (accessory)
CTC Basic Display (accessory)
6.2 Output relay for joint alarms
The EcoPart is equipped with a potential-free alarm output that is activated
if any alarm is active in the heat pump. This output can be connected to
a maximum load of 1 A 250 VAC. An external fuse should also be used.
A cable approved for 230 VAC must be used to connect this output,
irrespective of the load connected. For information on connection, see the
wiring diagram.
6.3 CTC Basic display (accessory)
The heat pump can be run without a parent system by using the CTC
Basic Display. The CTC EcoPart can then be controlled with a fixed return
temperature (standalone) or with thermostat control. See the manual for
the CTC Basic Display for more information.
6.3.1 Connection
ON
6.1.2 Terminated position
The last heat pump (the cooling module) connected in series must be
terminated. Ensure that DIP switch 2 is in the ON position on the heat
pump that is set as the last one.
ON
1 2
ON
ON
1 2

20 CTC EcoPart 400
General information
6.4 Electrical installation 400 VAC 3 phase
Power supply
The CTC EcoPart 400 shall be connected to 400 VAC 3 phase 50 Hz
and protective earth (PE). The minimum group fuse size is shown in the
Technical data. Should it be also connected to an EcoEl, its power input
shall be added as well since EcoPart is power supplied via EcoEl; the
interconnecting cable is available as an accessory.
Safety switch
The installation shall be preceded by a 4-pole safety switch which ensures
safe disconnection from all electrical power sources.
Connection
The CTC EcoPart 400 is power supplied with a 5-conductor cable that
supplies electric power to the compressor (400 VAC 3 phase) and a brine
circulation pump (230 VAC single phase).
1. Incoming control signal
2. Incoming power supply
3. Internal control signal
4. Internal connection 3x400 V
5. Jumper for shielding
L1 L2 L3 N PE
1 2 3 4
1
4
3
5
1
4
3
2
2