CTC Union EcoZenith i360 Series Manual

Providing sustainable energy solutions worldwide
162 505 77-1 2020-09-15
Important!
• Read carefully before use, keep for future reference.
• Translation of the original instructions.
Installation and Maintenance Manual
CTC EcoZenith i360
Indoor model with heat pump control
3x400V / 1x230V / 3x230V

The automatic bleeder is equipped with
shut off screws.
Important! Information on air bleeding
!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.
For the product to work as intended, the system must be
fully bled.
It is extremely important that a basic bleeding of the product is carried out
systematically and carefully.
Bleeding devices must be fitted to the system’s natural high points. A basic
bleeding of the hot water tank can be carried out upon installation by releasing
the safety valve, which must be fitted to the top of the product.
The water must be circulated during bleeding of the various subsystems: the
radiator systems, heat pump system and hot water charging system (to run the
pumps, 3-way valve etc. manually, go into the menu Installer/Service/Function
test). Also move the 3-way valve during the bleeding process. A careful basic
bleeding must be carried out before the system is put into operation and the
heat pump is started.
Tip:
Once basic bleeding is complete: increase the water pressure in the system
temporarily to approx. 2 bar.
• Automatic bleeding valves are included in the package and supplied as
standard for this product. They must be fitted to the top of the product
as shown in the picture.
• Important! Bleed any air remaining in the radiators (elements) and other
parts of the system after it has been in operation for a short time.
Small microbubbles gradually collect in the system’s ‘pockets’, and it can
take quite a long time before all the air is removed from the system. When the
pressure is temporarily increased, any remaining air pockets are compressed
and carried along more easily with the flow of water and can be released into
the ventilation devices.
Tip:
After the air is bled, there may be a drop in system pressure. Having the
system pressure too low increases the risk of noise in the system and of air
being ‘sucked’ in on the suction side of the pump. Keep an eye on the system
pressure. Bear in mind that the system pressure will vary during the year due to
changes in temperature in the heating circuit, which is completely normal.
If ‘gushing’ sounds can be heard from the product, this is a sign of remaining air.
A loss of heating functionality can also be a sign of remaining air.

162 505 77-1 2020-09-15
Installation and Maintenance Manual
CTC EcoZenith i360

4CTC EcoZenith i360
Table of Contents
Important! Information on air bleeding ______________________ 2
Safety instructions _______________________________________________________ 5
1. Technical data _______________________________________________________ 6
2. Measurements_______________________________________________________ 7
3. Overview CTC EcoZenith i360_____________________________ 8
3.1 Compatible heat pumps _____________________________________9
3.2 Options with CTC EcoZenith i360 ________________________9
3.3 Basic installation, CTC EcoZenith i360 _________________9
3.4 Delivery includes: _____________________________________________10
4. Important to remember! _____________________________________ 11
4.1 Transportation__________________________________________________11
4.2 Positioning ______________________________________________________11
4.3 Recycling ________________________________________________________11
4.4 After commissioning_________________________________________11
5. Pipe installation___________________________________________________ 12
5.1 Schematic diagram for air-to-water heat pump____ 12
5.2 Schematic diagram for air-to-water heat pump____ 13
5.3 Full schematic diagram ____________________________________14
5.4 Interactive schematic diagram __________________________15
5.5 Install hot water pipe ________________________________________16
5.6 Install pipe for radiator system ___________________________ 17
5.7 Install pipes to and from the heat pump______________19
5.8 Install waste water piping __________________________________ 20
5.9 Fill the heating circuit ________________________________________ 21
5.10 Bleed the entire system ____________________________________ 22
6. Electrical installation___________________________________________ 23
6.1 Overview of basic electrical installation _______________ 24
6.2 List of functions _______________________________________________25
6.3 Electrical parts list ____________________________________________26
6.4 Wiring diagram CTC EcoZenith i360 3x400V
Relay card A2__________________________________________________ 28
6.5 Wiring diagram CTC EcoZenith i360 3x400V
Flow heater E15_______________________________________________30
6.6 Wiring diagram CTC EcoZenith i360 3x400V
Terminal Block X2_____________________________________________ 31
6.7 Wiring diagram CTC EcoZenith i360 1x230V
Relay card A2__________________________________________________ 32
6.8 Wiring diagram CTC EcoZenith i360 1x230V
Flow heater E15_______________________________________________34
6.9 Wiring diagram CTC EcoZenith i360 1x230V
Terminal Block X2_____________________________________________ 35
6.10 Wiring diagram CTC EcoZenith i360 3x230V
Relay card A2__________________________________________________ 36
6.11 Wiring diagram CTC EcoZenith i360 3x230V
Flow heater E15_______________________________________________38
6.12 Wiring diagram CTC EcoZenith i360 3x230V
Terminal Block X2_____________________________________________ 39
6.13 Connection table for electrical components_________40
6.14 Wiring diagram for Expansion card_____________________ 42
6.15 Connection table for Expansion Card A3 ____________43
6.16 Sensor connection ___________________________________________44
6.17 Current sensor connection________________________________ 46
6.18 Setting electrical output in backup power supply _ 46
6.19 Resistance table for sensor _______________________________ 47
7. Installation Communication _______________________________ 48
7.1 Install ethernet cable ________________________________________ 49
7.2 CTC Remote - Screen Mirroring_________________________ 50
7.3 MyUplink - App________________________________________________ 50
8. First start______________________________________________________________ 51
9. Operation and Maintenance ______________________________ 53
10. Your home’s heating settings_____________________________ 54
11. System adjustments ___________________________________________ 58
11.1 Adjust circulation pump ____________________________________58
11.2 Pump curve for heating medium system
circulation pump ______________________________________________61
11.3 Flow check______________________________________________________61
11.4 Pressure differential for heating medium side_______62
11.5 Extra functions_________________________________________________63
12. Control system ____________________________________________________ 66
12.1 Navigate on the touchscreen_____________________________66
12.2 Start menu ______________________________________________________66
12.3 Alarm management__________________________________________ 66
12.4 Heating/Cooling_______________________________________________ 67
12.5 DHW ______________________________________________________________70
12.6 Ventilation _______________________________________________________70
12.7 Weekly program_______________________________________________71
12.8 Operation data_________________________________________________ 73
Installer ___________________________________________________________________81
12.9 Display____________________________________________________________81
12.10 Settings __________________________________________________________ 83
12.11 Define ___________________________________________________________ 102
12.12 Service__________________________________________________________ 115
13. Troubleshooting_________________________________________________ 120
13.1 Troubleshooting, heat _____________________________________ 120
13.2 Troubleshooting, hot water______________________________ 121
13.3 Information messages ____________________________________ 122
13.4 Alarm messages ____________________________________________ 123
14. Factory settings_________________________________________________ 125

5
CTC EcoZenith i360
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

6CTC EcoZenith i360
CTC EcoZenith
i360 L
CTC EcoZenith
i360 H
CTC EcoZenith
i360 L 1x230V
CTC EcoZenith
i360 L 3x230V
589400001 589401001 589400002 589400003
EAN 7333077094485 7333077094478 7333077094492 7333077094508
kg 172 185 172 172
kg 145 156 145 145
mm 781x694x1825 770x694x2090 781x694x1825 781x694x1825
mm 673x596x1657
(1652-1692)
673x596x1867
(1858-1883)
673x596x1657
(1652-1692)
673x596x1657
(1652-1692)
mm 1669 1928 1669 1669
°C 70 / 95 70 / 95 70 / 95 70 / 95
- 400V 3N~ 50Hz 400V 3N~ 50Hz 230V 1N~1 50Hz 230V 3~ 50Hz
kW 12.2 12.2 9.3 10.3
W 236 236 236 236
kW 8.9 / 11.9 / 11.9
/ - / -
8.9 / 11.9 / 11.9
/ - / -
2.9 / 4.6 / 5.8 / 7.5
/ 9
5 / 7.5 / - / 10 /-
IP IP X1 IP X1 IP X1 IP X1
st 31 31 30 4
kW 0/0.5/1/1.5/2/2.5/
2.8/3/3.3/3.5/3.8/
4.3/4.8/5.3/5.6/5.8
/6.1/6.3/6.6/7.1/
7.6/8.1/8.4/8.6/8.9
/9.1/9.4/9.9/10.4/
10.9/11.4/11.9
0/0.5/1/1.5/2/2.5/
2.8/3/3.3/3.5/3.8/
4.3/4.8/5.3/5.6/5.8
/6.1/6.3/6.6/7.1/
7.6/8.1/8.4/8.6/8.9
/9.1/9.4/9.9/10.4/
10.9/11.4/11.9
0/0,3/0,6/0,9/1,2/
1.5/1.8/2.1/2.3/
2.6/2.9/3.2/3.5/3.8/
4.1/4.4/4.6/4.9/5.2/
5.5/5.8/6.1/6.4/6.7/
6.9/7.2/7.5/7.8/
8.1/8.4/9
0/2.5/5/7.5/10
l 1.7 1.7 1.7 1.7
Bar 10 10 10 10
°C 65 65 65 65
°C 100 100 100 100
l210 235 304
XL XL XL XL
Designation
General data
Article number
Gross weight
Net weight
Dimensions DxWxH (with
packaging)
Dimensions DxWxH
(without packaging)
Required ceiling height
Max permitted
temperature of external
heat source, long-term/
short-term
Electrical data
Connection
Rated power
Rated power without
immersion heater
Group fuse,
16/20/25/32/50 A
matches electrical power
IP class
Number of steps for
electrical element
Power for each step for
electrical element
Hot tap water system
Water volume (V) (PED)
Max operating pressure (PED)
Max adjustable hot water temperature
Max operating temperature (TS) (PED)
Ekonomi Normal Komfort
Quantity of hot water (40°C)
Load profile*)
*) according to Regulation (EU) no. 813/2013
1. Technical data

7
CTC EcoZenith i360
L 225 225 225 225
Mpa/
Bar
0.3/3.0 0.3/3.0 0.3/3.0 0.3/3.0
°C 100 100 100 100
°C 70 70 70 70
m3/h 2.6 2.7 2.6 2.6
kPa
Heating medium system
Water volume (V) (PED)
Max operating
pressure (PS) (PED)
Max operating
temperature (TS) (PED)
Max adjustable
operating temperature
Product Kvs value
Pressure differential
diagram for product
including exchanger
and all internal pipes,
valves etc.
See pressure
differential diagram
in section “System
adjustment”
See pressure
differential diagram
in section “System
adjustment”
See pressure
differential diagram
in section “System
adjustment”
See pressure
differential diagram
in section “System
adjustment”
Built-in circulation
pump
Yes Yes Yes Yes
1657
20 (15-55)
563
54
673
1557
367
284
497 69
596
106
55 125
137
52
299
442
265
298
1825
694
781
Erfoderlig reshöjd: 1669mm
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
JJ
2020-02-06
CTC EcoZenith i360 låg 3x400V
EZ i360
2589400
Reservdelsstruktur: 586767-054
SJ
587800
blad 4/4
1657
20 (15-55)
563
54
673
1557
367
284
497 69
596
106
55 125
137
52
299
442
265
298
1825
694
781
Erfoderlig reshöjd: 1669mm
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
JJ
2020-02-06
CTC EcoZenith i360 låg 3x400V
EZ i360
2589400
Reservdelsstruktur: 586767-054
SJ
587800
blad 4/4


 


1657
20 (15-55)
563
54
673
1557
367
284
497 69
596
106
55 125
137
52
299
442
265
298
1825
694
781
Erfoderlig reshöjd: 1669mm
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
JJ
2020-02-06
CTC EcoZenith i360 låg 3x400V
EZ i360
2589400
Reservdelsstruktur: 586767-054
SJ
587800
blad 4/4
20 (11-46)
563
A
A
1825
1867
673
623
347
54
497 69
265
299
299
442
596
513
77
291
281
608
SECTION A-A
2090
694
781
Erfoderlig reshöjd: 1928mm
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
JJ
2020-05-04
CTC EcoZenith i360H 3x400V
EZ i360H
2589401
Reservdelsstruktur: 586767-054
DP
blad 2/2
20 (11-46)
563
A
A
1825
1867
673
623
347
54
497 69
265
299
299
442
596
513
77
291
281
608
SECTION A-A
2090
694
781
Erfoderlig reshöjd: 1928mm
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
JJ
2020-05-04
CTC EcoZenith i360H 3x400V
EZ i360H
2589401
Reservdelsstruktur: 586767-054
DP
blad 2/2
20 (11-46)
563
A
A
1825
1867
673
623
347
54
497 69
265
299
299
442
596
513
77
291
281
608
SECTION A-A
2090
694
781
Erfoderlig reshöjd: 1928mm
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
JJ
2020-05-04
CTC EcoZenith i360H 3x400V
EZ i360H
2589401
Reservdelsstruktur: 586767-054
DP
blad 2/2


2. Measurements
High Model
Low Model
Cold water 22 mm To HP 22 mm
DHW 22 mm From HP 22 mm
Return flow 22 mm Expansion/lifting sleeve
3/4"
3/4" ins.
Primary flow 22 mm Automatic bleeder 1/2" ins.

8CTC EcoZenith i360
11
12
15
16
1
9
19
17
10
14
13
6
2
5
7
18
5
3. Overview CTC EcoZenith i360
The picture below shows the basic construction of CTC EcoZenith i360.
If a heat pump is connected, the energy in the air or bedrock/ground is drawn up by the
cooling system. The compressor then increases the temperature to a usable level. Afterwards it
releases the energy for the heating circuit and DHW. The built-in immersion heater helps when
additional heat is needed or when a heat pump is not connected.
1.
Magnetite filter
Automatic
bleeder
2.
Filling
manifold
7.
Dirt filter for
tap water
5.
Hot water out
10.
Primary flow to
radiator system
11.
Plate heat
exchanger
12.
Pump, DHW
charging
15.
Expansion
vessel
16.
Circulation
pump
17.
3-way valve
HS/DHW
18.
Drain valve
19.
Through-
flow heater
electricity
Low Model High Model
6.
Cold water in
9.
Return from
radiator system
13.
From heat
pump
14.
To heat pump
Safety valve BleederManometer

9
CTC EcoZenith i360
1
3.1 Compatible heat pumps
CTC EcoAir 500M/600M
series variable speed air-to-
water
• CTC EcoAir 510M
• CTC EcoAir 610M
• CTC EcoAir 614M
• CTC EcoAir 622M
CTC EcoAir 400 series
air-to-water
• CTC EcoAir 406
• CTC EcoAir 408
CTC EcoPart 400 series
fluid-to-water
• CTC EcoPart 406
• CTC EcoPart 408
• CTC EcoPart 410
• CTC EcoPart 412
CTC EcoPart 600 series
speed controlled liquid-to-
water
• CTC EcoPart 612
• CTC EcoPart 616
EcoZenith i360
1 heating circuit
1 compatible EcoAir heat pump
EcoZenith i360
1 heating circuit
1 compatible EcoPart heat pump
3.2 Options with CTC EcoZenith i360
* In addition to the basic installation, accessories are required such as: Extra sensor, Mixing Valve group 2, Expansion
Card, etc. Volume tank CTC VT 80 is recommended for large heating needs or for systems with a high pressure
differential. See chapter "System adjustments".
3.3 Basic installation, CTC EcoZenith i360
EcoDesign information and energy labelling stickers about the current combination (current package) can be
retrieved/downloaded from www.ctc.se/ecodesign.
Information and energy labelling stickers must be handed over to the final consumer of the package in question.

10 CTC EcoZenith i360
12 13
14
151110
17
5
169
1
6
3
8
24 7 18
6
19
3.4 Delivery includes:
No. Designation Quantity*
1 Outdoor sensor 1/1/1/1
2 Room sensor 1/1/1/1
3 Safety valve 2.5 bar 3/4" ext. 1/1/1/1
4 Support sleeve 22x1 4/5/4/4
5 Filter ball valve with magnet 1/1/1/1
6 Dirt filter 3/4" int. 0.4 mm 1/1/1/1
7 Current sensor 3/3/0/3
8 Manifold 1/1/1/1
9 Automatic bleed valve 2/2/2/2
10 Bushing 3/4"x3/8" 1/1/1/1
11 Manometer 1/1/1/1
12 Filling valve 1/1/1/1
13 T-connection 22-15-22 2/2/2/2
14 Filler pipe cu15 2/1/2/2
15 Filler pipe cu15 0/1/0/0
16 Drainage valve 1/2" 0/1/0/0
17 Bleeding instructions 1/1/1/1
18 Installation instructions for bleeding
and filling EZi360
1/1/1/1
19 Bushing 1/2"x3/8 1/1/1/1
* CTC EcoZenith i360: L (3x400V)/H (3x400V)/L 1x230V/L 3x230V
• CTC EcoZenith i360.
• Installation and Maintenance Manual.
• Supplied Components (list and picture below of supplied components for CTC EcoZenith i360).

11
CTC EcoZenith i360
4. Important to remember!
Check the following points at the time of delivery and installation:
4.1 Transportation
Transport the unit to the installation site before removing the packaging.
Handle the product in the following manner:
• Forklift.
• Lifting eye that has been fitted to the lifting sleeve on top of the product
in the expansion connection.
• Lifting band around the pallet. NB: Can only be used with the
packaging on.
Remember that the product has a high centre of gravity and should be
handled with caution.
• The product must be transported and stored in an upright position.
4.2 Positioning
• 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.
4.3 Recycling
• The packaging must be deposited at a recycling station or with the
installation engineer for correct waste management.
• Obsolete products must be disposed of correctly and transported to a
waste station or distributor/retailer offering this service.
It is very important that the product’s refrigerant is disposed of
correctly.
Disposal of the product as household waste is not permitted.
4.4 After commissioning
• The installation engineer advises the property owner on the design and
servicing of the system.
• The installation engineer fills in a checklist and contact information –
the customer and installation engineer sign the list, which the customer
keeps.
• Register the product for warranty and insurance via the website.
https://ctc.se/kundservice#garantiregistrering
https://www.ctc-heating.com/customer-service#warranty-registration

12 CTC EcoZenith i360
CTC
MP
B15 B11
3
4
2
1
5
(x 2)
5. Pipe installation
The installation must be carried out in accordance with the applicable
standards. Do not forget to flush the heating circuit clean before
connecting. Apply all the installation settings based on the description in the
section entitled "First start".
5.1 Schematic diagram for air-to-water heat pump
EcoZenith i360
1 heating circuit
1 compatible CTC EcoAir heat pump from the 400, 500 or 600 series.
!Minimum water
volume in the heating
circuit (>25 ºC) for
reliable defrosting
functionality:
EcoAir 610M 80 l
EcoAir 614M 80 l
EcoAir 622M 120 l
EcoAir 406 80 l
EcoAir 408 100 l
EcoAir 510
1x230 V
50 l
In order to adjust the pressure in
the expansion vessel and check the
pipe fittings before the first start, the
front needs to be dismantled.
1. Remove magnetic strip.
2. Loosen two screws.
3. Fold out front.
4. Lift up and out front.
5. Beware of cable between display
and cabling.

13
CTC EcoZenith i360
MP
CTC
B15 B11
5.2 Schematic diagram for air-to-water heat pump
CTC EcoZenith i360
1 heating circuit
1 compatible heat pump from the CTC EcoPart 400 or 600 series.

14 CTC EcoZenith i360
MP
M
M M
M
Y47
G2
Y2
Y50
G51
B50
B12
Y42 Y41
B9 B47
G46
Y11
G1
B1
B7
B2
B11
B15
B12
M
M
G2
Y2
B2
G1
B1
B7
B47
G46
Y11
B9
M
M
Y41
M
M
Y42
G51
B50
In addition to basic
installation
Heating circuit 2
Equalisation tank Volume tank
External Boiler
EHS-tank
Pool heating
Heat pump
Heating circuit 1
DHWC: domestic hot
water circulation
5.3 Full schematic diagram
This is a full schematic diagram of the connection options for the CTC EcoZenith i360.
Different installations and systems may look different, e.g. a one or two-pipe system,
which means that the finished installation may be different.

15
CTC EcoZenith i360
MP
MP
M
M
MP
B31
G30
Y31
B46
Y11
Y11
B30
Y11
G32
G31
Y11 Y11
MP
MP
M
M
MP
MP
MP
M
M
MP
B31
G30
Y31
B30
Y11
B46
G46
Y11
Y11
G32
G31
MP
M
M
mixing valve
diverting valve
control valve
solenoid valve
non-return valve
shut-off valve
sensor
pump
dirt filter
pressure sensor
safety valve
level vessel
expansion tank
heat exchanger
Solar Energy
Passive cooling
External
storage
tank (diff
thermostat)
Collector, in
Collector, out
Filler manifold
5.4 Interactive schematic diagram
On CTC’s website, you can bring up and print out the schematic diagram for the installation
you want by clicking the option in the interactive pdf file.

16 CTC EcoZenith i360
1
3
4
2
5.5.1
5.5.2
5.5.3
5.5.4
1
2
3
4
5.5.1
5.5.2
5.5.35.5.4
5.5 Install hot water pipe
DHW
5.5.1 Install dirt filter (1).
5.5.2 Install cold water supply (2) with non-return valve.
5.5.3 Install the filling valve (3).
5.5.4 Install hot water pipe from tank (4).
Check function – flush.
Low Model
High Model
Plate heat exchanger
Hot water charge
pump
!NB: To facilitate servicing, it is important to fit shut-off valves to both the primary flow
and the return line.

17
CTC EcoZenith i360
5.6.2.
5.6.3.
5.6.1.
!NB: To facilitate servicing, it is important to fit shut-off valves to both the primary flow
and the return line.
High ModelLow Model
5.6.1
primary flow to radiator
system
5.6.2
return from radiator
system
diverting valve DHW/HS
electric flow heater
circulation pump
5.6.3. adjust
expansion tank
pressure
filling valve
5.6 Install pipe for radiator system
Heating circuit
5.6.1 Install primary flow with shut-off valve.
5.6.2 Install return line.

18 CTC EcoZenith i360
H
!The expansion tank provided is pre-pressurised to approx. 1 bar, and therefore
needs to be adjusted to a suitable pre-pressure for the building. This must be
done before the system is filled with water.
If an open expansion tank is used, the distance between the expansion tank and
the highest placed radiator must not be below 2.5 m, in order to avoid introducing
oxygen into the system.
If a heat pump is connected with another heat source, e.g. an existing boiler, the
installations must have separate expansion vessels.
Maximum
height (H) (m)
Pre-pressure
(bar)
Maximum volume in the heating
circuit (excluding product) (L)
5 0.5 310
10 1.0 219
15 1.5 129
The pre-pressure in the expansion tank is calculated according to the height
(H) between the highest-positioned radiator and the expansion tank. The
pre-pressure must be checked/set before the system is filled with water.
The system pressure must be set 0.3 bar higher than the pre-pressure in
the expansion tank. For example, a pre-pressure of 1.0 bar (5 mvp) means a
maximum permitted height difference of 10 m.
5.6.3 Adjust the pre-assembled expansion tank to the right pre-pressure by
using the valve to raise or lower the pressure.
Adjustment of
pre-pressure.

19
CTC EcoZenith i360
5.7.1
5.7.2
5.7 Install pipes to and from the heat pump
Heat pump
5.7.1 Install pipe to the heat pump with solenoid filter ball valve.
5.7.2 Install pipes from heat pump.
Install any adjustable by-pass coupling past the heat pump. (*a by-pass
coupling is only used for electric operation without a heat pump).
Low Model High Model
5.7.1
to heat pump solenoid
filter ball valve with
support sleeves fitted,
see instructions in
packaging.
Drain valve is mounted
for high model.
* without a heat pump, to
and from heat pump must
be connected.
!CTC EcoZenith i360 is only approved for installation together with CTC Heat pumps.
See the recommended systems at the start of the installation instructions.
5.7.2
from heat pump.

20 CTC EcoZenith i360
!NB: Safety valve
The tank’s safety valve (2.5 bar) for the heating circuit must be fitted in
accordance with applicable regulations. The waste pipe is connected to the
waste system, either directly to the floor drain or via a funnel. The waste pipe
must slope towards the waste system, be installed frost-free and left open to
the atmosphere/without pressure. The waste pipe must be fitted to the waste
system.
5.8 Install waste water piping
Waste water
5.8.1 Fit the safety valve, bleed valve and manometer. Components and
assembly instructions are included in the additional pack for the
product.
5.8.2 Install waste water piping.
5.8.3 The bleed valve is activated by loosening the bleeder screw, which
should then be closed after a few minutes.
High Model
bleed valve
Safety valve
Manometer
to waste water piping