CTC Union EL Manual

162 605 18-1 2021-08-18
Providing sustainable energy solutions worldwide
Installation and Maintenance Manual
CTC EL
Electric boilers
Models 9 / 15 / 26 / 42
Important!
• Read carefully before use, keep for future reference.
• Translation of the original instructions.

Installation and Maintenance Manual
CTC EL
Electric boilers
Models 9 / 15 / 26 / 42
162 605 18-1 2021-08-18

For your own reference
Fill in the information below. It may come in useful if anything should happen.
Product: Manufacturing number:
Installer: Name:
Date: Tel. no.:
No liability is accepted for any misprints. Subject to design changes.
Table of contents
Checklist ______________________________________ 5
Safety instructions _____________________________ 7
1. Important to remember! _______________________________________ 8
1.1 Transportation____________________________________________________8
1.2 Positioning ________________________________________________________8
1.3 Recycling __________________________________________________________8
1.4 After commissioning___________________________________________8
2. Component location _____________________________________________ 9
2.1 CTC EL 9 __________________________________________________________9
2.2 CTC EL 15 ______________________________________________________10
2.3 CTC EL 26 ______________________________________________________11
2.4 CTC EL 42 ______________________________________________________12
3. Technical data / Energy labelling ______________________ 13
4. Measurements_____________________________________________________ 14
4.1 CTC EL 9 ________________________________________________________14
4.2 CTC EL 15 ______________________________________________________15
4.3 CTC EL 26 ______________________________________________________16
4.4 CTC EL 42 ______________________________________________________17
5. Pressure differential diagram_____________________________ 18
6. Pipe installation___________________________________________________ 19
7. Electrical installation___________________________________________ 20
7.1 Connection to CTC EcoLogic control system ______ 20
7.2 Connection to CTC EL______________________________________ 20
7.3 CTC EcoLogic menu system _____________________________ 20
8. Wiring diagram CTC EL 9___________________________________ 21
9. Wiring diagram CTC EL 15_________________________________ 22
10. Wiring diagram CTC EL 26_________________________________ 23
11. Wiring diagram CTC EL 42_________________________________ 24

The checklist must always be completed by the installation engineer
• In the event of servicing, this document may need to be provided
• Installation must always be carried out according to the Installation and Maintenance Instructions
• Installation must always be carried out according to professional standards
Following installation, the unit must be inspected and functional checks performed as
indicated below:
Pipe installation
The system filled, positioned and adjusted according to professional standards and the instructions
Product placed to facilitate service
Pumps, valves, etc. sized according to required flows
System tested for leakage and correctly sealed
Bleeding performed (subsequent bleeding may be necessary)
Safety equipment fitted and inspected/functionally tested
Overflow pipes from safety valves routed to floor drain
Tank system flushed with cold freshwater as per these instructions
Secondary visit to inspect seals and check that system bleeding performed
Electrical installation
Safety switch installed
Cable routing correct according to applicable regulations
Correct fuse installed (group fuse)
Customer information (adapted to the relevant installation)
Start-up with customer/installer
Review of heating unit connected to the tank system
Installation and Maintenance Manual given to the customer
Check and filling, heating circuit
Fine-tuning information, valve settings, etc.
Information about operational disruptions and appropriate measures
DHW mixing valve placement and settings
Safety valve function test
Warranties and insurance
Installation verification/warranty filled in and posted
Information and procedures for reporting faults
______________________________________ ______________________________________
Date/Customer Date/Installer
!If these instructions are not followed when installing, operating and maintaining
the system, Enertech’s obligation under the applicable warranty terms is not bind-
ing
Checklist

6CTC EL 9-42 kW
Congratulations on your new product!
You have just purchased a CTCEL electric boiler, with
which we hope you will be very pleased. Read about
how to install and take care of your electric boiler on the
following pages.
Save this manual containing the installation and
maintenance instructions. If properly maintained, you will
be able to enjoy the use of your system for many years.
This manual provides all the information you will need.
CTC EL is an electric boiler that, if necessary, provides
additional heat for your heating system.
CTC EL is externally controlled by the CTC EcoLogic
L/M control system, by allowing, for example, a
different number of power groups to be connected via
contactors depending on power output.
CTC EL is available in four models, which are named
according to the maximum output: 9 kW, 15 kW, 26 kW
and 42 kW.
The electric coils in the electric boiler tube are made
of acid-resistant steel (SIS 2333) and have a very long
service life.

7CTC EL 9-42 kW
Safety instructions
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’s electrical systems should only be installed and serviced by a
qualified electrician.
Safety valve check:
-Safety valve for boiler/system to be checked regularly.
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

8CTC EL 9-42 kW
1. Important to
remember!
Check the following in particular on delivery and installation:
1.1 Transportation
• Transport CTC EL to the installation site before removing the
packaging.
1.2 Positioning
• Remove the packaging and check before installation that the product
has not been damaged in transit. Report any transport damage to the
carrier.
• The product must be installed upright.
• For servicing, a space of at least 500 mm is required in front of the
product. If this is not possible, detachable connectors must be used.
1.3 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.
Do not discard the product with household waste.
1.4 After commissioning
• The installation engineer advises the property owner on the design and
servicing of the system.
• The installer completes a checklist and provides contact information –
the customer and installer sign the list, which is kept by the customer.
• Make sure to register for warranty and insurance on the CTC website:
https://www.ctc-heating.com/customer-service#warranty-registration

9CTC EL 9-42 kW
2. Component location
1 Electric heater
2 Overheating protector
3 Terminal block
4 Contactor
5 Contactor
6 Connection, primary flow G32
7 Connection, return flow G32
8 Cable entry
9 Bleeding
10 Mounting holes, 4 pcs
2.1 CTC EL 9
10
2
3
88
4
5
7
6
1
9
Komponentlista
Komponentplacering sett framifrån, lock bortlyft.
Pos Benämning ArtNr Reservdel
1 Elpatron (-R1) 589846301
2
Överhettningsskydd (-B1) 589855301
3
Anslutningsplint (-X9)
4 Kontaktor, 3,0 kW (-K1) 589850301
5
Kontaktor, 6,0 kW (-K2) 589850301
6
Anslutning, framledning, G 32
7 Änslutning, returledning, G 32
8 Kabelgenomföring
9 Avluftning
10 Monteringshål 4 st (Ø 6 mm)
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
1:5
EAN
2021-05-10
CTC EL 9
CTC EL
A 589840
Reservdelslista 586767071
blad 2/2

10 CTC EL 9-42 kW
1 Electric heater
2 Overheating protector
3 Terminal block
4 Contactor
5 Contactor
6 Backup thermostat
7 Connection, primary flow G32
8 Connection, return flow G32
9 Cable entry
10 Bleeding
11 Mounting holes, 4 pcs
2.2 CTC EL 15
1
8
7
10 2
6
4
5
3
99
11
Komponentlista
Komponentplacering sett framifrån, lock bortlyft.
Pos Benämning ArtNr Reservdel
1 Elpatron (-R1) 589847301
2 Överhettningsskydd (-B1) 589856301
3
Anslutningsplint (-X9)
4 Kontaktor, 5,0 kW (-K1) 589850301
5 Kontaktor, 10,0 kW (-K2) 589850301
6
Reservlägestermostat (-B2) 589858301
7 Anslutning, framledning, G 40
8 Anslutning, returledning, G 40
9 Kabelgenomföring
10 Avluftning
11 Monteringshål 4 st (Ø 6 mm)
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
1:5
EAN
2021-05-10
CTC EL 15
CTC EL
A 589841
Reservdelslista 586767071
blad 2/2

11CTC EL 9-42 kW
2.3 CTC EL 26
1
5
6
7
8
4
12 12
3
9
13
10
11
2
Komponentlista
Komponentplacering sett framifrån, lock bortlyft.
Pos Benämning ArtNr Reservdel
1 Elpatron (-R1) 589848301
2
Överhettningsskydd (-B1) 589857301
3
Automatsäkring 589859301
4
Anslutningsplint (-X9)
5 Kontaktor (-K1) 589851301
6
Kontaktor (-K2) 589852301
7
Kontaktor (-K3) 589852301
8
Kontaktor (-K4) 589853301
9 Reservlägestermostat (-B2) 589858301
10
Anslutning, framledning, G 32
11 Anslutning, returledning, G 32
12 Kabelgenomföring
13 Avluftning
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
1:5
EAN
2021-05-10
CTC EL 26
CTC EL
A 589842
Reservdelslista 586867071
blad 2/2
1 Electric heater
2 Overheating protector
3 Automatic circuit breaker
4 Terminal block
5 Contactor
6 Contactor
7 Contactor
8 Contactor
9 Backup thermostat
10 Connection, primary flow G32
11 Connection, return flow G32
12 Cable entry
13 Bleeding

12 CTC EL 9-42 kW
1 Electric heater
2 Overheating protector
3 Automatic circuit breaker
4 Terminal block
5 Contactor
6 Contactor
7 Contactor
8 Contactor
9 Contactor
10 Backup thermostat
11 Connection, primary flow G40
12 Connection, return flow G40
13 Cable entry
14 Bleeding
1:5
A
A
SECTION A-A
1
1
2
2
3
4
5
6
7
8
9
10
11
12
13
13
14
14
Komponentlista
Pos Benämning ArtNr Reservdel
1 Elpatron (-R1) 589849301
2
Överhettningsskydd (-B1) 589857301
3
Automatsäkring 589859301
4
Anslutningsplint
5 Kontaktor (-K1) 589851301
6
Kontaktor (-K2) 589852301
7 Kontaktor (-K3) 589854301
8
Kontaktor (-K4) 589852301
9
Kontaktor (-K5) 589854301
10
Reservlägestermostat (-B2) 589858301
11
Anslutning, framledning, G 40
12 Anslutning, returledning, G 40
13 Kabelgenomföring
14 Avluftning
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
1:10
EAN
2021-05-10
CTC EL 42
CTC EL
A 589843
Reservdelslista 586767071
blad 2/2
2.4 CTC EL 42

13CTC EL 9-42 kW
3. Technical data / Energy labelling
Technical data CTC EL 9 kW CTC EL 15 kW CTC EL 26 kW CTC EL 42 kW
Article number 589840001 589841001 589842001 589843001
EAN 7333077098377 7333077098384 7333077098353 7333077098360
Rated voltage 400V 3N~ 50Hz
Electric heater output 9 15 26 42
Fuse, electric heater 16 25 40 63
Enclosure class IP 44 IP 21
Cable area, power supply mm24 x 2.5 4 x 6 (21 A/
phase)
4 x 6 (37 A/
phase)
4 x 16 (60 A/
phase)
Cable area, operating
current
mm23 x 1.5 5 x 1.5 5 x 1.5 5 x 1.5
Weight kg 9.3 11 15 33
Dimensions (DxWxH) mm 138x244x563 138x244x563 138x244x563 402x354x712
Volume L 1.6 4.5 4.5 10
Max. permissible pressure
in boiler
MPa / bar 0.7 / 7
Min. water ow m3/h 0.45 1.1 1.4 2.1
Max. return temperature °C 58 68 78 78
Connection, supply/return G 1/4” G 1 1/4” G 1 1/4” G 1 1/2”
Material, electric heater SS 2348 EN 1.4404
Material, tube SS 2333 EN 1.4301
Energy label CTC EL 9 kW CTC EL 15 kW CTC EL 26 kW CTC EL 42 kW
Energy efciency class D D D D
Nominal heat output (Pdesign) kW 9 15 26 42
Annual energy consumption, room
heating
kWh 20310 33850 58674 94781
Seasonal average efciency, room
heating
% 37 37 37 37
Sound power LWA indoors dB 35 35 35 35

14 CTC EL 9-42 kW
4. Measurements
4.1 CTC EL 9
300 92
142 60
563 29
15
15
65
244
138
Levereras 21 st/pall i neutral kartong,
märkt med leveransdekal enl specifikation på alla fyra sidor.
Produkten består av:
* CTC EL 9
* CTC Emblem köpt av CTC i Ljungby, artnr 584233301
* CTC Sveriges manual; I&S CTC EL 9-42-sv, artnr 16260118-X
FLERA MANUALER?
* Ecodesign och Fiche
* Dataskylt enl specifikation.
Prototype/Quote Drawing
Not for production! At start of production
or manufacturing of fixtures/tools, contact
CTC
to be provided with a registerd drawing.
Ändr. meddel. Datum Nr Ändring Ändr. av Kontr. av
00288 2021-05-10 1 Ny artikel EAN
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
1:5
EAN
2021-05-10
CTC EL 9
A 589840
blad 1/2

15CTC EL 9-42 kW
4.2 CTC EL 15
29 563
60 142
300 92
15
15
65
244
138
Levereras 21 st/pall i neutral kartong,
märkt med leveransdekal enl specifikation på alla fyra sidor.
Produkten består av:
* CTC EL 15
* CTC Emblem köpt av CTC i Ljungby, artnr 584233301
* CTC Sveriges manual; I&S CTC EL 9-42-sv, artnr 16260118-X
FLERA MANUALER?
* Ecodesign och Fiche
* Dataskylt enl specifikation.
Prototype/Quote Drawing
Not for production! At start of production
or manufacturing of fixtures/tools, contact
CTC
to be provided with a registerd drawing.
Ändr. meddel. Datum Nr Ändring Ändr. av Kontr. av
00288 2021-05-10 1 Ny artikel EAN
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
1:5
EAN
2021-05-10
CTC EL 15
A 589841
blad 1/2

16 CTC EL 9-42 kW
4.3 CTC EL 26
350 92
142 60
37 563
15
15
65
244
138
Levereras 21 st/pall i neutral kartong,
märkt med leveransdekal enl specifikation på alla fyra sidor.
Produkten består av:
* CTC EL 26
* CTC Emblem köpt av CTC i Ljungby, artnr 584233301
* CTC Sveriges manual; I&S CTC EL 9-42-sv, artnr 16260118-X
FLERA MANUALER?
* Ecodesign och Fiche
* Dataskylt enl specifikation.
Prototype/Quote Drawing
Not for production! At start of production
or manufacturing of fixtures/tools, contact
CTC
to be provided with a registerd drawing.
Ändr. meddel. Datum Nr Ändring Ändr. av Kontr. av
00288 2021-05-10 1 Ny artikel EAN
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
1:5
EAN
2021-05-10
CTC EL 26
A 589842
blad 1/2

17CTC EL 9-42 kW
4.4 CTC EL 42
354
712
15
15
350 209
85
350
402
100
75
Levereras 1 st/halvpall i neutral kartong,
märkt med leveransdekal enl specifikation på alla fyra sidor.
Produkten består av:
* CTC EL 42
* CTC Emblem köpt av CTC i Ljungby, artnr 584233301
* CTC Sveriges manual; I&S CTC EL 9-42-sv, artnr 16260118-X
FLERA MANUALER?
* Ecodesign och Fiche
* Dataskylt enl specifikation.
Prototype/Quote Drawing
Not for production! At start of production
or manufacturing of fixtures/tools, contact
CTC
to be provided with a registerd drawing.
Ändr. meddel. Datum Nr Ändring Ändr. av Kontr. av
00288 2021-05-10 1 Ny artikel EAN
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
1:10
EAN
2021-05-10
CTC EL 42
A 589843
blad 1/2

18 CTC EL 9-42 kW
5. Pressure differential diagram
CTC EL 9 / CTC EL 15
0
0,5
1
1,5
2
2,5
3
3,5
123456
m3/h
pressure kPa
9kW
15kW
CTC EL 26 / CTC EL 42
0
1
2
4
6
8
10
12
2 4 6 8 9 75
3
42 kW
26 kW

19CTC EL 9-42 kW
6. Pipe installation
Pipe installation must be carried out in accordance with the applicable
standards. The electric cassette must be installed upright.
Safety valve
The electric cassette must be equipped with an approved safety valve.
Check the operation of the valve at least four times a year by briefly opening
and closing the valve to make sure that water is flowing through it. Reset the
pressurise by refilling the water.
Drainage valve
Always shut off power to the electric cassette when draining to avoid
damaging the electric heater’s electrical coils.
Drain the system of water using a drainage valve at the bottom of the pipe
installation. The remaining water in the electric cassette must be emptied
through the drainage connection. If drainage of the system is normally
performed through the electric cassette’s drainage connection, a drainage
valve can be fitted there.
Drain the water when the heating circuit will be switched off for an extended
period of time.
Circulation pump
A circulation pump must be used to ensure the least possible water flow over
the electric heater. A bypass valve and a pressure expansion vessel must be
installed if the system has valves to completely shut down circulation in the
heating circuit.
The electric cassette must be
installed upright

20 CTC EL 9-42 kW
7. Electrical installation
Safety information
• Installation and connections in the electric cassette must be performed
by a licenced electrician.
• All wiring shall be installed according to applicable requirements.
Also refer to the "Safety Instructions" chapter.
Power supply
The product must be connected to 400 V 3N~, 50 Hz. For fuse ratings and
dimensions for the supply cable and operating current, refer to the "Technical
Data" chapter.
Omnipolar safety switch
The installation must be preceded by an omnipolar safety switch according
to overvoltage category III, which ensures disconnection from all electric
power sources.
Backup thermostat
The electric cassette is controlled externally by CTC EcoLogic L/M, but can
be forced to run via thermostat if there is no control voltage.
Carefully check the primary flow temperature and thermostat setting when
forcing. A too high a primary flow temperature may damage the system!
7.1 Connection to CTC EcoLogic
control system
CTC EL must be connected to the following terminal blocks on the EcoLogic
relay card:
Additional heat source CTC EL (E2), 0-3 step / 0-7 step*
Relay output, Step 1 EL1A
Relay output, Step 2 EL1B
Relay output, Step 3 EL1A+EL1B
Relay output, Step 4 EL2A
Relay output, Step 5 EL1A+EL2A
Relay output, Step 6 EL1B+EL2A
Relay output, Step 7 EL1A+EL1B+EL2A
Also refer to the wiring diagram and the chapter titled "Electrical Installation"
in the EcoLogic L/M Installation and Maintenance Manual.
7.2 Connection to CTC EL
For connection to the electrical cassette’s terminal block, refer to the
attached electrical diagram for CTC EL.
7.3 CTC EcoLogic menu system
In the EcoLogic menu system, CTC EL (additional heat source E2) must first
be defined (connected to the system). Choose between 0-3 steps and 0-7
steps.
All relevant menus are presented in the EcoLogic L/M Installation and
Maintenance Manual.
From CTC EcoLogic wiring diagram
*Connect max. 13 A per relay. For higher
current, connect via contactor.
!Installation must be car-
ried out by a qualified
professional in accord-
ance with applicable regu-
lations.
!Reset the temperature
limiter if it has tripped dur-
ing transport.
1
EL2B
EL2A
L1
EL1B
EL1A
20
21
22 23