CTC Union GSi 600 Series Manual

Providing sustainable energy solutions worldwide
162 505 58-1 2020-09-16
Important!
• Read carefully before use, keep for future reference.
• Translation of the original instructions.
Installation and Maintenance Manual
CTC GSi 600
Model 608 / 612 / 616
400V 3N~/ 230V 1N~/ 230V 3N~

!
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. Fold out the front cable harness and loosen the flat
pin on the red EMC cable.
5. Pull the cooling module by first lifting the front
edge slightly with the carrying handles.
6. Lift the cooling module using the carrying handles
and shoulder straps.
7. 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.
8. Before the cooling module is tightened into
position, ensure the EMC cable is affixed.
Removing the cooling module
• Any work done on the product’s cooling system should be done by authorised
personnel only.
• Close the safety switch before doing any work on the product.

162 505 58-1 2020-09-16
Installation and Maintenance Manual
CTC GSi 600
Modulating ground source heat pump
400V 3N~/ 230V 1N~/ 230V 3N~

4CTC GSi 600
Table of Contents
Important! Information on air bleeding ______________________ 6
Safety instructions _______________________________________________________ 7
Your home’s heating settings______________________________________ 8
1. Technical data _____________________________________________________ 12
1.1 CTC GSi 600, 3x400 V _____________________________________ 12
1.2 CTC GSi 612, 1x230 V, 3x230 V________________________ 14
1.3 Operating range CTC GSi _________________________________16
1.4 Measurements_________________________________________________ 17
2. Design __________________________________________________________________ 18
3. Parameter list ______________________________________________________ 19
4. Important to remember! _____________________________________ 20
4.1 Transportation__________________________________________________20
4.2 Positioning ______________________________________________________20
4.3 Recycling ________________________________________________________20
4.4 After commissioning_________________________________________ 20
5. Installation____________________________________________________________ 21
5.1 Unpacking_______________________________________________________ 21
5.2 Control functions (std.) and with Expansion Card_22
6. Pipe installation___________________________________________________ 23
6.1 Schematic diagram __________________________________________23
7. Connecting the brine system_____________________________ 38
7.1 Connections____________________________________________________ 38
7.2 Brine system schematic diagram _______________________ 41
8. Electrical installation___________________________________________ 45
8.1 Sensor connection ___________________________________________46
8.3 Checking connected sensors ____________________________ 47
8.4 Pressure/level switch ________________________________________ 47
8.5 Setting electrical output in backup power supply _47
8.2 Pump Diff thermostat function (G46) on/off _________ 47
8.6 Heating circuit 2 (alt. Passive cooling)_________________ 48
8.7 Pool (accessory) ______________________________________________49
8.8 External heat source (EHS)________________________________ 49
8.9 CTC EcoVent (accessory)__________________________________49
8.10 CTC SmartControl (accessory) __________________________ 49
8.11 Solar heat (accessory) ______________________________________50
8.12 Current sensor connection (accessory)_______________51
8.13 Electrical diagram tank (A2), 3x400V /1. _____________52
8.14 Flow heater (E15), 3x400V /2. ___________________________54
8.15 Terminal block (X2), 3x400V /3.__________________________ 55
8.16 Electrical diagram tank (A2), 1x230V /1. _____________56
8.17 Flow heater (E15), 1x230V /2. ___________________________58
8.18 Terminal block (X2), 1x230V /3.__________________________ 59
8.19 Electrical diagram tank (A2), 3x230V /1. _____________60
8.20 Flow heater (E15), 3x230V /2. ___________________________62
8.21 Terminal block (X2), 3x230V /3.__________________________ 63
8.22 HP cooling module schematic diagram
3x400V (A5)_____________________________________________________64
8.23 HP cooling module schematic diagram
1x230V/3x230V (A5) ________________________________________ 65
8.24 Expansion card (accessory) schematic diagram___66
8.25 Parts list__________________________________________________________68
8.26 Resistance values for sensor, cooling module______ 69
8.27 Resistance values for sensor, other ____________________ 70
9. Installation Communication _______________________________ 71
9.1 Install ethernet cable ________________________________________ 72
9.2 CTC Remote - Screen Mirroring_________________________ 73
9.3 MyUplink - App________________________________________________73
10. First start______________________________________________________________ 74
11. Operation and Maintenance ______________________________ 76
12. Detailed menu descriptions _______________________________ 77
12.1 Start menu ______________________________________________________77
12.2 Installation wizard_____________________________________________ 78
12.3 Heating/Cooling_______________________________________________ 79
12.4 DHW ______________________________________________________________81
12.5 Ventilation _______________________________________________________ 81
12.6 Weekly program_______________________________________________ 82
12.7 Operation data_________________________________________________ 84
Installer ___________________________________________________________________92
12.8 Display____________________________________________________________ 92
12.9 Settings __________________________________________________________94
12.10 Define ___________________________________________________________ 108
12.11 Service__________________________________________________________ 121
13. Troubleshooting/Appropriate measures_________ 126
13.1 Information messages ____________________________________ 128
13.2 Alarm messages ____________________________________________ 129
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.:

5CTC GSi 600
Congratulations on your new product
You have just purchased a CTCGSi600, with which we
hope you will be very pleased. Read about how you can
take care of your heat pump on the following pages.
Save this manual containing the installation and
maintenance instructions. If looked after properly, you
will be able to enjoy the use of your CTCGSi for many
years. This manual provides all the information you will
need.
The complete heat pump
CTC GSi is a complete heat pump able to meet the
heating and hot water requirements of your home. It has
a built-in, energy-efficient (A rated) circulation pump for
connection to the ground/bedrock circuit, i.e. the cold
side. This can be connected to either the left, right or
back of the heat pump, whichever suits you best.
CTC GSi has a control system which:
• monitors all heat pump functions.
• allows for individual settings;
• Displays desired values, such as temperatures,
operation times, energy consumption and fault
signals
• Facilitates the setting of values and
troubleshooting in a simple and well-structured
way
The built-in heat exchanger provides copious amounts
of hot water. CTC GSi also has a summertime basement
heating function and an underfloor heating blocking
function, which maximises the temperature supplied to
the floor circuits. Using the integrated night reduction
function, you can set and change the temperature in the
house throughout the day, from one day to the next.
Easily accessible electrical components and cooling
modules, along with effective troubleshooting functions
in the control program make CTCGSi easy to service.
If you want to supplement your CTC GSi with other
sources of heating, you can do this easily. We have
decided to call this option Energyflex. With Energyflex
you can, for example:
• Charge your heating circuit with solar energy.
• Allow a water-jacketed stove to contribute heat.
• Connect a pool heat exchanger to heat up a
swimming pool.
Eco design information can be downloaded from www.
ctc.se/ecodesign where the energy labelling stickers
can also be printed.
!NB: This installation manual
contains information about
technical data, operation,
installation, etc. Local regulations
or country-specific regulations
must be considered.
!
To benefit from our warranty and
CTC guarantee, the installation
certificate must be registered
online at ctc.se within 6 months of
the installation date.

6CTC GSi 600
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.
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.
!
If these instructions are not followed
during the installation, operation
and maintenance of the system,
Enertech’s liability under the applicable
warranty terms is not binding.

7CTC GSi 600
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

8CTC GSi 600
iThe set heating curve always takes priority. The room sensor can only increase
or decrease the heat beyond the set heating curve to a certain extent. Where
operating without a room sensor, the selected heating curve determines the
flow temperature supplied to the radiators.
The House Heating Curve
The heating curve is the central part of the product’s control system. It is the
heating curve which determines the compensated flow temperature requirements
for your property dependent upon the outdoor temperatures. It is important that
the heating curve is correctly adjusted, so that you achieve the best operation and
economy possible.
One property requires a radiator temperature of 30°C when the outdoor
temperature is 0°C, whilst a different property requires 40°C. The difference
between different properties is determined by the radiator surface area, the number
of radiators and how well insulated the house is.
Adjustment of Default Values for the Heating Curve
You define the heating curve yourself for your property by setting two values in
the product control system. This is achieved by selecting the options Inclination or
Adjustment under the "Installer/Settings/Radiator system" menu. Ask your installer
to help you set these values.
It is extremely important to set the heating curve and, in some cases, unfortunately,
this process may take several weeks. The best way of doing this, upon the initial
start-up, is to select operation without any room sensor. The system then operates
using the outdoor temperature reading and the property’s heating curve only.
During the adjustment period it is important that:
• the night reduction function is not selected.
• all thermostat valves on the radiators be fully opened. (This is to find the
lowest curve for the most economical use of the heat pump).
• the outdoor temperature is not higher than +5°C. (If the outdoor temperature
is higher when the system is installed, use the factory set curve until the
outdoor temperature falls to a suitable level).
• the radiator system is operational and correctly adjusted between different
circuits.
Your home’s heating settings

9CTC GSi 600
Adjusting the heating curve
The method described below can be used to adjust the heating curve correctly.
Adjustment if it is too cold indoors:
• If the outdoor temperature is lower than 0 degrees:
Increase the Inclination value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
• If the outdoor temperature is higher than 0 degrees:
Increase the Adjustment value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
Adjustment if it is too warm indoors:
• If the outdoor temperature is lower than 0 degrees:
Decrease the Inclination value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
• If the outdoor temperature is higher than 0 degrees:
Decrease the Adjustment value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
iIf the values set are too low, this may mean that the desired room temperature
is not being reached. You then need to adjust the heating curve, as necessary,
following the method shown above.
When the basic values have been set more or less correctly, the curve can
be finely adjusted directly using the Room temp. shown on the home menu
screen.
Appropriate Default Values
During installation you can seldom achieve a precise setting for the heating
curve instantly. In this case, the values given below may provide a good
starting point. Radiators with small heat-emission surfaces require a higher
primary flow temperature. You can adjust the gradient (heating curve
gradient) for your heating system under the "Installer/Settings/Radiator
system" menu.
Recommended values are:
Floor heating only Inclination 35
Low temperature system (well insulated houses) Inclination 40
Normal temperature system (factory setting) Inclination 50
High temperature system
(older houses, small radiators, poorly insulated) Inclination 60

10 CTC GSi 600
Examples of Heating Curves
You can see in the diagram below how the heating
curve changes with different Inclination settings. The
gradient of the curve shows the temperatures that the
radiators require at different outdoor temperatures.
Curve Inclination
The inclination value which is set is the primary flow
temperature when the outside temperature is –15°C.
Primary Flow Temperature
Primary Flow Temperature
Primary Flow Temperature
Outside Temperature
Outside Temperature
Heating off, out
Outside Temperature
Adjustment
The curve can be parallel displaced (adjusted) by
the desired number of degrees to adapt to different
systems/houses.
An example
Inclination 60°C
Adjustment 0°C
In this example, the maximum outgoing primary flow
temperature is set at 55°C.
The minimum permitted primary flow temperature is
27°C (e.g. summer-time basement heating or the floor
circuits in a bathroom).
Inclination 50°C
Adjustment +5°C
Inclination 50°C
Adjustment 0°C
Heating off, out

11CTC GSi 600
ºC
ºC
Summer-time operation
All properties have internal heat gains (lamps, oven,
body heat, etc.), which means that the heating can be
switched off when the outdoor temperature is lower
than the desired room temperature. The better insulated
the house is, the earlier the heating from the heat pump
can be switched off.
The example shows the product set at the default value
of 18°C. This value, "Heating off, outside", can be
changed in the "Advanced/Settings/Heat System"
menu.
In systems with a radiator pump, the radiator pump
stops when the heat is switched off. The heating starts
up automatically when it is required again.
Automatic or remote-controlled summer period
The factory setting causes "summer" to commence
automatically at 18ºC, as "Heating mode" is set to
"Auto".
Heating,mode Auto (Auto/On/Off)
Auto means automatic.
On means that the heating is on. For systems with
a mixing valve and a radiator pump, the mixing valve
operates to the primary flow setpoint and the radiator
pump is on.
Off means that the heating is switched off. For systems
with a radiator pump, the radiator pump is switched off.
Heating, ext. mode - (- /Auto/On/Off)
Facility for remote control of whether the heating is to be
on or off.
Auto means automatic.
On means that the heating is on. For systems with
a mixing valve and a radiator pump, the mixing valve
operates to the primary flow setpoint and the radiator
pump is on.
Off means that the heating is switched off. For systems
with a radiator pump, the radiator pump is switched off.
- No selection means no function when activated.
Heating upHeating up
Outside Temperature
Heating off, out
Primary Flow Temperature Heating
switched
off

12 CTC GSi 600
GSi 608 GSi 612 GSi 616
CTC No. 587303001 587304001 587307001
400 V 3N~ 50 Hz
kW 3.1 5.8 7.0
A13.3 24.9 23.8
kW 5.8 9 9 1)
kW 2.1 / 2.1 / 2.9 / 5.8 / 5.8 0.3 / 0.9 / 2.1 / 7.2 / 9 -/ 0.3 / 0.9 / 2.1 / 9 1)
A25
Ω0.18 2) 0.13 2)
IP X1
HP Keymark Cert. 012 012 012
GSi 608 GSi 612 / GSi 616
l 229
bar 3.0
°C 100
l/s 0.12 0.52
GSi 608 GSi 612 GSi 616
kW 7.7 11.8 16
@ 0/35 | 0/45 | 0/55 kW 6.08 I 5.68 I 5.24
@50 rps
6.08 I 5.68 I 5.24
@50 rps
10.52 I 9.58 I 8.90
@50 rps
@ 0/35 | 0/45 | 0/55 kW 1.27 I 1.54 I 1.78
@50 rps
1.27 I 1.54 I 1.78
@50 rps
2.34 I 2.80 I 3.27
@50 rps
COP 1) @ 0/35 | 0/45 | 0/55 - 4.78 I 3.68 I 2.95
@50 rps
4.78 I 3.68 I 2.95
@50 rps
4.50 I 3.43 I 2.72
@50 rps
@ 5/35 | 5/45 | 5/55 kW 7.1 I 6.65 I 6.36
@50 rps
7.1 I 6.65 I 6.36
@50 rps
12.26 I 11.22 I 10.55
@50 rps
COP 1) @ 5/35 | 5/45 | 5/55 - 5.62 I 4.26 I 3.57
@50 rps
5.62 I 4.26 I 3.57
@50 rps
5.07 I 3.87 I 3.14
@50 rps
SCOP 0/35 Pdesign cold climate 2) Pdesign = 7 kW,
SCOP = 5.6
Pdesign = 11 kW,
SCOP = 5.5
Pdesign = 16 kW,
SCOP = 5.5
SCOP 0/55 Pdesign cold climate 2) Pdesign = 7 kW,
SCOP = 4.2
Pdesign = 7 kW,
SCOP = 4.3
Pdesign = 16 kW,
SCOP = 4.2
SCOP 0/35 Pdesign average climate 2) Pdesign = 7 kW,
SCOP = 5.4
Pdesign = 10 kW,
SCOP = 5.4
Pdesign = 16 kW,
SCOP = 5.2
SCOP 0/55 Pdesign average climate 2) Pdesign = 7 kW,
SCOP = 4.2
Pdesign = 7 kW,
SCOP = 4.1
Pdesign = 16 kW,
SCOP = 4.0
Electrical data
Electrical data
Rated power
Rated current
Immersion heater (steps of 0,3 kW)
Max immersion heater output
@ fuse size 10 / 16 / 20 / 25 A
Fuse, max.
Max. permitted impedance at connection
Ingress Protection (IP)
Heating system
Water volume (V)
Max. operating pressure boiler (PS)
Max. temperature boiler (TS)
Heating system nominal flow @50 rps
Pressure drop See diagram in chapter "Pipe installation".
Operational data for heat pump
Max output from compressor
Output from compressor 1)
Input power 1)
1) EN14511:2018
2) SCOP according to FprEN14825
1) GSi 616: Max. 6 kW electric heater output in combination with compressor operation.
2) GSi 612 /GSi 616: Maximum permitted impedance at the mains connection according to EN 61000-3-12. If the impedance at the mains
connection is higher than the specified, check with the grid owner before purchasing the equipment.
1. Technical data
1.1 CTC GSi 600, 3x400 V

13CTC GSi 600
GSi
mm 28
mm 22
mm 22
mm 22
GSi 608 GSi 612 GSi 616
kg 2.4 2.4 2.2
ton 4.258 4.258 3.903
MPa 3.1
kg 275 / 304 275 / 304 278 / 307
mm 673 x 596 x 1876
mm 1940
dB(A) 34 / 34 39 / 41 42 / 42
GSi 608 GSi 612 / GSi 616
l 4.1
°C -5 / +20
bar 0.2/3.0
l/s 0.21 0.29
l/s 0.39
GSi
l 1.7
bar 10
°C 100
GSi 608 GSi 612 GSi 616
l 210 / 235 / 304
2.42(L) / 2.39(XL)
/ 2.21(XL)
2.57(L) / 2.47(XL)
/ 2.25(XL)
2.52(XL) / 2.38(XL)
/ 2.17(XL)
Other data
Refrigerant quantity (R407C, fluorinated
greenhouse gases GWP 1774)
CO2equivalent
Interrupt value switch HT
Weight with/without packaging
Dimensions (Depth x Width x Height)
Required ceiling height
Noise level (LWA) acc. to EN 12102 @ B0, W35/55
Brine system
Water volume (V)
Brine system min/max temp (TS)
Brine system min/max pressure (PS)
Brine system min flow
Brine system nominal flow, ∆t=3 K @50rps
Pump capacity See diagram in chapter "Pipe installation".
DHW system
Water volume (V)
Max operating pressure (PS)
Max operating temperature (TS)
DHW capacity according to. prEN16147 (Economic/Normal/Comfort)
DHW capacity
COP/ (Tapping cycle)
No annual leakage control of the refrigerant is required.
Pipe connections
Brine circuit, ext. diam. Cu piping (flexible hose)
Heating medium, ext. diam. Cu piping
Hot water supply, ext. diam.
Cold water supply, ext. diam.

14 CTC GSi 600
230V 1N~ 50 Hz 230V 3~ 50 Hz
kW 5.8 5.8
A 2.8 2.8
kW 5.5 7.05
A 25.2 25.2
IPX1 IPX1
Ω 0.18 0.18
Keymark Cert. No. 012-074 012-073
l 229
bar 3.0
°C 100
l/s 0.28
Wilo Yonos Para RS 25/7,5 PWM1 130
kW 12.5
@ 0/35 | 0/45 | 0/55 kW 5.81 I 5.46 I 5.23 @50 rps
@ 0/35 | 0/45 | 0/55 kW 1.30 I 1.56 I 1.87 @50 rps
COP 1) @ 0/35 | 0/45 | 0/55 - 4.48 I 3.49 I 2.79 @50 rps
@ 5/35 | 5/45 | 5/55 kW 6.62 I 6.27 I 6.09 @50 rps
COP 1) @ 5/35 | 5/45 | 5/55 - 5.22 I 3.95 I 3.20 @50 rps
SCOP 0/35 Pdesign cold climate 2) Pdesign = 10 kW, SCOP = 5.3
SCOP 0/55 Pdesign cold climate 2) Pdesign = 12 kW, SCOP = 4.0
SCOP 0/35 Pdesign average climate 2) Pdesign = 10 kW, SCOP = 5.1
SCOP 0/55 Pdesign average climate 2) Pdesign = 12 kW, SCOP = 3.9
Electrical data
Electrical data
Rated power
Max starting current
Immersion heater (steps of 0,3 kW)
Max. operating current Compressor
IP class
Maximum permitted impedance at connection*
Heating system
Water volume (V)
Max. operating pressure boiler (PS)
Max. temperature boiler (TS)
Heating system nominal flow @100 rps
Charge pump
Pressure drop See diagram in chapter "Pipe installation".
Operational data for heat pump
Max output from compressor
Output from compressor 1)
Input power 1)
1) EN14511:2013, incl. heat medium pump and brine pump
2) SCOP according to FprEN14825
* Maximum permitted impedance at the mains connection according to EN 61000-3-12. If the impedance at the
mains connection is higher than the specified, check with the grid owner before purchasing the equipment.
1.2 CTC GSi 612, 1x230 V, 3x230 V

15CTC GSi 600
mm 28
mm 22
mm 22
mm 22
kg 2.3
ton 4.802
MPa 4.4
kg 275 / 304
mm 673 x 596 x 1876
mm 1940
dB(A) 43/43
l 4.1
°C -5 / +20
bar 0.2/3.0
∆t=5 K @100rps l/s 0.32
∆t=3 K @50rps l/s 0.34
Grundfos UPMXL GEO 25-125
l 1.7
bar 10
°C 100
l 210 / 232 / 304
2.27 (L) / 2.40 (XL) / 2.34 (XL)
Other data
Refrigerant quantity (R410A, fluorinated
greenhouse gases GWP 2088)
CO2equivalent
Interrupt value switch HT
Weight with/without packaging
Dimensions (Depth x Width x Height)
Required ceiling height
Noise level (LWA) acc. to EN 12102 @ B0, W35/55
Brine system
Water volume (V)
Brine system min/max temp (TS)
Brine system min/max pressure (PS)
Brine system min flow
Brine system nominal flow
Brine pump
Pump capacity See diagram in chapter "Pipe installation".
DHW system
Water volume (V)
Max operating pressure (PS)
Max operating temperature (TS)
DHW capacity according to. prEN16147 Economic/Normal/Comfort
DHW capacity
COP/ (Tapping cycle)
No annual leakage control of the refrigerant is required.
Pipe connections
Brine circuit, ext. diam. Cu piping (flexible hose)
Heating medium, ext. diam. Cu piping
Hot water supply, ext. diam.
Cold water supply, ext. diam.

16 CTC GSi 600
-5
0
5
10
15
20
10
0
20
30
40
50
60
70
tw°C
tci °C
two
twi
two
twi
T f
T re
T re
-5
0
5
10
15
20
10
0
20
30
40
50
60
70
tw°C
tci °C
two
twi
two
twi
1.3.1 CTC GSi608/GSi612
1.3.2 CTC GSi616
1.3 Operating range CTC GSi
Operating range is based on normal operating conditions and may therefore be different in different
installations.
(tci = temperature brine in)
Primary flow temperature (two) °C
Return temperature (two) °C

17CTC GSi 600
1881
559
355
1833
631
673
517 39
55 125
106 137
52
299
442
264
298
596
Erfoderlig reshöjd: 1940mm
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
SJ
2020-03-25
CTC GSi 608 / 612 / 616
VP
CTC GSi 600
A 589300
JJ
blad 4/4
1881
559
355
1833
631
673
517 39
55 125
106 137
52
299
442
264
298
596
Erfoderlig reshöjd: 1940mm
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
SJ
2020-03-25
CTC GSi 608 / 612 / 616
VP
CTC GSi 600
A 589300
JJ
blad 4/4
1881
559
355
1833
631
673
517 39
55 125
106 137
52
299
442
264
298
596
Erfoderlig reshöjd: 1940mm
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
SJ
2020-03-25
CTC GSi 608 / 612 / 616
VP
CTC GSi 600
A 589300
JJ
blad 4/4
3
5
2
6
14
1. Cold water Ø22
2. DHW Ø22
3. Return Ø22
4. Primary flow Ø22
5. Expansion connection/ Lifting sleeve G 3/4"
6. Bleed valve connection G 1/2"
1.4 Measurements

18 CTC GSi 600
DHW connections
The property’s DHW
connections are connected
here.
Radiator connections
The property’s heating
system is connected here.
DHW heat exchanger
The heat pump is equipped
with a stainless steel heat
exchanger.
Direct heating of hot water
minimises the risk of
legionella bacteria.
Flow heater
There is an electric heater for
additional heating here.
3-way valve
Flow conditioner.
Terminal block for sensors
The sensor terminal block
is wired internally. Outdoor
sensors, room sensors and
other sensors are connected
easily here.
Display (A1)
Junction box (A5)
Module
Max. thermostat
(F10)
Charge pump (G11)
Pump for the hot side
(concealed, placed behind
the electrical connection
box).
Brine pump (G20)
Circuit breakers (F2)
Circuit breakers (F1)
Junction box
(A2)
Brine connections
The brine is connected to
the collector here.
2. Design
The picture below shows the fundamental construction of the heat pump.
The energy in the bore hole (bedrock) or 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.
Circulation pump, DHW
Charge pump (G5) for
DHW out temp.

19CTC GSi 600
3. Parameter list
Factory
setting
Heating circuit
Max primary flow °C 60
Min primary flow °C Off
Heating, mode Auto
Heating mode, ext.
Heat mode, schedule
Heat off, outside °C 18
Heating off, time 120
Inclination 50
Inclination adjustment 0
Night reduction down to °C 5
Room temp. lowered, Night
reduction°C
-2
Room temp. lowered, Holiday -2
Primary flow reduced, Night
reduction°C
-3
Primary flow reduced, Holiday -3
Alarm room temp °C 5
SmartGrid Low Price °C 1
SmartGrid Overcapacity °C 2
Max time heating 20
Charge pump % 90
Drying period mode Off
Drying period temp °C 25
Drying period mode Off
Heat pump
Compressor Blocked
Brine pump Auto
Compressor stop at brine °C -5
Tariff HP No
Tariff HP schedule
SmartGrid block HP No
Start at degree minute -60
Max rps (GSi 608/612/616) 65/100/80
Ext. Noise reduction rps 50
Noise reduction, schedule
Passive cooling brine pump on Yes
Factory
setting
Electric heater
Max el. heater kW* 9.0
Max el. heater DHW kW 0
Start at degree minute -500
Diff step, degree minute -50
Main fuse A 20
Conv. factor current sensor 1
Tariff EL No
Tariff EL schedule
SmartGrid block immersion No
DHW
DHW program Economy/
Normal/
Comfort
Max time DHW 30
Charge pump % 90
SmartGrid Low Price °C 10
SmartGrid Overcapacity °C 10
Run time DHW circ. 4
Time DHW circ. 15
DHW circ. schedule
Time Extra DHW Remote Contr. 0.0
HC2 Mixing valve close 120
External heat source (EHS)
Charge start °C 70
Stop diff (°C) 5
SmartGrid block cap. No
Passive cooling
Room temperature passive cooling
°C
25.0
SmartGrid Low Price °C 1
SmartGrid Overcapacity °C 2
Ext. block passive cooling Off
Block passive cooling schedule
*The setting range ("Max electric heater power") varies
depending on the heat pump model. See the “Electrical
installation” chapter.

20 CTC GSi 600
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.
• Avoid placing the heat pump in rooms where the walls are of
lightweight design, as people in the adjoining room may be disturbed
by the compressor and vibrations.
• 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.
Disposal of the product as household waste is not permitted.
• It is very important that the product’s refrigerant, compressor oil and
electric/electronic components are disposed of correctly.
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