CTC Union CombiAir 6-UK 1x230V User manual

User manual
LEK
LEK
LEK
UN
CTC CombiAir
6, 8, 12, 16 – UK 1x230V
Air/water heat pump
UHB EN 2024-1
16230562

Table of Contents
41 Important information
4Installation data
5Safety information
6Symbols
6Marking
7Serial number
8Country specific information
11CTC CombiAir – An excellent choice
122 The heat pump – the heart of the house
12Heat pump function
14Control of CTC CombiAir
15Maintenance of CTC CombiAir
203 Disturbances in comfort
20Troubleshooting
214 Technical data
225 Glossary
26Item register
27Contact information
3CTC CombiAirTable of Contents |

1 Important information
Installation data
CTC CombiAirProduct
Serial number
Installation date
Installer
Always state the serial number.
Certification that the installation is carried out according to instructions
in CTC's installer manual and applicable regulations.
_________________________Signed__________________Date
CTC CombiAirChapter 1 | Important information4

Safety information
This appliance can be used by children aged from 8
years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience
and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe
way and understand the hazards involved. Children
shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without
supervision.
Rights to make any design or technical modifications
are reserved.
CTC CombiAir must be installed via an isolator switch.
The cable area has to be dimensioned based on the fuse
rating used.
If the supply cable is damaged, only CTC, its service rep-
resentative or similar authorised person may replace it
to prevent any danger and damage.
5
CTC CombiAirChapter 1 | Important information

Symbols
NOTE
This symbol indicates danger to person or machine .
Caution
This symbol indicates important information about what you should
observe when maintaining your installation.
TIP
This symbol indicates tips on how to facilitate using the product.
Marking
The CE mark is obligatory for most products sold in the EU, regardless
of where they are made.
CE
Classification of enclosure of electro-technical equipment.IP24
Danger to person or machine.
!
Read the User Manual.
Read the Installer Manual.
CTC CombiAirChapter 1 | Important information6

Serial number
The serial number for CTC CombiAir can be found on the side of the foot.
LEK
D ATA
Serial number
Caution
You need the product's (12 digit) serial number for servicing and support.
7CTC CombiAirChapter 1 | Important information

Country specific information
United Kingdom
This installation is subject to building regulation approval, notify the local
Authority of intention to install.
Use only manufacturer’s recommended replacement parts.
For more information see www.ctc-heating.com.
Benchmark places responsibilities on both manufacturers and installers.
The purpose is to ensure that customers are provided with the correct
equipment for their needs, that it is installed, commissioned and serviced
in accordance with the manufacturers instructions by competent persons
and that it meets the requirements of the appropriate Building Regulations.
The Benchmark Checklist can be used to demonstrate compliance with
Building Regulations and should be provided to the customer for future
reference.
Installers are required to carry out the installation, commissioning and
servicing work in accordance with the Benchmark Code of practice which
is available from the Heating and Hotwater Industry Council who manage
and promote the Scheme. Visit centralheating.co.uk for information.
CTC CombiAirChapter 1 | Important information8

Warranty and insurance information
Thank you for installing a new CTC heat pump in your home.
CTC heat pumps are manufactured in Sweden to the very highest standard
so we are pleased to offer our customers a comprehensive guarantee.
The product is guaranteed for 24 months for parts and labour from the
date of installation or 33 months from the date of manufacture, whichever
is the shorter.
The CTC guarantee is based on the unit being installed and commissioned
by a CTC accredited installer, serviced every year and the Benchmark doc-
uments completed. Where this condition is not met, any chargeable spare
parts or components issued within the applicable guarantee period still
benefit from a 12 month warranty from the date of issue by the manufac-
turer.
We recommend the installer completes and returns as soon as possible,
your guarantee registration card or completes the guarantee form on the
CTC www.ctc-heating.com.
Please ensure that the installer has fully completed the Benchmark
Checklist in the end of the Installation Instructions supplied with the
product and that you have signed to say that you have received a full and
clear explanation of its operation. The installer is legally required to com-
plete a commissioning checklist as a means of complying with the appro-
priate Building Regulations (England and Wales).
All installations must be notified to Local Area Building Control either
directly or through a Competent Persons Scheme. A Building Regulations
Compliance Certificate will then be issued to the customer who should,
on receipt, write the Notification Number on the Benchmark Checklist.
This product should be serviced regularly to optimise its safety, efficiency
and performance. The service engineer should complete the relevant
Service Record on the Benchmark Checklist after each service.
The Benchmark Checklist may be required in the event of any warranty
work and as supporting documentation relating to home improvements
in the optional documents section of the Home Information Pack.
9
CTC CombiAirChapter 1 | Important information

Electrical Supply
The heat pump must be permanently connected to a 230V AC 50Hz supply.
All system components shall be of an approved type and all wiring to
current I.E.E wiring regulations.
External wiring must be correctly earthed, polarised and in accordance
with the relevant standards: Currently this is BS 7671.
Heating System
The installation of the heat pump should follow best practice as covered
in the following:
BS 5449 Forced circulation hot water central heating systems for domestic
premises.
BS 15450 Heating systems in buildings – Design of heat pump heating
systems.
CTC CombiAirChapter 1 | Important information10

CTC CombiAir – An excellent choice
CTC CombiAir is an air/water heat pump, specially designed for the Nor-
dic climate, which uses the outdoor air as its energy source.
The heat pump is intended for connection to water borne heating systems
and can both heat hot water effectively at high outdoor temperatures
and give a high output to the heating system at low outdoor temperatures.
If the outdoor temperature drops to a level below the stop temperature
all heating must then occur with external additional heat.
Excellent properties for CTC CombiAir :
႑Efficient twin rotary compressor
Efficient twin rotary compressor that operates at temperatures down
to -20 °C.
႑Intelligent control
CTC CombiAir connected to intelligent control for optimum control of
the heat pump.
႑Fan
CTC CombiAir has automatic capacity regulation of the fan.
႑Long service life
The material has been chosen for a long service life and is designed to
withstand the Nordic outdoor conditions.
The material has been chosen for a long service life.
႑Silent operation
CTC CombiAir has a silent operation function that allows scheduling of
when CTC CombiAir will operate at an even quieter noise level.
11
CTC CombiAirChapter 1 | Important information

2 The heat pump – the heart of
the house
Heat pump function
Förångare
Kondensor 80 °C
2 °C-3 °C
5 °C0 °C
55 °C45 °C
Expansionsventil Kompressor
A
D
F
H
I
B
C
E
G+HDWLQJPHGLXP%ULQH5HIULJHUDQW(YDSRUDWRU&RQGHQVHU([SDQVLRQYDOYH&RPSUHVVRU+HDWVRXUFHThe temperatures are only examples and may vary between different installations and
time of year.
CTC CombiAirChapter 2 | The heat pump – the heart of the house12

An air/water heat pump can use the outdoor air to heat up a home. The
conversion of the outdoor air’s energy to residential heating occurs in
three different circuits. In the brine circuit, (1) , free heat energy is retrieved
from the surroundings and transported to the heat pump. The heat pump
increases the retrieved heat’s low temperature to a high temperature in
the refrigerant circuit, (2) . The heat is distributed around the building by
the heating medium circuit, (3) .
Outdoor air
The outdoor air is sucked into the heat pump.
A
The fan then routes the air to the heat pump’s evaporator. Here, the air
releases the heating energy to the refrigerant and the air's temperature
drops. The cold air is then blown out of the heat pump.
B
Refrigerant circuit
A gas circulates in a closed system in the heat pump, a refrigerant, which
also passes the evaporator. The refrigerant has a very low boiling point. In
the evaporator the refrigerant receives the heat energy from the outdoor
air and starts to boil.
C
The gas that is produced during boiling is routed into an electrically
powered compressor. When the gas is compressed, the pressure increases
and the gas’s temperature increases considerably, from approx. 5 °C to
approx. 80 °C.
D
From the compressor, gas is forced into a heat exchanger, condenser,
where it releases heat energy to the heating system in the house,
whereupon the gas is cooled and condenses to a liquid form again.
E
As the pressure is still high, the refrigerant can pass an expansion valve,
where the pressure drops so that the refrigerant returns to its original
temperature. The refrigerant has now completed a full cycle. It is routed
to the evaporator again and the process is repeated.
F
Heat medium circuit
The heat energy that the refrigerant produces in the condenser is retrieved
by the climate system's water, heating medium, which is heated to 55 °C
(supply temperature).
G
The heating medium circulates in a closed system and transports the heated
water's heating energy to the house water heater and radiators/heating
coils.
H
The temperatures are only examples and may vary between different installations and
time of year.
13CTC CombiAirChapter 2 | The heat pump – the heart of the house

Control of CTC CombiAir
CTC CombiAir is controlled in different ways depending on your system.
You control the heat pump via your indoor module (CTC EcoZenith i360
H/L ) or control module (CTC EcoLogic M, L). See the relevant manual for
more information.
During installation, the installation engineer adjusts the necessary settings
for the heat pump in the indoor module or control module, so that the
heat pump works optimally in your system.
CTC CombiAirChapter 2 | The heat pump – the heart of the house14

Maintenance of CTC CombiAir
Regular checks
When your heat pump is located outdoors some external maintenance is
required.
NOTE
Insufficient maintenance can cause serious damage to CTC CombiAir ,
which is not covered by the guarantee.
Checking grilles and bottom panel
Check that the inlet grille is not clogged by leaves, snow or anything else
regularly throughout the year.
You should be vigilant during windy conditions and/or in the event of
snow as the grilles can become blocked.
Also check that drain holes in the bottom panel are free from dirt and
leaves.
Regularly check that condensation is routed away correctly through the
condensation pipe. Ask your installer for assistance if required.
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Prevent snow building up and covering the grille on CTC CombiAir .
15
CTC CombiAirChapter 2 | The heat pump – the heart of the house

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Keep free of snow and/or ice.
Cleaning the outer casing
If necessary the outer casing can be cleaned using a damp cloth.
Care must be exercised so that the heat pump is not scratched when
cleaning. Avoid spraying water into the grilles or the sides so that water
penetrates into CTC CombiAir . Prevent CTC CombiAir coming into contact
with alkaline cleaning agents.
In event of long power cuts
In the event of prolonged power failures it is recommended that the part
of the heating system located outdoors is drained. Your installer has in-
stalled a shut off and drain valve to facilitate this. Call and ask your installer
if you are unsure.
Silent operation
The heat pump can be set to "silent operation", which reduces the heat
pump’s noise level. The function is useful when CTC CombiAir must be
placed in noise-sensitive areas. The function should only be used for limited
periods, because CTC CombiAir might not reach its dimensioned power.
Saving tips
Your heat pump installation produces heat and cooling and/or hot water.
This occurs via the control settings you made.
Factors that affect the energy consumption include indoor temperature,
hot water consumption, the insulation level of the house and whether the
house has many large windows. The position of the house, e.g. if it is very
exposed to wind, is also an influencing factor.
Also remember:
CTC CombiAirChapter 2 | The heat pump – the heart of the house16

႑Open the thermostat valves completely (except in the rooms that are to
be kept cooler for various reasons, e.g. bedrooms). The thermostats slow
the flow in the heating system, which the heat pump wants to com-
pensate with increased temperatures. It then works harder and consumes
more electrical energy.
႑Reduce or adjust the settings for heating in any external control systems.
Power consumption
jan feb mars april maj juni juli aug sep okt nov dec
0%
5%
10%
15%
20%
25%
The air/water heat pump's energy distribution spread across the year
Month
Jan Feb Mar April May June July Aug Sep Oct Nov Dec
% of annual
consumption
Increasing the indoor temperature one degree increases power consump-
tion by approx. 5%.
Domestic electricity
In the past it has been calculated that an average Swedish household has
an approximate annual consumption of 5000 kWh domestic electri-
city/year. In today's society it is usually between 6000-12000 kWh/year.
Appr.
ann.
con-
sump
(kWh)
Normal Output
(W)
Equipment
StandbyOpera-
tion
3802200TV (Operation: 5 h/day, Standby: 19 h/day)
901011Digital box (Operation: 5 h/day, Standby:
19 h/day)
45515DVD (Operation: 2 h/week)
672160TV games console (Operation: 6 h/week)
17
CTC CombiAirChapter 2 | The heat pump – the heart of the house

Appr.
ann.
con-
sump
(kWh)
Normal Output
(W)
Equipment
50140Radio/stereo (Operation: 3 h/day)
1202100Computer incl. screen (Operation: 3 h/day,
standby 21 h/day)
175-60Bulb (Operation 8 h/day)
58-20Spot light, Halogen (Operation 8 h/day)
165-100Cooling (Operation: 24 h/day)
380-120Freezer (Operation: 24 h/day)
365-1500Stove, hob (Operation: 40 min/day)
310-3000Stove, oven (Operation: 2 h/week)
730-2000Dishwasher, cold water connection (Opera-
tion 1 time/day)
730-2000Washing machine (Operation: 1 times/day)
730-2000Tumble drier (Operation: 1 times/day)
100-1000Vacuum cleaner (Operation: 2 h/week)
50-400Engine block heater (Operation: 1 h/day, 4
months a year)
100-800Passenger compartment heater (Operation:
1 h/day, 4 months a year)
These values are approximate example values.
Example: A family with 2 children live in a house with 1 TVs, 1 digital boxes,
1 DVD players, 1 TV games console, 2 computers, 3 stereos, 2 bulbs in the
WC, 2 bulbs in the bathroom, 4 bulbs in the kitchen, 3 bulbs outside, a
washing machine, tumble drier, dishwasher, fridge, freezer, oven, vacuum
cleaner, engine block heater = 6240 kWh domestic electricity/year
Energy meter
Check the accommodation's energy meter regularly, preferably once a
month. This will indicate any changes in power consumption.
Newly built houses usually have twin energy meters, use the difference to
calculate your domestic electricity.
CTC CombiAirChapter 2 | The heat pump – the heart of the house18

New builds
Newly built houses undergo a drying out process for a year. The house
can then consume significantly more energy than it would thereafter.
After 1-2 years the heating curve should be adjusted again, as well as the
offset heating curve and the building's thermostat valves, because the
heating system, as a rule, requires a lower temperature once the drying
process is complete.
19
CTC CombiAirChapter 2 | The heat pump – the heart of the house

3 Disturbances in comfort
Troubleshooting
NOTE
Work behind covers secured by screws may only be carried out by, or
under the supervision of, a qualified installation engineer.
Basic actions
႑Make sure that the air flow to CTC CombiAir is not blocked by foreign
objects.
႑Check that CTC CombiAir does not have any external damage.
Ice build-up in the fan, grille and/or fan cone on
CTC CombiAir
If problems arise, contact your installer.
Water below CTC CombiAir (larger amount)
Check that the water drainage via the condensation pipe (KVR 10) is
working.
CTC CombiAirChapter 3 | Disturbances in comfort20