CTC Union CombiAir MR User manual

User manual
CTC CombiAir MR
UK 1x230V
Air/water heat pump
UHB EN 2250-1
16260531

Table of Contents
41 Important information
4Installation data
4Symbols
5Serial number
5Country specific information
62 Installation function
83 Control of CTC CombiAir MR
94 Maintenance of CTC CombiAir MR
9Regular checks
9In event of long power cuts
9Silent operation
9Updating the software
105 Disturbances in comfort
10Troubleshooting
11Contact information
3Table of Contents |CTC CombiAir MR

Installation data
CTC CombiAir MRProduct
Serial number
Installation date
Installer
Accessories
Serial number must always be given.
Certification that the installation is carried out according to instructions in the accompanying installer manual and applicable regulations.
_________________________Signed__________________Date
Symbols
Explanation of symbols that may be present in this
manual.
NOTE
This symbol indicates danger to person or ma-
chine.
Caution
This symbol indicates important information
about what you should observe when maintain-
ing your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
CTC CombiAir MRChapter 1 | Important information4
1 Important information

Serial number
The serial number for CTC CombiAir MR can be found
on the side of the foot.
DATA
Caution
You need the product's (12 digit) serial number
for servicing and support.
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.
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 documents completed.
Where this condition is not met, any chargeable spare
parts or components issued within the applicable guar-
antee period still benefit from a 12 month warranty from
the date of issue by the manufacturer.
We recommend the installer completes and returns as
soon as possible, your guarantee registration card or
completes the guarantee form on the CTC website,
www.ctc-heating.com.
Please ensure that the installer has fully completed the
Benchmark Checklist in the end of the Installation Instruc-
tions 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 appropriate 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 re-
ceipt, 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 docu-
ments section of the Home Information Pack.
5Chapter 1 | Important informationCTC CombiAir MR

An air/water heat pump installation uses the outdoor
air to heat up a home. The conversion of the outdoor
air’s energy into residential heating occurs in three dif-
ferent circuits. From the outdoor air, (1) , free heat energy
is retrieved 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 in the heating
medium circuit, (3) .
45 ºC
55 ºC
80 ºC 5 ºC
6 ºC
1 ºC
0 ºC
A
BC
F
EG
H
ID
123
Heating medium
Refrigerant
Outdoor air
Compressor
Condenser
Evaporator
Expansion valve
The temperatures are only examples and may vary between different installations and time of year.
CTC CombiAir MRChapter 2 | Installation function6
2 Installation function

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 en-
ergy 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 evap-
orator. 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 0 °C to approx 80 °C.
D
From the compressor, gas is forced into a heat
exchanger, condenser, where it releases heat en-
ergy to the indoor module, 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 tem-
perature. 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 indoor module's
water, the 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 heat energy to
the house radiators/heating coils.
H
The indoor module’s hot water.
I
7Chapter 2 | Installation functionCTC CombiAir MR

CTC CombiAir MR is controlled in different ways, depend-
ing 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 Installer Manual for the indoor module/control
module.
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 CombiAir MRChapter 3 | Control of CTC CombiAir MR8
3 Control of CTC CombiAir MR

Regular checks
When your heat pump is located outdoors some external
maintenance is required.
NOTE
Insufficient maintenance can cause serious
damage to CTC CombiAir MR, which is not
covered by the guarantee.
Checking grilles and bottom panel on
CTC CombiAir MR
Check regularly throughout the year that the grille is not
clogged by leaves, snow or anything else.
You should be particularly vigilant during windy condi-
tions and/or in the event of snow, as the grille can be-
come blocked.
Also check that the drain holes in the bottom panel are
free from dirt and leaves.
Regularly check that condensation is routed away cor-
rectly through the condensation pipe. Ask your installer
for assistance if required.
Keep free of snow and ice
LEK
Prevent snow building up and covering the grille on CTC CombiAir
MR.
LEK
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 MR. Prevent CTC CombiAir MR coming
into contact with alkaline cleaning agents.
In event of long power cuts
In the event of prolonged power failures, it is recommen-
ded that the part of the heating system located outdoors
is drained. This is made easier if shut-off and draining
valves are installed. Ask you 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 MR must be placed in noise-
sensitive areas. The function should only be used for
limited periods, because CTC CombiAir MR might not
reach its dimensioned power.
Updating the software
For information about updates and display settings, see
the manual for the controlling product.
9Chapter 4 | Maintenance of CTC CombiAir MRCTC CombiAir MR
4 Maintenance of CTC CombiAir MR

In most cases, the indoor module/control module notes
a malfunction (a malfunction can lead to disturbance in
comfort) and indicates this with alarms and action instruc-
tions in the display.
NOTE
Work behind covers secured by screws may
only be carried out by, or under the supervision
of, a qualified installation engineer.
Troubleshooting
If the operational interference is not shown in the display
the following tips can be used:
Basic actions
■Group and main fuses of the accommodation.
■The property's earth circuit breaker.
■Make sure that the air flow to CTC CombiAir MR is not
blocked by foreign objects.
■Check that CTC CombiAir MR does not have any extern-
al damage.
Ice build-up in the fan, grille and/or fan cone
If problems arise, contact your installer.
Water below CTC CombiAir MR (larger
amount)
Check that the water drainage via the condensation pipe
(KVR) is working.
CTC CombiAir MRChapter 5 | Disturbances in comfort10
5 Disturbances in comfort

WS name: -Gemensamt
WS version: a1023
WS release date: 2022-10-18 09:03
Publish date: 2022-12-05 08:12
Enertech AB
P.O Box 309
SE-341 26
Ljungby, Sweden
www.ctc-heating.com
16260531