CTC Union CombiAir 6MR User guide

Installer manual
CTC CombiAir MR
UK 1x230V
Air/water heat pump
IHB EN 2250-1
16260530

Table of Contents
41 Important information
4Safety information
4Symbols
4Marking
4Serial number
5Country specific information
6Inspection of the installation
7
Compatible indoor modules and control mod-
ules
7Indoor modules
7Control modules
82 Delivery and handling
8Transport
8Assembly
10Condensation
11Supplied components
12Dismantling panels
133 The heat pump design
13General
17Electrical connection
19Sensor placement
224 Pipe connections
22General
23Symbol key
23Pipe coupling heating medium circuit
24Installation alternative
255 Electrical connections
25General
25Accessibility, electrical connection
26Connections
306 Commissioning and adjusting
30Preparations
30Filling and venting
30Compressor heater
31Start-up and inspection
31Readjusting, heating medium side
31Adjustment, charge flow
327 Control
338 Service
33Temperature sensor data
359 Servicing and maintenance
35Important
35General inspection
35Heating System
3610 Disturbances in comfort
36Troubleshooting
37Alarm list
3811 Accessories
38Ground stand
38Wall bracket
38Condensation water pipe - KVR
3912 Technical data
39Dimensions
41Sound levels
42Technical specifications
46Energy labelling
49Electrical circuit diagram
53Item register
59Contact information
3Table of Contents |CTC CombiAir MR

Safety information
This manual describes installation and service procedures
for implementation by specialists.
The manual must be left with the customer.
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 consider when in-
stalling or servicing the installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
Explanation of symbols that may be present on the
product’s label(s).
Fire hazard!
Read the User Manual.
Read the User Manual.
Read the Installer Manual.
Serial number
The serial number for CTC CombiAir can be found on
the side of the foot.
DATA
Caution
You need the product's (12 digit) serial number
for servicing and support.
CTC CombiAir MRChapter 1 | Important information4
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 accord-
ance with the manufacturers instructions by competent
persons and that it meets the requirements of the appro-
priate 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, com-
missioning 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.
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.
Electrical Supply
The heat pump must be permanently connected to a
230 V ~ 50 Hz 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.
5Chapter 1 | Important informationCTC CombiAir MR

Inspection of the installation
Current regulations require the heating installation to be inspected before it is commissioned. The inspection must
be carried out by a suitably qualified person. Fill in the page for information about installation data in the User
manual.
DateSignatureNotesDescription
✔
Heating medium (page 23)
System flushed
System vented
Particle filter
Shut-off and drain valve
Charge flow set
Electricity (page 25)
Fuses property
Safety breaker
Earth circuit-breaker
Heating cable type/effect
Fuse size, heating cable (F3)
Communication cable connected
CTC CombiAir addressed (only when cas-
cade connection)
Connections
Main voltage
Phase voltage
When installing CTC CombiAir, check the
software version of the indoor mod-
ule/control module.
Miscellaneous
Warranty
Benchmark checklist
CTC CombiAir MRChapter 1 | Important information6

Compatible indoor modules and control modules
Indoor modules
CTC EcoZenith i360 H/L
3x400 V,3x230 V, 1x230 V
Control modules
CTC EcoLogic M, L
1x230 V
7Chapter 1 | Important informationCTC CombiAir MR

Transport
CTC CombiAir should be transported and stored vertically
in a dry place.
NOTE
Ensure that the heat pump cannot fall over
during transport.
Check that CTC CombiAir has not been damaged during
transport.
Lift from the street to the set up location
If the surface allows, the easiest method is to use a pallet
truck to move the heat pump to the installation area.
If the heat pump needs to be transported across soft
ground, such as a lawn, we recommend using a crane
truck that can lift it to the installation location. When
the heat pump is lifted with a crane, the packaging must
be intact.
If a crane truck cannot be used, the heat pump can be
transported on an extended sack truck. The heat pump
must be taken hold of from its heaviest side and two
people are required to lift it.
Lift from the pallet to final positioning
Before lifting remove the packaging and the securing
strap to the pallet.
Place lifting straps around each foot. It is recommended
that two people perform the lift from the pallet to the
base.
Scrapping
When scrapping, remove the heat pump in reverse order.
In this case, lift by the base plate rather than the pallet!
Assembly
■Place the heat pump in a suitable location outdoors
to prevent any risk of the refrigerant flowing in
through ventilation openings, doors or similar open-
ings in the event of a leak. It must also not constitute
a hazard to people or property in any other way.
■If the heat pump is placed in a location where any re-
frigerant leak could accumulate, for example below
ground level (in a dip or low-lying recess), the installa-
tion must satisfy the same requirements that apply for
gas detection and the ventilation of engineering
rooms. Requirements regarding sources of ignition
must be applied where appropriate.
■Place CTC CombiAir outdoors on a solid level base that
can take the weight, preferably a concrete foundation.
If concrete slabs are used they must rest on asphalt or
shingle.
■The lower edge of the evaporator must not be lower
than the level of the average local snow depth, or at
least 300 mm above ground level. The base should be
at least 70 mm tall.
■CTC CombiAir should not be positioned next to noise
sensitive walls, for example, next to a bedroom.
■Also ensure that the placement does not inconveni-
ence the neighbours.
■CTC CombiAir must not be placed so that recirculation
of the outdoor air is possible. Recirculation entails re-
duced power and impaired efficiency.
■The evaporator must be sheltered from direct wind / ,
which negatively affects the defrosting function. Place
CTC CombiAir protected from wind / against the
evaporator.
■Large amounts of condensation, as well as melt water
from defrosting, may be produced. Condensation must
be led off to a drain or similar (see section “Condensa-
tion water").
■Care must be exercised so that the heat pump is not
scratched during installation.
LEK
LEK
min 300 mm
Min. 300 mm
Do not place CTC CombiAir directly on the lawn or other
non solid surface.
CTC CombiAir MRChapter 2 | Delivery and handling8
2 Delivery and handling

If there is a risk of snow slip from roof, a protective roof
or cover must be erected to protect the heat pump, pipes
and wiring.
9Chapter 2 | Delivery and handlingCTC CombiAir MR

Installation area
The distance between CTC CombiAir and the house wall must be at least 150 mm. The free space above CTC CombiAir
must be at least 1,000 mm. The free space in front must be at least 1,000 mm for future servicing.
150 mm
Fritt utrymme bakom
Min. avstånd
vid användning
av flera F2040
600 mm
3000 mm
400 mm 600 mm
Minimalt
fritt utrymme
Minimalt
fritt utrymme
Fritt utrymme
framför
Free space behind
Min. distance when using
several CTC CombiAir
Free space Free space
Free space in
front
1000 mm
Condensation
The condensate drain pan collects and leads away the
condensation water.
NOTE
It is important to the heat pump function that
condensation water is led away and that the
drain for the condensation water run off is not
positioned so that it can cause damage to the
house.
Condensation run-off should be checked regu-
larly, especially during the autumn. Clean if
necessary.
■The condensation water (up to 50 litres / 24 hrs) must
be routed away by a pipe to an appropriate drain, it is
recommended that the shortest outdoor length pos-
sible is used.
■The section of the pipe that can be affected by frost
must be heated by the heating cable to prevent
freezing.
TIP
Pipe with heating cable for draining the
condensation water trough is not included.
■Route the pipe downward from the heat pump.
■The outlet of the condensation water pipe must be at
frost free depth.
■Use a water trap for installations where air circulation
may occur in the condensation water pipe.
■The insulation must seal against the bottom of the
condensation water trough.
Drain pan heater, control
The drain pan heater is supplied with power when one
of the following conditions is met:
1. The compressor has been in operation for at least
30 minutes after last start.
2. The ambient temperature is lower than 1 °C.
Drainage of condensation
Stone caisson
LEK
Frostfritt djup
Frost proof depth
If the house has a cellar the stone caisson must be posi-
tioned so that condensation water does not affect the
house. Otherwise the stone caisson can be positioned
directly under the heat pump.
CTC CombiAir MRChapter 2 | Delivery and handling10

Gutter drainage
Frostfritt
djup
LEK
Frost proof depth
Water seal
Route the pipe sloping downward from the heat pump.
The condensation water pipe must have a water seal to
prevent air circulation in the pipe.
Caution
If none of the recommended alternatives is
used good lead off of condensation water must
be assured.
Supplied components
1 x communication cable
1 x filterball (G1") (QZ2)
1 x termination resistor
LEK
2 x flexible pipes (DN25,
G1") with 4 x gaskets
11Chapter 2 | Delivery and handlingCTC CombiAir MR

Dismantling panels
Dismantling top panel
CTC CombiAir 6MR
UN
CTC CombiAir 10MR
LEK
Removing the front panel
CTC CombiAir 6MR
UN
CTC CombiAir 10MR
LEK
CTC CombiAir MRChapter 2 | Delivery and handling12

General
CTC CombiAir 6MR
UN
GQ1
DH
EP1
EB11
CM
20S
63H1
LPT
SM2
SM1
PF3
GQ10
QN1
QM36
QM37
CH
EB10
BT17
FM01
HS1
BT15
QN2
AA23
BT12
BP1
X1
BP2
BP4
BT3
QN3
EP2
UB3
TBFPWB1
RF2
RF3
DATA
UB3
W1
UB1
UB2
XL1
XL2
DATA
PF3
BT28
Tho-R1
Tho-R1
PF1
BT16
Tho-A
BT16
13Chapter 3 | The heat pump designCTC CombiAir MR
3 The heat pump design

Tho-A
CM
SM2
QN1
CH
EB10
GQ10
20S
63H1
LPT
SM1
Tho-SBT17
BT15
QN2
BT12
QN1
BP2
BP4
BT3
QN3
BT28
HS1
UB3
EP2
QM36
QM37
Tho-DBT14
CTC CombiAir MRChapter 3 | The heat pump design14

CTC CombiAir 10MR
LEK
GQ1
DH
UB3
EP1
EB11
CM
20S
63H1
LPT
SM2
SM1
FM01
PWB2 PWB3 PWB1
BT12
BT15
BP4
QN2
BT3
PF3
HS1
EP2
GQ10 QN1
BP2
QM36
QM37
BP1
QN3
CH
EB10
AA23
X1
F TBBT14 Tho-D
Tho-SBT17
LEK
DATA
XL2
UB1
UB2
W1
XL1
UB3
LEK
DATA
PF1PF3
Tho-A
BT28
Tho-R1 Tho-R2
BT16
15Chapter 3 | The heat pump designCTC CombiAir MR

Pipe connections
Heating medium connection, supply (from
CTC CombiAir)
XL1
Heating medium connection, return (to
CTC CombiAir)
XL2
Sensors etc.
High pressure pressostatBP1 (63H1)
Low pressure transmitterBP2 (LPT)
High pressure sensorBP4
Temperature sensor, returnBT3
Temperature sensor, condenser supply lineBT12
Temperature sensor, hot gasBT14 (Tho-
D)
Temperature sensor, fluid pipeBT15
Temperature sensor 1, evaporatorBT16 (Tho-
R1)
Temperature sensor, suction gasBT17 (Tho-
S)
Temperature sensor, ambientBT28 (Tho-
A)
Temperature sensor 2, evaporatorTho-R2
Electrical components
Communication boardAA23
Fuse for external heating cableAA23-F3
DIP switch, addressing of outdoor moduleAA23-S3
Terminal block, KVRAA23-X1
Terminal block, communication from indoor
module
AA23-X4
Terminal block, communication outdoor
module
AA23-X100
Compressor heaterEB10 (CH)
Drip tray heaterEB11 (DH)
Main fuse compressor unitF
FanGQ1
(FM01)
FanGQ2
(FM02)
Control board(PWB1)
Inverter board(PWB2)
Filter board(PWB3)
EMC filter for inverterRF2
EMC filter for incoming supplyRF3
Terminal block, incoming supply and commu-
nication with board AA23
(TB)
Cooling components
EvaporatorEP1
CondenserEP2
CompressorGQ10 (CM)
Drying filterHS1
Shut-off valve, liquid lineQM36
Shut-off valve, gas lineQM37
Expansion valve, heatingQN1 (SM2)
4-way valveQN2 (20S)
Expansion valve, coolingQN3 (SM1)
Miscellaneous
Type platePZ1
Serial numberPZ3
Cable gland, incoming supplyUB1
Cable grommet, communicationUB2
Cable gland, heating cable (EB14)UB3
Cable, incoming supplyW1
Designations according to standard EN 81346-2.
Designations within brackets according to the supplier’s standard.
CTC CombiAir MRChapter 3 | The heat pump design16

Electrical connection
CTC CombiAir 6MR
LEK
AA23
AA23-X100
AA23-S3
AA23-X4
AA23-F3
AA23-X1
RF2
UN
PWB1
PWB2
PWB3
TB
CTC CombiAir 10MR
LEK
AA23
AA23-X4
AA23-S3
AA23-X100
AA23-X1
AA23-F3
LEK
PWB2
PWB1
PWB3 TB
17Chapter 3 | The heat pump designCTC CombiAir MR

Electrical components
Communication boardAA23
Fuse for external heating cable (250 mA), max 45
W.
AA23-
F3
DIP switch, addressing of outdoor unitAA23-
S3
Terminal block, KVRAA23-
X1
Terminal block, communication from indoor
module
AA23-
X4
Communication with TBAA23-
X100
Compressor heaterEB10
(CH)
Drip tray heaterEB11
(DH)
Main fuse compressor unitF
FanGQ1
(FM01)
FanGQ2
(FM02)
Control board(PWB1)
Inverter board(PWB2)
Filter board(PWB3)
EMC filter for inverterRF2
EMC filter for incoming supplyRF3
Terminal block, incoming supply and communic-
ation with board AA23
(TB)
Designations according to standard EN 81346-2.
Designations within brackets according to the supplier’s standard.
CTC CombiAir MRChapter 3 | The heat pump design18

Sensor placement
Connection to board (PWB1)
CTC CombiAir 6MR
UN
QN1
BT16 BT14 BT28
EEV
Tho-R1 Tho-D Tho-A
QN2 EB11
20S DH
GQ1
FM01
19Chapter 3 | The heat pump designCTC CombiAir MR

CTC CombiAir 10MR
LEK
EB11
EB10 GQ1
PWB1
BP1 QN2 QN3 QN1 BP2
SM1 SM2 LPTFM01DH 20S
CH
63H1
Connection to board (AA23)
BP4 BT15 BT12 BT3
AA23-S3
CTC CombiAir MRChapter 3 | The heat pump design20