alphainnoTec SWC V Series User manual

Brine/water heat pumps
Operating Manual
SWC V series
UK 83057000cUK – Translation into English of the original German operating manual

2Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Contents
1 About this operating manual ................................ 3
1.1 Validity .............................................................................. 3
1.2 Reference documents............................................. 3
 ............. 3
1.4 Contact............................................................................. 4
2 Safety .......................................................................................... 4
2.1 Intended use ................................................................. 4
 ......................................... 4
2.3 Personal protective equipment.......................... 4
 ............................................................... 4
2.5 Disposal........................................................................... 5
2.6 Avoid damage to property .................................... 5
3 Description............................................................................. 6
3.1 Layout ............................................................................... 6
3.2 Accessories................................................................... 8
3.3 Function ........................................................................... 8
4 Operation and care........................................................ 9
4.1 Energy and environmentally aware
operation ......................................................................... 9
4.2 Maintenance ................................................................. 9
5 Delivery, storage, transport and
installation............................................................................... 9
5.1 Scope of supply .......................................................... 9
5.2 Storage...........................................................................10
 .....................................10
5.4 Installation .................................................................... 11
6 Installation and connection.................................. 12
6.1 Dismantle the module box.................................. 12
6.2 Installing the module box ....................................15
6.3 Install the hydraulic connections ....................15
6.4 Connect the electrical cables........................... 16
6.5 Installing the control ............................................... 17
 .................................18
7.1 Remove the front panel of the module box18
7.2 Heating water quality.............................................18
 ........................18
7.4 Vent the circulation pump of the heat
source ............................................................................. 19
 
water charging circuit ............................................20
8 Insulate hydraulic connections.........................20
 ...............................................21
10 Commissioning ................................................................ 21
11 Maintenance.......................................................................22
11.1 Basic principles.........................................................22
11.2 Maintenance as required.....................................22
11.3 Yearly maintenance................................................22
 
condenser.....................................................................22
12 Faults .........................................................................................23
 ..........23
13 Dismantling and Disposal .....................................23
13.1 Dismantling..................................................................23
13.2 Disposal and Recycling........................................23
Technical data/Scope of supply ....................... 24
Performance curves......................................... 26
Dimensioned drawing....................................... 28
Installation plans .............................................. 30
Hydraulic integration, unit variant H (heating) .. 33
Terminal diagram.............................................. 37
Circuit diagram 1/3 ........................................... 39
EC Declaration of Conformity .......................... 46

3
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
1 About this operating manual
This operating manual is part of the unit.
        
operating manual carefully and follow it for all
activities at all times, especially the warnings
and safety instructions.
Keep the operating manual to hand at the unit
and hand over to the new owner if the unit
changes hands.
If you have any questions or anything is unclear,

factory's customer service.
Note and follow all reference documents.
1.1 Validity
This operating manual refers solely to the unit
      
(Æ        
page 3).
1.2 Reference documents
The following documents contain additional
information to this operating manual:

Planning & design manual, hydraulic integration

Operating manual of the heating and heat pump
controller

Brief description of the heat pump controller

Operating manual of the expansion board
(accessories)

       
manufacturer

      
contact with the manufacturer or the local partner of
the manufacturer.
 
product number) here.
1.3 


Symbol Meaning
Safety-relevant information.
Warning of physical injuries.
DANGER Indicates imminent danger resulting
in serious injuries or death.
WARNING Indicates a potentially dangerous
situation, which can result in serious
injuries or death.
CAUTION Indicates a potentially dangerous
situation, which can result in moder-
ate or minor injuries.
ATTENTION Indicates a potentially dangerous
situation, which can result in prop-
erty damage.
Symbols in the document
Symbol Meaning
Information for the professional
Information for the owner/operator
9Requirement for an action
XSingle step action prompt
1., 2., 3. ... Numbered step within a multi-step
action prompt. Keep to the given
order.
Additional information, e.g. note
    
standards
Æ Reference to further information
elsewhere in the operating manual
or in another document

4Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
1.4 Contact
Addresses for purchasing accessories, for service
cases or for answers to questions about the unit and
this operating manual can be found on the internet at


Germany: www.alpha-innotec.de

EU: www.alpha-innotec.eu
2 Safety
Only use the unit if it is in proper technical condition
and only use it as intended, safely and aware of the
hazards, and follow this operating manual.
2.1 Intended use
The unit is solely intended for the following functions:

Heating

Domestic water heating (optional, with accesso-
ries)

Cooling (optional, with accessories or unit type
...K3)
 Proper use includes complying with the
operating conditions (Æ“Technical data/Scope
of supply” on page 24) and the operating
manual and noting and following the reference
documents.
 When using the local regulations note: laws,
standards, guidelines, directives.
All other uses of the unit are not as intended.
2.2 
All instructional information in this operating manual



     
injuries and damage to property.
Ensure that the personnel is familiar with the
local regulations, especially those on safe and

     
        
electronics.


–Heating installer
–Plumbing installer
–Refrigeration system installer (maintenance

During the warranty and guarantee period, service
        
personnel authorised by the manufacturer.
2.3 Personal protective equipment

of the unit.
 Wear cut-resistant protective gloves during
transport.
2.4 

Components in the unit are live with life-threatening
voltage. Before opening the unit panelling:
Disconnect unit from power supply.
      
again.

explosive atmospheres
Constituents of antifreeze mixtures, e.g. ethanol,
      
explosive atmosphere:
 mix antifreeze in well-ventilated rooms.

comply with the relevant safety regulations.

5
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Injuries and environmental damage due to
refrigerant
The unit contains harmful and environmentally
      
unit:
1. Switch off unit.
2. Thoroughly ventilate installation room.
3. Notify authorised customer service.
2.5 Disposal
Batteries
Improper disposal of the buffer battery damages the
environment.
Dispose of the buffer battery in an environmen-
tally compatible way according to the local regu-
lations.
Media harmful to the environment
Improper disposal of environmentally harmful media
(antifreeze, refrigerant) damages the environment:
Collect media safely.
Dispose of the media in an environmentally com-
patible way according to the local regulations.
2.6 Avoid damage to property
Improper action
Requirements for minimum scale and corrosion
damage in hot water heating systems:

Proper planning, design and start-up

Closed system with regard to corrosion

Integration of adequately dimensioned pressure
retention

Use of deionised heating water (VE water)

Regular servicing and maintenance
If a system is not planned, designed, started up and
operated according to the given requirements, there
         
occur:

Malfunctions and the failure of components, e.g.
pumps, valves

      
exchangers

    
components, e.g. heat exchanger, pipes, pumps

Material fatigue

Gas bubbles and gas cushion formation
(cavitation)

Negative effect on heat transfer, e.g. formation
of coatings, deposits, and associated noises,

Note and follow the information in this operating


water in the heating circuit

generator and the heating components depend
decisively on the quality of the heating water.

calcium precipitates as scale. Limescale deposits
form on the heat transfer surfaces of the heating. The

cases the heat exchangers are damaged.
Fill system with deionised heating water
(VE water) only.
Unsuitable quality of the water-antifreeze
mixture in the heat source
 For operation of the heat source with water-
      
      
side.

6Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
3 Description
3.1 Layout
NOTE
This section essentially names the
     
described in this operating manual.
Housing with unit components
 
2 Valve motor
3 3-way changeover valve, heating
circuit/domestic hot water
4 Heating circuit/hot water circulation pump
5 Module box
6 Height-adjustable foot (4x)
7 Electrical switch cabinet
8 Heating element
9 Manual output control heating
element (MLRH), accessories
NOTE
The diagram shows a unit with an output
.
Rating plate
Rating plates are attached to the following places on
the unit:

top of the right-hand outer panel

left-hand side, on the module box
The rating plate contains the following information at
the top:

Unit type, product number

Serial number
The rating plate also contains an overview of the
most important technical data.
.
5
6
4
3
2
1
8
9
7

7
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Module box, variant without cooling
6
5
7
8
1
3
4
2
1 Compressor
2 Condenser
3 Vibration isolator (4x)
4 Lifting lug (4x)
5 Evaporator
6 Heat source circulation pump
 
 
Module box, variant with cooling
6
5
7
9 8
1
2
3
4
1 Compressor
2 Condenser
3 Vibration isolator (4x)
4 Lifting lug (4x)
5 Evaporator
6 Heat source circulation pump
 
 
 

8Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Control unit
12
1 Control
 

updates and for data logging)
 
for wall-mounted installation)
Underside of control
13 42
1 RBE (RS 485)
 
3 LIN bus cable connection to the heat pump
4 not used
3.2 Accessories
The following accessories are available for the unit
through the manufacturer's local partner:

      
panel, if the control is mounted on the wall



Room thermostat for switching the cooling
function (if included)

Dew point monitor for protecting a system with


Expansion board for automatic changeover
between heating and cooling mode

Manual output control heating element (MLRH)
for limiting the output of the electric heating
element

      
with a cooling function

for units without cooling: Pump assemblies
     
circuit)




3.3 Function
Liquid refrigerant is evaporated (evaporator), the
energy for this process is environmental heat and
comes from the “ground” heat source (collector,
borehole heat exchanger). The gaseous refrigerant
is compressed (compressor), this causes the
pressure to rise and therefore the temperature too.
The gaseous refrigerant with high temperature is

Here the high temperature is discharged to the
heating water and is used in the heating circuit.
The liquid refrigerant with high pressure and high
temperature is expanded (expansion valve). The
pressure and temperature drop and the process
begins again.
Due to the integrated changeover valve and the
     
heated heating water can be used for charging the
domestic hot water or for heating the building. The
temperatures required and use are controlled by the
heat pump controller. Reheating, drying out screed
or increasing the domestic hot water temperature
can be carried out using the integrated electric
heating element, which is activated by the heat pump
controller as and when necessary.
       
pump does not switch to high-pressure fault if all
heating circuits are closed. The integrated vibration
isolators for the heating circuit and heat source
prevent structure-borne sound and vibrations from

into the building.

9
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Cooling
Cooling is integrated in type K units. Type H units
      
accessories. The following options are possible for
units with cooling function (Æoperating manual of
the heating and heat pump controller):

Passive cooling (without compressor)

Control of the cooling function via the heating
and heat pump controller

Switching between heating and cooling
mode; automatically with expansion board
(accessories)

The control can be connected to a computer or
   
pump controller can then be controlled from the

4 Operation and care
NOTE
The unit is operated via the control of
the heating and heat pump controller
(Æoperating manual of the heating and heat
pump controller).
4.1 Energy and environmentally
aware operation
The generally accepted requirements for energy-
aware and environmentally-aware operation of a
heating system also apply to use of a brine/water
heat pump. The most important measures include:



No unnecessarily high domestic hot water
temperature (note and follow local regulations)

Do not open windows with gap /tilt open
(continuous ventilation), but instead open wide
for a short time (purge ventilation).
4.2 Maintenance
Wipe down the outside of the unit only using a damp
cloth or cloth with mild cleaning product (washing-
up liquid, neutral cleaning product). Do not use any
harsh, abrasive, acid or chlorine-based cleaning
products.
5 Delivery, storage, transport
and installation
ATTENTION
Damage to the housing and the unit components
due to heavy objects.
Do not place any objects on the unit which are
heavier than 30 
5.1 Scope of supply
NOTE
On delivery the accessories are enclosed in

     
outwardly visible damage and completeness.
Notify supplier of any defects immediately.


       
page 3 of this manual

Control unit, consisting of the control, wall


6-mm anchors with screws (2x each) for wall-
mounting the control unit

Safety valve, outdoor sensor
 C

Replacement material after dismantling the
module box:
–Insulation hoses (2x)
–Cable ties (4x)
– 

–      
O-rings (8x)



10 Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
5.2 Storage
       
directly before installation.
Store unit protected against:
–Moisture/damp
–Frost
–Dust and dirt
5.3 
Notes on safe transport
The housing with the unit components and the
module box are heavy (Æ“Technical data/Scope of
         
or damage to property if the housing with the unit
components falls or overturns or if the module box
falls.
The housing with the unit components and
module box must be transported and installed
by several persons.
Secure the housing with the unit components
during transport. Carry the module box by the
carrying lugs.

of the unit.
Wear cut resistant protective gloves.
The hydraulic connections are not designed for
mechanical loads.
Do not lift or transport the unit by the hydraulic
connections.
If the module box is tilted by more than 45°,
compressor oil runs into the cooling circuit.
Do not tilt the unit with installed module box by
more than 45°.
       
alternatively with a handcart.

Transport the unit to the place of installation


NOTE

 
and dismantling the housing panels.
1.        
damage the unit.
2.      
     
friendly way according to local regulations.
3. 
front panel in the place of installation.
Dismantle housing panels for transport with
handcart or carrying the unit
9 Æ
1. To avoid damage to the housing panels:
–Undo 2 screws at the bottom of the front
panel.
–Lift up the front panel and put down in safe
place.
–Undo 3 screws in each side panel.
–Lift up side panels and put down in safe
place.
8x
1.
2.
3.

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Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Transport with a handcart
NOTE
 If transporting with a handcart the module
box must be pushed in.
      
transporting the unit on its left-hand side;
it can also be transported on its right-
hand side.
9
Housing panels are dismantled.
1. To avoid damage: On a handcart, load the unit
on its side only.
2. Transport unit on the handcart.
Carrying the unit
9 Housing panels are dismantled.
1. Dismantle module box and carry it by the
support lugs to the place of installation.
2. Carry the unit horizontally wherever possible.
5.4 Installation
Installation room and space requirements
NOTE
Note and follow the local regulations and
standards regarding the installation room
and space requirements. The table shows
the regulations as per EN 378-1 relevant in
Germany.
Refrigerant Limit value [kg/m³]
R 134a 0.25
R 404A 0.48
R 407C 0.31
R 410A 0.44
(Æ“Technical data/Scope of supply” on page 24).
Minimum room
volume =


NOTE
If several heat pumps of the same type are
installed only one heat pump need to be
   
different types are installed, only the heat
pump with the largest refrigerant volume

9
Minimum volume corresponds to the
requirements for the refrigerant used.
9
Installation inside the building only.
9
Installation room is dry and frost-free.
9
Clearance dimensions are met (Æ“Installation
plans” on page 30).
9
      
the unit:
–level and horizontal
–load-bearing capacity for the unit's weight
Aligning the unit
Align the unit horizontally and stably in the
installation site using the height-adjustable feet
and a spanner size SW 13. Adjustment range:
25 mm.

12 Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
6 Installation and connection
6.1 Dismantle the module box
ATTENTION
If the module box is tilted by more than 45°,
compressor oil runs into the cooling circuit.
Do not tilt the module box by more than 45°.
NOTE
 If necessary the module box can be
dismantled for easier transport of the unit
or for service reasons.
 Steps 1 to 5 are only required if the

9
Unit is safely disconnected from the power
supply and protected against being switched

1. Remove the front panel of the module box
(Æ“7.1 Remove the front panel of the module
box” on page 18).
2. Close shut-off valves to the heating circuit.
3. 
heating.
Unitwithout cooling:
Unitwith cooling:

13
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
4. Use a spanner to close the shut-off valves of the
heat source (behind the covers).
5. 
heat source.
Unitwithout cooling:
Unitwith cooling:
6. Disconnect the electrical connections:
–Disconnect 2 white connectors (1) at the
bottom of the electrical control cabinet. To
do this, release the lugs by pressing on the
sides of the connectors.
–      
at the top of the module box.
1
2
7. Remove the insulation on the hydraulic
connections.
8. Remove 3 clips on the hydraulic connections.

14 Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
9. Use spanner size SW 37 to unscrew the heating

10. Disconnect the hydraulic connections; to do this,
push the pipes apart as far as necessary.
11. Remove the 2 side retaining screws.
12. 
more easily: place boards“(4) under it, e.g. from

13. 
14. Slowly and carefully pull out the module box by
the carrying lugs“(2). Ensure that none of the
pipes are damaged
2
3
4
1
1.
2.
15. Pull out the module box completely and place it
on the boards.

15
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
6.2 Installing the module box
1. Place the module box carefully in the bottom of
the housing and slowly and carefully push it in.
–
–Lift up pipes so that they do not get damaged.
2. Attach the two side retaining screws.
3. Connect the hydraulic connections. At the
same time, replace O-rings on the heat pump
connections (Æ
4. Perform pressure test and insulate pipes with
the enclosed insulation hoses (Æseparate

5. Connect the electrical cables:
–Plug both connectors into the electrical
control cabinet. Ensure that the connectors
move easily and the lugs latch into position.
–
top of the module box.
6.3 Install the hydraulic connections
ATTENTION
Damage to the copper pipes due to unacceptable
loading!
 Secure all connections against twisting.
NOTE
The heat source can be connected from the
top, right or left.
9
The heat source system has been installed in
  Æplanning
& design manual, dimensioned diagrams,
installation plans).
9
Cross-sections and lengths of the pipes for the
heating circuit and heat source are dimensioned
adequately.
9
The free pressure of the circulation pumps
produces at least the minimum throughput
required for the unit type (Æ“Technical data/
Scope of supply” on page 24).
9
The cables for the heat source and the heating


valves
NOTE
This section is only relevant for units with up

ATTENTION

force!
 Tighten the union nut only as far as described
here.
1.       
deformation.
2.        

3. Push the pipe through the clamping ring up to

4. Tighten the union nut hand-tight and attach

5. Tighten union nut with 3/4 rotation.
6. 

1. 
2. Tighten the union nut hand-tight and retighten
with the open-ended spanner with 1/8 to 1/4 turn,
as the clamping ring is already in a clamping
position.
Connect the unit to the heat source and
heating circuit
1. Install shut-off devices in the heating circuit.
2. 
the shut-off devices at the heat source.
3. Insert the vent at the highest point of the heat
source and the heating circuit.
4. 
0.9 mm onto the heat source inlet.
5. Ensure that the operating overpressures
(Æ“Technical data/Scope of supply” on page
24) are not exceeded.

16 Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
6.4 Connect the electrical cables
ATTENTION
Irreparable damage to the compressor due to

 
the compressor load infeed.
Basic information on the electrical connection
NOTE
Ensure that the unit is supplied with electricity

attaching the unit panelling, switch the power


      
company may apply to electrical connections.

Fit the power supply for the heat pump with an
     
3 mm contact spacing (IEC 60947-2).

Note the level of the tripping current
(Æ“Technical data/Scope of supply” on page
24).

Comply with the electromagnetic compatibility
regulations (EMC regulations).
–Lay the control/sensor cables and unit supply

–Lay unshielded power supply cables and
     
far apart.

Do not lengthen the patch cable and LIN bus
cable. LIN bus cables up to 30 m long can be
used if the quality of the cable is the same as
that of the original cable.

the connections
1. Strip the sheathing of all cables to the external
loads before laying in the cable duct of the
control box.
2. Open electrical switchbox:
–Undo 4 screws in the cover panel of the
electrical control box.
–Remove the cover panel.
3. Feed the control/sensor cables and unit supply
cable into the housing from the rear.
4. Route cables from underneath through the cable
openings in the control box.
5. Connect cables to the respective terminals
(Æ“Terminal diagram” on page 37).
Control the controller via a PC
1. 
(category 6) through the unit.
2.  

1
NOTE
       
time.

17
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
6.5 Installing the control
NOTE
The control can be inserted in a recess in the
front panel of the unit or can be installed on
the wall.
Insert the control in the unit and connect
1.       
slot. To do this, dismantle the front panel
(Æ“Dismantle housing panels for transport with
handcart or carrying the unit” on page 10),
press the lugs together and push out of the
openings.
2.        
front panel.
3. Position the control in the recess in the front unit
panel.
4. Cut the cable to length generously so that the
front panel can be removed and placed to the
side of the unit. Do not cut the cable ties for
strain relief of the LIN bus cable at the electric
control box.
–
the strain relief at the electrical control box
–All other cables approx. 1.2 m
5. Use cable ties (Æ

20 cm in front of the connector (strain relief).
200 mm
6. Push the cable through the opening in the front
panel of the unit from below and into the control.
7. Press the lugs of the control into the openings in
the front panel of the unit.
Mount the control on the wall and connect
1. 
2. If visually unattractive: Cut off the lugs on the
rear of the control (are only needed to insert in
the front panel).
3.    Æ“Dimensioned drawing of

4. 
the web at the bottom in the middle of the wall

5.       
plugs (1) and 2 screws“ (3).
1
23
1.
2.
3.
4.

18 Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
6. Feed in the cables from the wall (e.g. in-wall
box) or from below.
7. Route the LIN bus cable from the top right-hand
side at the rear from the heat pump and plug into
the control at the bottom.
8. 
9.       
(accessories).
7 
7.1 Remove the front panel of the
module box
Unscrew the front panel of the module box.
7.2 Heating water quality
NOTE
 For detailed information refer, among
other things, to the VDI Guidelines
2035 “Vermeidung von Schäden in
Warmwasserheizanlagen” (preventing
damage in hot water heating systems).
 Required pH value: 8,2 ... 10
 for aluminium materials: pH value:
8,2 ... 8.5
Fill the system with deionised heating water
(VE water) only (low-salt operation of the
system).
Advantages of low-salt operation:

Low corrosion-promoting properties

No formation of mineral scale

Ideal for closed heating circuits

      


      
8.2 by adding chemicals
7.3 
Water and the following antifreeze products are


Monopropylene glycol

Monoethylene glycol

Ethanol

Methanol
 For operation of the heat source with water-
      
      
side.
 
Ensure that the antifreeze is compatible with the
pipe, seal and other component materials used
on site.
9
Drain pipe of the safety valve is connected.
9
Room is ventilated.

19
Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
1. Mix antifreeze with water thoroughly with the
required ratio, before adding to the heat source.
2. 
mixture. Frost protection: -13 °C
3. Fill the heat source with the water-antifreeze
mixture.
4. Flush heat source system.
5. Flush until the system is air-free.
6. Fill the unit via the ball valves in the module box
7.4 Vent the circulation pump of the
heat source
NOTE
The diagram shows the unit variant with
cooling. In the unit variant without cooling the
circulation pump is located in the same place.
1. Place vessel for collecting discharging liquid
under the outlet.
2. Undo screw-on cap in the middle of the
circulation pump.
3. Wait until liquid is discharged uniformly.
4. 
5. Dispose of collected liquid according to the local
regulations.
6. Set system pressure to 1 bar.

20 Subject to change without notice | 83057000cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
7.5 
domestic hot water charging
circuit
9 Drain pipe of the safety valve is connected.
9
The front panel of the module box is unscrewed.
Ensure that the set pressure of the safety valve
is not exceeded.
1.         
motor (1).
2. Pull the valve motor carefully upwards and off
the 3-way changeover valve (3).
1
2
3
2.
1.
3. Turn the spindle of the 3-way changeover valve
so that the rounded side of the spindle points in

the 3-way changeover valve.
AB
4. Flush the domestic hot water charging circuit for
approx. 1 minute.
5. Turn the spindle so that the rounded side of the
        
the connections of the 3-way changeover valve.
6. Flush heating circuit thoroughly, until no more
air is discharged.
7. Position the valve motor (1) on the 3-way
changeover valve (3).
8.          
motor.
1
3
1.
2. 2
9. Ensure that the U-clip has latched into position
correctly:
–Valve motor sits securely on the 3-way
changeover valve.
–Both prongs of the U-clip sit on the lug.
–The tips of the U-clip are visible by approx.

10. Unscrew the front panel of the module box.
8 Insulate hydraulic
connections
1. Insulate heating circuit and heat source
according to the local regulations.
2. Open shut-off devices.
3. 
4. Insulate the internal piping of the module box
with the insulation material from the separate

5. Insulate external piping on site.
6. 
7. Insulate heat source so that it is vapour-diffusion
tight.
8. Insulate the heating circuit of units with cooling
vapour-diffusion tight too.
9.        
higher, insulate the venting valve at the cold
heat exchanger too so that it is vapour-tight. To
do this, glue the insulation strips on top of each
other (Æ