Viessmann VITOCAL 300-G Quick guide

Installation and service instructions
for contractors
VIESMANN
Vitocal 300-G
Type BW/BWS 301.B06 to B17
Type BWC 301.B06 to B17
Heat pump with electric drive, 1 and 2-stage
■Brine/water heat pump: 5.7 to 34.4 kW
■With conversion kit to water/water heat pump: 7.5 to 45.2 kW
VITOCAL 300-G
5516461 GB 7/2018 Please keep safe.

2
Please follow these safety instructions closely to
prevent accidents and material losses.
Safety instructions explained
Danger
This symbol warns against the risk of injury.
!Please note
This symbol warns against the risk of material
losses and environmental pollution.
Note
Details identified by the word "Note" contain additional
information.
Target group
These instructions are exclusively intended for author-
ised contractors.
■Work on the refrigerant circuit may only be carried
out by authorised refrigeration engineers.
■Work on electrical equipment must only be carried
out by a qualified electrician.
■The system must be commissioned by the system
installer or a qualified person authorised by the
installer.
Regulations to be observed
■National installation regulations
■Statutory regulations for the prevention of accidents
■Statutory regulations for the protection of the envi-
ronment
■Codes of Practice of the relevant trade associations
■All relevant safety regulations as defined by DIN, EN,
DVGW, VDE and locally applicable standards
aÖNORM, EN and ÖVE
cSEV, SUVA, SVTI, SWKI and SVGW
Safety instructions for working on the system
Working on the system
■Isolate the system from the power supply, e.g. by
removing the separate fuse or by means of a mains
isolator, and check that it is no longer live.
Note
In addition to the control circuit there may be several
power circuits.
Danger
Contact with live components can result in
severe injuries. Some components on PCBs
remain live even after the power supply has
been switched off.
Prior to removing covers from the appliances,
wait at least 4 minutes until the voltage has
completely dropped out.
■Safeguard the system against reconnection.
■Wear suitable personal protective equipment when
carrying out any work.
Danger
Hot surfaces and fluids can lead to burns or
scalding.
■Before maintenance and service work, switch
OFF the appliance and let it cool down.
■Never touch hot surfaces on the appliance, fit-
tings or pipework.
!Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing work, touch earthed
objects such as heating or water pipes to dis-
charge static loads.
Repair work
!Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of the
system.
Replace faulty components only with genuine
Viessmann spare parts.
Safety instructions
Safety instructions
5516461

3
Auxiliary components, spare and wearing parts
!Please note
Spare and wearing parts that have not been tes-
ted together with the system can compromise its
function. Installing non-authorised components
and making non-approved modifications or con-
versions can compromise safety and may inva-
lidate our warranty.
For replacements, use only original spare parts
supplied or approved by Viessmann.
Safety instructions for operating the system
What to do if water escapes from the appliance
Danger
If water escapes from the appliance there is a
risk of electrocution.
Switch OFF the heating system at the external
isolator (e.g. fuse box, domestic distribution
board).
Danger
If water escapes from the appliance there is a
risk of scalding.
Never touch hot heating water.
Safety instructions
Safety instructions (cont.)
5516461

4
1. Information Disposal of packaging ............................................................................ 6
Symbols ................................................................................................. 6
Intended use .......................................................................................... 6
Product information ................................................................................ 7
■Type BW 301.B and BWC 301.B ........................................................ 7
■Type BWS 301.B (heat pump stage 2) ............................................... 7
■System examples ............................................................................... 8
2. Preparing for installation Designations in the system examples ................................................... 9
Primary circuit, type BW/BWC 301.B ..................................................... 10
■With water/water heat pump conversion kit: 1 primary pump ............. 10
Primary circuit, type BW 301.B + BWS 301.B (2-stage) ........................ 12
■With water/water heat pump conversion kit: 2 primary pumps ........... 12
■With water/water heat pump conversion kit: 1 common primary
pump ................................................................................................... 14
Requirements for on-site connections ................................................... 17
■1-stage (type BW 301.B, BWC 301.B) ............................................... 17
■2-stage (type BW 301.B + BWS 301.B) .............................................. 18
Siting and transport requirements .......................................................... 19
■Transport ............................................................................................ 19
■Installation room requirements ........................................................... 19
3. Installation sequence Positioning the heat pump ..................................................................... 21
Removing the top panel ......................................................................... 22
Making the hydraulic connections .......................................................... 22
■Connecting the primary circuit ............................................................ 22
■Connecting the secondary circuit ....................................................... 23
Electrical connection .............................................................................. 24
■Preparing the electrical connections ................................................... 24
■Installing the programming unit (type BW 301.B and BWC 301.B) .... 25
■Routing cables to the wiring chamber ................................................ 26
■Making the electrical connection of heat pump stage 1 (type
BW 301.B) and stage 2 (type BWS 301.B) ......................................... 27
■Overview of the electrical connections of the heat pump control unit
(type BW/BWC 301.B) ........................................................................ 28
■Main PCB (230 V~ components) ........................................................ 28
■Expansion PCB on main PCB (230 V~ components) ......................... 32
■Cross connect PCB (signal and safety connections) .......................... 36
■Controller and sensor PCB (sensors) ................................................. 38
■Connection of primary circuit flow/return temperature sensor, 2-
stage heat pump ................................................................................. 40
■Swimming pool heating ...................................................................... 40
Power supply ......................................................................................... 41
■Heat pump control unit power supply 230 V~ ..................................... 42
■Compressor power supply 400 V~ ..................................................... 42
■Power supply with power-OFF: Without on-site load disconnect ....... 43
■Power supply with power-OFF: With on-site load disconnect ............ 44
■Mains power supply in conjunction with on-site power consumption . 47
■Smart Grid .......................................................................................... 47
■Phase monitor (if installed) ................................................................. 49
Make connections at terminals X3.8/X3.9 ............................................. 50
Closing the heat pump ........................................................................... 50
Checking the diaphragm grommets ....................................................... 51
4. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 52
5. Maintenance Overview of wiring chamber .................................................................. 67
■Type BW/BWC 301.B ......................................................................... 67
■Type BWS 301.B ................................................................................ 68
Index
Index
5516461

5
Opening the casing door ........................................................................ 69
Overview of internal components .......................................................... 70
Draining the heat pump on the primary/secondary side ........................ 71
Checking the sensors ............................................................................ 71
■Viessmann NTC 10 kΩ (blue marking) ............................................... 73
■Viessmann Pt500A (green marking) ................................................... 74
Checking the fuses ................................................................................ 74
The appliance is too noisy ..................................................................... 75
Condensation and moisture in the heat pump module .......................... 75
6. Parts lists, type
BWC 301.B
Overview of the assemblies, type BWC 301.B ...................................... 77
Parts not shown, type BWC 301.B ........................................................ 78
Casing, type BWC 301.B ....................................................................... 80
Electrical equipment, type BWC 301.B .................................................. 82
Heat pump module, type BWC 301.B .................................................... 84
Hydraulics, type BWC 301.B ................................................................. 86
7. Parts lists, type BW 301.B Overview of the assemblies, type BW 301.B ......................................... 89
Parts not shown, type BW 301.B ........................................................... 90
Casing, type BW 301.B .......................................................................... 92
Electrical equipment, type BW 301.B .................................................... 94
Heat pump module, type BW 301.B ...................................................... 96
Hydraulics, type BW 301.B .................................................................... 98
8. Parts lists, type
BWS 301.B
Overview of the assemblies, type BWS 301.B ...................................... 101
Parts not shown, type BWS 301.B .........................................................102
Casing, type BWS 301.B ....................................................................... 104
Electrical equipment, type BWS 301.B .................................................. 106
Heat pump module, type BWS 301.B .................................................... 108
Hydraulics, type BWS 301.B ..................................................................110
9. Commissioning/service
reports
Hydraulic parameters report .................................................................. 112
Control parameters report ......................................................................112
10. Specification Specification for brine/water heat pumps ...............................................123
Specification for water/water heat pumps ..............................................125
11. Appendix Commissioning order .............................................................................127
Final decommissioning and disposal ..................................................... 127
12. Certificates Declaration of conformity ....................................................................... 128
13. Keyword index ................................................................................................................129
Index
Index (cont.)
5516461

6
Please dispose of packaging waste in line with statu-
tory regulations.
DE: Use the disposal system organised by
Viessmann.
AT: Use the ARA statutory disposal system (Altstoff
Recycling Austria AG, licence number 5766).
CH: Packaging waste is disposed of by the HVAC
contractor.
Symbols
Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
The steps in connection with commissioning, inspec-
tion and maintenance are found in the "Commission-
ing, inspection and maintenance" section and identified
as follows:
Symbol Meaning
Steps required during commissioning
Not required during commissioning
Steps required during inspection
Not required during inspection
Steps required during maintenance
Not required during maintenance
Intended use
The appliance is only intended to be installed and
operated in sealed unvented heating systems that
comply with EN 12828, with due attention paid to the
associated installation, service and operating instruc-
tions.
Depending on the version, the appliance can only be
used for the following purposes:
■Central heating
■Central cooling
■DHW heating
Information
Disposal of packaging
5516461
Information

7
The range of functions can be extended with additional
components and accessories.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.
Commercial or industrial usage for a purpose other
than central heating/cooling or DHW heating shall be
deemed inappropriate.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and will result in an exclusion of liability. Incorrect
usage also occurs if the components in the heating
system are modified from their intended function.
Note
The appliance is intended exclusively for domestic or
semi-domestic use, i.e. even users who have not had
any instruction are able to operate the appliance
safely.
Product information
Type BW 301.B and BWC 301.B
Design
Vitocal 300-G, type BW 301.B and type BWC 301.B
are brine/water heat pumps for central heating, room
cooling and DHW heating in mono mode or mono
energetic systems.
The refrigerant circuit has an electronic expansion
valve (EEV) with an independent control circuit (refrig-
erant circuit controller).
For central heating and DHW heating, an instantane-
ous heating water heater (accessories) can also be
controlled.
Output extension
The output of type BW 301.B can be extended with a
heat pump stage 2 (type BWS 301.B).
Hydraulics
Type BWC 301.B includes high efficiency circulation
pumps for the primary and secondary circuits and a
high efficiency circulation pump for DHW heating.
For type BW 301.B, these pumps are available as
accessories.
Conversion to water/water heat pump
The Vitocal 300-G brine/water heat pump, type BW/
BWC 301.B, becomes a water/water heat pump in
conjunction with the conversion kit (accessories). A
separate well circuit provides the primary circuit with
heating energy via a separating heat exchanger
(accessories). The components of the well circuit and
primary circuit are controlled by the heat pump control
unit.
Central heating
The heat pump can supply up to 3 heating circuits –
1 heating circuit without and 2 heating circuits with
mixer. The mixer extension kit (accessories) is
required to control the mixer for the second heating cir-
cuit with mixer.
Room cooling
Rooms can be cooled either via 1 heating/cooling cir-
cuit or 1 separate cooling circuit. Hydraulic accessories
are required for this, e.g. NC-Box with mixer.
Heat pump control unit
The entire system is monitored and controlled by the
integral Vitotronic 200 heat pump control unit,
type WO1C.
Type BWS 301.B (heat pump stage 2)
Heat pump stage 2 is used to extend the output of type
BW 301.B (heat pump stage 1).
Information
Intended use (cont.)
5516461
Information

8
Note
Heat pump stage 2 must be installed to the left of heat
pump stage 1.
Design
Heat pump stage 2 has a separate refrigerant circuit
with refrigerant circuit controller, but no separate heat
pump control unit. Stage 2 is switched via the heat
pump control unit of stage 1.
Hydraulics
On the primary side of a 2-stage version, either use a
separate primary pump for each stage, or use a
shared primary pump. Irrespective of this, the flow and
return temperature sensors are installed in the primary
circuit on the shared flow and return.
Depending on the hydraulic connection, heat pump
stage 2 can be used both for central heating and for
DHW heating. A separate secondary pump and circu-
lation pump for cylinder heating (both accessories) are
therefore required for the heat pump stage 2.
System examples
Available system examples: See www.viessmann-
schemes.com.
Information
Product information (cont.)
5516461
Information

9
--230V-- -KM BUS-
--F6-- --F0-- --F8-- --F14--
--212.3-- --211.2-- --211.4--
-2/X3.8;3.9-
2
2
[H
F
[YF
F
--2/F14--
--2/211.2--
-2/145-
A1
--2/X3.8;3.9--
oR
iE
oE oP
oQ
oW
oE
--2/F14--
oEoE
Fig. 1
Preparing for installation
Designations in the system examples
5516461
Installation

10
With water/water heat pump conversion kit: 1 primary pump
Hydraulic installation scheme
19
24
26
28
22
20
2
--KM BUS--
--X3.8;3.9--
--211.1--
--230V--
--2/X3.8;3.9--
--2/211.1--
27
---------
P1
P1
--2/X3.3;3.4--
23
--X3.3;3.4--
21
--2/X3.8;3.9--
11
6
15 74
P
Fig. 2
Note
Type BWC 301.B is shown. In this case, the circulation
pumps are fitted and connected at the factory (primary
pump qT, secondary pump 6, circulation pump for
cylinder heating 7, instantaneous heating water
heater 4 optional).
For type BW 301.B, no circulation pumps are factory-
fitted. For the connection, see "Electrical installation
scheme".
Equipment required
Pos. Designation
1Heat pump
2Heat pump control unit
qT Primary pump
qO Frost stat, primary circuit
wP Brine accessory pack
wQ Pressure switch, primary circuit
wW Separating heat exchanger, primary circuit
wE Flow switch, well circuit (remove jumper when
connecting)
Pos. Designation
wR Dirt trap
wZ Well pump (suction pump for groundwater; con-
nect via on-site contactor with fuse protection)
■230 V connection: See page 11.
■400 V connection: See page 11.
wU Delivery well
wI Return well
Preparing for installation
Primary circuit, type BW/BWC 301.B
5516461
Installation

11
Electrical installation scheme
For an overview of the electrical connections and more
information on the PCBs: See page 28 onwards and
the separate service instructions for the
"Vitotronic 200" heat pump control unit.
With well pump connection 230 V~
M
1~
M
1~
X1.
X2.N
UP
UP
N
L200 W
N
L1
X1.
X3.4
X3.3
X1.
X3.8
X3.9
230 V/50 Hz
230 V; 0.15 A
230 V; 0.15 A
230 V; 0.15 A
K1
2
qT
wZ
wE
wQ
qO
sH
sYYA
.
Fig. 3
Well pump on-site connection 400 V~
X1.
X2.N
UP
UP
M
3~ 26
2
N
L
15
200 W
26
L1
230 V / 50 Hz
K1
211.1
L2 L3
M
1~
Fig. 4
Preparing for installation
Primary circuit, type BW/BWC 301.B (cont.)
5516461
Installation

12
With water/water heat pump conversion kit: 2 primary pumps
Hydraulic installation scheme
19
24
26 28
22
20
--2/X3.8;3.9--
--2/211.1;224.2--
27
---------
P1
P1
--2/X3.3;3.4--
23
21
--2/X3.8;3.9--
9 1
2
--KM BUS--
--X3.8;3.9--
--230V--
P1 P1
P1 P1
--F2--
16
--2/224.2-- --2/211.1--
--F3--
17
--F2--
--211.1-- --F3--
--224.2--
25 15
--X3.3:3.4--
P
Fig. 5
Equipment required
Pos. Designation
1Heat pump stage 1
2Heat pump control unit
9Heat pump stage 2
qT Primary pump for heat pump stage 1
qZ Primary circuit flow temperature sensor: For in-
stallation, see page 40.
qU Primary circuit return temperature sensor: For
installation, see page 40.
qO Frost stat, primary circuit
wP Brine accessory pack
wQ Pressure switch, primary circuit
wW Separating heat exchanger, primary circuit
Pos. Designation
wE Flow switch, well circuit (remove jumper before
connecting)
wR Dirt trap
wT Primary pump for heat pump stage 2
wZ Well pump (suction pump for groundwater; con-
nect via on-site contactor with fuse protection)
■230 V connection: See page 13.
■400 V connection: See pages 16, 13.
wU Delivery well
wI Return well
Preparing for installation
Primary circuit, type BW 301.B + BWS 301.B (2-stage)
5516461
Installation

13
Electrical installation scheme
For an overview of the electrical connections and more
information on the PCBs: See page 28 onwards and
the "Vitotronic 200" service instructions.
Well pump on-site connection 230 V~
wZ
wT
2
M
1~
M
1~
M
1~
230 V / 50 Hz
UP
200 W
UP
200 W
UP
N
L1
K3
K2K1
qT
211.1
224.2
Fig. 6
Well pump on-site connection 400 V~
2
230 V / 50 Hz
211.1
X1.
X2.N UP 25
200 W
224.2
X1.
X2.N UP 15
200 W
X3.1
K2K1
X2.N
UP
M
3~ 26
L1
K1
L2 L3
M
1~
M
1~
Fig. 7
Preparing for installation
Primary circuit, type BW 301.B + BWS 301.B (2-stage) (cont.)
5516461
Installation

14
Connecting the sensors and limiters
2
qU
wE
wQ
qO
230 V/50 Hz
Low voltage
PT500
PT500
X1.
X3.4
X3.3
X1.
X3.9
X3.8
230 V; 0.15 A
230 V; 0.15 A
230 V; 0.15 A
qZ
F2
F3
aS
aD
Fig. 8
With water/water heat pump conversion kit: 1 common primary pump
Note
If heat pump stages 1 and 2 (type BW 301.B and type
BWS 301.B) are installed with different rated heating
outputs, 2 primary pumps are required due to the dif-
ferent flow rates.
Preparing for installation
Primary circuit, type BW 301.B + BWS 301.B (2-stage) (cont.)
5516461
Installation

15
Hydraulic installation scheme
19
24
26 28
22
20
--2/X3.8;3.9--
--2/211.1;224.2--
27
---------
P1
P1
--2/X3.3;3.4--
23
21
--2/X3.8;3.9--
9 1
2
--KM BUS--
--X3.8;3.9--
--230V--
P1 P1
P1 P1
--F2--
16
--F3--
17
--F2--
--211.1-- --F3--
--2/211.1--
15
--224.2--
P
Fig. 9
Equipment required
Pos. Designation
1Heat pump stage 1
2Heat pump control unit
9Heat pump stage 2
qT Common primary pump
qZ Primary circuit flow temperature sensor: For in-
stallation, see page 40.
qU Primary circuit return temperature sensor: For
installation, see page 40.
qO Frost stat, primary circuit
wP Brine accessory pack
wQ Pressure switch, primary circuit
wW Separating heat exchanger, primary circuit
wE Flow switch, well circuit (remove jumper before
connecting)
Pos. Designation
wR Dirt trap
wZ Well pump (suction pump for groundwater; con-
nect via on-site contactor with fuse protection)
■230 V connection: See page 13.
■400 V connection: See pages 16 and 13.
wU Delivery well
wI Return well
Note
Either fit primary circuit flow and return temperature
sensors in the sensor wells of the hydraulic modules
(accessories) or use a sensor well set (accessories).
Preparing for installation
Primary circuit, type BW 301.B + BWS 301.B (2-stage) (cont.)
5516461
Installation

16
Electrical installation scheme
For an overview of the electrical connections and more
information on the PCBs: See page 28 onwards and
the separate "Vitotronic 200" service instructions.
Well pump on-site connection 400 V~
2
230 V / 50 Hz
211.1
X1.
X2.N
UP
M
1~
200 W
224.2
L1 L2 L3
X2.N UP
M
3~ 26
Fig. 10
Connecting the sensors and limiters
2
qU
wE
wQ
qO
230 V/50 Hz
Low voltage
PT500
PT500
X1.
X3.4
X3.3
X1.
X3.9
X3.8
230 V; 0.15 A
230 V; 0.15 A
230 V; 0.15 A
qZ
F2
F3
aS
aD
Fig. 11
Preparing for installation
Primary circuit, type BW 301.B + BWS 301.B (2-stage) (cont.)
5516461
Installation

17
1-stage (type BW 301.B, BWC 301.B)
133
576
662
727
792
889
962
1155
87
67
125
182
361
496
449
524
600
A
230 V~< 42 V
B
C
D
E
230 V~
< 42 V
A
B
C
E D
784
844
Fig. 12
A
+
Heating water return and DHW cylinder
return
BDHW cylinder flow (heating water side)
CHeating water flow
DPrimary circuit flow (heat pump brine in-
let)
EPrimary circuit return (heat pump brine
outlet)
Preparing for installation
Requirements for on-site connections
5516461
Installation

18
2-stage (type BW 301.B + BWS 301.B)
133
576
662
727
792
889
962
133
576
662
727
792
889
962
1155
87
67
125
182
361
496
67
125
182
361
496
449
524
449
524
600 600
300
230 V~< 42 V
A
784
844
230 V~< 42 V
B
C
D
E
F
G
H
K
L
230 V~
< 42 V
230 V~
< 42 V
A
B
C
E D
F
G
H
L K
784
844
Fig. 13 Type BWS on the left; type BW on the right
A/F
+
Heating water return and DHW cylinder return
B/GDHW cylinder flow (heating water side)
C/HHeating water flow
D/KPrimary circuit flow (heat pump brine inlet)
E/LPrimary circuit return (heat pump brine outlet)
Preparing for installation
Requirements for on-site connections (cont.)
5516461
Installation

19
Transport
!Please note
Impacts, compression and tensile loads can
cause damage to the outside panels of the
appliance.
Never put weight on the top, front or side panels
of the appliance.
!Please note
Tilting the compressor at a steep angle inside
the heat pump can result in appliance damage.
Max. tilting angle: 45° for a very short time
Installation room requirements
!Please note
Unfavourable ambient conditions can lead to
malfunctions and appliance damage.
The installation room must be dry and free from
the risk of frost:
■Ensure ambient temperatures between 0 and
35 °C.
■Max. 70 % relative humidity (corresponds to
an absolute humidity of approx. 25 g water
vapour/kg dry air)
Danger
Dust, gases and vapours can be damaging to
health and trigger explosions.
Avoid dust, gases and vapours in the installation
room.
!Please note
Overloading the floor can result in damage to
the building structure.
Observe the permissible floor load. Take the
total weight of the appliance into account.
Total weight
Type Weight in kg
BW 301.B06 113
301.B08 117
301.B10 129
301.B13 135
301.B17 148
Type Weight in kg
BWC 301.B06 123
301.B08 127
301.B10 139
301.B13 145
301.B17 158
Type Weight in kg
BWS 301.B06 109
301.B08 113
301.B10 125
301.B13 131
301.B17 144
To prevent the transmission of structure-borne noise,
never site the appliance above ceilings with wooden
joists, e.g. in the attic.
Minimum room volume (to EN 378)
Type Refrigerant
charge in kg
Minimum
room volume
in m3
■BW
■BWC
■BWS
301.B06 1.40 3.2
301.B08 1.95 4.4
301.B10 2.40 5.5
301.B13 2.25 5.1
301.B17 2.75 6.3
Preparing for installation
Siting and transport requirements
5516461
Installation

20
Minimum clearances for 1-stage (type BW/
BWC 301.B)
≥ 400
≥ 1500
A
B
Fig. 14
ASubject to on-site installation and site conditions
B■Without AC-Box:
≥ 100 mm
■With AC-Box (accessories, for installation to the
left of the heat pump):
≥ 400 mm (plus width of the AC-Box)
Note
■Observe clearances for installation and mainte-
nance.
■Additional strain relief clamps are required for the
power cables if the clearance behind the heat pump
is more than 80 mm.
Minimum clearances for 2-stage (type BW 301.B +
BWS 301.B)
≥ 100
≥ 400
A
≥ 1500
B
Fig. 15
ASubject to on-site installation and site conditions
B■Without AC-Box:
≥ 100 mm
■With AC-Box (accessories, for installation to the
left of the heat pump):
≥ 400 mm (plus width of the AC-Box)
Note
■Observe clearances for installation and mainte-
nance.
■Additional strain relief clamps are required for the
power cables if the clearance behind the heat pump
is more than 80 mm.
Information on the use of accessories for a heat-
ing/cooling circuit or separate cooling circuit
AC-Box for active cooling function
■The AC-Box can only be used up to a rated heating
output of ≤ 17.6 kW. For higher rated heating out-
puts, install all the components required on site (with
correspondingly sized plate heat exchanger) for the
heating/cooling circuit or the separate cooling circuit.
NC-Box for natural cooling function
■The NC-Box can only be used up to a rated heating
output of ≤ 16 kW. For higher rated heating outputs,
install all the components required on site (with cor-
respondingly sized plate heat exchanger) for the
heating/cooling circuit or the separate cooling circuit.
■In 2-stage heat pumps, the NC-Box cannot be
installed immediately above the heat pump. The
hydraulic connection lines between heat pump
stage 1 and heat pump stage 2 are installed above
the heat pumps.
Preparing for installation
Siting and transport requirements (cont.)
5516461
Installation