Viessmann VITOCAL 300-G PRO Type BW 2150 Quick guide

Installation and service instructions
for contractors
Vitocal 300-G Pro
Type BW 301.B090 to 302.B250
Vitocal 300-W Pro
Type WW 301.B125 to 302.B300
For applicability, see the last page
VITOCAL 300-G PRO
VITOCAL 300-W PRO
5549 984 GB 9/2014 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
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
load 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.
Wait at least 4 minutes before removing equip-
ment covers, to allow the voltage to dissipate.
■Safeguard the system against reconnection.
!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 your
system.
Replace faulty components with genuine
Viessmann spare parts.
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 replacement, use only spare parts supplied
or approved by Viessmann.
Safety instructions
Safety instructions
5549 984 GB

3
1. Safety and liability Heat pump application limits .................................................................. 5
Occupational safety ............................................................................... 5
■Electrical connections ......................................................................... 5
■Working on the heat pump .................................................................. 6
■Work on the refrigerant circuit ............................................................. 6
Work on the casing ................................................................................ 7
2. Preparing for installation Use ........................................................................................................ 8
Product information ................................................................................ 8
■Vitocal 300-G/W Pro ........................................................................... 8
General information on electrical connection ......................................... 8
Delivery and installation ......................................................................... 9
■Unloading and handling ...................................................................... 9
■Handling by crane ............................................................................... 10
■Handling by forklift truck or pallet truck ............................................... 10
Siting ...................................................................................................... 11
■Installation room requirements ........................................................... 11
■Sound attenuating plinth ..................................................................... 12
■Pressure points □ of the adjustable heat pump feet ........................... 13
■Requirements for on-site connections ................................................ 14
■Hydraulic connection requirements .................................................... 17
Primary circuit: brine/water, 1-stage ...................................................... 17
■Type BW 301B.090, BW 301.B120 .................................................... 17
Primary circuit: brine/water, 2-stage ...................................................... 18
■Type BW 302.B090, BW 302.B120, BW 302.B150, BW 302.B180,
BW 302.B250 ..................................................................................... 18
Primary circuit: brine/water, cascade ..................................................... 19
■Type BW 301.B090 to BW 302.B250 ................................................. 19
Primary circuit: water/water, 1-stage/2-stage ......................................... 21
■Type WW 301.B125 to WW 302.B300 ............................................... 21
Water/water cascade, 1-stage/2-stage .................................................. 22
■Primary circuit: Water/water with separating heat exchanger, cas-
cade, type BW 301.B090 to BW 302.B250 ......................................... 22
Electrical installation scheme ................................................................. 25
Heat pump cascade: 1-stage/2-stage .................................................... 25
■Type BW 301.B090 to 302.B250 and WW 301.B125 to 302.B300 ..... 25
DHW heating ......................................................................................... 27
■Type BW 301.B090 to BW 302.B250 and WW 301.B125 to
WW 302.B300 .................................................................................... 27
■Required parameter settings for DHW heating ................................... 28
3. Installation sequence Siting the heat pump .............................................................................. 29
■Levelling the heat pump ..................................................................... 29
■Fitting the outer panels ....................................................................... 31
Making the hydraulic connections .......................................................... 32
■Overview of connections Type BW 301.B090 to BW 302.B250 ......... 32
■Overview of connections Type WW 301.B125 to WW 302.B300 ....... 32
■Heat pump connections ...................................................................... 33
■Connecting the primary circuit ............................................................ 35
■Connecting the secondary circuit ....................................................... 35
Making the electrical connection ............................................................ 36
Overview of electrical connections ........................................................ 37
■Terminal strip for system components ................................................ 38
■Main PCB with expansion PCB .......................................................... 38
■Message and safety connections (safety chain) with distribution ter-
minal ................................................................................................... 43
■Controller and sensor PCB ................................................................. 46
■Electric booster heater (on-site) ......................................................... 48
Index
Index
5549 984 GB

4
Power supply ......................................................................................... 48
■Control circuit power supply (230 V~) and power circuit (400 V~) ..... 49
■Electrical connection requirements ..................................................... 49
■Power supply with power-OFF ........................................................... 50
■Electronic soft starter, type SMC ........................................................ 51
Installing the programming unit .............................................................. 52
Closing the heat pump ........................................................................... 53
4. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 54
5. Troubleshooting Repairs .................................................................................................. 67
■Remove front panel ............................................................................ 67
■Overview of electrical components ..................................................... 67
■Overview of internal components, type BW 301.B090 to
BW 302.B250 ..................................................................................... 68
■Overview of internal components, type WW 301.B125 to
WW 302.B300 .................................................................................... 69
■Draining the heat pump on the primary/secondary side ..................... 70
■Checking sensors ............................................................................... 70
■Checking MCB/fuses .......................................................................... 71
■Appliance too noisy ............................................................................ 71
■Dismantling / Disposal ........................................................................ 71
6. Parts lists .................................................................................................................. 72
7. Commissioning/service
reports
Hydraulic parameters report .................................................................. 80
Control parameters report ...................................................................... 80
8. Specification Specification, type BW 301.B090 to BW 302.B250 ............................... 88
Specification, type WW 301.B125 to WW 302.B300 ............................. 91
9. Appendix Heat pump commissioning request ....................................................... 93
10. Certificates Declaration of conformity ....................................................................... 94
11. Keyword index .................................................................................................................. 96
Index
Index (cont.)
5549 984 GB

5
Intended use ■Generation of cooling and/or heating
■For use in industry, commerce, domestic households
System limit See pipework and instrumentation diagram, connection and wir-
ing diagram
Service life
Heat pump 15 to 25 years
Wearing parts (back-up battery and recharge-
able batteries, safety valve, filter dryer, refrig-
erant oil, compressor, filter, oil separator)
4 to 5 years, subject to hours run and operating point
Life cycle stages
System
user
External
personnel
Manufac-
turer
Refrigera-
tion engi-
neer
Logistics Electrician/
heating
contractor
Service en-
gineer
Disposal
contractor
Manufacture
X X
Delivery, moving, handling, siting
X X X X X
Installation
X X X
Commissioning
X X X X
Operation
X X
Service, repair, shutdown
X X X X X
Dismantling, removal, collection
X X X X X
Disposal
X X X
Occupational safety
Electrical connections
Danger
Electromagnetic radiation near the wiring cham-
ber of the heat pump control unit can interfere
with electrical devices such as heart pacemak-
ers and defibrillators.
■Wearers of heart pacemakers:
Avoid going anywhere near the heat pump
control unit wiring chamber; possibly consult
your physician.
■Store and use defibrillators outside the area at
risk.
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and in
appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■IEC 60364-4-41
■VDE regulations
■Technical connection requirements specified
by the local power supply utility
Safety and liability
Heat pump application limits
5549 984 GB
Service

6
Danger
Contact with 'live' components can lead to seri-
ous injury from electric current. Some compo-
nents on PCBs remain 'live' even after the
power supply has been switched off.
■Isolate the system from its power supply (e.g.
at a separate MCB/fuse or mains isolator),
check that there are no 'live' currents and
safeguard against reconnection.
Note
In addition to the control circuit there may be
several load circuits.
■Prior to removing the heat pump covers, wait
at least 4 min until the voltage has completely
dropped out.
■Never touch the terminal area of the heat
pump control unit or power connections (see
page 37).
Danger
The absence of component earthing can result
in serious injury from electrical current and in
component damage in the event of an electrical
fault.
■Always re-establish all earth connections of
the heat pump.
■The heat pump and pipework must be connec-
ted to the equipotential bonding of the build-
ing.
!Please note
Observe all information in the "Safety instruc-
tions".
Likewise in the chapters "Routing electrical
cables/leads to the heat pump wiring chamber"
(page 36) and "Power connection"
(page 48).
Working on the heat pump
!Please note
Prior to commissioning and following repair or
maintenance work check
that the heat pump is in the intended condition.
Danger
Falling of heavy or unwieldy heat pump compo-
nents can result in life threatening crushing or
breaks.
■Always use suitable ropes/slings and lifting
gear when installing/dismantling compressors,
heat exchangers and similar.
■Wear appropriate protective clothing (e.g.
safety boots) in compliance with applicable
regulations on accident prevention and in line
with trade association recommendations.
Work on the refrigerant circuit
Danger
Refrigerant circuits of heat pumps develop
extremely low (–25 °C) and very high (+130 °C)
temperatures. Work on heat pumps can result in
life threatening frostbite and burns.
■Switch off the heat pump at least 30 min
before working on it.
■If at all possible, avoid touching the injection
valve and compressor; wear safety gloves, if
contact is necessary.
■Wear suitable protective clothing.
Danger
R410A is a non-poisonous gas that displaces
air. Unregulated escape of refrigerant R410A in
enclosed spaces can result in difficulties in
breathing and suffocation.
■Never breathe in refrigerant vapours.
■Ensure adequate ventilation in enclosed
spaces.
■Prevent open flames.
■Always observe regulations and guidelines on
handling this type of refrigerant.
Safety and liability
Occupational safety (cont.)
5549 984 GB
Service

7
Danger
Direct contact with refrigerant can be harmful to
skin.
■Only work on the refrigerant circuit whilst
wearing safety goggles and safety gloves.
Note
Work on the refrigerant circuit must only be
carried out by a qualified refrigeration engi-
neer.
■Wear suitable protective clothing.
Work on the casing
Danger
Breaking through the knockouts on the back
panel leaves behind sharp edges from the metal
retaining tabs that can lead to life threatening
injuries.
■Finish and seal the edges appropriately before
installation.
Note
Damage to the surfaces of the casing can lead to cor-
rosion.
Safety and liability
Occupational safety (cont.)
5549 984 GB
Service

8
The heat pumps Vitocal 300-G Pro, type BW 301.B090
to 302.B250 and Vitocal 300-W Pro,
type WW 301.B125 to 302.B300 may be used for the
following purposes:
■Central heating and cooling via a heating system
■DHW heating
■Swimming pool heating
Any use that differs from or goes beyond this is consid-
ered inappropriate.
Note
The Vitocal 300-G/W Pro must be operated exclusively
by authorised and trained personnel.
Product information
Vitocal 300-G/W Pro
Heat pump Vitocal 300-G Pro, type BW Vitocal 300-W Pro type WW
Medium Brine/water Water/water
Single stage heat pumps 301.B090
301.B120
301.B125
301.B155
Two-stage heat pumps 302.B090
302.B120
302.B150
302.B180
302.B250
302.B125
302.B155
302.B200
302.B250
302.B300
Characteristics:
■Integral heat pump control unit Vitotronic 200,
type WO1C.
■The refrigerant circuit has an electronic expansion
valve (EEV) with an independent control circuit
(refrigerant circuit controller).
■The heat pump control unit can switch and regulate
one cooling circuit. The cooling circuit may be a
heating circuit prepared on site for cooling operation
or a separate cooling circuit.
■All sensors are fitted inside sensor wells.
■Electric booster heaters (on site) can be controlled
(e.g. instantaneous heating water heater, immersion
heater in heating water buffer cylinder).
A higher output in connection with additional
Vitocal 300-G Pro/Vitocal 300-W Pro (cascade) is pos-
sible.
General information on electrical connection
■Electrical connection of system components
(pumps, mixers, valves, message facilities, contac-
tors, function extensions, sensors etc.):
Connections are made inside the heat pump wiring
chamber. Observe information from page 37.
■Power supply:
The number of power cables from the meter box to
the heat pump wiring chamber depends on the sys-
tem version and tariffs used. See information from
page 48.
Preparing for installation
Use
5549 984 GB
Installation

9
■The Vitocal 300-G/W Pro is delivered as a standard
appliance. Side panels are packed separately for fit-
ting on site (page 29 to page 31).
■The programming unit of the Vitotronic 200 is deliv-
ered loose inside the wiring chamber and must be fit-
ted and connected on site (page 52).
■Accessories are delivered separately.
■The heat pump has been charged at the factory with
oil and refrigerant.
Unloading and handling
Note
Before unloading, have the recipient check the con-
signment for possible damage. Note down any dam-
age on the delivery note and notify the haulage con-
tractor.
■Lifting gear, such as slings and cross beams must be
provided on site.
■The lifting capacity of each sling and that of the cross
beam must be at least equal to the shipping weight,
see "Specification" (page 88).
■Suitable equipment for unloading the lorry must be
available on site, see the following chapter.
!Please note
Prevent equipment damage when unloading and
handling the heat pump:
■Never put weight on top of the appliance.
■To protect the paintwork, wrap the lifting gear
(such as ropes, cross beams) and place pad-
ding between the heat pump and lifting gear.
■Observe correct weight distribution when lift-
ing. Due to the heat exchangers, the heat
pump's centre of gravity is at the back, by the
hydraulic connections.
■Avoid impact and shocks to prevent damage
to the internal pipework of the heat pump.
■Avoid tipping the compressor severely, to pro-
tect the refrigerant circuit: Max. heat pump tilt-
ing angle 30°.
The KWT Kälte-Wärmetechnik AG, a member of the
Viessmann Group, will not accept any liability for
damage resulting from inappropriate handling.
Preparing for installation
Delivery and installation
5549 984 GB
Installation

10
Handling by crane
AA
B
C
D
Fig.1
ALifting shackle
BCross beam to relieve the load on the frame
CEdge protection (e.g. 2 or 3 layers of corrugated
cardboard)
DBelt strap suitable for the shipping weight
Note
Lifting with belt straps is only permitted without fitted
side panels and front or back panels.
Handling by forklift truck or pallet truck
Fig.2
Preparing for installation
Delivery and installation (cont.)
5549 984 GB
Installation

11
Information regarding transport with fork lift truck
■Select a fork length in line with the heat pump length,
see "Specification" (page 92).
■The heat pump's centre of gravity is at the back, by
the hydraulic connections.
■Observe required edge protection (e.g. 2 or 3 layers
of corrugated cardboard)
Note
Transport by fork lift truck is only permitted without fit-
ted side panels and front or back panels.
Siting
Installation room requirements
!Please note
The installation room must be dry and free from
the risk of frost.
Ensure ambient temperatures between 0 and
35 °C.
!Please note
Avoid risks of explosion due to dust, gases and
vapours
in the installation room.
!Please note
Observe the permissible floor load.
Total weight, type BW 301.B090 to
BW 302.B250:
BW 301.B090 700 kg
BW 301.B120 800 kg
BW 302.B090 705 kg
BW 302.B120 810 kg
BW 302.B150 1130 kg
BW 302.B180 1190 kg
BW 302.B250 1300 kg
Total weight, type WW 301.B125 to
WW 302.B300:
WW 301.B125 1015 kg
WW 301.B155 1055 kg
WW 302.B125 1035 kg
WW 302.B155 1060 kg
WW 302.B200 1330 kg
WW 302.B250 1380 kg
WW 302.B300 1425 kg
■To prevent the transmission of structure-borne noise,
never site the appliance on ceilings with wooden
joists (e.g. in the attic).
■Level the appliance.
Where floors are uneven, distribute the load evenly
across the adjustable feet.
■Observe minimum room volume (to EN 378).
Note
Additional, country-specific regulations apply.
Minimum room volume, type BW 301.B090 to
BW 302.B250:
BW 301.B090 54 m3
BW 301.B120 68 m3
BW 302.B090 53 m3
BW 302.B120 68 m3
BW 302.B150 86 m3
BW 302.B180 103 m3
BW 302.B250 122 m3
Minimum room volume, type WW 301.B125 to
WW 302.B300:
WW 301.B125 42 m3
WW 301.B155 49 m3
WW 302.B125 42 m3
WW 302.B155 49 m3
WW 302.B200 59 m3
WW 302.B250 65 m3
WW 302.B300 73 m3
■Observe the required floor area and minimum clear-
ances (see following chapter).
Preparing for installation
Delivery and installation (cont.)
5549 984 GB
Installation

12
Minimum clearances
A
B
CD
E
600
600
Fig.3
E
B
A
CD
600 600 600
CD
Fig.4
AClearance subject to on-site installation and loca-
tion
BClearance for installation and service (e.g. for
removing and cleaning the tubular heat exchang-
ers)
■Type BW: ≥ 500 mm
■Type WW: ≥ 2000 mm
CCable entries:
On-site strain relief clamps required (wall clear-
ance ≥ 80 mm).
D■When using hydraulic connection accessories
(connection set and Victaulic flange adaptor set,
2½" or 3" version):
≥ 1000 mm
■On-site hydraulic connections:
≥ 600 mm
E■Without anti-vibration parts (side sections):
≥ 855 mm
Note
When installing cascades (2 to 5 heat pumps), observe
the respective minimum clearances in accordance with
the preceding graphics.
Sound attenuating plinth
Position the heat pump on a base prepared on site for
the purpose of noise attenuation and even weight dis-
tribution.
Note
For corner installation, enlarge the base by the mini-
mum clearances (see chapter "Minimum clearances").
Preparing for installation
Siting (cont.)
5549 984 GB
Installation

13
150
A B
C
E D
Fig.5
AConcrete B25, iron
BFloor construction, screed
CTop edge unfinished floor
DImpact sound insulation as per regulations
EPressure-tested sound insulation layer, approx.
10 to 20 mm
Pressure points □ of the adjustable heat pump feet
Type BW 301.B090, BW 301.B120, BW 302.B090, BW 302.B120
1400
1000
1064
709
F
E
Fig.6
EPressure-tested sound insulation layer, approx.
10 mm
FFront of the heat pump
Type BW 302.B150, BW 302.B180, BW 302.B250, WW 301.B125, WW 301.B155, WW 302.B125 and
WW 302.B155
2040
1000
709
852 800
F
E
Fig.7
EPressure-tested sound insulation layer, approx.
10 mm
FFront of the heat pump
Preparing for installation
Siting (cont.)
5549 984 GB
Installation

14
Type WW 302.B200, WW 302.B250, WW 302.B300
1000
709
2640
F
E
1150 1090
Fig.8
EPressure-tested sound insulation layer, approx.
10 to 20 mm
FFront of the heat pump
Requirements for on-site connections
Dimensions, type BW 301.B090 to BW 301.B120, BW 302.B090 and BW 302.B120
Back panel BW-1 (SWEP)
1343
1650
911
A
B
D
E
H
1243
646
496 946
1093
368 367
GF
C
Fig.9
APrimary circuit brine inlet:
Victaulic 3"
B and CSecondary circuit flow:
Victaulic 2½"
DPrimary circuit brine outlet:
Victaulic 3"
ESecondary circuit return:
Victaulic 2½"
FLow voltage < 50 V
Preparing for installation
Siting (cont.)
5549 984 GB
Installation

15
GPower supply 230 V/50 Hz
HPower supply 400 V/50 Hz
Note
Observe the separately supplied dimensions for pipe
knock-outs.
Dimensions, type BW 302.B150 to BW 302.B250
Back panel BW-1 (SWEP)
911
1932
1650
A
B
DE
H
1243
646
496
946
1093
368 367
G
F
C
Fig.10
APrimary circuit brine inlet:
Victaulic 3"
B and CSecondary circuit flow:
Victaulic 2½"
DPrimary circuit brine outlet:
Victaulic 3"
ESecondary circuit return:
Victaulic 2½"
FLow voltage < 50 V
GPower supply 230 V/50 Hz
HPower supply 400 V/50 Hz
Note
Observe the separately supplied dimensions for pipe
knock-outs.
Combination of knock-outs to be used with back panel BW-1 (SWEP)
Type Knockouts applicable First knockout
BW 301.B090 A C D E C
BW 301.B120 A C D E C
BW 302.B090 A C D E C
BW 302.B120 A C D E C
BW 302.B150 A B D E B
BW 302.B180 A B D E B
BW 302.B250 A B D E B
Break through the relevant knockout and remove the
insulation. The knockout is connected with 3 retaining
tabs.
Danger
After removing the knockout, the torn-off edges
of the retaining tabs may cause injuries.
■Carefully file off the tab remnants.
■Then seal with a spot of paint or grease.
Preparing for installation
Siting (cont.)
5549 984 GB
Installation

16
Dimensions, type WW 301.B125 to WW 302.B300
Type WW 301.B125, WW 301.B155, WW 302.B125, WW 302.B155
911
1932
1650
280
288 344
435
1130
659
1089
A
B
C
D
E
FG
Fig.11
APrimary circuit flow (heat pump water inlet):
Victaulic 3"
BSecondary circuit flow:
Victaulic 2½"
CPrimary circuit return (heat pump water outlet):
Victaulic 3"
DSecondary circuit return:
Victaulic 2½"
EPower supply 400 V/50 Hz
FLow voltage < 50 V
GPower supply 230 V/50 Hz
Note
Observe the separately supplied dimensions for pipe
knock-outs.
Type WW 302.B200, WW 302.B250, WW 302.B300
911
2522
1650
280
288 344
435 1130
659
1089
A
B
C
D
E
FG
Fig.12
APrimary circuit flow (heat pump water inlet):
Victaulic 3"
BSecondary circuit flow:
Victaulic 2½"
CPrimary circuit return (heat pump water outlet):
Victaulic 3"
DSecondary circuit return:
Victaulic 2½"
Preparing for installation
Siting (cont.)
5549 984 GB
Installation

17
EPower supply 400 V/50 Hz
FLow voltage < 50 V
GPower supply 230 V/50 Hz
Note
Observe the separately supplied dimensions for pipe
knock-outs.
Hydraulic connection requirements
■Install hydraulic connections on site stress-free.
■Make the hydraulic connections between several
heat pumps on site.
■All components required for the cooling circuit must
be provided on site. This must be achieved with an
appropriately sized plate heat exchanger.
Primary circuit: brine/water, 1-stage
Type BW 301B.090, BW 301.B120
Hydraulic installation scheme
22
27
20
21
1
P1
P1
2
--KM BUS--
--230 V--
--F2--
--211.1-- --F3--
--224.2--
--2/211.1--
15
--LP1 X3.8;3.9--
--2/LP1 X3.8;3.9--
P
Fig.13
Preparing for installation
Siting (cont.)
5549 984 GB
Installation

18
Required equipment
Pos. Designation
1Heat pump
2Heat pump control unit
qT Primary pump (fail-safe)
wP Brine safety assembly
wQ Pressure switch, primary circuit
wW Brine distributor for geothermal probes/collectors
wU Geothermal probes
Note
If 2 primary pumps are used, at least 75 % of the nomi-
nal flow rate must be produced during partial load.
Electrical installation scheme
For a summary of electrical connections, see from page 37 and separate "Connection and wiring diagram".
Primary circuit: brine/water, 2-stage
Type BW 302.B090, BW 302.B120, BW 302.B150, BW 302.B180, BW 302.B250
Hydraulic installation scheme
22
27
20
21
1
15
--2/211.1--
P1
25
--2/224.2--
P1
2
--KM BUS--
--230 V--
--F2--
--211.1-- --F3--
--224.2--
--LP1 X3.8;3.9--
--2/LP1 X3.8;3.9--
P
Fig.14
Preparing for installation
Primary circuit: brine/water, 1-stage (cont.)
5549 984 GB
Installation

19
Required equipment
Pos. Designation
1Heat pump
2Heat pump control unit
qT Primary pump 1 (fail-safe)
wP Brine safety assembly
wQ Pressure switch, primary circuit
wW Brine distributor for geothermal probes/collectors
wT Optional: Primary pump 2 (fail-safe) for stage 2
Note
■Contactor relay required.
■Size primary pump 1 qT for partial load.
wU Geothermal probes
Electrical installation scheme
For a summary of electrical connections, see from
page 37 and separate "Connection and wiring dia-
gram".
Primary circuit: brine/water, cascade
Type BW 301.B090 to BW 302.B250
Hydraulic installation scheme
22
27
20
21
9
P1
25
P1
P1
15
2
--KM BUS--
--230 V--
--F2--
--211.1-- --F3--
--2/211.1--
--2/211.1--
P1
1
2
--KM BUS--
--230 V--
--F2--
--211.1-- --F3--
--LP1 X3.8;3.9--
--LP1 X3.8;3.9--
--2/LP1 X3.8;3.9--
P
Fig.15
Preparing for installation
Primary circuit: brine/water, 2-stage (cont.)
5549 984 GB
Installation

20
Equipment required
Pos. Designation
1Heat pump I
2Heat pump control unit with LON communication module (accessory)
9Heat pump II
qT Primary pump, heat pump I (fail-safe)
Note
For 2-stage Vitocal 300-G Pro, a primary pump can be used for stages 1 and 2 respectively. Ob-
serve minimum flow rate.
wP Brine safety assembly
wQ Pressure switch, primary circuit
wW Brine distributor, geothermal probes/collectors
wT Primary pump, heat pump II (fail-safe)
Note
For 2-stage Vitocal 300-G Pro, a primary pump can be used for stages 1 and 2 respectively.
wU Geothermal probes
Electrical installation scheme
For a summary of electrical connections, see from
page 37 and separate "Connection and wiring dia-
gram".
Preparing for installation
Primary circuit: brine/water, cascade (cont.)
5549 984 GB
Installation