Nibe F370 User guide

Installer manual
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NIBE™ F370
Exhaust air heat pump
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A detailed explanation of the button functions can be found on page 38.
How to scroll through menus and make different settings is described on page 40.
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The mode for setting the indoor temperature is reached, when in the start mode in the main menu, by pressing the
OK button twice. Read more about the settings on page 42.
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To temporarily increase the amount of hot water, first turn the control knob to mark menu 2 (water droplet) and then
press the OK button twice. Read more about the settings on page 48.
In event of disturbances in comfort
If a disturbance in comfort of any type occurs there are some measures that can be taken before you need to contact
your installer. See page 62 for instructions.

Table of Contents
1 Important information 2
Safety information 2
2 Delivery and handling 9
Transport 9
Assembly 9
Supplied components 10
Removing the covers 10
Removing parts of the insulation 10
3 The heat pump design 11
4 Pipe and ventilation connec-
tions 15
General pipe connections 15
Dimensions and pipe connections 16
Cold and hot water 17
Heating medium side 17
Installation alternative 18
General ventilation connection 19
Ventilation flow 19
Adjusting ventilation 19
5 Electrical connections 20
General 20
Connections 22
Settings 24
Optional connections 25
Connecting accessories 27
6 Commissioning and adjusting 28
Preparations 28
Filling and venting 28
Start-up and inspection 29
7 Control - Introduction 38
Display unit 38
Menu system 39
8 Control - Menus 42
Menu 1 - INDOOR CLIMATE 42
Menu 2 - HOT WATER 48
Menu 3 - INFO 50
Menu 4 - HEAT PUMP 51
Menu 5 - SERVICE 54
9 Service 58
Service actions 58
10 Disturbances in comfort 62
Info-menu 62
Manage alarm 62
Troubleshooting 62
11 Accessories 64
12 Technical data 65
Dimensions and setting-out coordinates 65
Technical specifications 66
Electrical circuit diagram 68
Item register 80
1Table of Contents |NIBE™ F370

Safety information
This manual describes installation and service procedures
for implementation by specialists.
This appliance is not intended for use by persons (includ-
ing children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concern-
ing use of the appliance by a person responsible for their
safety.
Children should be supervised to ensure that they do not
play with the appliance.
Rights to make any design or technical modifications are
reserved.
©NIBE 2010.
Symbols
NOTE
This symbol indicates danger to machine or
person.
Caution
This symbol indicates important information
about what you should observe when maintain-
ing your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
F370 is CE marked and fulfils IP21.
The CE marking means that NIBE ensures that the product
meets all regulations that are placed on it based on relev-
ant EU directives. The CE mark is obligatory for most
products sold in the EU, regardless where they are made.
IP21 means that the product can be touched by hand,
that objects with a diameter larger than or equivalent to
12.5 mm cannot penetrate and cause damage and that
the product is protected against vertically falling drops.
Handling
The heat pump contains highly inflammable refrigerant.
Special care should be exercised during handling, install-
ation, service, cleaning and scrapping to avoid damage
to the refrigerant system and in doing so reduce the risk
of leakage.
NOTE
Work on the refrigerant system must be done
by authorised personnel in accordance with the
relevant legislation on refrigerants, supplemen-
ted by additional requirements for flammable
gas, for example, product knowledge as well as
service instruction on gas systems with flam-
mable gases.
Safety precautions
Wiring
Check that cabling will not be subject to wear, corrosion,
excessive pressure, vibration, sharp edges or any other
adverse environmental effects. The check shall also take
into account the effects of aging or continual vibration
from sources such as compressors or fans.
When working in the refrigerant circuit
Pipe installation should be kept to a minimum.
Connections in the refrigerant circuit must be carried out
as follows:
႑Soldered, welded or mechanical connections must be
made before the valves are opened to allow the refri-
gerant to flow between the cooling system parts. The
system must be equipped with a vacuum valve to re-
lieve connecting pipes and/or any unfilled parts of the
cooling system.
႑Reusable mechanical connectors and collared joints
are not permitted indoors.
႑Refrigerant pipes must be protected or recessed to
prevent damage.
႑Must be accessible for future maintenance.
National gas regulations must be observed.
Maximum amount of refrigerant: See Technical specifica-
tions.
႑Everyone who works with or opens a refrigerant circuit
must have a current, valid certificate from an accred-
ited industry issuing body, which states that, according
to the industry's recognised assessment standard,
they have the authority to safely handle refrigerants.
႑Servicing must only be performed according to the
equipment manufacturer's recommendations.
Maintenance and repairs that require the assistance of
another trained person must be carried out under the
supervision of person with the authority to handle com-
bustible refrigerants.
Maintenance and repair that requires the skill of another
person must be carried out under the supervision of
someone with the above expertise.
NIBE™ F370Chapter 1 | Important information2
1 Important information

Before work is started on systems that contains combust-
ible refrigerants, safety checks must be performed to
ensure that the ignition risk is kept to a minimum.
The work must be carried out in a controlled way to
minimise the risk of contact with combustible gas or liquid
during the work.
All maintenance staff and those who work in close prox-
imity to the product must be instructed which type of
work is to be carried out. Avoid carrying out work in en-
closed spaces. The area surrounding the worksite must
be cordoned off. Ensure that the area is made safe by
removing combustible material.
Check whether there is refrigerant in the area using a
suitable refrigerant detector prior to and during work, to
notify the service technician whether there is a possible
flammable atmosphere or not. Ensure that the refrigerant
detector is suitable for combustible refrigerant, i.e. does
not generate sparks or cause ignition in any other way.
If hot work is carried out on the heat pump, a powder
or carbon dioxide fire extinguisher must be to hand.
Those who carry out work with refrigerant system con-
nections, including exposing pipes that contain or have
contained combustible refrigerant, may not use potential
ignition sources in such a way that that can lead to risks
of fire or explosions.
All potential ignition sources, including cigarette smoking,
should be kept at a safe distance from the service work
area where combustible refrigerant can leak out. Before
carrying out work, the area surrounding the equipment
must be checked to ensure that there are no ignition
risks. "No smoking" signs must be displayed.
Ensure that the work is carried out outdoors or that the
work area is ventilated before the system is opened and
before any hot work is carried out. The area must be
ventilated whilst the work is being carried out. There must
be ventilation around any refrigerant that comes out,
which should be routed outdoors.
If electrical components are replaced, the replacement
parts must be fit for purpose and have the correct tech-
nical specifications. Always follow the manufacturer's
guidelines regarding maintenance and servicing. Contact
the manufacturer's technical department in the event of
any doubts.
The following checks must be carried out for installations
that use combustible refrigerants.
႑The filling quantity is appropriate for the size of the
space where the parts that contain refrigerant are in-
stalled.
႑Ventilation equipment and outlet work correctly and
without obstructions.
႑If an indirect refrigerant circuit is used, check whether
the secondary circuit contains refrigerant.
႑All markings of equipment are visible and clear.
Markings, signs and similar that are not clear must
be replaced.
႑Refrigerant pipes and components are positioned in
such a way that it is not likely that they be subjected
to substances that can corrode components contain-
ing refrigerant, if these components are not made of
material that is resistant against corrosion, or not ap-
propriately protected against such corrosion.
Repair and maintenance of electrical components must
include initial safety checks and procedures for compon-
ent inspection. In the event of a fault, which can cause
a safety risk, do not supply any power to the circuit until
the fault has been rectified. If the fault cannot be rectified
immediately, and operation must continue, an adequate
temporary solution must be implemented. This must be
reported to the equipment owner, so that all parties have
been informed.
The following checks must be carried out at the initial
safety checks.
႑That the capacitors are discharged. Discharging must
be done safely, to prevent the risk of sparking.
႑That no powered electrical components or live cables
are exposed when filling or collecting refrigerant or
when the system is flushed.
႑That the system is continually grounded.
Removal and draining
When a cooling circuit is opened for repairs – or for an-
other reason– work must be carried out in a conventional
manner. Due to the risk of fire it is important that best
practice is applied. Follow the procedure below.
1. Drain the refrigerant.
2. Flush the circuit with inert gas.
3. Drain the circuit.
4. Flush again with inert gas.
5. Open the circuit by cutting or burning.
Collect the refrigerant in the intended container. Flush
the system with oxygen-free nitrogen to make the device
safe. This process may need to be repeated several times.
Compressed air and oxygen may not be used.
Flush the system by breaking the vacuum with oxygen-
free nitrogen, and filling the system to working pressure,
relieving the pressure to atmospheric pressure and finally
pumping to vacuum. Repeat the process until no refriger-
ant remains in the system. After the final filling of oxygen-
free nitrogen, relieve the pressure in the system to atmo-
spheric pressure, so that work can be carried out. This
type of flushing must be carried out if hot work is to be
performed on the pipe system.
3Chapter 1 | Important informationNIBE™ F370

Ensure that the vacuum pump's outlet is not near to igni-
tion sources and that there is satisfactory ventilation by
the outlet.
Filling
In addition to the conventional filling procedures, the
following actions must be taken.
႑Ensure that different refrigerants are not mixed when
filling equipment is used. Hoses and lines must be as
short as possible to minimise the enclosed refrigerant
volume.
႑Containers must be stored upright.
႑Ensure that the cooling system is grounded before
the system is filled with refrigerant.
႑Mark the system once filling is complete (if not already
marked).
႑Take extra care not to overfill the cooling system.
Before refilling the system, pressure test it with oxygen-
free nitrogen. Leak test the system after filling but before
using the system. Perform an additional leak test before
leaving the installation.
Leak testing
The following leak detection methods are deemed accept-
able for systems containing flammable refrigerants.
Electronic leak detectors shall be used to detect flam-
mable refrigerants, but the sensitivity may not be ad-
equate, or may need re-calibration. (Detection equipment
shall be calibrated in a refrigerant-free area.) Ensure that
the detector is not a potential source of ignition and is
suitable for the refrigerant used. Leak detection equip-
ment shall be set at a percentage of the LFL of the refri-
gerant and shall be calibrated to the refrigerant employed
and the appropriate percentage of gas (25 % maximum)
is confirmed.
Leak detection fluids are suitable for use with most refri-
gerants but the use of detergents containing chlorine
shall be avoided as the chlorine may react with the refri-
gerant and corrode the copper pipe-work.
If a leak is suspected, all naked flames shall be removed/ex-
tinguished.
If a leakage of refrigerant is found which requires brazing,
all of the refrigerant shall be recovered from the system,
or isolated (by means of shut off valves) in a part of the
system remote from the leak. Oxygen free nitrogen (OFN)
shall then be purged through the system both before and
during the brazing process.
Decommissioning
Before performing this procedure, the technician must
be familiar with the equipment and all its component
parts. Good practice prescribes that all refrigerant is col-
lected safely. Before the work is carried out, samples of
oil and refrigerant must be taken, if analyses are required
before collected refrigerant can be reused. There must
be a power supply when this task is started.
1. Familiarise yourself with the equipment and its use.
2. Isolate the system electrically.
3. Before starting the procedure, ensure that:
necessary equipment for mechanical handling of the
refrigerant container is available
all necessary personal safety equipment is available
and used correctly
the collection process is continuously supervised by
an authorised person
the collection equipment and containers meet appro-
priate standards.
4. Pump the refrigerant system to vacuum, if possible.
5. If it is not possible to pump to vacuum, manufacture
a branch, so that the refrigerant can be retrieved
from different parts of the system.
6. Check that the refrigerant container is on the scales
before starting to collect.
7. Start the collection device and collect according to
the manufacturer's instructions.
8. Do not overfill the containers (max 80 % (volume)
liquid content).
9. Do not exceed the containers' maximum permitted
working pressure – not even temporarily.
10. When the containers have been filled correctly and
the process is complete, close all shut-off valves in
the equipment and remove and containers and
equipment from the installation immediately.
11. The collected refrigerant must not be filled in any
other system before being cleaned and checked.
Marking
The equipment must be marked stating that it has been
taken out of operation and drained of refrigerant. The
marking must be dated and signed. Check that the
equipment is marked indicating that it contains combust-
ible refrigerant.
Collection
Best practice prescribes that all refrigerant is collected
safely when the refrigerant is drained from a system,
either for servicing or for decommissioning.
The refrigerant must only be collected in suitable refriger-
ant containers. Ensure that the required number of con-
tainers, that can hold the entire volume of the system,
are available. All containers that are to be used must be
intended for the collection of the refrigerant and marked
for this refrigerant (especially designed for the collection
of refrigerant). The containers must have the correctly
functioning relief valves and shut-off valves. Empty collec-
NIBE™ F370Chapter 1 | Important information4

tion containers must be drained and, if possible, chilled
before collection.
The collection equipment must function correctly and
instructions for the equipment must be to hand. The
equipment must be suitable for the collection of combust-
ible refrigerant.
Fully functioning and calibrated scales must also be to
hand.
Hoses must be in good condition and be equipped with
leak proof quick-couplings. Before using the collecting
machine, check that it works correctly and has been well
maintained, and that corresponding electrical components
are sealed, to prevent ignition if any refrigerant should
come out. Contact the manufacturer in the event of any
doubts.
Return the collected refrigerant to the refrigerant supplier
in the correct collection container and with the relevant
Waste Transfer Note. Do not mix refrigerants in collection
devices or containers.
If compressors/compressor oil are/is to be removed ensure
that the affected device is drained to an acceptable level
to ensure that no combustible refrigerant remains in the
lubricant. Compressors must be drained before being
returned to the supplier. Only electrical heating of the
compressor housing may be used to quicken draining.
Drain oil from the system in a safe manner.
Serial number
The serial number can be found at the bottom right of
the front cover and in the info menu (menu 3.1).
6HULDO QXPEHU
Caution
Always give the product's serial number when
reporting a fault.
Country specific information
Installer manual
This installer manual must be left with the customer.
5Chapter 1 | Important informationNIBE™ F370

NIBE™ F370Chapter 1 | Important information6

Inspection of the installation
Current regulations require the heating installation to be inspected before it is commissioned. The inspection must be
carried out by a suitably qualified person. Fill in the page for information about installation data in the User manual.
DateSignatureNotesDescription
✔
Ventilation (page 19)
Setting the ventilation flow
Connecting ground cables
Heating medium (page 17)
System flushed
System vented
Circulation pump setting
Setting heating medium flow
Boiler pressure
Electricity (page 20)
Fuses heat pump
Fuses property
Outside sensor
Room sensor
Current sensor
Safety breaker
Earth circuit-breaker
Miscellaneous
Guarantee submitted
7Chapter 1 | Important informationNIBE™ F370
..........................................................................................................................................................................................................................................................................................................................................................................................
.

Contact information
KNV Energietechnik GmbH, Gahberggasse 11, 4861 SchörflingAT
Tel: [phone] Fax: [phone] E-mail: [email protected] www.knv.at
NIBE Wärmetechnik AG, Winterthurerstrasse 710, CH-8247 FlurlingenCH
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.ch
Druzstevni zavody Drazice s.r.o, Drazice 69, CZ - 294 71 Benatky nad JizerouCZ
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.cz
NIBE Systemtechnik GmbH, Am Reiherpfahl 3, 29223 CelleDE
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.de
Vølund Varmeteknik A/S, Member of the Nibe Group, Brogårdsvej 7, 6920 VidebækDK
Tel: [phone] Fax: [phone] E-mail: [email protected] www.volundvt.dk
NIBE – Haato OY, Valimotie 27, 01510 VantaaFI
Puh: 09-274 697 0 Fax: [phone] E-mail: [email protected] www.nibe.fi
NIBE Energy Systems Ltd, 3C Broom Business Park, Bridge Way, Chesterfield S41 9QGGB
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.co.uk
NIBE Energietechniek B.V., Postbus 2, NL-4797 ZG WILLEMSTAD (NB)NL
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibenl.nl
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 OsloNO
Tel. sentralbord: +47 02320 E-mail: [email protected] www.nibeenergysystems.no
NIBE-BIAWAR Sp. z o. o. Aleja Jana Pawła II 57, 15-703 BIAŁYSTOKPL
Tel: [phone] Fax: [phone] E-mail: [email protected] www.biawar.com.pl
© "EVAN" 17, per. Boynovskiy, Nizhny NovgorodRU
Tel./fax [phone] E-mail: [email protected] www.nibe-evan.ru
NIBE AB Sweden, Box 14, Järnvägsgatan 40, SE-285 21 MarkarydSE
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.se
For countries not mention in this list, please contact Nibe
Sweden or check www.nibe.eu for more information.
NIBE™ F370Chapter 1 | Important information8

Transport
F370 should be transported and stored vertically in a dry
place. The F370 may, however, be carefully laid on its
back when being moved into a building. The centre of
gravity is in the upper part.
R
0
R
0
Assembly
႑Position the heat pump on a firm base that can bear
its weight, preferably on a concrete floor or founda-
tion. Use the heat pump’s adjustable feet to obtain
a horizontal and stable set-up.
30 - 50 mm
႑The area where the heat pump is located must be
equipped with floor drainage.
႑Install with its back to an outside wall, ideally in a
room where noise does not matter, in order to elim-
inate noise problems. If this is not possible, avoid
placing it against a wall behind a bedroom or other
room where noise may be a problem.
႑Wherever the unit is located, walls to sound sensitive
rooms should be fitted with sound insulation.
႑Route pipes so they are not fixed to an internal wall
that backs on to a bedroom or living room.
Installation area
Leave a space of 500 mm in front of the heat pump.
Approx 50 mm free space is required in order to open
the side hatches. The hatches do not need to be opened
during service, all service on F370 can be carried out from
the front.
500
10–25*
(50) (50)
*Depending on routing of supply cables and pipes.
NOTE
Ensure that there is sufficient space (300 mm)
above the heat pump for installing ventilation
hoses.
9Chapter 2 | Delivery and handlingNIBE™ F370
2 Delivery and handling

Supplied components
Room sensorOutside sensor
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Current sensorEarth cable
Location
The kit of supplied items is placed on top of the product.
Removing the covers
Front cover
4
1
2
3
1. Remove the air treatment hatch by pulling it straight
out.
2. Remove the screws from the lower edge of the front
cover.
3. Lift the cover out at the bottom edge and up.
4. Pull the hatch towards yourself.
Side covers
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The side covers can be removed to facilitate the installa-
tion.
1. Remove the screws from the upper and lower edges.
2. Twist the cover slightly outward.
3. Move the cover backwards and slightly to the side.
4. Pull the cover to one side.
5. Pull the cover forwards.
Removing parts of the insula-
tion
Parts of the insulation can be removed to facilitate the
installation.
Insulation, top
1. Grip the handle and pull straight out as illustrated.
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NIBE™ F370Chapter 2 | Delivery and handling10

F370, copper
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11Chapter 3 | The heat pump designNIBE™ F370
3 The heat pump design

F370, enamel
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NIBE™ F370Chapter 3 | The heat pump design12

F370, stainless steel
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13Chapter 3 | The heat pump designNIBE™ F370

Pipe connections
Connection, heating medium flow lineXL 1
Connection, heating medium return lineXL 2
Connection, cold waterXL 3
Connection, hot waterXL 4
Connection, docking inXL 8
Ventilation connection, exhaust airXL 31
Ventilation connection, extract airXL 32
HVAC components
Expansion vesselCM 1
Safety valve, hot water heaterFL 1
Safety valve, climate systemFL 2
Vacuum valve**FL 6
Mixer valve, hot water***FQ 1
Circulation pumpGP 1
Filler valve, hot water heaterQM 10
Filler valve, climate systemQM 11
Venting, climate systemQM 20
Shut-off valve, heating medium flowQM 31
Shut off valve, heating medium returnQM 32
Shunt valveQN 11
TundishWM 1
Overflow water dischargeWM 2
Overflow pipe, safety valve hot water heaterWP 1
Overflow pipe, safety valve climate systemWP 2
Condensation lead off, fan boxWP 3
Sensors etc.
High pressure pressostatBP 1
Low pressure pressostatBP 2
Pressure gauge, heating systemBP 5
Outdoor temperature sensor*BT 1
Temperature sensors, heating medium flowBT 2
Temperature sensors, heating medium returnBT 3
Temperature sensor, hot water, controlBT 6
Temperature sensor, hot water, displayBT 7
Temperature sensor, evaporatorBT 16
Temperature sensor, compressor operationBT 18
Temperature sensor, immersion heater operationBT 19
Temperature sensor, exhaust airBT 20
Temperature sensor, extract airBT 21
Thermostat, backup heatingBT 30
Room temperature sensor*BT 50
Electrical components
Immersion heater cardAA 1
Base cardAA 2
Input circuit boardAA 3
Display unitAA 4
AA4-XJ3 USB socket
AA4-XJ4 Service socket
Sacrificial anode card****AA 8
CapacitorCA 1
Immersion heaterEB 1
Compressor heaterEB 10
Miniature circuit-breakerFA 1
Temperature limiterFD 1
Shunt motor with hand wheelMA 1
SwitchSF 1
Cooling components
EvaporatorEP 1
CompressorGQ 10
Drying filter*HZ 2
Expansion valve*QN 1
Ventilation
Exhaust air fanGQ 2
Exhaust air filter*HQ 10
Filter cover, exhaust airUR 1
Miscellaneous
Rating platePF 1
Serial number platePF 3
Cable glandUB1
Cable glandUB2
* Not visible in the image
** Only heat pumps with copper vessel.
*** Only heat pumps with stainless steel vessel.
**** Only heat pumps with enamelled vessel.
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
NIBE™ F370Chapter 3 | The heat pump design14

General pipe connections
Pipe installation must be carried out in accordance with
current norms and directives.
The system requires a low-temperature design of the ra-
diator circuit. At lowest dimensioned outdoor temperature
(DUT) the highest recommended temperatures are 55 °C
on the flow line and 45 °C on the return line.
Overflow water from the evaporator collection tray and
safety valves goes via non-pressurised collecting pipes to
a drain so that hot water splashes cannot cause injury.
The entire length of the overflow water pipe must be in-
clined to prevent water pockets and must also be frost
proof.
NOTE
The pipe system needs to be flushed out before
the heat pump is connected so that any debris
cannot damage component parts.
Maximum boiler and radiator volumes
H
The volume of the pressure expan-
sion vessel (CM1) is 10 litres and it
is pressurised as standard to 0.5 bar
((5 mvp). As a result, the maximum
permitted height "H" between the
vessel and the highest radiator is 5
metres; see figure.
If the standard initial pressure in the
pressure vessel is not high enough
it can be increased by adding air via
the valve in the expansion vessel.
The initial pressure of the expansion
vessel must be stated in the inspection document. Any
change in the initial pressure affects the ability of the
expansion vessel to handle the expansion of the water.
The maximum system volume excluding the boiler is 219
litres at the above pre-pressure.
System diagram
F370 consists of a heat pump, water heater, immersion
heater, circulation pump and control system. F370 is
connected to ventilation system and heating medium
circuits.
When the exhaust air at room temperature passes
through the evaporator, the refrigerant evaporates be-
cause of its low boiling point. In this way the energy in
the room air is transferred to the refrigerant.
The refrigerant is then compressed in a compressor,
causing the temperature to rise considerably.
The warm refrigerant is led to the condenser. Here the
refrigerant gives off its energy to the boiler water,
whereupon the refrigerant changes state from gas to li-
quid.
The refrigerant then goes via filters to the expansion valve,
where the pressure and temperature are reduced.
The refrigerant has now completed its circulation and
returns to the evaporator.
;/;/;/;/;/
Connection, heating medium flowXL 1
Connection, heating medium returnXL 2
Connection, cold waterXL 3
Connection, hot waterXL 4
Connection, dockingXL 8
15Chapter 4 | Pipe and ventilation connectionsNIBE™ F370
4 Pipe and ventilation connections

Symbol key
MeaningSymbol
Venting valve
Shut-off valve
Non-return valve
Shunt / shuttle valve
Safety valve
Trim valve
Temperature sensor
Expansion vessel
Pressure gauge
P
Circulation pump
Particle filter
Fan
Compressor
Heat exchanger
Dimensions and pipe connec-
tions
B
A
C
Copper
:0 ;/ ;/;/;/;/
Enamel
:0 ;/ ;/;/;/;/
NIBE™ F370Chapter 4 | Pipe and ventilation connections16

Stainless steel
:0 ;/ ;/;/;/;/
Setting out dimensions
CBAConnection, copper
70400140(mm)XL1 Heating medium supply
365425120(mm)XL2 Heating medium return
210455165(mm)XL3 Cold water
260400170(mm)XL4 Hot water
295290175(mm)XL8 Docking
42020060(mm)WM1 Drip tray
CBAConnection, enamel
70400140(mm)XL1 Heating medium supply
365425120(mm)XL2 Heating medium return
210455165(mm)XL3 Cold water
260400170(mm)XL4 Hot water
295290175(mm)XL8 Docking
42020060(mm)WM1 Drip tray
CBAConnection, stainless
steel
70400140(mm)XL1 Heating medium supply
365425120(mm)XL2 Heating medium return
210455165(mm)XL3 Cold water
260400140(mm)XL4 Hot water
295290175(mm)XL8 Docking
42020060(mm)WM1 Drip tray
Pipe dimensions
Connection
22(mm)Heating medium ext Ø
22(mm)Cold water ext Ø
22(mm)Hot water ext Ø
22(mm)Docking ext Ø
32(mm)Overflow water discharge
Cold and hot water
Connecting cold and hot water
The mixing valve must be installed if the factory setting
is changed so that the temperature can exceed 60 °C. If
the factory setting is changed, national regulations must
be observed. The setting is made in menu 5.1.1 (page
55).
Heating medium side
Connecting the climate system
When connecting to a system with thermostats on all
radiators/underfloor heating coils, a relief valve must be
fitted, or a thermostat must be removed to ensure suffi-
cient flow.
17Chapter 4 | Pipe and ventilation connectionsNIBE™ F370

Installation alternative
F370 can be connected in several different ways, some
of which are shown below.
Further option information is available at www.nibe.eu
and in the respective assembly instructions for the ac-
cessories used. See page 64 for a list of the accessories
that can be used with F370.
Extra hot water heaters
The heat pump should be supplemented with an electric
water heater, if a hot tub or other significant consumer
of hot water is installed.
Two or more climate systems
When more than one climate system is to be heated, the
following connection can be used.
The ECS 40/ECS 41. accessory is required for this connec-
tion.
Connecting hot water circulation
To reduce the risk of bacterial growth in systems with
hot water circulation, the temperature of the circulating
water should not fall below 50 °C. There should not be
any non-circulatory hot water pipes. Adjust the hot water
system so that the temperature does not fall below 50
°C at the ends of the system.
The circulation pump for hot water circulation can be
controlled by the heat pump. The HWC return can be
connected to a freestanding water heater.
NIBE™ F370Chapter 4 | Pipe and ventilation connections18