Hot water heater
Connecting the hot water heater
NOTE
If F1145 is not docked to a water heater or if it
is to work with fixed condensing, the connection
for the water heater (XL9) must be plugged.
႑
Any docked hot water heater must be fitted with ne-
cessary set of valves.
႑
The mixing valve must be installed if the setting is
changed so that the temperature can exceed 60 °C.
The setting is made in menu 5.1.1 (page 58)
႑
The safety valve must have a maximum 1.0 MPa (10.0
bar) opening pressure and be installed on the incom-
ing domestic water line as illustrated. The entire length
of the overflow water pipe from the safety valves must
be inclined to prevent water pockets and must also
be frost proof.
Caution
Hot water production is activated in menu 5.2
or in the start guide.
Fixed condensing
If F1145 is to work towards the water heater with fixed
condensing you must connect an external flow sensor
(BT25) according to the description on page 20. In addi-
tion, you must perform the following menu settings.
Menu setting (local vari-
ations may be required)
Menu
50 °C1.9.3 - min. flow line temp.
same as above5.1.2 - max flow line temper-
ature
3°C5.1.3 - max diff flow line
temp., max diff compressor
2°C5.1.3 - max diff flow line
temp., max diff addition
intermittent5.1.10 - op. mod heat med
pump
manual4.2 - op. mode
Docking alternatives
F1145 can be connected in several different ways, some
of which are shown below.
Further option information is available at www.nibe.co.uk
and in the respective assembly instruction for the access-
ory used. See page 72 move the list of the accessories
that can be used to F1145.
Buffer vessel
If the climate system volume is too small for the heat
pump output, the radiator system can be supplemented
with a buffer vessel, for example NIBE UKV.
T
UKV
Ventilation recovery
The installation can be supplemented with the exhaust
air module FLM to provide ventilation recovery.
႑
Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation.
႑
The brine system must be supplied with a pressure
expansion vessel (CM3). If there is a level vessel (CM2)
this should be replaced.
Frånluft
Ø 160
Avluft
Ø 160
P
([WUDFW DLU
([KDXVW
DLU
)/0
NIBE™ F1145Chapter 4 | Pipe connections14
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