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12. X9A socket
The X9A socket receives the thermistor connector (only for
installations with domestic hot water tank).
13. Pump fuse FU2 (in line fuse)
14. Pump relay K4M
15. Transformer TR1
16. A4P
Digital I/O PCB (only for installations with solar kit or digital I/O
PCB kit).
(1)
17. X6YA/X6YB/X6Y
Connectors for connecting to a normal kWh rate power supply.
See also
"Connection to a benefit kWh rate power supply" on
page
21.
NOTICE
The electrical wiring diagram can be found on the inside of
the switch box cover.
5.4. Functional diagram
2
3
4
5
R1T
t >
H
O
2
R3T
t >
1
12
1 Outdoor unit
2 Indoor unit
3 Expansion vessel
4 Manometer
5 Air purge valve
6 Pressure relief valve
7 Backup heater
8 Flow switch
9 Shut-off valve water outlet with drain valve (field
installation)
10 Shut-off valve water inlet with drain valve (field installation)
11 Filter
12 Heat exchanger
R1T Outlet water heat exchanger thermistor
R2T Outlet water backup heater thermistor
R3T Refrigerant liquid side thermistor
R4T Inlet water thermistor
(1) When the unit is configured for restricted power supply condition mode,
see
"Appendix" on page
50.
EKHBX008BB3V3S
Indoor unit for air to water heat pump system
4PW62597-1 – 10.2010
6 7
R2T
t >
R4T
t >
11
6.
I
NSTALLATION OF THE INDOOR UNIT
6.1. Selecting an installation location
WARNING
Be sure to provide for adequate measures in order to
prevent that the unit be used as a shelter by small animals.
CAUTION
■
Small animals making contact with electrical parts can
cause malfunctions, smoke or fire. Please instruct the
customer to keep the area around the unit clean and
clear.
■
The equipment is not intended for use in a potentially
explosive atmosphere.
■
Be sure that sufficient precautions are taken, in
accordance with the applicable legislation, in case of
refrigerant leakage.
■
When installing the unit in a small room, take
measures
concentration from exceeding allowable safety limits
in the event of a refrigerant leak.
Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
■
Where flammable gases may leak, where carbon fibre
or ignitable dust is suspended in the air or where
8
volatile flammables, such as thinner or gasoline, are
handled.
Such gases may cause a fire.
The unit is to be wall mounted in an indoor location that meets the
following requirements:
9
■
The installation location is frost-free.
■
The space around the unit is adequate for servicing.
figure
2).
■
The space around the unit allows for sufficient air circulation.
■
There is a provision for condensate drain (only for EKHBX
models with drain pan kit EKHBDP) and pressure relief valve
blow-off.
■
The installation surface is a flat and vertical non-combustible
10
wall, capable of supporting the operation weight of the unit (see
"12. Technical specifications" on page
■
All piping lengths and distances have been taken into
consideration.
Maximum allowable refrigerant piping length between
outdoor unit and indoor unit
Minimum required refrigerant piping length between
outdoor unit and indoor unit
Maximum allowable height difference between
outdoor unit and indoor unit
Maximum allowable distance between the 3-way
valve and the indoor unit (only for installations with
domestic hot water tank).
Maximum allowable distance between the domestic
hot water tank and the indoor unit (only for
installations with domestic hot water tank). The
thermistor cable supplied with the domestic hot water
tank is 12 m in length.
■
During normal operation the hydrobox unit will produce sound
which could be observed as noise. The sound origin can be
contactor activation. Therefore it is advisable to install the
hydrobox unit on a firm wall and not in nor close to a sound
sensitive environment (e.g. bedroom).
■
Do not install the unit in places with high humidity (e.g.
bathroom).
in
order
to
keep
the
49).
Requirement
Installation manual
refrigerant
(See
Value
30 m
3 m
20 m
3 m
10 m
12
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