Main Components Of The Indoor Unit Switch Box; Selecting An Installation Location; General Precautions On Indoor Installation Location - Daikin EKCBX008BBV3 Installation Manual

5.3. Main components of the indoor unit switch box

4 1
F2B
K3M
5
X4M
7
X3M
7
8
2
X14M
6 6 2
1. Main PCB
The main PCB (Printed Circuit Board) controls the functioning of
the unit.
2. Terminal blocks X2M, X14M, X15M
The terminal blocks allow easy connection of field wiring.
3. Thermistor interconnection cable connector
4. Booster heater contactor K3M (only for installations with a
domestic hot water tank installed)
5. Booster heater circuit breaker F1B (only for installations with a
domestic hot water tank installed)
The circuit breaker protects the booster heater in the domestic
hot water tank against overload or short circuit.
6. Cable tie mountings
The cable tie mountings allow to fix the field wiring with cable
ties to the switch box to ensure strain relief.
7. Terminal blocks X3M, X4M (only for installations with a domestic
hot water tank installed)
8. PCB fuse FU1
9. DIP switch SS2
The DIP switch SS2 provides 4 toggle switches to configure
certain installation parameters. See
overview" on page 21.
10. X13A socket
The X13A socket receives the K3M connector (only for
installations with a domestic hot water tank installed).
11. X9A socket
The X9A socket receives the thermistor connector (only for
installations with a domestic hot water tank installed).
12. Fuse FU2 (in line fuse)
13. Transformer TR1
14. A4P
Digital I/O PCB (only for installations with a solar kit or a digital
I/O PCB kit installed).
INFORMATION
The electric wiring diagram can be found on the inside of
the indoor unit front panel
Installation manual
6
14 13 9 3 10 11
A4P
TR1
SS2
X9A
X13A
FU1
FU2
X2M
6 6 12 6 2 6
"12.1. DIP switch settings
6. S
ELECTING AN INSTALLATION LOCATION
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit is suitable for installation in a commercial and
light industrial environment.

General precautions on indoor installation location

Refer to "2. General safety precautions" on page
The EKCB unit is to be wall mounted in an indoor location that meets
the following requirements:
■
The space around the unit is adequate for servicing. Refer to
"7.2. Service space of the indoor unit" on page
■
The space around the unit allows for sufficient air circulation.
■
The installation surface is a flat and vertical non-combustible
wall, capable of supporting the operation weight of the unit (refer
to the "Technical specifications" on page
■
During normal operation the control box may produce sound
which could be observed as noise. The sound origin can be
contactor activation. Therefore it is advisable to install the
control box 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).
■
The equipment is not intended for use in a potentially explosive
atmosphere.
■
Do not install the unit in places often used as work place.
In case of construction works (e.g. grinding works) where a lot of
dust is created, the unit must be covered.
■
Do not place any objects or equipment on top of the unit.
CAUTION
If the installation is equipped with a domestic hot water
tank (optional), please refer to the domestic hot water tank
installation manual.
2.
7.
44).
EKCBX/H008BBV3
Unit for air to water heat pump system
4PW66983-1C – 08.2011