Installation; Opening The Units; To Open The Indoor Unit And Switch Box Cover - Daikin ERHQ-BW1 Installer's Reference Manual

Item Description
Outdoor unit and indoor unit power supply
1 Power supply for
outdoor unit
2 Power supply and
interconnection cable
to indoor unit
3 Power supply for
backup heater
4 Preferential kWh rate
power supply (voltage
free contact)
5 Normal kWh rate power
supply
User interface
6 User interface
Optional equipment
11 Power supply for
bottom plate heater
12 Room thermostat
13 Outdoor ambient
temperature sensor
14 Indoor ambient
temperature sensor
15 Heat pump convector
Field supplied components
16 Shut-off valve
17 Electricity meter
18 Domestic hot water
pump
19 Alarm output
20 Changeover to external
heat source control
21 Space cool/heat
operation control
22 Power consumption
digital inputs
(a) Refer to name plate on outdoor unit.
(b) Minimum cable section 0.75 mm².
(c) Cable section 2.5 mm².
(d) Cable section 0.75 mm² till 1.25 mm²; maximum length: 50 m.
Voltage-free contact shall ensure the minimum applicable load of
15 V DC, 10 mA.
(e) Cable section 0.75 mm² till 1.25 mm²; maximum length: 500 m.
Applicable for both single user interface and dual use interface
connection.
Backup heater
type Power supply
*3V 1x 230 V
*9W 1x 230 V
3x 230 V
3x 400 V
EHVH/X16
Daikin Altherma - Low Temperature Split
4P313777-1 – 2012.05
Maximum
running
Wires current
2+GND or
(a)
3+GND
3 (c)
See table below. —
2
(d)
2 6.3 A
2
(e)
2
(b)
3 or 4 (b)
100 mA
2 (b)
2
(b)
4
(b)
100 mA
2
(b)
2 (per meter) (b)
2
(b)
2 (b)
2
(b)
2 (b)
2 (per input
(b)
signal)
Required number of
conductors
2+GND
2+GND + 2 bridges
3+GND + 1 bridge
4+GND
7

Installation

7.1

Opening the units

7.1.1 To open the indoor unit and switch box
cover
1 Loosen and remove the screws at the bottom of the unit.
2 Slide the front panel of the unit downwards and remove it.
3 Loosen and remove the 4 screws that fix the top panel.
4 Remove the top panel from the unit.
3
4x
4
2
2x
1
5 Loosen and remove the 4 screws that fix the switch box cover.
6 Remove the switch box cover.
4x
7 Installation
Installer reference guide
22