Electrical Installation; About Connecting The Electrical Wiring; Precautions When Connecting The Electrical Wiring - Daikin 3MXM40A2V1B9 Installer's Reference Manual

9 Electrical installation

In this chapter

9.1 About connecting the electrical wiring

9.1.1 Precautions when connecting the electrical wiring

2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
4P600463-7G – 2022.09
9.1 About connecting the electrical wiring ..................................................................................................................................
9.1.1 Precautions when connecting the electrical wiring ..............................................................................................
9.1.2 Guidelines when connecting the electrical wiring ................................................................................................
9.1.3 Specifications of standard wiring components .....................................................................................................
9.2 To connect the electrical wiring to the outdoor unit ............................................................................................................
Before connecting the electrical wiring
Make sure the refrigerant piping is connected and checked.
Typical workflow
Connecting the electrical wiring typically consists of the following stages:
1 Making sure the power supply system complies with the electrical
specifications of the heat pump.
2 Connecting the electrical wiring to the outdoor unit.
3 Connecting the electrical wiring to the indoor unit.
4 Connecting the main power supply of the indoor unit.
5 Connecting the main power supply of the gas boiler.
6 Connecting the communication cable between the gas boiler and the indoor
unit.
7 Connecting the user interface.
8 Connecting the shut-off valves.
9 Connecting the domestic hot water pump.
10 Connecting the alarm output.
11 Connecting the space heating ON/OFF output.
12 Connecting the safety thermostat.
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF ELECTROCUTION
All electrical parts (including thermistors) are powered by the power supply. Do NOT
touch them with bare hands.
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10 minutes, and measure the voltage at
the terminals of main circuit capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you can touch electrical components.
For the location of the terminals, see the wiring diagram.
9 Electrical installation
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Installer reference guide
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