Electrical Connection - Mitsubishi Electric Ecodan EHSC series Installation Manual

4
Installation

4.5 Electrical Connection

All electrical work should be carried out by a suitably qualified technician. Failure
to comply with this could lead to electrocution, fire, and death. It will also invali-
4.5.1
date product warranty. All wiring should be according to national wiring regula-
4.2.1 4.5.4
tions.
Breaker abbreviation Meaning
ECB Earth leakage circuit breaker for booster heater
TB Terminal block 
ECB
D
E
C
B
A
<1 phase>
<Figure 4.5.1>
Hydrobox NOTICE
1. When the hydrobox leaves the factory, the main controller cable (Fig. 4.5.2) on
the main unit is not connected to the controller's relay connector (Fig. 4.5.3) on
the front panel.
After completing installation and wiring in the field, connect the main controller
cable to the relay connector, then turn on the power.
2. Before setting up the system, insert the included SD memory card.
(For more details, refer to section 5.6.)
23
ECB
D
TB
E
C
B
A
<3 phase>
The hydrobox can be powered in two ways.
. Power cable is run from the outdoor unit to the hydrobox.
2. Hydrobox has independent power source.
Connections should be made to the terminals indicated in the figures to the left
below depending on the phase.
Booster heater and immersion heater should be connected independently from
one another to dedicated power supplies.
Locally supplied wiring should be inserted through the inlets situated on the
base of the hydrobox. (Refer to <Table 3.7-3.9>.
Wiring should be fed down the right hand side of the control and electrical
box and clamped in place using clips provided.
The wires should be inserted individually through the cable inlets as below.
Output wires
Signal input wires
Wireless receiver (option) wire
(PAR-WR51R-E)
to Power line and indoor-outdoor wire
Connect the outdoor unit – hydrobox connecting cable to TB.
Connect the power cable for the booster heater to ECB.
• Make sure that ECB is ON.
Main unit
<Figure 4.5.2>
Main unit
<Figure 4.5.4>
Relay
connector
Front panel (back view)
<Figure 4.5.3>