Internal Wiring - Mitsubishi Electric Ecodan Installation Manual

Internal Wiring

Prerequisites:

A qualified part P certified Electrician is required to install the power supply

Nominal current draw ~ 10.3A heating, Maximum current draw ~ 23A

Care should be taken to ensure the power supply is weather proof

Supply cable should be either armoured cable, or twin + earth protected in conduit

Power should be isolated locally within 1.5 metres, minimum 3mm contact gap in isolator

An RCD (residual current device) should fitted in the supply to the Ecodan this should have a
tolerance of 30mA or more
The Honeywell S-Plan system will have to be wired to the Honeywell wiring centre as per the
instructions included.
This will include:

Hot Water Zone Valve

Heating Zone Valve

Heating Thermostat

Hot Water Thermostat

Circulating Pump

5 Amp fuse spur supply

Timer
The Honeywell wiring center will need a 5 core 1mm² cable run to the intended position of the
Mitsubishi Flow Temperature Controller (FTC).
Where more than one Heat pump is installed we will commission a bespoke controls system called a
step controller, this box will be located near to the hot water cylinder and is approximately the same
size as a consumer unit.
Hot water pasteurisation
In order to reach a temperature of 65 degrees to pasteurise the hot water to reduce the risks of
legionella, we recommend that the immersion heater is wired to a seven day timer and set to come on
once every seven days for approx 1hr to achieve this temperature.
EcoDan Installation Manual Version 1.0 (26/01/09) Ice Energy Heat Pumps Ltd © 2008
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