Ecodan 150 Standard - Installation - Immersion Heater Electrical Supply

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INSTALLATION - IMMERSION HEATER ELECTRICAL SUPPLY
The pre-plumbed cylinder units are supplied tted with an immersion heater which can be used to supplement the Air Source
Heat Pump heating input. The immersion heater is located within the controls housing. Refer to Fig 21 below for details of wiring
of the immersion heater. The mains supply circuit to the immersion heater must be protected by a suitable fuse and
double pole isolating switch with a contact separation of at least 3mm in both poles. THE IMMERSION HEATER MUST
BE EARTHED.The supply cable for the immersion heater must be aminimum of 1.5mm
2
3 core HO5 VV-F sheathed.
DO NOT BYPASS THE THERMAL CUT-OUT IN ANY CIRCUMSTANCES
A
B
EARTH
CONNECTION
2/T1 4/T2 6/T3 A2
1/L1 3/L2 5/L3 A1
IHC
1
2 4
3
ECB
RED
BLUE
ORANGE
ORANGE
BLUEBROWN GREEN / YELLOW
THERMAL
CUT-OUT
IMMERSION
HEATER TERMINAL
HOUSING
GREEN / YELLOW
BLUE
BROWN
FTC5 CONTROLLER
IMMERSION HEATER
MAINS SUPPLY CABLE
1.5mm
2
3 CORE
HO5 VV-F CABLE
TO PLUG REFERENCE
CNIH ORN ON FTC-5
PCB
EARTH SCREW ON FTC-5
CONTROLLER BACKPLATE
Fig 21 - Immersion heater wiring