As an alternative to using two flex cables, one 4-core cable may be used for the mains wiring.
Two heaters can be controlled by using the multi-function relay. The heaters need not be in the same cylinder. Heater no. 1 has
priority.
10
CONSUMER UNIT
With 16A MCB
IMMERSION HEATER
Max. Load 3kW
Alternative Mains Wiring
ISOLATOR
Must be double-pole
4-Core
16A
E
N
RELAY
MAINS
NO
C
NC
E
E
N
L
N
LH
IMMERSION HEATERS
Max. Load 3kW each
(Other loads can be used)
CLAMP
Install onto incoming mains
Live or Neutral cable to building
Two Heaters
1
2
ISOLATORS
Must be double-pole
240V AC MAINS SUPPLY
From 16A MCB or
13A fused outlet
COMMS LINK
For linking several
ImmerSUN devices
5V GD
A
B
CT CT
COMMS
RELAY
MAINS
NO
C
NC
E
E
N
L
N LH
CLAMP
PWR
