UK Manufactured Unvented Hot Water Cylinder Installation Guide
39
Testing
Fitting The Immersion Heater
Always check the immersion for signs of leakage before wiring commences.
The immersion heater must be completely submerged in water with a minimum of 200mm of water above
the top of the immersion.
Do not operate the immersion heaters until the cylinder has
been filled with water
Wire the immersion through a double pole fused spur. The contact separation must be no less than 3mm
with a minimum breaking capacity of 16A or 20A.
Do not connect a 6,9 or 12kW
Immersion without using a relay
switch or contactor if 3 phase.
20 Amp Fused
2-pole Isolating Switch
20 Amp Fused
2-pole Isolating Switch
230V AC ~50Hz
230V AC ~50Hz
Standard Immersion
Smart Immersion
