Installation - Direct Units - Heatrae Sadia Megalife 100E Installation Manual

4: Installation - Direct Units

4.1 Immersion Heater(s)
The Megalife is supplied with two factory fitted immersion heaters (120L - 210L) and one immersion heater on the
100L model. Each immersion heater is rated 3kW at 240V (2.8kW at 230V)
If both immersion heaters are not required a boss can be plugged with the aid of a blanking plug available from
Heatrae Sadia (order Heatrae Sadia part no. 95 605 881).
4.2 Wiring (see Fig. 03, below)
All electrical wiring should be carried out by a competent electrician and be in accordance with the latest I.E.E.
Wiring Regulations. Each circuit 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(s) should be wired in accordance with Fig. 03, below.
The immersion heater(s) MUST be earthed. The supply ( HOFR 1.5mm² min ) cable must be routed through the
cable gland provided and the outer sheath of the cable firmly secured by tightening the screw on the cable gland.
Replace the immersion heater cover(s) before operating.
DO NOT operate the immersion heater(s) until the Megalife has been filled with water.
4.3 Operation
Switch on the electrical supply to the immersion heater(s) and allow the unit to heat up. Check that the thermostat
operates correctly. A storage temperature of approx. 60ºC is recommended. If necessary the temperature can be
adjusted by inserting a flat bladed screwdriver in the adjustment spindle on top of the immersion heater thermostat
and rotating (see Fig. 04, page 9). The full adjustment represents a temperature range of between 10ºC and 72ºC.
4.4 Safety
DO NOT BYPASS THE THERMAL CUT-OUT(S) IN ANY CIRCUMSTANCES.
DISCONNECT FROM THE MAINS SUPPLY BEFORE REMOVING ANY COVERS.
NEVER ATTEMPT TO REPLACE AN IMMERSION HEATER OTHER THAN WITH THE RECOMMENDED HEATRAE
SADIA MEGALIFE SPARE PART. ( see page 14)
Fig. 03: Electrical connection (direct schematic)
N L
1.5mm2 3 Core
HOFR sheathed
cable
7