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4
Installation - Direct units
4.1 FITTING THE IMMERSION HEATER(S)
The immersion heater(s) supplied should be screwed into the 1 3/4" BSP boss(es) on the side of the
MegaLife unit. Ensure the "o"-ring seal is in place and is not damaged. DO NOT use any other
type of seal or sealant on the threads.
The MegaLife heater will not accept standard 2 1/4" BSP threaded immersion heaters. This is to
prevent the use of immersion heaters which do not have a safety thermal cut-out fitted. The
immersion heater should only be replaced with authorised Heatrae Sadia spare parts.
The 170 litre and 210 litre direct models are supplied with two immersion heaters. If both immersion
heaters are not required a boss can be plugged with the aid of an 1 3/4" BSP blanking plug
available from Heatrae Sadia (order Heatrae Sadia part no. 95 605 829).
4.2 WIRING (see Diagram 3)
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 Diagram 3 and the instructions supplied
within the cap of the immersion heater(s).The immersion heater(s) MUST be earthed. The supply
cable must be routed through the cable grip provided and the outer sheath of the cable firmly secured
by tightening the screws on the cable grip. 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
It is recommended that the immersion heater thermostats are set to between position 4 and 5 (60
65
C), however they can be set between 1 and 5 (10
o
thermal cut-out that will switch off the immersion heater in the event of a thermostat failure. The
thermal cut-out reset button position is indicated on Diagram 3. DO NOT bypass the thermal cut-out
in any circumstances.
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
8 8
and 70
C). The thermostat incorporates a
o
o
-
o
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