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5
Installation - Direct units
5.1 IMMERSION HEATER(S)
The Megaflo Solar Direct is supplied with two factory fitted immersion heaters. Each immersion
heater is rated 3kW at 240V.
To remove the immersion heater:
Ensure the cylinder is drained of water first. Open the cover to the upper immersion heater.
Unplug the thermostat from the element by gently pulling the thermostat outwards. Unscrew the
brass backnut using the key spanner provided. Remove the immersion heater assembly and
sealing gasket from the boss.
Replacement:
Insert the immersion heater and sealing gasket into the required boss. Ensure that the sealing
gasket is not displaced when inserting. It may be helpful to support the immersion heater using
a round bladed screwdriver inserted into one of the thermostat pockets. Hand tighten the brass
backnut. Secure the immersion heater in position by tightening with the key spanner provided.
Insert the blanking plate into the remaining boss ensuring the sealing gasket is not displaced
when inserting. Hand tighten the brass backnut. Secure in position by tightening with the key
spanner provided.
If an additional immersion heater is required order Part No. 95 606 964.
5.2 WIRING (see Diagram 10)
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 10. The immersion heat-
ers MUST be earthed. The supply cable should be 1.5mm
be routed through the cable gland provided with the outer sheath of the cable firmly secured by
tightening the screw on the cable gland. Replace the immersion heater cover(s) before operat-
ing ensuring that the threaded edge clip is in position to provide a suitable thread for the cover
screw.
DO NOT OPERATE THE IMMERSION HEATER(S) UNTIL THE MEGAFLO SOLAR HAS
BEEN FILLED WITH WATER.
5.3 OPERATION
It is recommended that the immersion heater thermostats are set to between position 4 and 5
(60
o
porates a thermal cut-out that will switch off the immersion heater in the event of a thermostat
16
16
- 65
C), however they can be set between 1 and 5 (10
o
tech
3 core HOFR sheathed and must
2
and 70
o
C). The thermostat incor-
o
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