22
LIFT OFF
REPLACE
LIFT FROM THIS POINT
LUGS
Access to Control Unit:
Disconnect from mains supply before removing any covers.
Removing the Control Cover:
• Unscrew the large screw using a flat ended screw driver.
• Lift from bottom of cover at point indicated until cover comes
away freely
Replacing the Control Cover:
• Tilt and align the top 2 lugs in the holes indicated
• Firmly press the cover until it “snaps” back in place.
• Tighten the large screw ( DO NOT OVER TIGHTEN ).
INSTALLATION AND
COMMISSIONING INSTRUCTIONS (2)
DIRECT MODEL
Immersion Heater(s)
The MEGAFLO Eco is supplied with either one (D model), two (DD models), three (DDD models) or four (DDDD models) factory fitted immersion heaters.
Each immersion heater is rated 3kW at 240V~.
To remove the immersion heater:
Open the cover to the upper immersion heater. Unplug the thermostat from the element by gently pulling the thermostat outwards. Unscrew the
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 shafted screwdriver inserted into one of the thermostat pockets. Hand tighten the 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 backnut. Secure in position by tightening with the key spanner provided.
If an additional immersion heater is required, order part no. 95:970:554.
Wiring (see Figure 16, p.23)
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 Figure 15, p.23. The immersion heaters MUST be earthed. The supply cable should be
1.5mm² 3-core HOFR sheathed and must 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 operating, 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 Eco HAS BEEN FILLED WITH WATER.
Operation
See Figure 16, p.23 for details on how to adjust the temperature setting of the heater. The thermostat incorporates a 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 Figure 16, page 23.
DO NOT BYPASS THE THERMAL CUT-OUT IN ANY CIRCUMSTANCES.
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