Heatrae Sadia Megaflo Eco SolaReady, Instructions Manual

Page: 17 / 52

INST
ALLA
TION
17
Direct Model
Immersion Heater(s)
The Megaflo Eco SolaReady Direct is supplied with two factory fitted immersion heaters, each rated 3kW at 240V. See fig 2
page 7 for positions.
Wiring (See Figure 16)
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 14 below. The immersion heaters
MUST be earthed. The supply cable should be a minimum of 1.5mm² 3 core HOFR sheathed.
DO NOT OPERATE THE IMMERSION HEATER(S) UNTIL THE MEGAFLO ECO SOLAREADY HAS BEEN FILLED WITH WATER.
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
(see Fig 12).
Operation
See Figure 13 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 13. DO NOT BYPASS THE THERMAL CUT-OUT IN ANY CIRCUMSTANCES.
The lower immersion heater can be operated via the solar differential controller (refer to fig. 16, "Block wiring diagram C")
for wiring details. See the Commissioning Section for setup details.
Note: The solar differential controller is rated at 3 amp and cannot directly switch the immersion heater. This must be done via
the Auxiliary Immersion Relay provided. The upper immersion is for boost purposes
only and should be manually switched via a separate 13 amp circuit.
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 ).
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 MEGAFLo ECO SOLAR SPARE PART
THERMAL CUT-OUT RESET BUTTON
SPINDLE POSITIONS
= MINIMUM TEMP
= MAXIMUM TEMP
= APPROX 60 °C
ROTATE SPINDLE CLOCKWISE
FOR TEMPERATURE INCREASE
AND COUNTER CLOCKWISE
FOR TEMPERATURE DECREASE
TEMPERATURE ADJUSTING
SPINDLE
LIFT OFF
REPLACE
LIFT FROM
THIS POINT
LUGS
N L
Direct Wiring Layout
1.5mm² 3 Core
HO5 VV-F
sheathed cable
Figure 12
Figure 14
Figure 13