MEGAFLO Commercial 1000, Product Manual

Page: 23 / 40

Unvented Hot Water Cylinder
23
INST
ALLA
TION AND
COMMISSIONING (2)
Auxillary
Immersion Heater(s)
The Megaflo
Commercial
can be fitted with a selection of single phase and three phase immersion
heaters (see Table 12 and element allocation table, page 11 for details). The immersion heaters
must be installed in accordance with the installation instructions supplied with the immersion heater
(supplied separately)
Warning: Before starting any work on the Megaflo commercial immersion heaters switch off
all electrical supplies to such immersion heaters including thermostatic controls, these may
be on a separate circuit.
To remove the immersion heater:
Drain down the cylinder before any work is carried out on the Immersion heaters. Remove the
immersion heater cover and disconnect all wiring from the immersion and thermostatic controls.
Remove the 8 nuts (or bolts) and withdraw the immersion heater from the cylinder. Take care when
lifting the immersion out of the cylinder and work within safe working practices.
Replacement:
Make sure the Immersion heater gasket face is clean and if necessary replace the gasket (spare
part number 95607396). Replace the Immersion heater and make sure the 8 nuts (or bolts) are
correctly torqued (20Nm or 14.75 ft/lb) as per the Commercial Immersion heater fitting instructions
(36006161). Wire up the immersion heater as per Fig 5, page 13 or Fig 6, page 13 or Megaflo
Commercial immersion heater fitting instructions. Refill the cylinder and check for leaks. Turn on
the supply and set the thermostat temperature to the desired water temperature (60°C - 65°C is
recommended).
NOTE: The gasket should be pre-soaked in ambient temperature water for 30 mins before
installation and the 8 securing nuts are diametrically tightened to 20 Nm or 0.42psi
Wiring (See Figures 4, 5 & 6)
All electrical wiring should be carried out by a competent electrician and be in accordance with the
latest I.E.E. Wiring Regulations BS 7671.
DO NOT OPERATE THE IMMERSION HEATER(S) UNTIL THE Megaflo Commercial HAS BEEN FILLED
WITH WATER.
Operation
See Fig 4, page 13 for details on how to adjust the temperature setting of the heater.
DO NOT BYPASS THE THERMAL CUT-OUT IN ANY CIRCUMSTANCES
.