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Immersion Heater(s)
The Remeha Flexistor can be tted with a selection of single phase and three phase immersion
heaters (see Table 7, page 9 and element allocation Table 9, page 10 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 Remeha commercial immersion heaters switch o󰀨 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 tting instructions
(36006161). Wire up the immersion heater as per Fig 5 or Fig 6, page 11 or Remeha Flexistor
immersion heater tting instructions. Rell 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: If using bre gaskets they 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. White silicone gaskets can be tted directly.
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 Remeha Flexistor HAS BEEN
FILLED WITH WATER.
Operation
See Fig 4, page 10 for details on how to adjust the temperature setting of the heater.
DO NOT BYPASS THE THERMAL CUT-OUT IN ANY CIRCUMSTANCES.
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