5
The outlet fitting is located on the underside of the heater and is threaded
3/4.BSP Female on the FBM25, 50 and 75, and 1”BSP Female on the
FBM125.
A Drain fitting is provided and is located on the element plate assembly under
the terminal cover. Ensure the electrical supply is disconnected before
removing the terminal cover and draining the heater.
To fill the heater the cold water supply should be turned on and a hot outlet
supplied by the heater opened. When water flows from the outlet, turn off and
allow cistern tank to fill. Adjust the float such that the Float Valve closes
when the water level in the cistern corresponds with the marked water level
line. After adjustment replace the cistern cover and secure using the cover
screw(s) provided.
ELECTRICAL CONNECTION
WARNING This appliance must be earthed. Installation must conform
with current IEE Wiring Regulations. It should be connected to a 230/
240V a.c. electrical supply via a double pole isolating switch with a
minimum 3mm contact separation in both poles. The supply cable
must have a minimum cross sectional area of 1.5mm
2
for each
element. NOTE 6kW units have two elements.
ELEMENT
3kW AT 240V
L
N
EARTH POST
THERMOSTAT
THERMAL
CUTOUT
230/240V ac SUPPLY
VIA DOUBLE POLE
ISOLATING SWITCH
Fig 2. Schematic Wiring Diagram 3kW units
