ELECTRICAL CONNECTION
The Installation should be carried out by a suitably qualified person in accordance with BS 7671
(IEE) wiring regulations.
A double pole isolation switch having a contact separation of greater than 3mm should be fitted
to allow for servicing.
IMPORTANT:
The unit MUST be full of water before switching on the electricity supply.
The HYCO Apollo water heaters are all fitted with a 3kW heating element. The heating element
is located at the base of the unit. The heating element incorporates dual thermostats that are
linked to act as a control thermostat with an over-temperature safety cut-out. The thermostats
are factory set to 50
o
C for the control thermostat and 70
o
C for the cut-out thermostat.
The control thermostat should NOT exceed 60
o
C and the 20
o
C differential between the control
and cut-out thermostat MUST be maintained.
The supply cable should be securely clamped before replacing the heating unit’s own cover AND
as it passes through the gland in the element housing cover.
If during normal service, the cut-out thermostat operates first establish the reason for
operation. Possibly a wrongly set control thermostat. Switch off the electricity supply before
removing the element housing cover. Correct the problem and then press the button to reset
the cut-out thermostat. Replace the heating unit cover and the element housing cover before
switching on the electricity supply.
SCHEMATIC WIRING DIAGRAM
OPERATION
The cold water supply to the integral cistern is controlled by the ball valve. when one or more
hot taps are opened the hot water drawn from the unit is replaced from the contents of the cold
water cistern that is refilled automatically.
COMMISSIONING
Before making the electrical connection it is recommended that the unit is filled and checked
for leaks. Apart from the plumbing connections, the element or drain may have been loosened
in transit and require tightening,
SAFETY WARNING
The unit MUST NOT be used if it is suspected of being frozen. If water caeses to flow switch off
electricity supply immediatley at the isolating switch. If the unit is to be serviced or drained
disconnect the electricity supply before commencing the operation.
