Thermalec ZENITH ZHR 96, Instruction Manual

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Zenith Range Instruction Manual
Page 13
Electrical installation (cont’d...)
Standard Power Supply: 400V/3ph/50Hz
Model Ref. Load kW Current Amps
Per phase
Elements
(no. x nominal kW)
ZHR 96 68 kW 140 12 x 8 kW
ZHR120 120 kW 174 15 x 8 kW
ZHR144 144 kW 206 18 x 8 kW
ZHR168 168 kW 244 21 x 8 kW
The size and specification of the cable to the heater should be decided by consulting the
electrical regulations applicable in the country of installation.
To minimise the effects of voltage drop, the plant room should be located as close as
possible to the main electrical supply.
The supply cable enters the heater via the removable plate at the back of the heater. The
plate should be drilled out to suit the size of cable gland used.
Under no circumstances should cable be installed through the metal plate without the
use of a gland
.
To access the terminals, remove the heater cover and terminal cover. The wires of the
incoming power supply (L1, L2, L3, N and E) must be connected to the appropriate
terminals.
It is vital that all wires are firmly terminated into each terminal. A 6mm spanner should
be used to ensure that the clamps are pulled firmly down onto the incoming cable ends.
Make sure that the cable is of sufficient diameter to ensure a good clamp is made and if
required, wind a length of copper strand around the other strands to increase the
diameter. After termination, check all the cables for tightness and replace both sets of
covers.
The heater will not operate without a pump interlock supply that switches 230V ON when
the filter pump is running. The live of this supply should be connected to terminal A and
the neutral to terminal B of the heater. The supply must be taken from the last device
switching the filter pump, to ensure that the heater will switch off at the same time as
the filter pump.
This pump interlock supply can also be used to control the operation of the heater
further. A time switch can (for example) be fitted to interrupt the supply to terminal A,
ensuring that it can only come on during specific periods of cheap electricity. This is
detailed on drawing APH 1319, together with arrangements for an override switch
allowing the filter pump to be run continuously.
Thermalec also produce a range of Pool Control Panels, which enable pumps, heating and
all other pool items to be controlled from a single control box. All panels are made to
order, to match the specific equipment. Please contact the Sales office for more details.