EPSILON-CF IOM.pdf - Industrial Air

6.18.4 Circulating pump electrical connections
The external interlocks of unit must close for the unit to operate. The normally open external water circulating
pump contactor terminals must be wired in series with terminals on the unit control panel, to ensure that the
chiller can only start after the pump is in operation.
In ST units external enabling contacts must be jumpered (unless they are required for system functions).
See electrical drawing.
6.18.5 Electric connection of the thermostat (optional)
Connect the thermostat (supplied as option) with the electric panel of the indoor unit to the corresponding
numbered terminals of the terminal boxes, as indicated in the electric diagram on board of unit.
The section of the connection cables must not be less than 1.5 mm2.
The thermostat must be installed properly in the conditioned room at about 1,5 m from the floor, in a position to
measure the room temperature. The thermostat must therefore not be positioned in proximity of windows or
doors, direct solar radiation and sources which could disturb the measure of the temperature.
6.19 MICROPROCESSOR CONTROLLER
Turn on the pump before the unit starts and stop it after the unit has
stopped (recommended time delay: 60 sec.).
For detailed information on the operation of this system, refer to the specific controller manual supplied with
the unit.
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