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EIOM v2018.04
6.2 WATER COOLER
The water cooler designed for cooling air with fluid as the cold carrier and mounted in the unit.
Water cooler sections can be supplied with cold carrier temperature control point RMG. In case of built-in automation, connection of the water
circulator pump and the three-way valve with actuator is designed.
For water circulation pump and valve actuator information refer to section 6.1 “Water heater”.
Water cooler temperature sensor
is installed on the return pipe of the water. For mounting temperature sensor on the pipe - clip (hose clamp)
is used.
Figure 6.2.1 – Installation of the temperature sensor
6.3 ELECTRICAL HEATER
The electrical heaters designed for heating air by converting electrical energy to heat and mounted in the unit.
Connection:
• Electrical connection may only be undertaken by technically trained personnel.
• Before making the connections, compare the supply power technical specifications with the electric heater technical specifications (e.g. voltage,
frequency).
• Electric heater technical specifications and connection diagram attached on the inner side of the heater cover.
• Electric heater must be grounded. Ground terminal or screw is designed for the heater and labeled with “PE” or symbol .
• Construction of power supply should be made so that voltage is supplied firstly to the fan and then to the electrical heater (to prevent overheating).
• Construction of power disconnecting should be so that voltage is disabled firstly from the electrical heater and then from the fan (to prevent
overheating).
For electric heater power supply cable selection refer to section 4 “Three phase receiver power supply cable selection”.
Figure 6.3.1 - Electric heater section.
1 – Panel blocks, 2 – removable panel, 3 – electrical heater cover, 4 – reset button (-s), 5 – electrical heater.
Two-stage overheat protection:
Overheat protection used to protect heater from overheating if airflow is too slow or system has a breakdown.
First stage (automatic) overheat protection activates at 50°C and reverses automatically when it cools down.
Second stage (manual) overheat protection activates at 100°C, it should be resettled manually by pressing “RESET” switch (-s).
If overheat protection activates:
• Disconnect heater from the mains supply.
• Analyse and eliminate reasons of activation overheat protections thoroughly.
• When failures are eliminated, restore manual overheat protection, i.e. push “RESET” switch (-s). For this purpose release panel blocks 1 and
take off panel 2.
• Check if the heater works properly (no overheating).
General:
After starting the device, inspect if:
