HREI
Inst Issue 1: 09.05.16
4.
Electrical Connection and Control Regulation
4.1 The power supply is single-phase 230V/50Hz with a protected
electrical cable (1). The section of the cable and its protection must be
sized according to the number of units on the line and its length.
The regulation box will be connected to the gas heaters by a pilot wire.
Connect the regulator to the first heater, then connect the first heater to
second and proceed in the same for the others until the last one.
For people and equipment safety, it is recommended to install a switch
isolator (2). The connection must be realized by a qualified installer
following the diagram above.
Refer to the technical manual given with the regulation.
WARNING
Be sure that general power supply is cut off before any
operation on the line. Electrocution hazard.
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