Temperature And Humidity Sensor - Trane MERCURY EDAB 1105A Technical Manual

Replacing the electrical heaters
WARNING! Before replacing the electrical heaters, disconnect the power supply from the unit. Make sure
that it is not possible for the power to be turned on again while they are being replaced.
WARNING! The heaters must only be replaced by a qualified electrician.
The total power of the electrical heaters is divided into dif-
ferent elements, each of 3 kW.
The colour of the wires on each element has the following
meaning:
- BLACK wire = low power absorption (1 kW);
- WHITE wire = high power absorption (2 kW);
- RED wire = standard.
The wires of each element are connected to the CR1 and
CR2 connectors on the electrical panel in such a way as to
balance the load across the phases and create three stages
of heating (refer to the electric diagram on the side of the
machine).

Temperature and humidity sensor

The diagram shows an optional temperature and humidity sensor. When replacing the sensor, release the white plastic
lid by pressing on point (A) with a screwdriver or a pointed tool; lifting the lid (B) to gain access to the fixing screws (C)
and the terminals (D).
A screened cable is used for the electrical connections to the sensor; the connections to the terminals are shown on the
electrical diagram.
C
D
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C
PKG-SVX19B-E4