Hitachi MULTIZONE RAD-18QPE, Technical Catalogue

Page: 26 / 27

OPTION LIST
10-15
10.5 REMOTE SENSOR - SPX-RTH1
This remote sensor is applicable to Duct type indoor unit for Hitachi split system air conditioner.
10.5.1 SELECTION OF INSTALLATION POSITION
The thermistor for detecting room temperature is installed inside the remote sensor
The installation position of the remote sensor should be determined in consideration with the following conditions.
– Where the average room temperature can be detected.
– Where is not exposed to the sun
– Where the heat source is not located near the remote sensor.
– Where the discharge air from the air conditioner does not blow directly.
– Where is not affected by the outdoor air when opening / closing the door, etc
10.5.2 INSTALLATION PROCEDURE

In case of mounting onto the wall (Fig.1)
– Make the wiring on the sensor box, and let the wires for sensor through the box slot.
– Fix the sensor box onto the wall with 2 screws (B)
– In case that the sensor box can not be fixed onto the wall with screws, fix it onto the wall by using the double sided
adhesive tapes, etc.

In case of mounting onto Electrical Switch box (Fig. 2 and 3)
– Make the holes for fixing sensor box on the Switch Box Cover (A) (field-supplied) as shown on the Fig. 3 and fix the
sensor box to the plate with screws (B)
– Pay attention that the hole for air intake on the sensor box (C) may not be shut.
Fig. 1
Fig. 2 Fig. 3
10.5.3 WIRING PROCEDURES
– Remove the original room thermistor from CN1 at the indoor printed circuit board.
– Connect the cord (15m) of the remote sensor to CN1 (Black) of the indoor printed circuit board.
Please refer to the actual manual supplied with the SPX- RTH1 for more details.