OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
13 (32)
MEASUREMENT AND ALARM DEVICES
The safety and regulation functions of the unit are performed by the microprocessor control. The unit is equipped
with the following temperature, humidity and pressure sensors, as shown in the figure below:
RVC/e. Modulates condenser fan speed to control condensation pressure (optional).
TSR. Electric heating element safety thermostat with re-set button under the coil;
SM.
Delivery air temperature sensor;
SE.
External air temperature sensor;
ST-STU. Room temperature (or optional temperature and humidity) sensor. The ST sensor is installed in the unit as
shown in the diagram; the STU sensor is supplied with a 3 metre cable and must be installed in the room.
FS.
Air flow sensor (differential pressostat) to detect low airflow and fan function.
PFS. Dirty filter sensor (differential pressostat).
AP-BP. Fixed setting high / low pressure switches (HP with manual re-set).
SPC. Condensation pressure sensor.
.
STU
SE
FS
PFS
BP
AP
SPC
TSR
RVC/e
BACK OF UNIT
SM
ST
Fig. 5.a.
MODELS WM* 0121-0181-0251-0281-0331
