CombiSteel 7469.1100 Mode D'emploi page 7

XP - socket
* - for equipment operational at low ambient temperature;
** - optional (equipment for low-temperature cold rooms)
A refrigeration unit (monoblock unit) is fed from the power mains through a QMT automatic switch. To start the
operation of a monoblock unit it is necessary to switch on switch QG. In this case voltage is fed to the electronic
temperature governor (controller) that automatically adjusts the cooled down space temperature and controls
the defrosting process (refer to the Appendix).
The monoblock unit operational at a low ambient temperature has temperature regulator TRI that disconnects
it from the mains at temperature below minus 10OC. In this case the mains switch tube remains on, but the
controller indication disappears. At the ambient temperature of 5OC the RPM regulation system of the
condensor blowing fan (ТR2, К3, А2) and the heating of the compressor carter (ЕМС) and the controller (ЕС) are
switched on. The variator adjustment is specified in Appendix C.
IMPORTANT! The manufacturer reserves the right to insignificantly revise the circuit diagram without prior notice
provided that the operation is not deteriorated.
t
t
~ 1 ~
1
~ 1 ~
1
F 3
3 ~
~
1
1. On machines with the front type 1, there are MCV and MVE motors installed per 1.
2. PM pressure relays are only found on machines with the front type 2.
Fig.2. Circuit diagram of a cooling machine
Product line STANDARD (index SF).
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