Westric SW Series, Инструкция по установке, эксплуатации и обслуживанию

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
Light indicators when power on the following elements:
- V1: Unit 1 Evaporator Fan
- V2: Unit 2 Evaporator Fan
- R1: Unit 1 Electrical Heater
-
R2: Unit 2 Electrical Heater
-
C1: Unit 1 Compressor
-
C2: Unit 2 Compressor
-
NORMAL: Lit: No failure, Off: Failure.

System parameters
The following parameters can be displayed or programmed by the user very easily through the display and
keyboard of the sequencer.
- Ambient temperature
- Heating set point
- Cooling set point for head unit
- Cooling set point for backup unit
-
High temperature alarm set point
-
High temperature alarm delay
-
Unit cycle time
-
Access code

Emergency stop terminal block.
This terminal block can be used to interconnect the sequencer with various safety or protection devices such as

fire alarm control, phase monitoring relays, etc... When any these contacts are open, the air conditioning system
comes to a complete stop.
The
Westric SW-302 sequencer is delivered with a bridge in this terminal block, which must be removed if you
choose to connect it to any of the devices mentioned above.

Manual Thermostat Terminal Block (Not included in the sequencer and not required)
Westric SW-302 sequencers have a terminal block to which a mechanical room thermostat can be connected.
In the event of a possible microprocessor failure, this thermostat can be used to force both units to switch on in
order to keep the room cool.
The thermostat temperature set point must be at least one degree higher than the alarm value programmed in the
sequencer.
It should be noted that when this thermostat is actuated the timers do not, therefore it should be used for
emergency situations and only by authorized personnel.
For connection to the terminal block, the lower and upper cover of the sequencer must be removed.

Terminal block for unit stop.
It has two terminals one for each unit, these digital inputs are for the case that the unit has a failure digital output,
when it opens the sequencer instantly cycles to the backup unitt and stop the one that was working. The reset of
this failure is manual.