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STANDARD MODE: Operation Logic
3
The PAW-SERVER-PKEA-1 can handle two Units of PKEA, TKEA or YKEA series, for Computer Room
installations.
Operation parameters are set by the Remote Controller for both units.
- Cascade Management:
PAW-SERVER-PKEA-1
One unit is Master and the other one is Slave (at first power supply unit "A" will be Master).
When ON state is set on the Remote Controller, only the Master unit starts.
Room temperature is detected by the Master unit.
Every 12 hours working interval, Slave becomes Master.
Slave unit will switch to ON in these cases:
o COOLING/DRY Mode: (Room Temperature – Set Temperature)
o HEATING Mode: (Set Temperature – Room Temperature)
Slave unit will switch OFF in these cases:
o COOLING/DRY Mode: Room Temperature = Set Temperature
o HEAT Mode: Room Temperature = Set Temperature
Note: For RESTART function input dry contacts I1 and I2 must have a jumper.
- Back-up:
If an alarm occurs on one unit, the other one becomes Master.
When the failure is over, the repaired unit will become Master.
- Server Room Overheating prevention:
If indoor temperature rises above 28 °C, both indoor unit alarms will be activated.
- Dip Switch functions:
Inside the PAW-SERVER-PKEA-1, removing the central cover, you find 4 dip-switches.
Dip-Switch n. 1 is for service only. It must be set to ON.
Dip-Switch n. 2 ON: enables "Energy Saving Mode".
If room temperature is between 8 °C and 18 °C, the units will be OFF (indoor temperature is
checked by the Master unit). This fuction can be enabled together with Third party BMS mode.
Dip-Switch n. 3 ON: enables "Third Party BMS Management: mode "A" (remote controller
DISABLED)".
SETTING PROCEDURE
1. Switch ON the unit and set up operation parameters (mode, set temperature, fan speed,
vane position)
2. Set to ON Dip Switch n. 3
From now on the PAW-SERVER-PKEA-1 stores the functioning parameters (mode, set
temperature, fan speed, vane position) and ignores the Remote Controller.
handles the units as follow described:
8
≥
2 °C
≥
5 °C
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