Fisher PCG-06, Installation, Operation And Service Manual, Page: 50 / 66

HYDRONIC CASSETTE 50
CONTROL SPECIFICATIONS
HOT AND CHILLED WATER CASSETTE
WITH MASTER-SLAVE CONTROL
1. ABBREVIATIONS AND DEFINITION OF INPUT & OUTPUT PORTS
Ts = Setting temperature
Tr = Room air temperature
Ti1 = Indoor coil temperature, ID1
Ti2 = Indoor coil temperature, ID2
MTV1 = Cool Motorized valve
MTV2 = Heat Motorized valve
AUX1 = Hot water free contact
AUX2 = Cold water free contact
I/O
Code
2-Pipe 4-Pipe
Room Sensor CN8 Return air Return air
Chilled water Sensor CN7 Indoor coil Chilled water coil
Analogue Input
Hot water Sensor CN6 Reserved Hot water coil
IR receiver CN9 Used Used
Input
Wired wall pad CN5 Used Used
Occupancy contact PR-O
DIP-SWITCH IS ON. (Window contact)
The contact is normally open. If the contact has
been closed for 10 minutes, the unit will go to stand-
by mode (all output signals will be disabled). When
the contact is open again, the unit will resume
running normally.
DIP-SWITCH IS OFF. (Economy contact)
Cooling operation will only be activated when Tr - Ts
>= 4 ºC. If Tr < Ts, cool operation will be terminated.
Heating operation will only be activated when Tr –
Ts <= -4 ºC. If Tr > Ts, heating operation will be
terminated.
Float switch Float Voltage-free (NC)
Digital input
Electrical heater safety
switch
EH
Voltage-free (NC). The contact is closed before the
EH is turned on.
Phase L
Power supply to the PCB and all the loads
connected to the voltage outputs. Max length: 5 m.
Neutral N
Power supply to the PCB and all the loads
connected to the voltage outputs. Max length: 5 m.
Power input
Earth GND
Power supply to the PCB and all the loads
connected to the voltage outputs. Max length: 5 m.