FCU Configuration variables

ref

Description

default

range

C1

SPFC

Occupied Setpoint

20

10.0 to 35.0C

C2

SPDB

Setpoint Deadband

1.0

0.0 to 10.0C

C3

SPTR

Setpoint Trim

0

-10.0 to 10.0 C

C4

SPTY

Setpoint Type, control mode
0 control to SPFC, occupation from Master Zone
1 SPFC supervised from Master Zone
2 Off Coil temperature control, Heat/Cool demands from Zone Controller or another Fan Coil

1

0 to 2

C5

INMD

Input Mode use of terminals 'temp'
0 supply temperature
1 window contact (short = occupied) AND internal occ
2 Time Clock OR internal clock
3 External occupation signal only
4 Alarm input
 

0

0 to 4

C6

MAXH

Maximum Supply Heating setpoint

30

0 to 90C

C7

MINH

Minimum Supply Heating setpoint

20

0 to 90C

C8

MAXC

Maximum Supply Cooling setpoint

18

2 to 30C

C9

MINC

Minimum Supply Heating setpoint

10

2 to 30C

C10

MIND

Supply minimum demand, used for switching between heating and cooling

4

0.0 to 10.0

C11

OCCO

When set controller will only run during the occupied period 

0

0 to 1

C12

HPRD

heating valve period or minimum on time

depends on driver type

1 to 60 secs/10

C13

HDLY

Interlock delay
negative value delays fan (or pump) after heating starts
positive value cause run on of fan after heating shuts down

0

-30.0 to 30.0 minutes

C14

CPRD

cooling valve period or minimum on time

depends on driver type

1 to 60 secs/10

C15

CDLY

Interlock delay
negative value delays fan (or pump) after cooling starts
positive value cause run on of fan after cooling shuts down

0

-30.0 to 30.0 minutes

C16

FPRD

Fan period, minimum time to change fan speed steps

12 (2 minutes)

1 to 60 secs/10

C17

FRPT

Frost protect
0 no action
1 open heating valve 50%
2 open heating valve and run pump/fan

0

0 to 2

C18

MANL

Manual level , from Doorway

0

-100 to 100 %

C19 

HTSC

Heat source

1

-1 to 100

C20

CLSC

Cool source

0

-1 to 100

C21

MXCT

Maximum CT setpoint

70

20 to100 C

C22

MNCT

Minimum CT setpoint

50

20 to 100 C

C23

ALRM

 alarm mode  
0 ignore alarms
1 report alarms
2 report alarms, shut down all outputs on alarm
3 report alarms, shut down all outputs on STOP alarm or sensor fail alarm

1

0 to 3

C24

ALST

not used 

0

0 to 1

C25

MXVA*

Maximum voltage channel A

10.0

0.0 to 10.0 volt

C26

MNVA*

Minimum voltage channel A

0.0

0.0 to 10.0 volt

C27

MXVB*

Maximum voltage channel B

10.0

0.0 to 10.0 volt

C28

MNVB*

Minimum voltage channel B

0.0

0.0 to 10.0 volt

ref

Description

default

range

C30

INPA

input A  occupation/window contact et al

0 to 1

C31

INPB

input B

0 to 1

C32

RLYA

relay A

0 to 1

C33

RLYB

relay B

0 to 1

C34

RLYC

relay C

0 to 1

C35

RLYD

relay D (fan A)

0 to 1

C36

RLYE

relay E (fan B)

0 to 1

C37

RLYF

relay F (fan C)

0 to 1

C38

AUTO

Automatic/manual mode

0 to 1

C39

OVRD

override

0 to 1

C45

CGST

configuration mode

ref

Description

default

range

C30

INPA

input A  occupation/window contact et al

0 to 1

C31

OCCD

occupied

0 to 1

C32

not used

0 to 1

C33

not used

0 to 1

C34

COOL

cooling mode

0 to 1

C35

RLYA

relay A

0 to 1

C36

RLYB

relay B

0 to 1

C37

RLYC

relay C

0 to 1

C38

AUTO

Automatic/manual mode

0 to 1

C39

OVRD

override

0 to 1

C45

CGST

configuration mode

ref

Description

default

range

C50

SPLA

supply air temperature

5.0 to 35.0 C 

C51

RTNA

return air temperature

5.0 to 35.0 C

C52

HCOP

heat cool output to drivers (cooling negative)

-100 to 100 %

C53

SPSL

supply (off coil) setpoint

5.0 to 35.0 C

C54

SPRT

return air setpoint

5.0 to 35.0 C

C55

HDMD

heat demand from return loop or from Zone Controller

0 to 100%

C56

CDMD

cool demand from return loop or from Zone Controller

0 to 100%

ref

Description

default

range

C60

SPOC

Occupied setpoint

20.0

5.0 to 35.0 C

C61

SPNO

Non Occupied setpoint

10.0

5.0 to 20.0 C

C62

SPSV

Supervised setpoint from Master controller

0 to 35.0 C

C63

SPTR

Setpoint Trim

0

-10.0 to 10.0 C 

ref

Description

default

range

C69

RTLP

selects Return Loop parameters

0

0 to 1

C70

UNDH

sets very Low muzzy level for heating loop

3.5 :1.00

10 to 200

C71

OVRH

sets very High muzzy level for heating loop

3.5 :1.00

10 to 200

C72

DBBH

deadband sets limit for OK band for heating loop

1.5 :0.50

10 to 100

C73

RCGH

max rate of change heating

5 to 100

C74

GN H

gain heating

20 :50

1 to 200

C75

UNDC

sets very Low muzzy level for cooling loop

3.5 :1.00

10 to 200

C76

OVRC

sets very High muzzy level for cooling loop

3.5 :1.00

10 to 200

C77

DBBC

deadband sets limit for OK band for cooling loop

1.5 :0.50

10 to 100

C78

RCGC

max rate of change cooling

5 to 100

C79

GN C

gain cooling

20 :50

1 to 200

ref

Description

default

range

C80

XCFG 

forces exit from config mode

C81

 GRP

own group number

ref

Description

default

range

C90

NOAL 

no alarm

C91

SENF

sensor fail

C92

EXTN

alarm for external input

C93

STOP

STOP alarm received

ref

Description

default

range

C100

#ACT

number of Actuators registered to this controller

ref

Description

default

range

C120

SLVE

denotes that this is a Slave Fan Coil

0

0 to 1

C121

MZON

zone number of master zone

0

0 to 200

ref

Description

default

range

C130

PN A

 config variable number for channel A 

51

0 to 255

C131

PT A

period code for plot A

1

1 to 4

C132

PN B

 config variable number for channel B 

52

0 to 255

C133

PT B

period code for plot B

1

1 to 4

C134

PN C

 config variable number for channel C 

53

0 to 255

C135

PT C

period code for plot C

1

1 to 4

ref

Description

default

range

C150

HTYP

heating driver type

0 to 5

C151 

HSTG

number of heating stages

0 to 8

C152

CTYP

cooling driver type

0 to 5

C153 

CSTG

number of cooling stages

0 to 8

C154

FTYP

fan driver type

0 to 7

C155 

FSTG

number of fan stages

0 to 5