12
UAB KOMFOVENT reserves the right to make changes without prior notice
ZC-19-02
SW1
Zone 1
Zone 2
ON
ON
1 2
1 2
Water heater/cooler
ON
1 2 3 4 5 6 7
Heating
ON
1 2 3 4 5 6 7
Cooling
ON
1 2 3 4 5 6 7
Cooling
ON
1 2 3 4 5 6 7
Combi-coil
(heating/cooling)
ON
1 2 3 4 5 6 7
Heating
ON
1 2 3 4 5 6 7
Cooling
ON
1 2 3 4 5 6 7
Cooling
ON
1 2 3 4 5 6 7
Combi-coil
(heating/cooling)
SW2
W
ithout fr
ost pr
ot
ec
tion
W
ith fr
ost pr
ot
ec
tion
Modulating DX
ON
1 2 3 4 5 6 7
Universal
(0..10 V)
ON
1 2 3 4 5 6 7
Temperature setpoint
(11..50°C)
ON
1 2 3 4 5 6 7
Daikin
(0..5..10 V)
SW2
On/Off DX with reverse
ON
1 2 3 4 5 6 7
1 step
ON
1 2 3 4 5 6 7
2 step
ON
1 2 3 4 5 6 7
3 step
ON
1 2 3 4 5 6 7
4 step
ON
1 2 3 4 5 6 7
1 step
ON
1 2 3 4 5 6 7
2 step
ON
1 2 3 4 5 6 7
3 step
ON
1 2 3 4 5 6 7
4 step
SW2
Sequenc
e
Binar
y
On/Off DX without reverse
ON
1 2 3 4 5 6 7
1 step
ON
1 2 3 4 5 6 7
2 step
ON
1 2 3 4 5 6 7
3 step
ON
1 2 3 4 5 6 7
4 step
ON
1 2 3 4 5 6 7
1 step
ON
1 2 3 4 5 6 7
2 step
ON
1 2 3 4 5 6 7
3 step
ON
1 2 3 4 5 6 7
4 step
SW2
Sequenc
e
Binar
y
3.3. Zone module configuration for ON/OFF type direct expansion (DX) units
Zone module can control DX units, which do not have capacity regulation and needs only On/Off signal. Such type of units
also can be reversible, meaning that DX unit can operate in both modes: cooling and heating. If DX unit is not reversible, by
default it will be operating only in cooling mode. Up to four separate DX units can be connected in steps and controlled in
two different ways:
•
Sequence
– when all DX units are starting one after another if air temperature is not reached after previous step. This
type is recommended when capacities of DX units are equal. Example of sequence control: Step1= DX1, Step2=DX1+DX2,
Step3=DX1+DX2+DX3.
•
Binary
– when all DX units are starting according binary code and in such a way more steps can be achieved. This
type is recommended when capacities of DX units are different and, in ideal case, the capacity of each of the following
DX unit is double the previous. Example of binary control: Step1= DX1, Step2= DX2, Step3=DX1+DX2, Step4=DX3,
Step5=DX3+DX1, Step6=DX3+DX2, Step7=DX3+DX2+DX1.
Electrical wiring of external components:
1
GND
+24V
0..10V
GND
GND
GND
A
B
+24V
+24V
0..10V
0..10V
Output Output Input
Modbus
2 3 4 5 6 7 8 9 10 11 12
25 26 27 28 29 30 31 32 33 34 35 36
Output
Output
NO5
C
NO2
NO3
NO4
NO1
13 14 15 16 17 18 19 20 21 22 23 24
Input Input Input Input Input Input
N
TC
N
TC
NO
C
NO
C
NO
C
NO
C
ZONE MODULE (PM BOARD)
Hot w
at
er/C
ombi-
coil
mixing v
alv
e
D
X unit capacit
y
regula
tion
Cold w
at
er mixing
valv
e
Cold w
at
er mixing
valv
e (optional)
Cold w
at
er mixing
valv
e (optional)
Communica
tion
with AHU
Water
circulation
pump
Common
Hea
ting/C
ombi
Cooling
Supply air
temper
atur
e sensor
Retur
n w
at
er
temper
atur
e sensor
Water heater/cooler
Fr
ost pr
ot
ec
tion ther
mosta
t
Open=OK
, Close=A
lar
m
Combi-
coil r
ev
erse
Open=Hea
ting
, Close=C
ooling
1
GND
+24V
0..10V
GND
GND
GND
A
B
+24V
+24V
0..10V
0..10V
Output Output Input
Modbus
2 3 4 5 6 7 8 9 10 11 12
25 26 27 28 29 30 31 32 33 34 35 36
Output
Output
NO5
C
NO2
NO3
NO4
NO1
13 14 15 16 17 18 19 20 21 22 23 24
Input Input Input Input Input Input
N
TC
N
TC
NO
C
NO
C
NO
C
NO
C
ZONE MODULE (PM BOARD)
Communica
tion
with AHU
DX unit control
Common
DX
1
DX
2
DX
3
DX
4
Rev
erse (
Close = Hea
ting)
Supply air
temper
atur
e sensor
On/Off type DX unit
D
X unit failur
e
Open=OK
, Close=A
lar
m
1
GND
+24V
0..10V
GND
GND
GND
A
B
+24V
+24V
0..10V
0..10V
Output Output Input
Modbus
2 3 4 5 6 7 8 9 10 11 12
25 26 27 28 29 30 31 32 33 34 35 36
Output
Output
NO5
C
NO2
NO3
NO4
NO1
13 14 15 16 17 18 19 20 21 22 23 24
Input Input Input Input Input Input
N
TC
N
TC
NO
C
NO
C
NO
C
NO
C
PM BOARD
Communica
tion
with AHU
Supply air
temper
atur
e sensor
1
GND
+24V
0..10V
GND
GND
GND
A
B
+24V
+24V
0..10V
0..10V
Output Output Input
Modbus
2 3 4 5 6 7 8 9 10 11 12
25 26 27 28 29 30 31 32 33 34 35 36
Output
Output
NO5
C
NO2
NO3
NO4
NO1
13 14 15 16 17 18 19 20 21 22 23 24
Input Input Input Input Input Input
N
TC
N
TC
NO
C
NO
C
NO
C
NO
C
ZONE MODULE (PM BOARD)
Communica
tion
with AHU
DX unit control
Common
Oper
ation
Cooling
Hea
ting
Supply air
temper
atur
e sensor
Modulating type DX unit
Electrical heater
D
X unit failur
e
Open=OK
, Close=A
lar
m