11
UAB KOMFOVENT reserves the right to make changes without prior notice
ZC-19-02
3.2. Zone module configuration for modulating type direct expansion (DX) units
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
Zone module can control DX units, where unit capacity is regulated by 0..10 V signal. Depending on the DX unit model, if
needed, additional digital outputs are available for switching heating/cooling modes and start signal. Capacity regulation
can be controlled in three ways:
•
Universal
– capacity is regulated according to P.I. law, using 0..10 V signal. Higher voltage signal demands higher capacity
from the DX unit.
•
Temperature setpoint*
– capacity is regulated by requesting exact temperature setpoint from the DX unit air
temperature sensor. Analog control signal of 2,2..10 V is provided, which corresponds to 11..50°C temperature setpoint
for the DX unit.
•
Daikin
– special regulation for DX units with 0..5..10 V capacity regulation, used in some of Daikin DX models. Depending
on the signal, DX unit can decrease capacity (signal between 0..5V), increase capacity (signal between 5..10V), or maintain
actual capacity (signal 5V).
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