SEQUENCE OF OPERATION
Each zone damper is controlled by its own space thermostat and motorized zone damper. If any of the zone
thermostats call for heating or cooling, the zones not calling will have their dampers powered closed, and the
zones calling will have their dampers open. The heating or cooling equipment will be brought on at the same
time. When all zones are satisfied, the heating or cooling equipment turns off. Zone dampers then reposition
based on ventilation mode selection. The system can be set up to operate in either Cooling Priority or Majority
Wins mode.
COOLING PRIORITY MODE -
If any zones are calling for heating and a zone calls for cooling, the cooling will
receive priority and the system will operate in the cooling mode. When all cooling calls are satisfied, the system
will automatically changeover and take care of the heating calls.
MAJORITY WINS
MODE
- If more zones call for heating than cooling, the system will be in the heating mode. If
more zones call for cooling than heating, the system will be in the cooling mode. If the number of heating and
cooling calls are equal, cooling wins.
ZONE
THERMOSTAT
TERMINALS
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C
R
OB
G
Y2
Y1
W3/AUX
W2
W1
ZONE S
T
AT 1
C
R
OB
G
Y2
Y1
W3/AUX
W2
W1
ZONE S
T
AT 2
C
R
OB
G
Y2
Y1
W3/AUX
W2
W1
ZONE S
T
AT 3
C
R
OB
G
Y2
Y1
W3/AUX
W2
W1
ZONE S
T
AT 4
C
R
OB
G
Y2
Y1
W3/AUX
W2
W1
ZONE S
T
AT 5
C
R
OB
G
Y2
Y1
W3/AUX
W2
W1
ZONE S
T
AT 6
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SPEED
UP
MODE
PC BOARD
ZD1
ZD2
ZD3
ZD4
ZD5
ZD6
HIGH LIMIT
100
175
137
HIGH BP
55
62
70
LOW LIMIT
LOW BP
40
49
58
0
25
50
STAGE TIMER
5
12
20
R
C
PC D
C D
PO
PC D
C D
PO
PC D
C D
PO
PC D
C D
PO
PC D
C D
PO
PC D
C D
PO
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DAS
DAS
OTS
OTS
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O/B
G
Y2
Y1
W3/AUX/EH
W2
W1
RH
SPARE SYSTEM RH
SYSTEM RC
O/B
FAN
Y2
Y1
W3
AUX/EH
W2
W1
2 AMP
2 AMP
2 AMP
4 AMP
. . . . .
. . . . .
RC
HVAC SYSTEM
SENSORS
ZD
6
Z
D
5
Z
D
4
Z
D
3
Z
D
2
Z
D
1
2
4VAC
EXPANSION
CONNECTOR
Jackson Systems
Z-600
4 ZONES OFF
3 ZONES OFF
2 ZONES OFF
ON
OFF
STAGE TIMER
CAPACITY
CONTROL
CAP CTRL EMHT
DAS LIMIT PURGE TEST
OTS STATUS POWER
ZONE
OPEN
NOT USED
3 SEC = 1 MIN
DAS = DISCHARGE
AIR SENSOR
OTS = OUTDOOR
SENSOR
TIME DELAY
SPEED UP
MODE
(3 SECONDS = 1 MINUTE)
4 AMP
PC BOARD FUSE
24 VAC
TRANSFORMER
INPUT
ZONE DAMPER
TERMINALS
HIGH AND LOW
BALANCE POINT
ADJUSTMENT
HIGH AND LOW
LIMIT ADJUSTMENT
SENSOR
TERMINALS
HVAC
SYSTEM
TERMINALS
2 AMP
SYSTEM
FUSES
SYSTEM
STATUS
LEDs
EXPANSION
BOARD
CONNECTOR
SYSTEM
SETUP
SWITCHES
STAGE TIMER
ADJUSTMENT
(2 MINUTE OFF TIME)
ZONE
DAMPER
POSITION
LEDs
(ON WHEN
DAMPER IS
OPEN)
HVAC
EQUIPMENT
STATUS
LEDs
(ON WHEN
OUTPUT IS
ENERGIZED)
ON
OFF
HP
HC
SYSTEM
FOSSIL CONV
HEAT
PUMP
B
O
REV
VALVE
ELECT
GAS
FAN
ZONE
ALL FAN
MODE
1
MIN
OFF PURGE
20
MIN
OFF TIME
SHARE
MAJORITY COOL
PRIORITY
RH-RC
JUMPER
2 AMP 2 AMP
CENTER OF
FLAT SPOT
IS SETPOINT
POSITION
