Optional or installed by others.
Customer Notes:
1. Factory installed.
(Reverse-Acting)
Remote Mounted
One Pipe Inset
(Reverse-Acting)
Remote Mounted
Tee
T-Stat Pressure (PSI)
T-Stat Pressure (kPa)
3
100
Position %
Air Valve
20.7
Stages of Heat
14
89
10 12
1st
96.5
2nd
Fan On
55.2
6
2.1
69
82.7
100
3rd
Restricted Leg
(137.9)
20
S
T-Stat
Actuator
Tee
Terminal Box
Electric Heater
Fan P.E.
Tee
(N.O.)
Switch
(62.06 kPa)
9 PSI
Restrictor
One Pipe
Two Pipe
T-Stat
(
103.4)
15
(137.9
)
2
0
S
T-Stat Pressure (kPa)
T-Stat Pressure (PSI)
100
Position %
Air Valve
3
20.7
Restrictor
Customer Notes:
100
89
Fan On
1.
Switch
(N.O.)
(62.06 kPa)
9PSI
55.2
62.1
Fan
P.E.
20
OnePipeInset
Factory installed.
Optional or installed by others.
One Pipe
T-Stat
Remote Mounted
(Reverse-Acting)
Restricted Leg
S
(137.9)
Tee
Actuator
1
5
(103.4)
Tee
(
1
37
.9
)
Two Pipe
Remote Mounted
(Reverse-Acting)
T-Stat
20
S
Position %
Position %
PN00 – VPCF, LPCF Parallel Fan-Powered Without Reheat
(Normal Operation: Cooling Only)
Normally-Open Damper and Actuator (Reverse-Acting Thermostat)
With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens to
increase primary cooling airflow to the space. With a decrease in room temperature, the opposite action occurs
until the damper is fully closed. Upon a continued decrease in zone temperature below setpoint, the parallel fan
is energized.
PN00 – VPEF, LPEF Parallel Fan-Powered with Electric Heat
(Normal Operation: Cooling Only)
Normally-Open Damper and Actuator (Reverse-Acting Thermostat)
With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens to increase
primary cooling airflow to the space. With a decrease in room temperature, the opposite action occurs until the damper
is fully closed. Upon a continued decrease in zone temperature below setpoint, the parallel fan is energized. If zone
temperature continues to decrease after the fan has been energized, heating stages are energized at the appropriate
pressure settings.
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