
128 VAV-PRC011M-EN
Pneumatic Controls
One Pipe
Restricted Leg
(Reverse Acting)
Remote Mounted
One Pipe Inset
Factory installed.
Optional or installed by others.
T-Stat Branch Pressure (PSI)
T-Stat Branch Pressure (kPa)
100
Constant
Volume
% Flow (CFM)
Constant Volume
3
8
10
Air Valve
20.7
55.2
69
% Flow (LPS)
13
15
1st
2nd
Stages of Heat
3rd
89.6
103.4
100
Customer Notes:
1.
Tee
20
(137.9)
S
20
(137.9)
S
M
Volume
Regulator
(103.4)
Electric Heater
T
Terminal Box
Restrictor
Remote Mounted
(Reverse Acting)
(137.9)
15
20
Two Pipe
T-Stat
S
T-Stat
Two Pipe
Remote Mounted
(Direct Acting)
T-Stat
(Direct Acting)
Remote Mounted
Restricted Leg
One Pipe Inset
Factory installed.
Optional or installed by others.
T-Stat Branch Pressure (kPa)
Constant Volume
Air Flow
T-Stat Branch Pressure (PSI)
Constant
Volume
3
8
100
% Flow (CFM)
Water Valve
20.7
55.2
15
10 13
103.4
69
89.6
100
% Flow (LPS)
Customer Notes:
1.
20
(137.9)
S
20
(137.9)
S
M
Volume
Regulator
(20.69 - 55.16 kPa)
3-8 PSI
T
(N.O.)
Restrictor
Tee
Valve
Water
(103.4)
15
(137.9)
20
S
One Pipe
T-Stat
The unit shall operate to a constant volume flow regardless of changes in space temperature. The volume regulator receives the inputs from
high- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changing duct pressure to maintain
constant volume flow. When reheat is applied, heating stages are energized at the appropriate settings.
(Normal Operation: Cooling with Electric Reheat - Constant Volume)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat)
PN34 – VCEF - Single-Duct Terminal Units
The unit shall operate to a constant volume flow regardless of changes in space temperature. The volume regulator receives the inputs from
high- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changing duct pressure to maintain
constant volume flow. When reheat is applied, heating stages are energized at the appropriate settings.
PN32 – VCWF - Single-Duct Terminal Units
(Normal Operation: Cooling with Hot Water Reheat - Constant Volume)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Direct-Acting Thermostat)
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