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T12 through T33 Series (2211 through 2218 Series)
Figure 4 T27 Typical Two Pipe Application.
Figure 5 T27 Typical Three Pipe Application.
Figure 6 T32 Typical Application.
Figure 7 T33 Typical Application.
16psig Day
25 psig Night
T27
Thermostat
To N.O.
Heating Valve.
Manual Override And
Remote Reset
Manual override lever.
BM
R
D
/
N
1
1
16psig Day
25 psig Night
T27
Two-Temperature
Thermostat
To Unit Ventilator Control
Components (Typically)
Manual Override And
Remote Reset
To P.E. on unit Ventilator
Subpanel (Typically)
Day 0 psig - Manual 2 psig or less
Night 25 psig
Manual override lever.
BM
R
D
/
N
1
1
Unit
Heating/Cooling
Coil
Supply
AAB
Return
B
V
Valve
T32 Thermostat
16psig Summer
25 psig Winter
BM
S
/
W
Unit
Heating/Cooling
Coil
Supply
AAB
Return
B
V
Valve
T33 Thermostat
15psig Winter
20 psig Summer
BM
S
/
W
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