WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions
11
6.
Press
to confirm the selection.
7.
Change the
setpoint pressure
as desired
(Figure 11).
a.
Press the Up button
to increase the
branch line pressure at setpoint. The valid
range is 1 to 22 psig (7 to 152 kPa), adjustable
in increments of 0.5 psig (3 kPa). The default
setting is 9 psig (62 kPa).
b.
Press the Down button
to decrease the
branch line pressure at setpoint.
8.
Press
to confirm the selection.
9.
Change the
gain/sensitivity
as desired
(Figure 12).
a.
Press the Up button
to increase the
gain/sensitivity. The valid range is 1 to 5 psi/F°
(13 to 65 kPa/C°), adjustable in increments of
0.5 psig (3 kPa). The default setting is 2 psi/F°
(26 kPa/C°).
b.
Press the Down button
to decrease the
gain/sensitivity.
10. Press
to confirm the selection.
11. Change the
proportional band – proportional
range/throttling range
as desired (Figure 13).
a.
Press the Up button
to increase the
proportional band – proportional range/
throttling range. The valid range is 0 to 10F°
(0 to 6C°), adjustable in increments of 1F°
(0.6C°). The default setting is 6F° (3.6C°).
b.
Press the Down button
to decrease the
proportional band – proportional range/
throttling range.
12. Press
to confirm the selection.
13. Change the
unoccupied mode pressure
as
desired (Figure 14).
a.
Press the Up button
to increase the
branch line pressure during Unoccupied Mode
periods. The valid range is 0 to 22 psig (0 to
152 kPa), adjustable in increments of 0.5 psig
(3 kPa). The default setting is 0 psig (0 kPa).
b.
Press the Down button
to decrease the
branch line pressure during Unoccupied Mode
periods.
FI
G
:d
rct
_a
ct
ng
SP
Psi
9.0
Gain
2.0
Prop
Bnd
6.0
Unoc
Psi
0.0
Dir
Acting
Figure 11: Changing the Setpoint Pressure
+
-
FI
G
:g
a
in
SP
Psi
9.0
Gain
2.0
Prop
Bnd
6.0
Unoc
Psi
0.0
Dir
Acting
Figure 12: Changing the Gain/Sensitivity
+
-
FI
G
:pr
p
rt
n
l_
b
n
d
SP
Psi
9.0
Gain
2.0
Prop
Bnd
6.0
Unoc
Psi
0.0
Dir
Acting
Figure 13: Changing the Proportional Band –
Proportional Range/Throttling Range
+
-
FI
G
:u
noc
cp
d_m
d
e_p
rs
sr
SP
Psi
9.0
Gain
2.0
Prop
Bnd
6.0
Unoc
Psi
0.0
Dir
Acting
Figure 14: Changing the Unoccupied Mode
Pressure
+
-
