INSTALLATION INSTRUCTIONS
69-2205-03
50027910-001
Differential Pressure Switch
APPLICATION
The differential pressure switch senses changes in
duct air pressure to confirm air movement, providing
a safeguard that airflow is present during the
operation of installed IAQ equipment.
Fig. 1. Pressure switch.
SPECIFICATIONS
SPST:
normally open, snap-acting contacts
Pressure setpoint contacts:
change at 0.04 in. W.C.
Electrical
5 amp resistive @ 24VAC
One common (C), One Normally Open (NO) quick-
connect terminals
Operating Temperature:
-40F to 190F (-40C to 88C)
Pressure Sample Taps
Black positive pressure tap. 1/4 in. outside diameter
Grey negative pressure tap. 1/4 in. outside diameter
Use with 1/4 in. inside diameter tubing (10 ft pro-
vided)
M27300
Table 1. Parts Included.
Item
Quantity
Rubber Grommet
2
Tubing Fitting Elbow
2
Tubing, 1/4 in. ID
10 ft
Differential Pressure Switch (Fig. 1)
1
Screws, #8 x 3/4 in. sheet metal
2
Terminal Adaptor
2
M27302
M27323
