C437D,E GAS PRESSURE SWITCHES
68-0286 2
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
SPECIFICATIONS
Table 1. Models.
a
Designated Manual Reset 2; the trip-free reset mechanism does not permit the switch to function as an automatic-reset device
when the manual reset lever is held in the Reset position.
Table 2. Switch Ratings (In Amperes).
Switch:
Snap Switch (spst).
Differentials:
Fixed, nominal; measured at pressure indicated in Table 3.
Table 3. Pressure Differentials.
a
in. = inches of water.
b
Restrictive orifice in inlet pressure channel to compensate for momentary surges in gas pressure.
c
Subtractive models: switching action occurs on pressure rise to the setpoint.
d
Additive models: switching action occurs on pressure fall to the setpoint.
Pressure Ranges (Scale Range):
Specify one:
1/2 to 5-1/2 inches of water (0.1 to 1.4 kPa).
1 to 26 inches of water (0.5 to 7 kPa).
1/2 to 5 lb per sq in. (3 to 35 kPa).
1 to 10 lb per sq in. (5 to 70 kPa).
Model Number
Switch Action
(Response at Setpoint to Pressure Change)
Manual Reset
a
(Locks Out on Switch Break)
C437D spst, breaks on rise Yes
C437E spst, breaks on fall Yes
Voltage
C437D,E
Full Load Locked Rotor Resistive Load
120 Vac 8.0 48.0 10.0
240 Vac 5.1 30.6 5.0
Model Numbers
Pressure Range
a
Type
a
1/2 to 5-1/2
in. (0.1 - 1.4
kPa)
Differential
Measured
at 1/2 in.
1 to 26 in.
b
(0/5 - 7 kPa)
Differential
Measured at
15 in.
1/2 to 5 psi (3
- 35 kPa)
Differential
Measuremen
t at midscale
1 to 10 psi (5 -
70 kPa)
Differential
Measurement
in. kPa in. kPa psi kPa psi kPa
C437D — — 1-3/4 0.44 1/2 3.45
1
c
6.89
c
Subtractive
c
C437E 0.25 0.06 1-1/4 0.31 1/4 1.72 1/2 3.45
Additive
d
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