Robertshaw 84374 Series Quick Start Manual

GENERAL DESCRIPTION
The patented* No. 84374-Series Pressure Sensor contains
a weather-proof, snap-acting valve operated by pressure
variation around the integral sensing element. Depending
upon model used, it vents or blocks a pneumatic signal
when the setpoint is reached and is available with either
automatic or manual reset. The sensor has adjustable
differential (auto reset versions only) and setpoint,
provision for piped vent operation, and is field reversible.
Setpoint is virtually unaffected by control pressure change
or, in the case of piped vent versions, vent backpressure
change. In the auto reset versions, reset differential can be
changed without shifting setpoint.
For correct operation, control pressure must be provided
thru a .81 mm (.032") diameter or smaller orifice.
*Patent 3,986,524
MODELS AVAILABLE
843714-
Table 1 Table 2
Table 1
Suffix Description
A Direct Acting - Vents on Increase
B Reverse Acting - Closes Vent on Increase
C Direct Acting - Vents on Increase
Table 2
Suffix
1
2
See Page 2 for SPECIFICATIONS
Form No. P-2356, Rev. B
Setpoint Range - kPa (In. H z0)
1.7 - 7.0 (7 - 28)
3.5-17.5(14-70)
PRODUCT SPECIFICATION 84374 SERIES
84374-A, C Series
Vents on Increase
(Direct-Acting)
Reset
Auto
Auto
Manual
ORDERING INFORMATION
Specify:
1. Model
2. Control Pressure-If not specified, sensor is set using
207 kPa (30 psi).
3. Setpoint-If not specified, set as minimum.
4. Differential (Automatic Reset models only)-If not
specified, set at standard.
5. Tagging Information
1
Sales Manual Section 335
Pressure Sensor
No. 84374-Series
84374-B Series
Closes Vent on Increase
(Reverse-Acting)
J.I.C. Symbols