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Honeywell Tradeline® PA404B1023/U Pressuretrol Controller, 0.5 to 9 psi Control, Snap-Acting SPST Switch, 1 to 5 psi Differential
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- The PA404 is a series 40 (2-wire, SPST) pressuretrol controller for use in 24, 120, 240 or 277 V control circuits or in self powered (millivoltage) applications.
Tradeline® Pressuretrol Controller, 0.5 to 9 psi Control Range, Snap-Acting Switch, SPST, 1 to 5 psi Differential Pressure Range, 1/4 in FNPT, Enamel Case, Gray, 4-15/32 in H x 3-3/8 in W x 2-1/4 in D
- With additive 1 to 5 psi differential pressure
- The PA404A is a pressure actuated high limit, safety control for steam heating boilers, it breaks an electrical circuit to shut down the burner if steam pressure rises above a safe level
- The PA404B is used with suspension-type unit heaters to make the fan circuit when a pressure rise indicates the presence of steam
- Each model contains an SPST Micro switch snap-acting switch
- Sensitive pressure-actuated diaphragm expands or contracts with pressure variations, moving a lever mechanism which operates the snap switch
- A screw on top of the case allows set point adjustment without removing the cover
- Differential is adjusted by means of a dial located inside the case
- 20 psi maximum safe pressure
- Electrical Rating: 0.25 A at 0.25 to 12 VDC, 120 VAC, Resistive: 8.3 A, 240 VAC, Resistive: 8.3 A, 277 VAC, Resistive: 7.2 A
- 95% RH, non-condensing humidity
- 150 deg F ambient temperature
- Additive or subtractive differential
- Switching Action: Makes at set point plus differential on pressure rise, breaks at set point on pressure fall
- 50 psi surge
- Pilot Duty Rating: 150 VA at 277 VAC
- Control Range0.5 to 9 psiSwitch ActionSPSTSwitch TypeSnap-ActingColorGrayConnection Type1/4 in FNPTDifferential Pressure Range1 to 5 psiDimensions4-15/32 in H x 3-3/8 in W x 2-1/4 in DFinishEnamel CaseManufacturerHoneywellManufacturer #PA404B1023/U