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Honeywell PA404 Pressuretrol Controller

Pressuretrol Controller
PA404

The PA404 is a series 40 (2-wire, SPST) Pressuretrol controller for use in 24, 120, 240 or 277 volt control circuits or in self powered (millivoltage) applications.

• 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.

Select a link under the "item" tab below to order.

Cat #Switching ActionApplication:Adjustable Operating Pressure RangeMaximum Operating PressureSwitch Type
PA404A1025Safety control for steam heating boilers3 psi to 15 psi20 psiSPST snapacting switch
* PA404A1033Breaks at setpoint on pressure fall; SPST makes at set point plus differential on pressure rise.Safety control for steam heating boilers0.5 psi to 9.0 psi20 psiSPST snapacting switch
* PA404B1023Breaks at setpoint on pressure fall; SPST makes at set point plus differential on pressure rise.Used with suspension type unit heaters0.5 psi to 9.0 psi20 psiSPST snapacting switch
Dimensions, Approximate: 4-15/32 in. high x 3 3/8 in. wide x 2-1/4 in. deep (114 mm high x 86 mm wide x 58 mm deep)
Electrical Ratings: 0.25 A @ 0.25 to 12 Vdc
Electrical Ratings (120 Vac, Full Load): 8.0 A
Electrical Ratings (120 Vac, Locked Rotor): 48.0 A
Electrical Ratings (120 Vac, Resistive): 8.3 A
Electrical Ratings (240 Vac, Full Load): 5.1 A
Electrical Ratings (240 Vac, Locked Rotor): 30.6 A
Electrical Ratings (240 Vac, Resistive): 8.3 A
Electrical Ratings (277 Vac, Resistive): 7.2 A
Electrical Ratings (sealed): 150 VA @ 277 Vac
Differential Pressure Range: Subtractive: 1 to 5 psi (7 to 35 kPa);
Additive: 1 to 5 psi (7 to 35 kPa)
Pressure Ratings (Set Point): Recommended minimum set point is differential setting plus 1-1/2 psi.
Pressure Surge (max.): 50 psi (345 kPa)
Pressure Sensing Element: Stainless Steel diaphragm
Adjustable Scale Range: 0.5 psi to 9 psi (3 kPA to 62 kPa)
Materials (Case): Gray enamel finish
Pipe Connections: 1/4 in. female pipe threads
Operating Humidity Range (% RH): 95% RH, non-condensing
Maximum Ambient Temperature: 150 F (66 C)
Approvals:
Canadian Standards Association: CSA Listed: File no. LR1620.
Underwriters Laboratories Inc. UL Listed: File no. MP466, Guide no.
MBPR.


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