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PA404B1023/U Pressuretrol Controller with Additive 1 to 5 psi Differential Pressure
Part Number: PA404B1023/U Brand: Resideo Technologies IncPressuretrol Controller with Additive 1 to 5 psi Differential Pressure
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Does not ship to VA, United States
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.
Features- 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
Specifications
Dimensions
- 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
Maximum Safe Operating Pressure
- 20 psi
- 137 kPa
Materials
- Case: Gray enamel finish
Comments
- Recommended minimum set point is differential setting plus 1 1/2 psi.
Electrical Ratings
- 0.25 A @ 0.25 to 12 Vdc; 120 Vac, Resistive: 8.3A; 240 Vac, Resistive: 8.3A; 277 Vac, Resistive 7.2A
Approvals, Underwriters Laboratories Inc.
- UL Listed: File no. MP466, Guide no. MBPR.
Approvals, Canadian Standards Association
- CSA Listed: File no. LR1620.
Tradeline Value
- Tradeline
Operating Humidity Range
- 95% RH, non-condensing
Temperature Ratings
- 66 °C - Maximum Ambient
- 150 °F - Maximum Ambient
Sensor Element
- Stainless Steel diaphragm
Operating Range
- 0.5 psi to 9.0 psi Adjustable
- 3 kPa to 62 kPa Adjustable
Differential Pressure Range
- 1 to 5 psi Adj.
- 7 to 35 kPa Adj.
Differential Type
- Additive or Subtractive
Switching Action
- Makes at set point plus differential on pressure rise; Breaks at set point on pressure fall
Pressure Surge
- 50 psi
- 345 kPa
Adjustable Scale Range
- 0.5 psi to 9 psi
- 3 kPa to 62 kPa
Pilot Duty Ratings
- 150 VA @ 277 Vac
Switch Type
- SPST snap-acting switch
Pipe Connection
- 1/4 in. female pipe threads
- Used with Suspension Type Unit Heaters
