Brochure

Emerson Climate Technologies
275
Temperature Pressure Controls
The PSC Mini Pressure Control provides the ultimate in reliability
andexibilityinacommercialgrademinipressurecontrol.A
standardplugconnectabledesignsimpliesinstallationand
service. The SPDT switch allows the addition of alarm circuits
on high or low pressure applications. Models with high
temperature bellows and built-in pressure pulsation snubbers
make the
PSC ideally suited for compressor head mounting high pressure
limit control applications—automatic or manual reset versions
are available.
PressureRanges/DifferentialalsomakethePSCcontrolsideally
suited for condenser fan cycling applications. Low Pressure
versions with standard or narrow differential switches make
these controls ideally suited low pressure limit or back-up safety
controlsonelectronicallycontrolledsystems.Numerousoptions,
such as panel mount or capillary connections are available on
high volume applications. Standard on all models are worldwide
agency approvals.
Typical Applications
• HighPressureLimit/Alarm
• CondenserFanCycling
• LowPressureLimit/Alarm
• LowPressureCycling(Back-Up)
• DefrostTermination/FanDelay
• RuptureGuardAlarm
Features
• CommercialGradeHigh/Low/CondenserFanCycling
 PressureControlsforuseonRefrigeration/ACApplications
• Mini-Size2’’x1-1/2’’x2-3/4’’
• StandardSPDTSwitchAction
• AutomaticorManualReset
• Modelsavailablewithhightemperaturebellowsandbuilt-in
pressure pulsation snubber for direct head mount high
pressure sensing/limit applications
• PlugConnectablewithhubfor1/2’’exibleconduit
• Factorypresettocustomer’sdesiredpressurespecications
• Precise,repeatablesettings
• Narrowdifferential‘‘Micro’’switchavailableonlowpressure
models
Specifications
• WorldwideApprovals:UL/CUL/VDE/TÜV
• UL/CULlenumber:E85974
Electrical Ratings–SPDT Switch
• StandardSwitch–High/LowPressure
  – LoadContact:6FLA–36LRA–120/240VAC
   PilotDuty:240VA@120,480VA@240VAC
  – BackContact0.5Amp120/240VACPilotDuty
• MicroSwitch–LowPressure
  – 2.5FLA–15LRA–120/240VAC
   PilotDuty:120VA@120,240VA@240VAC
  – BackContact0.5Amp120/240VACPilotDuty
Ambient Temperature
  – Storage:–30°to+160°FOperating:–20°to+140°F
• LowPressure
  – Singlediaphragm
   Maximummediatemperature150°F
• HighPressure
  – Bellowsdesign
   Maximummediatemperature300°F
  – InternalPressurePulsationSnubber
available for direct head mount
Protection
  – Protectfromrain,directsunlightandexteriordamage
Weight
  – Approximately0.25pound,dependinguponconguration
Compatibility
  – HFC,HCFC,CFC
Agency Approvals
  – UL/CUL/DIN/TÜV,dependinguponconguration
Switch Action
• SPDTStandard
 • 1–2 OpenonRise
Close on Fall
 • 1–4 CloseonRise
    OpenonFall
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+
Pressure
SPDT
Switch Contacts
4
2
1
PSC Mini Pressure Control