2004FC-118 R13 (01/14)
Emerson Climate Technologies
TPC 8
Temperature Pressure Controls
The PSC Mini Pressure Control provides the ultimate in reliability
and flexibility in a commercial grade mini pressure control. A
standard plug connectable design simplifies installation and
service. The SPDT switch allows the addition of alarm circuits
on high or low pressure applications. Models with high tempera-
ture 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’’ flexible conduit
• Factory preset to customer’s desired pressure specifications
• Precise, repeatable settings
• Narrow differential ‘‘Micro’’ switch available on low pressure
models
Specifications
• Worldwide Approvals: UL/CUL/VDE/TÜV
• UL/CUL file 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 configuration
Compatibility
– HFC, HCFC, CFC
Agency Approvals
– UL/CUL/DIN/TÜV, depending upon configuration
PSC Mini Pressure Control
Switch Action
• SPDT Standard
• 1–2
Open on Rise
Close on Fall
• 1–4
Close on Rise
Open on Fall
-
+
Pressure
SPDT
Switch Contacts
4
2
1
R-410A
