PSC Mini Pressure Control
SPDT
Switch Contacts
1
The PSC Mini Pressure Control provides the ultimate in reliability
and exibility in a commercial grade mini pressure control. A
standard plug connectable design simplies 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.
Temperature Pressure Controls
R-410A
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 specications
• 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 conguration
Compatibility
– HFC, HCFC, CFC
Agency Approvals
– UL/CUL/DIN/TÜV, depending upon conguration
2004FC-118 R13 (01/14) Emerson Climate Technologies
Switch Action
• SPDT Standard
• 1–2 Open on Rise
Close on Fall
• 1–4 Close on Rise
Open on Fall
TPC 8
Pressure
-
+
2
4
PSC Mini Pressure Control
Temperature Pressure Controls
Nomenclature example: PSC-W6S
PSC W 6 S
Product Name Function Pressure Range/Contacts Pressure Connections
A = Pressure control, automatic, high or low
pressure applications (Single diaphragm option,
158° F rating, Range 1-5 only, without snubber)
(Bellows option, 300° F rating, with snubber,
Range 6 only)
B = Pressure cut-out, external manual reset,
DIN/TUV approved (Double diaphragm option,
158° F, without snubber, Range 1-5) (Bellows
option, 300° F rating, with snubber, Range 6
only)
R = Pressure control, external manual reset,
high or low pressure applications (Single diaphragm option, 158° F rating, Range 1-5 only,
without snubber) (Bellows option, 300° F rating,
with snubber, Range 6 only)
W = Pressure limiter, automatic, DIN/TUV
approved (Double diaphragm option, 158° F,
without snubber, Range 1-5) (Bellows option,
300° F rating, with snubber, Range 6 only)
Standard Contacts
1 = Low pressure 15” Hg to 90 psig
5 = High pressure 100 to 465 psig
6 = High pressure 145 to 623 psig
Microswitch Contacts
J = Low pressure 15” Hg to 90 psig
K = 1 m cap tube w/are nut 7/16”-20 UNF (range 1-5)
L = 1/4” ODM solder w/1 m cap tube (range 1-5)
S = 7/16”-20 UNF female, Schrader depressor (range 1-6)
Specification Selection Table
Electrical
-
Ratings
2.5 FLA/15 LRA
6 FLA/36 LRA 695 PSIG
PCN
Type and
Description
High Event
Range (PSIG)
Differential
Range (PSID)
Setting
Reset
Function
Pressure
Connection
Electrical Con
netion
Low Pressure Controls
097815 PSC-AJS
097849 PSC-A1S 9 Low / 15 High 5/15 6 FLA/36 LRA
1
15” to 90
4 Low / 7 High 1.5/6
Auto
1/4” SAE Female
with Valve
Depressor
DIN Plug with 1/2”
NPTF Hub for Flex
Conduit Connection
36” Cable
PCN High Pressure Contols
097793 PSC-W6S
097998 PSC-B6S 395 Manual
1
Micro-Switch Construction.
2
All switches SPDT ratings stated are 1 side only 120/240 VAC. Opposite switch side – 1/2 amp pilot duty 120/240.
145 to 623 72 Low / 87 High
320/395 Auto
Same as above,
plus stainless steel
bellows with snubber
DIN Plug with 1/2”
NPTF Hub for Flex
Conduit Connection
36” Cable
Maximum
Over
Pressure
360 PSIG
Mounting
Free Standing
Direct Mount
Free Standing
Direct Mount
2004FC-118 R13 (01/14) Emerson Climate Technologies
TPC 9
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