©Johnstone Supply eCatalog 216

REFRIGERATION & AIR CONDITIONING Commercial Pressure Controls

Differential Pressure Controls • Measures the pressure difference between supply and return lines, repositioning switching mechanism to cause corrective action of supplementary control equipment • Provides differential pressure sensing on chillers, water cooled condensers or heating systems for proof of flow • Can be used as lube oil failure cutout for refrigeration compressors • Also suitable for use as refrigeration pressure limiting controls • Pressure differential setting easily changed without removing cover • Includes universal mounting bracket • Brass bellows

Specifications: • Switch action: SPDT, snap-acting • Range pressure differential: 8 to 60 PSI • Switch differential: 1.5 fixed • Pressure connections: B13-349 , 1/4" male flare; B13-350 , 1/4" FNPT • 120VAC — maximum full load 6A; locked rotor 36A; maximum resistive load 10A; maximum pilot duty 125VA • 240VAC — maximum full load 3A; locked rotor 18A; maximum resistive load 10A; maximum pilot duty 125VA Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

A

B

Each

Fig. Order #

Mfg. #

Conn. Size

B13-349 B13-350

A B

P74FA-1C P74FA-5C

1/4" Male Flare 1/4" Female NPT

539.00 585.00

Differential Pressure Control • Measures the pressure difference between two sources: supply lines and return • A change in differential pressure repositions the switching mechanism to cause corrective action of the supplemetary control equipment • Easy to change pressure differential (without removing cover)

• 36" capillary with flare nut specifications: • Electrical rating: 120VAC — FLA 16, LRA 96 • Maximum resistive load: 16A • Maximum pilot duty: 125VA Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Each

Order #

Mfg. #

Switch Action

Pressure Range PSIG Diff. PSIG

B13-744

P74EA-8C

SPDT

2 to 26

3.5

565.00

Lube Oil Protection Control • 120-second time delay switch opens control circuit to stop compressor when oil pressure is lost • Replaces Copeland #085-0062-00

• Manual reset, alarm circuit standard • Ambient temperature compensated • Super Cap ® capillary protection system • 120/240VAC, maximum pilot duty 720VA

Each

Order # Mfg. #

Reset Type

Pressure Range PSIG Conn. Size

B12-009 P30-5826

Manual

9 Fixed

36" Cap. w/ Flare Nut

755.00

Lube Oil Protection Controls • Used as safety switches to protect refrigeration compressors against low lubricating oil pressure • Seamless stainless steel bellows

• Ambient compensated from -40°F to +140°F to prevent nuisance tripping • SPDT switches Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Reset Type

Switch Action

Pressure Range PSIG

Diff. PSIG Conn. Size

Low Range PSIG}

Low Pressure Diff. PSIG

High Range PSIG Length

Fitting Size

Capillary Length

Each

Order #

Mfg. #

Application

B14-439 B14-440 B14-441 B14-442 B14-444

060B200266 Lube Oil 060B200366 Lube Oil 060B200866 Lube Oil 060B201291 Lube Oil 060B205391 Lube Oil

Auto SPDT 9 Fixed Auto SPDT 9 Fixed Auto SPDT 6 Fixed

9 9 6

1/4" Male Flare Conn. 1/4" Male Flare Conn. 1/4" Male Flare Conn.

29 to 175 9 29 to 175 9 29 to 175 6

29 to 175 — 1/4" Flare 29 to 175 — 1/4" Flare 29 to 175 — 1/4" Flare 29 to 175 — 1/4" Flare

455.00 455.00 455.00 495.00 479.00

Auto SPDT 4.3 to 64 4.3-65 1/4" Male Flare Conn.

29 to 175 4.3-65

Auto SPDT 9 Fixed

9

36" Cap. w/ Flare Nut

29 to 175 9

29 to 175 36"

1/4" 36"

1310

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