2024 WD CATALOG

71R SERIES

71R SERIES

PRESSURE SWITCHES

PRESSURE SWITCHES

RED DOT BINARY TM PRESSURE SWITCHES

RED DOT TRINARY ™ PRESSURE SWITCHES - GENERATION II

This switch assembly performs two distinct func tions. The first function prevents the compressor from operating if system charge is lost or ambient temperature is too low. The second stops compres sor if head pressure increases to unsafe levels. It automatically resets when pressure drops back to normal. Install Binary TM on liquid side of A/C system between condenser and expansion valve, for use with R-12 and R-134a.

Opens

Closes

This switch assembly performs three distinct func tions. The first function prevents the compressor from operating if system charge is lost or ambient temperature is too low. The second stops compres sor if head pressure increases to unsafe levels. It automatically resets when pressure drops back to normal. The third function is a shutter/fan override switch that keeps head pressure within normal range by opening shutters or operating engine fan to increase air flow across condenser when head pressure rises above set valve. Install Trinary on liquid side of a/c system between condenser and expansion valve. For use with R-12 and R-134a systems.

OPENS

CLOSES

Low Pressure Protection

30 - 15 Psig

40 PSIG Maximum (Rising Pressure) 210 - 250 Psig Below (Opening Pressure)

Low Pressure Protection

22.5 ± 7.5 PSIG

40 Psig Maximum (Rising Pressure) 230 ± 20 PSIG 200 - 230 PSIG (Rising Pressure)

(Falling Pressure) 300 - 350 Psig (Rising Pressure)

(Descending Pressure)

High Pressure Protection Shutter Fan/Override

325 ± 25 PSIG 35 - 60 PSIG

High Pressure Protection

Below Closing Pressure

RD-5-4585-0P MOUNTING CONFIGURATION 71R7600

MOUNTING CONFIGURATION

71R7500

71R7000 RD-5-4646-0P 3 ⁄ 8 -24 UNF-2A Male Thread With Bulkhead Type Seal Using a 2-012 "O" Ring.

71R7050 RD-5-4640-0P 7 ⁄ 16 -20 UNF-2B Female Thread For Installation On Male "Schrader" Type Valve.

RD-5-4620-0P

ELECTRICAL 7 AMP Resistive 4 AMP Inductive 28 VOLT D.C. Maximum 2.50 Series Male Tab Terminals BINARY ™ E/C Connection end of BINARY TM

3 ⁄ 8 ” - 24 UNF-2A Male thread with bulkhead seal, 2-012 O-Ring Shutter/fan switch is normally open

3 ⁄ 8 ” - 24 UNF-2A Male thread with bulkhead seal, 2-012 O-Ring Shutter/fan switch is normally closed

SWITCHES

ELECTRICAL 7 AMP Resistive 4 AMP Inductive 28 VOLT D.C. Maximum 2.50 Series Male Tab Terminals TRINARY ™ E/C Connection end of TRINARY TM

SWITCHES

71R7550

71R7650

RD-5-4583-0P

RD-5-4625-0P

7 ⁄ 16 ” - 20 UNF-2B Female thread for male Schrader Shutter/fan switch is normally open

7 ⁄ 16 ” - 20 UNF-2B Female thread for male Schrader Shutter/fan switch is normally closed

1 2

RED DOT BINARY TM HARNESS

71R4511 RD-5-12151-2P RED DOT BINARY TM boot (provides a molded 2 wire connection to Binary switch; lead wires are 28” long.) helps eliminate terminal corrosion and breakage.

4

Terminals 1 & 2 Controls Clutch High/Low Pressure Protection Terminal 1: To compressor clutch “compressor” black wire Terminal 2: To thermostat “AC/Thermostat” black/white wire

3 1 2

RED DOT TRINARY TM HARNESS

Terminals 1 & 2 Controls Clutch High/Low Pressure Protection Terminal 1: To compressor clutch “compressor” black wire Terminal 2: To thermostat “AC/Thermostat” black/white wire Terminals 3 & 4 Controls Fan Clutch or Shutters Terminal 3: To solenoid valve “override” yellow wire Terminal 4: To ignition “DC power” orange wire

71R4501 RD-5-12150-0P TRINARY TM boot ( provides a molded 4 wire connection to Trinary switch; lead wires are 28” long. ) helps eliminate terminal corrosion and breakage.

= Limited to stock on hand

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