Honeywell L404T, L404V specifications Wiring, Using with Preheated Oil

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L404F,T,V PRESSURETROL® CONTROLLERS

OIL PRESSURE

CONTROLLER (AT RIGHT ANGLES TO THE MAIN PIPE LINE)

All wiring must comply with applicable codes and ordinances. All models have terminals (on the MicroSwitch® snap-acting switch) inside the cover and knockouts for conduit and cable. Refer to manufacturer installation and wiring instructions, if available, and to typical hookups shown in Fig. 6 to 10.

L404F PRESSURETROL

HEXAGONAL

FITTING

PIPE NIPPLE

PIPE

WRENCH

MAIN TEE (TURN TO LEVEL THE CONTROLLER)

MAIN PIPE LINE

R

W

B

L1

POWER (HOT)

SUPPLY

1 L2

2

24 VOLT RELAY

M17860

Fig. 4. Mounting an oil pressure controller

directly on the main pipe.

Using with Preheated Oil

When used with preheated oil, a siphon loop (part number 14026) must always be connected between the controller and the main pipe (see Fig. 5) to provide thermal buffering.

OIL PRESSURE

CONTROLLER

24 VOLT

POWER

SUPPLY

1PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2AS SHOWN, SWITCH OPENS ON PRESSURE RISE. REVERSE ACTING (MAKE ON PRESSURE RISE) UNITS ARE WIRED TO R-W TERMINALS AND TERMINAL B IS OMITTED.

M19637A

Fig. 6. L404F in low voltage relay circuit.

4-1/2

TO

5-1/2

(114 TO

140)14026

SIPHON LOOP 1

TEE

PREHEATED OIL SUPPLY LINE

1 1/4 INCH BLACK IRON PIPE WITH 1/4-18 NPT EXTERNAL THREADS ON

BOTH ENDS AND 2-1/4 IN. (57 MM) DIAMETER LOOP.

M17858A

 

LINE VOLTAGE THERMOSTAT

L1 L2 (HOT)

POWER SUPPLY 1

L404F PRESSURETROL

2

R

W

B

MOTOR

Fig. 5. Mounting of a siphon loop, with approximate

dimensions in in. (mm).

WIRING

WARNING

Electrical Shock Hazard.

Can cause severe injury, death or property damage.

Disconnect the power supply before beginning wiring. More than one power supply disconnect may be required.

1PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2AS SHOWN, SWITCH OPENS ON PRESSURE RISE. REVERSE ACTING (MAKE ON PRESSURE RISE) UNITS ARE WIRED TO R-W TERMINALS AND TERMINAL B IS OMITTED.

M19638A

Fig. 7. L404F in a typical 2-wire control circuit.

5

71-2429—2

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Contents Contents Features ApplicationOrdering Information SpecificationsModel Model Number KPa PsiWhen Installing This Product… InstallationSwitch Ratings Amperes Switch State 120 Vac 240 Vac Dimensions See FigLocation and Mounting L404T,V Location and Mounting L404FUsing with Preheated Oil WiringScaleplate Adjustment Settings and AdjustmentsSetpoint Adjustment Checkout Automation and Control Solutions