©Johnstone Supply eCatalog 216

HYDRONICS Controls

Zone Valves • Valve stem made of stainless steel • Automatic recycling manual operator shows valve position at all times • Built-in auxiliary contacts to control burner or circulator relay • Motor can be removed from valve assembly without draining system • L39-521 , L39-522 and L39-523 have valve current of 0.4A only during opening or closing • L39-524 , L39-525 and L39-526 have valve current of .52A when opening and 0.2A when fully open

Specifications: • Time cycle: L39-521 , L39-522 and L39-523 : 45 seconds open, 45 seconds closed; L39-524 , L39-525 and L39-526 : 45 seconds open, 60 seconds closed • Max. temp: 240°F • Electrical rating: 2A @ 24VAC • Max. system pressure: 50 PSI WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Order #

Mfg. #

Configuration Conn. Size

Cv

De-Energized Position

Order #

Mfg. #

Configuration Conn. Size

Cv

De-Energized Position

L39-521 L39-522 L39-523

L39-524 L39-525 L39-526

1311-102 3-Wire 1311-103 3-Wire 1311-104 3-Wire

3/4"

23.5 NC 37.0 NC 42.2 NC

1361-102 2-Wire 1361-103 2-Wire 1361-104 2-Wire

3/4"

23.5 NC 37.0 NC 42.2 NC

1"

1"

1-1/4"

1-1/4"

Automatic Change-Over Switches • SPDT control provides automatic change-over of thermostat for combination hot and chilled water systems • Opens at 85°F, closes at 70°F

• Available for 1/2" (5/8" O.D.) tubing • L36-146 has a conduit connection Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

F/L Amps @ 120V

F/L Amps @ 240V

L/R Amps @ 120V

L/R Amps @ 240V

Order #

Mfg. # 752-1 752-2

Res. Amps

VA Rating

L36-145 L36-146

7.5 7.5

3.75 3.75

45 45

22.5 22.5

15 15

125 125

Spring Return Zone Valves • Two-Way zone valve • Spring return normally closed with micro switch

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Electrical Conn.

De-Energized Position

Max. Working Pressure

VA Rating

Max. Ambient Temp.

Min. Fluid Temp.

Max. Fluid Temp.

Order #

Mfg. # Description

Conn. Size Cv

Temp. Range

L47-559

Z55 3/4" Sweat, 7.5Cv, 20 PSI Delta P, Zone valve, w/ micro switch Z56 1" Sweat, 7.5Cv, 20 PSI Delta P, Zone valve, w/ micro switch Z57 1 1/4" Sweat, 7.5Cv, 20 PSI Delta P, Zone valve, w/ micro switch

3/4" SWT 7.5 24V Closed

32 - 240 F 300 PSI

7 104F

32 F 240F

L47-560

1" SWT 7.5 24V Closed

32 - 240 F 300 PSI

7 104F

32F 240F

L47-561

1 1/4" SWT 7.5 24V Closed

32 - 240 F 300 PSI

7 104F

32F 240F

523

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