©Johnstone Supply eCatalog 216

HYDRONICS Controls

Aquastat ® Controller • Immersion type controller for regulating and limiting the tank temperature in water heaters • Regulates temperature and provides energy cutoff (ECO) action on a temperature rise past the setpoint • Includes a second sensing element that senses average water temperature to minimize stacking • Fluid-filled element operates Micro Switch™ SPST snap-acting switch • ECO switch interrupts the thermocouple circuit or main valve before tank reaches 210°F maximum temperature

• Includes factory-installed immersion well on controller • Internal adjustment screw • Special switch terminal provides three-wire hookup from Aquastat ® controller to gas valve Specifications: • Electrical rating (full load): 2A maximum 24VAC • Differential: 5°F fixed (controller); switch: 20°F (energy cutoff)

Order # Mfg. #

Temp. Range

Capillary Length

Max. Temp.

Pressure Setting

L39-948 L8100B1128 100°F to 180°F; ECO 210°F

39"

200°F (ECO) Energy Cutoff

255 PSI

Immersion Type Hydronic Controllers • For high or low limit temperature control of boiler water or liquid in tanks • Sensing element actuates enclosed snap switch • Tube of heat-conductive compound (see HC Tube column) included with some models • L39-030 for surface mounting; L39-030 and L39-939 include bracket for strap-on mounting

• L39-946 includes remote bulb with 66" capillary Specifications: • Copper bulb dimensions: 3/8" diameter x 2-7/8" L • Case dimensions: 5-5/8" H x 2" W x 2-1/8" D

A

B

Fig. Order # Mfg. #

Switch Action

Temp. Range

Diff.

Insulation Depth

HC Tube

L39-927 L36-915 L39-928 L36-916 L39-929 L39-930 L39-931 L39-932 L39-933 L4006A1009 SPST, Breaks on Temp. Rise 100°F to 240°F L4006A1017 SPST, Breaks on Temp. Rise 100°F to 240°F L4006A1678 SPST, Breaks on Temp. Rise 100°F to 240°F L4006A1959 SPST, Breaks on Temp. Rise 40°F to 180°F L4006A1967 SPST, Breaks on Temp. Rise 100°F to 240°F L4006A2007 SPST, Breaks on Temp. Rise 100°F to 240°F L4006B1007 SPST, Makes on Temp. Rise 100°F to 240°F L4006B1155 SPST, Makes on Temp. Rise 100°F to 240°F L4006B1163 SPST, Makes on Temp. Rise 100°F to 240°F L4006E1091 SPST, Breaks on Temp. Rise 130°F to 270°F L4006H1004 SPST, Breaks on Temp. Rise 100°F to 240°F A L39-029 L4006E1067 SPST, Breaks on Temp. Rise 130°F to 270°F L39-938 L39-939 B L39-940 L4008A1015 SPST, Breaks on Temp. Rise 100°F to 240°F

A A A A A A A A A A A B A A A B

5°F Fixed

1-1/2" 1-1/2" 1-1/2" 1-1/2" 3"

No No

5°F to 30°F Adj. 5°F to 30°F Adj. 5°F to 30°F Adj. 5°F to 30°F Adj. 5°F to 30°F Adj. 5°F to 30°F Adj. Manual Reset Manual Reset Manual Reset 5°F to 30°F Adj. Manual Reset 5°F to 30°F Adj. 5°F to 30°F Adj. 5°F to 30°F Adj. 5°F to 30°F Adj. 2 Fixed 5°F Fixed

Yes Yes

No No No

3"

1-1/2"

3" 3" 3" 3" 3" — — 3" 3" 3" 3"

Yes

No

Yes

No

Yes

No

L39-941 L36-917

L4008E1156 SPST, Breaks on Temp. Rise 130°F to 270°F

Yes Yes

L6006A1145 SPDT

100°F to 240°F 65°F to 200°F 100°F to 240°F 100°F to 240°F

L39-030 L6006C1018 SPDT L39-945 L6006A1244 SPDT L39-946 L6008A1192 SPDT

No No No

Electrical Ratings

-------F/L Amps-------

-------L/R Amps-------

-------F/L Amps-------

-------L/R Amps-------

Sample

120V

240V 5.1A

120V 48A

240V

Sample

120V 2.6A

240V 1.3A

120V

240V 7.8A

All Models except L36-916

8A

30.6A

L36-916

15.6A

Immersion Wells • For use with Immersion Type Hydronic Controllers from Honeywell

• L37-829 for use with L37-826 Triple Aquastat relay

Order # Mfg. # L37-828 121371A L37-829 121371B

Conn. Size 1/2" NPT 3/4" NPT

Mounting

Well Assembly Well Assembly

530

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