Description
Control Description
The Difference Setpoint Control 156 is designed to operate an on/off pump to transfer heat from a heat source to a storage tank. The control operates based on a setpoint temperature difference (ΔT). The relay turns on when the ΔT rises above the setpoint and turns off when the ΔT falls below the setpoint less the differential. The Source Minimum and Storage Maximum settings turn off the relay when heat transfer is no longer desirable. Potential applications include using solar collectors or a wood boiler as a heat source.
  • Literature: D 156, A 156, D 001, D 070
  • Control: Microprocessor control; This is not a safety (limit) control
  • Packaged Weight: 0.8 lb. (360 g)
  • Enclosure: C, White PVC plastic
  • Dimensions: 4-3/4" H x 2-7/8" W x 7/8" D (120 x 74 x 22 mm)
  • Approvals: CSA certified to CSA 22.2 No 24 and UL 873
  • Ambient Conditions: Indoor use only, -20 to 120¼F (-30 to 50¼C), < 90% RH non-condensing
  • Power Supply: 24 V ¼10% 50/60 Hz 2 VA, 24 V (dc) ¼10% 0.04 A
  • Relay: 240 V (ac) 10 A 1/3 hp, pilot duty 240 VA
  • Sensors Included
  • NTC thermistor, 10 komega @ 77¼F (25¼C ¼0.2¼C) +=3892 Two of Universal Sensor 071
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Specs
Application:
Alternative Energy
Width:
2-7/8"
Height:
4-3/4"
Stages:
Difference Setpoint
User Interface:
Push Button
LCD
Voltage:
24v
Depth (Inches):
7/8"
Ambient Conditions:
Indoor Only: -20°-120°F < 90% RH non-condensing
Power Supply:
24V (ac)
24V (dc)
Relays:
240 V (ac) 10 A-1/3 hp-pilot duty 240 VA
Max Temp (F):
284°F
Min Temp (F):
-76°F
Temperature Range (F):
-76°-284°F
Control:
Microprocessor Control
Weight (lbs):
.7 lbs
Sensors:
NTC Thermistor 10 k ohm @ 77°F
Enclosure Type:
C
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