Daytona
Description
Control Description: The Difference Setpoint Control 155 is a microprocessor-based difference setpoint control intended for solar, wood stove or other intermittent heat source applications. The 155 is provided with Solar Drainback and Solar Draindown Operation and a Minimum Source Setpoint temperature setting to help prevent the freezing of pipes in a solar heating system. A Maximum Storage Setpoint can be used to help prevent the storage water temperature from exceeding a maximum limit. Literature + D 155, A 155's, 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 C US, meets ICES & FCC regulations for EMI/RFI Ambient Conditions + Indoor use only, -20 to 120+F (-30 to 50+C), < 90% RH non-condensing Power Supply + Class 2, 24 V (ac) +10% 50/60 Hz 2 VA or 32 V (dc) +20% 0.04 A Relays + 240 V (ac) 10 A, 1/3 hp, pilot duty 240 VA 2 A Sensors Included + NTC thermistor, 10 kΩ @ 77+F (25+C +0.2+C) +=3892 Two of Universal Sensor 071 Optional Devices + tekmar type #: 070, 071, 072, 073, 076, 077, 078, 079 Programmed Settings + Ten year memory backup Control Accuracy + +0.5+F (+0.3+C) with up to 500 feet (150 m) of 18 AWG wire to sensors ΔT Setpoint + 2 to 90+F (1 to 50+C) ΔT Differential + 2 to 45+F (1 to 25+C) Minimum Source + -22 to 185+F (-30 to 85+C) Min. Source Diff'l + 2 to 45+F (1 to 25+C) Maximum Storage + -4 to 248+F (-20 to 120+C) Max Storage Diff'l + 2 to 45+F (1 to 25+C) Temperature Display + Fahrenheit / Celsius
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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:
Class 2
24 V (ac)
Relays:
240 V (ac) 10 A-1/3 hp-pilot duty 240 VA 2 A
Min Temp (F):
-22°F
Temperature Range (F):
-22°-185°F
Max Temp (F):
185°F
Control:
Microprocessor Control
Weight (lbs):
.7 lbs
Accuracy:
+/- 0.5°F w/ up to 500 feet of 18 AWG wire to sensors
Sensors:
NTC Thermistor 10 k ohm @ 77°F
Programmed Settings:
Ten year memory backup
Enclosure Type:
C
Temp Change at Setpoint:
2 to 90°F
Temp Change at Differential:
2 to 45°F
Min Source Differential:
2 to 45°F
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