Tekmar Difference Setpoint Control 157 – Variable Speed
$421.67
The Difference Setpoint Control 157 is designed to use a variable speed pump to transfer heat from an intermittent heat source to a storage tank. It can be used in many different solar applications, including closed systems, drainback, or heat dump installations.
Out of stock
Two sensors are used to measure the temperature at the source and at the storage location, and begin heat transfer when there is a positive difference between them. This product uses variable speed technology to operate a permanent capacitor wet rotor circulator to vary the rate at which heat transfer occurs.
Features
- 120 V (ac) powered pump outputs
- Certified to CSA and UL standards for use in the USA and Canada
- Displays and logs total amount of energy transfer in BTU or kWh
- Drainback capability
- External heat exchanger mode
- Freeze Protection
- Heat Dump operation
- Heat supplement mode
- Optional auxiliary sensor input to be used in heat dump and heat supplement modes
- Second On/Off pump
Technical
Specifications
| Control | Microprocessor control. This is not a safety (limit) control |
| Packaged weight | 1.5 lb. (670 g) |
| Dimensions | 4-3/4″ H x 2-7/8″ W x 7/8″ D (120 x 74 x 22 mm) |
| Enclosure | White PVC plastic, NEMA type 1 |
| Approvals | CSA C US, meets class B: ICES & FCC Part 15 |
| Ambient conditions | Indoor use only, 32 to 104°F (0 to 40°C), RH ≤90% Non-condensing |
| Power supply | 24 V (ac) ±10%, 50/60 Hz, 3 VA |
| Var. pump | 120 V (ac) 2.4 A (FLA), 5 A (LRA), 1/6 hp |
| Pump 2 | 120 V (ac) 5 A, 1/6 hp |
| Demand | 24 V (ac) 2 VA |
| Sensors | NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 |
| -Included | Universal Sensor 071 and Solar Sensor 085 |
| -Optional | tekmar type #: 071, 078, 082, 085 |
| Warranty | Limited 3 Year Warranty |
| Weight | 1 kg |
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