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
157 Installation & Operation
157 Application
157 Submittal Sheet
Product Website
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 |
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