tekmar 157 Difference Setpoint Control - Manual

1 of 16 © 2010 D 157 - 06/10
D 157
06/10
- Data Brochure
Difference Setpoint Control 157
The Difference Setpoint Control 157 is designed to operate a variable speed pump to transfer heat from a heat source
to a storage tank. Varying the speed of the pump provides fast and accurate temperature control to maintain the target
temperature difference (ΔT). Additional minimum and maximum setpoints turn off the pump when heat transfer is no longer
desirable. Potential applications include using solar collectors or a wood boiler as a heat source.
Additional functions include:
120 V (ac) powered pump outputs
Second On/Off pump with 4 modes of operation
Optional auxiliary sensor input to be used in heat dump and heat supplement modes
Freeze Protection
Displays total amount of energy transfer in BTU or kWh
Certified to CSA and UL standards for use in the USA and Canada
NEW Solar Sensor 085 immersion type sensor included! •
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Item
VIEW ΔT
%
1
2
F
Input
Universal Sensor
Optional
Input
Universal Sensor
Included
Input
Solar Sensor
Included
Input
Demand
Signal
Input
24 V (ac)
Power Supply
Input
120 V (ac)
Power Supply
Black Red Blue Green
Output
On/Off
Pump
Output
Variable
Speed Pump
Ground