Parts Catalog > Subcategory Search > Controls For Solar Thermal Systems

CD-0015   Solar differential thermostat for solar domestic hot water systems. No sensors included. Hard wire to pump and 120/240 Volt AC line. This will also directly replace the Heliotrope General DTT-84.   By Goldline

CD-0016   Solar differential thermostat for solar domestic hot water systems. Includes line cord and outlet for 120 Volt plug in operation. This will also directly replace the Heliotrope General DTT-94.   By Goldline

CD-0018   Solar differential thermostat for solar domestic hot water systems. Includes two sensors. Hard wire to pump and line for 120/240 Volt AC systems. This will also directly replace the Heliotrope General DTT-84.   By Goldline

CD-0019   Solar differential thermostat for solar domestic hot water systems. Includes two sensors. Includes line cord and and outlet for 110 Volt plug in operation. This will also directly replace the Heliotrope General DTT-94.   By Goldline

CD-0030   Solar differential thermostat for solar domestic hot water systems. Requires two 10K temperature sensors. For use as a stand alone control or as a replacement for the Heliodyne HPAK standard control. Comes with line cord and pump cable.   By Heliodyne   Special Order Item - Contact For Price & Availability

CD-0035   Heliodyne DTT-84 120V solar differential controller. Hardwire connections for AC and Pump output. Requires 2 10k temperature sensors. PC board is a direct replacement for early model Heliotrope General DTT-84 controls and will fit existing boxes.   By Heliodyne

CD-0041   Steca model TR-A501T-U differential temperature control with digital temperature display, programmable functions for solar thermal systems. Hard wire, 110 or 220 volt input. Allows for five inputs and will control one output. Two probe sensors included. Allows for flow meter input and displays BTU produced by system and hours of operation.   By Steca   DISCONTINUED - No Longer Available

CD-0042   Steca model TR-A502TT-U differential temperature control with digital temperature display, programmable functions for solar thermal systems. Hard wire, 110 or 220 volt input. Allows for five inputs and will control two outputs. Three probe sensors included. Allows for flow meter input and displays BTU produced by system and hours of operation.   By Steca   DISCONTINUED - No Longer Available

CD-0043   Steca model TR-A503TTR-U differential temperature control with digital temperature display, programmable functions for solar thermal systems. Hard wire, 110 or 220 volt input. Allows for five inputs and will control three outputs. Three probe sensors included. Allows for flow meter input and displays BTU produced by system and hours of operation. Has slot for mini SD memory card and will interface with Steca router for instantaneous remote monitoring. One mini SD memory card is supplied and installed in the control.   By Steca   DISCONTINUED - No Longer Available