Delta-T
Solar Control Unit
DLTA 001 000 120 Vac
DLTA 002 000 240 Vac
(Previously Model DTT-84)
Specifically designed to regulate the operation of a solar heating system, the Delta-T monitors collector & storage temperatures and automatically turns pumps on or off when the right temperature is reached. The controller can also provide additional functions, such as system freeze protection,
by recirculation and storage tank high-limit shut-off.
Product Function
Monitors collector and storage temperature
Turns a circulation pump or blower on or off at the
appropriate temperature differentials automatically.
Product Applications
Open and closed-loop solar water heating
Drain-back solar heating systems
For hard-wired installation to the power supply and pump
Product Features:
Six BIT switches for quick adaptation to more specifically match
the controlled system and collector environment
A DIP switch allows two precise settings for the ON/OFF
differentials of either 18°F/4°F or 9°/4°F
Note: Control does not include power cord or sensors. Must be purchased separately or as a package. Requires two SAS-10 (10,000 Ohm) thermistor temperature sensors.
Purchase single sensors separately
Purchase control with power cord
Purchase control with sensors
Purchase control with power cord and sensors
View » Owner's Manual [pdf format]
Installation and Operation Instructions
Operational Tests
Troubleshooting Guide
Product Warranty:
Limited one year warranty and limited subsequent nine year warranty. Delta-T warranty information [pdf format]
Product Manufacturer: Heliotrope Thermal
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HELP » Contact Customer Support
Toll-Free help line offering product info and ordering support
Online e-mail technical and installation support
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A complete typical solar domestic water heating system components and layout is shown below.
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Delivery Information: Please allow 7 to 14 business days for
orders to be processed, plus standard transportation delivery time.
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