Solar Thermal

The iSolar™ 257 series are multi—functional temperature differential controllers that provide complete control of the solar thermal system for safe and long—lasting operation. The microprocessor based controller monitors and controls thermal solar systems by means of a collector sensor and a storage tank sensor. The controllers also perform important system monitoring and safety functions. The system parameters and measured values can be changed and viewed on the large LCD display. The controller is equipped for up to four temperature sensor inputs and one or two 120 VAC outputs (some models) for activating the solar circuit pump and second 120 VAC output for activating a valve or second pump. The controller is additionally equipped with VBus® for two-way communication between modules, PC’s or data loggers.

The iSolar™ 257 series are multi—functional temperature differential controllers that provide complete control of the solar thermal system for safe and long—lasting operation. The microprocessor based controller monitors and controls thermal solar systems by means of a collector sensor and a storage tank sensor. The controllers also perform important system monitoring and safety functions. The system parameters and measured values can be changed and viewed on the large LCD display. The controller is equipped for up to four temperature sensor inputs and one or two 120 VAC outputs (some models) for activating the solar circuit pump and second 120 VAC output for activating a valve or second pump. The controller is additionally equipped with VBus® for two-way communication between modules, PC’s or data loggers.

The interface adapter RS-COM enables the connection of a PC to iSolar Plus controller with V Bus. Service Center Software allows the measured data to be recorded numerically in a log-data file. The adapter does not need an external power supply. Includes RS232 cable.

Safety relief valves for solar systems. Working temperature range: -20—360ºF. Normal pressure: 150 psi. Opening over pressure: 10%. Closing differential: 20%. Discharge capacity: 171,000 BTU. Connections: Inlet, ½" female. Discharge, ¾" female.

Adjustable thermostatic three-way mixing valve for solar systems with built-in inlet check valves. Setting range: 80—150ºF. Max. working pressure (static) 150 psi. Max. working pressure (dynamic) 75 psi. Min. working pressure (dynamic) 30 psi. Max. inlet temperature: 210ºF. Connection: ½", ¾", 1" sweat. ASSE 1017 Listed. Lead Plumbing Law Compliance: (0.25% Max. weighted average lead content). Lead Plumbing Law Certifi ed by IAPMO R&T.

High-performance automatic air vent for solar heating systems. Working temperature range: -20—320ºF. Max. working pressure: 150 psi. Max. discharge pressure: 150 psi

Air separator for solar heating systems. Working temperature range: -20—320ºF. Max. working pressure: 150 psi. Max. discharge pressure: 150 psi. Connections: Main, ¾" NPT, female Drain, ½" NPT, female

Caleffi Flex "C" Clip Segment Ring for SolarFlex Pipe

Double Nipple for 1/2" SolarFlex Pipe with 3/4" Male Thread