Solar Thermal
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Caleffi Series NA121 Connection Kits for SolarFlex
SolarFlex Extra Connection KitsCaleffi Series NA121 Connection Kits for SolarFlex$16.11 -
Caleffi Series 101 Sweat Adapter 1" Sweat to 1" SolarFlex 1 1/4" Union Thread
Sweat to SolarFlex AdapterCaleffi Series 101 Sweat Adapter 1" Sweat to 1 1/4" Union Thread$15.14 -
Caleffi Series 101 Sweat Adapter 3/4" Sweat to 1/2" SolarFlex 3/4" Male Thread
Sweat To SolarFlex AdaptorCaleffi Series 101 Sweat Adapter 3/4" Sweat to 3/4" Male Thread$11.02 -
Caleffi Series 257 iSolar BX Multi-functional Temperature Differential Controller
Caleffi Series 257 iSolar BX Multi-functional Temperature Differential ControllerThe iSolar™ BX is a multi-functional temperature differential controller with add-on system functions for use in a wide variety of solar thermal heating applications. iSolar™ BX is equipped with four relay outputs; three triac pump speed control relays and one standard relay. These outputs include two pulse width modulation (PWM) outputs that enable energy conservation measures for high-effi ciency direct current (DC) pumps. The controller is equipped with fi ve Pt1000 sensor inputs, two analog Grundfos sensor inputs, and one impulse fl ow meter input. Twenty six system confi guration options are predefi ned for control of a standard solar water heating system, drainback systems, supplemental space heating, multiple storage tanks, heat dump and storage tank booster heating.$314.86 -
Caleffi Series 257 iSolar Plus Multi-functional Temperature Differential Controller
Caleffi Series 257 iSolar Plus Multi-functional Temperature Differential ControllerThe 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.$285.34 -
Caleffi Series 257 iSolar Multi-functional Temperature Differential Controller
Caleffi Series 257 iSolar Multi-functional Temperature Differential ControllerThe 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.$186.94 -
Caleffi Series 257 ISolar Interface Adapter
Caleffi Series 257 Interface AdapterThe 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.$236.14 -
Caleffi Series 253 Saftey Solar Release Valve
Caleffi Series 253 Saftey Solar Release ValveSafety 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.$29.41 -
Caleffi Series 2521 Adjustable Thermostatic Three Way Mixing Valve
Caleffi Series 2521 Adjustable Thermostatic Three Way Mixing ValveAdjustable 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.$99.89 -
Caleffi Series 251 Discal High Capacity Auto Air Vent 1/2" NPT Female
Caleffi Series 251 Discal High Capacity Auto Air Vent 1/2" NPT FemaleHigh-performance automatic air vent for solar heating systems. Working temperature range: -20—320ºF. Max. working pressure: 150 psi. Max. discharge pressure: 150 psi$55.10