Automatic air vents are used in the closed circuits of solar heating systems. They allow air contained
in the fluid to be released automatically during the filling process, through a valve operated by a float
in contact with fluid in the system.
The shut-off valves are used in combination with the automatic air vents to isolate them after filling
the circuit of solar heating systems.
.These series of products have been specially made to work at high temperatures with a glycol medium.
Caleffi Series 257 iSolar BX Multi-functional Temperature Differential Controller
The 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.
Caleffi Series 257 iSolar Plus Multi-functional Temperature Differential Controller
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.
Caleffi Series 257 iSolar Multi-functional Temperature Differential Controller
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.
