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.
SolarFlex™ stainless steel piping with
EPDM insulation. Used to connect solar
collector with storage tank. Integrated
sensor cable saves time and reduces cost.
Packaged in a 50 foot continuous coil
ensures a leak-free installation.
Max. working pressure: 150 psi.
Max. fl uid temperature: 350ºF.
Min. surface temperature: -60ºF.
Min. bend radius: 5".
Flammability: Class VO.
Flame spread/smoke density: 25/50
Agency approvals: ASTM D 635
ASTM C 177
Includes fi tting kit.
SolarFlex™ stainless steel piping with
EPDM insulation. Used to connect solar
collector with storage tank. Integrated
sensor cable saves time and reduces cost.
Packaged in a 50 foot continuous coil
ensures a leak-free installation.
Max. working pressure: 150 psi.
Max. fl uid temperature: 350ºF.
Min. surface temperature: -60ºF.
Min. bend radius: 5".
Flammability: Class VO.
Flame spread/smoke density: 25/50
Agency approvals: ASTM D 635
ASTM C 177
Includes fi tting kit.
SolarFlex™ stainless steel piping with
EPDM insulation. Used to connect solar
collector with storage tank. Integrated
sensor cable saves time and reduces cost.
Packaged in a 50 foot continuous coil
ensures a leak-free installation.
Max. working pressure: 150 psi.
Max. fl uid temperature: 350ºF.
Min. surface temperature: -60ºF.
Min. bend radius: 5".
Flammability: Class VO.
Flame spread/smoke density: 25/50
Agency approvals: ASTM D 635
ASTM C 177
Includes fi tting kit.
SolarFlex™ stainless steel piping with
EPDM insulation. Used to connect solar
collector with storage tank. Integrated
sensor cable saves time and reduces cost.
Packaged in a 50 foot continuous coil
ensures a leak-free installation.
Max. working pressure: 150 psi.
Max. fl uid temperature: 350ºF.
Min. surface temperature: -60ºF.
Min. bend radius: 5".
Flammability: Class VO.
Flame spread/smoke density: 25/50
Agency approvals: ASTM D 635
ASTM C 177
Includes fi tting kit.
