Details
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.
Inputs: (4) Pt1000 temperature sensors
Triac relays capacities: 1A / 115 V.
Standard relay capacity: 1A / 115 V.
Power supply: 100—240 V - 50/60 Hz.
Data interface: V-Bus.
ΔT adjustment range: 2—40ºF Δ.
Min. temperature differential 2ºF Δ.
Hysteresis: 2ºFΔ, ± 1ºF Δ.
Max. tank temperature range: 35—205°F.
Max. collector temperature range: 210—375°F.
Emergency shut down of the collector: 230—395°F.
Min. collector temperature range: 50—195ºF.
Antifreeze temperature option: 15—50°F.
kWh (BTU) calulation fl ow input: 0—5 gpm.