Product Overview

96
10
A
DIFFERENTIAL TEMPERATURE CONTROLLERS
Code Description Lbs USD
257220A iSolar™ 2, 1 relay 2.0 500.00
257260A iSolar™ Plus, 2 relays 2.0 760.00
257260A PV1 iSolar™ Plus, 2 relays, 12 V DC 2.0 760.00
257260A PV2 iSolar™ Plus, 2 relays, 24 V DC 2.0 760.00
Steel electrical mounting box with cover for
iSolar™ controllers.
UL listed
Code Description Lbs USD
NA10120 1
5
/
8
" D x 8
5
/
8
" H x 4½" W 3.0 73.50
NA101
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 / 100—240 V AC.
Standard relay capacity: 1A / 100—240 V AC.
Power supply: 100—240 V AC- 50/60 Hz.
Power supply: PV1 -12 V DC, PV2 - 24V DC
Data interface: V-Bus.
ΔT adjustment range: 2—40ºF Δ.
Min. temperature differential 2ºF Δ.
Hysteresis: 2ºFΔ, ± 1ºFΔ.
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) calculation fl ow input: 0—5 gpm.
The iSolar™ 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.
Function
Model Comparison
iSolar 2 iSolar Plus iSolar BX
iSolar
MX-LTE
Pre confi gured arrangements
110 2620
Speed control triac output (30–100%)
12 34
Standard relay output
00 10
Dry contact relay
00 01
Sensor inputs (temperature)
44 58
Pt-1000 temp. sensors included
34 45
Max. solar collector arrays
12 22
Max. solar storage tanks
12 24
Two tank priority logic
• • •
Second delta T-function
•••
Drain-back pump speed control
• • • •
Drain-back booster pump
•••
Time controlled thermostat function
•••
Backup heat function
•••
Heat dump function
•••
Real time clock (timer function)
•••
Collector freeze protection
•• ••
Evacuated tube collector function
•••
Min. collector temperature
•• ••
Collector cooling functions
•• ••
Tank (night time) cooling
•• ••
Emergency shutdown functions
•• ••
Pump operating hours counter
•• ••
Energy metering - fl ow calculated
•
Energy metering - fl ow meter input
•••
Vbus data communication • • • •
Onboard data logging • •
US
US
C
C
Code Description Lbs USD
257208 Fuses 0.1 31.50
Replacement fuse T4A.
(priced per package of 10).
tech. broch. 01174
257
iSolar
™
Do not directly connect iSolar
TM
Plus PV1, 12 volt or iSolar
TM
Plus PV2, 24 volt, to DC solar
photovoltaic panel or any other
power source that exceeds
15% over voltage. If the power
supply voltage is 15% greater
Battery
or
Voltage
Limiter
Note
than the rated input voltage of the controller, it can lead to damage or
destruction of the product.