Brochure

98
10
A
DIFFERENTIAL TEMPERATURE CONTROLLERS
Steel electrical mounting box with cover for
iSolar™ controllers.
UL listed
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.
Data interface: V-Bus.
∆T adjustment range: 2—40ºF ∆.
Min. temperature differential 2ºF ∆.
Hysteresis: 2ºF∆, ± 1ºF∆.
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.
%TMBSHNM
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
ttt
Second delta T-function
ttt
Drain-back pump speed control
t t t t
Drain-back booster pump
ttt
Time controlled thermostat function
ttt
Backup heat function
ttt
Heat dump function
ttt
Real time clock (timer function)
ttt
Collector freeze protection
tt tt
Evacuated tube collector function
ttt
Min. collector temperature
tt tt
Collector cooling functions
tt tt
Tank (night time) cooling
tt tt
Emergency shutdown functions
tt tt
Pump operating hours counter
tt tt
Energy metering - fl ow calculated
t
Energy metering - fl ow meter input
ttt
Vbus data communication tt tt
Onboard data logging tt
US
US
C
C
Replacement fuse T4A.
(priced per package of 10).
tech. broch. 01174
257
iSolar
™
Code Description Lbs USD
257220A iSolar™ 2, 1 relay 2.0 522.50
257260A iSolar™ Plus, 2 relays 2.0 794.20
Code Description Lbs USD
257208 Fuses 0.1 32.90
Code Description Lbs USD
NA10120 1
5
/
8
" D x 8
5
/
8
" H x 4½" W 3.0 76.80