Brochure

96
10
A
DIFFERENTIAL TEMPERATURE CONTROLLERS
Code Description Pk Lbs USD
257220A iSolar™ 2, 1 relay 1 2.0 475.00
257240A iSolar™ 4, 2 relays 1 2.0 550.00
257260A iSolar™ Plus, 2 relays 1 2.0 725.00
257260A PV1 iSolar™ Plus, 2 relays, 12 V DC 1 2.0 725.00
257260A PV2 iSolar™ Plus, 2 relays, 24 V DC 1 2.0 725.00
Steel electrical mounting box with cover for
iSolar™ controllers.
UL listed
Code Description Pk Lbs USD
NA10120 1
5
/
8
" D x 8
5
/
8
" H x 4½" W 1 3.0 70.00
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
™ 257 series are multi—functional temperature differential con-
trollers 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 monitor-
ing 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 4 iSolar Plus iSolar BX
iSolar
MXLTE
Pre confi gured arrangements
1 1 10 26 20
Speed control triac output (30–100%)
11 2 3 4
Standard relay output
01 0 1 0
Dry contact relay
00 0 0 1
Sensor inputs (temperature)
44 4 5 8
Pt1000 temp. sensors included
33 4 4 5
Max. solar collector arrays
11 2 2 2
Max. solar storage tanks
11 2 2 4
Two tank priority logic
ttt
Second deltaT-function
ttt
Drainback pump speed control
t t t t t
Drainback booster pump
tt tt
Time controlled thermostat function
tt tt
Backup heat function
tt tt
Heat dump function
tt tt
Real time clock (timer function)
tt tt
Collector freeze protection
tt t t t
Evacuated tube collector function
tt t t t
Min. collector temperature
tt t t t
Collector cooling functions
tt t t t
Tank (night time) cooling
tt t t t
Emergency shutdown functions
tt t t t
Operating hours counter
tt t t t
Energy metering measurement
tt t t t
Vbus data communication tt t t t
Onboard data logging tt
Tested and Approved by TÜV Rheinland as an approved
U.S. Nationally Recognized Testing Laboratory (NRTL)
Exceeds or is equivalent to:
UL 60730-1A
CAN/CSA E60730-1
US
US
C
C
Code Description Pk Lbs USD
257208 Fuses 1 0.1 30.00
Replacement fuse T4A.
(priced per package of 10).
tech. broch. 01174
257
iSolar
™