sensoR PURPose
2.3.3. Collector Sensor T1
Supplied with HPAK, HCOM, and HFLO systems
TYPE: 10k
Ω
Thermistor
USE: REQUIRED
FUNCTIONS:
•
‘Hot’ differential operation
•
‘Hot’ energy calculation
•
Freeze monitoring sensor for open loop
•
Low temperature monitor for vacation mode
•
Useful collector temperature monitor
•
Drain back system high limit monitor
WARNINgS:
•
Insulate from ambient temperatures
•
Never install inside collector
•
Install on collector outlet header only
2.3.4. Low tank Sensor t2
Supplied with HPAK, HCOM, and HFLO systems
TYPE: 10k
Ω
Thermistor
USE: REQUIRED
FUNCTIONS:
•
‘Cold’ differential operation
•
Tank high limit monitor
•
Low temperature monitor for vacation mode
•
Single Tank gas function monitor average w/T3
•
Relay 2 space heating setpoint
•
Relay 3 operation setpoint
WARNINgS:
•
Isolate from ambient
•
Ensure contact with tank wall
2.3.5. High tank Sensor t3
Supplied with HCOM systems
TYPE: 10k
Ω
Thermistor
USE: OPTIONAL
FUNCTIONS:
•
‘Cold’ differential operation average with T2
•
Tank high limit monitor average with T2
•
Low temperature monitor for vacation mode
average with T2
•
Single Tank gas function monitor average with T2
•
Relay 2 space heating setpoint in place of T2
•
Relay 3 operation setpoint in place of T2
WARNINgS:
•
Isolate from ambient
•
Ensure contact with tank wall
•
To use average, use checkbox in Settings
2.3.6. t4
Supplied with HCOM systems
TYPE: 10k
Ω
Thermistor
USE:
OPTIONAL / REQUIRED - HCOM
FUNCTIONS:
•
Use for energy calculation sensor
•
Use for simple differential operations
•
HCOM - Water side HX inlet (Cold)
WARNINgS:
•
Isolate from ambient
•
Ensure contact with measuring surface or
use immersion sensor
2.3.7. T5
Supplied with HCOM systems
TYPE: 10k
Ω
Thermistor
USE:
OPTIONAL / REQUIRED - HCOM
FUNCTIONS:
•
Use for energy calculation / simple differential
•
Outdoor reset in space heating mode
WARNINgS:
•
Keep out of direct sunlight
2.3.9. Grundfos RPS and T7
Supplied with HCOM systems
TYPE: Relative Pressure Sensor / 2 x 5VDC Analog Sensing
USE: OPTIONAL
FUNCTIONS:
•
Solar system pressure monitoring
•
Insolation monitoring with compatible pyranometer
•
Electricity monitoring with compatible current transformer
2.3.8. Grundfos VFS and T6
Supplied with Pro Series and HCOM
TYPE: Vortex Flow Sensor
USE:
OPTIONAL / REQUIRED - HCOM
INFO: Can be moved to measure flow anywhere in the solar
system and calculate energy at that point, select sensors
for cold and hot measurement in Settings
FUNCTIONS:
•
Monitor flow rate for energy calculation
•
‘Cold’ energy calculation
WARNINgS:
•
Ensure correct VFS range is set in settings
FIg. 2.3.3
T
T
P
M
T1
T7
T2
T3
T4
T5
RPs
vfs
T6
