13
Mode
Operation
SENSOR
Selects sensor type
SGUARD
Protects system from overheating and frost
START
Starts pump at pre-set insolation (solar radiation intensity)
ALARM
Enables/Disables protection functions
BTU
Energy
calculation and setting
ensor Selection –
USDT 2004 accepts different sensors types. User can
program a constant temperature instead of a sensor output also. The
sensor types are programmed at the factory for thermistor (KTY 10) types. The
PT 1000 sensor is recommended for high performance collectors such as
Thermomax systems and will not be damaged during collector stagnation. PT
1000 works fine in 482
o
F range and survives up to 572
o
F temperatures for a
short period of time. The KTY 10 tank sensor should be used in a conditioned
environment and will not be permanently damaged up to 360
o
F.
Selection:
S1
Sensor 1 (collector outlet) selection
S2
Sensor 2 (collector inlet) selection
S3
Sensor 3 (tank) selection
Designation:
PT
PT 1000 sensor (1000 O at 0
o
C)
KTY
Thermistor sensor (2000 O at 25
o
C)
250
250
o
F reference temperature
- 4
- 4
o
F reference temperature
S
