Siemens RVS41.813 - Readj Hp Return Sensor; Readj Status

Line no. Operating line
3030 Auto readj HP cond sensor
3031 Readj HP flow sensor
3032 Readj HP return sensor
3033 Readj status
The automatic correction is achieved by using the same values to control and calculate the
yearly performance factor at the same temperature for the flow and return sensor. A
calibration using absolute temperatures is not done.
A
utomatic
Both sensor el
ements must be brought to the same temperature prior to the automatic
correction.
A
uto readj HP cond sensor
"now"
The setting "
now" triggers automatic sensor correction. During calibration, the
"
Readjustment HP flow sensor" is set based on measured temperature difference between
flow and return sensor.
T
readjB21
= T
readjB71
+ (T
B71
- T
B21
)
Both sensor v
alues must be with a range of 5°C and 50°C to calibrate and may not
exceed a difference of max. 3°C.
A
uto readj HP cond sensor
"After pump prerun"
The condenser pump Q9 is first s
witched on for eight minutes and then the calibration
is conducted if "
After pump prerun" is selected.
The controller automatically activates the function "Relay test Q9" to switch on the
condenser pump. As a result, the key symbol and special operating mode "output test"
is displayed during this period. The prerun time cannot be adjusted.
The readjustment can be forced immediately and at any time during the pump prerun
by selecting "
now". "Off" aborts prerun without readjustment.
The automatic readjustment of return sensor B71 must be calibrated manually if you want a
calibration of absolute temperatures. The readjustment value of the return sensor is not
changed for automatic readjustment.
Readjustment HP
flow sensor
Readjustment HP return sensor
Temperatures measured wit
h sensors B21 and B71 can be each be readjustment
manually using a separate parameter (Par 3031 for flow and Par 3032 for return) by a
max. ±20°K.
The menu
Input / output test displays the measured sensor values without
readjustment. The readjusted temperature values used for control are displayed in the
menu
Diagnostics heat generation.
138/258
Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009