Raypak B0520 Installation And Operating Instructions Manual page 32

To adjust the Differential (HyS1 and HyS3)
To adjust the differential it is necessary to enter the programming mode (refer to 'To adjust
parameters' below).
To adjust parameters
1. Press the 'PGM' button for 2 seconds, the display will show 'AL'
2. Press the 'PGM' button again for 2 seconds. Display shows 'C111' and the current setting for
C111 (9000).
3. Press the ▲ button to change the value of the right hand digit.
4. Press the ▼ button to select the next digit position from right to left.
5. Press the ▲ button to change the value of the selected digit.
6. Press and release the "PGM" button to select the next parameter.
Repeat steps 3 - 6 until all parameters are set correctly. (Refer to the RWF40 PARAMETER TABLE
below)
When all parameters are set correctly press the 'EXIT' button to exit programming mode.
Fault Codes
In the event a fault occurs with the temperature sensor a code will be displayed on the thermostat.
Code
Upper window (red)
1999 (flashing)
1999 (flashing)
RWF40 Parameter Table
Parameter
C111
C112
C113
SCL
SCH
SCL2
SCH2
SPL
SPH
OFF 1
ADJUSTMENT
Lower window (green)
Current set point
tA
Setting Parameter
9000 OFF 2
0000 OFF 3
0000 DF
0 AL
100 HySt
0 Pb. 1
0 dt
0 rt
95 db
0 tt
Water temperature sensor open or short circuited
Outdoor compensation sensor open or short circuited
Setting
0
0
1
0
0
20
15
60
3
30
32
Fault
Parameter Setting
HyS1
HyS2
HyS3
q
H
P
SP1
SP2
Dsp
-3
0
4
0
0
0
78
0
0