Unigas G258A, Manual Of Installation - Use - Maintenance

Page: 198 / 217

5
PID parameters set and modifications (PArA):
Push Enter button, on the green display Opr appears; using the down arrow, scroll until group PArA is reached and push Enter .
On the green display Pb1 e appears and on the red one the set parameter. Push is sequence the down or up arrow the menu is scrolled.
Push Enter to select and the arrows to choose the desired value. Enter to confirm
(*) Parameters affected by setting of decimal place ( ConF > dISP parameter dECP )
Parameter Display Range
Factory
setting
Remarks
Proportional band
Pb1 1… 9999 digit 10
Typical value for temperature
erivative action
dt 0… 9999 sec. 80
Typical value for temperature
Integral action
rt 0… 9999 sec. 350
Typical value for temperature
Т
Dead band (*)
db 0… 999,9 digit 1
Typical value
Servocontrol
running time
tt 10… 3000 sec. 15
Set servocontrol running time
Switch-on differential (*)
HYS1 0,0… -1999 digit -5
Value under setpoint below which
the burner switches back on
(1N-1P closes)
Switch-off differential 2° stage
(*)
HYS2 0,0 … HYS3 3
(enable only with parameter bin1 = 4)
Upper switch-off
differential
(*)
HYS3 0,0… 9999 digit 5
Value over setpoint above which the burner
switches off (1N-1P opens)
Switch-on differential on cooling
controller (*)
HYS4 0,0… 9999 digit 5
Do not used
(enable only with parameter CACt = 0)
Switch-off differential 2° stage
on cooling controller (*)
HYS5 HYS6…0,0 digit 5
Do not used
(enable only with parameter CACt = 0 and parame-
ter bin1 =0)
Upper switch-off
differential on cooling controller
(*)
HYS6 0,0… -1999 digit 5
Do not used
(enable only with parameter CACt = 0)
Delay modulation
q 0,0… 999,9 digit 0
Do not alter
T Outside temperature Curve
point 1 (*)
At1 -40 ...120 digit -10
First point of external temperature for climatic curve
Boiler temperature Curve point 1
(*)
Ht1 SPL...SPH 60
Set-point temperature for the external temperature
1
TT Outside temperature Curve
point 2 (*)
At2 -40 ...120 digit 20
Second point of external temperature for climatic
curve
Boiler temperature Curve point 2
(*)
Ht2 SPL...SPH 50
Set-point temperature for the external temperature
2