11
40180036GB
5.2. Time Sequence Diagram (Modulating)
Required input signals to control unit
Control signals
Permissible input signals to control unit
A
Control loop
Q
Servomotor
B
Fan motor
D
Differential air pressure switch
IN
Increase function
CC Electronic capacity controller
DE
Decrease function
E
Thermostat/pressurestat and/or
switch-off threshold of capacity controller
PL
Fan pressure, air 0,4 - 100 mbar
F
Increase/decrease functions in cap. controller PF
Comb. chamber pressure -2…+5 mbar
G
Ignition transformer
PBr
Burner pressure, gas 0,5 - 100 mbar
H
Main gas valve, NC
V
Gas/air ratio control
L
Gas/air ratio controller
(PBr:PL) 0,75:1…3:1
M
Gas valve, NC
N
Zero point corr/- 1 mbar
P
Flame signal
O
Air damper
W
Sequence switch stopped (LFL)
Adjustable switching points on the cam switches of the servomotor
I
= switching point of full load
II
= switching point of ”closed” position
III
= switching point of ignition load/partial load at the low limit of the modulating area (
I
-
III
)
Summary of Contents for GP-6.10 P
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