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ADI CD boiler - Technical Manual
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18.3 The boiler control unit and operating cycle
The control unit regulates:
The boiler operating cycle.
The boiler safeties (by indicating also the possible reasons for the boiler lockout).
The boiler power modulation.
Short description of the boiler operating cycle:
LEGEND of the operating phases:
Display Meaning
00
Boiler in stand-by (the installation is not receiving any request of heat)
01
The boiler stops due to lack of gas pressure (minimum gas pressure switch)
02
Motor fan is activated (revolutions increase)
03
Start of the pre-venting phase
04
Time out (control of the fan speed)
05
Time of pre-ignition
06
Safety time of ignition and ionization control (constant)
07
Safety time of ignition and ionization control (variable)
10
Operation in the heating mode
11
Not available phase: D.H.W.S. operation
(according to the installation and to the boiler configuration)
12
Not available phase: Heating and D.H.W. operating in parallel
(according to the installation and to the boiler configuration)
20 / 21
Post air-venting and fan stop
22
Self-test and return to the initial position
99
Alarm / lockout (alarm code visualized on the display)
Summary of Contents for ADI CD 375
Page 1: ...1 º º ADI CD CONDENSING BOILER TECHNICAL MANUAL OF INSTALLATION USE AND MAINTENANCE V 07 2017 ...
Page 7: ...ADI CD boiler Technical Manual 7 Models ADI CD 200 and higher A C D B J H G F E R S ...
Page 34: ...ADI CD boiler Technical Manual 34 12 1 Electric drawing ADI CD 70 750 ...
Page 35: ...ADI CD boiler Technical Manual 35 12 2 Electric drawing ADI CD 850 950 ...