7
INITIAL ACTIVATION AND MAINTENANCE
Installation, user and maintenance manual – AY Condensing line, AY Series
53
Table 7�1 – Gas nozzles and content of CO2
Gas type
G20
G25
G25�1
G27
G2�350
G30
LPG
G31
Nozzle code
-
176
179
178
178
-
177
177
177
Nozzle diameter
mm
6.20
7,30
7,60
7,60
-
4.45
4.45
4.45
Parameter value "45"
-
0
0
0
0
0
1
1
0
CO2 content
%
9.4
9.4
10,7
9,35
9,15
12,4
11.4
10.6
Delta CO2 between Max and Min potential
%
0,5
0,5
0,5
0,45
0.35
0,9
0,9
0,4
In the first start-up stage, on the display of the controller of the appliance (and/or on the display of the DDC, if connected),
an operating code might be visualized. If the operating code is generated by the controller of the appliance, see the list of
codes in Table 9.1
→
59; if the operating code is generated by the DDC, see the list of codes given in the "installation techni-
cian manual - manual 1" of the DDC (supplied with the unit).
Successful first start-up ONLY certifies the correct operation of the appliance (and of the DDC, if connected). It does NOT
certify that the plant complies with current regulations.
OPERATIONS IN MENU 2
▶
FORCING TO MINIMUM POWER (ACTION "23"):
You will need: the display showing "2.20" (see point "3" of procedure "HOW TO ACCESS THE MENUS" - Paragraph "4.3
→
15").
1.
Turn the knob clockwise until the display shows parameter "2.23".
2.
Press the knob to display the flashing force to minimum power request: "P_L1".
3.
Press the knob again to execute the forcing. The request stops flashing, and the display shows “2.23” again. The forcing opera-
tion has been performed.
4.
To exit the menu, turn the knob clockwise until “2.E” displays, and press it to return to the menu selection: "2.".
5.
To exit the menu selection, turn the knob clockwise until “E” displays, and press it to exit.
▶
FORCING TO MAXIMUM POWER (ACTION "24"):
You will need: the display showing "2.20" (see point "3" of procedure "HOW TO ACCESS THE MENUS" - Paragraph "4.3
→
15").
1.
Turn the knob clockwise until the display shows parameter: "2.24".
2.
Press the knob to display the flashing force to minimum power request: " P_H1".
3.
Press the knob again to execute the forcing. The request stops flashing, and the display shows "2.24" again. The forcing opera-
tion has been performed.
4.
To exit the menu, turn the knob clockwise until “2.E” displays, and press it to return to the menu selection: "2.".
5.
To exit the menu selection, turn the knob clockwise until “E” displays, and press it to exit.
▶
CANCELLING POWER FORCING (ACTION "25"):
You will need: the display showing "2.20" (see point "3" of procedure "HOW TO ACCESS THE MENUS" - Paragraph "4.3
→
15").
1.
Turn the knob clockwise until the display shows parameter: "2.25".
2.
Press the knob to display the flashing cancel forcing request: "UnF1".
3.
Press the knob again to execute the cancel operation. The request stops flashing, and the display shows "2.25" again. The can-
cel operation has been performed.
4.
To exit the menu, turn the knob clockwise until “2.E” displays, and press it to return to the menu selection: "2.".
5.
To exit the menu selection, turn the knob clockwise until “E” displays, and press it to exit.
Step 3: regulation of plant operating parameters
Regulation of operating parameters of the plant occurs via the controller (see Paragraph 5.9
→
29) or via the DDC (if connected).
In this phase it may be necessary to check the settings of parameters "156", "180" and "182", which are closely linked to the
system requirements (see instructions "SPECIAL PARAMETER SETTINGS" in Paragraph 5.9
→
29).
If the appliance is connected to a Direct Digital Controller (DDC), for operations regarding the regulation of plant operating
parameters according to the user's requirements, refer to the DDC’s manual (final user manual - manual 2) supplied with the
unit.
7�2
MAINTENANCE
Correct maintenance prevents problems, guarantees maximum operating efficiency of the appliance and allows running costs to be
contained.
The maintenance operations described in this paragraph must be performed exclusively by the serviceman in charge of the
plant or by an authorized CAT Robur.
