Kovarson ADAX 25, ADAX Series, ADAX 20, ADAX 30, ADAX 35 Installation And Servicing Instructions
Code
Condensing wall mounted boiler
ADAX
INSTALLATION AND SERVICING INSTRUCTIONS
EN
6322893 - 02/2015 - R0
SAFETY WARNINGS AND REGULATIONS
RESTRICTIONS
m
WARNINGS
– After having removed the packaging make sure that
the product supplied is integral and complete in all
its parts. If this is not the case, please contact the
Dealer who sold the appliance.
– The appliance must be used as intended by
KOVARSON
caused to persons, animals or things, improper
installation, adjustment, maintenance and improper
use of the appliance.
– In the event of water leaks, disconnect the appliance
from the mains power supply, close the water
mains and promptly inform professionally qualified
personnel.
– Periodically check that the operating pressure of
the water heating system when cold is
this is not the case, increase the pressure or contact
professionally qualified personnel.
– If the appliance is not used for a long period of time,
at least one of the following operations must be
carried out:
set the main system switch to "OFF";
-
-
close the gas and water valves for the water
heating system.
– In order to ensure optimal appliance operations
KOVARSON
checks are carried out
who is not responsible for any damage
1-1.2 bar
recommends that maintenance and
ONCE A YEAR
.
. If
d
IT IS FORBIDDEN
– The appliance is not to be used by children or
unassisted disabled persons.
– Do not use electrical devices or appliances such as
switches, electrical appliances etc if you can smell
fuel. If this should happen:
open the doors and windows to air the room;
-
-
close the gas isolation device;
-
promptly call for professional assistance.
– Do not touch the appliance with bare feet or with any
wet part of the body.
– Do not carry out any technical intervention or
cleaning operation before having disconnected the
appliance from the mains power by setting the main
switch to "OFF", and closing the gas supply.
– Do not modify the safety or adjustment devices
without authorization and instructions from the
manufacturer.
– Do not block the condensate drain (if present).
– Do not pull, detach or twist the electrical cables
coming out of the appliance even if the appliance is
disconnected from the mains power supply.
– Do not expose the boiler to atmospheric agents.
These boilers can also be installed in partially
covered areas, as per EN 15502, with a maximum
ambient temperature of 60°C and a minimum
ambient temperature of - 5°C. It is recommended
that the boiler is installed below weathered roofs,
on the balcony or in a protected niche, to protect it
from exposure to weathering agents (rain, hail and
snow). The boiler is equipped as standard with an
antifreeze function.
– Do not block or reduce the size of the ventilation
openings of the room where the appliance is
installed, if present.
– Remove the mains power and gas supply from the
appliance if the external temperature could fall
below ZERO (risk of freezing).
– Do not leave containers with flammable substances
in the room where the appliance is installed.
– Do not leave packaging material around since it
could be dangerous. Therefore dispose of it as
prescribed by legislation in force.
m
2
WARNINGS
–
It is recommended that all operators
carefully in order to use the appliance in a safe and
rational manner.
This manual
–
must therefore be kept for future reference and
must always accompany the appliance in the event
the appliance is transferred or sold to another
Owner or User or is installed on another system.
Installation and maintenance
–
must be carried out by a qualified company or by
a professionally qualified technician in accordance
with the instructions contained in the manual. The
company or technician will, at the end of installation
operations, issue a statement of compliance
with national and local Technical Standards and
Legislation in force
is an integral part of the appliance. It
read this manual
of this appliance
RANGE
1312
CONTENTS
MODEL CODE
ADAX 20 - (G20) 8114280
ADAX 25 - (G20) 8114282
ADAX 30 - (G20) 8114284
ADAX 35 - (G20) 8114286
CONFORMITY
ADAX
boilers comply with:
– Directive 2009/142/EC - Gas Appliances
– Boiler Efficiency Directive 92/42/EEC
– Low Voltage Directive 2006/95/EC
– Electromagnetic Compatibility Directive 2004/108/EC
– Thermal Efficiency
– Classified as "Condensing"
– Class NOx 5 (< 70 mg/kWh)
Please refer to the technical data plate for the serial number
and year of manufacture.
EC DECLARATION OF CONFORMITY
In accordance with "Gas Appliances" Directive 2009/142/EC,
"Electromagnetic Compatibility" Directive 2004/108/EC, "Boiler
Efficiency" Directive 92/42/EC and "Low Voltage" Directive
2006/95/EC, the manufacturer KOVARSON s.r.o., via Garbo 27,
37045 Legnago (VR),
comply with the European Directives.
The Technical Manager
(Franco Macchi)
DECLARES THAT
the boiler models
ADAX
SYMBOLS
a
f
d
m
DANGER
To indicate actions which, if not carried out correctly,
can result in injury of a general nature or may damage
or cause the appliance to malfunction; these actions
therefore require particular caution and adequate
preparation.
DANGER
To indicate actions which, if not carried out correctly,
could lead to injury of an electrical nature; these
actions therefore require particular caution and
adequate preparation.
IT IS FORBIDDEN
To indicate actions which MUST NOT BE carried out.
CAUTION
To indicate particularly important and useful
information.
1 DESCRIPTION OF THE APPLIANCE 4
1.1 Characteristics .................................4
1.2 Check and safety devices .........................4
1.3 Identification ...................................4
1.3.1 Data label ............................ 5
1.4 Structure ......................................6
1.5 Technical features ...............................7
1.6 Main water circuit ...............................8
1.7 Sensors........................................8
1.8 Expansion tank .................................9
1.9 Circulation pump ................................9
1.9.1 Pump equipped with LED................ 9
1.10 Control panel ..................................10
1.11 Wiring diagram ................................11
2 INSTALLATION 12
2.1 Unpacking the product ..........................12
2.2 Dimensions and weight..........................12
2.3 Handling......................................12
2.4 Installation room ...............................12
2.5 New installation or installation of a replacement
appliance .....................................13
2.6 Cleaning the system ............................13
2.7 Water system treatment.........................13
2.8 Boiler installation ..............................13
2.9 Hydraulic connections...........................14
2.9.1 Plumbing accessories (optional) ......... 14
2.10 Condensate outlet/collection .....................14
2.11 Gas supply ....................................14
2.12 Smoke outlet and combustion air inlet .............15
2.12.1 Coaxial duct (Ø 60/100mm and Ø 80/125mm) 16
2.12.2 Separate ducts (Ø 60mm and Ø 80mm) ... 16
2.13 Electrical connections...........................17
2.13.1 Outdoor sensor ....................... 19
2.13.2 Chrono-thermostat or Air Thermostat .... 19
2.13.3 EXAMPLE of use of the command/control
2.14 Refilling or emptying............................20
3 PUTTING INTO SERVICE 21
3.1 Preliminary operations ..........................21
3.2 Before commissioning ..........................21
3.3 Parameter setting and display ....................22
3.4 List of parameters..............................22
3.5 Fault / malfunction codes........................23
3.6 Display of operating data and counters.............24
3.7 Checks .......................................25
3.8 Domestic hot water comfort function (preheating) ...26
3.9 Gas conversion.................................26
4 MAINTENANCE 27
4.1 Adjustments...................................27
4.2 External cleaning...............................27
4.3 Cleaning the inside of the appliance ...............27
4.4 Checks .......................................28
4.5 Unscheduled maintenance .......................29
4.6 Troubleshooting................................29
4.7 Any pump faults and possible solutions ............30
device on some types of heating systems.. 19
2.14.1 REFILL operations .................... 20
2.14.2 EMPTYING operations ................. 20
3.2.1 Self-calibrating procedure .............. 21
3.7.1 Chimney sweep function ............... 25
4.2.1 Cleaning the cladding.................. 27
4.3.1 Removing components................. 27
4.3.2 Cleaning the burner and the combustion
chamber ............................ 28
4.3.3 Checking the ignition/detection electrode . 28
4.3.4 Final operations ...................... 28
4.4.1 Checking the smoke duct............... 28
4.4.2 Checking the expansion vessel pressure .. 28
3
1 DESCRIPTION OF THE APPLIANCE
Cod. 6244745
1.1 Characteristics
ADAX
are last generation condensing wall mounted boilers
KOVARSON
which
water production. The main design choices made by
ADAX
for the
– the total pre-mix microflame burner combined with a steel
heat exchanger for heating and a rapid heat exchanger for
DHW
– the sealed combustion chamber which can be classified
"Type C" or "Type B" in relation to the room where the boiler
is installed, depending on the smoke outlet configuration
adopted during installation
– the command and control microprocessor electronic board
provides efficient management of both heating and hot water
production. It can also be connected to a remote control
with an Open Therm protocol or to room thermostat and/or
external sensor. If connected to an external sensor, the boiler
temperature varies on the basis of the external temperature
according to a selected optimal climatic curve providing
significant energy and economic savings.
Other special features of the
– the anti-freeze function which activates automatically if the
temperature of the water inside the boiler falls below the
threshold of the value set at parameter "PAR 10" and , if there
is an external sensor, if the external temperature falls below
the threshold of the value set at parameter "PAR 11"
– the anti-blocking function of the pump and diverter valve. This
activates automatically every 24 hours if no request for heat
has been made
– the chimney sweep function lasts 15 minutes and makes the
job of the qualified technician easier when measuring the
parameters and combustion efficiency
– domestic hot water comfort function which allows the time
necessary for the hot water to become available to be reduced
and ensures that the temperature is stable
– screen display of the operating and self-diagnostic
parameters with error code display when the fault occurs.
This makes repair interventions easier and allows appliance
operation to be restored correctly.
has produced for heating and domestic hot
boilers are:
ADAX
boilers are:
KOVARSON
1.3 Identification
The
ADAX
boilers can be identified by means of:
1 Packaging label:
packaging and provides a code, the serial number of the
boiler and the bar code
2 Energy Efficiency Label:
of the packaging to notify the User of the level of energy
savings and reduced environmental pollution produced by
the appliance
3 Data plate:
boiler and provides the technical specification, appliance
performance and any other information required by law.
1
2
I II
++
A
A
+
A
B
A
C
B
D
C
D
E
E
F
F
G
G
kW
dB
2015 811/2013
3
this is located on the outside of the
this is positioned on the outside
this is located inside the front panel of the
1
2
1.2 Check and safety devices
The
ADAX
boilers are equipped with the following check and
safety devices:
– thermal safety thermostat 100°C
– 3 bar relief valve
– heating water pressure transducer
– delivery sensor
– DHW sensor
– smoke probe.
d
a
4
IT IS FORBIDDEN
to commission the appliance with safety devices which
do not work or which have been tampered with.
DANGER
Safety device may only be replaced by professional
qualified personnel using
parts.
KOVARSON
original spare
KEY:
1
Packaging label
2
Energy Efficiency Label
3
Data plate
3
Fig. 1
1.3.1 Data label
NAME
SERIAL NUMBER
YEAR OF MANUFACTURE
WATER CONTENT IN BOILER
MAX HEAT INPUT
MAX USEFUL OUTPUT (80-60°C)
MAX USEFUL OUTPUT (50-30°C)
MAX OPERATING PRESSURE
D.H.W. CONTENT
MAX HEAT INPUT
MAX OPERATING PRESSURE
FLOW RATE
ELECTRICAL SUPPLY
MAXIMUM ABSORBED POWER
COUNTRY OF INTENDED
INSTALLTION
APPLIANCE CATEGORY
APPLIANCE TYPE
CODE
REFERENCE DIRECTIVE
PIN NO.
MIN HEAT INPUT
MIN USEFUL OUTPUT (80-60°C)
MIN USEFUL INPUT (50-30°C)
MAX OPERATING TEMPERATURE
MIN HEAT INPUT
MAX D.H.W. TEMPERATURE
ELECTRICAL PROTECTION DEGREE
NOx CLASS
GAS COUNCIL NUMBER CODE (UK)
WRAS CERTIFICATION (UK)
TYPE OF GAS
SUPPLY PRESSURE
APPLIANCE CLASSIFICATION
m
Fig. 2
CAUTION
Tampering with, removing or failing to display the identification plate or carrying out any other operation which does not
allow safe identification of the product or which may hinder installation and maintenance operations.
5
1.4 Structure
28
15 16 17
11
12
13
14
10
2930
1
2
3
4
27
26
5
25
6
7
24
8
9
23
22
21
19
18
20
1
Heat exchanger bleed point
2
Heat exchanger
3
Combustion chamber door
4
Oversleeve
5
Flame inspection window
6
Ignition/detection electrode
7
Return probe
8
Heat safety thermostat
9
Flow probe
10
Fan
11
Condensate siphon
12
Diverter valve
13
System filling unit
14
Domestic hot water sensor
15
Control panel
16
Domestic hot water heat exchanger
6
17
Gas valve
18
Domestic hot water filter
19
System safety valve
20
Boiler drain
21
System pump
22
Water pressure transducer
23
Automatic vent valve
24
Air-gas mixer
25
Expansion vessel
26
Air inlet pipe
27
Air-smoke chamber
28
Exhaust flue probe
29
Air inlet
30
Smoke outlet
Fig. 3
1.5 Technical features
DESCRIPTION
20 25 30 35
CERTIFICATIONS
Country of intended installation IT – ES – PT – GR – SI
Fuel G20 / G31
PIN number 1312CP5936
Category II2H3P
Appliance classification B23P - B33P - B53P - C13 - C33 - C43 - C53 - C63 - C83
NO
x
class 5 (< 70 mg/kWh)
HEATING PERFORMANCE
HEAT INPUT (*)
Nominal flow (Q
Minimum flow (Q
n
max) kW 20 24 30 35
nw
min) kW 4 4,8 6 7
HEAT OUTPUT
Nominal (80-60°C) (P
Nominal (50-30°C) (P
Minimum G20 (80-60°C) (P
Minimum G20 (50-30°C) (P
Minimum G31 (80-60°C) (P
Minimum G31 (50-30°C) (P
n
max) kW 19,7 23,6 29,5 34,5
n
max) kW 21,4 25,7 32,2 37,5
n
min) kW 3,9 4,7 5,9 6,9
n
min) kW 4,3 5,1 6,5 7,5
n
min) kW 3,9 4,7 5,9 6,9
n
min) kW 4,3 5,1 6,5 7,5
EFFICIENCY
Max useful efficiency (80-60°C) % 98,5 98,3 98,3 98,6
Min useful efficiency (80-60°C) % 97,5 97,9 98,3 98,6
Max useful efficiency (50-30°C) % 107 107,1 107,3 107,1
Min useful efficiency (50-30°C) % 107,5 106,3 108,3 107,1
Useful efficiency at 30% of load (40-30°C) % 107,0 107,0 107,0 107,0
Thermal efficiency (EEC 92/42)
Losses after shutdown at 50°C W 84 88 88 92
DOMESTIC HOT WATER PERFORMANCE
Nominal heat input (Q
Minimum heat input (Q
nw
max) kW 24 28 34,8 40
nw
min) kW 4 4,8 6 7
Specific D.H.W. flow rate ∆t 30°C (EN 13203) l/min 11,2 12,9 16,5 19,4
Continuous D.H.W. flow rate (∆t 25°C / ∆t 35°C) l/min 13,6 / 9,7 16,1 / 11,5 20 / 14,3 22,9 / 16,4
Minimum D.H.W. flow rate l/min 2 2 2 2
Max (PMW) / Min Pressure
bar 7 / 0,5 7 / 0,5 7 / 0,5 7 / 0,7
kpa 700 / 50 700 / 50 700 / 50 700 / 70
ENERGY PERFORMANCE
HEATING
Heating seasonal energy efficiency class A A A A
Heating seasonal energy efficiency % 90 90 90 91
Sound power db(A) 59 61 58 60
DOMESTIC HOT WATER
Domestic hot water energy efficiency class A A A B
Domestic hot water energy efficiency % 81 80 80 81
Stated domestic hot water profile load XL XL XL XXL
ELECTRICAL SPECIFICATIONS
Power supply voltage V 230
Frequency Hz 50
Absorbed electrical power (Q
Absorbed electrical power at (Q
n
max) W 70 85 92 111
n
min) W 52 52 57 58
Absorbed electrical power in stand-by W 3,6 3,6 3,6 3,6
Electric degree of protection IP X5D
COMBUSTION DATA
Smoke temperature at Max/Min flow (80-60°C) °C 82 / 66 89 / 71 77 / 67 75 / 62
Smoke temperature at Max/Min flow (50-30°C) °C 59 / 45 71 / 51 58 / 49 54 / 39
Maximum smoke flow Min/Max g/s 11,2 / 1,9 13,1 / 2,2 16,3 / 2,8 18,6 / 3,3
CO
2
at Max/Min flow rate (G20) % 9,0 / 9,0 9,0 / 9,0 9,0 / 9,0 9,0 / 9,0
CO
2
at Max/Min flow rate (G31) % 10,0 /10,0 10,0 /10,0 10,0 / 10,0 10,0 / 10,0
NOx measured mg/kWh 39 41 37 65
NOZZLES GAS
Number of nozzles n° 1 1 1 1
ADAX
7
18
M U G E RSc S
TR
DESCRIPTION
Nozzle diameter (G20-G31) mm 5,3 5,3 5,3 5,3
Gas consumption at Max/Min flow rate (G20) m
Gas consumption at Max/Min flow rate (G31) Kg/h 1,86 / 0,31 2,17 / 0,37 2,71 / 0,46 3,10 / 0,74
Gas supply pressure (G20/G31)
TEMPERATURE PRESSURE
Max operating temperature (T max) °C 85
Heating adjustment range °C 20÷80
Domestic hot water adjustment range °C 10÷60
Max operating pressure (PMS)
Water content in boiler l 4,65 4,75 4,95 5,60
3
/h 2,53 / 0,42 2,96 / 0,50 3,70 / 0,63 4,23 / 0,74
mbar 20 / 37 20 / 37 20 / 37 20 / 37
kpa 2 / 3,7 2 / 3,7 2 / 3,7 2 / 3,7
bar 3
kpa 300
20 25 30 35
ADAX
(*) Heat input calculated using the lower heat output (Hi)
Lower Heat Output (Hi)
G20 Hi.
9.45 kW/m3 (15°C, 1013 mbar) -
1.6 Main water circuit
1
2
3
4
5
6
12
7
G31 Hi.
12.87 kW/kg (15°C, 1013 mbar)
11
9
10
8
9
Automatic vent valve
10
Pump
11
CH expansion vessel
12
Diverter valve
13
Automatic by-pass
14
Domestic hot water sensor
15
Gas valve
16
Domestic hot water flow meter
17
Domestic hot water filter
18
Boiler drain
19
System relief valve
20
System filling cock
21
Condensate drain siphon
1.7 Sensors
The sensors installed have the following characteristics:
– Dual sensor (thermal safety/output) NTC R25°C; 10kΩ β25°-
13
21
20
KEY:
M System delivery
R System return
U Domestic hot water outlet
E Domesti hot water inlet
S Safety valve outlet
14
15
16
19
17
Fig. 4
85°C: 3435
– domestic hot water sensor NTC R25°C; 10kΩ β25°-85°C: 3435
– external sensor NTC R25°C; 10kΩ β25°-85°C: 3435
0°C 1°C 2°C 3°C 4°C 5°C 6°C 7°C 8°C 9°C
0°C
27279
26135
25044
24004
23014
22069
21168
20309
19489
18706
17959
17245
16563
15912
15289
14694
14126
13582
13062
8945
6247
4444
3216
2365
1766
1336
1024
12565
8622
6033
4300
3116
2296
1717
1300
998
10°C
20°C
30°C
40°C
50°C
60°C
70°C
80°C
90°C
100°C
12090
8313
5828
4161
3021
2229
1669
1266
973
11634
8016
5630
4026
2928
2164
1622
1232
11199
7731
5440
3897
2839
2101
1577
1199
10781
7458
5258
3773
2753
2040
1534
1168
10382
7196
5082
3653
2669
1982
1491
1137
9999
6944
4913
3538
2589
1925
1451
1108
9633
6702
4751
3426
2512
1870
1411
1079
9281
6470
4595
3319
2437
1817
1373
1051
G Gas supply
Sc Condensate outlet
1
Condensing heat exchanger
2
Combustion chamber
3
Fan
4
Return probe
5
Thermal safety thermostat
6
Flow probe
7
Domestic hot water heat exchanger
8
Pressure transducer
Correspondence of Temperature Detected/Resistance
Examples of reading:
TR=75°C → R=1925Ω
TR=80°C → R=1669Ω.
Resistance R (Ω)
8
1.8 Expansion tank
0 800 1000 1200600400200
100
200
300
400
500
600
The expansion vessel installed on the boilers has the following
characteristics:
Description U/M
Total capacity l 9,0 10,0
Prefilling pressure
Useful capacity l 5,0 6,0
Maximum system
content (*)
(*) Conditions of:
Average maximum temperature of the system 85°C
Start temperature at system filling 10°C.
m
CAUTION
– For systems with water content exceeding the
maximum system content (as indicated in the
table) an additional expansion vessel must be
prearranged.
– The difference in height between the relief valve
and the highest point of the system cannot exceed
6 metres. If the difference is greater than 6 metres,
increase the prefilling pressure of the expansion
vessel and the system when cold by 0.1 bar for each
meter increase.
kPa 100
bar 1,0
20 25 30 35
l 124 140
ADAX
1.9 Circulation pump
The flow-head performance curve available for the heating
system is shown in the graph below.
1.9.1 Pump equipped with LED
LED
Fig. 6
ADAX 30
warning lights which indicate:
For the "Any pump faults and possible solutions" see the
relevant section at the end of the manual.
and
ADAX 35
LED colour Status Trouble-shooting
LED off No electrical power
Green
Red/Green Flashing
Red Flashing Permanent safety shutdown
boilers use the pump equipped with LED
Permanently
on
Normal operation
"Transient safety shutdown"
Anomaly in progress
RESIDUAL HEAD (mbar)
0
m
CAUTION
The appliance is equipped with a by-pass which
ensures water circulation in the boiler when the
thermostatic valves or cocks are used in the system.
40
35
25
30
FLOW RATE (l/h)
Fig. 5
9
1.10 Control panel
21
1
FUNCTIONAL BUTTONS
If pressed once or more than once for at least 1 second
y
during normal operation, this button allows the user
to change the boiler operating mode in a cyclical
sequence (Stand-by – Summer – Winter). If the boiler is
experiencing a fault which can be reset, it allows boiler
operation to be unblocked.
During normal operation, pressing the button displays
r
the domestic hot water set point which can be between
10 and 60°C. In "parameter setting", the user can scroll
through the parameter index (decreasing) by pressing
this button.
During normal operation, pressing the button displays
t
the heating set point which can be between 20 and
80°C. In "parameter setting", the user can scroll
through the parameter index (increasing) by pressing
this button.
Fig. 7
NOTE:
pressing any one of these buttons for more than 30
seconds generates a fault on the display without preventing
boiler operation. The warning disappears when normal
conditions are restored.
2
DISPLAY
“SUMMER”
l
operating in "Summer" mode or if only the domestic
hot water mode is enabled via the remote control. If the
symbols
chimney sweep function is active.
“WINTER”
n
operating in "Winter" mode or if both the domestic hot
water and heating modes are enabled via the remote
control. With the remote control, if no operating modes
have been enabled both symbols
“RESET REQUIRED”
d
having repaired the fault, normal boiler operation can be
restored by pressing the button
“DOMESTIC HOT WATER”
r
a DHW request or during the "chimney sweep function"
It flashes during the selection of the domestic hot water
set point.
“HEATING”
t
operation or during the "chimney sweep function It
flashes during the selection of the heating set point.
“BLOCK” DUE TO NO FLAME
f
“FLAME PRESENCE”
F
“POWER LEVEL”
v
the boiler is operating.
“PARAMETER”
p
parameter setting/display, or "info" or "counter", or in
"activated alarms" (history).
“ALARM”
A
number specifies the cause which generated the alarm.
“CHIMNEY SWEEP”
z
sweep function" has been activated.
. This symbol appears when the boiler is
and n are flashing, this indicates that the
l
. This symbol appears when the boiler is
and n will be off.
l
. The message indicates that after
.
y
. This symbol is present during
. This symbol lights up during heating
.
.
. This indicates the power level at which
. This indicates that the user may be in
. This indicates that a fault has occurred. The
. This indicates that the "chimney
During normal operation, pressing this button allows
<
the user to reduce the heating or DHW set point on
the basis of the selection made previously. If there is a
Remote Control (Open Therm), after having selected the
heating button, the user can modify the incline of the
climatic curve (decreasing it) by pressing the button (
In "parameter setting/display", the user can modify the
parameter setting or value (decreasing) by pressing this
button.
During normal operation, pressing this button allows
>
the user to increase the heating or DHW set point on
the basis of the selection made previously. If there is a
Remote Control (Open Therm), after having selected the
heating button, the user can modify the incline of the
climatic curve (increasing it) by pressing the button (
In "parameter setting/display", the user can modify the
parameter setting or value (increasing) by pressing this
button.
Programming connector cover plug.
c
10
-
).
+
).
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