Ferroli Rendimax 23 CE User manual

RENDIMAX CERENDIMAX CE
RENDIMAX CERENDIMAX CE
RENDIMAX CE
CAST IRON GAS-FIRED BOILERCAST IRON GAS-FIRED BOILER
CAST IRON GAS-FIRED BOILERCAST IRON GAS-FIRED BOILER
CAST IRON GAS-FIRED BOILER
for central heatingfor central heating
for central heatingfor central heating
for central heating
Installation and operating instructionsInstallation and operating instructions
Installation and operating instructionsInstallation and operating instructions
Installation and operating instructions
S.p.A.

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Contents
1. Description
2. Dimensions and technical specifications
3. Installation
4. Adjustment
5. Gas conversion
6. Maintenance and cleaning
7. Troubleshooting

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Fig. 1
Version "P.V."Version "BASE"
A
850
BL
G
H
284
1
C
E
D
590
660
E
2
3
C
510
E
F
590
660
3
2
1
4
5
1. DESCRIPTION
1.01 Introduction
RENDIMAX CE boilers are heat generators for central heating and domestic hot water production.
The standard version is designed to work with natural gas.
To use the boiler with L.P.G., on-site conversion must be carried out following the instructions given
below. This conversion must be done by our local Customer Technical Service Center.
2. Dimensions and technical specifications
2.01 Dimensions
KEY
1C.H. flow inlet
2C.H. flow outlet
31/2" gas inlet
4Safety valve (only PV vers)
5Expansion vessel (only PV vers)

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112
3
11
10
8
6
13
7
9
2
4
5
Fig. 2
2.02 Components description
View with open door
KEY
1Boiler thermostat
2Boiler temperature / pressure gauge
3Safety valve
4Gas valve
5Circulation pump (only PV version)
6Boiler drain cock
7Pilot burner
8Piezo-Igniter
9Gas-Manifold
10 Boiler main switch
11 Filling cock
12 Cock
13 Flue thermostat

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Heat output Heat rate
Boiler Rated Adjiustable up to: Min.Rated
Rendimax 16 CE
Rendimax 23 CE
Rendimax 30 CE
Rendimax 36 CE
kW
16,2
23,0
29,5
36,0
kcal/hr
14.000
19.800
25.400
31.000
kW
11,0
16,0
20,0
24,0
kcal/hr
9.500
13.800
17.200
20.600
Section
nr.
3
4
5
6
kW
12,7
18,4
23,0
27,6
kcal/hr
11.000
15.800
19.800
23.800
kcal/hr
15.500
22.000
28.200
34.400
kW
18,0
25,5
32,8
40,0
Natural gas
Boiler
Rendimax 16 CE
Rendimax 23 CE
Rendimax 30 CE
Rendimax 36 CE
Nozzle
nr.
2
3
4
5
L.P.G.
Ø Main
burner
mm
2,45
2,35
2,35
2,35
Ø Pilot
burner
mm
0,35
0,35
0,35
0,35
Rated
gas
pressure
mbar
13,0
15,2
14,2
13,5
Ø Main
burner
mm
1,55
1,50
1,50
1,50
Ø Pilot
burner
mm
0,225
0,225
0,225
0,225
Rated
gas
pressure
mbar
35
35
35
35
Boiler weight
kg
PV
vers.
80
94
112
/
BASE
vers.
70
84
102
126
Connections
Boiler
Rendimax 16 CE
Rendimax 23 CE
Rendimax 30 CE
Rendimax 36 CE
A
mm
400
400
500
600
B
mm
57
62
72
82
C
mm
33
33
33
58
D
mm
100
110
130
150
E
mm
63
25
36
50
F*
mm
73
35
46
-
G
mm
515
515
515
525
H*
mm
635
635
635
-
L
mm
615
615
615
625
Return
1
1"
1"
1"
1"
Flow
2
1"
1"
1"
1"
Gas
inlet
3
1/2"
1/2"
1/2"
3/4"
Max
working
pressure
bar
4
4
4
4
Boiler water
content
lt.
7,3
9,0
10,7
12,4
Expans.
vessel
vol.
6
6
8
-
lt.
Boiler
Rendimax 16 CE
Rendimax 23 CE
Rendimax 30 CE
Rendimax 36 CE
Rated
1,94
2,70
3,47
4,23
Min.
1,16
1,69
2,46
2,95
Gas flow rate at the
burner for L.P.G. kg/hr
Rated
1,50
2,08
2,68
3,27
Min.
0,90
1,31
1,63
1,96
Gas flow rate at the
burner for N.G. m /hr
3
Connection dimentions
*Only P.V. version*Only P.V. version
*Only P.V. version*Only P.V. version
*Only P.V. version
3. INSTALLATION
Installation must be carried out by specialist companies only in accordance with all instructions and
current regulations.
You are advised to include gate valves between the boiler and the C.H. system so that the boiler can
be isolated from the system if necessary.
Notes: If the path followed by the C.H. flow outlet and return inlet pipes is such as to allow for the
formation of air pockets at certain points, you are recommended to fit an air valve at these points.
The diameter of the flue connection pipe must not be less than that of the coupling on the draft
diverter. From the draft diverter, it must have a vertical section of not less than one and a half meters.
When sizing and installing flues and the flue connecting pipe, current regulations must be respected.
If the fuel duct pass through flammable wall it has been well insulated.
2.03 Technical data (Max. working temperature 100°C)

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230V
50Hz
23
49 49
23
L
8
9
10
98
N
1
4
1
2
3
2
3
44
1
C
92
11
114
160
32
63
12
13
6
5
4
2
7
92
1
63
2
C
1
98
1
4
2
324
3
57968 1513
10 11 12 1614
160114 32 44
230V
50Hz
LN
Fig. 3
Connection between boiler and chimney has to be sealed.
The rated flow rate of gas counter has to be sufficient for the whole connected appliance.
Be careful that the boilers connections are free of mechanical tensions.
Connect the gas using a rigid pipe and including a gas cock.
The boiler must be connected to a 230 Volt - 50 Hz single phase line (phase/neutral) by means of
terminal board of approved socket. A 5 A max. fuse should be included between the boiler and line.
It is important to ensure that the boiler is connected to an efficient earth system. The terminal board
for connecting the boiler to the room thermostat (if used) is inside the control panel (follow the
electrical wiring diagram fig. 3).
3.01 Electrical connection
The electrical connections has be carried out according the following electrical schema. If the boiler
is installed below the level of the C.H. system, you are recommended to install a sensor against the
water absence.
NB: The manufacturer declines all responsibility for damage to persons or things deriving from
poor earthling of the appliance.
DIAGRAM OF ELECTRICAL CONNECTION
Key
23 Thermocouple
32 C.H. pump (if fitted)
44 Gas valve coil
49 Safety thermostat
63 Boiler thermostat
BASIC ELECTRICAL WIRING DIAGRAM
92 Flue gas thermostat
98 Main switch
114 Water pressure switch (not fitted)
160 Auxiliary contact

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Fig. 4
3.02 Checking and controlling the evacuation of combustion products (total security)
The boiler is fitted with a FLUE GAS THERMOSTAT . This thermostat prevents gas from reaching the
burner if the flue is not drawing properly, providing greater security and control over the discharge of
combustion products.
If the FLUE GAS THERMOSTAT is activated, unscrew the protective cover on the control panel (Fig.
2 part. 13) and “reset” the thermostat manually. The boiler will then operate normally again.
If you replace the FLUE GAS THERMOSTAT, use original components only and make sure the electrical
connections are carried out correctly. NEVER EXCLUDE THE FLUE GAS THERMOSTAT FROM THE
ELECTRICAL CIRCUIT. If it keeps activating, contact qualified personnel only.
3.03 Pressure drop in relation to C.H. water flow rate (fig. 4)
Fig. 5a
3.04 Pump characteristics (only P.V. version)
1,2,3,=position of the built-in pump speed selector knob (fig. 5a)

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Fig. 5b
3.05 C.H. pump head characteristics (only P.V. version)(Fig. 5b)
NB - The diagram refers to maximum pump (Pos. 3) head/flow rate.
4. IGNITION AND SHUT-DOWN
4.01 Checks to carry out before igniting for the first time
When igniting the boiler for the first time, it is good practice to check:
- that the gate valves between the boiler and system are open;
- that the system is correctly filled and vented;
- that there are no gas or water leaks from the system or boiler;
- that the electrical connections are correct and the earth wire has been connected to an
efficient earth installation;
- that there are no inflammable liquids or materials near the boiler;
- that the flue is free from obstructions.
4.02 Igniting the boiler with ELETTROSIT gas valve(fig. 6)
Position the boiler thermostat on minimum.
Open the gas cock and vent the air present in the tube upstream from the gas valve by opening the
pressure point screw pos1.
Push down gas valve button 2 and hold it down.
Ignite the pilot burner by pressing the piezoelectric igniter 8 (fig.2) on the left side of the boiler.

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HONEYWELL V4600C GAS VALVEHONEYWELL V4600C GAS VALVE
HONEYWELL V4600C GAS VALVEHONEYWELL V4600C GAS VALVE
HONEYWELL V4600C GAS VALVE
Keep gas valve button 2 pushed down for 20 seconds then let it up slowly checking that the pilot
burner remains lit. If it goes out, wait 30 seconds then repeat the ignition operation.
Set the button 3 as shown in the fig. 3
Turn on the electricity to the boiler.
Position the boiler thermostat 1 (fig. 2) on the required temperature (not lower than 45°C). The main
burner switch-on and the boiler start working controlled by regulation thermostat of room thermostat
(if connected).
ELETTROSIT GAS VALVE
fig. 6
Key
1Downstream pressure test point
2Ignition/shut down button
3Key for ignition
4Shut down button
5Upstream pressure test point
6Pilot adjustment screw
7Main burner adjustment screw
8Slow opening adjustment screw
4.03 Igniting the boiler with HONEYWELL V4600C gas valve(fig 7a)
Position the boiler thermostat 1 (fig. 2) on minimum. Open the gas cock and vent the air present in
the tube upstream from the gas valve by opening the pressure point screw pos 3. Turn on the electricity
to the boiler. Ignite the pilot burner by
pressing the piezoelectric igniter 8 (fig.2) on
the left side of the boiler. Keep gas valve
button 1 pushed down for 20 seconds then
let it up slowly checking that the pilot burner
remains lit. If it goes out, wait 30 seconds
then repeat the ignition operation. Position
the boiler thermostat 1 (fig. 2) on the required
temperature (not lower than 45°C). The main
burner switch-on and the boiler start working
controlled by regulation thermostat of room
thermostat (if connected).
fig. 7a
Key
1Ignition/shut down button
2Pilot adjustment screw
3Downstream pressure test point
4Upstream pressure test point
7Main burner adjustment screw

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IgniteIgnite
IgniteIgnite
Ignite
pilotpilot
pilotpilot
pilot
burnerburner
burnerburner
burner
IgniteIgnite
IgniteIgnite
Ignite
mainmain
mainmain
main
burnerburner
burnerburner
burner
Shuth-downShuth-down
Shuth-downShuth-down
Shuth-down
completelycompletely
completelycompletely
completely
the boilerthe boiler
the boilerthe boiler
the boiler
SIT NOVA 820 GAS VALVE
4.04 Igniting the boiler with SIT NOVA gas valve(fig 7b)
Position the boiler thermostat 1 (fig. 2) on minimum.
Open the gas cock and vent the air present in the tube upstream from the gas valve by opening the
pressure point screw pos4. (fig 7b)
Push and keep pushed the knob in the position “a”.
Ignite the pilot burner by pressing the piezoelectric igniter 8 (fig.2) on the left side of the boiler.
Keep gas valve button 1 pushed down for 20 seconds then let it up slowly checking that the pilot
burner remains lit. If it goes out, wait 30 seconds then repeat the ignition operation.
Turn the knob in the position “b”.
Turn on the electricity to the boiler.
Position the boiler thermostat 1 (fig. 2) on the required temperature (not lower than 45°C). The main
burner switch-on and the boiler start working controlled by regulation thermostat of room thermostat
(if connected).
fig. 7b
Key
1Command knob
2Main burner adjustment screw
3Pilot adjustment screw
4Inlet gas adjustment screw
5Upstream pressure test point