13
2. SECTION - TECHNICAL DATA
2.1
Central Heating
UNICA MAX 20S
UNICA MAX 30S
Heat input (kW)
20.00***
(***) The rated heat input with gas
G20.2 (I2Y20) undergoes a reduction:
Qn heating = 18.9 kW
32.00
Maximum heat output (kW) 60/80°C
19.50
31.23
Minimum heat output (kW) 60/80°C
3.46
4.69
Maximum heat output (kW) 30/50°C
21.32
34.37
Minimum heat output (kW) 30/50°C
3.85
5.06
Minimum working pressure
0.25÷0.45 bar
Maximum working pressure
3.0 bar
Minimum flow rate
350 l/h
2.2
Gas Pressures
UNICA MAX 20S
UNICA MAX 30S
Inlet pressure (G20)
20.0 mbar
20.0 mbar
Heating maximum gas rate (m
3
/hr)
2.12
3.38
Minimum gas rate (m
3
/hr)
0.38
0.52
Injector size (mm)
1 x 4.3
1 x 5.2
2.3
Expansion Vessel
UNICA MAX 20S
UNICA MAX 30S
Capacity
9 litres
10 litres
Maximum system volume
74 litres
Pre-charge pressure
1 bar
2.4
Dimensions
UNICA MAX 20S
UNICA MAX 30S
Height (mm)
740
Width (mm)
420
470
Depth (mm)
275
350
Dry weight (kg)
32
37.5
2.5
Clearances required for maintenance
UNICA MAX 20S
UNICA MAX 30S
Sides
2mm*
Top
100mm** from casing or 25mm above flue elbow (whichever is applicable)**
Bottom
100mm^
Front
450mm^^
* It may be necessary to remove adjacent components if component removal/replacement is required
** Consideration should be given to providing reasonable clearance for the insertion of a FGA probe.
^ This can be reduced to 4mm if a removal panel enables the required 100mm
^^ When installed in a cupboard, this dimension can be reduced to 4mm provided that the required 450mm is available when the door is opened/
removed.
2.6
Connections
UNICA MAX 20S
UNICA MAX 30S
Flow & return
22mm
Gas
15mm
DHW hot & cold
15mm
Safety valve
15mm
Condense
21mm
2.7
Electrical
UNICA MAX 20S
UNICA MAX 30S
Power consumption CH (Watts)
98
112
Voltage (V/Hz)
230/50
Internal fuse
4 A T (for PCB) - 3.15A F (for connections block)
External fuse
3A
2.8
Flue Details (concentric 60-100)
UNICA MAX 20S
UNICA MAX 30S
Maximum horizontal flue length (60/100mm)
10.0 m
6.0 m
Maximum vertical flue length (60/100mm)
11.0 m
7.0 m
2.9
Efficiency
UNICA MAX 20S
UNICA MAX 30S
SEDBUK 2005 (%)
90.1
90.2
2.10 Emissions
UNICA MAX 20S
UNICA MAX 30S
CO2 @ maximum output (%) (*)
9.0
9.0
CO2 @ minimum output (%) (*)
9.0
9.0
CO @ maximum output (ppm)
130
170
CO @ minimum output (ppm)
10
10
NOx rating
class 6
class 6
(*) CO
2
tolerance = +0.6% -1%
2.11 Fan rotations
UNICA MAX 20S
UNICA MAX 30S
Number of fan rotations with slow ignition (rpm)
5,500
5,500
Maximum number of heating fan rotations (rpm)
6,200
7,300
Minimum number of heating fan rotations (rpm)
1,600
1,700
2.12 Gas pressure
UNICA MAX 20S
UNICA MAX 30S
Nominal methane gas pressure (G20 - I2H)
20 mbar
20 mbar
Nominal methane-hydrogen gas pressure (G20.2 - I2Y20)
20 mbar
20 mbar
Nominal liquid gas LPG pressure (G31 - I3P)
37 mbar
37 mbar
