13
GENERAL
b
The stack must guarantee the minimum draught specified by applicable technical standards, assuming zero pres-
sure at the connection to the flue gas exhaust.
b
Values obtained in combination with the reference burners (R) indicated in the combination table.
b
When used in conjunction with fuel oil burners, RTQ 3S boilers <400kW conform to:
- Energy-Related Products Directive 2009/125/EC
- EU Delegated Regulation 813/2013
DESCRIPTION
RTQ 3S
91
115
166
217
255
318
349
Device type
Central Heating
B23
Fuel
OIL
Device category
See burner
Maximum rated heat input HCV (LCV)
95,4
(90)
122
(115)
176,0
(166)
230,1
(217)
270,4
(255)
337,2
(318)
369,0
(348)
kW
Minimum rated heat input HCV (LCV)
74,2
(70)
95,4
(90)
122
(115)
176,0
(166)
230,1
(217)
270,4
(255)
337,2
(318)
kW
Maximum useful output (80°/60° C) P4
84,8
110,2
158,7
206,8
243,0
303,4
332,0
kW
Minimum useful output (80°/60° C) (Pn min)
66,9
86,6
110,4
159,2
208,8
244,3
304,0
kW
30% heat output with return at 37°C (P1)
25,7
33,1
47,6
62,0
72,9
91,0
99,9
kW
Seasonal energy efficiency
h
s
89,0
89,0
89,0
89,0
90,0
90,0
90,0
%
Efficiency at rated heat input in high tempe-
rature mode
h
4 (80-60°C) HCV (LCV)
88,8
(94,2)
90,3
(95,8)
90,2
(95,6)
89,9
(95,3)
89,9
(95,3)
90,0
(95,4)
90,0
(95,4)
%
Useful efficiency at min Pn (80-60°C) HCV
(LCV)
90,1
(95,6)
90,7
(96,2)
90,5
(96,0)
90,4
(95,9)
90,7
(96,2)
90,3
(95,8)
90,1
(95,6)
%
Efficiency at rated heat input in low tem-
perature mode
h
1 with return at 37°C HCV
(LCV)
94,0
(99,7)
94,0
(99,7)
94,0
(99,7)
94,0
(99,7)
94,0
(99,7)
94,1
(99,8)
94,1
(99,8)
%
Constant pressure drop
260
330
400
480
550
620
680
W
Flue gas temperature (∆T)
93
95 ÷ 108
°C
Flue gas mass flow rate
0,040
0,050
0,072
0,094
0,111
0,139
0,151
kg/sec
Furnace pressure
2,0
1,5
1,3
2,2
2,8
3,2
3,9
mbar
Furnace volume
97,4
91,0
138,4
199,1
199,1
298,9
298,9
dm
3
Total volume of flue gas side
139,7
163,2
234,3
317,2
325,6
457,9
457,9
dm
3
Total surface area for heat exchange
3,62
4,35
6,68
8,59
9,47
12,34
12,34
m
2
Volumetric heat load
928
1264
1199
1090
1281
1064
1164
kW/m
3
Specific heat load
24,1
25,2
23,8
24,1
25,7
24,6
26,9
kW/m
2
Maximum operating pressure
6
bar
Maximum admissible temperature
110
°C
Maximum operating temperature
95
°C
Min. admissible water return temp.
37
°C
Pressure drop ∆T 10°C
42,0
15,1
42,0
76,5
144,0
148,0
162,0
mbar
Pressure drop ∆T 20°C
14,0
3,0
11,2
17,2
45,0
27,2
29,7
mbar
Water capacity
126
161
191
268
258
308
308
litri
Turbulators
22
22
30
34
39
44
44
n°
Consumption at full load (Elmax)
460
460
460
530
660
660
760
W
Consumption at part load (Elmin)
138
138
138
159
198
198
228
W
Electrical consumption in standby mode
(Psb)
20
20
20
20
20
20
20
W
Technical data for boilers with fuel oil burners <400 kw
TECHNICAL DATA FOR BOILERS WITH FUEL OIL BURNERS <400 KW
