GENERAL
10
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 with
R
gas burners, calibrated with CO
2
= 9,7%,
λ
= 1,2 and with
R
fuel oil burners calibrated
with CO
2
= 12,5%.
TECHNICAL SPECIFICATIONS
DESCRIPTION
RTQ 3S
35
55
70
Fuel
GAS / OIL
Rated heat input
min
25
35
55
kW
max
34,8
55
69
kW
Rated useful heat output Pn
min
23,6
33,3
51,8
kW
max
32,8
51,6
65,0
kW
Useful efficiency at minimum Pn
94,2
95,1
94,2
%
Useful efficiency at maximum Pn
94,2
93,8
94,2
%
Useful efficiency at 30% (47°C)
95,9
95,5
95,9
%
Constant pressure drop
< 1,5
%
Flue gas temperature
98
94
92
°C
Flue gas mass flow rate
0,015
0,024
0,030
kg/sec
Furnace pressure
0,4
0,9
0,6
mbar
Furnace volume
37,8
45,2
80,2
dm
3
Total volume of flue gas side
62,2
73,4
119,1
dm
3
Total surface area for heat exchange
1,90
2,50
3,02
m
2
Volumetric heat load
921
1187
872
kW/m
3
Specific heat load
17,8
21,3
22,4
kW/m
2
Maximum operating pressure
6
bar
Maximum admissible temperature
110
°C
Maximum operating temperature
95
°C
Min. admissible water return temp.
50
°C
Pressure drop ∆T 10°C
10,0
20,0
40,0
mbar
Pressure drop ∆T 20°C
5,0
3,0
10,0
mbar
Water capacity
71
87
103
litres
Turbulators
14
16
22
n°
ACCESSORY
CODE
Hydraulic connection kit
r
7300
4030030
ACCESSORIES