Viessmann Vitocrossal CRU 800 Service Instructions For Contractors page 65

Specification
(cont.)
Vitocrossal, type
Rated heating output range
P : T /T 80/60 °C
n F R
P : T /T 50/30 °C
cond F R
Gas flow rate, natural gas LL (G25) at 15 °C,
1.013 bar
At rated heating output
■
At partial load
■
Flue gas parameters
*2
Flue gas temperature ( T
At rated heating output
■
At partial load
■
Flue gas temperature ( T
At rated heating output
■
At partial load
■
Flue gas mass flow rate, natural gas E (G20)
At rated heating output
■
At partial load
■
Flue gas mass flow rate, natural gas LL (G25)
At rated heating output
■
At partial load
■
Flue gas connection
Draught at the flue outlet
Flue gas volume
Efficiency
H at T /T 80/60 °C, full load (100 %)
■
s F R
H at T /T 50/30 °C, full load (100 %)
■
s F R
H at T /T 50/30 °C, partial load (30 %)
■
s F R
Standard seasonal efficiency [to DIN]
H at 40/30 °C
■
s
H at 75/60 °C
■
s
Idle losses (via ambient temperature)
50 K
■
30 K
■
Standby loss q
B,70
*2 Values for calculating the size of the flue system to EN 13384, based on 10 % CO
Flue gas temperatures as actual gross values at 20 °C combustion air temperature.
The details for partial load refer to the lower rated heating output (30 %). If the partial load differs (subject to burner operat-
ing mode), calculate the flue gas mass flow rate accordingly.
/T 50/30 °C)
V R
/T 80/60 °C)
V R
CRU 800
kW 125 to 750
kW 137 to 800
3
m /h
3
m /h
°C
°C
°C
°C
kg/h
kg/h
kg/h
kg/h
mm
7
Pa
mbar
m 3
%
%
%
%
%
kW
kW
%
for natural gas.
2
Specification
CRU 1000
156 to 938
171 to 1000
93.8 117.3
15.6
43
34
67
63
1249
233
1273
237
300
70
0.7
0.45
88
96
98
99
96
2.7
1.0
0.4
19.6
45
35
69
63
1562
291
1592
297
300
70
0.7
0.50
88
95
97
98
96
2.8
1.1
0.7
65