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Vitocrossal 300 CU3A 26 to 199 Technical Data
Technical Data
Boiler Model No. CU3A
Dimensions
Overall depth
Overall width
Overall height
(with control interface open)
Overall height
Flue gas *4
Temperature (at boiler return
temperature of 86ºF (30ºC)
- at rated full load
- at rated partial load
Temperature (at boiler return
temperature of 140ºF (60ºC)
Max. condensate flow rate *5
for NG and LPG
T
/T
=104/86ºF (40/30ºC)
S
R
Condensate connection
Boiler flue gas connection *6
Combustion air supply connection
Sound Rating (A scale)
- at maximum input
- at minimum input
Standby losses *7
*4
Measured flue gas temperature with a combustion air temperature of 68°F (20°C).
*5
Based on maximum input rate.
*6
For side wall vent installations (coaxial system):
Do not exceed max. equivalent length specified in the Installation Instructions of the Vitocrossal 300 CU3A
Venting System.
Do not attempt to common-vent Vitocrossal 300 CU3A with any other appliance.
Side wall co-axial vent installation must include Viessmann protective screen!
For details refer to the Installation Instructions for the Vitocrossal 300 CU3A Venting System.
*7
Standby losses measured from the boiler temperature sensor well based on a boiler water temperature of 158°F
(70°C) and a room temperature of 68°F (20°C).
For information regarding other Viessmann System Technology componentry, please reference documentation
of respective product.
26, 94
inches
27
(mm)
684
inches
26
(mm)
660
inches
67
(mm)
1707
inches
61.5
(mm)
1562
ºF (ºC)
113 (45)
ºF (ºC)
90 (32)
ºF (ºC)
167 (75)
USG/h
0.9
(L/h)
3.43
hose
nozzle
Ø in.
¾
Ø
in. (mm)
3 (80)
outer
Ø in. (mm)
3 (80)
dB
48
dB
32
BTU/hr
1128
W/hr
330
35, 125
45, 160
27
31b
684
801
26
26
660
660
67
67
1707
1707
61.5
61.5
1562
1562
113 (45)
113 (45)
90 (32)
90 (32)
167 (75)
167 (75)
1.2
1.6
4.62
5.95
¾
¾
3 (80)
4 (110)
3 (80)
3 (80)
55
53
33
33
1000
1120
292
328
Technical Data
57, 199
31b
801
26
660
67
1707
61.5
1562
113 (45)
90 (32)
167 (75)
2.1
7.92
¾
4 (110)
3 (80)
58
33
995
291
5
5
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