Bosch ZWB28-3A - Technical Data Heating Boiler ZBR28-3 A

22 | Information about the appliance
Copyright (optional information)6 720 643 068 (2011/06)
3.12 Technical data heating boiler ZBR28-3A...
Unit NG LPG (propane)
Output
Maximum nominal output (P
max
) 104/86 °F (40/30 °C) BTU/hr (kW) 93,800 (27.5) 93,800 (27.5)
Maximum nominal output (P
max
) 122/86 °F (50/30 °C) BTU/hr (kW) 93,100 (27.3) 93,100 (27.3)
Maximum nominal output (P
max
) 176/140 °F (80/60 °C) BTU/hr (kW) 89,400 (26.2) 89,400 (26.2)
Max. nominal thermal load (Q
max
) heating (H
i
) 180/79 °F (82/26 °C) BTU/hr (kW) 90,800 (26.6) 90,800 (26.6)
Max. nominal thermal load (Q
max
) heating (H
s
) 180/79 °F (82/26 °C) BTU/hr (kW) 100,800 (29.5) 98,600 (28.9)
Min. nominal output (P
min
) 104/86 °F (40/30 °C) BTU/hr (kW) 23,900 (7.0) 39,900 (11.7)
Min. nominal output (P
min
) 122/86 °F (50/30 °C) BTU/hr (kW) 23,900 (7.0) 39,600 (11.6)
Min. nominal output (P
min
) 176/140 °F (80/60 °C) BTU/hr (kW) 21,800 (6.4) 36,200 (10.6)
Min. nominal thermal load (Q
min
) heating (H
i
) 180/79 °F (82/26 °C) BTU/hr (kW) 22,200 (6.5) 36,800 (10.8)
Min. nominal thermal load (Q
min
) heating (H
s
) 180/79 °F (82/26 °C) BTU/hr (kW) 24,600 (7.2) 40,100 (11.7)
Max. nominal thermal load (Q
max
) tank (H
i
) BTU/hr (kW) 90,800 (26.6) 90,800 (26.6)
Max. nominal thermal load (Q
max
) tank (H
s
)BTU/hr (kW)100,800 (29.5) 98,600 (28.9)
Min. nominal thermal load (Q
min
) tank (H
i
)BTU/hr (kW)22,200 (6.5) 36,800 (10.8)
Min. nominal thermal load (Q
min
) tank (H
s
)BTU/hr (kW)24,600 (7.2) 40,100 (11.7)
Gas connection value
Natural Gas – H
s
= 1,010 BTU/ft
3
(37.3MJ/m
3
)ft
3
/hr (m
3
/h) 99 (2.8) –
Liquid Propane Gas – H
D-S
= 2,500 BTU/ft
3
(93.1MJ/m
3
)ft
3
/hr (m
3
/h) – 39 (1.1)
Permissible inlet gas pressure
NG in. W.C. (mbar) 3.5-10.5" (8.7-26.1) -
LPG (propane) in. W.C. (mbar) – 8-13" (19.9-32.3)
Calculation values for calculating cross-section to EN 13384
Flue gas mass flow at maximum/minimum nominal output gps 12.0/3.2 11.6/4.8
Flue gas temperature 176/140 °F (80/60 °C) at maximum/minimum
nominal heat input
°F ( °C)
147/133 (64/56) 147/133 (64/56)
Flue gas temperature 104/86 °F (40/30 °C) at maximum/minimum
nominal heat input
°F ( °C)
117/90 (47/32) 117/90 (47/32)
CO
2
at max. nominal output % 9.4 11.0
CO
2
at minimum nominal output % 8.6 10.4
Condensate
Max. condensate quantity (t
R
= 86 °F (30 °C)) gph (l/h) 0.6 (2.3) 0.6 (2.3)
pH level, approx. 4.8 4.8
Tab. 5 Technical data heating boiler ZBR28-3A...