Bosch ZWB28-3A - Technical Data Combi Boiler ZWB42-3 A

30 | Information about the appliance
Copyright (optional information)6 720 643 068 (2011/06)
3.16 Technical data combi boiler ZWB42-3A...
Unit NG LPG (propane)
Output at elevation 0 - 2000 feet (0 - 610 m)
Maximum nominal output (P
max
) 104/86 °F (40/30 °C) BTU/hr (kW) 137,500 (40.3) 137,500 (40.3)
Maximum nominal output (P
max
) 122/86 °F (50/30 °C) BTU/hr (kW) 137,500 (40.3) 137,500 (40.3)
Maximum nominal output (P
max
) 176/140 °F (80/60 °C) BTU/hr (kW) 134,400 (39.4) 134,400 (39.4)
Max. nominal thermal load (Q
max
) heating (H
i
) 180/79 °F (82/26 °C) BTU/hr (kW) 136,500 (40.0) 136,500 (40.0)
Max. nominal thermal load (Q
max
) heating (H
s
) 180/79 °F (82/26 °C) BTU/hr (kW) 151,600 (44.4) 148,300 (43.5)
Min. nominal output (P
min
) 104/86 °F (40/30 °C) BTU/hr (kW) 35,500 (10.4) 46,400 (13.6)
Min. nominal output (P
min
) 122/86 °F (50/30 °C) BTU/hr (kW) 35,100 (10.3) 46,100 (13.5)
Min. nominal output (P
min
) 176/140 °F (80/60 °C) BTU/hr (kW) 31,700 (9.3) 42,000 (12.3)
Min. nominal thermal load (Q
min
) heating (H
i
) 180/79 °F (82/26 °C) BTU/hr (kW) 32,400 (9.5) 42,700 (12.5)
Min. nominal thermal load (Q
min
) heating (H
s
) 180/79 °F (82/26 °C) BTU/hr (kW) 36,000 (10.5) 46,400 (13.6)
Max. nominal output (P
max
) DHW (H
i
) 113°F (45°C) BTU/hr (kW) 137,500 (40.3) 137,500 (40.3)
Max. nominal output (P
max
) DHW (H
s
) 140°F (60°C) BTU/hr (kW) 135,800 (39.8) 135,800 (39.8)
Max. nominal thermal load (Q
max
) DHW (H
i
) BTU/hr (kW) 136,500 (40.0) 136,500 (40.0)
Max. nominal thermal load (Q
max
) DHW (H
s
)BTU/hr (kW)151,600 (44.4) 148,300 (43.5)
Min. nominal thermal load (Q
min
) DHW (H
i
)BTU/hr (kW)32,400 (9.5) 42,700 (12.5)
Min. nominal thermal load (Q
min
) DHW (H
s
)BTU/hr (kW)36,000 (10.5) 46,400 (13.6)
Output at elevation 2000 - 4500 feet (611 - 1372 m) above sea level
Maximum nominal output (P
max
) 104/86 °F (40/30 °C) BTU/hr (kW) 123,750 (36.3) 129,250 (37.9)
Maximum nominal output (P
max
) 122/86 °F (50/30 °C) BTU/hr (kW) 123,750 (36.3) 129,250 (37.9)
Maximum nominal output (P
max
) 176/140 °F (80/60 °C) BTU/hr (kW) 120,960 (35.5) 126,336 (37.0)
Max. nominal thermal load (Q
max
) heating (H
i
) 180/79 °F (82/26 °C) BTU/hr (kW) 122,850 (36.0) 128,310 (37.6)
Max. nominal thermal load (Q
max
) heating (H
s
) 180/79 °F (82/26 °C) BTU/hr (kW) 136,440 (40.0) 139,402 (40.9)
Max. nominal output (P
max
) DHW (H
i
) 113°F (45°C) BTU/hr (kW) 123,750 (36.3) 129,250 (37.9)
Max. nominal output (P
max
) DHW (H
s
) 140°F (60°C) BTU/hr (kW) 122,220 (35.8) 127,652 (37.4)
Max. nominal thermal load (Q
max
) DHW (H
i
) BTU/hr (kW) 122,850 (36.0) 128,310 (37.6)
Max. nominal thermal load (Q
max
) DHW (H
s
)BTU/hr (kW)136,440 (40.0) 139,402 (40.9)
Output at elevation 4500 - 7000 feet (1373 - 2134 m) above sea level
Maximum nominal output (P
max
) 104/86 °F (40/30 °C) BTU/hr (kW) 114,125 (33.5) 119,625 (35.1)
Maximum nominal output (P
max
) 122/86 °F (50/30 °C) BTU/hr (kW) 114,125 (33.5) 119,625 (35.1)
Maximum nominal output (P
max
) 176/140 °F (80/60 °C) BTU/hr (kW) 111,552 (32.7) 116,928 (34.3)
Max. nominal thermal load (Q
max
) heating (H
i
) 180/79 °F (82/26 °C) BTU/hr (kW) 113,295 (33.2) 118,755 (34.8)
Max. nominal thermal load (Q
max
) heating (H
s
) 180/79 °F (82/26 °C) BTU/hr (kW) 125,828 (36.9) 129,021 (37.8)
Max. nominal output (P
max
) DHW (H
i
) 113°F (45°C) BTU/hr (kW) 114,125 (33.5) 119,625 (35.1)
Max. nominal output (P
max
) DHW (H
s
) 140°F (60°C) BTU/hr (kW) 112,714 (33.0) 118,146 (34.6)
Max. nominal thermal load (Q
max
) DHW (H
i
) BTU/hr (kW) 113,295 (33.2) 118,755 (34.8)
Max. nominal thermal load (Q
max
) DHW (H
s
)BTU/hr (kW)125,828 (36.9) 129,021 (37.8)
Gas connection value
Natural Gas – H
s
= 1,010 BTU/ft
3
(37.3MJ/m
3
)ft
3
/hr (m
3
/h) 149 (4.2) –
Liquid Propane Gas – H
D-S
= 2,500 BTU/ft
3
(93.1MJ/m
3
)ft
3
/hr (m
3
/h) – 59 (1.7)
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)
Expansion vessel
Pre-charge pressure psi (bar) 10.9 (0.75) 10.9 (0.75)
Total contents Gal (L) 3.17 (12) 3.17 (12)
DHW
Max. DHW flow rate gpm (l/min) 3.963 (15) 3.963 (15)
Nominal DHW quantity (at 140 °F (60 °C) outlet temperature) gpm (l/min) 3.61 (11.4) 3.61 (11.4)
Outlet temperature °F ( °C) 104 - 140 (40 - 60) 104 - 140 (40 - 60)
Max. cold water inlet temperature °F ( °C) 140 (60) 140 (60)
Max. approved DHW pressure psi (bar) 150 (10.3) 150 (10.3)
Minimum water pressure psi (bar) 4.35 (0.3) 4.35 (0.3)
Tab. 9 Technical data combi boiler ZWB42-3A...