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Information about the appliance
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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...
