Bosch KWB42-3 User Manual

Information about the appliance | 23
6 720 810 590 (2015/05)
Greenstar FS
3.18 Technical data combi boiler KWB 42 - 3
Input/Output Unit NG LPG (Propane)
Max. input rate 180/79 °F (82/26 °C) BTU/hr (kW) 151,600 (44.4) 148,300 (43.5)
Max. output rate 104/86 °F (40/30 °C) BTU/hr (kW) 137,500 (40.3) 137,500 (40.3)
Max. output rate 122/86 °F (50/30 °C) BTU/hr (kW) 137,500 (40.3) 137,500 (40.3)
Max. output rate 176/140 °F (80/60 °C) BTU/hr (kW) 134,400 (39.4) 134,400 (39.4)
Output rate domestic hot water (DHW) 113 °F (45 °C) BTU/hr (kW) 137,500 (40.3) 137,500 (40.3)
Output rate domestic hot water (DHW) 140 °F (60 °C) BTU/hr (kW) 135,800 (39.8) 135,800 (39.8)
Min. input rate 180/79 (82/26 °C) BTU/hr (kW) 36,000 (10.5) 46,400 (13.6)
Min. output rate 104/86 °F (40/30 °C) BTU/hr (kW) 35,500 (10.4) 46,400 (13.6)
Min. output rate 122/86 °F (50/30 °C) BTU/hr (kW) 35,100 (10.3) 46,100 (13.5)
Min. output rate 176/140 °F (80/60 °C) BTU/hr (kW) 31,700 (9.3) 42,000 (12.3)
Input/Output at elevation 2000 - 4500 feet ( 611 - 1372 metres)
Max. input rate 180/79 °F (82/26 °C) BTU/hr (kW) 136,440 (40.0) 139,402 (40.9)
Max. output rate 104/86 °F (40/30 °C) BTU/hr (kW) 123,750 (36.3) 129,250 (37.9)
Max. output rate 122/86 °F (50/30 °C) BTU/hr (kW) 123,750 (36.3) 129,250 (37.9)
Max. output rate 176/140 °F (80/60 °C) BTU/hr (kW) 120,960 (35.5) 126,336 (37.0)
Output rate domestic hot water (DHW) 113 °F (45 °C) BTU/hr (kW) 123,750 (36.3) 129,750 (37.9)
Output rate domestic hot water (DHW) 140 °F (60 °C) BTU/hr (kW) 122,220 (35.8) 127,652 (37.4)
Input/Output at elevation 4500 - 7000 feet (1373 - 2134 metres)
Max. input rate 180/79 °F (82/26 °C) BTU/hr (kW) 125,828 (36.9) 129,021 (37.8)
Max. output rate 104/86 °F (40/30 °C) BTU/hr (kW) 114,125 (33.5) 119,625 (35.1)
Max. output rate 122/86 °F (50/30 °C) BTU/hr (kW) 114,125 (33.5) 119,625 (35.1)
Max. output rate 176/140 °F (80/60 °C) BTU/hr (kW) 111,552 (32.7) 116,928 (34.3)
Output rate domestic hot water (DHW) 113 °F (45 °C) BTU/hr (kW) 114,125 (33.5) 119,625 (35.1)
Output rate domestic hot water (DHW) 140 °F (60 °C) BTU/hr (kW) 112,714 (33.0) 118,148 (34.6)
Gas connection value
Natural gas - H
s
= 1,010 BTU/ft
3
(37.3 MJ/m
3
)ft
3
/hr (m
3
/h) 149 (4.2) -
Liquid Propane Gas - HD-S = 2,500 BTU/ft
3
(93.1 MJ/m
3
)ft
3
/hr (m
3
/h) - 59 (1.7)
Permissible gas inlet 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 flow rate (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)
Flue gas
Flue gas mass flow at maximum/minimum nominal output gps 18.0/4.5 17.5/5.6
Flue gas temperature 176/140 °F (80/60 °C) at max./min. nominal heat input °F ( °C) 171/135 (77/57) 171/135 (77/57)
Flue gas temperature 104/86 °F (40/30 °C) at max./min. nominal heat input °F ( °C) 133/91 (56/33) 133/91 (56/33)
CO
2
at maximum nominal output % 9.4 11.0
CO
2
at minimum nominal output % 8.6 10.4
Condensate
Maximum condensate quantity (t
R
= 86 °F (30 °C)) gph (i/h) 0.32 (1.2) 0.32 (1.2)
pH level approx. 4.8 4.8
General

Bosch KWB42-3 Specifications

General

Brand	Bosch
Model	KWB42-3
Category	Boiler
Language	English