Bosch KWB42-3A Installation And Maintenance Instructions For Contractors

Information about the appliance
19
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
3.12 Technical data heating boiler KBR21-3
Table 5
Input / Output Unit NG LPG (Propane)
Max. input rate 180/79 °F (82/26 °C) BTU/hr (kW) 79,200 (23.2) 77,500 (22.7)
Max. output rate 104/86 °F (40/20 °C) BTU/hr (kW) 74,700 (21.9) 74,700 (21.9)
Max. output rate 122/86 °F (50/30 °C) BTU/hr (kW) 74,000 (21.7) 74,000 (21.7)
Max. output rate 176/140 °F (80/60 °C) BTU/hr (kW) 70,300 (20.6) 70,300 (20.6)
Max. input rate 180/79 °F (82/26 °C) BTU/hr (kW) 24,600 (7.2) 40,100 (11.7)
Max. output rate 104/86 °F (40/20 °C) BTU/hr (kW) 23,900 (7.0) 39,900 (11.7)
Max. output rate 122/86 °F (50/30 °C) BTU/hr (kW) 23,900 (7.0) 39,600 (11.6)
Max. output rate 176/140 °F (80/60 °C) BTU/hr (kW) 21,800 (8.4) 36,200 (10.6)
Gas connection value
Natural gas - H
s
=1,010 BTU/ft
3
(37.3MJ/m
3
)ft
3
/hr (m
3
/h) 78 (2.2) -
Liquid Propane Gas - HD-S = 2,500 BTU/ft
3
(37.3MJ/m
3
)ft
3
/hr (m
3
/h) - 31 (0.9)
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)
Flue gas
Flue gas mass flow at maximum/minimum nominal output gps 9.4/3.2 9.2/4.8
Flue gas temperature 176/140 °F (80/60 °C) at max./min. nominal output °F ( °C) 145/133 (63/56) 145/133 (63/56)
Flue gas temperature 104/86 °F (40/30 °C) at max./min. nominal output °F ( °C) 115/90 (46/32) 115/90 (46/32)
CO
2
at maximum nominal output % 9.4 11.0
CO
2
at minimum nominal output % 8.6 10.4
Condensate
Maximum condensate quality (t
R
= 86 °F (30 °C)) gph (l/h) 0.32 (1.2) 0.32 (1.2)
pH level approx. 4.8 4.8
General
Voltage Vac 120 120
Frequency Hz 60 60
Max. power consumption (central heating mode) W 205 205
Max. power consumption (standby mode) W <6 <6
Sound pressure level dB (A) ≤33 ≤33
Max. supply temperature °F ( °C) 190 (88) 190 (88)
Max. permissible operating pressure (P
MS
) heating psi (bar) 30 (2.07) 30 (2.07)
Permissible ambient temperature °F ( °C) 32-122 (0-50) 32-122 (0-50)
Nominal water capacity (heating) Gall (L) 0.925 (3.5) 0.925 (3.5)
Weight (without packaging) lbs (kg) 150 (68) 150 (68)
Maximum overall dimensions W x H x D inch (mm) 21
15
/
16
x 41
1
/
4
x 21
7
/
8
557 x 1048 x 555
21
15
/
16
x 41
1
/
4
x 21
7
/
8
557 x 1048 x 555

Bosch KWB42-3A Specifications

General

Brand	Bosch
Model	KWB42-3A
Category	Boiler
Language	English