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Appendix 16
89
We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
16.3 Technical specifications
General specifications Unit Appliance cap.
24 kW
Appliance cap.
30 kW
Appliance cap.
45 kW
Appliance cap.
60 kW
Gas category Natural gas
Natural gas Natural gas Natural gas
Rated thermal load for Natural gas btu/hr 25,700 – 84,800 31,800 – 106,000 48,100 – 160,900 64,400 – 198,800
Rated heating capacity for heating curve 176/140 °F
(80 – 60 °C)
btu/hr 22,700 – 75,200 28,100 – 91,500 42,500 – 142,000 56,800 176,300
Rated heating capacity for heating curve 122/86 °F
(50 – 130 °C)
btu/hr 25,300 – 83,300 30,700 – 102,400 47,200 – 158,000 63.200 – 196,600
Appliance efficiency rating max. capacity for
heating curve 176/140 °F (80 – 60 °C)
%88888888
Appliance efficiency rating max. capacity for
heating curve 122/86 °F (50 – 130 °C)
%97979797
CSA output btu/hr 76,300 95,400 144,800 178,900
Heating
Max. flow temperature °F (°C) 194 (90) 194 (90) 194 (90) 194 (90)
Heater water temperature °F (°C) 86 – 190 (30 –
90), can be set on
BC10 basic
controller
86 – 190 (30 –
90), can be set on
BC10 basic con-
troller
86 – 190 (30 –
90), can be set on
BC10 basic
controller
86 – 190 (30 –
90), can be set on
BC10 basic
controller
Max. operating overpressure of appliance psi (bar) 43.5 (3) 43.5 (3) 58 (4) 58 (4)
Heat exchanger heating circuit volume gallons (l) 0.7 (2.5) 0.7 (2.5) 1.0 (3.6) 1.3 (4.7)
Pipe connections
Gas connection inch ¾” NPT ¾” NPT ¾” NPT ¾” NPT
Heating system water connection inch (mm) 1.1” NPT (28) 1.1” NPT (28) 1.1” NPT (28) 1.1” NPT (28)
Condensate water connection inch (mm) Ø 1.3” (Ø 32) Ø 1.3” (Ø 32) Ø 1.3” (Ø 32) Ø 1.3” (Ø 32)
Flue gas values
Condensate water quantity for natural gas G20,
104/86 °F (40/30 °C)
gallons
per hour
2.6 3.3 4.7 7.1
pH value condensate water pH approx. 4.1 approx. 4.1 approx. 4.1 approx. 4.1
Flue gas mass flow rate at full load g/s 10.0 12.6 19.4 25.9
Flue gas temperature 176/140 °F (80/60 °C), full load °F (°C) 150 (66) 167 (75) 150 (66) 150 (66)
Flue gas temperature 176/140 °F (80/60 °C), partial load °F (°C) 135 (57) 137 (58) 135 (57) 135 (57)
Flue gas temperature 122/86 °F (50/30 °C), full load °F (°C) 113 (45) 118 (48) 96 (36) 96 (36)
Flue gas temperature 122/86 °F (50/30 °C), partial load °F (°C) 91 (33) 91 (33) 91 (33) 91 (33)
CO
2
content, full load, natural gas G20 % 9.2 9.2 9.3 9.3
CO
2
content, full load, LPG G31, propane % 10.0 10.0 10.0 10.0
Standard emission factor CO mg/kWh d 15 d 15
1
d 15 d 15
Standard emissions factor NO
x
mg/kWh d 20 d 20
1
d 20 d 20
Free fan unit feed pressure inch W.C.
(Pa)
up to 0.023
(up to 60)
up to 0.039
(up to 100)
up to 0.054
(up to 140)
up to 0.054
(up to 140)
Flue gas connection
Ø Flue system, dependent on the air in the room inch (mm) 3 (80) 3 (80) 3 (80) 3 (80)
Ø Flue system, independent of the air in the room inch (mm) 3/3 (80/80)
parallel
3/3 (80/80)
parallel
3/3 (80/80)
parallel
3/3 (80/80)
parallel
Electric data
main voltage V, Hz 120, 60 120, 60 120, 60 120, 60
Fuses amps 5 amps 120V
slow blow
5 amps 120V
slow blow
5 amps 120V
slow blow
5 amps 120V
slow blow
Electrical protection rating IP X4D IP X4D IP X4D IP X4D
Electrical power consumption, at full load W 96 117 64 82
Electrical power consumption, at partial load W 22 22 20 22
Appliance dimensions and weight
Height × Width × Depth inch
(mm)
28 × 22 × 18.7
(712 x 560 x 475)
28 × 22 × 18.7
(712 x 560 x 475)
28 × 35.4 × 18.7
(712 x 900 x 475)
28 × 35.4 × 18.7
(712 x 900 x 475)
Weight lbs (kg) 110 (50) 110 (50) 143 (65) 158 (72)
Table 16 Technical specifications
1
If the heating capacity is limited to max. 80% (L80).
89


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