Navien LCB700-21RS, Installation & Operation Manual

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10 About the Boiler
Product Datasheet On Energy Consumption
The following product data complies with the requirements of EU Regulations No. 811/2013 and No. 812/2013 as supplement to the
Directive 2010/30/EU.
Product data Symbol Unit
LCB700
21RS, RSX
21LS, LSX
21LC, LCX
28RS, RSX
28LS, LSX
28LC, LCX
36RS, RSX
36LS, LSX
36LC, LCX
Condensing boiler - - Yes Yes Yes
Low-temperature** boiler - - No No No
B1 boiler - - No No No
Combination heater (LC, LCX models) - - Yes Yes Yes
Rated heat output Prated
੪
21 28 36
Seasonal space heating energy efficiency η
S
% 93 93 93
Energy efficiency class - - A A A
Useful heat output
At rated heat output and high temperature regime* P
4
੪
21.23 28.38 36.51
At 30 % of rated heat output and low temperature regime** P
1
੪
6.75 8.87 11.53
Useful efficiency
At rated heat output and high temperature regime* η
4
% 92.13 92.48 92.27
At 30 % of rated heat output and low temperature regime** η
1
% 97.63 97.56 97.91
Auxiliary electricity consumption
At full load elmax
੪
0.0935 0.1013 0.1242
At part load elmin
੪
0.0281 0.0268 0.0328
In standby mode P
SB
੪
0.0016 0.0018 0.0017
Other items
Standby heat loss P
stby
੪
0.0731 0.0843 0.0731
Ignition burner power consumption P
ign
੪
0 0 0
Emissions of nitrogen oxides (only gas or oil fired) NO
x
਺੪K
57.2 62.5 63.2
Sound power level (External Model) L
WA
dB 49 52 56
Additional data for combination heaters
Declared load profile - - XL XL XL
Daily electricity consumption Qelec
੪K
Annual electricity consumption AFC
੪K
Daily fuel consumption Qfuel
੪K
Annual fuel consumption AFC GJ
Water heating energy efficiency ηwh %
Water heating energy efficiency class - - B B B
* High-temperature regime means 60 °C return temperature at heater inlet and 80°C feed temperature at heater outlet.
** Low temperature means for condensing boilers 30°C, for low-temperature boilers 37°C and for other heaters 50°C return temperature (at heater inlet).
Specific Precautions
Read the user’s information and installation manual before the application is assembled, installed or maintained.