Weishaupt thermo condens WTC 15-A, Installation And Operating Instructions Manual

Page: 38 / 94

38
5
5.6 Ratings measurement
The burner rating for nominal load has to be determined.
Proceed as follows:
• Gas quantity to operating volume V
·
B
• Conversion factor to standard volume f
• Gas quantity to standard volume V
·
N
• Burner rating Q
·
Br
Operating volume at gas meter V
·
B
Gas qty (m
3
)
[___]
V
·
B
= ------------------------------------ · 3600 = _____ · 3600 = [___]m
3
/h
M. time (sec.)
[___]
auf f
P
Baro.
+ P
Gas
273 [__] + [__] 273
f = ------------------------------ · --------------------------- = ---------------------- = -------------- [__]
1013 273 x t
Gas
1013 273 + [__]
or conversion factor to table
Standard volume V
N
V
·
N
= V
·
B
· f = [___] · [___] = [___] m
3
/h
Burner rating Q
·
Br
Q
·
Br
= V
·
N
· H
i,n
= [___] · [___] = [___] kW
Legend:
Q
·
Br
= Burner rating in kW
P
Baro.
= Barometric air pressure [ mbar ] to table
P
Gas
= Gas pressure at meter [ mbar ]
t
Gas
= Gas temperature at meter [ °C ]
H
i,n
= Calorific value [ kWh/m
3
]
V
·
B
= Operating volume [ m
3
/h ]
V
·
N
= Standard volume [ m
3
/h ]
f = Conversion factor operating/standard volume
Nominal load [___] m
3
/h Min. load [___] m
3
/h
Nominal load [___] m
3
/h Min.-Last [___] m
3
/h
Nominal load [___] m
3
/h Min.-Last [___] m
3
/h
Conversion factor to standard volume f
P
Baro.
+ P
Gas
273
[___] + [___]
273
f = ------------------------------ · --------------------------- = ------------------------------------ · ------------------------------ = [___]
1013 273 + t
Gas
1013 273 + [___]
The heating and DHW ratings (on versions -C and -W)
can be reduced.
Procedure see Ch. 6.3.3
Total pressure = P
Baro.
+ P
Gas
[ mbar ] = + = [ mbar ]
Average yearly air pressure P
Baro.
Average altitude of from 1 51 101 151 201 251 301 351 401 451 501 551 601 651 701
supply area to 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750
Average yearly air pressure mbar 1016 1013 1007 1001 995 989 983 977 971 965 959 953 947 942 936 930
950 956 962 967 973 979 985 991 997 1003 1009 1015 1021 1027 1033 1036
0 0.9378 0.9437 0.9497 0.9546 0.9605 0.9664 0.9724 0.9783 0.9842 0.9901 0.9961 1.0020 1.0079 1.0138 1.0197 1.0227
2 0.9310 0.9369 0.9427 0.9476 0.9535 0.9594 0.9653 0.9712 0.9770 0.9829 0.9888 0.9947 1.0006 1.0064 1.0123 1.0153
4 0.9243 0.9301 0.9359 0.9408 0.9466 0.9525 0.9583 0.9642 0.9700 0.9758 0.9817 0.9875 0.9933 0.9992 1.0050 1.0079
6 0.9176 0.9234 0.9292 0.9341 0.9399 0.9457 0.9514 0.9572 0.9630 0.9688 0.9746 0.9804 0.9862 0.9920 0.9978 1.0007
8 0.9111 0.9169 0.9226 0.9274 0.9332 0.9389 0.9447 0.9504 0.9562 0.9619 0.9677 0.9734 0.9792 0.9850 0.9907 0.9936
10 0.9047 0.9104 0.9161 0.9209 0.9266 0.9323 0.9380 0.9437 0.9494 0.9551 0.9609 0.9666 0.9723 0.9780 0.9837 0.9866
12 0.8983 0.9040 0.9097 0.9144 0.9201 0.9257 0.9314 0.9371 0.9428 0.9484 0.9541 0.9598 0.9655 0.9711 0.9768 0.9796
14 0.8921 0.8977 0.9033 0.9080 0.9137 0.9193 0.9249 0.9306 0.9362 0.9418 0.9475 0.9531 0.9587 0.9644 0.9700 0.9728
16 0.8859 0.8915 0.8971 0.9017 0.9073 0.9129 0.9185 0.9241 0.9297 0.9353 0.9409 0.9465 0.9521 0.9577 0.9633 0.9661
18 0.8798 0.8854 0.8909 0.8955 0.9011 0.9067 0.9122 0.9178 0.9233 0.9289 0.9344 0.9400 0.9456 0.9511 0.9567 0.9594
20 0.8738 0.8793 0.8848 0.8894 0.8949 0.9005 0.9060 0.9115 0.9170 0.9225 0.9281 0.9336 0.9391 0.9446 0.9501 0.9529
22 0.8679 0.8734 0.8788 0.8834 0.8889 0.8944 0.8998 0.9053 0.9108 0.9163 0.9218 0.9273 0.9327 0.9382 0.9437 0.9464
24 0.8620 0.8675 0.8729 0.8775 0.8829 0.8883 0.8938 0.8992 0.9047 0.9101 0.9156 0.9210 0.9265 0.9319 0.9373 0.9401
Gas temperature t
G
[ °
C
]
1 mbar = 1 hPa = 10.20 mm WG 1 mm WG = 0.0981 mbar = 0.0981 hPa
➞
Determination of conversion factor f