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Part number 550-100-211/0122
– 100 –
Figure96 Firing rates and corresponding blower speeds (low re,
ignition, and high re) — for altitudes up to 5,500 feet and
high altitude (above 5,500 feet).
(continued)
1. For installations at altitudes above 2,000 feet,
make sure the control is set up for correct altitude
in the boiler setup menu. e Control automati-
cally adjusts low re and ignition rates to com-
pensate for high altitude conditions.
2. Use the Control display to navigate to DIAGNOS-
TICS/Manual test mode (see Figure74,page75
for navigation instructions and Figure80,page80
for the complete Diagnostics menus).
3. Set the ring rate to MINIMUM (low re).
4. Write down the blower RPM value shown and
compare to the value in Figure96. e value
should no less than the “Minimum setting” and no
higher than the Ignition “Factory setting” listed.
Low re rate (% of Max Rate) is adjusted in the
“Priority” setup menu.
5. Set the ring rate to MEDIUM (ignition rate).
6. Write down the blower RPM value. It should be
within 200 RPM of the value listed in Figure96.
7. Set the ring rate to MAXIMUM (high re).
8. Write down the blower RPM value. It should be
within 200 RPM of the value given in Figure96.
9. If any of the values are outside the ranges listed in
the previous steps, contact the factory for techni-
cal assistance.
Minimum and maximum blower
speeds can be adjusted within limits,
but changing speeds will aect AFUE
ratings.
1. Set the boiler to high re. en adjust the Control
display to view ue gas temperature and boiler
return temperature.
2. e ue gas temperature should be no more than
50°F higher than the boiler return temperature.
3. If the ue temperature is higher than this, shut
down the boiler, allow to cool, and follow the
procedure starting on page111 to clean the heat
exchanger.
Model EVG 220 EVG299/300 EVG 399
Fuel
Type
% RPM Btu/Hr
Note 1
% RPM Btu/Hr
Note 1
% RPM Btu/Hr
Note 1
Factory
setting
NG
10
%
1,115 22,000
10
%
1,175 29,900
10
%
1,210 39,900
LP
10
%
1,250 22,000
10
%
1,145 29,900
10
%
1,150 39,900
High
altitude
NG
11%
to
19
%
1,190
to
1,587
22,000
11
%
to
18
%
1,235
to
1,601
29,900
11
%
to
18
%
1,297
to
1,695
39,900
LP
11
%
to
18
%
1,315
to
1,632
22,000
11
%
to
16
%
1,192
to
1,469
29,900
11
%
to
18
%
1,247
to
1,645
39,900
(“Medium” setting in manual test mode)
Factory
setting
NG
43
%
3,000 94,550 38% 2,800 113,600 39% 3,150 156,300
LP
43
%
2,850 94,550 38% 2,640 113,600 39% 3,000 156,300
High
altitude
NG 57% 3,830
will
vary
51% 3,540
will
vary
52% 4,030
will
vary
LP 57% 3,620
will
vary
50% 3,330
will
vary
52% 3,840
will
vary
(adjust if desired to match maximum system load —
High re % rate = Max heat load / Boiler output)
(adjusting speed will affect boiler AFUE rating)
Factory
setting
NG
96
%
6,030 211,200
96
%
6,100 287,040
96
%
6,930 383,040
LP
96
%
5,660 211,200
96
%
5,800 287,040
96
%
6,600 383,040
Maximum
setting
NG
100
%
6,260 220,000
100
%
6,325 299,000
100
%
7,200 399,000
LP
100
%
5,875 220,000
100
%
6,020 299,000
100
%
6,850 399,000
Note 1 — The boiler will automatically derate the Btu values listed in this
table by 4% per 1,000 feet above sea level.
Low re high altitude rpm’s change starting at 2,500 feet. The rpm’s will
increase from the low value to the high value (11,000 feet) in a linear
fashion.
Ignition high altitude rpm’s change at 5,500 feet.
220 /29 9/3 00 /39 9
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