Part number 550-100-131/0120
– 100 –
®
gas
-
fired
water
boiler
— 220/299/300/399
Boiler Manual
Figure 96
Firing rates and corresponding blower speeds (low fire,
ignition, and high fire) — for altitudes up to 5,500 feet and
high altitude (above 5,500 feet).
Annual startup
(continued)
Check blower speeds
1. For installations at altitudes above 2,000 feet,
make sure the control is set up for correct altitude
in the boiler setup menu. The Control automati-
cally adjusts low fire and ignition rates to com-
pensate for high altitude conditions.
2. Use the Control display to navigate to DIAGNOS-
TICS/Manual test mode (see Figure 74, page 75 for
navigation instructions and Figure 80, page 80 for
the complete Diagnostics menus).
3. Set the firing rate to MINIMUM (low fire).
4. Write down the blower RPM value shown and
compare to the value in Figure 96. The value
should no less than the “Minimum setting” and no
higher than the Ignition “Factory setting” listed.
Low fire rate (% of Max Rate) is adjusted in the
“Priority” setup menu.
5. Set the firing rate to MEDIUM (ignition rate).
6. Write down the blower RPM value. It should be
within 200 RPM of the value listed in Figure 96.
7. Set the firing rate to MAXIMUM (high fire).
8. Write down the blower RPM value. It should be
within 200 RPM of the value given in Figure 96.
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 affect AFUE
ratings.
Check flue gas temperature
1. Set the boiler to high fire. Then adjust the Control
display to view flue gas temperature and boiler
return temperature.
2. The flue gas temperature should be no more than
50°F higher than the boiler return temperature.
3. If the flue temperature is higher than this, shut
down the boiler, allow to cool, and follow the
procedure starting on page 111 to clean the heat
exchanger.
Model
EVG 220
EVG 299/300
EVG 399
Fuel
Type
%
RPM Btu/Hr
Note 1
%
RPM Btu/Hr
Note 1
%
RPM Btu/Hr
Note 1
Low fire
Factory
setting
NG 10
%
1,115 22,000
10
%
1,175 29,900
10
%
1,210 39,900
LP 10
%
1,100 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
%
1,165
to
1,482
22,000
11
%
to
16
%
1,192
to
1,469
29,900
11
%
to
18
%
1,247
to
1,645
39,900
Ignition
(“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
High fire
(adjust if desired to match maximum system load —
High fire % 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 fire 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.
