Weil-McLain ECO 70 Manual page 88

TM -
G
AS FIRED WATER BOILER
Annual startup
Check blower speeds
1. For installations at altitudes above 5,500 feet, make
sure the control is set up for high altitude in the
boiler setup menu. The ECO control automatically
adjusts low fire and ignition rates to compensate for
high altitude conditions.
2. For installations below 5,500 feet, high altitude
should NOT be enabled.
3. Use the ECO control display to navigate to
DIAGNOSTICS/Manual test mode (see Fig-
ure 71, page 66 for navigation instructions and
Figure 80, page 72 for the complete Diagnostics
menus).
4. Set the firing rate to LOW (low fire).
5. Write down the blower RPM value shown and com-
pare to the value in Figure 92. The value should be
no less than the "Minimum setting" and no higher
than the Ignition "Factory setting" listed. Low fire
rate (and corresponding blower speed) is adjusted
in the boiler setup menu.
6. Set the firing rate to MED (ignition rate).
7. Write down the blower RPM value. It should be
within 200 RPM of the value listed in Figure 92.
8. Set the firing rate to HIGH (high fire).
9. Write down the blower RPM value. It should be
within 200 RPM of the value given in Figure 92.
10. If any of the values are outside the ranges listed in
the previous steps, contact the factory for technical
assistance.
Minimum and maximum blower speeds
can be adjusted within limits, but chang-
ing speeds will affect AFUE ratings.
Check flue gas temperature
1. Set the boiler to high fire. Then adjust the ECO
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 100 to clean the heat
exchanger.
88
— Boiler Manual
(continued)
Model
Minimum
setting
Factory
setting
High
altitude
Factory
setting
High
altitude
(adjust if desired to match maximum system load —
Factory
setting
Maximum
setting
Note 1 — The boiler will automatically derate the BTU values listed in
this table by 4% per 1,000 feet above sea level.
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)
70 110
% RPM Btu/Hr % RPM
Note 1
Low fire
20 1,100 14,000 20 1,400 22,000
20 1,100 14,000 20 1,400 22,000
33 1,675 23,000 33 2,150 37,000
Ignition
("Medium" setting in manual test mode)
47 3,200 32,900 47 2,800 51,700
62 3,500 43,400 62 3,500 68,200
High fire
High fire % rate = Max heat load / Boiler output)
(adjusting speed will affect boiler AFUE rating)
96 4,150 67,200 96 5,450 105,600
100 4,300 70,000 100 5,650 110,000
155
Btu/Hr % RPM Btu/Hr
Note 1 Note 1
18 1,300 28,000
18 1,300 28,000
33 2,100 52,000
47 2,800 72,850
61 3,500 94,550
96 5,300 148,800
100 5,500 155,000
Part number 550-142-122/0513