Check Ignition Wiring; Check All Boiler Wiring; Check Control Settings; Perform Startup And Checks - Weil-McLain Evergreen EVG 70 Manual

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Annual startup
Che ck ignition wiring
1. Check ignition cable electrical resistance. A good cable will
have resistance between 950 and 1050 ohms. Replace if not
acceptable.
2. Inspect boiler ground wire from heat exchanger access cover
to ground terminal screw.
3. Verify all wiring is in good condition and securely attached.
4. Check ground continuity of wiring using continuity meter.
5. Replace ground wires if results are not satisfactory.
Check all boil er wiring
1. Inspect all boiler wiring, making sure wires are in good
condition and securely attached.
2. Verify that all connectors are securely inserted.
Check control sett ings
1. Use the control display to navigate through all settings. Adjust
settings if necessary.
2. Check settings of external limit controls (if any) and adjust
if necessary. Adjust as needed to accommodate the system
design.

Perform startup and checks

1. Start boiler and perform checks and tests specifi ed in this
manual.
2. Verify cold fi ll pressure is correct and that operating pressure
does not go too high. Adjust water pressure and expansion
tank charge pressure as necessary.
3. Complete the check-out procedure on page 99 .
Check low water c utoff service light
1. If the low water cutoff amber LED is on, the device requires
service. Follow the low water cutoff manufacturer's
instructions. (Shipped as standard equipment with all
Evergreen
® boilers).
Che ck burner fl ame
The boiler contains ceramic fi ber materials. Use care
when handling these materials per instructions on
page 101 of this manual. Failure to comply could
result in severe personal injury.
1. Inspect flame through observation window using the
procedure on page 94 .
2. If fl ame is unsatisfactory at either high fi re or low fi re, check
combustion values. If combustion is properly adjusted, turn
off boiler and allow boiler to cool down. Then remove burner
and clean it thoroughly using a vacuum cleaner or compressed
air. Do not use compressed air to clean burner if performed
inside a building.
3. To access the burner, remove the heat exchanger cover plate
following the procedure beginning on pages 117 or page 120
or page 123 .
4. If replacing the burner, ensure the burner gasket is in good
condition and correctly positioned. Follow all instructions on
page 117 or 103 to reinstall all components.
5. Restart the boiler.
6. Inspect the flame at high and low fire. If flame is still
not acceptable, check combustion values. If combustion
is properly adjusted, obtain a replacement burner from
Weil-McLain.
104
as-fired water boiler —
(continued)
Boiler Manual
70/110/155
Check fl ame s ignal
1. Navigate to Diagnostics/Inputs on the control display
(see Figure 69, page 79 for navigation instructions and
Figure 75, page 84 for the complete Diagnostics menus).
2. The fl ame signal value must be at least 75 for a EVG 70, or at
least 100 for a EVG 100, and at least 160 for the EVG 155. If
the fl ame signal drops below this level, the EVG control will
attempt to correct by increasing the blower speed to increase
fl ame signal.
Figure 89 Flame signal shutdown values
Model Shutdown
EVG fl ame signal
70 50
70 HA 50
110 80
110 HA 80
3. A low fl ame signal may indicate a fouled ignitor or damaged
ignitor insulation.
a. See "Inspect ignition electrode," page 103 to remove and
inspect the ignitor.
b. If required, clean the igniter as instructed.
c. If cleaning the ignitor does not improve, ground wiring is
in good condition, and ground continuity is satisfactory,
replace the ignitor.
4. If fl ame signal still remains low:
a. Inspect the vent and air piping.
b. Check combustion values.
c. Then inspect the heat exchanger, following the procedures
given in this manual for removal and reinstallation of the
heat exchanger cover plate and other boiler components
(see page 117 ).
d. Clean the exchanger as described in this manual if necessary.
Check b lower 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 control automatically adjusts low fi re and ignition rates
to compensate for high altitude conditions.
2. For installations below 5,500 feet, high altitude should NOT
be enabled.
3. U s e t h e c o n t r o l d i s p l a y t o n a v i g a t e t o
DIAGNOSTICS/Manual test mode (see Figure 69, page 79 for
navigation instructions and Figure 75, page 84 for the complete
Diagnostics menus).
4. Set the fi ring rate to LOW (low fi re).
5. Write down the blower RPM value shown and compare to
the value in Figure 90 . The value should be no less than the
"Minimum setting" and no higher than the Ignition "Factory
setting" listed. Low fi re rate (and corresponding blower speed)
is adjusted in the boiler setup menu.
6. Set the fi ring rate to MED (ignition rate).
7. Write down the blower RPM value. It should be within 200
RPM of the value listed in Figure 90 .
8. Set the fi ring rate to HIGH (high fi re).
Model Shutdown
EVG fl ame signal
155 150
155HA 150
NOTE: "HA" means high altitude,
5500 feet or more above sea level.
Part number 550-100-191/0917