Weil-McLain Evergreen EVG 110, Manual

Page: 94 / 144

Startup — fi nal checks
(continued)
Final checks before starting boiler
❏
Read the instructions to adjust and set up the control.
❏
Verify that the boiler model is set correctly in the control, and
that it displays correctly.
❏
Verify that the boiler and system are full of water and all
system components are correctly set for operation.
❏
Verify that condensate trap is fi lled with water.
❏
Verify electrical connections are correct and securely attached.
❏
Inspect vent piping and air piping for signs of deterioration
from corrosion, physical damage or sagging. Verify air piping
and vent piping are intact and correctly installed per this
manual.
To start the boiler
1. Apply power to the boiler via the service switch.
2. Follow the Operating Instructions, Figure 82, page 95 .
3. The control display will show installed sensors when fi rst
powered. Make sure the right sensors are detected and the
correct boiler model is identifi ed. If not, determine the cause
and correct before proceeding.
If boiler does not start correctly
1. Check for loose connections, blown fuse or service switch off?
2. Are external limit controls (if used) open? Is boiler water
temperature above 200°F?
3. Are thermostats set below room temperature?
4. Is gas turned on at meter and boiler?
5. Is incoming gas pressure less than the minimum values given
on page 21 ?
6. Are EVG control settings correct for the application?
7. Is the warm weather shutdown activated?
8. If none of the above corrects the problem, refer to
Troubleshooting, beginning on page 107 .
❏
Check system and boiler
❏
Check water piping
1. Check system piping for leaks. If found, shut down boiler and
repair immediately. (See WARNING on page 92 regarding
failure to repair leaks.)
2. Vent any remaining air from system using manual vents. Air
in the system will interfere with circulation and cause heat
distribution problems and noise.
❏
Check vent piping and air piping
1. Check for gas-tight seal at every connection and seam of air
piping and vent piping.
Venting system must be sealed gas-tight to prevent
fl ue gas spillage and carbon monoxide emissions
which will result in severe personal injury or death.
❏
Check gas piping
1. Check around the boiler and inside the boiler jacket for gas
odor following the procedure of page 53 of this manual.
If you discover evidence of any gas leak, shut down
the boiler at once. Find the leak source with bubble
test and repair immediately. Do not start boiler
again until corrected. Failure to comply could
result in severe personal injury, death or substantial
property damage.
❏
Propane boilers — verify conversion
1. Verify boiler has been converted for propane. See page 15
for EVG 70, page 17 for EVG 110 or page 19 for EVG 155.
DO NOT attempt to
measure gas valve outlet
pressure
DO NOT adjust or attempt to measure gas valve outlet
pressure. The gas valve is factory-set for the correct outlet
pressure. This setting is suitable for natural gas and propane,
requiring no fi eld adjustment.
Attempting to alter or measure the gas valve outlet pressure
could result in damage to the valve, causing potential severe
personal injury, death or substantial property damage.
Evergreen® boilers are shipped ready to operate on natural
gas ONLY.
Failure to comply could result in severe personal injury,
death or substantial property damage.
❏
Check fl ame & combustion with instruments
1. Initiate a call for heat on one of the thermostat inputs.
2. Access the EVG control installer menus by pressing and
holding the UP and DOWN arrow keys for seven seconds.
3. Make sure the Max fi ring rate is set to the maximum given
in Figure 90, page 105 . If not, adjust as necessary. Then
navigate to DIAGNOSTICS — Manual test mode (see
Figure 76, page 85 ) and force the fi ring rate to HIGH (high
fi re).
4. Look at the fl ame through the fl ame inspection window.
The high fi re fl ame should be blue and should be stable. The
burner surface should be covered with orange dots.
5.
Insert combustion analyzer probe
— Remove the
fl ue temperature sensor from the fl ue pipe and insert a
combustion test probe.
6. Test for CO
2
(or O
2
) and for CO. The CO
2
values must comply
with Figure 86, page 98 . If results are acceptable, proceed to
step 7.
IF NOT
, follow the instructions under “Throttle Screw
CONTINUED AFTER NEXT PAGE
Part number 550-100-191/0917
94
®
g
as-fired water boiler —
70/110/155
Boiler Manual