LP-551 Rev. 3.9.16
55
to the area being cleaned. Flush the combustion chamber with
fresh water until it runs clear from the condensate reservoir.
At this point, the boiler should be ready to be reassembled.
a. Inspect gaskets.
b. Reinstall the burner assembly
c. Replace and tighten the six (6) 10MM nuts to the burner
plate using staggered tightening sequence. (See detail.)
d. Reconnect all wiring connections
e. Inspect the gas valve. Ensure the O-ring is in place.
f. Replace the four (4) screws on the aluminum connector
on the gas valve. Turn the gas back on. (IMPORTANT:
CHECK FOR GAS LEAKS!)
g. Turn boiler power back on and create a heat demand.
When boiler is lit observe condensate flow from the boiler.
Be sure the boiler is operating properly.
h. Reconnect the condensate piping to the outside
condensate connection.
Do not use solvents to clean any of the burner components.
The components could be damaged, resulting in unreliable or
unsafe boiler operation, substantial property damage, severe
personal injury, or death.
Figure 28 - Heat Exchanger Detail
C. Cleaning Water Side of Heat Exchanger
1. Make sure power is
turned off to the boiler.
Run water through the
hot water system to
ensure it is below room
temperature.
2. Close isolation valves
on the return and
supply connections to
the boilers as shown
in the piping diagrams
in this manual. Slowly
open the ball valves and
release pressure into a
bucket. Once pressure
is released, connect a
hose to the water line
to flush the boiler. Scale
removing solution may
be used, but must be
approved for use with
stainless steel and FDA approved for use in a potable water
D. Maintaining the Condensate System
When servicing is complete, make sure the condensate collector
cap is replaced securely. Failure to do so will cause venting
issues that will result in serious injury or death.
The condensate trap assembly MUST BE PROPERLY INSTALLED
according to these instructions when operating the boiler.
Operating the boiler without the condensate trap assembly will
cause flue gases to leak and result in serious personal injury or
death.
1. Ensure the boiler is powered off and has had time to cool.
2. Remove the hose clamp attaching the condensate trap to
the condensate hose from the heat exchanger. Remove the
clear plastic hose from the hose barb. Remove the condensate
hose clamp to detach the condensate trap from the drain tube.
Remove the condensate trap from the boiler.
3. Remove the bottom cap from the condensate trap.
4. Flush trap with fresh water to remove debris from the trap.
NOTE:
Ensure the float moves freely within the trap. If the float
does not move, DO NOT reinstall the trap.
5. When the condensate trap is sufficiently clean, reinstall the
bottom cap on the trap.
NOTE:
Ensure all parts shown in Figure 29, Condensate Detail,
are installed with the condensate trap. If any parts are missing,
DO NOT reinstall the trap. Replace the entire assembly.
Do not install the condensate assembly if a component is lost
or missing. Replace the entire assembly. Failure to follow this
warning could result in property damage, serious personal
injury, or death.
system.
3. Thoroughly flush the heat exchanger before commissioning
the unit back in service.
6. Fill the condensate trap with fresh water prior to reassembly
on the boiler.
7. Install the condensate trap on the condensate hose from
the heat exchanger. Use the hose clamp to secure the trap.
Attach the clear plastic hose onto the hose barb. Reinstall the
condensate hose clamp to detach the condensate trap from the
drain tube.
Do not operate the boiler without the clear hose attached
from the hose barb to the pressure switch. Failure to follow
this warning could result in property damage, serious personal
injury, or death.
8. If a condensate neutralizer kit is installed with the boiler,
check the assembly when cleaning the condensate trap, and
replenish the limestone chips if necessary. When replacing
limestone chips, take care to ensure chips are no smaller than
½” to avoid blockage in condensate piping (for piping details,
refer to condensate neutralizer installation instruction.)
9. Check condensate piping for sagging and/or leakage. Repair
any sags or leaks before restoring power to the boiler.
Summary of Contents for EP-220 VWH
Page 33: ...LP 551 Rev 3 9 16 33 Figure 24 Cascade Master and FollowerWiring ...
Page 34: ...LP 551 Rev 3 9 16 34 Figure 25 Internal Connection Diagram ...
Page 57: ...LP 551 Rev 3 9 16 57 Figure 30 Combustion System Replacement Parts 220kBTU Model ...
Page 58: ...LP 551 Rev 3 9 16 58 Figure 31 Combustion System Replacement Parts 299 399kBTU Models ...
Page 59: ...LP 551 Rev 3 9 16 59 Figure 32 Replacement Parts All Models ...
