9
LP-543 Rev. 12.15.15
Read the pressure gauges to ensure the system is pressurized. Check the CH loop pressure gauge. Normal CH pressure will
range from 15 – 30 psi. Boiler will not operate if pressure is lower than 15 psi.
Lift the relief valve top lever slightly, allowing water to relieve through the valve and discharge piping.
If water flows freely, release the lever on the pressure relief valve and allow the valve to seat. Watch the end of the relief valve
discharge pipe to ensure that the valve does not weep after the line has had time to drain. If the valve weeps, lift the lever
again to attempt to clean the valve seat. If the valve does not properly seat and continues to weep, contact a qualified service
technician to inspect the valve and system.
Repeat the process on the other valve.
If water does not flow from the valve when you completely lift the lever, the valve or discharge line may be blocked.
Immediately shut the boiler down per instructions on page 2 and call a qualified service technician to inspect the valve and
system.
D. ANNUAL MAINTENANCE – ONLY TO BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN
Flushing the Boiler
Flushing the boiler heat exchanger and CH loop is a complicated procedure that should only be performed by a qualified service
technician.
NOTE: Improper maintenance WILL VOID boiler warranty.
PART 4 – TROUBLESHOOTING
To save time and money, review the following initial diagnostic steps before calling for service.
No electrical power
to the boiler
1. Is the plug on the power supply cord unplugged
from the electrical outlet?
2. Is electrical panel’s 10 Amp circuit breaker tripped?
3. Is the fuse on the circuit board good?
4. Is there a power outage to the home?
1. Reset the plug.
2. Reset the circuit breaker.
3. If the display panel is blank, unplug the unit or
contact an authorized service technician.
4. Contact the power company.
A fan can be heard
even when the unit is
not operating.
1. The fan continues to operate after the burner shuts
off to clear the exhaust vent of combustion gases.
2. The fan may run to help prevent freezing.
1. This is normal operation – no action is required.
2. Protect the boiler from freezing temperatures or
shut off and drain the unit.
White “smoke” can
be seen coming out
of the exterior
exhaust gas vent.
Depending on the outside temperature, water vapor
can be produced as the exhaust is vented.
This is normal operation – no action is required.
Is the indirect water temperature set too low?
Adjust the temperature setting.
Domestic hot water
is too hot
Is the indirect water temperature set too high?
Adjust the temperature setting.
Is the CH temperature set too low?
Adjust the temperature setting.
Table 2 – Troubleshooting Chart
This boiler is equipped with a blocked vent shutoff system. If Error Codes Er:20 or Er:29 occur, turn off the gas valve at the manual
shutoff. Check the vent terminations for obstructions. If no obstructions are found, reset the boiler by pressing the power button. If the
error continues to occur, call a qualified service technician or the gas supplier to check the boiler. Failure to follow these instructions
could result in property damage, personal injury, or death.
Er:80 will occur if there is no water in the boiler. Ensure the boiler is full of water and purged of excess air. Then manually reset the
boiler by pressing the power button. If the error continues to occur, call a qualified service technician. Failure to do so could result in
property damage.
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