71
MAINTENANCE
d. Disconnect both condensate hoses from the top
of the condensate collector.
e. Disconnect the float switch wires from the wiring
harness.
f. Lift the front (condensate collector) container
above the level of the other container to empty
some condensate from the system.
g. Disconnect the condensate drain connection
from the rear of the boiler and remove the
containers from the boiler.
2. Cleaning the Containers:
a. Dump the contents of the containers and flush
them with water.
b. Be sure that there is free movement of liquid
between the containers through the bottom port.
c. Check for leaks at all of the hose clamps.
3. Re-installing the Containers:
a. Place the tanks in position and attach both wing
nuts.
b. Connect the hoses to the top of the condensate
collector.
c. Attach the drain hose to the outlet of the system.
d. Connect the wires to the blocked condensate
float switch in the lid of the condensate collector.
e. Fill the condensate neutralizer container with 1-2
inches of neutralizing media.
4. Restarting the Boiler:
a. Open the manual gas valve at the rear of the
boiler.
b. Turn both burner service switches on.
c. Observe the boiler function to make sure you see
condensate flow.
d. If no flow of condensate is evident, repeat this
procedure.
5. If the problem persists it is possible that there is a
problem with material deposits in the heat
exchanger. Follow the Combustion Chamber Coil
Cleaning Instructions in this section.
E. COMBUSTION CHAMBER COIL
CLEANING INSTRUCTIONS
Before beginning this procedure, you must have on
hand the following items:
– a nylon or brass brush (not steel)
– “Rydlyme” (recommended for best results)
(available online www.rydlyme.com) or “CLR”
(available at most hardware stores)
1. Shut the boiler down and access the heat exchanger
using the following steps:
a. Close the manual gas shutoff valve and wait for
the unit to be cool to the touch.
b. Disconnect the condensate piping from the outside
connections (not from the P
UREFIRE
®
side) so the
flow can be observed.
c. Disconnect compression nut on gas valve inlet
and disconnect the gas valve electrical connector.
d. Remove the six 10 mm nuts from the burner
plate assembly. Disconnect wire leads to the
spark igniter and flame sensor. Disconnect two
Molex plugs from blower motor.
e. Pull the entire burner plate towards you to access
the heat exchanger coils.
2. Using a spray bottle filled with the recommended
product “Rydlyme” or “CLR”, spray liberally on the
coils, making sure the solution penetrates and
funnels down through the condensate hose. If the
condensate hose is blocked, let the chemical
penetrate for at least 15 minutes or until it drains.
3. Use the nylon or brass brush (do not use steel) and
scrub coils to remove any buildup, then vacuum the
debris from the coils.
4. Spray coils with clear water, making sure to confine
the spray to the area being cleaned (try to avoid
wetting the back ceramic wall of the unit). Flush the
combustion chamber with fresh water. At this point,
the P
UREFIRE
®
should be ready to power back up.
5. Reinstall the burner plate assembly using the
following steps:
a. Inspect the inside of the heat exchanger for dirt
and debris.
b. Install the burner plate assembly and replace the
six 10 mm nuts.
c. Reconnect the wire leads to the spark igniter,
flame sensor and gas valve. (Be sure that the
spark igniter is connected to the lead with the
large insulated connection boot.) Reconnect two
Molex plugs on blower motor.
d. Connect the compression nut on the gas valve
inlet and reattach the gas valve electrical
connector.
e. Reset thermostats. (IMPORTANT: BE SURE
THAT THE VENT CONNECTION IS NOT
BLOCKED.)
f. Turn the power to the P
UREFIRE
®
on. Observe the
display module to assure proper operation.
g. Initiate a call for heat** and observe the
condensate flow.
It is extremely important to check for leaks when
reconnecting the gas valve. Failure to do so may
result in severe personal injury, death or major
property damage.
WARNING
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