7
Monthly
1. Check flue, vent, stack, or outlet dampers.
2. Test intake air pressure. (See Table Q in the I&O
Manual.) Replace the filter when the intake air
pressure increases by –0.5 in. WC from the read-
ing recorded on the start-up checklist.
3. Test high and low gas pressure interlocks (if
equipped). (See “Safety Inspection” in the I&O
Manual.)
Semi-Annually
1. Recalibrate all indicating and recording gauges.
2. Check flame failure detection system components.
3. Check firing rate control by checking the manifold
pressure. (See “Manifold Check” in the I&O
Manual.)
4. Check piping and wiring of all interlocks and shut-
off valves.
Annually
1. Test flame failure detection system and pilot turn-
down.
2. Test high limit and operating temperature. (See
“Post Start-Up Check” in the I&O Manual.)
3. Check flame sensor.
4. Conduct a combustion test at high and low fire.
Carbon dioxide should be 8.5 to 9.0% at full fire for
natural gas, and between 9.0 to 9.5% for propane
gas. Carbon monoxide should be <150 ppm.
5. Check valve coil for 60 cycle hum or buzz. Check
for leaks at all valve fittings using a soapy water
solution (while heater is operating). Test other
operating parts of all safety shut-off and control
valves and increase or decrease settings
(depending on the type of control) until the safety
circuit opens. Reset to original setting after each
device is tested.
6. Perform leakage test on gas valves.
7. Test air switch in accordance with manufacturer’s
instructions. (Turn panel switch to the “On” posi-
tion until blower is proven, then turn the switch to
“Off.”
8. Inspect and clean burner using shop air.
9. Combustion Chamber Coil Cleaning Instructions:
Before beginning this procedure, you must have
on hand the following items:
– a nylon, stainless steel or brass brush (not steel)
– “Rydlyme” (recommended for best results) or
“CLR”
– Gloves, eye protection
1. Shut down the XFyre Boiler by using the follow-
ing steps:
a. Close the gas valve, shut down the unit and wait
for the unit to be cool to the touch
b. Disconnect the condensate piping from the out-
side connection, (not from the XFyre Boiler side),
so the flow from condensate reservoir can be
observed.
c. Disconnect electrical connections from the gas
valve, spark electrode and flame rectification
probe and combustion blower.
d. Remove the (4) screws on the aluminum ¾”
NPT connector on the right side of the gas valve.
e. Disconnect the wiring connected to the combus-
tion blower motor.
f. Remove the (6) 10MM nuts from the burner plate
assembly .
g. Pull the entire burner plate assembly with blow-
er still attached towards you, while removing or
pushing aside any wiring to allow the removal of
the assembly.
2. Using a spray bottle filled with the recommend-
ed product “RYDLYME” or “CLR”, spray liberally
on the coils, making sure the solution penetrates
and funnels down through the condensate system.
If the condensate system is blocked, let the chem-
ical penetrate for at least 15 minutes or until it
drains.
3. Use the nylon, stainless steel or brass brush (do
not use steel) and scrub coils to remove any
buildup, then vacuum the debris from the coils.
WARNING: Follow precautions above
4. Spray the coils with clear water, making sure to
confine the spray to the area being cleaned (Try to
avoid getting the back ceramic wall of the unit
wet). Flush the combustion chamber with fresh
water until clear water runs from the condensate
drain. At this point, the XFyre should be ready to
be re-assembled.
a. Inspect gaskets.
b. Re-install the burner assembly
Summary of Contents for XFYRE 300
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