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2
Maintenance
Check expansion tank
1. Expansion tanks provide space for water to move in and
out as the heating system water expands due to temperature
increase or contracts as the water cools. Tanks may be
open, closed or diaphragm or bladder type. See Section
5 - Hydronic Piping of the Crest Installation and Operation
Manual for suggested best location of expansion tanks and
air eliminators.
Check fill water meter
1. Check fill water meter for water usage. If the amount
exceeds 5% of your system volume, you could have a leak.
Have the system checked for leaks and fixed by a qualified
service technician.
Test boiler water
1. Test boiler water. Reference the Crest Installation and
Operation Manual for guidelines. When test indicates,
clean system water with approved system restorer following
the manufacturer's information.
Check boiler relief valve
1. Inspect the relief valve and lift the lever to verify flow.
Before operating any relief valve, ensure that it is piped with
its discharge in a safe area to avoid severe scald potential.
Read Section 5 - Hydronic Piping of the Crest Installation
and Operation Manual before proceeding further.
Safety relief valves should be re-inspected
⚠WARNING
AT LEAST ONCE EVERY THREE YEARS,
by a licensed plumbing contractor or authorized inspection
agency, to ensure that the product has not been affected
by corrosive water conditions and to ensure that the valve
and discharge line have not been altered or tampered with
illegally. Certain naturally occurring conditions may corrode
the valve or its components over time, rendering the valve
inoperative. Such conditions are not detectable unless the valve
and its components are physically removed and inspected. This
inspection must only be conducted by a plumbing contractor
or authorized inspection agency – not by the owner. Failure
to re-inspect the boiler relief valve as directed could result in
unsafe pressure buildup, which can result in severe personal
injury, death, or substantial property damage.
Following installation, the valve lever
⚠WARNING
must be operated AT LEAST ONCE A
YEAR to ensure that waterways are clear. Certain naturally
occurring mineral deposits may adhere to the valve, rendering
it inoperative. When manually operating the lever, water will
discharge and precautions must be taken to avoid contact with
hot water and to avoid water damage. Before operating lever,
check to see that a discharge line is connected to this valve
directing the flow of hot water from the valve to a proper place
of disposal. Otherwise severe personal injury may result. If no
water flows, valve is inoperative. Shut down the boiler until a
new relief valve has been installed.
2. After following the above warning directions, if the relief
valve weeps or will not seat properly, replace the relief valve.
Ensure that the reason for relief valve weeping is the valve
and not over-pressurization of the system due to expansion
tank waterlogging or undersizing.
(continued)
Inspect ignition and flame sense
electrodes
1. Remove the ignition and both flame sense electrodes from
the burner plate.
2. Remove any deposits accumulated on the ignition/flame
sense electrodes using sandpaper. If the electrodes cannot
be cleaned satisfactorily, replace with new ones.
3. Replace ignition/flame sense electrodes, making sure the
gaskets are in good condition and correctly positioned.
Check ignition ground wiring
1. Inspect boiler ground wire from the heat exchanger access
cover to ground terminal strip.
2. Verify all wiring is in good condition and securely attached.
3. Check ground continuity of wiring using continuity meter.
4. Replace ground wires if ground continuity is not
satisfactory.
Check all boiler wiring
1. Inspect all boiler wiring, making sure wires are in good
condition and securely attached.
Check control settings
1. Navigate to the Setup Screen and check all settings. See
Section 1 of this manual. Adjust settings if necessary. See
Section 1 of this manual for adjustment procedures.
2. Check settings of external limit controls (if any) and adjust
if necessary.
Perform start-up and checks
1. Start boiler and perform checks and tests specified in
Section 9 - Start-up of the Crest Installation and Operation
Manual.
2. Verify cold fill pressure is correct and that operating
pressure does not go too high.
Check burner flame
1. Inspect flame through observation windows.
2. If the flame is unsatisfactory at either high fire or low
fire, remove and clean the burner. Clean the burner
thoroughly using a vacuum cleaner or compressed air. Do
not use compressed air to clean the burner if cleaning is
performed inside a building.
• Shut down the boiler:
- Follow the "To Turn Off Gas to Appliance"
instructions for the boiler in Section 9 - Startup
of the Crest Installation and Operation Manual.
- Do not drain the boiler unless it will be
exposed to freezing temperatures.
freeze prevention fluid in system, do not drain.
3. Allow time for the boiler to cool to room temperature if it
has been firing.
Service Manual
If using
37
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