Model DP Oil-Fired Heater
Page 21
4.
Remove both drain plugs from the heater. One is
located on the right side of the inlet/outlet header
(see Figure 20), The other is located on the left
side of the heater in the return header. Com-
pletely drain the heater before the first frost.
5.
After all water has drained from the heater,
check for mineral buildup in the openings.
6.
Use compressed air to blow out any standing
water remaining in the heat exchanger.
7.
Grease the threads on both drain plugs and ports
and place the drain plugs in a safe place for the
winter. Do not reinstall the drain plugs until the
heater is to be started again.
8.
Remove the siphon loop cover from the right side
of the heater.
9.
Remove the compression nut attaching the siphon
loop tube to the pressure switch near the front of
the heater.
10. Allow the siphon loop to drain.
NOTE:
The XL-3 heater is not designed for
continuous use to combat freezing temperatures. Keep
the temperature at a minimum 70°F (21°C) or shut the
heater down completely.
Operating the heater for long periods at or near
freezing water temperature can seriously damage the
heater, and may create a dangerous condition by
fouling the external heat exchanger passages, causing
incomplete combustion. Even with water flowing
through the system, ice may build up in the pipes,
restricting the flow of the water to the heater and
damaging the heat exchanger.
8.2.3 Spring Start-up
To restart the heater in the spring, have a
qualified professional technician reassemble the heater
as follows:
1.
Fill the siphon loop with approximately 5cc of
SAE 50, non-detergent oil. Attach the copper
tubing to the pressure switch.
2.
Install the drain plugs in the ports on both head-
ers.
3.
Make sure that power is supplied to the pump.
Turn on the filter pump and circulate water
through the heater for 5 minutes. Check for leaks
while circulating.
4.
Turn on the main fuel supply to the heater at the
shut off valve near the storage tank.
5.
If a circuit breaker was switched off during the
winter, be sure that the breaker is back on.
6.
Turn on the heater following the start-up instruc-
tions in this manual (see Section 7.2).
8.3 Inspection and Service
Water Pik Technologies designs and constructs
the Laars XL-3 heater to provide long performance
life when installed and operated properly under normal
conditions. Periodic inspections, especially at spring
start-up, are important to keep your heater running
safely and efficiently through the years.
WARNING
Improper installation or maintenance can cause
nausea or asphyxiation from carbon monoxide in flue
gases which could result in severe injury, or death.
8.3.1 Owner Inspection and Maintenance
Water Pik Technologies recommends that you
inspect the heater on a continual basis and especially
after abnormal weather conditions. The following basic
guidelines are suggested for your inspection:
1.
Keep the top and surrounding area of the heater
clear of all debris.
2.
Keep the area around and beneath the heater
clean and free of all combustible materials such
as paper, leaves, etc.
3.
Do not store or use gasoline or other flammable
vapors, liquids or chemicals in the vicinity of this
or any other appliance.
4.
Do not use this heater if any part has been under
water. Immediately call a qualified service
technician to inspect the heater and replace any
part of the control system, firebox and any fuel
control which has been under water.
5.
If the heater is equipped with a pressure relief
valve, check for corrosion in and around the
valve. Twice a year, with the filter pump on, lift
the release lever on the top of the valve to make
sure that water runs freely through it. If corro-
sion is found, replace the pressure relief valve.
When replacing the valve, be sure that the pump
is off. Install the valve so that the discharge is
directed away from any area that may be
damaged by water.
6.
Be sure all combustion air and ventilation open-
ings are not blocked. Check for spider webs and
other debris in the air band, end air shutter and in
the exhaust outlet especially after a long period
of nonuse.
7.
Visually inspect the firebox for damage and
deterioration.
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