3.8) DV-2000 TM Blocked intake / blocked
vent test:
For side-wall venting the furnace the DV-2000 TM
venting system incorporates a safety shutdown system
that will shut the burner down before a #1 smoke occurs
due to the presence of a blocked intake or blocked vent
outlet. Test the system as follows:
1. Ensure that the furnace has been running for at
least 10 minutes.
2. Gradually block the intake. The burner flame should
shut down before a #1 smoke reading occurs.
3. Gradually block the vent outlet. The burner flame
should shut down before a #1 smoke reading
occurs.
4. If the burner does not shut down before a #1 smoke
occurs, ensure that the burner is set up according
to Part 2, section 3.4. Perform the CO2/ Smoke
Test, and allow the 1.5% CO2 operating headroom
required by the instructions.
If the burner still does not shut down before a #1
smoke occurs, check for blockage of the pressure
hose, or at the hose connection points.
IMPORTANT
The DV-2000 TM safety shutdown system will
act to shut down the burner flame during a
blocked intake or blocked vent condition if and
only if the burner has been set up and
calibrated in accordance with Part 2, section
3.4. Perform the CO2/ Smoke Test. For
instance, if the burner is adjusted and final-set
to a #1 smoke condition during normal
operation, the burner flame can't possibly shut
down before a #1 smoke occurs during a
blockage condition.
PART 3
MAINTENANCE
1) GENERAL
Preventive Maintenance:
"Preventive maintenance" is the best way to avoid
unnecessary expense and inconvenience. Have
your heating system and burner inspected at
regular intervals by a qualified service man.
After inspection, a complete combustion test must be
performed after each annual service of the unit to
maintain optimum performance and reliability.
Do not tamper with the unit or controls. Call your
service technician.
Before calling for service, check the following.
a. Check oil tank gauge and check if the oil tank valve
in oil is open.
b. Check fuse or circuit breaker.
c. Check if shut-off switch is "ON".
d. Reset thermostat above room temperature.
e. If ignition does not occur turn off the disconnect
switch and call your qualified service technician.
Electrical shock hazard.
Turn OFF power to furnace before any
disassembly or servicing.
Failure to do so can result in property
damage, bodily injury and/or death.
When ordering replacement parts,
complete furnace model number.
1.1) Heat exchanger:
The entire heat exchanger should be
annually for soot accumulation. If the
operating normally there should very
specify the
inspected
burner is
little soot
accumulation. If the heat exchanger requires scale
removal, use a wire brush first to loosen the scale and
then vacuum the soot and scale that has fallen into the
secondary heat exchanger (radiator) section. You will
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