Dettson ODH53-F, Инструкция по эксплуатации

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Figure 3: Sight glass
3.3.8- Fan-Limit adjustment
Modification of the “FAN ON” and “HI” limit settings on the Fan-Limit can
cause malfunctioning of the furnace and result in premature wear of the
heat exchanger.
CAUTION
Modification of the factory set limits will void the warranty.
3.3.9- Limit control check
After operating the furnace for at least 15 minutes, restrict the return air
supply by blocking the filters or the return air register and allow the
furnace to shut off on High Limit. The burner will shut off but the blower
will continue to run.
Remove the obstruction and the burner should restart after a few
minutes.
Figure 4: Limit control
3.3.10- Side Wall Venting Blocked intake / blocked vent
test
On side-wall vented furnaces, the Side Wall venting system incorporates
a safety shutdown system that will shut the burner down before #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 #1 smoke occurs, ensure
that the burner is set up according to Part 2, section 3.4 (2.3.4).
Perform the CO
2
/ Smoke Test, and allow for the 1.5% CO
2
operating headroom required by the instructions;
5. If the burner still does not shut down before #1 smoke occurs,
check for a blockage in the pressure hose, or at the hose
connection points.
IMPORTANT
The Side Wall Venting safety shutdown system will 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
(2.3.4). Perform the CO
2
/ Smoke Test. For instance, if the
burner is adjusted and final-set to a #1 smoke condition
during normal operation, the burner flame cannot possibly
shut down before #1 smoke occurs during a blockage
condition.
3.3.11- BVSO performance test
The purpose of the following test is to check that the electrical outlet on
the furnace, designated to the BVSO, is functional.
1.
Start up the burner;
2. Remove the three-pole plug from the BVSO outlet on the furnace;
3. The burner must shut-off immediately, while the blower continues
to run to the end of the cool-down cycle.
If the test is not in line with the above, call a QUALIFIED SERVICE
TECHNICIAN.
DNS-0703 Rev. A
DNS-0355 Rev. B
200˚ F Limit ‘’HI’’
3
130˚ F Limit ‘’FAN ON’’
2
90˚ F Limit ‘’FAN OFF’’
1