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3.7)
Fan limit adjustment:
FIGURE # 4
DNS-0355 Rev.B
1 Limit "FAN OFF"
2
Limit "FAN ON"
Model : OLB6-R & OLR160
Model : OHB5-F, OLB5-F, OLB5-R, OHB6-F,
OUF105, OLF105, OLR105, OUF160,
NOUF105, NOLF105 & NOUF160
3
Limit ''HI''
Model : OLB6-R & OLR160
Model : OHB5-F, OLB5-R, OLB5-F, OUF105,
OLF105, OLR105, NOUF105 & NOLF105
Model : OHB6-F, OUF160 & NOUF160
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.
WARNING
WARNING
!
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.
18
3.8)
DV-2000™ Blocked intake / blocked vent
test:
For side-wall venting the furnace the DV -2000™ 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.
5.
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.
The DV-2000™ safety shutdown system will act to shut
down the burner flame during a blocked intake or
o
90
F
blocked vent condition if and only if the burner has been
set up and calibrated in accordance with tables #4.1, #
o
110
F
4.2 or # 4.3.
o
130
F
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
o
170
F
occurs during a blockage condition.
o
180
F
o
220
F
PART 3
MAINTENANCE
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.
When ordering replacement parts, specify the complete furnace
model number and serial number.
IMPORTANT
Perform the CO2/ Smoke Test.
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