Typical Operating Chracteristics; Maintenance; Blower Operation And Adjustment; Temperature Rise - Lennox EL296DF045XV36B Unit Information

V-TYPICAL OPERATING CHARACTERISTICS
A-Blower Operation and Adjustment
1 - Blower operation is dependent on thermostat control
system.
2 - Generally, blower operation is set at thermostat sub­
base fan switch. With fan switch in ON position, blower
operates continuously. With fan switch in AUTO position,
blower cycles with demand or runs continuously while
heating or cooling circuit cycles.
3 - Depending on the type of indoor thermostat, blower
and entire unit will be off when the system switch is in
OFF position.
B-Temperature Rise (Figure 54)
Temperature rise for EL296DFV units depends on unit in­
put, blower speed, blower horsepower and static pressure
as marked on the unit rating plate. The blower speed must
be set for unit operation within the range of "TEMP. RISE
°F" listed on the unit rating plate.

TEMPERATURE RISE

Supply Duct Temperature ________
Return Duct Temperature
Temperature Rise = ________
FIGURE 54
C-External Static Pressure
1 - Tap locations shown in figure 55.
2 - Punch a 1/4" diameter hole in supply and return air ple­
nums. Insert manometer hose flush with inside edge of
hole or insulation. Seal around the hose with perma­
gum. Connect the zero end of the manometer to the
discharge (supply) side of the system. On ducted sys­
tems, connect the other end of manometer to the return
duct as above.
_
_____
SUPPLY
AIR
Temperatures
RETURN AIR
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3 - With only the blower motor running and the evaporator
coil dry, observe the manometer reading. Adjust blow­
er motor speed to deliver the air desired according to
the job requirements. For heating speed (second
stage heat speed) external static pressure drop must
not be more than 0.8" W.C. For cooling speed (second
stage cool speed) external static pressure drop must
not be more than 1.0" W.C.
4 - Seal the hole when the check is complete.
EXTERNAL STATIC PRESSURE
Supply Duct Static ________
Return Duct Static + _____
Total Duct Static = ________(dry coil)
Supply Air
FIGURE 55
VI-MAINTENANCE
WARNING
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly could result
in dangerous operation, serious injury, death or
property damage.
Improper servicing could result in dangerous opera­
tion, serious injury, death, or property damage.
Before servicing, disconnect all electrical power to
furnace.
When servicing controls, label all wires prior to dis­
connecting. Take care to reconnect wires correctly.
Verify proper operation after servicing.
At the beginning of each heating season, system should be
checked as follows by a qualified service technician:
Blower
Check the blower wheel for debris and clean if necessary.
The blower motors are prelubricated for extended bearing
life. No further lubrication is needed.
Duct Static
or
Return Air