MAINTENANCE
DANGER
Electrical shock hazard. Disconnect power to
replacement units before servicing or accessing
control compartment. Failure to do so could result in
severe personal injury or death.
!
NOTICE
It is illegal to discharge refrigerant into the
atmosphere. Use proper reclaiming methods and
equipment when servicing a replacement unit.
Monthly Inspection And Maintenance
For optimum performance and reliability recommend
following inspections and maintenance monthly. Units
installed in harsh or dirty environments require more
frequent inspections and maintenance.
• Disconnect power to unit and remove necessary access
panels.
• Clean or replace the return air
fi
lter. Clean or replace
the return air
fi
lter as needed.
Allowing dust to collect on the
fi
lter will cause unit to lose
ef
fi
ciency and eventually malfunction. Check
fi
lter at least
once a month. Some environments may require more
frequent replacement, depending on particulate in the air
stream.
• Vacuum return air grille surface.
• Inspect & clean chassis interior for rodent or insect
infestation.
• Clean &
fl
ush condensate drain pan.
• Ensure condensate drain is functioning properly.
• Inspect refrigeration tubing, especially braze joints,
for signs of refrigerant leaks (oil residue). Repair if
necessary.
• Inspect coil. Ensure dirt or debris have not collected
on
fi
ns. Clean if necessary. Take care not to damage
coil
fi
ns when cleaning. Use
fi
n comb to straighten any
bent
fi
ns.
• Examine control box. Ensure all wire connections are
secure.
• Ensure blower wheels are secured to their motor shafts.
• Ensure dirt or debris have not collected on blower
wheels. Use vacuum and soft brush to clean if
necessary.
• If unit has hydronic option installed, inspect piping,
especially braze joints, for signs of water leaks. Repair
if necessary.
• Clean exterior of cabinet as desired with mild soap or
household cleaner.
• In event limit switch opens and de-energizes electric
heat, limit switch will need to be manually reset.
To reset switch:
☐
Remove control box cover.
☐
Locate limit switch.
☐
Push in reset button on switch face. See Figure
12.
Figure 12
Manual Reset Limit Switch
Reset Button
*Note:
Button will pop
out when limit
switch opens.
Push in to reset.
Seasonal Start-Up And Maintenance
At the beginning of cooling and heating seasons, complete
mechanical check should be performed and maintenance/
inspections performed as described below.
Disconnect power to unit and remove necessary access
panels.
1.
Perform inspections and maintenance de
fi
ned in
“Monthly start-up and maintenance.”
2.
Visually check equipment. Look for obvious changes
in unit such as damaged coils or evidence of extended
wear on any moving parts.
3.
Check for unusual odors, oil leaks, or stains on or
around coil and refrigerant lines. Presence of oil here
may indicate potentially serious problem such as
refrigerant leak
(example — burned motor windings,
water, or refrigerant).
4.
Verify base pan is clean.
5.
Inspect all electrical connections. Look for frayed
wires and poor connections. Loose terminal ends will
eventually fail, causing loss of performance or possible
damage to equipment.
6.
Check fan motor and blower assemblies. Some units
may require drop of light oil to motors and/or bearing
assemblies, look for oil cups. Verify set-screws and
motor mounting hardware are tight.
7.
Brush and/or vacuum centrifugal fan blades and
blower cage assemblies, they must be clean to operate
ef
fi
ciently.
8.
If unit has hydronic option installed, inspect piping,
especially braze joints, for signs of water leaks. Repair
if necessary.
9.
Clean or replace return air
fi
lter.
10.
Vacuum return air grille surface.
11.
Inspect and clean chassis interior for rodent or
insect infestation.
The Right Fit for Comfort
19
Made in USA
