Maintenance & Troubleshooting; Monthly Inspection And Maintenance; Seasonal Start-Up And Maintenance - ECR CM Installation, Operation & Maintenance Manual

Monthly inspection and maintenance

DANGER
Electrical shock hazard — disconnect power to the
RetroAire replacement Water Source Console Units before
servicing or accessing the control compartment. Failure to do
so could result in severe personal injury or death.
WARNING
It is illegal to discharge refrigerant into the atmosphere. Use
proper reclaiming methods and equipment when servicing a
RetroAire replacement Water Source Console Unit.
For optimum performance and reliability of your RetroAire replace-
ment Water Source Console Unit, ECR International recommends
performing the following inspections and maintenance on a monthly
basis. Units that are installed in harsh or dirty environments will
require more frequent inspections and maintenance.
Disconnect power to unit and remove necessary access panels.
☐ Clean or replace the return air filter.
WARNING
Clean or replace the return air filter as needed. Allowing dust
to collect on the filter will cause the unit to lose efficiency and
eventually malfunction. Check the filter at least once a month.
Some environments may require more frequent replacement,
depending on particulate in the air stream.
NOTICE
If a new air filter is needed for your RetroAire replacement
Water Source Console Unit, consult factory for availability
and/or proper sizing.
☐ Vacuum return air grille surface.
☐ Inspect & clean the chassis interior for rodent or insect infestation.
☐ Clean & flush condensate drain pan.
☐ Ensure the 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 the fins.
Clean if necessary. Be careful not to damage coil fins when cleaning.
Use a fin comb to straighten any bent fins.
☐ 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 the blower wheels .
Use a vacuum and soft brush to clean if necessary.
☐ If the unit has a hydronic option installed, inspect piping, espe-
cially braze joints, for signs of water leaks. Repair if necessary.
☐ Clean the exterior of the cabinet as desired with a mild soap or
household cleaner.
P/N 240008071, Rev. B [112309]
• Installation, Operation, and Maintenance Manual •
Maintenance & Troubleshooting
☐
To reset switch:
Figure 13 Manual Reset Limit Switch

Seasonal start-up and maintenance

At the beginning of the cooling and heating seasons, a complete me-
chanical check should be performed and maintenance/inspections
performed as described below.
Disconnect power to unit and remove necessary access panels.
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Water Source Console Units
In the event the limit switch opens and de-energizes the electric heat,
the limit switch will need to be manually reset.
• Remove the control box cover.
• Locate the limit switch.
• Push in the reset button on the face of the switch (see
Reset Button
*Note:
Button will pop
out when limit
switch opens. Push
in to reset.
Perform the inspections and maintenance defined in "Monthly
start-up and maintenance."
Do a visual check of the equipment. Look for obvious changes in
the unit such as damaged coils or evidence of extended wear on
any moving parts.
Check for unusual odors, oil leaks, or stains on or around the
coil and refrigerant lines. The presence of oil here may indicate
a potentially serious problem such as a refrigerant leak (example
— burned motor windings, water, or refrigerant).
Make sure the base pan is clean.
Inspect all electrical connections.
connections. Terminal ends that are loose will eventually fail, caus-
ing a loss of performance or possible damage to equipment.
Check fan motor and blower assemblies. Some units may require
a drop of light oil to motors and/or bearing assemblies (look for oil
cups). Ensure setscrews and motor mounting hardware are tight.
Brush and/or vacuum the centrifugal fan blades and blower cage
assemblies, as they must be clean to operate efficiently.
If the unit has a hydronic option installed, inspect piping, espe-
cially braze joints, for signs of water leaks. Repair if necessary.
Clean or replace the return air filter.
Vacuum return air grille surface.
Inspect & clean the chassis interior for rodent or insect infestation.
Inspect coils. Use a fin comb to straighten out any damaged fins.
coils must be clean for proper operation.
Figure 13).
Look for frayed wires and poor
These
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