McQuay FCVC, Installation And Maintenance Manual

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McQuay IM 980-1 5
General Information
Recommended Maintenance Clearance
Cabinet units have removable front and side panels for easy
access to components for service and maintenance. The fan
assembly and main drain pan are easily removable from the
front for cleaning. See
Accessing/removing the main drain pan
and motor assembly‚ page 19 for more information.
Figure 4 shows recommended maintenance clearances: 0.5
inches (13 mm) on either side and 10 inches (254 mm) in front.
Units are referred to as either right-hand or left-hand
depending upon the piping connection. Hand is designated by
facing the front of the unit (airflow discharges from the front
or top). Unless it is a special-order unit, the control panel is
always on the end opposite the cooling coil pipe connections.
Figure 4: Recommended maintenance clearance
Duct Connections
Air ducts, when used with hideaway units, should be installed
in accordance with local and national codes, including
National Fire Protection Association standards for the
Installation of Air Conditioning and Ventilating Systems and
the National Fire Protection Association standards for the
Installation of Air Conditioning and Ventilation Systems other
than Residence Type.
A one-inch duct collar is provided on units with a ducted
return and/or discharge to attach ductwork. McQuay
recommends using galvanized sheet metal ductwork. Slide the
sheetmetal duct over the duct collar flange of the unit, seal the
joint and fasten with sheetmetal screws.
Note: Do not run screws through the removable front panel on
hideaway units.
Ductwork Recommendations
Follow the general recommendations listed below when
installing the ductwork for the unit.
1 Discharge ductwork should run in a straight line,
unchanged in size or direction, for a minimum distance
of three fan diameters from the unit (approximately 20
inches).
2 Avoid making sharp turns when making duct turns and
transitions. Use proportional splits, turning vanes, and air
scoops when necessary.
3 When possible, construct and orient supply ductwork
turns in the same direction as the fan rotation.
Safety
Follow all safety codes. Wear safety glasses and work gloves.
Use a quenching cloth for brazing operations. Have a fire
extinguisher available. Follow all warnings and cautions in
these instructions and attached to the unit. Consult applicable
local building codes and National Electrical Codes (NEC) for
special requirements.
Recognize safety information. When you see a safety symbol
on the unit or in these instructions, be alert to the potential for
personal injury. Understand the meanings of the words
DANGER, WARNING, and CAUTION. DANGER identifies
the most serious hazards that will result in death or severe
personal injury; WARNING means the hazards can result in
death or severe personal injury; CAUTION identifies unsafe
practices that can result in personal injury or product and
property damage. Improper installation, adjustment, service,
maintenance, or use can cause explosion, fire, electrical
shock, or other conditions which may result in personal injury
or property damage. This product must be installed only by
personnel with the training, experience, skills, and applicable
licensing that makes him/her “a qualified professional
HVACR installer.”
0.5 in
13 mm
0.5 in
13 mm
10 in
254 mm
DANGER
Disconnect all electrical power before servicing unit. Electrical
shock will cause severe injury or death.
WARNING
Hazardous Voltage!
Use copper conductors only. Unit terminals are not designed to
accept other types of conductors. Failure to do so may cause
damage to the equipment.
WARNING
Personal injury hazard. Wear protective gloves to avoid
possible cuts and abrasions from exposed edges. Avoid
contact with sharp edges.
CAUTION
Cleaning agents may cause serious damage to internal
components, such as aluminum coils and electronic controls,
etc. Do not operate fan coil while building maintenance
cleaning agents are in use..