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Unit Leveling Tolerances
FIGURE 6
Slab Mounting Detail
FIGURE 7
CONFIGURING HORIZONTAL UNITS FOR DOWNFLOW
(VERTICAL) DISCHARGE
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, turn off the power
supply to the unit and install lockout tag. There may be
more than one disconnect switch.
1. Open all electrical disconnects before starting any
service work.
2. Remove horizontal duct covers to access bottom return
and supply knock out panels.
3. Use a screwdriver and hammer to remove the panels in
the bottom of the unit base.
NOTE: These panels are held in place with tabs similar to
an electrical knockout.
4. Reinstall the horizontal duct covers (Fig. 10) to block off
the horizontal air openings.
NOTE: Avoid abrupt duct size increases and reductions.
Abrupt change in duct size adversely affects air
performance.
Step 6—Connect Condensate Drain
NOTE: When installing condensate drain connection be
sure to comply with local codes and restrictions.
This unit disposes of condensate water through a 3/4 in.
NPT fitting which exits through the base on the compressor
end of the unit.
Condensate water can be drained directly onto the roof in
rooftop installations (where permitted) or onto a gravel
apron in ground level installations. Install a field--supplied
condensate trap at end of condensate connection to ensure
proper drainage. Make sure that the outlet of the trap is at
least 1 in. (25 mm) lower than the drain--pan condensate
connection to prevent the pan from overflowing. Prime the
trap with water.When using a gravel apron, make sure it
slopes away from the unit.
If the installation requires draining the condensate water
away from the unit, install a field--supplied 2--in. (51mm)
trap at the condensate connection to ensure proper
drainage. Condensate trap is available as an accessory or
is field--supplied. Make sure that the outlet of the trap is at
least 1 in. (25 mm) lower than the unit drain--pan
condensate connection to prevent the pan from
overflowing. Connect a drain trough using a minimum of
field--supplied 3/4--in. (19 mm) PVC or field--supplied
3/4--in. (19 mm) copper pipe at outlet end of the 2--in. (51
mm) trap. (See Fig. 11) Do not undersize the tube. Pitch the
drain trough downward at a slope of at least 1 in. (25 mm)
every 10 ft (3 m) of horizontal run. Be sure to check the drain
trough for leaks. Prime the trap at the beginning of the
cooling season start--up.
Step 7—Install Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
The unit cabinet must have an uninterrupted, unbroken
electrical ground. This ground may consist of an
electrical wire connected to the unit ground screw in the
control compartment, or conduit approved for electrical
ground when installed in accordance with NEC,
ANSI/NFPA
American
Institute/National Fire Protection Association (latest
edition) (in Canada, Canadian Electrical Code CSA
C22.1) and local electrical codes.
CAUTION
!
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the
unit being installed.
Make all electrical connections in accordance with
1.
NEC ANSI/NFPA (latest edition) and local electrical
codes governing such wiring. In Canada, all
electrical connections must be in accordance with
CSA standard C22.1 Canadian Electrical Code Part
1 and applicable local codes. Refer to unit wiring
diagram.
Use only copper conductor for connections between
2.
field--supplied electrical disconnect switch and unit.
DO NOT USE ALUMINUM WIRE.
Be sure that high--voltage power to unit is within
3.
operating voltage range indicated on unit rating
plate.
Do not damage internal components when drilling
4.
through any panel to mount electrical hardware,
conduit, etc.
National
Standards
9
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