Page 6
Pitch down to drain
1" Per 10 Feet
2.00
1.00
VENT
When Necessary
UNIT
RECOMMENDED TRAP DIMENSION
Figure 5 - Condensate Drain
Each unit must be installed with its own individual trap
and connection to the condensate line (main) or riser.
Provide a means to flush or blow-out the condensate
drain line. DO NOT install units with a common trap
and/or vent.
Install a vent in the condensate line of any application
which may allow dirt or air to collect in the line. Always
vent when the application requires a long, horizontal run,
when some sagging in the condensate line may be
anticipated (as in a long line of plastic pipe) or when
"double trapping" may occur. Also vent when large
units are working against higher external static pressure
than other units connected to the same condensate main
since this may cause poor drainage for all units on the
line. When a vent is installed in the condensate line, it
must be located after the trap in the direction of
condensate flow.
Sound Attenuation for Large Commercial
Units
Sound minimization is achieved by enclosing the unit
within a small mechanical room or a closet. Additional
measures for sound control include the following:
1.
Mount the unit so that the return air inlet is 90
°
to
the return air grille. Refer to Figure 2 on facing
page. Install a sound baffle as illustrated to reduce
line-of-sight sound transmitted through return air
grilles.
2.
Mount the unit on a rubber or neoprene isomode pad
to minimize vibration transmission to the building
structure. Extend the pad beyond all four edges of
the unit.
Electrical Wiring
To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch and
secure it in an open position during installation.
Use only copper conductors for field installed
electrical wiring. Unit terminals are not designed to
accept other types of conductors.
All field installed wiring, including electrical ground,
must comply with the National Electrical Code (NEC) as
well as all applicable local codes. In addition, all field
wiring must conform to Class II temperature limitations
described in the NEC.
Refer to the unit name plate for fuse sizes and a schematic
of the field connections which must be made by the
installing (or electrical) contractor.
Consult the unit wiring diagram located on the inside of
the compressor access panel to ensure proper electrical
hookup.
Units rated 208-230 volts that have a 24 volt transformer
must have the transformer connection modified if the
actual power supply is 230 volts. Refer to the unit wiring
diagram for details of this procedure.
All final electrical connections must be made with a
length of flexible conduit to minimize vibration and sound
transmission to the building.
Wall Mounted Thermostat Installation
When the unit has a CXM Series controller, do not use a
heat/ cool pump thermostat. Use a thermostat with Y, G,
O, and W outputs. Refer to unit wiring diagram and CXM
Series AOM for additional information
Vender installation instructions and additional installation
information is shipped with each thermostat.
Maintain zone integrity to assure accurate and
efficient operational control of units or groups of
units. Without adequate zone control, adjacent units
may operate in heating and cooling mode
simultaneously.
All wiring must comply with all applicable electrical
codes including NEC and local codes. Refer to the
thermostat submittal to verify actual wiring requirements.
!
CAUTION
!
CAUTION
WARNING
