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Figure 27. Condensate trap installation
Drain Pan Type Connection
CABINET
STD
STAINLESS
A/B/C
3/4" NPT
D
1" PVC Socket
UNIT POST
Drain Pan Removal (Units with
Condensate Overflow Switch Option)
Before drain pan removal, the switch wire must be
disconnected from wire tie on panel and/or any tape before
drain pan can be removed.
Avoid catching the wire on the bottom of indoor coil or any
protrusion.
Furnace Condensate Drain
Modulating gas units are equipped with a furnace
condensate drain system to evacuate any condensation
(water) that may form inside the heat exchanger during
cooling system operation. The unit does not condense
during heating operation. Neutralization is not necessary
as the condensate drainage is water only and is not acidic.
Filter Installation
The quantity of filters is determined by unit size. Refer to
General Data section in Packaged Rooftop Air
Conditioners Precedent™ Cooling and Gas/Electric Ultra
High Efficiency 12.5 to 25 Tons — 60 Hz product catalog
(RT-PRC110*-EN). Access to the filters is obtained by
removing the filter access panel.
Note: Do not operate the unit without filters.
Outdoor Motor Controllers
When either an outdoor motor or an outdoor motor
controller fail, the motor and controller must be replaced
together as received in the service kit since they are a
paired tuned drive/motor assembly. Failure to do so could
result in loss of unit function. The figure below illustrates
the motor controllers are remotely mounted in the block-off
RT-SVX077B-EN
3/4" NPT
1" NPT
FIELD SUPPLIED PIPING
1.5" MIN. (381 MM)
4"+ REQUIRED FOR
HIGHER STATICS
CLEANOUT
PLUG
directly above the front control panel. It is not required to
replace both motor pairs.
Figure 28. Location of outdoor motor controllers
Controller 1 linked to Motor 1
(front motor closest to control panel)
Field Installed Power Wiring
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as
described in NEC and your local/state/national
electrical codes.
An overall dimensional layout for the field installed wiring
entrance into the unit is illustrated in the Dimensions and
Weights chapter. See the following guidelines to confirm
the unit supply power wiring is properly sized and installed.
Verify the power supply available is compatible with unit
nameplate ratings. The available supply power must be
within 10 percent of the rated voltage stamped on the
nameplate. Use only copper conductors to connect the
power supply to the unit.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not
designed or qualified to accept other types of
conductors.
Important: If the unit is not equipped with an optional
factory installed non-fused disconnect switch
or circuit breaker, a field supplied disconnect
switch must be installed at or near the unit in
accordance with the National Electrical Code
(NEC latest edition).
Installation
Controller 2 linked to Motor 2
(rear motor)
29
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