RT-SVX50M-EN
19
☐
Assemble and install the roof curb (if applicable). Refer
to the latest edition of the curb installers guide that
ships with each curb kit.
☐
Fabricate and install ductwork; secure ductwork to
curb.
☐
Rigging the unit.
☐
Set the unit onto the curb; check for levelness.
☐
Ensure unit-to-curb seal is tight and without buckles or
cracks.
☐
Install and connect a condensate drain line to the
evaporator drain connection.
Factory Installed Economizer
•
Ensure the economizer has been pulled out into the
operating position. Refer to the standard or low leak
economizer Installation Instructions for proper position
and setup.
•
Install all access panels.
Controller Wiring Schematic - LLE
For additional information, go to the Installation Instructions
ACC-SVN178*-EN.
Main Electrical Power Requirements
☐
Verify that the power supply complies with the unit
nameplate specifications.
☐
Inspect all control panel components; tighten any loose
connections.
☐
Connect properly sized and protected power supply
wiring to a field-supplied/ installed disconnect switch
and to the main power terminal block (HTB1) in the unit
control panel.
☐
Install proper grounding wires to an earth ground.
Note:
All field-installed wiring must comply with NEC and
applicable local codes.
Electric Heat Requirements
•
Verify that the power supply complies with the electric
heater specifications on the unit and heater nameplate.
•
Inspect the heater junction box and control panel;
tighten any loose connections.
•
Check electric heat circuits for continuity.
•
Low Voltage Wiring (AC and DC) Requirements.
•
Install the zone thermostat, with or without switching
subbase.
•
Connect properly sized control wiring to the proper
termination points between the zone thermostat and
the unit control panel.
Condensate Drain Configuration
An evaporator condensate drain connection is provided on
each unit. Refer to
for the
appropriate drain location.
Note:
Use 1-inch PVC pipe to connect to the drain pan
outlet provided in the unit. This is a slip fit joint (no
threads). Do not use PVC glue to connect
condensate drain, thread sealing compound or
Teflon tape may be used.
A condensate trap must be installed at the unit due to the
drain connection being on the “negative pressure” side of
the fan.
A condensate drain line must be connected to the P-Trap.
Pitch the drain lines at least 0.5-inch for every 10 feet of
horizontal run to assure proper condensate flow. Do not
allow the horizontal run to sag causing a possible
doubletrap condition which could result in condensate
backup due to “air lock”.
Filter Installation
Each unit ships with 2-inch filters installed. The quantity of
filters is determined by unit size. Access to the filters is
obtained by removing the filter access panel.
Refer to the unit Service Facts (shipped with each unit) for
filter requirements
Note:
Do not operate the unit without filters.
Field Installed MERV13 Filters
Optional MERV13 filters are available for purchase.
Replace standard filters with MERV13 Filters according to
the installation instructions provided in the kit.
Field Installed Power Wiring
An overall dimensional layout for the standard field
installed wiring entrance into the unit is illustrated in
. To insure the unit’s supply
power wiring is properly sized and installed, follow the
guidelines outlined below.
Note:
All field installed wiring must conform to NEC
guidelines as well as state and Local codes.
Verify that the power supply available is compatible with
the unit’s 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.
Note:
If the unit is not equipped with an optional factory
installed nonfused 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).
