Preparing for the Installation of the PTAC/PTHP
WARNING
Moving parts
can cause personal injury. Avoid contact with
moving parts when testing or servicing the unit.
Verify existing wall sleeve/enclosure:
RetroAire replacement PTAC/PTHP's are to be used with
metal wall sleeves.
The existing front panels must be secured by screws that prevent
contact with all parts.
Minor dimensions of openings must not exceed ½ inch
(12.5mm).
The indoor air discharge grill must have dimensions not less than
26” x 4”. The grill must separate the top surface of the chassis
from the top surface of the discharge grill by a minimum of 1
in (25.4mm).
For all models, the outdoor openings must prevent contact
of all moving parts by means of louvers or grills, with minor
dimension not exceeding 1 in (25.4mm).
Electrical supply
Each unit must have a separate branch circuit protected by a fuse
or breaker. Refer to the unit rating plate for the proper wire and
breaker or fuse size. Use of extension cords is prohibited.
DO NOT connect the RetroAire unit to a circuit with an
incorrectly-sized overcurrent-protection device.
All cord-connected 265-volt units must be plugged into recep-
tacles within the unit subbase or chassis.
Electrical shock hazard
— Before opening the existing
unit:
Open the power supply disconnect switch. Secure it in an open
position during installation. Attach a sign stating, "
DO NOT
TURN ON.
"
On a plug and receptacle connection, unplug the existing unit at
the wall outlet. DO NOT plug in the new unit until installation is
complete and the start-up checklist has been completed.
Failure to comply with the above could result in severe personal
injury, death or substantial property damage.
NOTICE
All wiring should be in accordance with both the National
Electric Code (NEC) and the local building codes.
UNITS RATED 208/230V
— the RetroAire unit is wired for
230v primary voltage from the factory. The transformer must
be rewired by the installer if the jobsite voltage is 208v. Change
the transformer tap from orange to red. See the wiring diagram
for details.
Electrical power connection
Check the RetroAire unit rating plate for circuit ampacity and
1.
required breaker or fuse size.
Verify that the existing breaker or fuse is the correct size.
2.
Replace the breaker or fuse if incorrectly-sized.
a.
Breakers must be type HACR only.
b.
Cord-connected units — verify that the wall outlet is the correct
3.
rating. The outlet's blade configuration must match that of the
cord supplied with the RetroAire unit.
Hard-wired units — verify that the power wiring is correctly sized.
4.
Inspect the existing wiring for any deficiencies, such as cuts or
frayed wires. Replace such wiring if found.
Remove the old chassis
Disconnect power or unplug cord before proceeding.
1.
See
WARNING
at left.
Remove the front of the existing room enclosure to expose the
2.
old chassis.
Loosen any tie-down bolts or screws and remove the old chassis.
3.
NOTICE
Dispose of the old chassis following existing state and federal
regulations.
Inspect the wall sleeve/cabinet for any rust, holes, or damage.
4.
Clean the wall sleeve of any dirt.
a.
Repair any damage.
b.
Ensure proper drainage of condensate or rainwater to exterior
c.
of building.
Remove or repair the old weather seals and make note of the
5.
location for the installation of any new seals.
Check the wall sleeve/cabinet to ensure all drain holes are open
6.
and that:
The wall sleeve/enclosure is level left to right
a.
The back is pitched to the outside by ½in (12.5mm) maxi-
b.
mum.
Before installing the new chassis, inspect the outdoor louver for a
7.
minimum free area of 70% and remove any obstructions. Obstruc-
tions will restrict air flow over the condenser coil and may cause
serious damage to the chassis. It will also void the warranty.
See the instructions for the specific RetroAire unit on the fol-
8.
lowing pages.
DO NOT
9.
connect power to the unit or plug in the cord until all
instructions in this manual have been followed.
Replacement Packaged Terminal Air-Conditioning / Heat Pump
• Installation, Operation, and Maintenance Manual •
P/N 240008639, Rev. B [8/16/2011]
11
Made in USA
