INSTALLATION FOR NEW CONSTRUCTION
Installation Instructions — R20C | R20H
Installation
Verify the existing wall thickness
1.
— The distance from the
condenser coil to the outdoor louver varies with sleeve depth. Two
sets of air baffles are included with each unit to accommodate most
installation requirements. Other air baffle kits are available from
the factory (
unique for applications
). Know the wall sleeve depth
when ordering to ensure proper baffle size.
Verify Weather Angle
2.
— Slide the unit into the wall sleeve.
If the supply duct on the cooling chassis does not line up with
the supply vent on the room cabinet, it is possible that factory
installed the weather angles on the top and the sides will have to
be reversed. This will allow approximately 1” of adjustment for
alignment with the supply vent when mounting the unit to the
wall sleeve (see Figure 14 and Figure 15). Slide the unit back in
the wall sleeve to verify proper fit.
Install the baffles
3.
— Slide the unit back out of the wall sleeve.
Remove both sets of baffles from the kit bag supplied with unit.
Install only one set of left and right side baffles on the condenser
coil by completing steps below:
Choose the proper fitting baffles for your application by verifying
•
selected baffles come in contact with the outdoor louver.
Make sure the baffles are directed inward toward the center of
•
coil (see Figure 16).
Secure baffles tightly into the existing holes of the condenser coil
•
using the screws provided.
NOTICE
The correct condenser air baffles must be installed or performance
may be impaired.
Install the foam tape
4.
— Apply ¹∕₂” x ¹∕₂” open-cell foam strips
around supply air duct to ensure that all the conditioned air is
delivered into the room (see Figure 16). Failure to do so results
in recirculation of the conditioned air around the cabinet causing
the unit to short cycle and coil to freeze.
Install the foam tape
5.
— apply 1” x 1” open-cell foam strips to
the weather angle to prevent outside air from entering around the
cooling chassis to the room from the sides and top of the cabinet.
Install between the wall sleeve and the chassis (see Figure 17). It
is imperative to have a solid air seal between the wall sleeve and
the chassis. Failure to do so will result in air leakage from outdoor
to indoor causing system problems
(example — coils freezing, short
cycling, and constant running of unit)
. If there is a need for more
foam than supplied in kit, consult the factory.
Connecting the optional hydronic coil controls
6.
— If the
hydronic heat option has been ordered, then the hydronic coil
will need to be field installed on the new unit. Hydronic coils
are not factory installed and need to be ordered. The coil with
the old unit can be located in the subbase, under the chassis in a
special attachment, or above the chassis in a special attachment.
It is necessary to know where the coil is to be located and the
physical size of the coil so the new coil can be verified if ordered
for replacement. The new coil should be installed in the same
manner as the coil it is replacing.
Remove the 2-position connector assembly from kit bag supplied
•
with unit (
this will have 2 yellow wires attached
).
Connect this 2-position connector to the 2-position connection
•
located on the bottom of the control box panel.
Connecting the accessory Aquastat
7.
— If the accessory
Aquastat has been ordered, then it will need to be field installed.
Remove the black jumper wire located on the bottom panel of the
•
control box (
this is also terminated with a 2-position connector
).
Cut the jumper wire in the middle and splice the Aquastat to
•
the jumper.
Place the connector back into the original location. Refer to the
•
wiring diagram on the unit for details.
Secure the chassis
8.
— After ensuring that all seals are the
correct size and in the proper location and the correct baffles are
attached to the condenser coil in the proper orientation, slide
the unit into the final position and tighten any tie down bolts or
screws as necessary.
Hard-wired units
9.
— If the unit is hard wired, follow the in-
structions on page 11 to verify existing wiring and overcurrent
protection. Remove the line cord wires from the PTAC/PTHP
power entrance terminals. Route the power supply wiring through
a strain-relief bushing and connect leads to the power entrance
terminals. Secure the strain-relief clamp. (If wiring is through
conduit, insert the conduit through the control box knockout
and secure in place.)
DO NOT
turn on power until completing
instructions in "Final Inspection and Startup" on page 26.
DO NOT PLUG IN the line cord, if used
10.
. Follow instructions
in "Final Inspection and Startup" on page 26.
Adjustable Weather Angle
Dimension "A"
8 5/8”
7 7/8”
9 11/16”
(1)
8”
(2)
Dimension "B"
9 1/2”
10 1/4”
8 7/16”
(1)
10 1/8”
(2)
Dimensions are calculated without foam gaskets.
(1) Standard position — Factory installed.
(2) Position for Climate Master 702 and 703.
Replacement Packaged Terminal Air-Conditioning / Heat Pump
• Installation, Operation, and Maintenance Manual •
The Right Fit for Comfort
14
P/N 240008034, Rev. D [7/29/2011]
