Installation guide

INST ALLATION INSTRUCTIONS R- 410A Split System Air Conditioner
421 01 5103 05 3
Specifications subject to c hange without notice.
Figure 1 Tie Down Knockouts
Base
Pan
Depth
C
B
A
Base Pan Width
a” (10mm) dia. Tie Down Knockouts
In Base Pan (2 places)
View From Top
Inches (mm)
Base Pan
Width x
Depth
Tie Down
Knockouts
Minimum
Mounting Pad
Dimensions
A B C
23 x 23
(584 x 584)
7- 3/4
(197)
4- 7/16
(113)
18
(457)
23 x 23
(584 x 584)
25- 11/16 x
25- 11/16
(652 x 652)
9- 1/16
(230)
4- 7/16
(113)
21- 1/4
(540)
26 x 26
(660 x 660)
31- 1/8 x
31- 1/8
(791 x 791)
9- 1/16
(230)
6- 1/2
(165)
24- 5/8
(625)
31- 1/2 x
31- 1/2
(800 x 800)
34- 15/16 x
34- 15/16
(887 x 887)
9- 1/16
(230)
6- 1/2
(165)
28- 7/16
(722)
35 x 35
(889 x 889)
REFRIGERATION SYSTEM
A. COMPONENT MATCHES
Check to see that the proper system components are in
place, especially the indoor coil.
R- 410A outdoor units can only be used with R- 410A
specific indoor coils. If there is a refrigerant mis- match,
consult the indoor coil manufacturer to determine if a
refrigerant conversion kit is available for the indoor coil.
This outdoor unit is designed for use only with indoor
coils that utilize a TXV refrigerant metering device or
Piston with Teflon ring metering device. If any other type
of metering device is installed on the indoor coil, consult
the indoor coil manufacturer to determine if a TXV
conversion kit is available.
Installing with TXV
When installing a TXV on an indoor coil, follow the
instructions provided with the new TXV.
A typical TXV installation is shown in Figure 2.
Figure 2
Typical TXV Installation
TXV
SENSING
BULB
EQUALIZER
TUBE
INDOOR
COIL
SUCTION
TUBE
LIQUID
TUBE
SENSING BULB
STRAP
SUCTION TUBE
IN. OD & SMALLER
10 O’clock
2 O’clock
3/4
Installing with Indoor Piston - cooling operation.
Check piston size shipped with indoor unit to see if it
matches required indoor piston size. If it does not
match, replace indoor piston with the correct piston size.
NOTE: Correct pistons are shipped with select outdoor
units in the accessory bag and are only for use in certain
qualified and approved fancoils, i.e. FEM4P. (See
Product Specifications for list of approved fancoils that
use accessory piston.)
The piston included with the FMA4P* and FM(C,U)4P*
fancoils are unique to those products and cannot be
replaced with the piston shipped with the outdoor unit.
Refer to the AHRI Directory to check if your combination
can use a piston or requires an accessory TXV.
SeeFigure3.
When changing indoor piston, use a back- up wrench.
Hand tighten hex nut, then tighten with wrench 1/2 turn.
Do not exceed 30 ft- lbs.The indoor piston contains a
Teflon ring (or seal) which is used to seat against the
inside of distributor body, and must be installed properly
to ensure proper seating in the direction for cooling
operation.