5320779-UIM-A-0417
Johnson Controls Unitary Products
3
GROUND INSTALLATION
The unit should be installed on a solid base that is 2” above grade and
will not shift or settle, causing strain on the refrigerant lines and possible
leaks. Maintain the clearances shown in Figure 1 and install the unit in a
level position. The base pad should not come in contact with the foun-
dation or side of the structure because sound may be transmitted to the
residence.
The length of the refrigerant tubing between the outdoor unit and indoor
coil should be as short as possible to avoid capacity and efficiency
losses. Excessive spacing of the outdoor unit from the home can result
in the refrigerant lines being restricted by trampling or being punctured
by lawn mowers. Locate the outdoor unit away from bedroom windows
or other rooms where sound might be objectionable.
Adverse effects of snow or sleet accumulating on the outdoor coil can
be eliminated by placing the outdoor unit where the prevailing wind
does not blow across the unit. Trees, shrubs, corners of buildings, and
fences standing off from the coil can reduce capacity loss due to wind
chill effect.
Provide ample clearance from shrubs to allow adequate air to pass
across the outdoor coil without leaves or branches being pulled into the
fan.
ROOF INSTALLATION
When installing units on a roof, the structure must be capable of sup-
porting the total weight of the unit, including a pad, lintels, rails or any
components used to minimize the transmission of sound or vibration
into the conditioned space.
WALL MOUNT INSTALLATION
Care must be taken to mount the outdoor unit on a solid base that is
sloped to shed water, secure from settlement, and is isolated from the
structural foundation or walls to prevent sound and vibration transmis-
sion into the living space. In addition heat pump units must be elevated
above anticipated snow accumulation levels to allow for proper defrost
drainage and airflow.
On occasion, site conditions may require direct wall mounted brackets
to be used to locate and support the outdoor unit. In these applications,
care must be taken to address unit base pan support, structural integ-
rity, safe access and serviceability, as well as the possible sound and
vibration transmission into the structure. These applications are best
served by a properly engineered solution.
LIQUID LINE FILTER-DRIER
The air conditioning unit’s filter/dryer is located on the liquid line.
PIPING CONNECTIONS
The outdoor condensing unit must be connected to the indoor evapora-
tor coil using field supplied refrigerant grade (ACR) copper tubing that is
internally clean and dry. Units should be installed only with the tubing
sizes for approved system combinations as specified in tabular data
sheet. The charge given is applicable for total tubing lengths up to 15
feet. When more than 50 ft of interconnecting tubing and more than 30
ft of vertical lift is used, consult the Application Data (part number
247077). For long-line applications, interconnecting lines over 100 ft
must be installed with liquid line solenoid. Refer to Technical Guide or
Tabular Data Sheet for maximum length, lifts, and drop.
FIGURE 1:
Typical Installation
0,1,080´6(59,&(
$&&(66&/($5$1&(
2121(6,'(
7+(50267$7
:($7+(53522)
',6&211(&7
6:,7&+
´&/($5$1&(
$5281'3(5,0(7(5
&21752/
$&&(66
3$1(/
6($/23(1,1*6:,7+
3(50$*8025(48,9$/(17
72,1'225&2,/
1(&&/$66:,5,1*
72)851$&(25
$,5+$1'/(5
7(50,1$/%/2&.
1(&&/$66:,5,1*
127(
$//287'225:,5,1*
0867%(:($7+(53522)
$
NOTICE
Replacements for the liquid line drier must be exactly the same as
marked on the original factory drier. See Source 1 for O.E.M. replace-
ment driers.
CAUTION
Failure to do so or using a substitute drier or a granular type may
result in damage to the equipment.
Filter-Drier Source 1 Part No.
Apply with Models
S1-02922195000
All
NOTICE
Using a larger than specified line size could result in oil return prob-
lems. Using too small a line will result in loss of capacity and other
problems caused by insufficient refrigerant flow. Slope horizontal
vapor lines at least 1" every 20 feet toward the outdoor unit to facili-
tate proper oil return.
CAUTION
This system uses R-410A refrigerant which operates at higher pres-
sures than R-22. No other refrigerant may be used in this system.
Gauge sets, hoses, refrigerant containers, and recovery system must
be designed to handle R-410A. If you are unsure, consult the equip-
ment manufacturer.
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