GROUND INSTALLATION
The unit may be installed at ground level on a solid base that 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.
Normal operating sound levels may be objectionable if the unit is placed directly under windows of certain rooms (bedrooms, study, etc.).
Condensate will drain from beneath the coil of the outdoor unit during the defrost cycle. Normally this condensate may be allowed to drain directly on the ground.
Elevate the unit sufficiently to prevent any blockage of the air entrances by snow in areas where there will be snow accumulation. Check the local weather bureau for the expected snow accumulation in your area.
Isolate the unit from rain gutters to avoid any possible wash out of the foundation.
The outdoor unit should not be installed in an area where mud or ice could cause personal injury. Remember that condensate will drip from the unit coil during heat and defrost cycles and that this condensate will freeze when the temperature of the outdoor air is below 32°F.
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, etc., which should be used to minimize the transmission of sound or vibra- tion into the conditioned space.
UNIT PLACEMENT
1.Provide a base in the
2.Remove the shipping carton and inspect for possible damage.
3.Compressor
4.Position the unit on the base provided.
NOTICE
Heat pumps will defrost periodically resulting in water drainage. The unit should not be located where water drainage may freeze and cre- ate a hazardous condition - such as sidewalks and steps.
LIQUID LINE FILTER-DRIER
The heat pumps have a solid core
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.
Failure to do so or using a substitute drier or a granular type may result in damage to the equipment.
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*As listed on the “Energy Guide yellow sticker on the unit.
PIPING CONNECTIONS
The outdoor unit must be connected to the indoor coil using field sup- plied refrigerant grade 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. See Application Data Part Number 247077 for installing tubing of longer lengths and elevation differences.
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.
PRECAUTIONS DURING LINE INSTALLATION
1.Install the lines with as few bends as possible. Care must be taken not to damage the couplings or kink the tubing. Use clean hard drawn copper tubing where no appreciable amount of bending around obstruction is necessary. If soft copper must be used, care must be taken to avoid sharp bends which may cause a restriction.
2.The lines should be installed so that they will not obstruct service access to the coil, air handling system, or filter.
3.Care must also be taken to isolate the refrigerant lines to minimize noise transmission from the equipment to the structure.
4.The vapor line must be insulated with a minimum of 1/2" foam rubber insulation (Armaflex or equivalent). Liquid lines that will be exposed to direct sunlight and/or high temperatures must also be insulated.
5.Tape and suspend the refrigerant lines as shown. DO NOT allow tube
6.Use PVC piping as a conduit for all underground installations as shown in Figure 3. Buried lines should be kept as short as possible to minimize the build up of liquid refrigerant in the vapor line during long periods of shutdown.
7.Pack fiberglass insulation and a sealing material such as permagum around refrigerant lines where they penetrate a wall to reduce vibra- tion and to retain some flexibility.
8.See Form 247077 for additional piping information.
Sheet Metal Hanger
Liquid
Line
Incorrect
Correct |
| Tape |
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| Insulated Vapor Line | |
FIGURE 2: Tubing Hanger |
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TO INDOOR COIL |
| TO O UTDOOR UNIT |
LIQUID LINE | INSULATED |
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| CAP | |
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PVC | VAPO R LINE |
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CONDUIT 
FIGURE 3: Underground Installation
Johnson Controls Unitary Products | 3 |