Johnson Controls 13 SEER Section Iii Unit Installation, Location, Add-Onreplacement/Retrofit

347337-UIM-A-0408

SECTION III: UNIT INSTALLATION

LOCATION

Before starting the installation, select and check the suitability of the location for both the indoor and outdoor unit. Observe all limitations and clearance requirements.

The outdoor unit must have sufficient clearance for air entrance to the condenser coil, air discharge, and service access. See Figure 1.

NOTE: For multiple unit installations, units must be spaced a minimum of 18 inches apart (coil face to coil face).

If the unit is to be installed on a hot sun exposed roof or a black-topped ground area, the unit should be raised sufficiently above the roof or ground to avoid taking the accumulated layer of hot air into the outdoor unit.

Provide an adequate structural support.

ADD-ON REPLACEMENT/RETROFIT

The following steps should be performed in order to insure proper sys- tem operation and performance.

1.Change-out the indoor coil, if required, to an approved R-22 coil/ condensing unit combination with the appropriate metering device.

2.If the outdoor unit is being replaced due to a compressor burnout, then installation of a 100% activated alumina suction-line filter drier in the suction-line is required, in addition to the factory installed liquid-line drier. Operate the system for 10 hours. Monitor the suction drier pressure drop. If the pressure drop exceeds 3 psig, replace both the suction-line and liquid-line driers. After a total of 10 hours run time where the suction-line pressure drop has not exceeded 3 psig, replace the liquid line drier, and remove the suction-line drier. Never leave a suction-line drier in the system longer than 50 hours of run time.

MINIMUM 24” SERVICE ACCESS

CLEARANCE ON ONE SIDE

THERMOSTAT

48” OVERHEAD
CLEARANCE	WEATHERPROOF
	DISCONNECT
	SWITCH

	NEC CLASS 1 WIRING
12” CLEARANCE	TO FURNACE OR
AROUND PERIMETER	AIR HANDLER
	TERMINAL BLOCK
	NEC CLASS 2 WIRING
	TO INDOOR COIL

NOTE:ALL OUTDOOR WIRING

MUST BE WEATHERPROOF.

CONTROL ACCESS PANEL

SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT

FIGURE 1: Typical Installation

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 coil.

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.

LIQUID LINE FILTER-DRIER

The air conditioning unit’s copper spun filter/dryer is located on the liq- uid line.

NOTE: 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. replacement driers.

Failure to do so or using a substitute drier or a granular type may result in damage to the equipment.

R-22	Apply with Models
Filter-Drier
	AY
Source 1 Part No.
029-22156-000	All Models

2 Johnson Controls Unitary Products