Operating Ambient, Make Piping Connections

On rooftop applications, locate unit at least 6 in. (152.4 mm) above roof surface.

Operating Ambient

The minimum outdoor operating ambient in cooling mode is 55_F/12.78_C without low ambient cooling enabled, and the maximum outdoor operating ambient in cooling mode is 125_F/51.67_C. On Evolution communicating systems only, for both 180A and 187A models, low ambient cooling is available to 0_F/-17.78_C.

Make Piping Connections

!WARNING

PERSONAL INJURY AND ENVIRONMENTAL HAZARD

Failure to follow this warning could result in personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal Use all service ports and open all flow-control devices, including solenoid valves.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Do not leave system open to atmosphere any longer than minimum required for installation. POE oil in compressor is extremely susceptible to moisture absorption. Always keep ends of tubing sealed during installation.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

If ANY refrigerant tubing is buried, provide a 6 in. (152.4

mm)vertical rise at service valve. Refrigerant tubing lengths up to 36 in. (914.4 mm) may be buried without further special consideration. Do not bury lines longer than 36 in. (914.4 mm).

Outdoor units may be connected to indoor section using field-supplied refrigerant grade tubing of correct size and condition. For tubing requirements beyond 80 ft (24.38 m), substantial capacity and performance losses can occur. Following the recommendations in the Residential Piping and Longline Guideline will reduce these losses. Refer to Table 1 for field tubing diameters. Refer to Table 2 for accessory requirements.

There are no buried-line applications greater than 36 in. (914.4 mm).

If refrigerant tubes or indoor coil are exposed to atmosphere, they must be evacuated to 500 microns to eliminate contamination and moisture in the system.

Outdoor Unit Connected to Factory Approved Indoor Unit:

Outdoor unit contains correct system refrigerant charge for operation with factory approved ARI rated indoor unit with highest sales volume when connected by 15 ft (4.57 m) of field-supplied or factory-accessory tubing, and factory supplied filter drier. Check refrigerant charge for maximum efficiency.

180A / 187A

Table 1 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (in.)

UNIT SIZE		LIQUID		RATED VAPOR*
UNIT SIZE	Connection		Tube	Connection	Tube
	Diameter		Diameter	Diameter	Diameter
187A024	3/8		3/8	5/8	5/8
187A036	3/8		3/8	3/4	3/4
187A048	3/8		3/8	7/8	7/8

187A060	3/8		3/8	7/8	1--- 1/8

180A024
180A036	3/8	3/8		7/8	7/8
180A048
180A060	3/8	3/8		7/8	1--- 1/8

* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length linesets.

Notes:

1.Do not apply capillary tube or fixed orifice indoor coils to these units.

2.For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (250 ft./76.2 m Total Equivalent Length), refer to the Residential Piping and Longline Guideline.

ISO 9001:2000

the environmentally sound refrigerant

REGISTERED

This product has been designed and manufactured to meet Energy Star® criteria for energy efficiency when matched with appropriate coil components. However, proper refrigerant charge and proper air flow are critical to achieve rated capacity and efficiency. Installation of this product should follow all manufacturing refrigerant

charging and air flow instructions. Failure to confirm proper charge and air flow may reduce energy efficiency and shorten equipment life.