Tuberias

Goodman Manufacturing Company, L.P. 1810 Wilson Parkway / Fayetteville, TN 37334 (888) 593-9988 FAX (931) 438-2273 INDEX

TECHNICAL PUBLICATION TP-107

SECTION 1. General Requirements for All Long Line Set Applications ............................... 2 SECTION 2. Outdoor Unit and Indoor Unit are at the Same Elevation ................................ 4 SECTION 3. Outdoor Unit is Above theIndoor Unit ............................................................ 5 SECTION 4. Outdoor Unit is Below the Indoor Unit ............................................................. 5 SECTION 5. Calculations - Tubing Equivalent Length, Tube Size and Refrigerant ............. 6

LONG LINE SET APPLICATION R-410A

Before connecting tubing, read the outdoor unit installation manual. Pay particularattention to all safety precautions.

This long line set application guideline applies to all AHRI listed R-410A air conditioner and heat pump split system matches of nominal capacity 18,000 to 60,000 Btuh. This guideline will cover installation requirements and additional accessories needed for split system installations where the line set exceeds 80 feet in actual length. The long line setscan have three different configurations (1) Outdoor unit and Indoor unit are at the same level, (2) Outdoor unit is above the Indoor unit coil, (3) Outdoor unit is below the Indoor unit. This guideline is meant to provide installation instructions based on most common long line set applications. Installation variables may affect the system operation. TP-107E Contact Goodman® Technical Services forvariations or applications outside those outlined in this document. January 2012 1

SECTION 1. GENERAL REQUIREMENTS FOR ALL LONG LINE SET APPLICATIONS
1. 2. Equivalent length must be used to determine acceptability of any long line set application. See Section 5 for equivalent length calculations. For any residential split system installed with a long line set, 3/8” liquid line size must beused. Limiting the liquid line size to 3/8” is critical since an increased refrigerant charge level from having a larger liquid line could possibly shorten a compressor’s life-span. a. Exceptions for air conditioning (cooling only) applications, 1/4" liquid line may be used in: i. ii. i. ii. iii. 3. 1.5 ton applications for up to 100 equivalent feet with maximum 40’ vertical lift 2.0 tonapplications for up to 75 equivalent feet with maximum 20’ vertical lift 1.5 ton applications for up to 250 equivalent feet with maximum 60’ vertical lift 2.0 ton applications for up to 200 equivalent feet with maximum 40’ vertical lift 2.5 ton applications for up to 175 equivalent feet with maximum 30’ vertical lift

b. Exceptions for air conditioning (cooling only) applications, 5/16" liquid line may beused in:

Most refrigerant tubing kits are supplied with 3/8” thick insulation on the suction line. For long line installations over 80 feet, if the line set passes through a high ambient temperature zone, 1/2” thick suction line insulation is required to reduce loss of capacity. The liquid line must be insulated if more than 50 feet of liquid line will pass through an area that might reachtemperatures of 30°F or higher than outdoor ambient. Never attach a liquid line to any uninsulated portion of the suction line. A crankcase heater must be installed on any compressor (if crankcase heater is not already factory installed). Hard start assist kit is required. Use of a thermostatic expansion valve (TXV) is required in all long line set applications. Unit must be charged to 6º ± 1ºFsubcooling at the indoor unit. Maximum equivalent length of line set is: a. 250 feet for single stage units with scroll or reciprocating compressors. b. 150 feet for single stage units with rotary compressors. c. 150 feet for two stage units. Maximum linear length of line set is: a. 200 feet for single stage units with scroll or reciprocating compressors. b. 150 feet for single stage units with rotary...