Goodman GSC13042 - User Manual

CONDENSING AC UNIT
SINGLE / THREE PHASE AIR CONDITIONERS
INSTALLATION & SERVICE REFERENCE
© 2010-2011 Goodman Manufacturing Company, L.P.
5151 San Felipe, Suite 500, Houston, TX 77056
www.goodmanmfg.com -or- www.amana-hac.com
P/N: IO-402E Date: December 2011
Fixed Orifice
CAUTION
To prevent personal injury, carefully connect and disconnect
manifold gauge hoses. Escaping liquid refrigerant can cause
burns. Do not vent refrigerant into the atmosphere. Recover all
refrigerant during system repair and before final unit disposal.
1. Purge gauge lines. Connect service gauge manifold to
base-valve service ports. Run system at least 10 min-
utes to allow pressure to stabilize.
2. Temporarily install thermometer on suction (large) line
near suction line service valve with adequate contact and
insulate for best possible reading.
3. Refer to the superheat table provided for proper system
superheat. Add charge to lower superheat or recover
charge to raise superheat.
4. Disconnect manifold set, installation is complete.
Superheat Formula = Suct. Line Temp. - Sat. Suct. Temp.
Important Safety Instructions
The following symbols and labels are used throughout this
manual to indicate immediate or potential safety hazards. It
is the owner’s and installer’s responsibility to read and com-
ply with all safety information and instructions accompanying
these symbols. Failure to heed safety information increases
the risk of personal injury, property damage, and/or product
damage.
HIGH VOLTAGE!
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death.
NOTICE
THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM
HOLDING CHARGE ONLY. UNIT MUST BE EVACUATED
AND CHARGED PER INSTALLATION INSTRUCTIONS
WITH REFRIGERANT LISTED ON SERIAL RATING PLATE.
NOTICE
UNITS SHIPPED WITH A HOLDING CHARGE ARE
INTENDED FOR COMPONENT REPLACEMENT ONLY ON
EXISTING SYSTEMS, AND NOT INTENDED FOR USE IN
NEW SYSTEMS OR NEWLY CONSTRUCTED HOMES.
NOTICE
UNITS MUST ONLY BE USED AS REPLACEMENT
COMPONENTS FOR PRE-2010 INSTALLED SYSTEMS.
55 57 59 61 63 65 67 69 71
60 10 13 17 20 23 26 29 30 31
65 8 1114161922262729
70 5 8 10 13 15 19 23 24 25
75 ---- ---- 6 9 11 15 20 21 23
80 ---- ---- ---- ---- 7 12 17 18 20
85
---- ---- ---- ---- ---- 8 13 15 16
90 ---- ---- ---- ---- ---- 5 10 11 13
95
---- ---- ---- ---- ---- ---- 5 8 10
100 ---- ---- ---- ---- ---- ---- ---- 5 8
105
---- ---- ---- ---- ---- ---- ---- ---- 5
110 ---- ---- ---- ---- ---- ---- ---- ---- ----
115 ---- ---- ---- ---- ---- ---- ---- ---- ----
Indoor Wet Bulb Temperature, °F
Outdoor
Dry Bulb
Temperature, °F
SYSTEM SUPERHEAT
‡ Approximate charge shown for 15’ of 3/8” liquid line. System charge must be
adjusted per final charge adjustment (Page 7.)
Models
Nominal
Charge
‡
(oz.)
GSC13018 75
GSC13024 77
GSC13030 66
GSC13036 77
GSC13042 95
GSC13048 89
GSC13060 131

Summary

System Superheat and Fixed Orifice Operation

Fixed Orifice Superheat Adjustment Procedure

Connect gauges, run system, and adjust refrigerant based on superheat table.

Critical Safety Warnings

WARNING: High Voltage Hazard

Disconnect all power before servicing. Multiple power sources may be present. Risk of death.

Installation Clearances and Placement

Minimum Airflow Clearance Requirements

Specifies minimum clearances for residential and light commercial units for proper airflow.

Rooftop Installation Considerations

Address roof structure support, weather integrity, and use vibration pads for noise reduction.

Safe Refrigerant Handling Practices

Refrigerant Line Installation

CAUTION: Compressor Oil and Moisture Protection

Protect compressor oil from moisture absorption. Keep system closed to atmosphere.

Recommended Refrigerant Tubing Sizes

Guide for selecting correct suction and liquid line sizes based on unit tonnage and length.

Refrigerant Line Connections and Brazing

IMPORTANT: Brazing Procedures and Safety

Protect valves, use correct alloy, avoid flux, and quench joints to prevent damage.

WARNING: Leak Testing with Nitrogen

Use nitrogen purge during brazing to prevent oxidation; use caution with pressure during leak testing.

System Evacuation and Leak Testing

Vacuum Measurement and Leak Detection

Evacuate to 250 microns or less. Monitor vacuum rise to detect leaks or moisture.

Electrical Connections and Wiring

WARNING: High Voltage and Wire Safety

Disconnect power. Use copper conductors. Ensure proper wire gauge to prevent damage or fire.

System Start Up and Operation

CAUTION: Preventing Refrigerant Leaks During Start Up

Open service valves carefully to avoid leaks. Ensure valve caps are tightened properly.

WARNING: Refrigerant Pressure Limits During Operation

Do not overcharge or operate in a vacuum. Failure may cause damage, injury, or death.

Final Charge Adjustment

Fixed Orifice Charge Adjustment Procedure

Connect gauges, run system, and adjust refrigerant based on superheat table.

Expansion Valve System Charge Adjustment

Check subcooling and superheat. Adjust TXV or charge to meet specified values.

Troubleshooting Guide

Diagnosing and Resolving Common Issues

Guide to diagnosing and rectifying issues like no cooling, noisy operation, or incorrect pressures.

Goodman GSC13042 Specifications