Johnson Controls GCGA Series Instruction Manual
Johnson Controls GCGA Series Instruction Manual

Johnson Controls GCGA Series Instruction Manual

R-22/r-407c outdoor split-system air conditioning

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INSTALLATION MANUAL
R-22/R-407C
OUTDOOR SPLIT-SYSTEM
AIR CONDITIONING
MODELS: GCGA SERIES
1.5 TO 6.3 TONS - 1 & 3 PHASE
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
ORIFICE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
TXV INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation of Vapor Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Orifice Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Outdoor Unit Control Box (Single Phase) . . . . . . . . . . . . . . . . . . . . . .8
(Single-Phase) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Application Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
R-22 Saturation Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
SECTION I: GENERAL
The outdoor units are designed to be connected to a matching indoor
coil with sweat connect lines. Since these units are designed to operate
on either R-22 or R-407C, they have been shipped from the factory with
a nitrogen holding charge.
This unit does not contain any refrigerant. It contains a nitrogen
holding charge. Operating this unit with the nitrogen holding charge
will damage the compressor.
Before operating this unit, vent the nitrogen and evacuate the entire
system below 500 microns. Weigh in the refrigerant using the Tabu-
lar Data Sheet and Installation Manual.
The refrigerant charge may need to be changed for some indoor-out-
door unit combinations, elevation differences or total line lengths. Refer
to Application Data covering "General Piping Recommendations and
Refrigerant Line Length" (Part Number 247077).
SECTION II: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Johnson Controls Unitary Products
LIST OF SECTIONS
EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTRUCTING THE OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
LIST OF FIGURES
(Three Phase - GCGA36-60) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
(Three-Phase - GCGA76) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Wiring Diagram - Single Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring Diagram - Three Phase - GCGA36-60 . . . . . . . . . . . . . . . . . 14
Wiring Diagram - Three Phase - GCGA76 . . . . . . . . . . . . . . . . . . . . 15
LIST OF TABLES
R-407C Saturation Properties (Superheat Only) . . . . . . . . . . . . . . . . 7
R-407C Saturation Properties (Subcooling Only) . . . . . . . . . . . . . . . . 7
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
This product must be installed in strict compliance with the
enclosed installation instructions and any applicable local, state,
and national codes including, but not limited to building, electrical,
and mechanical codes.
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Refer to this manual
for assistance or for additional information, consult a qualified con-
tractor, installer or service agency.
548086-XIM-A-0310

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Summary of Contents for Johnson Controls GCGA Series

  • Page 1: Table Of Contents

    R-22/R-407C OUTDOOR SPLIT-SYSTEM AIR CONDITIONING MODELS: GCGA SERIES 1.5 TO 6.3 TONS – 1 & 3 PHASE LIST OF SECTIONS GENERAL ..........1 EVACUATION .
  • Page 2: Unit Installation

    TO FURNACE OR AROUND PERIMETER AIR HANDLER TERMINAL BLOCK NEC CLASS 2 WIRING TO INDOOR COIL NOTE: ALL OUTDOOR WIRING CONTROL MUST BE WEATHERPROOF. ACCESS SEAL OPENING(S) WITH PANEL PERMAGUM OR EQUIVALENT FIGURE 1: Typical Installation Johnson Controls Unitary Products...
  • Page 3: Installation Of Vapor Line

    The initial charge given is applicable for total tubing lengths up to 15 feet (4.6 m). See Application Data Part Number 247077 for installing tubing of longer lengths and elevation differences. Conduit FIGURE 3: Underground Installation Johnson Controls Unitary Products...
  • Page 4: Heat Protection

    Never attempt to repair any brazed connections while the system is under pressure. Personal injury could result. See "System Charge” section for checking and recording system charge. FIGURE 4: Heat Protection Supplied with the outdoor unit is an Orifice for highest sales volume indoor coil. Johnson Controls Unitary Products...
  • Page 5: Orifice Installation

    Refrigerant charging should only be carried out by a qualified air conditioning contractor. Bulb should be installed on a horizontal run of the vapor line if possible. The bulb should be installed on top of the line. Johnson Controls Unitary Products...
  • Page 6: Saturation Properties

    63°F. TABLE 2: R-22 Saturation Properties Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp psig °F psig °F psig °F psig °F psig °F psig °F psig °F Johnson Controls Unitary Products...
  • Page 7: Electrical Connections

    All field wiring must USE COPPER CONDUCTORS ONLY and be in accordance with Local, National, Fire, Safety & Electrical Codes. This unit must be grounded with a separate ground wire in accor- dance with the above codes. Johnson Controls Unitary Products...
  • Page 8: Outdoor Unit Control Box (Single Phase)

    FIGURE 7: Outdoor Unit Control Box (Three Phase - GCGA36-60) To eliminate erratic operation, seal the hole in the wall at the ther- mostat with permagum or equivalent to prevent air drafts affecting the operation of in the thermostat. Johnson Controls Unitary Products...
  • Page 9: Typical Field Wiring (Air Handler / Electrical Heat) (Single-Phase)

    GND. ROOM THERMOSTAT RED: 24 VAC BROWN: COMMON ALL OUTDOOR WIRING MUST BE WEATHERPROOF. USE COPPER CONDUCTORS ONLY. YELLOW: 1ST STAGE COOLING FIGURE 11: Typical Field Wiring for 76 Models with Air Handler (Three-Phase - GCGA76) Johnson Controls Unitary Products...
  • Page 10: Thermostat Chart - Single Stage Ac With Psc Furnace

    LV RSWLRQDO ZKHQ XVHG ZLWK EDWWHULHV 7KHUPRVWDW ,QVWDOOHU 6HWXS 6\VWHP 7\SHPXVW EH VHW WR  +HDW &RRO &RQYHQWLRQDO 3DUW 1XPEHUV 3DUW 1XPEHU /HJDF\ 6+8   FIGURE 12: Thermostat Chart - Single Stage AC with PSC Furnace Johnson Controls Unitary Products...
  • Page 11: Thermostat Chart - Single Stage Ac With Psc Air Handler

    7KHUPRVWDW ,QVWDOOHU 6HWXS 1R IXQFWLRQ LQ WKLV 6\VWHP 7\SHPXVW DSSOLFDWLRQ EH VHW WR  +HDW &RRO &RQYHQWLRQDO 3DUW 1XPEHUV 3DUW 1XPEHU /HJDF\ 6+8   FIGURE 13: Thermostat Chart - Single Stage AC with PSC Air Handler Johnson Controls Unitary Products...
  • Page 12: Instructing The Owner

    Clean as often as necessary to keep OF THIS UNIT. the unit clean. Use a brush, vacuum cleaner attachment, or other suitable means. 2. The outdoor fan motor is permanently lubricated and does not require periodic oiling. Johnson Controls Unitary Products...
  • Page 13: Wiring Diagram

    548086-XIM-A-0310 SECTION X: WIRING DIAGRAM FIGURE 14: Wiring Diagram - Single Phase Johnson Controls Unitary Products...
  • Page 14: Wiring Diagram - Three Phase - Gcga36-60

    548086-XIM-A-0310 *412217* FIGURE 15: Wiring Diagram - Three Phase - GCGA36-60 Johnson Controls Unitary Products...
  • Page 15: Wiring Diagram - Three Phase - Gcga76

    548086-XIM-A-0310  FIGURE 16: Wiring Diagram - Three Phase - GCGA76 Johnson Controls Unitary Products...
  • Page 16 NOTES Subject to change without notice. Published in U.S.A. 548086-XIM-A-0310 Copyright © 2010 by Johnson Controls, Inc. All rights reserved. Supersedes: Nothing Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...

This manual is also suitable for:

Gcga36-60Gcga76

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