Carrier 50GJ006 Installation, Start-Up And Service Instructions Manual
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Carrier 50GJ006 Installation, Start-Up And Service Instructions Manual

Carrier 50GJ006 Installation, Start-Up And Service Instructions Manual

Single-package rooftop cooling units
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Single-Package Rooftop Cooling Units
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Step 1- Provide Unit Support . . . . . . . . . . . . . . . 1
• SLAB MOUNT
Step 2 - Field Fabricate Ductwork . . . . . . . . . . . 4
External Trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 4 - Rig and Place Unit . . . . . . . . . . . . . . . . . 4
• POSITIONING
• HEAT ANTICIPATOR SETTINGS
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-27
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-31
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 32-34
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical com-
ponents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service per-
sonnel. When working on air-conditioning equipment, ob-
serve precautions in the literature, tags and labels attached
to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire ex-
tinguisher available for all brazing operations.
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 111
Tab
1b 6b
Installation, Start-Up and
Service Instructions
Page
Catalog No. 535-042
Printed in U.S.A.
50GJ006-012
The 50GJ units may only be charged with R-407C re-
frigerant. Do not use R-22.
The use of R-407C necessitates the use of a polyolester
(POE) oil. POE oil is not to be confused with or mixed with
mineral oil typically used in R-22 systems. Precautions must
also be taken to minimize open exposure of the oil to at-
mosphere as it is very hydroscopic and will absorb moisture
from the air. To minimize the possibility of moisture con-
tamination to the refrigerant system a special 100% molecu-
lar sieve filter drier is used.
Refrigerant R-407C must always be charged liquid. Charg-
ing gas will cause the refrigerant to fractionate and change
the chemical properties, impacting system performance.

INSTALLATION

Unit is shipped in the vertical configuration. To convert to
horizontal configuration, remove side duct opening covers.
Using the same screws, install covers on vertical duct open-
ings with the insulation-side down. Seals around duct open-
ings must be tight.
Step 1 - Provide Unit Support
ROOF CURB - Assemble and install accessory roof curb
in accordance with instructions shipped with curb. See
Fig. 1A and 1B. Install insulation, cant strips, roofing felt,
and counter flashing as shown. Ductwork must be attached
to curb. If electric or control power is to be routed through
the curb, attach the accessory thru-the-curb service connec-
tion plates to the roof curb in accordance with the accessory
installation instructions. Connection plates must be installed
before unit is set on roof curb.
IMPORTANT: The gasketing of the unit to the roof
curb is critical for watertightness. Install gasket sup-
plied with the roof curb as shown in Fig. 1A and 1B.
Improperly applied gasket can also result in air leaks
and poor unit performance.
Curb should be level. Unit leveling tolerances are shown
in Fig. 2. This is necessary for unit drain to function prop-
erly. Refer to Accessory Roof Curb Installation Instructions
for additional information as required.
SLAB MOUNT (Horizontal Units Only) - Provide a level
concrete slab that extends a minimum of 6 in. beyond unit
cabinet. Install a gravel apron in front of condenser coil air
inlet to prevent grass and foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
Form 50GJ-1SI
Pg 1
4-95
Replaces: New

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Summary of Contents for Carrier 50GJ006

  • Page 1: Table Of Contents

    50GJ006-012 Single-Package Rooftop Cooling Units Installation, Start-Up and Service Instructions CONTENTS Page The 50GJ units may only be charged with R-407C re- frigerant. Do not use R-22. SAFETY CONSIDERATIONS ....1 INSTALLATION .

  • Page 2: Roof Curb

    5. Attach ductwork to curb (flanges of duct rest on curb). 6. Service clearance 4 ft on each side. Direction of airflow. 8. Control and power service plates are part of a sepa- rately shipped accessory package. Fig. 1A — Roof Curb Details — 50GJ006...
  • Page 3 SERVICE PLATE SIZES CONNECTOR UNIT SIZE D ALT DRAIN HOLE F POWER G CONTROL ACCESSORY PACKAGE 50DJ901311 1 NPT or 2 NPT ⁄ (THRU-THE-SIDE) CRBTMPWR00A100 50GJ008,012 2 -8 ⁄ [827] 1 -10 ⁄ [583] ⁄ [45] ⁄ ⁄ (THRU-THE-BOTTOM) CRBTMPWR00A200 ⁄...

  • Page 4: Step 2 - Field Fabricate Ductwork

    50GJ006 50GT008,012 MAXIMUM ALLOWABLE DIFFERENCE (in.) Fig. 3 — Condensate Drain Location Fig. 2 — Unit Leveling Tolerances Step 2 — Field Fabricate Ductwork — On verti- cal discharge units, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. For horizontal applications, field-supplied flanges should be attached to hori-...
  • Page 5 NOTES: OPERATING 1. Dimension in ( ) is in millimeters. WEIGHT 50GJ 2. Hook rigging shackles through holes in base rail, as shown in de- tail A. Holes in base rails are centered around the unit center of gravity. Use wooden top skid when rigging to prevent rigging straps 73.69 1872 35.5 902 33.3 from damaging unit.
  • Page 6 Table 1 — Physical Data BASE UNIT 50GJ NOMINAL CAPACITY (tons) ⁄ OPERATING WEIGHT (lb) Unit With Varislide™ Economizer With PARABLADE Economizer Roof Curb COMPRESSOR Scroll Quantity Oil (oz) (each compressor) REFRIGERANT TYPE R-407C Operating Charge (lb-oz) Circuit 1 9-12 7- 6 —...
  • Page 7 7. Units may be installed on combustible floors made from wood or Class A, B, or C roof covering material. 8. The vertical center of gravity is 1 -6 ⁄ [470] up from the bottom of the base rail. Fig. 6A — Base Unit Dimensions — 50GJ006...
  • Page 8 VARISLIDE™ PARABLADE STD UNIT CORNER CORNER CORNER CORNER ECONOMIZER ECONOMIZER ‘‘H’’ ‘‘J’’ ‘‘K’’ UNIT WEIGHT WEIGHT (A) WEIGHT (B) WEIGHT (C) WEIGHT (D) WEIGHT WEIGHT 50GJ Ft-in. Ft-in. Ft-in. mm 2 -0 ⁄ 632 3 -5 ⁄ 1050 2 -9 ⁄...
  • Page 9 50GJ008,012, 208/230-3-60 50GJ006, 208/230-3-60, 460-3-60 50GJ008,012, 460-3-60 50GJ006, 575-3-60 50GJ008,012, 575-3-60 LEGEND — Contactor COMP(S) — Compressors — Indoor (Evaporator) Fan Contactor — National Electrical Code — Outdoor (Condenser) Fan Contactor Terminal Block Field Wiring Factory Wiring Splice Connection (Factory-Supplied)

  • Page 10: Step 5 - Make Electrical Connections

    Such operation would invalidate any applicable Refer to unit label diagram for additional information. Pig- Carrier warranty. tails are provided for field wire connections. Use factory- supplied splices or UL (Underwriters’ Laboratories) approved copper/aluminum connector.
  • Page 11 Table 2B — Electrical Data (Units With Electrical Convenience Outlet) VOLTAGE ELECTRIC MINIMUM UNIT NOMINAL COMPRESSOR POWER SUPPLY UNIT RANGE (each) HEAT* DISCONNECT SIZE VOLTAGE 50GJ (V-Ph-Hz) Nominal kW† MOCP — — 34.9/34.9 40/ 40** 34/34 4.9/ 6.5 13.6/15.6 34.9/34.9 40/ 40** 34/34 7.9/10.5...

  • Page 12: Field Control Wiring

    (evaporator) fan status, filter status, and indoor-air quality. The Apollo control is designed to work with Carrier TEMP and VVT systems. The thermostat must be wired to the Apollo control before starting the unit.

  • Page 13: Optional Varislide™ Economizer

    OPTIONAL VARISLIDE™ ECONOMIZER — The op- 14. Slide outdoor-air inlet screen(s) into screen track on hood tional economizer hood assembly is packaged and shipped side plate. On size 008 and 012 units, use screen clasp in the filter section. Damper blades and control boards are to hold screens together.
  • Page 14 ECONOMIZER MOTOR ECONOMIZER CONTROL BOARD WIRING HARNESS BAROMETRIC RELIEF DAMPER ECONOMIZER MOUNTING SCREWS Fig. 14 — Varislide™ Economizer Installed in Unit ECONOMIZER CONTROL BOARD WIRING HARNESS Fig. 12 — Outdoor-Air Hood Details ECONOMIZER MOTOR Fig. 15 — Horizontal Varislide Economizer Installation (90 Degree Rotation) OUTDOOR AIR HOOD PARTS LOCATED BEHIND THIS PANEL...
  • Page 15 EXAMPLE: Given — Negative Pressure ..0.2 in. wg Outdoor Air ....900 cfm Determine — Setting = 5 in. Fig.

  • Page 16: Optional Parablade Economizer

    7. If ventilation air is not required, proceed to Step 8. If ventilation air is required, perform the following: a. Make sure the factory-installed jumper is in place across terminals P and P1 on the economizer logic module. should disconnected during adjustment.
  • Page 17 ECONOMIZER CONTROL MODULE/DAMPER ACTUATOR Fig. 24 — Panels Reinstalled on Unit Fig. 22 − PARABLADE Economizer Installed in Unit CONTROL POINT CONTROL (APPROX. DEG.) CURVE AT 50% RH 73 (23) 70 (21) 67 (19) 63 (17) Fig. 25 — Outdoor-Air Hood Installed on Unit Fig.

  • Page 18: Step 7 - Adjust Evaporator-Fan Speed

    Step 7 — Adjust Evaporator-Fan Speed — just evaporator-fan speed to meet jobsite conditions. For units with electric heat, required minimum cfm is 1500 for 50GJ006, 2250 for 50GJ008 and 3000 for 50GJ012 with the following exceptions: UNIT REQUIRED UNIT...
  • Page 19 1035 1010 — — 1080 1060 1035 1015 — — *Approximate fan rpm shown. Table 6 — Fan Performance − 50GJ006 Vertical Discharge Units BELT DRIVE MOTOR External Static Pressure (in. wg) Airflow (Cfm) 1500 0.33 0.39 0.51 0.64 1052 0.78...
  • Page 20 4. Values include losses for filters, unit casing, and wet coils. Note 6.) 5. Use of a field-supplied motor may affect wire sizing. Contact Carrier representative to verify. Indicates field-supplied motor and drive are required. 6. Standard motor drive range: 840 to 1085 rpm. All other rpms re- quire field-supplied drive.
  • Page 21 4. Values include losses for filters, unit casing, and wet coils. Note 6.) 5. Use of a field-supplied motor may affect wire sizing. Contact Carrier representative to verify. Indicates field-supplied motor and drive are required. 6. Standard motor drive range: 860 to 1080 rpm. All other rpms re- quire field-supplied drive.
  • Page 22 Table 9 — Fan Performance — 50GJ006 Horizontal Discharge Units BELT DRIVE MOTOR External Static Pressure (in. wg) Airflow (Cfm) 1500 0.31 0.35 0.47 0.60 1026 0.74 1600 0.36 0.40 0.53 0.66 1049 0.81 1700 0.40 0.47 0.60 0.75 1077 0.89...
  • Page 23 1. Boldface indicates a field-supplied drive is required. (See 5. Use of a field-supplied motor may affect wire sizing. Contact Note 6.) Carrier representative to verify. 6. Standard motor drive range: 840 to 1085 rpm. All other rpms re- Indicates field-supplied motor and drive are required.
  • Page 24 4. Values include losses for filters, unit casing, and wet coils. Note 6.) 5. Use of a field-supplied motor may affect wire sizing. Contact Carrier representative to verify. Indicates field-supplied motor and drive are required. 6. Standard motor drive range: 860 to 1080 rpm. All other rpms re- quire field-supplied drive.

  • Page 25: Pre-Start-Up

    PRE-START-UP START-UP Unit Preparation — Make sure that unit has been in- stalled in accordance with these installation instructions and applicable codes. Operating Parameters — The maximum outdoor Failure to observe the following warnings could result entering-air temperature is 115 F. The minimum entering in serious personal injury: outdoor-air temperature is 45 F without Motormaster ®...
  • Page 26 55 F or the damper reaches the fully open tor no. 2 (C2) is energized and compressor no. 2 starts. position. HEATING, 50GJ006 UNITS WITHOUT ECONOMIZER (If When the supply-air temperature is between 55 F and Accessory Heater is Installed) — Upon a call for heating 52 F, the supply-air thermostat has open switches between through terminal W1, IFC and heater contactor no.

  • Page 27: Service

    4. Remove device holding coil sections together at return HEATING, 50GJ006 UNITS WITH ECONOMIZER (If Ac- end of condenser coil. Carefully separate the outer coil cessory Heater is Installed) — Upon a call for heat through section 3 to 4 in.
  • Page 28 Fig. 33 — Propping Up Top Panel (50GJ008,012) Fig. 30 — Cleaning Condenser Coil (50GJ006) Fig. 34 — Separating Coil Sections (50GJ006) Fig. 31 — Cleaning Condenser Coil (50GJ008,012) Fig. 32 — Propping Up Top Panel Fig. 35 — Separating Coil Sections...
  • Page 29 (also refer to Table 1). Refer to If Chargemaster charging device is used, temperature and Carrier Standard Service Techniques Manual, Chapter 1, Re- pressure readings must be accomplished using the R-407C frigerants section. Unit must be charged with refrigerant R-407C.
  • Page 30 Fig 37 — Cooling Charging Chart — 50GJ006 Fig. 38 — Cooling Charging Charts, 50GJ008...
  • Page 31 Fig. 39 — Cooling Charging Charts, 50GJ012...

  • Page 32: Start-Up

    TROUBLESHOOTING Table 12 — Cooling Troubleshooting PROBLEM CAUSE REMEDY Compressor and Power failure. Call power company. condenser fan Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. will not start. Defective thermostat, contactor, transformer, or control Replace component. relay.
  • Page 33 Table 13 — Varislide™ Economizer Troubleshooting PROBLEM CAUSE REMEDY Damper does not Indoor (evaporator) fan 1. Check to ensure that 24 vac is present at terminal C1 on the IFC or that 24 vac open. is off. is present at the IFO terminal. Check whether 24 vac is present at PL6-1 (red wire) and/or PL6-3 (black wire).
  • Page 34 If any other readings are shown, replace the sensor. LED — Light-Emitting Diode Copyright 1995 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 111 Catalog No.

  • Page 36: Start-Up Checklist

    VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN CORRECT DIRECTION VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 30 AND 31. Copyright 1995 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

This manual is also suitable for:

50gj00850gj012

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