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HEATING & COOLING
48LJE/LJF004 48L J D/L J E/L J F005-007 Single-Package Rooftop Heating/Cooling Units
Installation, Start-Up, and Service Instructions
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CONTENTS |
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Page |
SAFETY CONSIDERATIONS ... |
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INSTALLATION ....................................................... |
1 19 |
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Step 1 — Provide Unit Support................................ |
1 |
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ROOF CURB |
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SLAB MOUNT |
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Step 2 — Field Fabricate Ductwork .........................
Step 3 — Install External Trap for
Condensate Drain ..................................................
Step 4 — Rig and Place Unit ....................................
• POSITIONING
Step 5 — Install Flue Hood........................................
Step 6 — Install Gas Piping .....................................
Step 7 — Make Electrical Connections...................
•FIELD POWER SUPPLY
•FIELD CONTROL WIRING
•HEAT ANTICIPATOR SETTINGS
Step 8 - Make Outdoor-Air Adjustments and |
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Install Outdoor-Air Hood....................................... |
10 |
• MANUAL OUTDOOR-AIR DAMPER |
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• TWO-POSITION DAMPER |
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OPTIONAL ECONOMIZER |
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Step 9 — Adjust Evaporator-Fan Speed.................. |
13 |
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DIRECT DRIVE MOTORS |
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BELT DRIVE MOTORS |
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START-UP................ |
20,21 |
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SERVICE .................. |
21-25 |
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TROUBLESHOOTING |
26-31 |
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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 apply.
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.
A WARNING
Disconnect gas piping from unit when leak testing at pressure greater than V2 psig. Pres sures greater than ’/2 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than ■ /2 psig, it must be replaced before use. When pressure testing field-supplied gas piping at pressures of V2 psig or less, a unit connected
i to such piping must be isolated by manually closing the gas valve(s).
A WARNING
Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury.
INSTALLATION
Unit is shipped in the vertical discharge configuration. To convert to horizontal configuration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulation-side down. Seals around duct openings must be tight. See Fig. 1.
IMPORTANT: An external filter kit MUST be used or the filters MUST be field-installed outside the unit on horizontal discharge applications with optional econ omizer. Otherwise, the economizer must be partially removed to access the filters. The area of the fieldinstalled filters should be equal to the area of the factoryinstalled filters.
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb in accordance with instructions shipped with curb. See Fig. 2. Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb, not to the unit. If gas, electric power, or control power is to be routed through the curb, attach the accessory thm-the-curb service connection plates to the roof curb in accordance with the accessory installation instmctions. Connection plates must be installed before unit can be set on roof curb.
IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket sup plied with the roof curb as shown in Fig. 2. Improp erly applied gasket can result in air leaks and poor unit performance.
Curb should be level. Unit leveling tolerances are shown in Fig. 3. This is necessary for unit drain to function prop erly. Refer to Accessory Roof Curb Installation Instruc tions 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.
Step 2 — Field Fabricate Ductwork — Secure all ducts to roof curb and building structure on vertical units.
Do not connect ductwork to unit. For horizontal applica tions, field-supplied flanges should be attached to horizon tal discharge openings and all ductwork should be secured to the flanges. Insulate and weatherproof all external duct work, joints, and roof openings with counter flashing andmastic in accordance with applicable codes.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
Book|1 |4 |
PC 111 |
Catalog No. 564-987 |
Printed in U S A |
Form 48LJ-7SI |
Pg 1 |
4-93 |
Replaces: 48LJ-5SI |
Tab la 6a |
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Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with ap plicable fire codes.
A minimum clearance is not required around ductwork. Cabinet return air static shall not exceed —.35 in. wg with economizer or — .45 in. wg without economizer.
Step 3 — Install External Trap for Condensate Drain — All units must have an external trap added for condensate drainage. A y4-in. NPT connection is located on the side of the unit. Use a trap at least 4-in. deep and protect against freeze-up.
If drain line is run to a drain, pitch line away from unit at 1 in. per 10 ft of run. Do not use a pipe size smaller than the unit connection. See Fig. 4 for more details.
Step 4 — Rig and Place Unit — Inspect unit for transportation damage. File any claim with transportation agency. Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 and Fig. 5 for additional infor mation. Operating weight is shown in Table 1 and Fig. 5.
Lifting holes are provided in base rails as shown in Fig. 6. Refer to rigging instructions on unit.
A CAUTION
I______ All panels must be in place when rigging._________ |
POSITIONING — Maintain clearance around and above unit to provide minimum distance from combustible mate rials, proper airflow, and service access. See Fig. 6. A prop
erly positioned unit will have the following clearances between unit and roof curb: 'A-in. clearance between roof curb and base rails on each side and front of unit; U/32-in. clearance between roof curb and rear of unit. (See Fig. 2, section C-C.)
Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of con taminated air.
Be sure that unit is installed such that snow will not block the combustion intake or flue outlet.
Unit may be installed directly on wood flooring or on Class A, B, or C roof-covering material when roof curb is used.
Although unit is weatherproof, guard against water from higher level runoff and overhangs.
Locate mechanical draft system flue assembly at least 48 in. from any opening through which combustion prod ucts could enter the building, and at least 48 in. from an adjacent building. When unit is located adjacent to public walkways, flue assembly must be at least 7 ft above grade.
Flue vent discharge must have a minimum horizontal clear ance of 4 ft from electric and gas meters, gas regulators, and gas relief equipment.
Flue gas can deteriorate building materials. Orient unit such that flue gas will not affect building materials.
Adequate combustion-air space must be provided for proper operation of this equipment. Be sure that installation complies with all local codes and Section 5.3, Air for Com bustion and Ventilation, NFGC (National Fuel Gas Code), ANSI (American National Standards Institute) Z223.1- 1984 and addendum Z223.la-1987. In Canada, instal lation must be in accordance with the CAN LB 149.1 and CAN1.B149.2 installation codes for gas burning appliances.
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ROOF CURB |
A |
UNIT SIZE |
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ACCESSORY |
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c |
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50DJ900771 |
1 '-2” |
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[356] |
48LJE/LJF004 |
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—!J |
- 1 |
50DJ900781 |
2"-0' |
48UD/LJE/UF005-007 |
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—1 |
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[610] |
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NOTES:
1.Roof curb accessory is shipped unassembled
2.Insulated panels.
3 Dimensions in [ ] are in millimeters
4. Roof Curb: galvanized steel
5Attach ductwork to curb (Flanges of duct rest on curb.)
6Service clearance is 4 ft on each side.
Direction of airflow
UNIT SIZE |
“E” |
“F” |
“G” |
CONNECTOR |
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GAS |
POWER |
CONTROL |
PKG ACY |
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48LJE/LJF004 |
%" [19] NPT |
%" [19] NPT |
3/4" [19] NPT |
50DJ900791 |
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48LJD/LJE/LJF005-007 |
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Fig. 2 — Roof Curb Dimensions
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B |
B-C |
A-C |
0.5 |
1.0 |
1.0 |
Fig. 3 — Unit Leveling Tolerances
/■
NOTE: Trap should be deep enough to offset maximum unit static difference, A 4-in. trap is recommended.
Fig. 4 — External Trap Condensate Drain
PLACE ALL SEAL STRIPS |
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IN PLACE BEFORE PLACING |
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UNIT ON ROOF CURB. |
DETAIL "A" |
SEE DETAIL DUCT END |
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"A" |
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NOTES:
1. Dimensions in ( ) are in miilimeters
2Hook 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 from damaging unit
3 Unit weights do not include economizer. See Table 1 for economizer weights.
A CAUTION
All panels must be in place when rigging.
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MAX |
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A |
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B |
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C |
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UNIT |
WEIGHT |
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Lb |
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Kg |
in. |
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mm |
in. |
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mm |
in. |
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mm |
48LJE/LJF004 |
530 |
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240 |
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48LJD/LJE/LJF005 |
540 |
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245 |
73.69 |
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1872 |
35.5 |
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902 |
32.52 |
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826 |
48LJD/LJE/LJF006 |
560 |
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254 |
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48LJD/LJE/LJF007 |
615 |
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279 |
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Fig. 5 — Rigging Details
Table 1 — Physical Data
BASE UNIT 48 |
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LJE/LJF004 |
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LJD/LJE/LJF005 |
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LJD/LJE/LJF006 |
LJD/LJE/LJF007 |
NOMINAL CAPACITY (tons) |
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3 |
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4 |
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5 |
6 |
OPERATING WEIGHT (lb) |
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Unit |
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530 |
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540 |
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560 |
615 |
Economizer |
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34 |
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34 |
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34 |
34 |
Roof Curb |
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115 |
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115 |
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115 |
115 |
COMPRESSOR |
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Reciprocating |
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Scroil |
Reciprocating |
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Quantity |
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1 |
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1 |
1 |
1 |
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Oil (oz) |
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55 |
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55 |
70 |
65 |
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REFRIGERANT TYPE |
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R-22 |
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Operating Charge (Ib-oz) |
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6-0 |
7-6 |
8-3 |
9-12 |
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CONDENSER FAN |
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Propeiier Type |
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Quantity...Diameter (in.) |
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1 ..26.0 |
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1 ..26.0 |
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1...26.0 |
1 . 26.0 |
Nominal Cfm |
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4600 |
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4600 |
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4100 |
4i00 |
Motor Hp...Rpm |
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Уз 850 |
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Уз...850 |
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У3...850 |
Уз . 850 |
CONDENSER COIL |
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Enhanced Copper Tubes, Aiuminum Lanced Fins |
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Rows...Fins/in. |
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1.. 17 |
2.. 17 |
2.. 17 |
2.. 17 |
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Total Face Area (sq ft) |
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12 25 |
12.25 |
12.25 |
12.25 |
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EVAPORATOR FAN |
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10 X 10 |
Centrifugai Type |
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Size (in.) |
Std |
10 X 10 |
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10 X 10 |
10 X 10 |
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Type Drive |
Direct |
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Direct |
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Beit |
Beit |
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Alt |
Direct |
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Beit |
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— |
— |
Nominal Cfm |
Std |
1200 |
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1600 |
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2000 |
2400 |
Maximum Continuous Bhp |
34 |
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.81 |
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1 80 |
2 40 |
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Alt |
81 |
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1 20 |
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— |
— |
Motor Frame |
Std |
48 |
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48 |
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56 |
56 |
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Alt |
48 |
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56 |
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— |
— |
Nominal Rpm High/Low |
Std |
860/845 |
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1080/970 |
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— |
— |
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Ait |
1080/970 |
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— |
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— |
— |
Fan Rpm Range |
Std |
— |
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_ |
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900-1300 |
1070-1460 |
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Alt |
— |
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970-1310 |
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— |
— |
Motor Bearing Type |
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Baii |
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Bali |
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Baii |
Bail |
Maximum Fan Rpm |
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2100 |
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2100 |
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2100 |
2100 |
Motor Pulley Pitch Diameter A/B (in.) |
Std |
— |
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— |
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2 4/3 4 |
2.8/3.8 |
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Alt |
— |
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1 9/2 9 |
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— |
— |
Fan Pulley Pitch Diameter (in.) |
Std |
— |
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— |
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4.5 |
45 |
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Alt |
— |
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3.5 |
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— |
— |
Belt — Type...Length (in.) |
Std |
— |
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— |
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A 39 |
A 39 |
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Alt |
— |
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A 31 |
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— |
— |
Pulley Center Line Distance (in.) |
Std |
— |
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— |
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14 7-15.5 |
14 7-15 5 |
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Alt |
— |
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14 7-15 5 |
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— |
— |
Speed Change Per Full Turn of |
Std |
— |
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— |
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80 |
79 |
Moveable Pulley Flange (rpm) |
Alt |
— |
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68 |
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— |
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Movable Pulley Maximum Full Turns |
Std |
— |
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— |
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5 |
5 |
From Closed Position |
Alt |
— |
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5 |
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_ |
— |
Factory Setting — Full Turns Open |
Std |
— |
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— |
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3 |
3 |
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Alt |
— |
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3 |
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— |
— |
Factory Speed Setting (rpm) |
std |
— |
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— |
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1060 |
1230 |
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Alt |
— |
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1110 |
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— |
— |
Fan Shaft Diameter at Pulley (in.) |
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— |
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5/8 |
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У2 |
Ув |
EVAPORATOR COIL |
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Enhanced Copper Tubes, Aluminum Doubie Wavy Fins, Acutroi'“ Feed Device |
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Rows...Fins/in. |
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2. 15 |
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2.. 15 |
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3.. 15 |
4...15 |
Total Face Area (sq ft) |
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4 17 |
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55 |
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55 |
5.5 |
FURNACE SECTION |
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Burner Orifice Diameter (in. ...drill size)* |
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113. 33/113 33/129 30 |
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113. 33/113 33/129. 30 |
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Natural Gas — Std |
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113 33 |
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113 33/113 33/.129.30 |
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Liquid Propane — Alt |
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089 43 |
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.089.. 43/089 .43/.102 .38 |
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089 43/089 43/102 38 |
089 43/089 43/102 38 |
Thermostat Heat Anticipator Setting (amps) |
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208/230/460 V |
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.14 |
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14 |
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First Stage |
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.14 |
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14 |
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Second Stage |
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-/14 |
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-/-/14 |
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-/-/14 |
-/-/14 |
Gas Input |
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First Stage |
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74,000/82,000 |
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74,000/115,000/120,000 |
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74,000/115,000/120,000 |
74,000/115,000/120,000 |
Second Stage |
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-/115,000 |
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-/-/150,000 |
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-/-/150,000 |
-/-/150,000 |
Efficiency (Steady State) (%) |
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80 |
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80 |
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80 |
80 |
Temperature Rise Range |
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25-55/55-85 |
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25-55/35-65/50-80 |
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25-55/35-65/50-80 |
25-55/35-65/50-80 |
Manifold Pressure (in. wg) |
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35 |
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Natural Gas — Std |
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35 |
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35 |
3.5 |
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Liquid Propane — Alt |
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3.5 |
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3.5 |
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3.5 |
3.5 |
Field Gas Connection Size (in.) |
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.5 |
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.5 |
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.5 |
.5 |
HIGH-PRESSURE SWITCH (psig)t |
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Standard Compressor Internal Relief |
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625 |
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Cutout |
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428 |
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Reset (Auto.) |
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320 |
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LOSS-OF-CHARGE/LOW-PRESSURE SWITCHf |
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(liquid Line) (psig) |
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Cutout |
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7 ± 3 |
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Reset (Auto.) |
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22 ± 7 |
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FREEZE PROTECTION THERMOSTATf |
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30 ± 5 |
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Opens (F) |
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Closes (F) |
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45 ± 5 |
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OUTDOOR-AIR INLET SCREENS |
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Cieanabie |
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Qty...Size (in.) |
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1 ..20 X 24 X 1 |
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RETURN-AIR FILTERS |
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Throwaway |
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Qty...Size (in.) |
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2.. 16 X 25 X 2 |
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LEGEND
Bhp — Brake Horsepower
*The 48LJD005-007 and 48LJE004 (74,000 Btuh) units have 2 burners The 48LJE005-007 and 48LJF004 (115,000 Btuh) units and the 48LJF005-007 (150,000 Btuh) units have 3 burners
flndioates a FlOP (Factory-instalied Option) that requires a control kit.
RIGHT SIDE
'Indicates horizontal center of gravity flndicates vertical center of gravity
NOTES:
1. Dimensions in [ ] are in millimeters.
Center of Gravity.
3 |
Direction of airflow |
4.On vertical discharge units, ductwork is to be attached to accessoiy roof curb only. For hor izontal discharge units, field-supplied flanges should be attached to horizontal discharge openings and all ductwork should be at tached to the flanges.
5Minimum clearances are as follows (local codes or jurisdiction may prevail):
NOTE: When installing these units, use the maximum clearance stated for your application
aBetween unit, flue side, and combustible surfaces, 36 inches. (Minimum clearance to combustibles, flue side, is 18 in for units with accessory flue discharge deflector.)
b.Bottom to combustible surfaces (when not using curb), 0 in. for LJD,LJE units and
1in. for LJF units.
c.Condenser coil for proper airflow, 36-in one side, 12 in the other The side getting the greater clearance is optional
d.Overhead, 60 in to assure proper con denser fan operation
e.Horizontal supply and return end, 0 inches
f Between units, control box side, 42 in per NEC (National Electrical Code),
g Between unit and ungrounded surfaces, con trol box side, 36 in. per NEC.
h.Between unit and block or concrete walls and other grounded surfaces, control box
side, 42 in. per NEC.
6. With the exception of the clearance for the condenser coil and combustion side, as stated in Notes 5a, b, and c, a removable fence or barricade requires no clearance
7Units may be instailed on combustible floors made from wood or class A, B, or C roof cov ering material
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STD UNIT |
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ECONOMIZER |
CORNER |
CORNER |
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UNIT |
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WEIGHT |
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WEIGHT |
WEIGHT (A) |
WEIGHT (B) |
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Lb |
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Kg |
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Lb |
Kg |
Lb |
Kg |
Lb |
Kg |
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48LJE/LJF004 |
530 |
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240 |
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34 |
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15.4 |
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104 |
47.2 |
97 |
44.0 |
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48LJD/LJE/UF005 |
540 |
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245 |
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34 |
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15.4 |
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106 |
48 1 |
98 |
44.5 |
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48UD/UE/UF006 |
560 |
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254 |
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34 |
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154 |
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110 |
49.9 |
102 |
46 3 |
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48UD/UE/UF007 |
615 |
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279 |
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34 |
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154 |
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120 |
54.4 |
112 |
50.8 |
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CORNER |
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CORNER |
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UNIT |
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WEIGHT (C) |
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WEIGHT (D) |
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Lb |
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Kg |
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Lb |
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Kg |
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48LJE/LJF004 |
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159 |
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72.1 |
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171 |
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77.6 |
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48LJD/LJE/LJF005 |
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162 |
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73.5 |
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174 |
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78.9 |
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48LJD/LJE/LJF006 |
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168 |
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76.2 |
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180 |
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81.6 |
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48LJD/LJE/LJF007 |
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185 |
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83.9 |
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198 |
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89.8 |
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FRONT
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Connection Sizes |
A |
1%" Dia [351 Field Power Supply Hole |
B |
2" Dia [50.51 Power Supply Knockout |
c |
2¥i6" Dia [551 Charging-Port Hole |
D |
%" [221 Field Control Wiring Hole |
E |
%" Condensate Drain |
F |
V2"-14 NPT Gas Connection |
O'-O 3/B r’OJ
LEFT SIDE |
FRONT |
L
Fig. 6 — Base Unit Dimensions
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Step 5 — Install Flue Hood — Flue hood and screen |
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are shipped screwed to the burner compartment access panel. |
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Remove from shipping location and using screws provided, |
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install flue hood and screen in location shown in Fig. 7. |
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Step 6 — Install Gas Piping — Unit is equipped for |
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use with type of gas shown on nameplate. Refer to local |
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building codes, or in the absence of local codes, to ANSI |
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Z223.1-1984 and addendum Z223-1A-1987 entitled Na |
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tional Fuel Gas Code. In Canada, installation must be in |
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accordance with the CANl.B 149.1 and CAN1.B149.2 in |
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stallation codes for gas burning appliances. |
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For natural gas applications, gas pressure at unit gas con |
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nection must not be less than 4 in. wg or greater than |
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13.0 in. wg while unit is operating. On 48LJ005,006,007 |
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high heat units, the gas pressure at unit gas connection must |
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not be less than 5 in. wg or greater than 13 in. wg while the |
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unit is operating. For propane applications, the gas pressure |
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must not be less than 5 in. wg or greater than 13 in. wg at |
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the unit connection. |
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Size gas supply piping for 0.5 in. wg maximum pressure |
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drop. Do not use supply pipe smaller than unit gas connec |
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tion. Support gas piping as shown in the table in Fig. 8. For |
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example, a %-in. gas pipe must have one field-fabricated |
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support beam every 8 ft. Therefore, an 18-ft long gas pipe |
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would have a minimum of 2 support beams, a 48-ft long |
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pipe would have a minimum of 6 support beams. |
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See Fig. 8 for typical pipe guide and locations of exter |
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nal manual main shutoff valve. |
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9” MINIMUM CLEARANCE |
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FOR PANEL REMOVAL |
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MANUAL GAS |
GAS |
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I SHUTOFF VALVE* REGUUTOR* |
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48" MINIMUM - |
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DRIP LEG PER NFGC |
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ROOF CURB |
FIELD- |
FABRICATED* |
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7 |
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FROM GAS METER |
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SUPPORT |
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LEGEND |
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SPACING OF SUPPORTS |
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NFGC — National Fuel Gas Code |
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STEEL PIPE |
X |
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"Field supplied. |
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NOMINAL |
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DIMENSIONS |
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NOTE: Follow all local codes |
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DIAMETER |
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(feet) |
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(In.) |
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% |
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6 |
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*/4or 1 |
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8 |
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1’/4 or larger |
10 |
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Fig. 8 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
Step 7 — Make Electrical Connections
A WARNING
Unit cabinet must have an uninterrupted, unbroken elec trical ground to minimize the possibility of personal in jury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for elec trical ground when installed in accordance with NEC (National Electrical Code), ANSI/NFPA (National Fire Protection Association), latest edition, and local elec trical codes. Do not use gas piping as an electrical ground.
Failure to follow this warning could result in the in staller being liable for personal injury of others.
FIELD POWER SUPPLY - All units except 208/230-v units are factory wired for the voltage shown on the name plate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire from the 230-v orange wire on the trans former and connecting it to the 200-v red wire from the transformer. The end of the orange wire must then be insulated.
Refer to unit label diagram for additional information. Wiring leads are provided for field service. Use copper con ductors only when splice connectors are used.
When installing units, provide a disconnect per NEC.
All field wiring must comply with NEC and local require ments. In Canada, electrical connections must be in accor dance with CSA (Canadian Standards Association) C22.1 Canadian Electrical Code Part 1.
Install conduit through side panel openings indicated in Fig. 6. Route power lines through connector to terminal connections as shown in Fig. 9.
Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate (also see Table 2). On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in the legend for Table 2, Note 2 to determine the percent voltage imbalance. Operation on im proper line voltage or excessive phase imbalance consti tutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.
FIELD CONTROL WIRING - Install a Carrier-approved accessory thermostat assembly according to installation in structions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat instal lation instmctions. Connect thermostat wires to terminal board.
Route thermostat cable or equivalent single leads of col ored wire from subbase terminals through connector on unit to low-voltage connections (shown in Fig. 10).
Connect thermostat wires to matching screw terminals of low-voltage connection board. See Fig. 10.
NOTE; For wire runs up 50 ft, use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over 75 ft, use no. 14 AWG insulated wire (35 C min imum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.
Pass the control wires through the hole provided in the end panel; then feed wires through the raceway built into the comer post to the 24-v barrier located on the left side of the control box. See Fig. 11. The barrier provides the UL (Underwriters’ Laboratories) required clearance between highand low-voltage wiring.
Table 2 — Electrical Data
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NOMINAL |
IFM |
VOLTAGE |
COMPR |
OFM |
IFM |
COMBUSTION |
POWER SUPPLY |
DISCONNECT SIZE |
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UNIT |
RANGE |
(each) |
FAN MOTOR |
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V-PH-HZ |
TYPE |
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Min |
Max |
RLA |
LRA |
FLA |
FLA |
FLA |
MCA |
MOCP* |
FLA |
LRA |
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208/230-1-60 |
Std |
187 |
254 |
179 |
93 |
1 9 |
2.8 |
57 |
27 1/27 1 |
35/35 |
26/26 |
105/105 |
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Alt |
3.8 |
28.1/28 1 |
35/35 |
27/27 |
107/107 |
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208/230-3-60 |
Std |
187 |
254 |
11 2 |
80 |
1 9 |
28 |
.57 |
18 7/18.7 |
25/25 |
18/18 |
92/92 |
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48LJE/LJF004 |
Alt |
38 |
19 7/19.7 |
25/25 |
19/19 |
94/94 |
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(3 Tons) |
460-3-60 |
Std |
414 |
508 |
6 1 |
40 |
1 0 |
1 5 |
30 |
101 |
15 |
10 |
46 |
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Alt |
1.9 |
105 |
15 |
10 |
46 |
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575-3-60 |
Std |
518 |
632 |
45 |
29 |
1 9 |
2.8 |
57 |
7.5 |
15 |
7 |
34 |
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Alt |
38 |
7.9 |
15 |
8 |
34 |
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208/230-1-60 |
Std |
187 |
254 |
24 8 |
127 |
1 9 |
38 |
57 |
36 7/36.7 |
45/45 |
35/35 |
141/141 |
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Alt |
57 |
38.6/38 6 |
45/45 |
37/37 |
144/144 |
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48LJD/LJE/LJF |
208/230-3-60 |
Std |
187 |
254 |
157 |
99 |
1.9 |
3.8 |
57 |
25 3/25.3 |
30/30 |
25/25 |
113/113 |
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Alt |
5.7 |
27 2/27.2 |
35/35 |
27/27 |
116/116 |
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005 |
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Std |
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1 0 |
1 9 |
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126 |
15 |
12 |
56 |
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(4 Tons) |
460-3-60 |
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414 |
508 |
78 |
50 |
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.30 |
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Alt |
2.8 |
13.5 |
20 |
13 |
58 |
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575-3-60 |
Std |
518 |
632 |
55 |
40 |
1.9 |
38 |
57 |
9.2 |
15 |
9 |
45 |
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Alt |
5.7 |
9.9 |
15 |
10 |
47 |
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48LJD/LJE/LJF |
230-1-60 |
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187 |
254 |
27.8 |
135 |
1 9 |
85 |
.57 |
45 2 |
60 |
44 |
164 |
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208/230-3-60 |
Std |
187 |
254 |
19.2 |
105 |
1 9 |
8.5 |
.57 |
34.4/34.4 |
40/40 |
34/34 |
134/134 |
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006 |
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460-3-60 |
414 |
508 |
96 |
55 |
1 0 |
4.5 |
30 |
17.5 |
20 |
17 |
81 |
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(5 Tons) |
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575-3-60 |
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518 |
632 |
83 |
45 |
1 9 |
85 |
.57 |
14.5 |
20 |
14 |
57 |
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48LJD/LJE/LJF |
208/230-3-60 |
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187 |
254 |
21 9 |
142 |
1 9 |
5.8 |
57 |
35.1/35.1 |
40/40 |
34/34 |
188/188 |
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007 |
460-3-60 |
Std |
414 |
508 |
104 |
72 |
1 0 |
2.6 |
30 |
16.6 |
20 |
16 |
95 |
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(6 Tons) |
575-3-60 |
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518 |
632 |
96 |
58 5 |
1 9 |
11 0 |
57 |
172 |
20 |
17 |
81 |
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IMPORTANT: Optional, alternate evaporator-fan motor and drive are not available for 48LJ006,007 units. Contact your local Carrier representative for more information about field-installed motors
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LEGEND |
COMPR |
Compressor |
FLA |
Full Load Amps |
HACR |
Heating, Air Conditioning and Refrigeration |
IFM |
Indoor (Evaporator) Fan Motor |
LRA |
Locked Rotor Amps |
MCA |
Minimum Circuit Amps |
MOCP |
Maximum Overcurrent Protection |
OFM |
Outdoor (Condenser) Fan Motor |
RLA |
Rated Load Amps |
*Fuse or HACR circuit breaker
NOTES:
1.In compliance with NEC (National Electrical Code) requirements for multi motor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shali be fuse or HACR breaker Canadian Standards Association (CSA) units may be fuse or circuit breaker
2 Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalanoe in supply voltage is greater than 2% Use the following formula to determine the percent voltage im balance.
% Voltage Imbalance
max voltage deviation from average voltage
100 X
average voltage
Example: Supply voltage is 460-3-60.
AB = 452V ABC BC = 464v
AC = 455V
452 4- 464 4- 455
Average Voltage
_ 1371 3
= 457
NOTE: The 575-v units are CSA only
Determine maximum deviation from average voltage (AB) 457 - 452 = 5 V
(BC) 464 - 457 = 7 V
(AC) 457 - 455 = 2 V
Maximum deviation is 7 v.
Determine % voltage imbalance
7 % Voltage Imbalance = 100 x -----------
457
= 1 53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately
c |
LEGEND |
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Contactor |
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COMP |
Compressor |
TO |
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EQUIP |
Equipment |
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GND |
Ground |
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IFC |
Indoor (Evaporator) Fan Contactor |
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NEC |
National Electrical Code |
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208 / 230-3-60 |
FIELD POWER SUPPLY |
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460-3-60 |
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(SIZES 004-006) |
DISCONNECT |
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575-3-60 |
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(SIZES 004-007) |
PER NEC |
Fig. 9 — Power Wiring Connections
c
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LEGEND |
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AHA |
Adjustable Heat |
TH — Thermostat-Heating |
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CC |
Anticipator |
--------- Field Wiring |
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Cooling Compensator |
---------- Factory Wiring |
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TC |
Thermostat-Cooling |
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NOTE: Connect Y2 when unit is equipped with an economizer.
CONNECTION BOARD LED |
INTEGRATED GAS UNIT |
|
CONTROLLER (IGC) |
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RACEWAY
HOLE IN END
PANEL---
(HIDDENV
LED — Light-Emitting Diode
Fig. 11 — Fieid Control Wiring Raceway
Fig. 10 - Low-Voitage Connections
HEAT ANTICIPATOR SETTINGS - Set heat anticipator settings at. 14 amp for the first stage and . 14 amp for secondstage heating, when available.
Step 8 - Make Outdoor-Air Adjustments and
Install Outdoor-Air Hood
MANUAL OUTDOOR-AIR DAMPER - The outdoor-air hood and screen are attached to the basepan at the bottom of the unit for shipping.
Assembly:
1.Determine quantity of ventilation required for building. Record amount for use in Step 8.
2.Remove and save evaporator coil access panel and screws. See Fig. 12.
3.Separate hood and screen from basepan by removing the 4 screws securing them. Save all screws.
EVAPORATOR
COIL ACCESS ?
PANEL \
SCREWS (SIDE) “
MANUAL
OUTDOOR-AIR »
ADJUSTMENT
SCREWS
POSITION
SETTING SCALE
Fig. 12 — Damper Panel with Manual Outdoor-Air Damper Installed
4.Replace evaporator coil access panel.
5.Place hood on front of evaporator coil access panel. See Fig. 13 for hood details. Secure top of hood with the 4 screws removed in Step 3. See Fig. 14.
6.Remove and save 6 screws (3 on each side) from sides of the manual outdoor-air damper.
7.Align screw holes on hood with screw holes on side of manual outdoor-air damper. See Fig. 13 and 14. Secure hood with 6 screws from Step 6.
8.Adjust minimum position setting of the damper blade by adjusting the manual outdoor air adjustment screws on the front of the damper blade. See Fig. 12. Slide blade vertically until it is in the appropriate position deter mined by Fig. 15. Tighten screws.
9.Remove and save screws currently on sides of hood. In sert screen. Secure screen to hood using the screws. See Fig. 14.
SCREW HOLES (TOP)
HOOD
HOOD
SCREEN LOCATION (SCREEN NO SHOWN)
Fig. 14 Outdoor-Air Damper with Hood Attached
OUTDOOR AIRFLOW (cfm x 100)
Fig. 15 - Position Setting
10
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