Bryant Air Handling Units 524J User Manual

524J  
PACKAGED AIR-HANDLING UNITS, 60 Hz  
WITH PURONR (R-410A) REFRIGERANT  
SIZES 25, 28, 30  
Installation, Start--Up  
and Service Instructions  
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
TABLE OF CONTENTS  
Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . 22  
Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . . . . 22  
Replacing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . 35-36  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1  
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Moving and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Refrigerant Piping Access . . . . . . . . . . . . . . . . . . . . 11  
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . . . 15  
Power Supply and Wiring . . . . . . . . . . . . . . . . . . . . 15  
Connecting Ductwork . . . . . . . . . . . . . . . . . . . . . . . 17  
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19–32  
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . 20  
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . 20  
Fan Shaft Position Adjustment . . . . . . . . . . . . . . . . 20  
Individual Fan Wheel Adjustment . . . . . . . . . . . . . . 21  
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . 21  
Pulley and Drive Adjustment . . . . . . . . . . . . . . . . . . 21  
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
SAFETY CONSIDERATIONS  
Improper installation, adjustment, alteration, service,  
maintenance, or use can cause explosion, fire, electrical  
shock or other conditions which may cause personal  
injury or property damage. Consult a qualified installer,  
service agency, or your distributor or branch for  
information or assistance. The qualified installer or  
agency must use factory-authorized kits or accessories  
when modifying this product. Refer to the individual  
instructions package  
Follow all safety codes. Wear safety glasses and work  
gloves. Use quenching cloths for brazing operations and  
have a fire extinguisher available. Read these instructions  
thoroughly and follow all warnings or cautions attached to  
the unit. Consult local building codes and appropriate  
national electrical codes (in USA, ANSI/NFPA70,  
National Electrical Code (NEC); in Canada, CSA C22.1)  
for special requirements.  
It is important to recognize safety information. This is the  
safety-alert symbol  
. When you see this symbol on the  
unit and in instructions or manuals, be alert to the  
potential for personal injury.  
Understand the signal words DANGER, WARNING,  
CAUTION, and NOTE. These words are used with the  
safety-alert symbol. DANGER identifies the most serious  
hazards which will result in severe personal injury or  
death. WARNING signifies hazards which could result in  
personal injury or death. CAUTION is used to identify  
unsafe practices, which may result in minor personal  
injury or product and property damage. NOTE is used to  
highlight suggestions which will result in enhanced  
installation, reliability, or operation.  
Table 1A — 524J***A Physical Data, English — Cooling Units  
UNIT 524J*  
25A  
28A  
30A  
NOMINAL CAPACITY (Tons)  
OPERATING WEIGHT (lb)  
Base Unit with TXV  
Plenum  
20  
25  
30  
730  
225  
1050  
325  
1062  
325  
FANS  
Qty...Diam. (in.)  
2...15  
8000  
2...18  
10000  
2...18  
12000  
Nominal Airflow (cfm)  
Airflow Range (cfm)  
Nominal Motor Hp (Standard Motor)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
6000 – 10000  
7500 – 12500  
9000 – 15000  
5.0  
5.0  
7.5  
7.5  
10.0  
10.0  
Motor Speed (rpm)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
1745  
1745  
1745  
1755  
1745  
1755  
REFRIGERANT  
R---410A  
Operating charge (lb)  
(approx per circuit)*  
3.5  
4.5  
5.0  
DIRECT---EXPANSION COIL  
Max Working Pressure (psig)  
Face Area (sq ft)  
Enhanced Copper Tubes, Aluminum Sine---Wave Fins  
650  
19.88  
2
24.86  
29.83  
2
No. of Splits  
2
20  
No. of Circuits per Split  
Split Type...Percentage  
Rows...Fins/in.  
18  
24  
Face...50/50  
4...15  
4...15  
4...15  
PIPING CONNECTIONS,  
Quantity...Size (in.)  
1
3
3
DX Coil — Suction (ODF)  
DX Coil — Liquid Refrigerant (ODF)  
Steam Coil, In (MPT)  
2...1 /  
2...1 /  
5
2...1 /  
8
8
2
8
2... /  
1
8
1...2 /  
1
Steam Coil, Out (MPT)  
Hot Water Coil, In (MPT)  
Hot Water Coil, Out (MPT)  
Condensate (PVC)  
1... /  
2
1...2  
1...2  
1
1...1 / ODM/1 IDF  
4
FILTERS  
Throwaway — Factory Supplied  
4...16 x 20 x 2  
4...16 x 24 x 2  
4...20 x 24 x 2  
4...20 x 25 x 2  
Quantity...Size (in.)  
Access Location  
STEAM COIL**  
Either Side  
Max Working Pressure (psig at 260° F)  
Total Face Area (sq ft)  
Rows...Fins/in.  
20  
13.33  
1...10  
15.0  
1...10  
15.0  
1...10  
HOT WATER COIL**  
Max Working Pressure (psig)  
Total Face Area (sq ft)  
Rows...Fins/in.  
150  
15.0  
13.33  
15.0  
2...8.5  
2...12.5  
2...12.5  
Water Volume  
(gal)  
13.9  
14.3  
1.90  
3
(ft )  
LEGEND  
DX — Direct Expansion  
TXVThermostatic Expansion Valve  
*
**  
Units are shipped without refrigerant charge.  
Field installed accessory only.  
3
Table 1B —524J***A Physical Data, SI — Cooling Units  
UNIT 524J*  
25A  
28A  
30A  
NOMINAL CAPACITY (kW)  
OPERATING WEIGHT (kg)  
Base Unit with TXV  
Plenum  
70  
87  
105  
331  
102  
477  
148  
482  
148  
FANS  
Qty...Diam. (mm)  
2...381  
3775  
2...457  
4119  
2...457  
5663  
Nominal Airflow (L/s)  
Airflow Range (L/s)  
Nominal Motor kW (Standard Motor)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
2831 – 4719  
3539 – 5899  
4247 – 7079  
3.73  
3.73  
5.60  
5.60  
7.46  
7.46  
Motor Speed (r/s)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
29.1  
29.1  
29.1  
29.3  
29.1  
29.3  
REFRIGERANT  
R---410A  
Operating charge (kg)  
(approx per circuit)*  
1.59  
2.04  
2.27  
DIRECT---EXPANSION COIL  
Max Working Pressure (kPag)  
Face Area (sq m)  
Enhanced Copper Tubes, Aluminum Sine---Wave Fins  
4481  
1.85  
2
2.30  
2
2.77  
2
No. of Splits  
No. of Circuits per Split  
Split Type...Percentage  
Rows...Fins/m  
18  
20  
24  
Face...50/50  
4...591  
4...591  
4...591  
PIPING CONNECTIONS,  
Quantity...Size (in.)  
1
3
3
DX Coil — Suction (ODF)  
DX Coil — Liquid Refrigerant (ODF)  
Steam Coil, In (MPT)  
2...1 /  
2...1 /  
5
2...1 /  
8
8
2
8
2... /  
1
8
1...2 /  
1
Steam Coil, Out (MPT)  
Hot Water Coil, In (MPT)  
Hot Water Coil, Out (MPT)  
Condensate (PVC)  
1... /  
2
1...2  
1...2  
1
1...1 / ODM/1 IDF  
4
FILTERS  
Throwaway — Factory Supplied  
4...406 x 508 x 51  
4...406 x 610 x 51  
4...508 x 610 x 51  
4...508 x 635 x 51  
Either Side  
Quantity...Size (mm.)  
Access Location  
STEAM COIL**  
Max Working Pressure (kPag at 126° C)  
Total Face Area (sq m)  
Rows...Fins/m  
138  
1.39  
1.24  
1.39  
1...394  
1...394  
1...394  
HOT WATER COIL**  
Max Working Pressure (kPag)  
Total Face Area (sq m)  
Rows...Fins/m  
1034  
1.39  
1.24  
1.39  
2...335  
2...335  
2...335  
Water Volume  
(L)  
52.6  
54.1  
3
(m )  
0.052  
0.054  
LEGEND  
DX — Direct Expansion  
TXVThermostatic Expansion Valve  
*
**  
Units are shipped without refrigerant charge.  
Field installed accessory only.  
4
Table 1C — 524J*25H Physical Data, English — Heat Pump Units  
UNIT 524J*  
25H  
NOMINAL CAPACITY (Tons)  
20  
OPERATING WEIGHT (lb)  
Base Unit with TXV  
Plenum  
720  
140  
FANS  
Qty...Diam. (in.)  
2...15  
8000  
Nominal Airflow (cfm)  
Airflow Range (cfm)  
Nominal Motor Hp (Standard Motor)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
6000---10000  
5.0  
5.0  
Motor Speed (rpm)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
1745  
1745  
REFRIGERANT  
R---410A  
3.5/3.5  
Operating charge (lb)  
(approx per circuit)*  
DIRECT---EXPANSION COIL  
Max Working Pressure (psig)  
Face Area (sq ft)  
Enhanced Copper Tubes, Aluminum Sine---Wave Fins  
650  
19.9  
No. of Splits  
2
2
No. of Circuits per Split  
Split Type...Percentage  
Rows...Fins/in.  
Face....50/50  
4...15  
PIPING CONNECTIONS,  
Quantity...Size (in.)  
1/  
DX Coil — Suction (ODF)  
DX Coil — Liquid Refrigerant (ODF)  
Steam Coil, In (MPT)  
2...1  
8
5/  
2...  
8
1/  
1...2  
1...1  
2
2
1/  
Steam Coil, Out (MPT)  
Hot Water Coil, In (MPT)  
Hot Water Coil, Out (MPT)  
Condensate (PVC)  
1...2  
1...2  
1/  
1...1 ODM/1 IDF  
4
FILTERS  
Throwaway — Factory Supplied  
Quantity...Size (in.)  
4...16 x 20 x 2  
4...16 x 24 x 2  
Access Location  
Right or Left Side  
STEAM COIL**  
Max Working Pressure (psig at 260° F)  
Total Face Area (sq ft)  
Rows...Fins/in.  
20  
13.33  
1...10  
HOT WATER COIL**  
Max Working Pressure (psig)  
Total Face Area (sq ft)  
Rows...Fins/in.  
150  
13.33  
2...8.5  
Water Volume  
(gal)  
13.9  
1.85  
3
(ft )  
LEGEND  
DX — Direct Expansion  
TXVThermostatic Expansion Valve  
*
Units are shipped without refrigerant charge.  
**  
Field installed accessory only.  
5
Table 1D — 524J*25H Physical Data, SI — Heat Pump Units  
UNIT 524J*  
25H  
NOMINAL CAPACITY (kW)  
70  
OPERATING WEIGHT (kg)  
Base Unit with TXV  
Plenum  
326  
44  
FANS  
Qty...Diam. (mm)  
2...381  
3775  
Nominal Airflow (L/s)  
Airflow Range (L/s)  
Nominal Motor kW (Standard Motor)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
2831---4719  
3.73  
3.73  
Motor Speed (r/s)  
208/230---3---60 and 460---3---60  
5 7 5 --- 3 --- 6 0  
29.1  
29.1  
REFRIGERANT  
R---410A  
1.59/1.59  
Operating charge (kg)  
(approx per circuit)*  
DIRECT---EXPANSION COIL  
Max Working Pressure (kPag)  
Face Area (sq m)  
Enhanced Copper Tubes, Aluminum Sine---Wave Fins  
4482  
1.85  
No. of Splits  
2
No. of Circuits per Split  
Split Type...Percentage  
Fins/m  
2
Face...50/50  
591  
PIPING CONNECTIONS,  
Quantity...Size (in.)  
1/  
DX Coil — Suction (ODF)  
DX Coil — Liquid Refrigerant (ODF)  
Steam Coil, In (MPT)  
2...1  
8
5/  
2...  
8
1/  
1...2  
1...1  
2
2
1/  
Steam Coil, Out (MPT)  
Hot Water Coil, In (MPT)  
Hot Water Coil, Out (MPT)  
Condensate (PVC)  
1...2  
1...2  
1/  
1...1 ODM/1 IDF  
4
FILTERS  
Throwaway — Factory Supplied  
4...406 x 610 x 51  
4...406 x 508 x 51  
Quantity...Size (mm)  
Access Location  
Right or Left Side  
STEAM COIL**  
Max Working Pressure (kPag at 126° C)  
Total Face Area (sq m)  
Rows...Fins/m  
138  
1.24  
1...394  
HOT WATER COIL**  
Max Working Pressure (kPag)  
Total Face Area (sq m)  
Rows...Fins/m  
1034  
1.24  
2...335  
Water Volume  
(L)  
52.6  
3
(m )  
0.052  
LEGEND  
DX — Direct Expansion  
TXVThermostatic Expansion Valve  
*
Units are shipped without refrigerant charge.  
**  
Field installed accessory only.  
6
LEGEND  
TXV — Thermostatic Expansion Valve  
NOTES:  
1. Dimensions in [ ] are in millimeters.  
2.  
Direction of airflow.  
3. Recommended clearance:  
• Rear: 3 in. [914 mm] (2 ft, 6 in. [762 mm]  
with electric heat accessory)  
• Front: 2 ft, 6 in. [762 mm]  
• Right Side: 2 ft, 6 in. [762 mm]  
• Left Side: 2 ft, 6 in. [762 mm]  
• Local codes or jurisdiction may prevail.  
4. Liquid piping not supplied by Carrier.  
5. Duct flange is factory supplied and field  
installed.  
UNIT WEIGHT  
UNIT  
lb (kg)  
524J*25A  
524J*25H  
730 (331)  
720 (326)  
C10834  
Fig. 1 - Dimensions – Size 25  
7
LEGEND  
TXV — Thermostatic Expansion Valve  
NOTES:  
1. Dimensions in [ ] are in millimeters.  
2.  
Direction of airflow.  
3. Recommended clearance:  
• Rear: 3 in. [914 mm] (2 ft, 6 in. [762 mm]  
with electric heat accessory)  
• Front: 2 ft, 6 in. [762 mm]  
• Right Side: 2 ft, 6 in. [762 mm]  
• Left Side: 2 ft, 6 in. [762 mm]  
• Local codes or jurisdiction may prevail.  
4. Liquid piping not supplied by Carrier.  
5. Duct flange is factory supplied and field  
installed.  
6. 40RUS may require alternate or additional  
field favricated poping access holes  
UNIT  
lb (kg)  
524J*28A  
524J*30A  
1050 (477)  
1062 (482)  
C10835  
Fig. 2 - Dimensions – Sizes 28 and 30  
8
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17  
5
2
4
J
E
2
5
A
0
0
0
A
2
0 A A A  
____  
_____________  
Model Type  
Packaging  
524J = Bryant Fan Coil  
Puronr R---410A Refrigerant  
A = Standard  
Not Used  
A = Not Used  
Voltage  
E = 460/3/60  
P = 208/230/3/60  
T = 575/3/60  
Service Options  
A = None  
B = Painted Cabinet  
Nominal Tonnage  
25 = 20 Tons  
28 = 25 Tons  
30 = 30 Tons  
Not Used  
0 = Not Used  
Indoor Fan Options  
1 = Fan Drive and Motor - Low / Motor Efficency - Standard  
2 = Fan Drive and Motor - Med / Motor Efficency - Standard  
3 = Fan Drive and Motor - High / Motor Efficency - Standard  
Type of Coil  
A = Standard DX Coil  
B = High Capacity DX Coil  
H = DX Coil for Heat Pump Duty  
Coil Options  
A = Al/Cu  
Not Used  
Not Used  
0 = Not Used  
0 = Not Used  
Not Used  
0 = Not Used  
C10837  
Fig. 3 - Model Number Nomenclature  
POSITION NUMBER  
TYPICAL  
1
2
2
6
3
1
4
0
5
G
6
1
7
2
8
3
9
4
10  
5
POSITION  
1−2  
DESIGNATES  
Week of manufacture (fiscal calendar)  
3−4  
Year of manufacture (“10” = 2010)  
5
Manufacturing location (G = ETP, Texas, USA)  
Sequential number  
6−10  
C!0725  
Fig. 4 - Serial Number Nomenclature  
TXV  
COIL  
horizontally and the supply air discharging horizontally.  
When applying the unit in a horizontal arrangement,  
ensure the condensate drain pan is located at the bottom  
center of the unit for adequate condensate disposal. See  
Fig. 6 for condensate connections for each unit position.  
PLUG  
PLUG  
CONDENSATE  
DRAIN  
REMOVE FOAM BLOCK  
LEGEND  
LEGEND  
Accessory Line  
Alternate Air Intake and Discharge  
TXV — Thermostatic Expansion Valve  
C10683  
Air Intake and Discharge  
Fig. 5 - Foam Block Location  
Note: Maintain recommended clearances  
per Fig. 1 and Fig. 2  
Unit Positioning - The unit can be mounted on the floor  
for vertical application with return air entering the face of  
the unit and supply air discharging vertically through the  
top of the unit. The unit can also be applied in a  
horizontal arrangement with return air entering  
C10684  
Fig. 6 - Typical Unit Positioning  
9
Typical positioning and alternate return air locations are  
shown in Fig. 6. Alternate return air locations can be used  
by moving the unit panel from the alternate return air  
location to the standard return air location. Refer to  
overhead suspension accessory drawing (Fig. 7) for  
preferred suspension technique. The unit needs support  
underneath to prevent sagging.  
IMPORTANT: Do NOT attempt to install unit with return  
air entering top panel of unit. Condensate will not drain from  
unit.  
OVERHEAD SUSPENSION ACCESSORY — UNIT SIZE 25  
OVERHEAD SUSPENSION ACCESSORY — UNIT SIZES 28, 30  
NOTE: Dimensions in [ ] are millimeters  
C10728  
Fig. 7 - Preferred Suspension Technique  
10  
Unit Isolation - Where extremely quiet operation is  
essential, install isolators between floor and base of unit,  
or between ceiling and top section of unit.  
The 524J direct-expansion units have internal  
                                                                                                                                         
factory-installed thermostatic expansion valves (TXVs),  
distributors, and nozzles for use with R-410A. See Table 2  
for part numbers. Knockouts are provided in the unit corner  
posts for 524J refrigerant piping. See Fig. 8, which also lists  
recommended knockouts and access holes to use for each  
524J unit size. Recommended fittings are listed in Table 3.  
Be sure that unit is level and adequately supported. Use  
channels at front and sides of unit for reference points  
when leveling.  
Refrigerant Piping Access - The 524J Series units come  
with standard knockouts for refrigerant piping. These  
knockouts are located on both sides of the unit for  
installation flexibility. The standard knockouts provide  
sufficient access to the unit’s coils for all 524J*25A, 28A  
and 30A units. The 524J*25H requires additional holes  
which must be field-fabricated to accommodate the  
piping. See Fig. 8 for positions and dimensions for the  
additional access holes required. Recommended access  
hole use is also listed for all units. Note that Fig. 8 shows  
the access holes on the control-box side of the unit; this is  
the side of the unit with the coil headers, so it is used most  
often for piping access.  
The sensor bulb capillary tubes must be routed from the  
TXVs inside the unit through one of the piping access  
holes. Clamp the TXV sensor bulb on a vertical portion of  
the suction line, outside the unit. See Fig. 9.  
NOTE: Be sure to remove the styrofoam shipping pad  
from the TXV. Verify that it has been removed. See Fig. 5.  
IMPORTANT: Never attach the sensor to the suction  
manifold. Do NOT mount the sensor on a trapped portion  
of the suction line.  
The 524J Series evaporator coils have a face-split design.  
Ensure that lower circuit of coil is first on/last off when  
connected to the condensing unit and/or system controls.  
See Fig. 10.  
IMPORTANT: Do not bury refrigerant piping  
underground.  
External TXV equalizer connections are provided and  
factory-brazed into the coil suction manifolds.  
Refrigerant Piping - See Tables 1A–1D for refrigerant  
pipe connection sizes. For ease in brazing, it is  
recommended that all internal solder joints be made  
before unit is placed in final position.  
If suction line must be horizontal, clamp bulb to suction  
line at least 45 degrees above bottom, at approximately  
the 4 o’clock or 8 o’clock position. See Fig.11.  
7
6
5
4
C
B
A
3
2
1
C10838  
FIELD--FABRICATED HOLE DIAMATERS  
in. (mm)  
FIELD--FABRICATED HOLE POSITION DIMENSIONS  
in. (mm)  
USE HOLE  
NUMBERS  
UNIT  
No. 5  
No. 6  
No. 7  
A
B
C
524J*25A, 28A, 30A  
524J*25H  
1,2, 3, 4  
1
1
3
3*, 5, 6, 7  
1 / (28.6)  
1 / (28.6)  
1 / (44.5)  
3.25 (82.6)  
6.125 (155.6)  
10.38 (263.7)  
8
8
4
1
3
*Must be enlarged from 1 / in. (28.6mm) to 1 / in. (44.5mm)  
8
4
N OTE : A cce ss ho l e k no ck o ut s 1 --- 4 a re f a ct o ry --- sup p l i e d .  
Fig. 8 - Refrigerant Piping Access Holes  
11  
EQUALIZER LINE  
TXV  
UPPER  
SPLIT  
SENSING  
BULB  
SOLENOID  
VALVE  
SIGHT  
GLASS  
TXV  
AIRFLOW  
15 DIAMS  
MIN  
10  
DIAMS  
8 DIAMS  
MIN  
EQUALIZER  
FILTER  
DRIER  
LINE  
TXV  
SENSING  
BULB  
LOWER  
SPLIT  
TXV  
AIRFLOW  
15 DIAMS  
MIN  
10  
DIAMS  
8 DIAMS  
MIN  
INDOOR  
COIL  
LEGEND:  
TXV – Thermostatic Expansion Valve  
NOTE: Component location arrangemetshown for field installation of  
sight glasses, solenoid valves, filter driers, and TXV sensing bulbs.  
The TXVs and equilizer lines are factory installed.  
C10726  
Fig. 9 - Face-Split Coil Suction and Liquid Line Piping (Typical)  
LEGEND  
TXV — Thermostatic Expansion Valve  
NOTE: The 8 o’clock position is shown above.  
FIRST ON/LAST OFF = B  
VERTICAL INSTALLATION  
C10689  
Fig. 11 - TXV Sensing Bulb Location  
FIRST ON/LAST OFF = A  
HORIZONTAL INSTALLATION  
C10688  
Fig. 10 - Typical Evaporator Coil Connections (524J)  
12  
Table 2 – Factory-Installed Nozzle and Distributor Data  
FEEDER TUBES  
PER DISTRIBUTOR  
Qty...Size (in.)  
COIL TYPE  
STD  
TXV  
Qty...Part No.  
DISTRIBUTOR  
Qty...Part No.  
NOZZLE  
Qty...Part No.  
]
UNIT  
3
3
524J*25A  
524J*28A  
524J*30A  
524J*25H  
4 Row  
4 Row  
4 Row  
4 Row  
2 . . . B B IZ E --- 8 --- G A  
2 . . . B B IZ E --- 1 5 --- G A  
2 . . . B B IZ E --- 1 5 --- G A  
2 . . . B B IZ E --- 1 2 . 5 --- G A  
2...D196---18--- /  
2...1126  
18... /  
2...G6  
2...C15  
2...C17  
2...G8  
16  
16  
16  
16  
3
20... /  
3
2...1126  
3
24... /  
3
2...113---12--- /  
2 --- 1 2 . . . /  
16  
16  
]
1
Feeder tube size is  
/
in. (6.35 mm).  
4
NOTE: Hot gas bypass applications require field---supplied auxiliary side connector.  
Table 3 – Fitting Requirements  
]
UNIT  
ACCESS HOLE NO.  
CONNECTION TYPE  
CIRCUIT  
FITTINGS REQUIRED (in.)  
1
1 / Street Elbow  
8
1
5
1 / Nipple, 7 /  
8
L
1
Suction  
Lower  
Lower  
Upper  
8
1
1 / Long Radius Elbow  
8
5
/
/
/
/
/
/
Street Elbow  
1
8
8
8
8
8
8
5
5
5
5
5
Nipple, 6 /  
L
2
3
Liquid  
Liquid  
2
Long Radius Elbow  
Street Elbow  
1
524J*25A  
Nipple, 9 /  
L
2
Long Radius Elbow  
5
1
1 / Nipple, 5 /  
8
L
8
1
1 / Long Radius Elbow  
8
4
Suction  
Upper  
1
1 / Nipple, 11 L  
8
1
1 / Long Radius Elbow  
8
1
1 / Nipple, 3 L  
8
3
5
Suction  
Suction  
Lower  
Lower  
11/ Long Radius Elbow  
8
5
5
5
5
5
5
5
5
7
/
/
/
/
/
/
/
/
Nipple, 2 / L  
8
8
8
8
8
8
8
8
8
45_ Elbow  
5
Nipple, 1 / L  
8
Long Radius Elbow  
7
Nipple, 2 / L  
8
524J*25H  
45_ Elbow  
6
7
Liquid  
Upper  
Upper  
1
Nipple, 4 / L  
4
Long Radius Elbow  
1
1 / Nipple, 5 L  
8
1
1 / 45_ Elbow  
8
Suction  
1
3
1 / Nipple, 8 /  
8
L
4
1
1 / Long Radius Elbow  
8
3
1 / Street Elbow  
8
3
1 / Nipple, 11 L  
8
1
2
3
Suction  
Liquid  
Liquid  
Lower  
Lower  
Upper  
3
1 / Long Radius Elbow  
8
5
/
/
/
/
/
/
Street Elbow  
1
8
8
8
8
8
8
5
5
5
5
5
Nipple, 1 /  
L
2
Long Radius Elbow  
Street Elbow  
1
524J*28A  
Nipple, 19 /  
L
2
Long Radius Elbow  
3
3
1 / Nipple, 4 /  
8
L
16  
3
1 / Long Radius Elbow  
8
4
Suction  
Upper  
3
1
1 / Nipple, 23 /  
8
L
4
3
1 / Long Radius Elbow  
8
]
See Fig. 8 for access hole location by number.  
† Fittings are listed in order from header or tee stub connection out to access hole in corner support post.  
13  
Table 3 — Fitting Requirement (cont)  
]
UNIT  
ACCESS HOLE NO.  
CONNECTION TYPE  
CIRCUIT  
FITTINGS REQUIRED (in.)  
3
1 / Street Elbow  
8
3
1 / Nipple, 3 L  
8
1
Suction  
Lower  
3
1 / Long Radius Elbow  
8
5
/
/
/
/
/
/
Street Elbow  
3
8
8
8
8
8
8
5
5
5
5
5
Nipple, 7 /  
L
2
3
Liquid  
Liquid  
Lower  
Upper  
4
Long Radius Elbow  
Street Elbow  
1
524J*30A  
Nipple, 18 /  
L
2
Long Radius Elbow  
3
3
1 / Nipple, 4 /  
8
L
16  
3
1 / Long Radius Elbow  
8
4
Suction  
Upper  
3
1
1 / Nipple, 19 /  
8
L
4
3
1 / Long Radius Elbow  
8
]
See Fig. 8 for access hole location by number.  
† Fittings are listed in order from header or tee stub connection out to access hole in corner support post.  
Condensate Drain - Install a trapped condensate drain line  
to unit connection as shown in Fig. 12. The unit drain  
connection is a PVC stub. See Fig. 13. Some areas may  
require an adapter to connect to either galvanized steel or  
copper pipe. For these applications, install a field-supplied  
threaded PVC adapter.  
Install clean-out plugs in trap. Pitch drain line downward  
to an open floor drain or sump. Provide service clearance  
around drain line to permit removal of unit panels.  
Observe all local sanitary codes.  
3” MIN.  
[76]  
C10692  
Fig. 13 - Drain Pan Slope Adjustment  
As shipped, the unit’s condensate drain pan is NOT sloped  
towards the drain connection. The pan slope must be  
changed to pitch towards the side of the unit with the  
drain connection. See Fig. 13. Loosen the 2 screws next to  
the drain outlet at both ends of the unit, push drain pan  
down in the slots near the drain connection, and up in the  
slots on the opposite end. Re-tighten screws. The pan  
should have a pitch of at least 1/4 -in. over its length  
toward the drain connection.  
NOTE: Dimensions in [ ] are in millimeters  
C10691  
Fig. 12 - Condensate Drains  
NOTE: A trap must be installed in the condensate drain  
line to ensure that the static pressure of fans is balanced with  
the water column in the drain line and that condensate can  
drain completely from pan. Without a trap, air can be drawn  
up drain line until water level in condensate pan becomes  
equal to static pressure created by fans, preventing complete  
drainage. Conditions will worsen as filters become dirty.  
14  
Fan Motors and Drives - Motor and drive packages are  
factory installed in all units. The motor and drive  
packages consist of the following items:  
Install disconnect switch and power wiring in accordance  
with all applicable local codes. See Fig. 14-16 and the  
unit label diagram. Connect power wiring with /4 - i n .  
1
ring terminal.  
1 — fan motor  
1 — adjustable motor pulley  
1 — fan pulley  
FAN SCROLL  
FAN  
CONTACTOR  
BOX  
MOTOR  
WIRE  
AND DRIVE  
2 — matched fan belts (524J*25A-30A units)  
ACCESS  
For instructions on changing fan rotation, changing drive  
speeds and adjusting drives, see Pulley and Drive  
Adjustment in the Service section.  
FAN DRIVE  
PULLEY  
CONDENSATE  
DRAIN  
CONNECTION  
(HORIZONTAL)  
COIL  
Power Supply and Wiring - Check the unit data plate to  
ensure that available power supply matches electrical  
characteristics of the unit. Provide a disconnect switch  
with an integrated lock-out feature of size required to  
provide adequate fan motor starting current. See Tables  
4-6 for unit electrical data.  
FILTER  
TXV BULB  
ACCESS  
ELEMENTS  
REFRIGERANT  
PIPING ACCESS  
FILTER  
RETAINER  
CLIP  
CONDENSATE  
DRAIN  
CONNNECTION  
(VERTICAL)  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
LEGEND  
Failure to follow this warning could result in personal  
injury or death.  
TXV — Thermostatic Expansion Valve  
C10693  
Do not use gas piping as an electrical ground. Unit  
cabinet must have an uninterrupted, unbroken electrical  
ground to minimize the possibility of personal injury 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 electrical ground  
when installed in accordance with NEC (National  
Electrical Code); ANSI/NFPA 70, latest edition (in  
Canada, Canadian Electrical Code CSA [Canadian  
Standards Association] C22.1), and local electrical  
codes.  
Fig. 15 - Wiring and Service Access  
(Side Panel Removed)  
Fan motors are factory-installed on all units. Indoor-fan  
contactors are located in the fan contactor box behind the  
side access panel (see Fig. 15 and 16). Wire the thermostat  
to the 24-v control circuit terminal block located in the  
side of the fan contactor control box, according to Fig. 17  
or the unit label diagram. If the air handler is part of a  
split system, complete the wiring from the condensing  
unit to the thermostat shown in Fig. 17.  
!
WARNING  
FIRE HAZARD  
Failure to follow this warning could result in intermittent  
operation or performance satisfaction.  
Do not connect aluminum wire between disconnect  
switch and fan coil unit. Use only copper wire.  
(See Fig. 14)  
W
FAN  
CONTACTOR  
24V  
TERMINAL  
BLOCK  
ELECTRIC  
DISCONNECT  
SWITCH  
POWER  
WIRING  
COPPER  
KNOCKOUT  
WIRE ONLY  
C10694  
Fig. 16 - Fan Contactor Box and Terminal Block  
(Cover Removed) (Typical)  
ALUMINUM  
WIRE  
A93033  
Fig. 14 - Disconnect Switch and Unit  
15  
Table 4 – Electrical Data, Standard Motors  
FAN MOTOR  
VOLTAGE  
POWER SUPPLY  
{
UNIT  
V --- P H --- H z  
Minimum  
LIMITS  
Hp (kW)  
FLA  
MOCP  
Circuit Amps  
18.4/17.0  
8.5  
208/230---3---60  
4 6 0 --- 3 --- 6 0  
187---253  
414---506  
518---632  
187---253  
414---506  
518---632  
187---253  
414---506  
518---632  
5.0 (3.73)  
5.0 (3.73)  
5.0 (3.73)  
7.5 (5.59)  
7.5 (5.59)  
7.5 (5.59)  
10.0 (7.46)  
10.0 (7.46)  
10.0 (7.46)  
14.7/13.6  
6.8  
30/25  
15  
524J*25A  
524J*25H  
5 7 5 --- 3 --- 6 0  
5.1  
6.4  
15  
208/230---3---60  
4 6 0 --- 3 --- 6 0  
21.4/19.4  
9.7  
26.9/24.3  
12.1  
45/40  
20  
524J*28A  
524J*30A  
5 7 5 --- 3 --- 6 0  
7.8  
9.8  
15  
208/230---3---60  
4 6 0 --- 3 --- 6 0  
28.0/25.2  
12.6  
35.0/31.5  
15.8  
60/50  
25  
5 7 5 --- 3 --- 6 0  
10.3  
12.9  
20  
See Legend and Notes below.  
Table 5 – Electrical Data, Alternate Motors  
FAN MOTOR  
VOLTAGE  
POWER SUPPLY  
UNIT  
V --- P H --- H z *  
Minimum  
LIMITS  
Hp (kW)  
FLA  
MOCP  
Circuit Amps  
208/230---3---60  
4 6 0 --- 3 --- 6 0  
187---253  
414---506  
518---632  
187---253  
414---506  
518---632  
7.5 (5.59)  
7.5 (5.59)  
7.5 (5.59)  
10.0 (7.46)  
10.0 (7.46)  
10.0 (7.46)  
21.4/19.4  
9.7  
26.9/24.3  
12.1  
45/40  
20  
524J*25A  
524J*25H  
5 7 5 --- 3 --- 6 0  
7.8  
9.8  
15  
208/230---3---60  
4 6 0 --- 3 --- 6 0  
28.0/25.2  
12.6  
35.0/31.5  
15.8  
60/50  
25  
524J*28A  
524J*30A  
5 7 5 --- 3 --- 6 0  
10.3  
12.9  
20  
See Legend and Notes below.  
Legend and Notes for Tables 4 and 5  
LEGEND:  
Example: Supply voltage is 230-3-60  
F L A  
--- Fu ll L o a d A m p s  
max voltage deviation from average voltage  
average voltage  
MOCP --- Maximum Overcurrent Protection  
% Voltage Imbalance = 100 x  
{
Motors are designed for satisfactory operation within 10% of  
normal voltage shown. Voltages should not exceed the limits  
shown in the Voltage Limits column.  
AB = 393 v  
BC = 403 v  
AC = 396 v  
NOTES:  
1. Minimum circuit amps (MCA) and MOCP values are calcu-  
lated in accordance with The NEC. Article 440.  
(393 + 403 + 396)  
1192  
3
Average Voltage =  
=
=
2. Motor FLA values are established in accordance with Under-  
writers’ Laboratories (UL). Standard 1995.  
3
397  
3. Unbalanced 3-Phase Supply Voltage  
Never operate a motor where a phase imbalance in supply  
voltage is greater than 2%. Use the formula in the example  
(see column to the right) to determine the percentage of volt-  
age imbalance.  
Determine maximum deviation from average voltage.  
(AB) 397 – 393 = 4 v  
(BC) 403 – 397 = 6 v  
(AC) 397 – 396 = 1 v  
4. Installation with Accessory Electric Heaters  
Size the Field Power Wiring between the heater TB1 and the  
524J indoor fan motor per NEC Article 430---28 (1) or (2)  
(depends on length of conduit between heater enclosure and  
524J power entry location). Install wires in field---installed  
conduit.  
Maximum deviation is 4 v.  
Determine percent of voltage imbalance.  
6
% Voltage Imbalance  
= 100 x  
= 1.5%  
397  
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.  
16  
C10695  
Fig. 17 - Unit Wiring  
Table 6 – Fan Contactor Coil Data  
installation. Using the existing screws, install the duct  
flanges on the unit’s fan deck. Each fan discharge requires  
2 flanges; each flange must be bent in the middle to  
conform to the discharge opening. See Fig. 19. After  
flanges are installed, connect them to the supply duct  
using a canvas connection to prevent vibration. It is  
important that this connection be properly fabricated to  
prevent high air friction losses and air noise.  
UNIT  
524J*  
VOLTAGE  
(vac)  
MAXIMUM  
HOLDING VA  
25A, 25H, 28A, 30A  
24  
10  
Connecting Ductwork - Refer to the System Design  
Manual for the recommended design and layout of  
ductwork. Fig. 18 shows recommended duct connection to  
units with 2 fans.  
RETURN CONNECTIONS — When using return-air  
ductwork, route return-air duct to the unit’s return air inlet  
near the filter rack, using a canvas connection to prevent  
transmission of unit vibration. If the duct blocks off the  
unit’s access panel, provide a slip joint in the ductwork to  
permit removal for servicing.  
!
CAUTION  
UNIT OPERATION HAZARD  
Failure to follow this caution could cause equipment  
damage.  
Do not operate unit without ductwork or discharge  
plenum unless fan speed has been adjusted for  
external static pressure of zero in. wg. Failure to do so  
may result in motor overload.  
OUTDOOR-AIR INLET CONNECTIONS — Connect  
outdoor-air inlet to field-installed accessory economizer.  
Refer to Economizer Installation Instructions.  
Return-Air Filters - Type and size of filters are shown  
in Tables 1A – 1D and are factory-supplied and  
factory-installed. In all units with 2 fans, a filter  
replacement tool (hook) is shipped inside the unit for field  
use when replacing filters. See the Service section for  
instructions on filter element replacement.  
DISCHARGE CONNECTIONS — Duct flanges are  
factory-supplied; they are shipped inside the unit attached  
to the hairpin end of the coil tube sheet for field  
17  
C10696  
Fig. 18 - Typical Fan Discharge Connections for Multiple Fan Units  
C10697  
Fig. 19 - Duct Flange Installation  
18  
2. To increase superheat, turn the stem clockwise. To de-  
crease the superheat, turn the stem counterclockwise.  
Do not turn the stem more than one full turn.  
3. Wait until suction pressure and superheat stabilize.  
This may take more than 30 minutes.  
START--UP  
Before starting unit, check the following and correct as  
necessary:  
S Is unit solidly supported?  
4. Continue adjustment until superheat reaches 10_F to  
15_F (5.5_C to 8.3_C).  
5. Replace the seal cap; tighten.  
S Is fan adjusted for speed and pulley alignment?  
S Are pulleys, motor, and bearings securely mounted?  
S Are there any loose parts that will rattle or vibrate?  
S Is condensate drain pan pitched for correct drainage?  
INSTALLER / INSTALLATEUR  
TXV superheat must be checked at initial  
unit start-up and adjusted if necessary.  
Superheat must be 10 - 15 deg F.  
S Are coil baffle plates tight against coil to prevent air  
bypass?  
La surchauffe TXV doit être vérifiée au  
moment de la mise en route initiale et  
ajustée si nécessaire. La surchauffe doit  
S Are all panels securely fastened?  
S Are all electrical connections correct and tight?  
S Is TXV bulb located on suction tube per Fig. 20?  
être comprise entre 10 et 15 degrés F.  
40RU500073 2.0  
S Is the capillary tube to the bulb free of kinks and not  
subject to pinching?  
C10828  
Fig. 21 - Label, TXV Adjustment  
S Is the bulb well secured to the suction tube with strap?  
SERVICE  
Also refer to condensing unit or outdoor heat pump section  
instructions before starting a split system. A split system  
start-up checklist is provided at the end of these instructions.  
Inspection and maintenance should be performed at  
regular intervals and should include the following:  
40RU500072 2.0  
IMPORTANT! / IMPORTANT  
EQUALIZER LINE  
S Complete cleaning of cabinet, fan wheel, cooling coil,  
condensate pan and drain, heating coils, and return-air  
grille (if present).  
TXV  
CONDUITE D'ÉQUILIBRAGE  
SENSING  
BULB  
UPPER SPLIT  
BLOC SUPÉRIEUR  
SIGHT GLASS  
HUBLOT  
CAPTEUR TXV  
S Inspection of panels and sealing of unit against air  
AIR FLOW  
CIRCULATION  
D'AIR  
leakage.  
TXV  
15 DIAMS MIN  
10 DIAMS  
10 x DIA. MIN  
15 x DIA. MIN  
SOLENOID  
VALVE  
S Adjustment of fan motor, belt, bearings, and wheels.  
S Cleaning or replacement of filters.  
8 DIAMS MIN  
8
x
DIA. MIN  
VANNE  
SOLÉNOÏDE  
LOWER  
SPLIT  
FILTER  
DRIER  
FILTRE  
BLOC  
TXV SENSING  
BULB  
CAPTEUR TXV  
INFÉRIEUR  
DESSICCATEUR  
S Testing for cooling/heating system leaks.  
S Checking of all electrical connections.  
TXV  
AIR FLOW  
CIRCULATION  
D'AIR  
EQUALIZER LINE  
15 DIAMS MIN  
15 x DIA. MIN 10 x DIA. MIN  
10 DIAMS  
CONDUITE D'ÉQUILIBRAGE  
8
8
DIAMS MIN  
x
DIA. MIN  
INDOOR COIL  
ÉCHANGEUR INTÉRIEUR  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
The sensor bulb capillary tubes must be routed from the TXVs inside the unit through one of the piping  
access holes. Clamp the TXV sensor bulb on a vertical portion of the suction line, outside the unit.  
See Fig. 7 in the installation, start-up and service instruction. Super heat must be adjusted in field.  
Les tubes capillaires du capteur doivent être acheminé à partir du détendeur thermostatique situé à l'intérieur  
de l'appareil au travers de l'un des trous d'accès de conduites. Attacher le capteur sur une portion verticale  
de la conduite de succion, à l'extérieur de l'appareil. Voir la Figure 7 dans le manuel d'installation, de mise  
en marche, et d'entretien. La surchauffe doit être ajustée sur place.  
Failure to follow this warning could result in personal  
injury or death.  
Before performing service or maintenance operations  
on unit, always turn off main power switch to unit and  
install lockout tag. Unit may have more than one  
power switch.  
C10827  
Fig. 20 - Label, TXV Bulb Location  
Adjusting TXV for Superheat —  
Most unit service can be performed by removing one or  
both of the unit’s side panels. Coil cleaning or removal or  
insulation cleaning may require removal of a rear, top, or  
bottom panel, depending on the unit’s orientation. When  
service is completed, replace unit panels.  
The unit-mounted thermostatic expansion valve(s) is/are  
factory set to provided superheat at the bulb location in  
10_F to 15_F (5.5_C to 8.3_C) range. Actual system load  
conditions may require adjustment of the factory setting.  
To adjust the TXV superheat setting:  
Panels - Panels are fastened to unit frame with sheet  
metal screws. Fan and coil compartment must be sealed  
tightly after service to prevent air from bypassing the  
cooling coil.  
1. Remove the seal cap from the bottom of the TXV  
body.  
19  
Fan Motor Lubrication - Fan motor supplied with unit is  
permanently lubricated and requires no further  
lubrication.  
Centering Fan Wheel - If fan and fan shaft assembly are  
                                                                                                                                             
not properly centered, blades may scrape against the  
blower side scroll plate or may create an objectionable  
whistling noise. It may be necessary to adjust individual  
fan wheels or move entire fan shaft. See the following two  
sections.  
Fan Shaft Bearings - Size 25-30 units have pillow-block  
bearings (Fig. 22) that must be lubricated with suitable  
bearing grease approximately every 3 months. See Table 7  
for suitable lubricants.  
Fan Shaft Position Adjustment - Loosen setscrew or  
locking collar of each fan shaft bearing. Slide shaft into  
correct position and replace locking collar (Fig. 23). To  
replace locking collar, push collar up against inner face of  
bearing. Turn collar in direction of fan rotation until tight,  
and tighten setscrew. Tightening locking collar in  
direction of fan rotation results in further tightening of  
collar should setscrew work itself loose.  
Table 7 – Lubricant Data  
MANUFACTURER  
Mobil  
LUBRICANT  
Mobilplex EP No. 2  
Prestige 42  
Sunoco  
Texaco  
Multifak 2  
Texaco  
R e g a l A F B --- 2 *  
*Preferred lubricant, contains rust and oxidation inhibitors.  
C10699  
Fig. 23 - Fan Shaft Bearing  
C10698  
Fig. 22 - Fan Shaft, Bearings, and Fan Wheel (Typical)  
C10700  
Fig. 24 - Fan Motor Mounting  
20  
Individual Fan Wheel Adjustment - Loosen the 2  
locking bolts holding fan wheel hub to shaft. See Fig. 22.  
Position fan wheel in center of the fan housing and tighten  
locking bolts. Clearance between wheel and housing  
should be the same on both sides.  
Fan Belts - Motor mounting plate and motor support  
angles are slotted to permit both vertical and horizontal  
adjustment. Adjust belt(s) for correct deflection by  
loosening motor plate mounting bolts, moving motor/plate  
assembly forward or back, and re-tightening bolts. Press  
down on belt with one finger midway between fan and  
motor pulleys to check deflection. The correct deflection  
is 1/8 -in. (3.2 mm). See Fig. 24.  
If complete belt replacement is required during servicing,  
loosen the motor plate mounting bolts (Fig. 24), move  
motor/plate assembly towards fan pulley, and pull belt(s)  
off pulleys. Reverse the procedure with new bolts and  
readjust deflection.  
C10702  
Fig. 26 - Fan Pulley Adjustments  
Fan Rotation - Correct fan rotation with respect to fan  
outlet is shown in Fig. 25.  
Pulley and Drive Adjustment - To obtain desired fan  
speed, refer to the fan motor and drive data in Tables  
8A-11D and adjust fan motor pulley as follows:  
1. Remove belt from fan motor pulley after loosening  
motor from motor base.  
2. Loosen setscrew in moveable flange of pulley. Screw  
moveable flange toward fixed flange to increase the  
fan speed and away from fixed flange to reduce  
speed. Before tightening setscrew, make certain that  
setscrew is over nearest flat surface of pulley hub  
(Fig. 26).  
C10701  
Fig. 25 - Fan Rotation  
!
CAUTION  
To reverse the direction of rotation of a 3-phase fan  
motor, reverse any 2 of the power leads. Refer to the  
connection diagram on the inside of motor terminal box  
cover for proper reversing procedure of single-phase  
motor.  
UNIT OPERATION HAZARD  
Failure to follow this caution could cause equipment  
damage.  
Increasing fan speed produces a greater load on motor.  
Do not exceed rated capacity of motor.  
Fan Pulley Alignment - Align as follows:  
1. Loosen setscrews on pulleys.  
2. Align pulleys visually and tighten setscrews on fan  
pulley to lock it in place.  
Condensate Drains - Keep condensate drains free of dirt  
and foreign matter.  
3. Use the methods shown in Fig. 26 to check proper  
pulley alignment.  
4. If pulleys are not in correct alignment, loosen the mo-  
tor holddown bolts and slide the motor axially until  
the pulleys are aligned.  
Return-Air Filters - Refer to Replacing Filters section  
for filter accessibility and removal. Replace with clean  
filters of the sizes listed in Tables 1A-1F.  
S After draining as much water as possible from coils, add  
sufficient antifreeze to prevent residual water in the coil  
from freezing.  
5. Tighten motor holddown bolts.  
S Add a sufficient quantity of non-corrosive antifreeze to  
the entire system to prevent all water within the system  
from freezing.  
21  
Coil Removal - Remove unit panels and corner posts as  
required. Disconnect coil connections and remove fastening  
screws. Remove coil through end or side sections of unit.  
Cleaning Cooling Coil - Remove return-air filters.  
Remove any heavy dirt that may have accumulated on  
underside of coil. Coil can be cleaned more easily with a  
stiff brush, vacuum cleaner, or compressed air when coil  
is dry. If coil is wet or if water is to be used for cleaning,  
guard against splashing water on electrical components or  
damaging surrounding area. Clean coil baffles as  
applicable and check for tight fit to be sure air does not  
bypass coil.  
FILTER  
RETAINER  
CLIP  
SLIDE  
Cleaning Insulation  
-
The insulation contains an  
immobilized antimicrobial agent that helps prevent the  
growth of bacteria and fungi. Clean the inner surface of  
the insulation according to the separate maintenance  
instructions shipped with the unit.  
Replacing Filters - Filters can be removed and installed  
from either side of the unit. Install new filters in units that  
have one fan as follows:  
C10703  
Fig. 27 - Remove Filter Retainer Clip  
1. Remove the side access panel (retain screws).  
2. Remove the filter retainer clip (see Fig. 27).  
3. Remove old filters by lifting and tilting them out of  
the filter track. See Fig. 15 and 28. Use the factory-  
supplied filter hook to slide filters within reach for re-  
moval. The filter hook is shipped inside the unit in  
the filter track  
4. Reverse the procedure to install new filters.  
!
CAUTION  
UNIT OPERATION HAZARD  
Failure to follow this caution could cause equipment  
damage.  
Do not operate unit without air filters.  
C10704  
Fig. 28 - Filter Removal/Replacement  
22  
Table 8A -- Fan Motor Data, Standard Motor — English  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
208/230---3---60 and 460---3---60  
Speed (rpm)  
Hp  
1745  
5.0  
1745  
7.5  
1745  
10.0  
Frame (NEMA)  
Shaft Dia (in.)  
5 7 5 --- 3 --- 6 0  
S184T  
1
S213T  
3
S215T  
3
1 /  
1 /  
1 /  
8
8
8
Speed (rpm)  
Hp  
1745  
5.0  
1755  
7.5  
1755  
10.0  
Frame (NEMA)  
Shaft Dia (in.)  
184T  
1
S213T  
3
D215T  
3
1 /  
1 /  
1 /  
8
8
8
LEGEND  
NEMA — National Electrical Manufacturers Association  
Table 8B -- Fan Motor Data, Alternate Motor — English  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
208/230---3---60 and 460---3---60  
Speed (rpm)  
Hp  
1745  
7.5  
1745  
10.0  
1745  
10.0  
Frame (NEMA)  
Shaft Dia (in.)  
5 7 5 --- 3 --- 6 0  
S213T  
3
S215T  
3
S215T  
3
1 /  
1 /  
1 /  
8
8
8
Speed (rpm)  
Hp  
1755  
7.5  
1750  
10.0  
1750  
10.0  
Frame (NEMA)  
Shaft Dia (in.)  
S213T  
3
D215T  
3
D215T  
3
1 /  
1 /  
1 /  
8
8
8
LEGEND  
NEMA — National Electrical Manufacturers Association  
23  
Table 8C -- Fan Motor Data, Standard Motor — SI  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
208/230---3---60 and 460---3---60  
Speed (r/s)  
29.08  
3.73  
29.08  
5.60  
29.08  
7.46  
Shaft kW  
Frame (NEMA)  
Shaft Dia (mm)  
5 7 5 --- 3 --- 6 0  
S184T  
28.6  
S213T  
34.9  
S215T  
34.9  
Speed (r/s)  
29.08  
3.73  
29.25  
5.60  
29.25  
7.46  
Shaft kW  
Frame (NEMA)  
Shaft Dia (mm)  
184T  
28.6  
S213T  
34.9  
S215T  
34.9  
LEGEND  
NEMA — National Electrical Manufacturers Association  
Table 8D -- Fan Motor Data, Alternate Motor — SI  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
208/230---3---60 and 460---3---60  
Speed (r/s)  
29.08  
5.60  
29.17  
7.46  
29.17  
7.46  
Shaft kW  
Frame (NEMA)  
Shaft Dia (mm)  
5 7 5 --- 3 --- 6 0  
S213T  
34.9  
S215T  
34.9  
S215T  
34.9  
Speed (r/s)  
29.25  
5.60  
29.17  
7.46  
29.17  
7.46  
Shaft kW  
Frame (NEMA)  
Shaft Dia (mm)  
S213T  
34.9  
D215T  
34.9  
D215T  
34.9  
LEGEND  
NEMA — National Electrical Manufacturers Association  
24  
Table 9A -- Standard Drive Data, 60 Hz — English  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
MOTOR DRIVE  
Motor Pulley Pitch Diameter (in.)  
3.7---4.7  
3.0  
4.3---5.3  
3.0  
4.3---5.3  
3.0  
Pulley Factory Setting  
Full Turns Open  
FAN DRIVE  
Pulley Pitch Dia (in.)  
Pulley Bore (in.)  
Belt No. — Section  
9.4  
7
11.0  
15  
11.0  
15  
1 /  
1
/
1
/
16  
16  
16  
2—B  
41.8  
2—B†  
2—B†  
(2) 42.8  
(2) 43.8  
(2) 42.8  
(2) 43.8  
Belt Pitch (in.)  
FAN SPEEDS (rpm)  
Factory Setting  
Range  
771  
679---863  
1200  
752  
682---841  
1100  
752  
674---831  
1100  
Max Allowable Speed (rpm)  
1
Change per  
/
2
Turn of  
Moveable Motor Pulley  
Flange  
15.3  
13.1  
13.1  
MAX FULL TURNS FROM  
CLOSED POSITION  
6
6
6
SHAFTS CENTER DISTANCE (in.)  
9.12---10.99  
6.67---9.43  
6.67---9.43  
Four belts shipped with unit. Use correct set of 2 belts sized according to the pulley setting.  
Table 9B -- Medium--Static Drive Data, 60 Hz — English  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
MOTOR DRIVE  
Motor Pulley Pitch Diameter (in.)  
4.3---5.3  
3.0  
4.3---5.3  
3.0  
4.3---5.3  
3.0  
Pulley Factory Setting  
Full Turns Open  
FAN DRIVE  
Pulley Pitch Dia (in.)  
Pulley Bore (in.)  
Belt No. — Section  
9.4  
7
9.4  
15  
9.4  
15  
1 /  
1
/
1
/
16  
16  
16  
1—B  
41.8  
2—B†  
2—B†  
(2) 38.8  
(2) 39.8  
(2) 38.8  
(2) 39.8  
Belt Pitch (in.)  
FAN SPEEDS (rpm)  
Factory Setting  
Range  
881  
798---984  
1200  
881  
798---984  
1100  
881  
798---984  
1100  
Max Allowable Speed (rpm)  
1
Change per  
/
2
Turn of  
Moveable Motor Pulley  
Flange  
15.3  
15.3  
15.3  
MAX FULL TURNS FROM  
CLOSED POSITION  
6
6
6
SHAFTS CENTER DISTANCE (in.)  
9.16---10.99  
6.67---9.43  
6.67---9.43  
Four belts shipped with unit. Use correct set of 2 belts sized according to the pulley setting.  
25  
Table 9C -- High--Static Drive Data, 60 Hz — English  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
MOTOR DRIVE  
Motor Pulley Pitch Diameter (in.)  
4.3---5.3  
3.0  
4.3---5.3  
3.0  
4.3---5.3  
3.0  
Pulley Factory Setting  
Full Turns Open  
FAN DRIVE  
Pulley Pitch Dia (in.)  
Pulley Bore (in.)  
Belt No. — Section  
Belt Pitch (in.)  
FAN SPEEDS (rpm)  
Factory Setting  
Range  
7.4  
7
8.6  
15  
8.6  
15  
1 /  
1
/
1
/
16  
16  
16  
2—B  
36.8  
2—B  
378  
2—B  
37.8  
1118  
1014---1200Æ  
1200  
1024  
873---1075  
1100  
1024  
873---1075  
1100  
Max Allowable Speed (rpm)  
1
Change per  
/
2
Turn of  
Moveable Motor Pulley  
Flange  
19.4  
16.7  
16.7  
MAX FULL TURNS FROM  
CLOSED POSITION  
6
6
6
SHAFTS CENTER DISTANCE (in.)  
8.16---10.02  
6.67---9.43  
6.67---9.43  
It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 1200 rpm.  
Table 9D-- Standard Drive Data, 60 Hz — SI  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
MOTOR DRIVE  
Motor Pulley Pitch Diameter (mm)  
94.0---119.4  
3.0  
109.2---134.6  
3.0  
109.2---134.6  
3.0  
Pulley Factory Setting  
Full Turns Open  
FAN DRIVE  
Pulley Pitch Dia (mm)  
Pulley Bore (mm)  
Belt No. — Section  
239  
36.5  
2—B  
279  
49.2  
279  
49.2  
2—B†  
2—B†  
(2) 1987  
(2) 1113  
(2) 1987  
(2) 1113  
Belt Pitch (mm)  
1062  
FAN SPEEDS (r/s)  
Factory Setting  
Range  
12.9  
11.3---14.4  
20.0  
12.5  
11.4---14.0  
18.3  
12.5  
11.2---13.9  
18.3  
Max Allowable Speed (r/s)  
1
Change per / Turn of  
2
Moveable Motor Pulley  
Flange  
0.255  
0.218  
0.218  
MAX FULL TURNS FROM  
CLOSED POSITION  
6
6
6
SHAFTS CENTER DISTANCE (mm)  
232---279  
169---240  
169---240  
Four belts shipped with unit. Use correct set of 2 belts sized according to the pulley setting.  
26  
Table 9E -- Medium--Static Drive Data, 60 Hz — SI  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
MOTOR DRIVE  
Motor Pulley Pitch Diameter (mm)  
109.2---134.6  
3.0  
109.2---134.6  
3.0  
109.2---134.6  
3.0  
Pulley Factory Setting  
Full Turns Open  
FAN DRIVE  
Pulley Pitch Dia (mm)  
Pulley Bore (mm)  
Belt No. — Section  
239  
36.5  
1—B  
239  
49.2  
239  
49.2  
2—B†  
2—B†  
(2) 986  
(2) 1011  
(2) 986  
(2) 1011  
Belt Pitch (mm)  
1062  
FAN SPEEDS (r/s)  
Factory Setting  
Range  
14.7  
13.3---16.4  
20.0  
14.7  
13.3---16.4  
18.3  
14.7  
13.3---16.4  
18.3  
Max Allowable Speed (r/s)  
1
Change per / Turn of  
2
Moveable Motor Pulley  
Flange  
0.255  
0.255  
0.255  
MAX FULL TURNS FROM  
CLOSED POSITION  
6
6
6
SHAFTS CENTER DISTANCE (mm)  
232---279  
169---240  
169---240  
Four belts shipped with unit. Use correct set of 2 belts sized according to the pulley setting.  
Table 9F -- High--Static Drive Data, 60 Hz — SI  
524J*25A  
524J*25H  
UNIT  
524J*28A  
524J*30A  
MOTOR DRIVE  
Motor Pulley Pitch Diameter (mm)  
109.2---134.6  
3.0  
109.2---134.6  
3.0  
109.2---134.6  
3.0  
Pulley Factory Setting  
Full Turns Open  
FAN DRIVE  
Pulley Pitch Dia (mm)  
Pulley Bore (mm)  
Belt No. — Section  
Belt Pitch (mm)  
FAN SPEEDS (r/s)  
Factory Setting  
Range  
188  
36.5  
2—B  
935  
203†  
49.2  
2—B  
935  
203  
49.2  
2—B  
960  
18.6  
16.9---20.0†  
20.0  
17.1  
14.6---17.9  
18.3  
17.1  
14.6---7.9  
18.3  
Max Allowable Speed (r/s)  
1
Change per  
/
2
Turn of  
Moveable Motor Pulley  
Flange  
0.323  
0.278  
0.278  
MAX FULL TURNS FROM  
CLOSED POSITION  
6
6
6
SHAFTS CENTER DISTANCE (mm)  
207---255  
169---240  
169---240  
It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 20 r/s  
27  
Table 10A -- 524J Standard Fan Performance Data —  
0.0--2.4 in. wg External Static Pressure — English  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.0  
0.2  
0.4  
0.6  
0.8  
1.0  
1.2  
UNIT  
Rpm  
532  
608  
686  
764  
843  
456  
521  
587  
653  
720  
829  
521  
596  
673  
751  
829  
Bhp  
1.25  
1.93  
2.83  
3.97  
5.38  
1.29  
1.98  
2.88  
4.03  
5.46  
8.84  
1.99  
3.16  
4.63  
6.51  
8.84  
Rpm  
569  
641  
716  
791  
868  
490  
551  
614  
678  
743  
850  
550  
623  
698  
773  
850  
Bhp  
1.39  
2.09  
3.01  
4.18  
5.62  
1.47  
2.18  
3.11  
4.29  
5.75  
9.19  
2.25  
3.40  
4.90  
6.82  
9.19  
Rpm  
639  
702  
770  
841  
914  
556  
608  
664  
724  
785  
888  
616  
672  
743  
815  
888  
Bhp  
1.69  
2.42  
3.38  
4.59  
6.09  
1.85  
2.61  
3.59  
4.82  
6.33  
9.88  
2.77  
3.89  
5.45  
7.44  
9.88  
Rpm  
711  
763  
823  
888  
957  
621  
664  
714  
768  
825  
924  
676  
720  
785  
853  
924  
Bhp  
2.06  
2.08  
3.77  
5.02  
6.55  
2.25  
3.07  
4.09  
5.37  
6.93  
10.57  
3.23  
4.40  
6.02  
8.06  
10.57  
Rpm  
781  
824  
876  
935  
1000  
678  
720  
763  
812  
865  
958  
731  
767  
826  
890  
958  
Bhp  
2.48  
3.23  
4.21  
5.47  
7.02  
2.64  
3.53  
4.62  
5.95  
7.55  
11.27  
3.72  
4.94  
6.62  
8.71  
11.27  
Rpm  
846  
885  
930  
982  
1042  
729  
770  
812  
856  
904  
991  
782  
814  
867  
927  
991  
Bhp  
2.93  
3.71  
4.70  
5.96  
7.53  
3.06  
3.99  
5.15  
6.54  
8.20  
11.99  
4.20  
5.50  
7.23  
9.38  
11.99  
Rpm  
905  
943  
983  
1030  
1084  
778  
816  
857  
899  
944  
1024  
829  
859  
908  
963  
1024  
Bhp  
3.60  
4.23  
5.24  
6.51  
8.08  
3.60  
4.45  
5.68  
7.14  
8.86  
12.73  
4.70  
6.05  
7.87  
10.07  
12.73  
6,000  
7,000  
524J*25A  
524J*25H  
8,000  
9,000  
10,000  
7,500  
8,750  
10,000  
11,250  
12,500  
15,000  
9,000  
524J*28A  
524J*30A  
10,500  
12,000  
13,500  
15,000  
See Legend and Notes on page 36.  
Table 10A -- 524J Standard Fan Performance Data —  
0.0--2.4 in. wg External Static Pressure — English (cont)  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
1.4  
1.6  
1.8  
2.0  
2.2  
2.4  
UNIT  
Rpm  
Bhp  
3.83  
4.74  
5.79  
7.11  
8.75  
4.41  
4.97  
6.20  
7.73  
9.53  
13.49  
5.20  
6.60  
8.50  
10.78  
13.49  
Rpm  
1005  
1040  
1078  
1120  
1166  
870  
Bhp  
4.27  
5.24  
6.38  
7.72  
9.37  
5.10  
5.59  
6.74  
8.32  
10.19  
14.28  
5.85  
7.14  
9.14  
11.49  
14.28  
Rpm  
1052  
1090  
1130  
1169  
Bhp  
4.72  
5.80  
7.00  
8.37  
Rpm  
1098  
1135  
1173  
Bhp  
5.22  
6.30  
7.60  
Rpm  
Bhp  
Rpm  
Bhp  
6,000  
7,000  
954  
990  
1142  
1176  
5.67  
6.84  
524J*25A  
524J*25H  
8,000  
1028  
1073  
1126  
831  
9,000  
10,000  
7,500  
913  
5.90  
6.42  
7.33  
8.90  
10.84  
950  
980  
1013  
1052  
1093  
6.88  
7.20  
8.00  
9.51  
11.49  
985  
1020  
1050  
1088  
7.70  
8.10  
8.82  
10.16  
8,750  
859  
901  
944  
10,000  
11,250  
12,500  
15,000  
9,000  
900  
939  
976  
524J*28A  
524J*30A  
941  
980  
1017  
1058  
984  
1022  
1090  
899  
1057  
866  
950  
6.65  
7.70  
9.76  
12.21  
989  
1016  
1062  
7.38  
8.31  
10.38  
1029  
1051  
1095  
8.32  
8.99  
11.01  
1077  
1085  
9.74  
9.77  
10,500  
12,000  
13,500  
15,000  
902  
942  
980  
949  
988  
1026  
1073  
1000  
1057  
1036  
1090  
See Legend and Notes on page 36.  
28  
Table 10B -- 524J Standard Fan Performance Data —  
0--600 kPa External Static Pressure — SI  
EXTERNAL STATIC PRESSURE (kPa)  
AIRFLOW  
(L/s)  
0
50  
100  
150  
200  
250  
300  
UNIT  
r/s  
kW  
r/s  
kW  
r/s  
kW  
r/s  
kW  
r/s  
kW  
r/s  
kW  
r/s  
kW  
2830  
3300  
3780  
4250  
4720  
3540  
4130  
4720  
5310  
5900  
4250  
4960  
5660  
6370  
7080  
8.86  
0.94  
1.44  
2.11  
2.96  
4.01  
0.96  
1.47  
2.15  
3.01  
4.07  
1.48  
2.35  
3.45  
4.85  
6.59  
9.48  
1.04  
1.56  
2.25  
3.12  
4.19  
1.09  
1.62  
2.32  
3.20  
4.29  
1.68  
2.53  
3.66  
5.08  
6.85  
10.65  
11.70  
12.84  
14.02  
15.23  
9.27  
1.26  
1.81  
2.52  
3.43  
4.54  
1.38  
1.94  
2.67  
3.59  
4.72  
2.07  
2.90  
4.07  
5.54  
7.36  
11.84  
12.71  
13.71  
14.81  
15.96  
10.34  
11.07  
11.89  
12.80  
13.75  
11.27  
11.99  
13.08  
14.22  
15.40  
1.53  
2.08  
2.81  
3.74  
4.88  
1.68  
2.29  
3.05  
4.00  
5.17  
2.41  
3.28  
4.49  
6.01  
7.88  
13.01  
13.73  
14.60  
15.59  
16.66  
11.30  
11.99  
12.72  
13.53  
14.41  
12.19  
12.78  
13.76  
14.83  
15.97  
1.85  
2.41  
3.14  
4.08  
5.24  
1.97  
2.63  
3.45  
4.43  
5.63  
2.77  
3.68  
4.93  
6.49  
8.40  
14.10  
14.74  
15.49  
16.37  
17.36  
12.15  
12.84  
13.53  
14.27  
15.07  
13.03  
13.56  
14.45  
15.44  
16.52  
2.19  
2.77  
3.51  
4.45  
5.62  
2.28  
2.97  
3.84  
4.88  
6.11  
3.13  
4.10  
5.39  
6.99  
8.94  
15.08  
15.71  
16.39  
17.17  
18.07  
12.97  
13.60  
14.29  
14.99  
15.74  
13.81  
14.32  
15.14  
16.05  
17.06  
2.53  
3.15  
3.91  
4.85  
6.03  
2.68  
3.32  
4.23  
5.33  
6.61  
3.50  
4.51  
5.87  
7.51  
9.49  
10.14  
11.43  
12.74  
14.05  
7.60  
10.69  
11.93  
13.19  
14.47  
8.16  
524J*25A  
524J*25H  
8.68  
9.18  
10.13  
11.07  
12.06  
13.09  
10.27  
11.21  
12.38  
13.58  
14.81  
9.78  
10.23  
11.30  
12.38  
9.17  
524J*28A  
524J*30A  
10.89  
12.00  
8.68  
9.93  
10.38  
11.63  
12.89  
14.17  
11.21  
12.51  
13.82  
See Legend and Notes on page 36.  
Table 10B -- 524J Standard Fan Performance Data —  
0--600 kPa External Static Pressure — SI (cont)  
EXTERNAL STATIC PRESSURE (kPa)  
450 500  
AIRFLOW  
350  
400  
550  
600  
UNIT  
(L/s)  
r/s  
kW  
2.86  
3.53  
4.32  
5.30  
6.52  
3.29  
3.71  
4.62  
5.77  
7.10  
3.88  
4.92  
6.34  
8.04  
10.06  
r/s  
kW  
3.18  
3.91  
4.76  
5.76  
6.99  
3.80  
4.17  
5.02  
6.20  
7.60  
4.36  
5.32  
6.81  
8.57  
10.64  
r/s  
kW  
3.52  
4.32  
5.22  
6.24  
r/s  
kW  
3.89  
4.70  
5.67  
r/s  
kW  
r/s  
kW  
2830  
3300  
15.90  
16.50  
17.13  
17.88  
18.77  
13.85  
14.31  
14.99  
15.68  
16.39  
14.43  
15.04  
15.81  
16.66  
17.61  
16.75  
17.33  
17.97  
18.67  
19.43  
14.50  
15.01  
15.65  
16.34  
17.03  
14.98  
15.71  
16.47  
17.27  
18.16  
17.53  
18.17  
18.83  
19.48  
18.30  
18.92  
19.55  
19.03  
19.60  
4.23  
5.10  
524J*25A  
524J*25H  
3780  
4250  
4720  
3540  
4130  
15.22  
15.74  
16.27  
16.95  
17.64  
15.84  
16.33  
17.10  
17.88  
4.40  
4.79  
5.46  
6.64  
8.08  
4.96  
5.74  
7.28  
9.10  
15.83  
16.33  
16.88  
17.53  
18.22  
16.48  
16.93  
17.69  
5.13  
5.37  
5.97  
7.09  
8.57  
5.50  
6.20  
7.74  
16.42  
17.00  
17.50  
18.09  
5.74  
6.04  
6.57  
7.58  
4720  
5310  
5900  
4250  
4960  
5660  
6370  
7080  
524J*28A  
524J*30A  
17.16  
17.51  
18.26  
6.21  
6.70  
8.21  
17.96  
18.09  
7.26  
7.29  
See Legend and Notes on page 36.  
29  
Table 10C -- 524J High--Capacity Fan Performance Data —  
0.0--2.4 in. wg External Static Pressure — English  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.0  
0.2  
0.4  
0.6  
0.8  
1.0  
1.2  
UNIT  
Rpm  
542  
620  
700  
781  
862  
476  
545  
615  
685  
756  
539  
620  
701  
783  
865  
Bhp  
1.29  
1.99  
2.92  
4.10  
5.56  
1.39  
2.14  
3.12  
4.37  
5.92  
2.18  
3.37  
4.94  
6.95  
9.45  
Rpm  
577  
652  
728  
806  
885  
510  
574  
641  
709  
778  
569  
646  
724  
804  
884  
Bhp  
1042  
2.15  
3.10  
4.30  
5.79  
1.58  
2.35  
3.36  
4.64  
6.22  
2.39  
3.62  
5.22  
7.27  
9.81  
Rpm  
646  
711  
781  
854  
929  
579  
633  
692  
754  
819  
626  
695  
769  
844  
921  
Bhp  
1.72  
2.48  
3.46  
4.71  
6.24  
1.99  
2.81  
3.87  
5.20  
6.83  
2.85  
4.13  
5.80  
7.91  
10.52  
Rpm  
716  
771  
833  
900  
971  
644  
691  
743  
800  
860  
683  
744  
811  
883  
956  
Bhp  
2.09  
2.85  
3.85  
5.13  
6.70  
2.40  
3.29  
4.41  
5.79  
7.47  
3.34  
4.68  
6.40  
8.57  
11.24  
Rpm  
785  
831  
885  
946  
1012  
701  
747  
794  
845  
901  
739  
793  
854  
920  
991  
Bhp  
2.51  
3.28  
4.29  
5.58  
7.18  
2.81  
3.77  
4.96  
6.40  
8.14  
3.83  
5.25  
7.04  
9.26  
11.98  
Rpm  
849  
890  
938  
993  
1054  
752  
797  
843  
891  
942  
791  
842  
897  
958  
1025  
Bhp  
2.95  
3.76  
4.78  
6.08  
7.69  
3.29  
4.25  
5.51  
7.02  
8.83  
4.32  
5.83  
7.69  
9.97  
12.75  
Rpm  
907  
947  
990  
1039  
1096  
804  
842  
888  
935  
983  
837  
888  
940  
996  
1059  
Bhp  
3.40  
4.27  
5.32  
6.62  
8.24  
3.96  
4.76  
6.05  
7.64  
9.52  
4.82  
6.41  
8.36  
10.71  
13.54  
6,000  
7,000  
524J*25A  
524J*25H  
8,000  
9,000  
10,000  
7,500  
8,750  
10,000  
11,250  
12,500  
9,000  
524J*28A  
524J*30A  
10,500  
12,000  
13,500  
15,000  
See Legend and Notes on page 36.  
Table 10C -- 524J High--Capacity Fan Performance Data —  
0.0--2.4 in. wg External Static Pressure — English (cont)  
EXTERNAL STATIC PRESSURE (in. wg)  
1.8 2.0  
AIRFLOW  
(Cfm)  
1.4  
1.6  
2.2  
2.4  
UNIT  
Rpm  
961  
Bhp  
3.86  
4.79  
5.88  
7.21  
8.83  
5.33  
5.36  
6.60  
8.25  
10.20  
5.37  
6.97  
9.02  
11.45  
14.35  
Rpm  
1011  
1050  
1090  
1133  
1180  
897  
Bhp  
4.31  
5.32  
6.47  
7.82  
9.46  
5.91  
6.13  
7.20  
8.86  
10.88  
6.03  
7.55  
9.67  
12.20  
Rpm  
1058  
1097  
1137  
1178  
Bhp  
4.77  
5.85  
7.07  
8.47  
Rpm  
1104  
1142  
1181  
Bhp  
5.24  
6.38  
7.67  
Rpm  
Bhp  
Rpm  
Bhp  
6,000  
7,000  
1147  
1184  
5.71  
6.91  
1000  
1041  
1086  
1138  
874  
524J*25A  
524J*25H  
8,000  
9,000  
10,000  
7,500  
8,750  
940  
6.80  
7.32  
7.89  
9.49  
11.56  
6.89  
8.17  
10.32  
990  
1020  
1045  
1086  
7.50  
8.10  
8.71  
10.17  
886  
930  
982  
10,000  
11,250  
12,500  
9,000  
930  
969  
1007  
1051  
1097  
967  
524J*28A  
524J*30A  
976  
1014  
1061  
923  
1023  
881  
1020  
1045  
1094  
8.25  
8.86  
10.97  
10,500  
12,000  
13,500  
15,000  
930  
970  
1008  
1058  
981  
1021  
1072  
1035  
1093  
See Legend and Notes on page 36.  
30  
Table 10D -- 524J High--Capacity Fan Performance Data —  
0--600 kPa External Static Pressure — SI  
EXTERNAL STATIC PRESSURE (kPa)  
AIRFLOW  
(L/s)  
0
50  
100  
150  
200  
250  
300  
UNIT  
r/s  
kW  
r/s  
kW  
r/s  
kW  
r/s  
kW  
r/s  
kW  
1087  
2.45  
3.20  
4.16  
5.35  
2.10  
2.81  
3.70  
4.77  
6.07  
2.86  
3.92  
5.25  
6.90  
8.93  
r/s  
kW  
r/s  
kW  
2.54  
3.18  
3.96  
4.94  
6.14  
2.95  
3.55  
4.51  
570  
2830  
3330  
3780  
4250  
4720  
3540  
4130  
4720  
5310  
5900  
4250  
4960  
5660  
6370  
7080  
9.03  
0.96  
1.48  
2.17  
3.05  
4.15  
1.04  
1.59  
2.33  
3.26  
4.42  
1.62  
2.51  
3.68  
5.18  
7.05  
9.62  
1.06  
1.60  
2.31  
3.21  
4.32  
1.18  
1.75  
2.51  
3.46  
4.64  
1.78  
2.70  
3.90  
5.42  
7.31  
10.77  
11.85  
13.02  
14.23  
15.48  
9.65  
1.29  
1.85  
2.58  
3.51  
4.66  
1.48  
2.10  
2.88  
3.88  
5.09  
2.12  
3.08  
4.33  
5.90  
7.84  
11.94  
12.84  
13.88  
15.00  
16.18  
10.73  
11.52  
12.39  
13.33  
14.33  
11.39  
12.40  
13.52  
14.71  
15.94  
1.56  
2.12  
2.87  
3.82  
4.99  
1.79  
2.46  
3.29  
4.32  
5.57  
2.49  
3.49  
4.77  
6.39  
8.38  
13.08  
13.85  
14.75  
15.77  
16.87  
11.68  
12.45  
13.24  
14.09  
15.01  
12.32  
13.22  
14.23  
15.34  
16.51  
14.15  
14.84  
15.63  
16.54  
17.56  
12.53  
13.28  
14.05  
14.85  
15.40  
13.18  
14.03  
14.95  
15.97  
17.08  
2.20  
2.80  
3.56  
4.53  
5.73  
2.46  
3.17  
4.11  
5.24  
6.58  
3.22  
4.35  
5.74  
7.44  
9.51  
15.12  
15.78  
16.50  
17.32  
18.26  
13.40  
14.04  
14.80  
15.58  
16.38  
13.95  
14.79  
15.66  
16.61  
17.65  
10.34  
11.67  
13.01  
14.36  
7.94  
10.86  
12.14  
13.44  
14.75  
8.51  
524J*25A  
524J*25H  
9.08  
9.57  
10.55  
11.53  
12.57  
13.65  
10.44  
11.59  
12.81  
14.07  
15.36  
10.24  
11.42  
12.60  
8.99  
10.68  
11.81  
12.96  
9.49  
524J*28A  
524J*30A  
7.10  
3.59  
4.78  
6.23  
7.98  
10.10  
10.33  
11.68  
13.04  
14.42  
10.77  
12.07  
13.40  
14.74  
See Legend and Notes on page 36.  
Table 10D -- 524J High--Capacity Fan Performance Data —  
0--600 kPa External Static Pressure — SI (cont)  
EXTERNAL STATIC PRESSURE (kPa)  
AIRFLOW  
350  
400  
450  
500  
550  
600  
UNIT  
(L/s)  
r/s  
kW  
2.88  
3.57  
4.39  
5.37  
6.58  
3.97  
3.99  
4.92  
6.15  
7.61  
4.00  
5.20  
6.72  
8.54  
10.70  
r/s  
kW  
3.22  
3.96  
4.82  
5.83  
7.05  
4.41  
4.57  
5.37  
6.61  
8.11  
4.49  
5.63  
7.21  
9.10  
r/s  
kW  
3.56  
4.36  
5.27  
6.31  
r/s  
18.39  
19.03  
19.68  
kW  
3.91  
4.75  
5.72  
r/s  
kW  
r/s  
kW  
2830  
3300  
16.01  
16.67  
17.35  
18.11  
18.96  
14.57  
14.76  
15.49  
16.26  
17.04  
14.68  
15.51  
16.35  
17.24  
18.22  
16.85  
17.50  
18.17  
18.88  
19.67  
14.95  
15.51  
16.15  
16.91  
17.68  
15.38  
16.17  
17.01  
17.87  
17.64  
18.28  
18.95  
19.63  
19.12  
19.73  
4.26  
5.15  
524J*25A  
524J*25H  
3780  
4250  
4720  
3540  
4130  
15.67  
16.36  
16.78  
17.51  
18.28  
16.12  
16.80  
17.64  
5.07  
5.46  
5.88  
7.08  
8.62  
5.14  
6.09  
7.69  
16.50  
17.00  
17.42  
18.10  
5.59  
6.04  
6.50  
7.58  
4720  
5310  
5900  
4250  
4960  
5660  
6370  
7080  
524J*28A  
524J*30A  
17.00  
17.41  
18.23  
6.15  
6.61  
8.18  
See Legend and Notes on page 36.  
31  
Legend and Notes for Tables 10A and 10C  
UNIT  
LEGEND  
Bhp --- Brake Horsepower Input to Fan  
ESP --- External Static Pressure  
NOTES:  
FACTORY-SUPPLIED PRESSURE DROP — ENGLISH  
AIRFLOW  
(Cfm)  
PRESSURE DROP  
(in. wg)  
1. Maximum allowable fan speed for size 25 units is 1200 rpm . Maximum  
allowable fan speed for size 28 and 30 units is 1100 rpm.  
6,000  
8,000  
0.12  
0.19  
0.26  
0.15  
0.22  
0.30  
0.19  
0.29  
0.40  
2. Fan performance is based on deductions for wet coil, clean 2-in. filters,  
and unit casing. See table at right for factory-supplied filter pressure drop.  
3. Refer to fan motor and drive tables for additional data.  
524J*25A  
524J*25H  
10,000  
7,500  
10,000  
12,500  
9,000  
524J*28A  
524J*30A  
12,000  
15,000  
Legend and Notes for Tables 10B and 10D  
FACTORY-SUPPLIED PRESSURE DROP — SI  
LEGEND  
ESP --- External Static Pressure  
NOTES:  
AIRFLOW  
(L/s)  
PRESSURE DROP  
(Pa)  
UNIT  
1. Maximum allowable fan speed for size 25 units is 20 r/s. Maximum  
allowable fan speed for size 28 and 30 units is 18.3 r/s.  
2900  
3800  
4700  
3500  
4700  
5900  
4250  
5650  
7050  
32  
47  
64  
36  
55  
76  
47  
71  
98  
2. Fan performance is based on deductions for wet coil, clean 51---mm  
filters, and unit casing. See table at right for factory-supplied filter  
pressure drop.  
524J*25A  
524J*25H  
3. Refer to fan motor and drive tables for additional data.  
524J*28A  
524J*30A  
32  
33  
Catalog No: II524J---07  
2011 Bryant Heating and Cooling Systems. D 7310 W. Morris St. D Indianapolis, IN 46231  
Printed in U.S.A.  
Edition Date: 01/11  
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.  
Replaces: II524J---05  
34  
START--UP CHECKLIST  
(SPLIT SYSTEMS WITH 524J UNITS)  
I. PRELIMINARY INFORMATION  
OUTDOOR: MODEL NO.  
SERIAL NO.  
INDOOR: MODEL NO.  
SERIAL NO.  
ADDITIONAL ACCESSORIES  
II. PRE--START--UP  
OUTDOOR UNIT  
IS THERE ANY SHIPPING DAMAGE? (Y/N)  
IF SO, WHERE:  
WILL THIS DAMAGE PREVENT UNIT START-UP? (Y/N)  
CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT? (Y/N)  
HAS THE GROUND WIRE BEEN CONNECTED? (Y/N)  
HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (Y/N)  
ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (Y/N)  
HAVE COMPRESSOR HOLDDOWN BOLTS BEEN LOOSENED? (Y/N)  
CONTROLS  
ARE THERMOSTAT(S) & INDOOR FAN CONTROL WIRING CONNECTIONS MADE & CHECKED? (Y/N)  
ARE ALL WIRING TERMINALS (including main power supply) TIGHT? (Y/N)  
HAVE OUTDOOR UNIT CRANKCASE HEATERS BEEN ENERGIZED FOR 24 HOURS? (Y/N)  
INDOOR UNIT  
HAS WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE? (Y/N)  
ARE PROPER AIR FILTERS IN PLACE? (Y/N)  
HAVE FAN AND MOTOR PULLEYS BEEN CHECKED FOR PROPER ALIGNMENT? (Y/N)  
DO THE FAN BELTS HAVE PROPER TENSION? (Y/N)  
PIPING  
HAS FOAM SHIPPING BLOCK BEEN REMOVED FROM THE TXV (Thermostatic Expansion Valve)? (Y/N)  
ARE LIQUID LINE SOLENOID VALVES LOCATED AT THE INDOOR UNIT (524J***A) OR OUTDOOR UINT  
(524J*25H) COILS AS REQUIRED? (Y/N)  
HAVE LEAK CHECKS BEEN MADE AT COMPRESSORS, CONDENSERS, INDOOR COILS,  
TXVs (Thermostatic Expansion Valves) SOLENOID VALVES, FILTER DRIERS, AND FUSIBLE PLUGS  
WITH A LEAK DETECTOR? (Y/N)  
LOCATE, REPAIR, AND REPORT ANY LEAKS  
HAVE ALL COMPRESSOR SERVICE VALVES BEEN FULLY OPENED (BACKSEATED) (Y/N)  
ARE THE COMPRESSOR OIL SIGHT GLASSES SHOWING CORRECT LEVELS? (Y/N)  
35  
CHECK VOLTAGE IMBALANCE  
LINE-TO-LINE VOLTS:  
(AB + AC + BC)/3 = AVERAGE VOLTAGE =  
MAXIMUM DEVIATION FROM AVERAGE VOLTAGE =  
VOLTAGE IMBALANCE = 100 X (MAX DEVIATION)/(AVERAGE VOLTAGE) =  
AB  
V
AC  
V
BC  
V
V
V
IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START SYSTEM!  
CALL LOCAL POWER COMPANY FOR ASSISTANCE.  
III. START--UP  
CHECK INDOOR FAN MOTOR SPEED AND RECORD.  
AFTER AT LEAST 10 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS:  
COMP A1  
COMP B1  
OIL PRESSURE  
SUCTION PRESSURE  
SUCTION LINE TEMP  
DISCHARGE PRESSURE  
DISCHARGE LINE TEMP  
ENTERING OUTDOOR UNIT AIR TEMP  
LEAVING OUTDOOR UNIT AIR TEMP  
INDOOR UNIT ENTERING AIR DB TEMP  
INDOOR UNIT ENTERING AIR WB TEMP  
INDOOR UNIT LEAVING AIR DB TEMP  
INDOOR UNIT LEAVING AIR WB TEMP  
COMPRESSOR AMPS (L1/L2/L3)  
____/____/____  
____/____/____  
CHECK THE COMPRESSOR OIL LEVEL SIGHT GLASSES, ARE THE SIGHT GLASSES SHOWING  
OIL LEVEL AT 1/8 to 1/3 FULL? (Y/N)  
NOTES:  
Catalog No: II524J---07  
2011 Bryant Heating and Cooling Systems. D 7310 W. Morris St. D Indianapolis, IN 46231  
Printed in U.S.A.  
Edition Date: 01/11  
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.  
Replaces: II524J---05  
36  

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