Heatcraft Refrigeration Products Blower 4346B001 User Manual

Bulletin H-IM-71A  
Part No. 4346B001  
August 2002  
(Replaces H-IM-71, August 1996)  
Air Handler Unit  
Installation & Operations Manual  
TABLE OF CONTENTS  
Coil Stacking ........................................................................................ 5  
Condensate Drain Traps ....................................................................... 4  
Direct Expansion Coils ......................................................................... 3  
Filter Quantities.................................................................................... 8  
Freezing Temperatures ........................................................................ 6  
Inspection ............................................................................................ 2  
Installation ........................................................................................... 2  
Internal Isolation.................................................................................. 4  
Maintenance ........................................................................................ 4  
Motors & Drives ................................................................................... 2  
Replacement Parts ............................................................................... 8  
Section Assembly................................................................................. 5  
Shipment of Sections........................................................................... 7  
Start-up................................................................................................ 4  
Steam Coils........................................................................................... 2, 3  
Water Coils ........................................................................................... 3  
Weights................................................................................................ 7  
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When two or more steam coils are furnished in a unit,  
provide separate traps for each coil. Size traps with  
ample capacity using the maximum heating load and  
service factor recommended b y the trap manufacturer.  
When the system is started up the damper should remain  
closed for approximately ten minutes after the steam  
valve is opened.  
Properly locate all temperature sensing elements at a  
point of true average air mixture temperature.  
Select control valves in accordance with the  
recommendations of the control manufacturer using  
actual heating loads.  
Refer to “Typical Steam Coil Piping Diagrams” for  
controls positioning and piping configuration.  
Install suitable strainer ahead of all automatic valves and  
traps to catch dirt and scale. Provide adequate air vents  
to expel air and other non-condensable.  
When face and bypass dampers are used, it is good  
practice to install on the coil a valve which closes as  
the face damper closes to prevent over heating due to  
damper leakage or heat picked up by the air wiping the  
exposed coil face.  
Control valves used for Type “J”, “NFS”, “RA” and  
“NFD” coils must be gradual acting modulating type with  
veeport.  
Water Piping  
Where a control valve is used for Type “S” or “R” coils  
and when the entering air temperature is below 35ºF.,  
use a two position valve. Locate control element in the  
entering air stream so that valve will remain open with  
a minimum of five pounds steam pressure when the  
entering air temperature is below 35ºF.  
All piping must be supported independent coils.  
Swing joints or flexible fittings must be provided to absorb  
expansion and contraction strains. Rigid piping may also  
reduce effectiveness of vibration isolators.  
Typical Steam Coil Piping  
The water supply should always be connected to the  
bottom inlet of the coil. The coil connections are identified  
with stickers.  
Low Pressure Open Gravity Return System  
Steam Main  
Water coils , 3 through 10 rows, are supplied with a vent  
and drain connection (1/4” MPT) which extends through  
the unit casing.  
Gate Valve  
Strainer  
Open Vent  
Control Valve  
Union  
For protection of coils exposed to freezing temperatures,  
refer to page 6.  
Vacuum Breaker  
1/2”-15” Check Valve  
Coils must be adequately vented in order to prevent air  
binding.  
Gate Valve  
12” Minimum  
Union  
Combination Float  
and  
Direct Expansion  
Union  
Strainer  
Dirt Pocket  
Thermostatic Trap  
Both the liquid distributor and the suction line extend  
through the casting.  
Return Main  
High Pressure System  
The expansion valve utilized must be of the external  
equalizer tube type. The expansion valve bulb must be  
located on the suction line between the coil and the 1/4”  
external equalizer tube. Never locate the bulb in a trap.  
Steam Main  
Gate Valve  
Strainer  
Control Valve  
All refrigerant piping practices used should be in  
accordance with local codes and latest ANSI Standard  
B9 Safety Code. Hard drawn type “L” or “K” copper tubing  
should be used. Soft tubing where bending is required  
may be used provided it is protected in accordance with  
local code restrictions.  
Union  
Vacuum Breaker  
1/2”-15” Check Valve  
Gate Valve  
Good Practice should be followed as to pulling adequate  
vacuum, tubes cleaned of foreign material, etc.  
Union  
12” Minimum  
Float or  
Bucket Trap  
Union  
Strainer  
Dirt Pocket  
Return Main  
3
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Start-Up  
Condensate Drain Traps  
Make sure all bolts and screws are tight.  
The condensate drain trap piping must be properly  
designed to insure the removal of condensate. Incorrect  
trapping can hold water in pan causing overflow. On  
blow-thru units, particular, system air can escape down  
the drain with incorrect trapping.  
Remove tagged shipping tie-down bolts and spacers  
from the fan and motor assembly before start-up.  
(Internally isolated units only.)  
Check the sheaves to see if they are alignment and  
make suer the set screws are tight. Make sure that  
the dimension across the top is equal on all grooves,  
otherwise excessive belt wear will result.  
Condensate Drain Trap  
(Air Seal)  
Check for proper rotation of the blower pulley. Three  
phase motor rotation can be reversed by exchanging  
two of the three leads at the motor starter. The rotation  
of single phase motors can be reversed by exchanging  
leads inside the motor junction box. (See motor wiring  
diagram.)  
1 1/4” Pipe Drain  
Check the amperage draw of the motor. This should not  
exceed the nameplate amps shown on the motor serial  
plate.  
(a) On draw-thru units (A) shall be equal to or  
greater the coils section’s negative pressure at  
operating conditions.  
After approximately two weeks of operation, the belts  
will have nearly acquired their permanent stretch. After  
this interval, the belt tension should be checked again  
and proper adjustment made.  
(b) On blow-thru units (A) can be as small as 1” but  
(B) must equal or exceed the total static pressure  
in the coil section.  
Maintenance  
Internally Isolated Units  
The belt tension should be checked at three month  
intervals.  
Sizes 03-41 which have optional internal spring isolation  
have four hold-down shipping braces. Remove the 1/2”  
bolt between each shipping brace and the motor base,  
then loosen the bolt to the frame and slide the brace to  
the end of the slot so that the brace is 5/8” from motor  
support base. Re-tighten the bolt so that the shipping  
brace acts as a snubber on fan start up.  
The fan shaft bearings on Sizes 03, 06, 08, 10, and  
12 with low pressure forward curved fans have lifetime  
lubricated bearings. All other units have ball bearings  
which can be relubricated. These bearings mounted  
inside the fan section have extended lubrication lines  
which are mounted on the outside of the fan panels.  
The suggested greasing intervals indicated in a sticker  
attached to the unit.  
It is recommended that bearings be lubricated with a  
high quality lithium grease at intervals indicated on  
sticker attached to the unit.  
Instructions are included on the motor nameplate for  
lubricating the motor bearings.  
The filter should be periodically inspected and replaced  
or cleaned when necessary. Dirt filters reduce the sir  
flow which reduces the capacity of the system.  
Do not operate system without filters.  
4
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Typical ‘Accessory-to-Coil-Section’  
and ‘Accessory-to-Accessory’ Attaching Method  
5
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have anti-freeze added to it. The most positive way to  
assure the mixing of the anti-freeze is to make a run-  
around loop with a circulating pump.  
Water Coils Exposed  
to Freezing Temperature  
Water coils exposed to freezing temperatures must be  
protected from freeze-up by either adding anti-freeze  
solution to coils or proper draining of the coils.  
1. Open all connections and drain the coil as  
thoroughly as possible.  
2. The anti-freeze solution should be added to the  
coil and circulated through the coil until the  
solution is thoroughly mixed and all air is purged  
from the coil. The air vent should be opened  
during the filling operation and cracked during the  
pumping operation to accomplish this. When  
the solution has circulated for 15-20 minutes,  
the concentration of the solution should be  
checked with suitable hydrometer. If the  
concentration is low, add more glycol and  
operate the pump again. A typical piping diagram  
is shown in Figure 2.  
The coils are circuited so that there are no trapped  
circuits. However, because of the serpentine nature of  
the circuiting, it is almost impossible to adequately drain  
the coils by gravity alone. Particularly on longer coils,  
even a fraction of a degree deviation from a horizontal  
plane can lead to water being trapped within the  
serpentine.  
Water that failed to drain from a single tube,  
or even part of a tube, can cause the tube to  
rapture upon freezing.  
3. The anti-freeze solution may then be left in  
the coils or drained and used to flush another  
coil. The concentration must be checked for each  
coil flushed.  
Draining Coils Using Supplemental  
Air Blower  
Ideally, a blower capable of delivering 150 CFM of air  
at approximately 40-50 inches of water or more should  
be used. Some small air compressors, while delivering  
higher pressures, probably will not deliver sufficient  
volume of air and this is equally as important.  
The adding of anti-freeze to a system exposed to  
freezing conditions may be necessary if the system  
must be operation at a moment’s notice. This affects  
the chiller and coil performance and must be taken into  
consideration when selection the components.  
1. Drain the coils by gravity after opening the  
supply, return, vent and drain connection.  
Note: Most anti-freeze solution will be furnished with  
a chart of concentration at freezing point. It is also  
important to be certain that the anti-freeze solution  
used is not corrosive to the tubing.  
2. Connect the blower to large connection that  
is at the greatest elevation. The small vent or  
drain connection on the header to which the  
blower is connected should be closed.  
Refer to Figure 1 for typical hook -up during the  
blow-out operation.  
It is helpful to tap the coil causing along the  
length of the coil during the draining process.  
The blower should be operated until no moisture  
can be detected leaving the coil. Then, shut the  
blower off and permit the coil to stand for a few  
minutes. This will permit the moisture that has  
adhered to the walls to accumulate. Then the  
blowing out operation should be repeated.  
Ideally, the coil should be permitted to stand  
twenty-four (24) hours and blown out again.  
3. Leave all connections open until coil is put into  
operation.  
Installation of Anti-Freeze Solution  
A second way to prevent a coil freeze-up is to add an  
anti-freeze to the coil, such as industry inhibited glycol.  
The coil should be valved off so that only the coil would  
6
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Air Handler Component  
Section  
Unit Size  
03 06 08 10 12 14 18 20 26 34 41 50 65 75  
Model ID Description Fan  
S
S
L
L
V
HD  
HD  
FO  
FO  
Short  
Short  
Long  
Long  
Vertical  
FC  
AF  
FC  
AF  
FC  
290 430 500 550 650 790 816 836 968 1188 1386  
946 1177 1518 1782 2700 3300 4496  
318 450 553 600 732 988 1033 1067 1221 1474 1672  
1177 1430 1793 2057 2850 3480 4690  
296 387 482 535 615 860 1004 1111 1254 1628 1881  
170 280 312 360 450 510 564 605 693 902 1078  
Heating Duty FC  
Heating Duty AF  
Fan Only  
Fan Only  
162 266 296 342 428 485 536 575 658 857 1024  
715 891 1221 1474 2600 3200 3359  
FC  
AF  
679 846 1160 1400 2470 3040 3191  
83  
95  
99 104 106 108 115 160 185 255 315 384  
Flat -TA & Pleated 2”  
Flat -Permanent 2”  
Flat -Pleated 4”  
60  
66  
75  
73  
79  
88  
89 101 106 114 126 135 165 240 275 390 460 560  
98 110 119 124 126 127 130 185 210 298 351 428  
High Capacity -TA & Pleated  
High Capacity -Permanent  
High Efficiency- 21” Section  
High Efficiency- 28” Section  
High Efficiency- 44” Section  
Economizer  
Combination Filter & Economizer  
Internal Face and Bypass  
External Face and Bypass  
S Auxiliary Coil Module  
L Auxiliary Coil Module  
Electric Heater  
149 168 187 206 215 224 230 234 244 260 290 360 440 535  
155 176 196 216 225 234 240 244 254 365 450 520 650 790  
82  
95 112 133 133 153 175 180 194 235 248 269 330 359  
103 121 143 170 170 196 225 224 246 296 318 345 425 463  
127 150 173 201 201 230 264 274 299 358 380 412 516 552  
174 195 216 224 236 247 254 260 300 430 550 680 800 975  
323 363 403 430 451 471 484 494 544 690 840 1040 1240 1510  
52  
57  
68  
75  
79 100 115 138 148 155 180 260 350 420 520 634  
87 110 128 155 166 175 200 286 385 462 650 793  
129 164 204 208 223 306 280 261 310 331 362 515 640 1305  
157 184 257 258 305 504 497 492 563 617 648 665 820 1499  
223 356 454 550 670 774 954 1104 1434 1760 2118 2481 3143 3599  
1
2
3
4
6
8
Row  
Row  
Row  
Row  
36  
50  
56  
70  
80  
94 106 110 112 144 195 239 339 406 538  
80 101 120 143 164 169 173 228 318 396 562 673 891  
5/8” Tube  
(Type 5)  
10 FPI  
64 106 134 161 195 223 231 236 314 444 557 737 936 1168  
78 132 168 202 246 282 292 299 398 569 718 913 1199 1445  
Row 109 187 240 290 353 408 422 432 578 830 1052 1278 1677 2017  
Row 141 242 311 379 461 534 552 565 760 1092 1385 1638 2154 2589  
10 Row 172 297 383 467 569 659 682 699 942 1355 1718 2194 2893 3478  
(Coil weight include the weight of water when filled)  
To Estimate Weights for Other Coils  
TA = Throw away type filters  
AF = Airfoil Fan  
FC = Forward Curved Fan  
For 1/2” Tube (Type A):  
For Small Coil:  
For 14 FPI:  
Multiply Type 5 Coil Weight by-  
Multiply Large Coil Weight by-  
Multiply 10 FPI Coil weight by-  
Multiply 10 FPI Coil weight by-  
Multiply 10 FPI Coil weight by-  
Multiply 10 FPI Coil weight by-  
0.800  
0.823  
1.121  
1.065  
0.935  
0.915  
For 12 FPI:  
For 8 FPI:  
For 6 FPI:  
Air Handler Motor and Drive  
Motor Horsepower, 1800 RPM  
7.5 10 15 20 25 30 40 50 60 75  
55 65 86 105 172 193 253 286 348 400 529 600 720 828  
Weight in pounds  
Motor Open Single Speed Motor  
1
1.5-2  
3
5
and  
Totally Enclosed Fan Cooled (TEFC)  
High Efficiency Open Single Speed  
56 71 88 104 178 194 275 336 411 461 624 670  
67 74 114 127 209 216 341 384 396 427 621 623  
Drive  
Weight Open 2 Speed, 2 Winding  
71 97 115 160 291 267 368 356 366  
T – Frame Size  
143 145 182 184 213 215 254 256 284 286 324 326 364 365  
Central Station Air Handler, Shipment of Assemblies - Basic Unit  
Horizontal Style Units, fan, coil, flat filter section Vertical Style Units, fan, coil, flat filter section  
These diagram show  
typical shipments.  
Some set-ups may  
vary with certain units.  
Consult the factory if  
you require a specific  
assembly shipped in a  
special way.  
We ship high capacity  
and high efficiency filter  
sections, economizers,  
dampers, and electric  
heat sections separately.  
S, L, FO,  
HD Sizes  
03 – 18  
FS  
CS  
V Sizes  
03 – 18  
FS  
CS  
S, L, FO,  
HD Sizes  
20 – 75  
V Sizes  
20 – 41  
7
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Quantity and Dimensions of Filters for:  
Flat Filter Section  
Filter  
Air Handler Unit Size  
03 06 08 10 12 14 18 20 26 34 41 50 65 75  
Filter  
Dimensions  
2” x 16” x 20”  
2” x 20” x 20”  
2” x 16” x 25”  
2” x 20” x 25”  
Dimensions  
2” x 16” x 20”  
2” x 20” x 20”  
2” x 16” x 25”  
2” x 20” x 25”  
1
1
2
2
2
4
3
3
1
1
2
2
2
2
2
2
6
4
4
8
4
8
6
12  
7
14  
8
20  
4
10  
4
10  
High Capacity Filter Sections  
2
2
4
6
2
4
8
4
4
6
4
4
6
2
10  
4
20  
4
20  
30  
12  
30  
14  
35  
2” x 16” x 20”  
2” x 20” x 20”  
2” x 16” x 25”  
2” x 20” x 25”  
2” x 16” x 20”  
2” x 20” x 20”  
2” x 16” x 25”  
2” x 20” x 25”  
High Efficiency Filter Sections  
1
1
2
2
2
2
3
2
3
3
3
6
4
4
5
5
10  
10  
5
15  
15  
3
20  
4
24” x 24”  
12” x 24”  
24” x 24”  
12” x 24”  
Replacement Parts- Note: Confirm the shaft Diameter, when Ordering Parts.  
03-12, Forward Curved  
Unit Size, Fan Diameter, Type  
Shaft  
Diameter  
Bearing  
Part No.  
Bearing  
Type  
Shaft  
Part No.  
Blower  
Assembly  
03 FC  
9”  
9”  
Low Pressure  
3/4”  
1”  
1”  
1 3/16”  
1”  
1 3/16”  
1”  
1 3/16”  
1”  
1 3/16”  
4215V  
4352N  
4350N  
4353N  
4350N  
4353N  
4350N  
4353N  
4350N  
4353N  
Cartridge  
Pillow Block  
Cartridge  
Pillow Block  
Cartridge  
Pillow Block  
Cartridge  
Pillow Block  
Cartridge  
Pillow Block  
4317Z  
4343N  
4318Z  
4344N  
4319Z  
4345N  
4320Z  
4346N  
4320Z  
4346N  
4317M  
4322M  
4318M  
4323M  
4319M  
4324M  
4320M  
4325M  
4320M  
4325M  
03 FC  
06 FC  
06 FC  
08 FC  
08 FC  
10 FC  
10 FC  
12 FC  
12 FC  
Med Pressure  
Low Pressure  
Med Pressure  
Low Pressure  
Med Pressure  
Low Pressure  
Med Pressure  
Low Pressure  
Med Pressure  
12”  
12”  
15”  
15”  
18”  
18”  
18”  
18”  
Note: For sizes 03-12, it is less expensive to replace the blower assembly than to replace the blower wheel. Blower assembly also includes bearings and shaft  
14-41, Forward Curved  
Unit size, Fan Diameter, Type  
Shaft  
Diameter  
Pillow Block  
Bearing  
Shaft  
Wheel  
Blower  
Wheel  
Blower  
Cut-Off  
14 FC  
20”  
20”  
20”  
20”  
22”  
22”  
25”  
30”  
Low Pressure  
1 3/16”  
1 3/16”  
1 3/16”  
1 3/16”  
1 7/16”  
1 7/16”  
1 11/16”  
1 15/16”  
4353N  
4353N  
4353N  
4353N  
5562N  
5562N  
5563N  
5564N  
4342N  
4342N  
4342N  
4342N  
4522R  
4522R  
4525R  
4500S  
5154E  
5154E  
5154E  
5154E  
5153E  
5153E  
5179D  
5178D  
Part of Housing  
Part of Housing  
Part of Housing  
Part of Housing  
4418T  
14 FC  
18 FC  
18 FC  
20FC  
26 FC  
34 FC  
41 FC  
Med Pressure  
Low Pressure  
Med Pressure  
Med Pressure  
Med Pressure  
Med Pressure  
Med Pressure  
4418T  
4419T  
4421T  
Note: For sizes 14-41 Forward Curved Fans, it is less expensive to replace the blower wheel than to replace the blower assembly.  
26-75, Air Foils  
Unit size, Fan Diameter, Type  
Shaft  
Diameter  
Pillow Block  
Bearing  
Air Foil Note:  
20 AF  
18 1/4”  
18 1/4”  
24 1/2”  
30”  
32 3/8”  
39 3/8”  
39 3/8”  
Med Pressure  
1 7/16”  
1 7/16”  
1 15/16”  
2 3/16”  
2 7/16”  
2 11/16”  
2 11/16”  
5562N  
5562N  
5564N  
5521T  
5597T  
5875E  
5875E  
For sizes 41-75 Air Foils, for parts other than  
bearing replacement, Contact the Factory.  
Call the parts department, 800-686-7278,  
with air handler model number, and discharge  
arrangement. Heatcraft Refrigeration Products  
can then advise the correct blower assembly  
description for you.  
26 AF  
34 AF  
41 AF  
50 AF  
65 AF  
75 AF  
Med Pressure  
Med Pressure  
Med Pressure  
Med Pressure  
Med Pressure  
Med Pressure  
Visit our website at www.heatcraftrpd.com for technical literature online.  
Since product improvement is a continuing effort, we reserve the right to make changes  
in specifications without notice.  
Heatcraft Refrigeration Products LLC  
2175 West Park Place Blvd. • Stone Mountain, GA 30087  
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