Daikin AGZ 130D Unit installation

Installation and Maintenance Manual
IMM AGZ-7
Group: Chiller
Part Number: 331374001
Effective: February 2005
Supercedes: IOMM AGZ-6
Air-Cooled Scroll Compressor Chiller
AGZ 026BS/BH through 130BS/BH, Packaged
AGZ 026BB/BM through 130BB/BM, Remote Evaporator
60 Hertz, R-22, R-407c
Table of Contents
Introduction ....................................... 3
Startup ..............................................59
General Description......................................3
Inspection .....................................................3
Nomenclature ...............................................3
Pre Start-up ................................................ 59
Start-Up ..................................................... 59
Shutdown ................................................... 60
Water Piping Checkout .............................. 60
Refrigerant Piping Checkout...................... 60
Electrical Check Out.................................. 61
Installation ......................................... 4
Handling .......................................................4
Location........................................................5
Vibration Isolators ......................................12
Ambient Air Temperature Limitations........15
Water Piping...............................................17
Flow Switch................................................19
Water Connections......................................20
System Water Volume Considerations ........20
Variable Speed Pumping ............................20
Glycol Solutions .........................................20
Operating/Standby Limits...........................24
Evaporator Flow and Pressure Drop Water Flow
Limitations..................................................24
Wind Baffles and Hail Guards....................26
Component Operation.....................61
Hot Gas Bypass (Optional) ........................ 61
VFD Low Ambient Control (Optional)...... 62
Filter-Driers ............................................... 62
System Adjustment .................................... 62
Liquid Line Sight Glass ............................. 62
Refrigerant Charging ................................. 62
Thermostatic Expansion Valve .................. 63
Crankcase Heaters ..................................... 63
Evaporator ................................................. 63
Phase Voltage Monitor (Optional) ............. 63
Unit Maintenance.............................64
Optional Features ............................ 28
Preventive Maintenance Schedule ............. 65
Controls ......................................................28
BAS Interface.............................................28
Remote Operator Interface Panel ...............29
Service...............................................66
Physical Data ................................... 31
Liquid Line Solenoid Valve ....................... 66
Evaporator ................................................. 67
Refrigerant Charging ................................. 67
Electrical Data, Standard Ambient 36
Warranty Statement ........................68
Electrical Data High Ambient ........ 46
AGZ Troubleshooting Chart...........69
Dimensional Data ............................ 54
R-407C Units.................................... 57
Manufactured in an ISO Certified facility
"McQuay" is a registered trademark of McQuay International
©2004 McQuay International
Illustrations and data cover McQuay International products at the time of publication and we reserve the right to
make changes in design and construction at anytime without notice.
2
AGZ 026B through 130B
IMM AGZ-7
Introduction
General Description
McQuay Air-Cooled Global Water Chillers are complete, self-contained automatic
refrigerating units. Every unit is completely assembled, factory wired, charged, and
tested. Each unit consists of twin air-cooled condensers with integral subcooler
sections, two tandem or triple scroll compressors, brazed-plate or replaceable tube,
dual circuit shell-and-tube evaporator, and complete refrigerant piping. Liquid line
components include manual liquid line shutoff valves, sight-glass/moisture indicators,
solenoid valves, and thermal expansion valves. Other features include compressor
crankcase heaters, an evaporator heater for chilled water freeze protection, limited
pumpdown during “on” or “off” periods, automatic compressor lead-lag to alternate the
compressor starting sequence, and sequenced starting of compressors.
The electrical control center includes all equipment protection and operating controls
necessary for dependable automatic operation. Condenser fan motors are protected in
all three phases and started by their own three-pole contactors.
Manuals
This manual covers the installation, maintenance and service for dual circuit, AGZ,
scroll compressor chillers. Operating information is contained in the operating manual
OM AGZ-1.
Inspection
Check all items carefully against the bill of lading. Inspect all units for damage upon
arrival. Report shipping damage and file a claim with the carrier. Check the unit
nameplate before unloading, making certain it agrees with the power supply available.
McQuay is not responsible for physical damage after the unit leaves the factory.
Note: Unit shipping and operating weights are available in the Physical Data
tables beginning on page 31.
Nomenclature
A G Z - XXX B S
Application
S= Standard Ambient, Packaged
M= Standard Ambient, Remote
H= High Ambient, Packaged
B= High Ambient, Remote
Air-Cooled
Global
Design Vintage
Scroll Compressor
Model Size
(Nominal Tons)
IMM AGZ-7
AGZ 026B through 130B
3
Installation
Note: Installation is to be performed by qualified personnel who are familiar
with local codes and regulations.
WARNING
Sharp edges on unit and coil surfaces are a potential hazard to personal safety.
Avoid contact with them.
Handling
Be careful to avoid rough handling of the unit. Do not push or pull the unit from
anything other than the base. Block the pushing vehicle away from the unit to prevent
damage to the sheet metal cabinet and end frame (see Figure 1).
To lift the unit, 2 1/2" (64mm) diameter lifting tabs are provided on the base of the
unit. Arrange spreader bars and cables to prevent damage to the condenser coils or
cabinet (see Figure 2).
Figure 1, Suggested Pushing Arrangement
Blocking is required
across full width
Figure 2, Suggested Lifting Arrangement
Spreader bars
required
(use caution)
Number of fans may vary
from this diagram. The lifting
method will remain the same.
All rigging locations
must be used.
4
AGZ 026B through 130B
IMM AGZ-7
Location
Figure 3, Clearances
Unit Placement
AGZ units are for outdoor applications and
can be mounted either on a roof or at ground
level. For roof mounted applications, install
the unit on a steel channel or I-beam frame to
FT. (1220mm)
support the unit above the roof. For ground 4CLEARANCE
FOR
level applications, install the unit on a SERVICE ACCESS
substantial base that will not settle. A onepiece concrete slab with footings extended
below the frost line is recommended. Be sure
the foundation is level within 1/2" (13mm)
over its length and width. The foundation
must be strong enough to support the weights
listed in the Physical Data Tables beginning on page 31.
SEE ATTACHED TABLE
DIMENSION “A”
4 FT. (1220)
CLEARANCE FOR
SERVICE ACCESS
SEE ATTACHED TABLE
DIMENSION “A”
Table 1, Recommended Minimum Clearances
Model Size
026B – 070B
075B – 130B
Coil Side “A”
ft (m)
4 (1.2)
6 (1.8)
“B”
ft (m)
8 (2.4)
12 (3.6)
“C”
ft (m)
6 (1.8)
8 (2.4)
End Opposite
Controls ft (m)
4 (1.2)
4 (1.2)
Control Panel End
ft. (m)
4 (1.2)
4 (1.2)
Clearances
Do not block the flow of air to and
from the condenser coil. Restricting
airflow or allowing air recirculation
will result in a decrease in unit
performance and efficiency because
discharge pressures are increased.
There must be no obstruction above
the unit that would deflect discharge
air downward where it could be
recirculated back to the inlet of the
condenser coil. The condenser fans
are propeller type and will not
operate with ductwork.
Install the unit with enough side
clearance for air to enter the coil and
for servicing. Provide service access
to the evaporator, compressors,
electrical control panel and piping
components.
Do not allow debris to accumulate
near the unit where it could be drawn
into the condenser coil.
Keep
condenser coils and fan discharge
free of snow or other obstructions to
permit adequate airflow for proper
operation.
IMM AGZ-7
AIR
DISCHARGE
AIR
DISCHARGE
AIR FLOW
AIR FLOW
AIR FLOW
“B”
The recommended minimum side clearance between two units
is dimension “B’ in table on this page.
AIR
DISCHARGE
AIR FLOW
AIR FLOW
“C”
“C”
The unit must not be installed in a pit or enclosure that is
deeper or taller than the height of the unit unless extra space
is provided. The minimum clearance on each
side of the unit is dimension “C” in table on this page.
AGZ 026B through 130B
5
Restricted Air Flow
General
The clearances required for design-life operation of AGZ air-cooled condensers are
described in the previous section. Occasionally, these clearances cannot be maintained
due to site restrictions such as units being too close together or a fence or wall
restricting airflow, or both.
Fortunately, the McQuay AGZ chillers have several features that can mitigate the
problems attributable to restricted airflow.
•
The condenser section is shaped as shown Figure 4. This allows inlet air for these
coils to come in from either side. A vertical coil and its adjacent angled coil are
manifolded together to serve one refrigerant circuit.
•
The MicroTech II™ control is proactive in response to “off-design conditions”. In
the case of single or compounded influences restricting airflow to the unit, the
microprocessor will act to keep the compressor(s) running (possibly at reduced
capacity) rather than allowing a shut-off on high discharge pressure.
•
The MicroTech II™ control can be programmed to sequence the compressors in the
most advantageous way. For example, in the diagram shown below, it might be
desirable to program circuit #1 to be the lag circuit (last circuit to reach full load)
during periods of high ambient temperatures.
Building
Figure 4, Coil and Fan Arrangement
Circuit #1
Circuit #2
NOTE: Models AGZ 026 to 035 do not have an interior slanted coil.
The following sections discuss the most common situations of condenser air restriction
and give capacity and power adjustment factors for each. Note that in unusually severe
conditions, the MicroTech II™ controller would adjust the unit operation to remain
online until a less severe condition is reached.
6
AGZ 026B through 130B
IMM AGZ-7
Case 1, Building or Wall on One Side of One Unit
The existence of a screening wall or the wall of a building in close proximity to an air-cooled
chiller is common in both rooftop and ground level applications. Hot air recirculation on the
coils adjoining the wall will increase compressor discharge pressure, decreasing capacity and
increasing power consumption. Only the compressor(s) connected to these coils will be
affected. Circuits opposite the wall are unaffected.
When close to a wall, it is desirable to place chillers on the north or east side of them. It is
also desirable to have prevailing winds blowing parallel to the unit’s long axis. The worst
case is to have wind blowing hot discharge air into the wall.
Figure 5, Unit Adjacent to Wall
H
D
Figure 6, Adjustment Factors
AGZ
AGZ
075-130 026-070
3.0
4.5 ft.
(1.4m)
3.5 ft.
(1.0m)
2.0
AGZ
AGZ
075-130 026-070
4.0
3.5 ft.
(1.0m)
6 ft.
(1.8m)
4 ft.
(1.2m)
8 ft.
(2.4m)
6 ft.
(1.8m)
3.0
1.0
6 ft.
(1.8m)
4 ft.
(1.2m)
.5
8 ft.
(2.4m)
6 ft.
(1.8m)
2.0
0
IMM AGZ-7
4.5 ft.
(1.4m)
0
AGZ 026B through 130B
7
Case 2, Two Units Side By Side
Two or more units sited side by side are common. If spaced closer than 12 feet (3.7 meters) or
8 feet (2.5meters) depending on size, it is necessary to adjust the performance of each unit;
circuits adjoining each other are affected. NOTE: This case applies only to two units side by
side. See Case 3 for three or more parallel units. If one of the two units also has a wall
adjoining it, see Case 1. Add the two adjustment factors together and apply to the unit located
between the wall and the other unit.
Mounting units end to end will not necessitate adjusting performance. Depending on the
actual arrangement, sufficient space must be left between the units for access to the control
panel door opening and/or evaporator tube removal. See “Clearance” section of this guide for
requirements for specific units.
Figure 7, Two Units Side by Side
Figure 8, Adjustment Factor
3.0
6.0
2.0
4.0
1.0
2.0
0
8
0
9
AGZ 075-130 (2.7)
10
(3.0)
11
(3.3)
12
(3.6)
9
AGZ 075-130 (2.7)
10
(3.0)
11
(3.3)
12
(3.6)
AGZ 026-070 6.5
(2.0)
7
(2.1)
7.5
(2.2)
8
(2.4)
AGZ 026-070 6.5
(2.0)
7
(2.1)
7.5
(2.2)
8
(2.4)
AGZ 026B through 130B
IMM AGZ-7
Case 3, Three or More Units Side By Side
When three or more units are side by side, the outside chillers (1 and 3 in this case) are
influenced by the middle unit only on their inside circuits. Their adjustment factors will be the
same as Case 2. All inside units (only number 2 in this case) are influenced on both sides and
must be adjusted by the factors shown below.
Figure 9, Three or More Units
Chiller 1
Chiller 2
Chiller 3
Figure 10, Adjustment Factor
4.0
8.0
3.0
6.0
2.0
4.0
1.0
2.0
0
0
AGZ 075-130
15
(4.6)
16
(4.9)
17
(5.2)
18
(5.5)
AGZ 075-130
15
(4.6)
16
(4.9)
17
(5.2)
18
(5.5)
AGZ 026-070
11
(3.3)
12
(3.7)
13
(4.0)
14
(4.3)
AGZ 026-070
11
(3.3)
12
(3.7)
13
(4.0)
14
(4.3)
IMM AGZ-7
AGZ 026B through 130B
9
Case 4, Open Screening Walls
Decorative screening walls are often used to help conceal a unit either on grade or on a rooftop.
These walls should be designed such that the combination of their open area and distance from
the unit do not require performance adjustment. It is assumed that the wall height is equal to or
less than the unit height when mounted on its base support. This is usually satisfactory for
concealment. If the wall height is greater than the unit height, see Case 5, Pit Installation.
The distance from the ends of the unit to the end walls should be sufficient for service, opening
control panel doors, and pulling evaporator tubes, as applicable.
If each side wall is a different distance from the unit, the distances can be averaged providing
either wall is not less than 8 feet (2.4 meters) from the unit. For example, do not average 4 feet
and 20 feet to equal 12 feet.
Figure 11, Open Screening Walls
Figure 12, Wall Free Area vs Distance
AGZ
026-070
AGZ
075-130
4
(1.2)
6
(1.8)
3.5
(1.0)
5
(2.0)
3.0
(0.9)
4
(1.2)
2.5
(0.7)
3
(0.9)
0
10
10
20
AGZ 026B through 130B
30
40
50
IMM AGZ-7
Case 5, Pit/Solid Wall Installation
Pit installations can cause operating problems and great care should be exercised if they are
to be used on an installation. Recirculation and restriction can both occur. A solid wall
surrounding a unit is substantially the same as a pit and the data presented here should be
used.
Steel grating is sometimes used to cover a pit to prevent accidental falls or trips into the pit.
The grating material and installation design must be strong enough to prevent such accidents,
yet provide abundant open area or serious recirculation problems will occur. Have any pit
installation reviewed by McQuay application engineers prior to installation to make sure it
has sufficient air-flow characteristics. The installation design engineer must approve the
work to avoid the risk of accident.
Figure 13, Pit Installation
Figure 14, Adjustment Factor
AGZ
026-070
D=4
(1.4)
D=5
(2.0)
AGZ
026-070
D=4
(1.4)
D=5
(2.0)
AGZ
075-130
D=6
(1.8)
D=8
(2.4)
AGZ
075-130
D=6
(1.8)
D=8
(2.4)
AGZ
075-130
D=10
(3.1)
IMM AGZ-7
AGZ
026-070
D=7
(2.1)
AGZ 026B through 130B
AGZ
075-130
D=10
(3.1)
AGZ
026-070
D=7
(2.1)
11
Sound Isolation
The low sound level of the AGZ chiller is suitable for most applications. When additional
sound reduction is necessary, locate the unit away from sound sensitive areas. Avoid
locations beneath windows or between structures where normal operating sounds may be
objectionable. Reduce structurally transmitted sound by isolating water lines, electrical
conduit and the unit itself. Use wall sleeves and rubber isolated piping hangers to reduce
transmission of water or pump noise into occupied spaces. Use flexible electrical conduit to
isolate sound transmission through electrical conduit. Spring isolators are effective in
reducing the low amplitude sound generated by scroll compressors and for unit isolation in
sound sensitive areas.
Vibration Isolators
Vibration isolators are recommended for all roof-mounted installations or wherever
vibration transmission is a consideration. Table 2 lists isolator loads for all unit sizes.
Spring Isolator Dimensions
Neoprene-in-Shear Dimensions
Color Code
Gray
Black, Red
L
5.5
6.25
W
3.37
4.62
H
1.75
1.62
B
0.5
0.5
C
4.12
5.0
D
0.56
0.56
Figure 15 shows isolator locations. See Dimensional Data starting on page 36 for detailed
mounting hole locations.
Isolators are also recommended for slab installations, primarily to keep the unit base from
resting its entire length directly on the slab.
Isolator Installation
The unit should be initially installed on shims or blocks at the listed free height. When all
piping, wiring, flushing, charging, etc. is completed, adjust the springs upward to load
them and to provide clearance to remove the shims or blocks.
Installation of spring isolators requires flexible piping connections and at least three feet of
conduit flex tie-ins. Piping and conduit must be supported independently of the unit.
Figure 15, Isolator Locations
4 or 6 FAN UNIT
8 FAN UNIT
3
4
CONTROL
PANEL
5
6
1
2
3
CONTROL
PANEL
1
12
4
2
AGZ 026B through 130B
IMM AGZ-7
Table 2, AGZ-BS/BH, Isolator Loads At Each Mounting Location (With Aluminum Fins)
(1) Copper
Fin Add
lb.
kg
Unit
Size
No.
of
Fans
lb
kg
lb
kg
lb
kg
lb
kg
lb
kg
lb
kg
lb
kg
026B
4
1281
580
941
426
1020
462
748
339
-
-
-
-
3990
1807
72
32
030B
4
1297
588
952
431
1032
467
759
344
-
-
-
-
4040
1830
72
32
035B
4
1283
581
942
427
1069
484
786
356
-
-
-
-
4080
1848
72
32
040B
4
1360
616
940
426
1082
490
748
339
-
-
-
-
4130
1871
72
32
045B
4
1377
624
952
431
1148
520
793
359
-
-
-
-
4270
1934
72
32
050B
4
1384
627
1016
460
1153
522
847
384
-
-
-
-
4400
1993
119
54
055B
4
1391
630
1085
492
1159
525
905
410
-
-
-
-
4540
2057
119
54
060B
4
1410
639
1099
498
1175
532
916
415
-
-
-
-
4600
2084
142
65
065B
4
1382
626
1214
550
1205
546
1059
480
-
-
-
-
4860
2202
142
65
070B
4
1419
643
1246
564
1238
561
1087
492
-
-
-
-
4990
2260
217
99
075B
6
1854
840
1411
639
1854
840
1411
639
-
-
-
-
6530
2958
217
99
085B
6
1942
880
1479
670
1856
841
1413
640
-
-
-
-
6690
3031
217
99
090B
6
1975
895
1450
657
1975
895
1450
657
-
-
-
-
6850
3103
217
99
100B
8
1464
663
1341
607
1219
552
1400
634
1282
581
1164
527
7870
3565
289
131
110B
8
1513
685
1358
615
1204
545
1513
685
1358
615
1204
545
8150
3692
289
131
120B
8
1656
750
1486
673
1317
597
1582
717
1420
643
1259
570
8720
3950
289
131
130B
8
1714
776
1508
683
1303
590
1714
776
1508
683
1303
590
9050
4100
289
131
1
2
3
4
5
6
Total Unit
NOTE (1): Additional weight for copper coils is per mounting location.
Table 3, Isolator Kit Numbers
AGZ
Model
Spring Kit
Part No.
R-I-S Kit
Part No.
026, 030
035
040, 045
050
055
060
065, 070
075, 085
090
100
110
120,130
330349603
330349603
330349605
330349606
330349607
330349609
330349612
330349613
330349614
330349702
330349703
330349704
330349704
330349705
330349706
330349707
330349708
330349709
Table 4, Isolator Locations
AGZ-B, Chillers
Unit
Size
Operating Weight.
Neoprene-In-Shear Mountings
Spring-Flex Mountings
lbs
kg
1
2
3
4
5
6
1
2
3
4
5
6
026B
3990
1807
Black
Gray
Gray
Gray
-
-
Orange
Purple
Purple
Red
-
-
030B
4040
1830
Black
Gray
Gray
Gray
-
-
Orange
Purple
Purple
Red
-
-
035B
4080
1848
Black
Gray
Gray
Gray
-
-
Orange
Purple
Purple
Red
-
-
040B
4130
1871
Black
Gray
Black
Gray
-
-
Orange
Purple
Purple
Red
-
-
045B
4270
1934
Black
Gray
Black
Gray
-
-
Orange
Purple
Purple
Red
-
-
050B
4400
1993
Black
Gray
Black
Gray
-
-
Orange
Purple
Purple
Red
-
-
055B
4540
2057
Black
Black
Black
Gray
-
-
Orange
Purple
Purple
Purple
-
-
060B
4600
2084
Black
Black
Black
Gray
-
-
Orange
Purple Orange Purple
-
-
065B
4860
2202
Black
Black
Black
Black
-
-
Orange Orange Orange Purple
-
-
070B
4990
2260
Black
Black
Black
Black
-
-
Orange Orange Orange Purple
-
-
075B
6530
2958
Red
Black
Red
Black
-
-
Gray
Orange
Gray
Orange
-
-
085B
6690
3031
Red
Black
Red
Black
-
-
Gray
Orange
Gray
Orange
-
-
090B
6850
3103
Red
Black
Red
Black
-
-
Gray
Orange
Gray
Orange
-
-
100B
7870
3565
Black
Black
Black
Black
Black
Black
Orange Orange Orange Orange Orange Orange
110B
8150
3692
Red
Black
Black
Red
Black
Black
Green
Orange Orange Green Orange Orange
120B
8720
3950
Red
Red
Black
Red
Red
Black
Green
Green Orange Green
Green Orange
130B
9050
4100
Red
Red
Black
Red
Red
Black
Green
Green Orange Green
Green Orange
NOTES:
1. Neoprene-in-shear isolators: Gray=RP-3 Gray, Black=RP-4 Black, Red=RP-4 Red.
IMM AGZ-7
AGZ 026B through 130B
13
Table 5, AGZ BM/BB, Isolator Loads At Each Mounting Location (With
Aluminum Fins)
AGZBM/BB
Model
AGZ 026
AGZ 030
AGZ 035
AGZ 040
AGZ 045
AGZ 050
AGZ 055
AGZ 060
AGZ 065
AGZ 070
lbs
Shipping
Wt
Operating.
Wt
Loc. 1
Loc. 2
Loc. 3
Loc. 4
Total
(1) Add’l for
Copper Fins
3550
3600
1227
901
849
623
3600
72
kg
1608
1631
556
408
385
282
1631
32
lbs
3550
3600
1227
901
849
623
3600
72
kg
1608
1631
556
408
385
282
1631
32
lbs
3550
3600
1227
901
849
623
3600
72
kg
1608
1631
556
408
385
282
1631
32
lbs
3550
3610
1261
872
873
604
3610
72
kg
1608
1635
571
395
395
274
1635
32
lbs
3590
3650
1275
881
883
611
3650
72
kg
1626
1653
578
399
400
277
1653
32
lbs
3730
3800
1295
951
896
658
3800
119
kg
1690
1721
587
431
406
298
1721
54
lbs
3780
3850
1303
1016
860
671
3850
119
kg
1712
1744
590
460
390
304
1744
54
lbs
3820
4040
1367
1066
903
704
4040
142
kg
1730
1830
619
483
409
319
1830
65
lbs
3970
4070
1305
1146
862
757
4070
142
kg
1798
1844
591
519
390
343
1844
65
lbs
4080
4180
1278
1192
885
825
4180
217
kg
1848
1894
579
540
401
374
1894
99
NOTE (1): Additional weight for copper coils is per mounting location.
Table 6, Isolator Loads At Each Mounting Location (With Aluminum Fins)
AGZBM/BB
Model
AGZ 075
AGZ 085
AGZ 090
AGZ 100
AGZ 110
AGZ 120
AGZ 130
Shipping Operating
Loc 1 Loc 2 Loc 3 Loc 4 Loc 5 Loc 6
Wt.
Wt.
TOTAL
(1) Add’l for
Copper Fins
217
lbs
5510
5630
1649
1166
1649
1166
-
-
5630
kg
2496
2550
747
528
747
528
-
-
2550
99
lbs
5670
5790
1734
1227
1657
1172
-
-
5790
217
kg
2569
2623
786
556
751
531
-
-
2623
99
lbs
5830
5950
1770
1205
1770
1205
-
-
5950
217
kg
2641
2695
802
546
802
546
-
-
2695
99
lbs
6820
6970
1323
1188
1053
1265
1135
1006
6970
289
kg
3089
3157
599
538
477
573
514
456
3157
131
lbs
7080
7230
1396
1205
1014
1396
1205
1014
7230
289
kg
lbs
kg
3207
7360
3334
3275
7480
3388
632
1477
669
546
1275
578
459
1073
486
632
1411
639
546
1218
552
459
1026
465
3275
7480
3388
131
289
131
lbs
7640
7760
1555
1293
1032
1555
1293
1032
7760
289
kg
3461
3515
704
586
467
704
586
467
3515
131
NOTE (1): Additional weight for copper coils is per mounting location.
Table 7, Isolator Kit Part Numbers
14
AGZ-BM Model
026 - 035
040 - 060
065
070
075 - 090
100, 110
120, 130
Spring Kit Part No.
330349601
330349602
330349603
330349604
330349608
330349610
330349611
R-I-S Kit Part No.
330349701
330349701
330349703
330349703
330349706
330349707
330349708
AGZ 026B through 130B
IMM AGZ-7
Table 8,AGZ BM/BB, Isolator Locations
ACZ-BS, AGZ-BM Less Evaporator Units
AGZBM/BB
Model
Operating
Weight
lbs
kg
Neoprene-In-Shear Mountings
Spring-Flex Mountings
1
2
3
4
5
6
3
4 (1)
026
3600
1631
Black
Gray
Gray
Green
-
-
Orange Purple
1
2
Red
Orange
5
6
030
3600
1631
Black
Gray
Gray
Green
-
-
Orange Purple
Red
Orange
035
-
-
3600
1631
Black
Gray
Gray
Green
-
-
Orange Purple
Red
Orange
-
-
040
3610
1635
Black
Gray
Gray
Green
-
-
Orange Purple
Purple Orange
-
-
045
3650
1653
Black
Gray
Gray
Green
-
-
Orange Purple
Purple Orange
-
-
050
3800
1721
Black
Gray
Gray
Green
-
-
Orange Purple
Purple Orange
-
-
055
3850
1744
Black
Gray
Gray
Green
-
-
Orange Purple
Purple Orange
-
-
060
4040
1830
Black
Gray
Gray
Green
-
-
Orange Purple
Purple Orange
-
-
065
4070
1844
Black
Black
Gray
Gray
-
-
Orange Purple
Purple
Red
-
-
070
4180
1894
Black
Black
Gray
Gray
-
-
Orange Orange Purple
Red
-
-
075
5630
2550
Red
Black
Red
Black
-
-
Green Orange Green Orange
-
-
085
5790
2623
Red
Black
Red
Black
-
-
Green Orange Green Orange
-
-
090
5950
2695
Red
Black
Red
Black
-
-
Green Orange Green Orange
-
-
100
6970
3157
Black
Black
Black
Black
Black
Black
Orange Orange Purple Orange Orange Purple
110
7230
3275
Black
Black
Black
Black
Black
Black
Orange Orange Purple Orange Orange Purple
120
7480
3388
Red
Black
Black
Red
Black
Black
Green Orange Purple
Green Orange Purple
130
7760
3515
Red
Black
Black
Red
Black
Black
Green Orange Purple
Green Orange Purple
NOTE (1): Position #4 is a CP-1, single spring isolator for ACZ 030 to 065 and AGZ 026 to 060. All
others are CP-2, two spring.
Ambient Air Temperature Limitations
Standard/High Ambient Panels
Models AGZ-B (26 to 130 tons, two circuit) have electrical data and subsequent field wiring
requirements that are tailored to individual applications.
There are many installations where the expected summer ambient air temperatures will be at
105°F (40.1°C) or less, resulting in smaller unit electrical requirements compared to operation at
106°F (41.1) and above. In these lower temperature cases, there can be considerable installation
cost savings by using smaller and more appropriate electrical service.
Therefore, the AGZ electrical data is divided into two classifications based on the design
ambient temperature where the unit will operate. Standard Ambient unit electrical data (BS and
BM models) is for operation in ambient temperatures of 105°F (40.1°C) or less. Units with the
High Ambient designation (BH and BB models) are for use above 105°F (40.1°C) to 125°F
(51.7°C).
The AGZ-B units for high ambient operation require the addition of the High Ambient Control
Panel Option, which includes the addition of a small fan with a filter in the air intake to cool the
control panel, and a unit nameplate that lists the larger electrical requirements.
All units with the optional VFD low ambient fan control automatically include the High
Ambient Control Panel Option. Operation of the VFD generates a quantity of panel heat best
removed by use of a control panel fan.
IMM AGZ-7
AGZ 026B through 130B
15
Winter Operation Temperatures
Fan Control
0°F to 34°F
35°F and Above
Optional VFD (1)
Standard FanTrol (2)
≤105°F
Standard
Ambient
Yes
>106°F
High
Ambient
Yes
≤105°F
Standard
Ambient
No
>106°F
High
Ambient
Yes
Packaged
BS
BH
BS
BH
Remote Evaporator
BM
BB
BM
BB
Design Ambient Air Temperature
Electrical Data (3)
Panel Fan Required (4)
Model Designator (5)
NOTES
1.
VFD is variable speed, fan control through the MicroTech Ii controller.
2.
FanTrol is fan cycling off discharge pressure.
3.
Standard Ambient electrical data begins on page 36, High Ambient data begins on page 46.
4.
The VFD option automatically includes the factory-installed panel fan and filter set
5.
The designator is the last two characters in the model number, i.e. AGZ 100BS.
Panel Ratings
Voltage
208-230
240
380-460
575
Standard
Standard
Optional
Panel
VFD
35
5
35
5
35
5
5
5
Options
High Short Circuit
High Interrupt Panel w/
Panel (kA)
Disconnect Swt. (kA)
120
120
100
100
65
65
25
25
Water Flow Limitations, Constant Flow
The evaporator flow rates and pressure drops shown on page 25 are for full load design
purposes. The maximum flow rate and pressure drop are based on a 6-degree
temperature drop. Avoid higher flow rates with resulting lower temperature drops to
prevent potential control problems resulting from very small control bands and limited
start up/shut off temperature changes.
The minimum flow and pressure drop is based on a full load evaporator temperature
drop of 16-degrees.
Evaporator flow rates below the minimum values can result in laminar flow causing
freeze-up problems, scaling and poor control. Flow rates above the maximum values
will result in unacceptable pressure drops and can cause excessive erosion, potentially
leading to failure.
Water Flow Limitations, Variable Flow
The full load, minimum flow limitation for constant flow is not to be confused with the
part load minimum flow rate that must be maintained for chillers operating in primary
variable flow pumping systems. As chiller capacity drops, the flow rate for this
pumping system will reduce proportionally. See the following table for the part load
minimum flow rates.
Other design practices for variable flow systems requiring a range of evaporator flow
rates can be found below.
16
AGZ 026B through 130B
IMM AGZ-7
These minimum flow rates assume that flow will be reduced proportionally to the
cooling load.
Table 9, Minimum Part Load Flow Rates
AGZ Model
010
013
017
020
025
029
034
026
030
035
040
045
Minimum Part
Load Flow (GPM)
10
13
15
20
22
27
33
26
29
32
37
41
AGZ Model
050
055
060
065
070
075
085
090
100
110
120
130
Minimum Part
Load Flow (GPM)
45
50
55
59
63
71
119
128
146
161
180
194
Variable Speed Pumping
Variable water flow involves changing the water flow through the evaporator as the
load changes. McQuay chillers are designed for this duty provided that the rate of
change in water flow is slow and the minimum and maximum flow rates for the vessel
are not exceeded.
The recommended maximum change in water flow is 10 percent of the change per
minute.
The water flow through the vessel must remain above the values listed on Table 9. If
flow drops below the minimum allowable, large reductions in heat transfer can occur.
Water Piping
Local authorities can supply the installer with the proper building and safety codes
required for safe and proper installation.
Install piping with minimum bends and changes in elevation to minimize pressure drop.
The following issues must be considered when designing and installing water piping:
1. Vibration eliminators to reduce vibration and noise transmission to the building.
2. Shutoff valves are required to isolate the unit from the piping during unit servicing.
3. Manual or automatic air vent valves at the high points of the system. Drains must
be installed at the lowest points in the system.
4. Adequate water pressure must be maintained (expansion tank or regulating valve).
5. Temperature and pressure indicators located at the unit are required to aid in unit
servicing.
6. A strainer or other means of removing foreign matter from the water before it
enters the pump must be installed. Place the strainer far enough upstream to
prevent cavitation at the pump inlet (consult pump manufacturer for
recommendations). The use of a strainer will prolong pump life and keep system
performance up.
7. Flush the system water piping thoroughly before making connections to the unit
evaporator. Be sure to install a strainer (40-mesh for models AGZ 010 through 070
and 20-mesh for AGZ 075 through 130) in the return water line before the inlet to
the chiller. Design the water piping so the chilled water circulating pump
discharges into the evaporator inlet.
8. The unit’s evaporator has a thermostat and heater to prevent freeze-up down to 20°F (-29°C). The heating cable can be wired to a separate 115V supply circuit.
As shipped from the factory, the heating cable is wired to the control circuit. All
water piping to the unit must also be protected to prevent freezing.
IMM AGZ-7
AGZ 026B through 130B
17
CAUTION
If separate disconnect is used for the 115V supply to the evaporator heating
cable, mark the disconnect clearly to ensure the disconnect is not accidentally
shut off during cold seasons causing a possible damaging evaporator freeze-up.
9. If the unit is used as a replacement chiller, flush the system thoroughly before unit
installation. Regular water analysis and chemical water treatment for the
evaporator loop is recommended immediately at equipment start-up.
10. The total water volume in the system should be sufficient to prevent frequent “onoff” cycling. Turnover rate should not be less than 4 minutes for normal variable
cooling loads.
11. When glycol is added to the water system for freeze protection, the refrigerant
suction pressure will be lower, cooling performance less, and water side pressure
drop greater. If the percentage of glycol is high, or if propylene is used instead of
ethylene glycol, the added pressure drop and loss of performance could be
substantial. When Glycol or Ice are selected as Unit Mode, the MicroTech II will
automatically reset the available range for the Leaving Water Temperature,
Freezestat and Evaporator Pressure settings.
12. Reset the freezestat setting to approximately 4 to 5 degrees F (2.3 to 2.8 degrees C)
below the leaving chilled water setpoint temperature. See the section titled
“Glycol Solutions” for additional information concerning glycol.
13. Perform a preliminary leak check before insulating the piping and filling the
system.
14. Piping insulation should include a vapor barrier to prevent condensation and
possible damage to the building structure.
Figure 16, AGZ 075 – AGZ 130, Typical Field Evaporator Water Piping
THERMOWELL
T
INLET
T
18
AGZ 026B through 130B
IMM AGZ-7
Figure 17, AGZ 026 - AGZ 070, Typical Field Evaporator Water Piping
T
Air
Vent
40-Mesh
Strainer
Inlet
P
Isolation
Valves
Vibration
Eliminators
Outlet
Flow
Switch
T
Thermowell
Drain
NOTE: Outdoor piping must be protected if freezing temperatures are a possibility.
Flow Switch
Mount a water flow switch in the leaving water line to shut down the unit when water
flow is interrupted. A flow switch is an equipment protection control and should never
be used to cycle a unit.
A “paddle” type flow switch is available from McQuay (part number 017503300).
Certain minimum flow rates are required to close the switch and are listed in Table 10
on page 19.
Installation should be as shown in Figure 18. Connect the normally open contacts of
the flow switch in the unit control center at terminals 44 and 61. There is also a set of
normally closed contacts on the switch that can be used for an indicator light or an
alarm to indicate when a “no flow” condition exists. Freeze protect any flow switch
that is installed outdoors. Manufacturer’s instructions included with the switch should
be followed.
NOTE: Differential pressure switches are not recommended for outdoor installation.
They can freeze and not indicate a no-flow condition.
Table 10, Flow Switch Minimum/Maximum Flow Rates
Nominal Pipe Size
Inches (mm)
2 (50.8)
2 1/2 (63.50
3 (76.20
4 (101.6)
5 (127.0)
6 (152.4)
Minimum Required Flow To
Activate Switch - gpm (l/m)
13.7 (51.8)
17.9 (67.8)
24.2 (91.6)
35.3 (134.0)
48.6 (184.0)
60.3 (228.0)
Maximum Safe Flow Rate
gpm (l/m)
105 (397.4)
149 (564.0)
230 (870.6)
397 (1502.7)
654 (2475.4)
900 (3406.5)
Note: See pressure drop table on page 21 for minimum and maximum flow through the evaporator.
Figure 18, Flow Switch Installation
Flow direction marked on switch
1" (25mm) NPT flow switch
connection
Tee
IMM AGZ-7
AGZ 026B through 130B
19
Water Connections
Bring water piping to the evaporator through the side between the vertical supports.
Provide taps for the connection of pressure gauges and thermometers in the inlet and
outlet lines. Check the inlet and outlet labels on the unit against the certified drawings
supplied on the job and be sure the water piping is hooked up correctly. Contact the
McQuay sales office if any discrepancies exist.
System Water Volume Considerations
All chillers need adequate time to recognize a load change, respond to the change and
stabilize without short cycling the compressor. The water volume in the system and the
size of the piping loop is a critical consideration. Good engineering practice is to have
a minimum water volume of four times the flow rate (GPM) for comfort cooling
applications. For process applications where the load can change quickly, contact the
local McQuay sales office for recommendations. A water storage tank (provided by
others) may be required to increase the system water volume in some systems.
Since there are many other factors that can influence performance, systems can
successfully operate below these suggestions. However, as the water volume decreases
below these suggestions, the possibility of problems increases. We believe that these
guidelines should be an industry standard and not just recommendations from McQuay.
Variable Speed Pumping
Variable water flow involves reducing the water flow through the evaporator as the
load decreases. McQuay chillers are designed for this duty provided that the rate of
change in water flow is not greater than 10 percent of the change per minute.
The water flow through the vessel must remain above the values shown on Table 9 on
page 17. If flow drops below the minimum allowable, large reductions in heat transfer
can occur.
Glycol Solutions
The use of a glycol/water mixture in the evaporator to prevent freezing will reduce
system capacity and efficiency, as well as increase pressure drop. The system capacity,
required glycol solution flow rate, and pressure drop with glycol may be calculated
using the following formulas and tables.
1. Capacity – Multiply the capacity based on water by the Capacity correction factor
from Table 11 through Table 14.
2. Flow – Multiply the water evaporator flow by the Flow correction factor from
Table 11 through Table 14 to determine the increased evaporator flow due to
glycol.
If the flow is unknown, it can be calculated from the following equation:
Glycol Flow (gpm) =
24 × Tons Capacity ( glycol )
× Flow Correction Factor )
Delta − T
For Metric Applications – Use the following equation for metric applications:
Glycol Flow (l/s) =
kW Capacity
× Flow Correction Factor
4.18 × Delta − T
3. Pressure drop -- Multiply the water pressure drop from page 25 by Pressure Drop
correction factor from Table 11 through Table 14. High concentrations of
propylene glycol at low temperatures may cause unacceptably high pressure drops.
4. Power -- Multiply the water system power by Power correction factor from Table
11 through Table 14.
20
AGZ 026B through 130B
IMM AGZ-7
Test coolant with a clean, accurate glycol solution hydrometer (similar to that found in
service stations) to determine the freezing point. Obtain percent glycol from the
freezing point table below. It is recommended that a minimum of 25% solution by
weight be used for protection against corrosion or that additional compatible inhibitors
be added.
Concentrations above 35 percent do not provide any additional burst protection and
should be carefully considered before using.
CAUTION
Do not use an automotive grade antifreeze. Industrial grade glycols must be
used. Automotive antifreeze contains inhibitors which will cause plating on the
copper tubes within the chiller evaporator. The type and handling of glycol used
must be consistent with local codes.
Table 11, Ethylene Glycol Factors for Models AGZ 026B to 070B
% E.G.
10
20
30
40
50
Freeze Point
o
F
26
18
7
-7
-28
o
C
-3.3
-7.8
-13.9
-21.7
-33.3
Capacity
Power
Flow
PD
0.998
0.993
0.987
0.980
0.973
0.998
0.997
0.995
0.992
0.991
1.036
1.060
1.092
1.132
1.182
1.097
1.226
1.369
1.557
1.791
Table 12, Propylene Glycol Factors for Models AGZ 026B to 070B
% P.G.
10
20
30
40
50
Freeze Point
o
F
26
19
9
-5
-27
o
C
-3.3
-7.2
-12.8
-20.6
-32.8
Capacity
Power
Flow
PD
0.995
0.987
0.978
0.964
0.952
0.997
0.995
0.992
0.987
0.983
1.016
1.032
1.057
1.092
1.140
1.100
1.211
1.380
1.703
2.251
Table 13, Ethylene Glycol Factors for Models AGZ 075B to 130B
% E.G.
10
20
30
40
50
Freeze Point
o
F
26
18
7
-7
-28
o
C
-3.3
-7.8
-13.9
-21.7
-33.3
Capacity
Power
Flow
PD
0.994
0.982
0.970
0.955
0.939
0.998
0.995
0.992
0.987
0.983
1.038
1.063
1.095
1.134
1.184
1.101
1.224
1.358
1.536
1.755
Table 14, Propylene Glycol Factors for Models AGZ 075B to 130B
% P.G.
10
20
30
40
50
IMM AGZ-7
Freeze Point
o
F
26
19
9
-5
-27
o
C
-3.3
-7.2
-12.8
-20.6
-32.8
Capacity
Power
Flow
PD
0.988
0.972
0.951
0.926
0.906
0.996
0.992
0.987
0.979
0.974
1.019
1.035
1.059
1.095
1.142
1.097
1.201
1.351
1.598
2.039
AGZ 026B through 130B
21
Altitude Correction Factors
Performance tables are based at sea level. Elevations other than sea level affect the performance of
the unit. The decreased air density will reduce condenser capacity consequently reducing the unit's
performance. For performance at elevations other than sea level, refer to Table 15 or Table 16.
Evaporator Temperature Drop Factors
Performance tables are based on a 10-degree F (5-degree C) temperature drop through the
evaporator. Adjustment factors for applications with temperature ranges from 6 to 16-degree F (3.3
to 8.9-degree C) are in Table 15 or Table 16.
Temperature drops outside this 6 to 16-degree F (3.3 to 8.9-degree C) range can affect the control
system's capability to maintain acceptable control and are not recommended.
The maximum water temperature that can be circulated through the evaporator in a non-operating
mode is 100°F (37.8°C).
Fouling Factor
Performance tables are based on water with a fouling factor of
2
2
0.0001 ft × hr × ° F / BTU or (0.0176m × °C / kW ) per ARI 550/590-98.
As fouling is increased, performance decreases. For performance at other than 0.0001 (0.0176)
fouling factor, refer to Table 15 or Table 16.
Foreign matter in the chilled water system will adversely affect the heat transfer capability of
the evaporator and could increase the pressure drop and reduce the water flow. Maintain
proper water treatment to provide optimum unit operation.
Table 15, Capacity and Power Derates, Models AGZ 026B to 070B
Altitude
Sea
Level
2000 feet
610 meters
4000 feet
1220 meters
6000 feet
1830 meters
22
Chilled Water
Delta T
Fouling Factor
0.0001 (0.0176)
0.00025 (0.044)
0.00075 (0.132)
0.00175 (0.308)
°F
°C
Cap.
Power
Cap.
Power
Cap.
Power
Cap.
Power
6
3.3
0.978
0.993
0.975
0.991
0.963
0.987
0.940
0.980
8
4.4
0.989
0.996
0.986
0.994
0.973
0.990
0.950
0.983
10
5.6
1.000
1.000
0.996
0.999
0.984
0.994
0.961
0.987
12
6.7
1.009
1.003
1.005
1.001
0.993
0.997
0.969
0.990
14
7.7
1.018
1.004
1.014
1.003
1.002
0.999
0.978
0.991
16
8.9
1.025
1.007
1.021
1.006
1.009
1.001
0.985
0.994
6
3.3
0.977
1.001
0.973
1.000
0.961
0.996
0.938
0.989
8
4.4
0.987
1.006
0.984
1.004
0.971
1.000
0.948
0.993
10
5.6
0.998
1.009
0.995
1.007
0.982
1.003
0.959
0.996
12
6.7
1.007
1.011
1.004
1.010
0.991
1.006
0.967
0.998
14
7.7
1.014
1.014
1.011
1.013
0.998
1.009
0.974
1.001
16
8.9
1.022
1.016
1.018
1.014
1.005
1.010
0.981
1.003
6
3.3
0.973
1.011
0.970
1.010
0.957
1.006
0.935
0.998
8
4.4
0.984
1.014
0.980
1.013
0.968
1.009
0.945
1.001
10
5.6
0.995
1.019
0.991
1.017
0.979
1.013
0.955
1.005
12
6.7
1.004
1.021
1.000
1.020
0.987
1.016
0.964
1.008
14
7.7
1.011
1.024
1.007
1.023
0.994
1.018
0.971
1.011
16
8.9
1.018
1.027
1.014
1.026
1.002
1.021
0.978
1.014
6
3.3
0.969
1.021
0.966
1.020
0.954
1.016
0.931
1.008
8
4.4
0.980
1.026
0.977
1.024
0.964
1.020
0.942
1.013
10
5.6
0.989
1.029
0.986
1.027
0.973
1.023
0.950
1.015
12
6.7
0.998
1.033
0.995
1.031
0.982
1.027
0.959
1.020
14
7.7
1.007
1.036
1.004
1.034
0.991
1.030
0.967
1.022
16
8.9
1.014
1.037
1.011
1.036
0.998
1.031
0.974
1.024
AGZ 026B through 130B
IMM AGZ-7
Table 16, Capacity and Power Derates, Models AGZ 075B to 130B
Altitude
Sea
Level
2000 feet
610 meters
4000 feet
1220 meters
6000 feet
1830 meters
Chilled Water
Delta T
°F
6
8
10
12
14
16
6
8
10
12
14
16
6
8
10
12
14
16
6
8
10
12
14
16
°C
3.3
4.4
5.6
6.7
7.7
8.9
3.3
4.4
5.6
6.7
7.7
8.9
3.3
4.4
5.6
6.7
6.8
8.9
3.3
4.4
5.6
6.7
7.7
8.9
0.0001 (0.0176)
Cap.
Power
0.990
0.997
0.994
0.998
1.000
1.000
1.005
1.001
1.009
1.002
1.013
1.004
0.987
1.005
0.992
1.006
0.997
1.008
1.002
1.009
1.007
1.011
1.011
1.012
0.985
1.014
0.991
1.015
0.995
1.016
1.000
1.018
1.005
1.019
1.009
1.021
0.982
1.023
0.988
1.025
0.992
1.026
0.997
1.028
1.002
1.029
1.006
1.031
Fouling Factor
0.00025 (0.044)
0.00075 (0.132)
Cap.
Power
Cap.
Power
0.976
0.994
0.937
0.983
0.981
0.995
0.942
0.984
0.987
0.996
0.947
0.986
0.991
0.997
0.951
0.986
0.995
0.998
0.955
0.987
1.000
1.000
0.960
0.989
0.974
1.002
0.934
0.991
0.979
1.003
0.940
0.992
0.984
1.004
0.944
0.994
0.989
1.005
0.949
0.994
0.993
1.007
0.953
0.996
0.998
1.008
0.958
0.997
0.972
1.010
0.933
0.999
0.977
1.012
0.938
1.001
0.982
1.013
0.943
1.002
0.987
1.014
0.947
1.003
0.991
1.015
0.951
1.004
0.995
1.017
0.955
1.006
0.969
1.020
0.930
1.009
0.975
1.022
0.935
1.010
0.979
1.022
0.940
1.011
0.984
1.024
0.944
1.013
0.989
1.025
0.949
1.014
0.992
1.027
0.952
1.016
0.00175 (0.308)
Cap.
Power
0.868
0.964
0.872
0.965
0.877
0.967
0.881
0.968
0.884
0.968
0.889
0.970
0.865
0.972
0.870
0.973
0.875
0.975
0.879
0.975
0.883
0.977
0.887
0.978
0.864
0.980
0.869
0.981
0.873
0.982
0.877
0.984
0.881
0.985
0.884
0.987
0.861
0.989
0.866
0.991
0.870
0.992
0.875
0.994
0.879
0.995
0.882
0.996
Evaporator Freeze Protection
Evaporator freeze-up can be a concern in the application of air-cooled water chillers. To
protect against freeze-up, insulation and an electric heater cable are furnished with the unit.
This protects the evaporator down to -20°F (-29°C) ambient air temperature. Although the
evaporator is equipped with freeze protection, it does not protect water piping external to the
unit or the evaporator itself if there is a power failure or heater cable burnout. Consider the
following recommendations for additional protection.
1. If the unit will not be operated during the winter, drain evaporator and chilled water piping
and flush with glycol. Drain and vent connections are provided on the evaporator to ease
draining.
2. Add a glycol solution to the chilled water system to provide freeze protection. Freeze
point should be approximately ten degrees below minimum design ambient temperature.
3. The addition of thermostatically controlled heat and insulation to exposed piping.
4. Continuous circulation of water through the chilled water piping and evaporator.
The evaporator heater cable is factory wired to the 115-volt circuit in the control box. This power
should be supplied from a separate source, but it can be supplied from the control circuit.
Operation of the heater cable is automatic through the ambient sensing thermostat that energizes
the evaporator heater cable for protection against freeze-up. Unless the evaporator is drained in the
winter, the disconnect switch to the evaporator heater must not be open.
IMM AGZ-7
AGZ 026B through 130B
23
Operating/Standby Limits
Maximum standby ambient air temperature, 130°F (55°C)
Maximum operating ambient air temperature
Standard Ambient Unit, 105°F (40.6°C) and below, Models BS and BM
High Ambient Unit, above 105°F (40.6°C) to 125°F 51.7°C), Models BH and BB
Minimum operating ambient temperature (standard), 35°F (2°C)
Minimum operating temperature (with optional low-ambient control), 0°F (-18°C)
Leaving chilled water temperature, 40°F to 60°F (4.4°C to 15.6°C)
Leaving chilled fluid temperatures (with anti-freeze), 20°F to 60°F (-7°C to 16°C)
Design chilled water Delta-T range, 6 degrees F to 16 degrees F (3.3 degrees C to 8.9
degrees C)
Part load minimum flow for variable flow systems; varies with unit size, see below
Maximum operating inlet fluid temperature, 76°F (24°C)
Maximum non-operating inlet fluid temperature, 100°F (38°C)
Electric power supply, see page 52
Evaporator Flow and Pressure Drop Water Flow
Limitations
The evaporator flow rates and pressure drops shown on page 25 are for full load,
constant flow design purposes.
See the page 16 for the part load minimum flow rates. Other design practices for
variable flow systems requiring a range of evaporator flow rates can be found on page
20.
24
AGZ 026B through 130B
IMM AGZ-7
Figure 19, AGZ 026B – 130B, Evaporator Pressure Drop
075-085-090
120-130
026-030
035
040
050
045
AGZ Unit
Model
026B
030B
035B
040B
045B
050B
055B
060B
065B
070B
075B
085B
090B
100B
110B
120B
130B
060
100-110
065-070
055
Minimum
Inch-Pound
S.I.
gpm
DP ft.
lps DP kpa
41
1.6
2.6
4.7
45
1.9
2.9
5.7
50
1.9
3.1
5.6
58
1.9
3.6
5.7
64
1.8
4.0
5.4
71
1.8
4.4
5.4
78
1.8
4.9
5.3
86
1.7
5.4
5.2
92
1.6
5.8
4.9
98
1.9
6.2
5.6
111
5.6
7.0
16.5
119
6.3
7.5
18.9
128
7.2
8.1
21.4
146
2.6
9.2
7.7
161
3.1
10.2
9.2
180
3.5
11.3
10.4
194
4.1
12.2
12.1
Nominal
Inch-Pound
S.I.
gpm
DP ft.
lps
DP kpa
65
3.9
4.1
11.6
72
4.7
4.6
14.1
80
4.6
5.0
13.8
92
4.7
5.8
14.0
102
4.5
6.4
13.4
113
4.5
7.1
13.3
125
4.4
7.9
13.0
137
4.3
8.6
12.8
147
4.1
9.3
12.1
157
4.6
9.9
13.7
177
12.5
11.2
37.4
191
14.3
12.1
42.7
205
16.2
12.9
48.4
234
6.1
14.8
18.2
258
7.3
16.3
21.7
288
8.9
18.1
26.5
311
10.4
19.6
30.9
Maximum
Inch-Pound
S.I.
gpm
DP ft.
lps DP kpa
109
10.4
6.9
30.9
121
12.7
7.6
37.8
133
12.4
8.4
36.9
154
12.6
9.7
37.5
170
12.1
10.7
35.9
188
12.0
11.9
35.7
209
11.7
13.2
34.8
228
11.5
14.4
34.2
246
10.9
15.5
32.5
262
12.3
16.5
36.8
295
30.4
18.6
90.7
318
34.8
20.1 103.6
342
39.4
21.6 117.3
390
15.5
24.6
46.2
430
18.5
27.1
55.1
479
24.6
30.2
73.4
518
28.7
32.7
85.6
NOTE: Minimum and maximum flows provide a Delta-T for each unit size within a 6 - 16°F range for proper control.
IMM AGZ-7
AGZ 026B through 130B
25
Wind Baffles and Hail Guards
Protection against negative effects from wind and protection against fin damage from hail
can be achieved from two separate options from McQuay. Factory or field installed louvers
are available as well as the box-type enclosures described below.
Wind Baffles/Hail Guards are a field installed option that are used to stabilize unit operation
in high wind areas and to assist in operation at low ambient temperatures. Figure 20 is a
sketch of a typical panel assembly on an AGZ unit. The actual number of panels and parts
will vary by model size. The parts are shown in the table below and referenced by balloon
numbers.
Figure 20, Installation Sequence
Rib Attachment (First)
RIB FLANGES ON THE END
MUST POINT TO CENTER
OF COIL TO HAVE A FINISHED
LOOK. INTERIOR RIB FLANGES
CAN POINT IN ANY DIRECTION.
UNIT VERTICAL COIL
ATTACH ALL RIBS TO
COIL VERTICAL CHANNELS.
Front Panel Attachment (Second)
PLACE FRONT "A" AND
FASTEN TO BOTH SIDES
E
UNIT VERTICAL COIL
D
C
B
2
PLACE FRONT "B" BY LAPPING
OVER "A" AND REPEAT
ATTACHMENT PROCEDURE.
A
1
3
Top Panel Attachment (Last)
E
ATTACH TOP "A" AT HORIZONTAL COIL CHANNEL FIRST.
THIS WILL SQUARE THE PANEL.
OVERLAP THE FRONT PANEL FLANGE.
UNIT VERTICAL COIL
D
C
B
A
ATTACH LEFT SIDE SECOND.
LAP PANEL "B" OVER PANEL "A"
AND REPEAT ATTACHMENT PROCEDURE.
26
AGZ 026B through 130B
IMM AGZ-7
Table 17, Packing List
Description
Vertical Support Rib
Top Cover
Front Panel
¼ - 20 x ½” Screw (Place in Poly Bag)
Part Number
074758501
330409401
330409501
046093807
Bubble Number
1
2
3
Figure 21, Components
TOP
REAR (AGAINST UNIT)
VERTICAL SUPPORT RIB
TOP COVER
FRONT PANEL
Top Panel, Install Last
Overlap the Front panel
Front Panel, Install Second
Rib, Install First
IMM AGZ-7
AGZ 026B through 130B
27
Optional Features
Controls
Hot Gas Bypass
Hot gas bypass permits unit operation down to 10% of full load capacity. This option
includes a factory-mounted hot gas bypass valve, solenoid valve, and manual shutoff
valve for each circuit. See page 61 for further information.
Head Pressure Control
Optional fan VFD control allows unit operation down to 0°F (-18°C). (Not available
on 380 volt, 60 Hertz units.)
Water Flow Switch
(P/N 017503300) A water flow switch is available for field installation in the chilled
water piping to avoid evaporator freeze-up under low or no flow conditions. Terminals
are provided in the unit control center for field hook-up of the water flow switch. If
this option is not ordered with the unit, then a field supplied water flow switch must be
installed.
Alarm Bell
Bell for field installation and wiring to the control panel to provide remote indication
of unit alarm condition. See Field Wiring Diagram for connection locations.
BAS Interface
Optional Protocol Selectability™, connection to the chiller for all building automation
systems (BAS) protocols will be at the unit controller. An interface module, depending
on the protocol being used, may have been factory-installed in the unit controller (or it
can be field installed).
Protocols Supported
Table 18, Standard Protocol Data
Protocol
Physical Layer
Data Rate
Controller
Other
BACnet®/IP or
BACnet/Ethernet
Ethernet 10 Base-T
10 Megabits/sec
MicroTech II
Reference ED 15062
BACnet MSTP
LONWORKS
®
Modbus RTU
RS-485
FTT-10A
RS-485 or RS-232
9600, 19200 or
38400 bits/sec
78kbits/sec
9600 or 19200
bits/sec
MicroTech II
Reference ED 15062
MicroTech II
Reference ED 15062
MicroTech II
Reference ED 15063
The interface kits on the MicroTech II controller are as follows:
• BACnet Kit P/N 350147404: BACnet/IP, BACnet MS/TP, or BACnet Ethernet
• LONWORKS Kit P/N 350147401: LonTalk (FTT-10A)
• Modbus: Modbus RTU
Optional Protocol Selectability BAS interfaces. The locations and interconnection
requirements for the various standard protocols are found in their respective
installation manuals.
Modbus IM 743
LONWORKS IM 735
BACnet IM 736
Referenced documents may be obtained from the local McQuay sales office, from the
local McQuayService office, or from the McQuay Technical Response Center, located
in Staunton, Virginia (540-248-0711).
28
AGZ 026B through 130B
IMM AGZ-7
These documents can also be found on www.mcquay.com under Product Information >
(chiller type) > Control Integration.
®™ The following are trademarks or registered trademarks of their respective
companies: BACnet from the American Society of Heating, Refrigerating and AirConditioning Engineers, Inc., LonTalk, LONMARK and LONWORKS from Echelon
Corporation, and Modbus and Modbus RTU from Schneider Electric.
Remote Operator Interface Panel
The box containing the optional remote interface panel will have installation
instructions, IOM- MT II Remote, in it. The manual is also available for downloading
from www.mcquay.com.
Unit
Vibration Isolators
Spring or rubber-in-shear vibration isolators are available for field installation to
reduce vibration transmission through the unit base. See page 12 for detailed
information on their installation.
Protective Base Guards
Optional factory-installed, vinyl-coated welded wire base guards provide all-around
lower unit protection on ground level installations. Coil guards are standard.
Copper Fin Condenser Coils
Copper fin condenser coils are available as an option on all models.
Black Fin Coils
Aluminum fin stock precoated with a phenolic coating with 1000 hour salt spray
resistance (ASTM B117-90).
Coated Fins
Copper or aluminum fins coated with ElectroFin® baked epoxy protective coating with
3000+ hour salt spray resistance (ASTM B117-90).
Evaporator Insulation
Double insulation thickness (total of 1½ inches) for high humidity areas or low fluid
temperatures.
Sound Reduction
Acoustical blankets are factory-installed on each compressor.
Hail and Wind Guards
A field-mounted option that is shipped as a kit including panels, fasteners, and
instructions. See page 26 for further information.
Louvers
Upper and/or lower, factory mounted or field installed louver panels that protect from
hail damage, help stabilize operation in high wind conditions and provide a uniform,
enhanced appearance.
Shut-off Valves
Factory-mounted suction and discharge shut-off valves, liquid line shutoff valve is
standard.
IMM AGZ-7
AGZ 026B through 130B
29
Electrical
Multi-Point Electrical Connection
Provides a power connection to each of the unit’s two electrical circuits.
Disconnect Switch with Through-the-Door Handle
A factory or field-installed option for service use, nonfused disconnect switch
(mounted inside the power section of the control box) with a through-the-door handle
is available with single and multi-point power supply.
Phase Loss/Voltage Protection
Phase loss with under/over voltage protection and multiple LED indication of fault
type is available as a factory-installed option to guard against compressor motor
burnout.
Convenience Outlet
10.0 amp, 115-volt outlet located in control panel to provide power for servicing unit.
Ground Fault Protection
Protects equipment from damage from line-to-ground fault currents less than those
required for conductor protection.
High Short Circuit Current Protection
Provides control panel protection against short circuit currents per the following table:
Voltage
208
240
460
600
Current (kA)
120
100
65
25
High Ambient Control Panel
Consists of exhaust fan with rain hood, two inlet screens with filters, necessary
controls and wiring to allow operation to 125°F. The option can be factory or field
installed as a kit.:
• It is automatically included on any unit with the fan VFD (low ambient option)
• It is required on any unit operating above 105°F (40.1°C).
30
AGZ 026B through 130B
IMM AGZ-7
Physical Data
AGZ-BS/BH
Table 19, AGZ 026BS/BH through 035BS/BH
PHYSICAL DATA
026B
BASIC DATA
Unit Capacity @ ARI (1), Tons (kW)
Number Of Refrigerant Circuits
Unit Operating Charge, R-22, Lbs.
Unit Operating Charge, R-22, (kg)
Cabinet Dimensions, LxWxH, In.
Cabinet Dimensions, LxWxH, (mm)
Unit Operating Weight, Lb (kg)
Unit Shipping Weight, Lb (kg)
Add'l Weight If Copper Finned Coils, Lb (kg)
AGZ MODEL NUMBER
030B
035B
Ckt.1
Ckt.2
Ckt.1
Ckt.2
Ckt.1
Ckt.2
27.2 (95.4)
30.2 (106.3)
33.2 (117.2)
2
2
2
22
22
22
27
27
27
10
10
10
12
12
12
94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4
2398 x 2235 x 2550 2398 x 2235 x 2550 2398 x 2235 x 2550
3990 (1811)
4040 (1834)
4080 (1852)
39501793)
3990 (1811)
4030 (1830)
284 (129)
284 (129)
284 (129)
COMPRESSORS
Type
Nominal tonnage of each Compressor
Number Of Compressors per Circuit
Oil Charge Per Compressor, Oz.
Oil Charge Per Compressor, (g)
Tandem Scrolls
7.5
7.5
2
2
140
140
(496)
(496)
Tandem Scrolls
7.5
9.0
2
2
140
140
(496)
(496)
Tandem Scrolls
9.0
9.0
2
2
140
140
(496)
(496)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Staging, 4 Stages, Circuit #1 in Lead
Staging, 4 Stages, Circuit #2 in Lead
0-25-50-75-100
0-25-50-75-100
0-23-50-73-100
0-27-50-77-100
0-25-50-75-100
0-25-50-75-100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area Sq. Ft.
Coil Face Area, (M2)
Finned Height x Finned Length, In.
26.3
26.3
2.4
2.4
50x75.6 50x75.6
1270 x
1270 x
Finned Height x Finned Length, (mm)
1920
1920
Fins Per Inch x Rows Deep
16 x 3
16 x 3
Pumpdown Capacity, 90% Full Lbs. (kg)
49 (22)
49 (22)
Maximum Relief Valve Pressure Setting,
450
450
psig (kPa)
(3103)
(3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm)
Number Of Motors - HP (kW) (2)
Fan And Motor RPM, 60Hz
60 Hz Fan Tip Speed, FPM (M/Sec)
60 Hz Total Unit Airflow, CFM (M3/sec)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
24,316 (11,478)
26.3
2.4
50x75.6
1270 x
1920
16 x 3
49 (22)
450
(3103)
26.3
26.3
2.4
2.4
50x75.6 50x75.6
1270 x 1270 x
1920
1920
16 x 3
16 x 3
49 (22) 49 (22)
450
450
(3103)
(3103)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
24,316 (11,478)
26.3
2.4
50x75.6
1270 x
1920
16 x 3
49 (22)
450
(3103)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
24,316 (11,478)
EVAPORATOR - BRAZED PLATE-TO-PLATE
Number of Evaporators
1
1
Number of Refrigerant Circuits
2
2
Water Volume, Gallons, (L)
4.3 (16.4)
5.0 (18.9)
Maximum Water Pressure, psig (kPa)
363 (2503)
363 (2503)
Max. Refrig. Working Pressure, psig (kPa)
450 (3102)
450 (3102)
Water Inlet / Outlet Victaulic Conn. In. (mm)
3 (76)
3 (76)
Drain - NPT int, In. (mm)
Field
Field
Vent - NPT int, In. (mm)
Field
Field
NOTES:
1. Nominal capacity based on 95°F ambient air and 54°F/44°F water range.
2. Except for 380V/60 & 575V/60, HP = 2.0
IMM AGZ-7
AGZ 026B through 130B
1
2
5.7 (21.4)
363 (2503)
450 (3102)
3 (76)
Field
Field
31
Table 20, AGZ 040BS/BH through 055BS/BH
PHYSICAL DATA
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW)
Number Of Refrigerant Circuits
Unit Operating Charge, R-22, lbs.
Unit Operating Charge, R-22, (kg)
Cabinet Dimensions, LxWxH, in.
Cabinet Dimensions, LxWxH, (mm)
Unit Operating Weight, Lbs. (kg)
Unit Shipping Weight, Lbs. (kg)
Add'l Weight If Copper Finned Coils, lbs. (kg)
AGZ MODEL NUMBER
045B
050B
040B
055B
Ckt.1
Ckt.1
Ckt.2
Ckt.1
Ckt.2
Ckt.1
Ckt.2
Ckt.2
38.5 (135.5)
42.5 (149.6)
47.0 (165.4)
52.2 (183.7)
2
2
2
2
31
31
38
38
38
38
46
46
(14)
(14)
(17)
(17)
(17)
(17)
(21)
(21)
94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4
2398 x 2235 x
2398 x 2235 x
2398 x 2235 x
2398 x 2235 x
2550
2550
2550
2550
4130 (1875)
4270 (1939)
4400 (1998)
4540 (2061)
4070 (1848)
4210 (1911)
4330 (1966)
4460 (2025)
288 (130)
288 (130)
476 (216)
476 (216)
COMPRESSORS
Type
Nominal tonnage of each Compressor
Number Of Compressors per Circuit
Oil Charge Per Compressor, oz.
Oil Charge Per Compressor, (g)
Tandem Scrolls
10.0
10.0
2
2
140
140
(496)
(496)
Tandem Scrolls
10.0
13.0
2
2
140
140
(496)
(496)
Tandem Scrolls
13.0
13.0
2
2
140
140
(496)
(496)
Tandem Scrolls
13.0
15.0
2
2
140
140
(496)
(496)
0-25-50-75-100
0-25-50-75-100
0-25-50-75-100
0-25-50-75-100
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Staging, 4 Stages, Circuit #1 in Lead
Staging, 4 Stages, Circuit #2 in Lead
0-25-50-75-100
0-25-50-75-100
0-22-50-46-100
0-28-50-85-100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, sq. ft.
Coil Face Area , sq. m
Finned Height x Finned Length, in.
44.1
4.1
42x75.6
1067 x
Finned Height x Finned Length, (mm)
1920
Fins Per Inch x Rows Deep
16 x 2
Pumpdown Capacity, 90% Full Lbs. (kg)
60 (27)
450
Maximum Relief Valve Pressure Setting, psig (kPa)
(3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, in. (mm)
Number Of Motors - HP (kW) (2)
Fan And Motor RPM, 60Hz
60 Hz Fan Tip Speed, FPM (m/sec)
60 Hz Total Unit Airflow, CFM (m3/sec)
44.1
44.1
44.1
4.1
4.1
4.1
42x75.6 42x75.6 42x75.6
1067 x 1067 x 1067 x
1920
1920
1920
16 x 2
16 x 2
16 x 2
60 (27) 60(27)
60(27)
450
450
450
(3103)
(3103)
(3103)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
39,600 (18,692)
44.1
4.1
42x75.6
1067 x
1920
16 x 3
82 (37)
450
(3103)
44.1
44.1
44.1
4.1
4.1
4.1
42x75.6 42x75.6 42x75.6
1067 x 1067 x 1067 x
1920
1920
1920
16 x 3
16 x 3
16 x 3
82 (37) 82 (37) 82 (37)
450
450
450
(3103)
(3103)
(3103)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
39,600 (18,692)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
39,600 (18,692)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
39,600 (18,692)
1
2
7.2 (27.3)
363 (2503)
450 (3102)
3 (76)
Field
Field
1
2
8.1 (30.7)
363 (2503)
450 (3102)
3 (76)
Field
Field
1
2
9.2 (34.9)
363 (2503)
450 (3102)
3 (76)
Field
Field
EVAPORATOR - BRAZED PLATE-TO-PLATE
Number of Evaporators
1
Number of Refrigerant Circuits
2
Water Volume, Gallons, (L)
6.3 (23.9)
Maximum Water Pressure, psig (kPa)
363 (2503)
Maximum Refrigerant Working Pressure, psig (kPa)
450 (3102)
Water Inlet / Outlet Victaulic Connections, in. (mm)
3 (76)
Drain - NPT int, in. (mm)
Field
Vent - NPT int, in. (mm)
Field
NOTES
1. Nominal capacity based on 95°F ambient air and 54°F/44°F water range.
2. Except for 380V/60 & 575V/60, HP = 2.0
32
AGZ 026B through 130B
IMM AGZ-7
Table 21, AGZ 060BS/BH through 070BS/BH
PHYSICAL DATA
060B
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW)
Number Of Refrigerant Circuits
Unit Operating Charge, R-22, lbs.
Unit Operating Charge, R-22, (kg)
Cabinet Dimensions, LxWxH, in.
Cabinet Dimensions, LxWxH, (mm)
Unit Operating Weight, Lbs. (kg)
Unit Shipping Weight, Lbs. (kg)
Add'l Weight If Copper Finned Coils, lbs. (kg)
AGZ MODEL NUMBER
065B
070B
Ckt.1
Ckt.2
Ckt.1
Ckt.2
Ckt.1
Ckt.2
57.1 (201.0)
61.4 (215.5)
65.5 (230.0)
2
2
2
46
46
52
59
59
59
(21)
(21)
(24)
(27)
(27)
(27)
94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4 94.4 x 88.0 x 100.4
2398 x 2235 x
2398 x 2235 x
2398 x 2235 x
2550
2550
2550
4600
4860
4990
4520
4760
4890
476 (216)
568 (258)
568 (258)
COMPRESSORS
Type
Nominal tonnage of each Compressor
Number Of Compressors per Circuit
Oil Charge Per Compressor, oz.
Oil Charge Per Compressor, (g)
Tandem Scrolls
15.0
15.0
2
2
140
140
(496)
(496)
Tandem Scrolls
Tandem Scrolls
15.0
15 / 20 15 / 20 15 / 20
2
2
2
2
140
140 /148 140 /148 140 /148
(496) 496/ 525 496/ 525 496/ 525
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Staging, 4 Stages, Circuit #1 in Lead
Staging, 4 Stages, Circuit #2 in Lead
0-25-50-75-100
0-25-50-75-100
0-23-46-77-100
0-31-46-69-100
0-25-50-75-100
0-25-50-75-100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, sq. ft.
Coil Face Area, (m2)
Finned Height x Finned Length, in.
44.1
4.1
42x75.6
1067 x
Finned Height x Finned Length, (mm)
1920
Fins Per Inch x Rows Deep
16 x 3
Pumpdown Capacity, 90% Full Lbs. (kg)
82 (37)
450
Maximum Relief Valve Pressure Setting, psig (kPa)
(3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, in. (mm)
Number Of Motors - HP (kW) (2)
Fan And Motor RPM, 60Hz
60 Hz Fan Tip Speed, FPM (m/sec)
60 Hz Total Unit Airflow, CFM (m3/sec)
44.1
52.6
52.6
52.6
52.6
4.1
4.9
4.9
4.9
4.9
42x75.6 50x75.6 50x75.6 50x75.6 50x75.6
1067 x 1270 x 1270 x 1270 x 1270 x
1920
1920
1920
1920
1920
16 x 3
16 x 3
16 x 3
16 x 3
16 x 3
82 (37) 98 (44) 98 (44) 98 (44) 98 (44)
450
450
450
450
450
(3103)
(3103)
(3103)
(3103)
(3103)
4 – 30 (762)
4 – 1.5
1140
8950 (4224)
37,228 (17,572
4 – 30 (762)
4 – 2.0
1140
8950 (4224)
43,452 (20,510)
4 – 30 (762)
4 – 2.0
1140
8950 (4224)
43,452 (20,510)
1
2
11.2 (42.5)
363 (2503)
450 (3102)
3 (76)
Field
Field
1
2
11.2 (42.5)
363 (2503)
450 (3102)
3 (76)
Field
Field
EVAPORATOR - BRAZED PLATE-TO-PLATE
Number of Evaporators
1
Number of Refrigerant Circuits
2
Water Volume, Gallons, (L)
9.2 (34.9)
Maximum Water Pressure, psig (kPa)
363 (2503)
Maximum Refrigerant Working Pressure, psig (kPa)
450 (3102)
Water Inlet / Outlet Victaulic Connections, in. (mm)
3 (76)
Drain - NPT int, in. (mm)
Field
Vent - NPT int, in. (mm)
Field
NOTES
1.
Nominal capacity based on 95°F ambient air and 54°F/44°F water range.
2.
Except for 380V/60 & 575V/60 for AGZ 060, HP = 2.0
IMM AGZ-7
AGZ 026B through 130B
33
Table 22, AGZ 075BS/BH through 090BS/BH
PHYSICAL DATA
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW)
Number Of Refrigerant Circuits
Unit Operating Charge, R-22, lbs.
Unit Operating Charge, R-22, (kg)
Cabinet Dimensions, LxWxH, in.
Cabinet Dimensions, LxWxH, (mm)
Unit Operating Weight, Lbs. (kg)
Unit Shipping Weight, Lbs. (kg)
Add'l Weight If Copper Finned Coils, lbs. (kg)
075B
AGZ MODEL NUMBER
085B
090B
Ckt.1
Ckt.2
73.7 (259.4)
2
59
59
(27)
(27)
134.9 x 88.0 x 100.4
3426 x 2235 x 2550
6530 (2958)
6320 (2863)
870 (395)
Ckt.1
Ckt.2
79.6 (280.2)
2
59
69
(27
(31)
134.9 x 88.0 x 100.4
3426 x 2235 x 2550
6690 (3031)
6480 (2935)
870 (395)
Ckt.1
Ckt.2
85.5 (301.0)
2
69
69
(31)
(31)
134.9 x 88.0 x 100.4
3426 x 2235 x 2550
6850 (3103)
6640 (3008)
870 (395)
Tandem Scrolls
20.0
20.0
2
2
148
148
(525)
(525)
Tandem Scrolls
20.0
25.0
2
2
148
200
(525)
(709)
Tandem Scrolls
25.0
25.0
2
2
200
200
(709)
(709)
COMPRESSORS
Type
Nominal tonnage of each Compressor
Number Of Compressors per Circuit
Oil Charge Per Compressor, oz.
Oil Charge Per Compressor, (g)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Staging, 4 Stages, Circuit #1 in Lead
Staging, 4 Stages, Circuit #2 in Lead
0-25-50-75-100
0-25-50-75-100
0-22-50-72-100
0-28-50-78-100
0-25-50-75-100
0-25-50-75-100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, sq. ft.
Coil Face Area, (m2)
Finned Height x Finned Length, in.
78.8
78.8
78.8
78.8
78.8
78.8
7.3
7.3
7.3
7.3
7.3
7.3
50 x113.4 50 x113.4 50 x113.4 50 x113.4 50 x113.4 50 x113.4
1270 x
1270 x
1270 x
1270 x
1270 x
1270 x
Finned Height x Finned Length, (mm)
2880
2880
2880
2880
2880
2880
Fins Per Inch x Rows Deep
16 x 3
16 x 3
16 x 3
16 x 3
16 x 3
16 x 3
Pumpdown Capacity, 90% Full Lbs. (kg)
147 (67) 147 (67) 147 (67) 147 (67) 147 (67) 147 (67)
450
450
450
450
450
450
Maximum Relief Valve Pressure Setting, psig (kPa)
(3103)
(3103)
(3103)
(3103)
(3103)
(3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, in. (mm)
Number Of Motors - HP (kW)
Fan And Motor RPM, 60Hz
60 Hz Fan Tip Speed, FPM (m/sec)
60 Hz Total Unit Airflow, CFM (m3/sec)
6 – 30 (762)
6 – 2.0
1140
8950 (4224)
65,178 (30,765)
6 – 30 (762)
6 – 2.0
1140
8950 (4224)
65,178 (30,765)
6 – 30 (762)
6 – 2.0
1140
8950 (4224)
65,178 (30,765)
1
2
14.0 x 5.2
356 x 1585
25 (95)
152 (1047)
300 (2066)
5 (127)
0.5 (12.7)
0.5 (12.7)
1
2
14.0 x 5.2
356 x 1585
25 (95)
152 (1047)
300 (2066)
5 (127)
0.5 (12.7)
0.5 (12.7)
EVAPORATOR - SHELL AND TUBE
Number of Evaporators
1
Number of Refrigerant Circuits
2
Diameter, in. - Length, ft.
14.0 x 5.2
Diameter, (mm) – Length, (mm)
356 x 1585
Water Volume, Gallons, (L)
25 (95)
Maximum Water Pressure, psig (kPa)
152 (1047)
Maximum Refrigerant Working Pressure, psig (kPa)
300 (2066)
Water Inlet / Outlet Victaulic Connections, in. (mm)
5 (127)
Drain - NPT int, in. (mm)
0.5 (12.7)
Vent - NPT int, in. (mm)
0.5 (12.7)
NOTE:
1. Nominal capacity based on 95°F ambient air and 54°F/44°F water range.
34
AGZ 026B through 130B
IMM AGZ-7
Table 5, AGZ 100BS/BH through 130BS/BH
PHYSICAL DATA
AGZ MODEL NUMBER
110B
120B
100B
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW)
Number Of Refrigerant Circuits
Unit Operating Charge, R-22, lbs.
Unit Operating Charge, R-22, (kg)
Cabinet Dimensions, LxWxH, in.
Cabinet Dimensions, LxWxH, (mm)
Unit Operating Weight, Lbs. (kg)
Unit Shipping Weight, Lbs. (kg)
Add'l Weight If Copper Finned Coils, lbs. (kg)
130B
Ckt.1
Ckt.2
97.6 (342.6)
2
76
86
(35)
(39)
173.1 x 88.0 x 100.4
4397 x 2235 x 2550
7870 (3565)
7580 (3434)
1155 (524)
Ckt.1
Ckt.2
107.5 (378.4)
2
86
86
(39)
(39)
173.1 x 88.0 x 100.4
4397 x 2235 x 2550
8150 (3692)
7860 (3561)
1155 (524)
Ckt.1
Ckt.2
119.8 (421.7)
2
86
104
(39)
(47)
173.1 x 88.0 x 100.4
4397 x 2235 x 2550
8720 (3950)
8380 (3796)
1155 (524)
Ckt.1
Ckt.2
129.4 (455.5)
2
104
104
(47)
(47)
173.1 x 88.0 x 100.4
4397 x 2235 x 2550
9050 (4100)
8710 (3946)
1155 (524)
Trio Scrolls
15.0
20.0
3
3
140
148
(496)
(525)
Trio Scrolls
20.0
20.0
3
3
148
148
(525)
(525)
Trio Scrolls
20.0
25.0
3
3
148
200
(525)
(709)
Trio Scrolls
25.0
25.0
3
3
200
200
(709)
(709)
COMPRESSORS
Type
Nominal tonnage of each Compressor
Number Of Compressors per Circuit
Oil Charge Per Compressor, oz.
Oil Charge Per Compressor, (g)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Staging, 6 Stages, Circuit #1 in Lead
Staging, 6 Stages, Circuit #2 in Lead
0-14-33-48-67-81-100 0-17-33-50-67-83-100 0-15-33-48-67-81-100 0-17-33-50-67-83-100
0-19-33-52-67-86-100 0-17-33-50-67-83-100 0-19-33-52-67-86-100 0-17-33-50-67-83-100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, sq. ft.
Coil Face Area, (m2)
Finned Height x Finned Length, in.
105.3
105.3
105.3
105.3
105.3
105.3
105.3
105.3
9.8
9.8
9.8
9.8
9.8
9.8
9.8
9.8
50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6 50 x151.6
1270 x
1270 x
1270 x
1270 x
1270 x
1270 x
1270 x
1270 x
Finned Height x Finned Length, (mm)
3851
3851
3851
3851
3851
3851
3851
3851
Fins Per Inch x Rows Deep
16 x 3
16 x 3
16 x 3
16 x 3
16 x 3
16 x 3
16 x 3
16 x 3
Pumpdown Capacity, 90% Full Lbs. (kg)
196 (89) 196 (89) 196 (89) 196 (89) 196 (89) 196 (89) 196 (89) 196 (89)
Maximum Relief Valve Pressure Setting, psig
450
450
450
450
450
450
450
450
(kPa)
(3103)
(3103)
(3103)
(3103)
(3103)
(3103)
(3103)
(3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, in. (mm)
Number Of Motors - HP (kW)
Fan And Motor RPM, 60Hz
60 Hz Fan Tip Speed, FPM (m/sec)
60 Hz Total Unit Airflow, CFM (m3/sec)
8 – 30 (762)
8 – 2.0
1140
8950 (4224)
86,904 (41,020)
8 – 30 (762)
8 – 2.0
1140
8950 (4224)
86,904 (41,020)
8 – 30 (762)
8 – 2.0
1140
8950 (4224)
86,904 (41,020)
8 – 30 (762)
8 – 2.0
1140
8950 (4224)
86,904 (41,020)
1
2
12.8 x 7.9
324 x 2408
34 (127)
152 (1047)
1
2
12.8 x 7.9
324 x 2408
34 (127)
152 (1047)
1
2
14.0 x 8.0
356 x 2438
40 (150)
152 (1047)
1,
2
14.0 x 8.0
356 x 2438
40 (150)
152 (1047)
300 (2066)
300 (2066)
300 (2066)
300 (2066)
EVAPORATOR - SHELL AND TUBE
Number of Evaporators
Number of Refrigerant Circuits
Diameter, in. - Length, ft.
Diameter, (mm) – Length, (mm)
Water Volume, Gallons, (L)
Maximum Water Pressure, psig (kPa)
Maximum Refrigerant Working Pressure, psig
(kPa)
Water Inlet / Outlet Victaulic Connections, in.
(mm)
Drain - NPT int, in. (mm)
Vent - NPT int, in. (mm)
5 (127)
5 (127)
5 (127)
5 (127)
0.5 (12.7)
0.5 (12.7)
0.5 (12.7)
0.5 (12.7)
0.5 (12.7)
0.5 (12.7)
0.5 (12.7)
0.5 (12.7)
NOTE:
1. Nominal capacity based on 95°F ambient air and 54°F/44°F water range.
IMM AGZ-7
AGZ 026B through 130B
35
Electrical Data, Standard Ambient
Table 23, AGZ 026BM/BS – 070BM/BS, Electrical Data, Single Point
(105°F and below)
AGZ Unit
Size
026B
030B
035B
040B
045B
050B
055B
060B
065B
070B
Volts
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
Power Supply
Field Wire
Minimum
Circuit
Ampacity
(MCA)
Quantity
133
126
80
68
52
146
143
88
74
58
158
150
96
79
64
167
167
113
81
70
184
184
121
94
78
199
199
127
104
86
221
214
145
108
96
248
228
156
112
105
281
281
162
124
109
301
301
168
130
112
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Wire
Gauge
75C
Recomm’d.
Fuse
Or HACR
Breaker
Size
Max. Fuse
Or HACR
Breaker
Size
1/0
#1
#4
#4
#6
1/0
1/0
#3
#4
#6
2/0
1/0
#3
#4
#6
2/0
2/0
#2
#4
#4
3/0
3/0
#1
#3
#4
3/0
3/0
#1
#2
#3
4/0
4/0
1/0
#2
#3
250
4/0
2/0
#2
#2
300
300
2/0
#1
#2
350
350
2/0
#1
#2
150
150
90
80
60
175
175
100
80
70
175
175
110
90
70
200
200
125
90
80
225
225
125
110
90
225
225
150
125
100
250
250
175
125
110
300
250
175
150
125
350
350
200
150
125
350
350
200
150
125
150
150
90
80
60
175
175
100
90
70
175
175
110
90
70
200
200
125
90
80
225
225
125
110
90
225
225
150
125
100
250
250
175
125
110
300
250
175
150
125
350
350
200
150
125
350
350
200
150
125
NOTES:
1. Units operating in ambient temperatures of 95°F (35°C) and above must use the
Maximum Fuse or HACR Breaker size.
2. All Electrical Data notes are on page 52.
3. Conduit hubs are not provided.
36
AGZ 026B through 130B
IMM AGZ-7
Table 24, AGZ 026BM/BS – 070BM/BS, Compressor and Fan Motor Amps, Single and
Multi-Point (105°F and below))
Rated Load Amps
AGZ
Unit
Size
026B
030B
035B
040B
045B
050B
055B
060B
065B
070B
IMM AGZ-7
F.L.Amps
Compressors
Volts
Fan
No. 1 No. 3 No. 5 No. 2 No. 4 No. 6 Motors
(Each)
208
25.7
25.7
25.7 25.7
5.8
230
24.2
24.2
24.2 24.2
5.8
380
14.9
14.9
14.9 14.9
4.1
460
13.4
13.4
13.4 13.4
2.8
575
9.3
9.3
9.3
9.3
3.0
208
25.7
25.7
31.8 31.8
5.8
230
24.2
24.2
31.8 31.8
5.8
380
14.9
14.9
18.6 18.6
4.1
460
13.4
13.4
16.0 16.0
2.8
575
9.3
9.3
12.2 12.2
3.0
208
31.8
31.8
31.8 31.8
5.8
230
29.9
29.9
29.9 29.9
5.8
380
18.6
18.6
18.6 18.6
4.1
460
16.0
16.0
16.0 16.0
2.8
575
12.2
12.2
12.2 12.2
3.0
208
33.8
33.8
33.8 33.8
5.8
230
33.8
33.8
33.8 33.8
5.8
380
22.8
22.8
22.8 22.8
4.1
460
16.5
16.5
16.5 16.5
2.8
575
13.7
13.7
13.7 13.7
3.0
208
33.8
33.8
41.4 41.4
5.8
230
33.8
33.8
41.4 41.4
5.8
380
22.8
22.8
26.0 26.0
4.1
460
16.5
16.5
21.8 21.8
2.8
575
13.7
13.7
17.3 17.3
3.0
208
41.4
41.4
41.4 41.4
5.8
230
41.4
41.4
41.4 41.4
5.8
380
26.0
26.0
26.0 26.0
4.1
460
21.8
21.8
21.8 21.8
2.8
575
17.3
17.3
17.3 17.3
3.0
208
41.0
41.0
51.3 51.3
5.8
230
41.0
41.0
48.1 48.1
5.8
380
26.0
26.0
33.8 33.8
4.1
460
21.8
21.8
23.7 23.7
2.8
575
17.3
17.3
21.8 21.8
3.0
208
52.8
52.8
52.8 52.8
5.8
230
48.1
48.1
48.1 48.1
5.8
380
32.7
32.7
32.7 32.7
4.1
460
23.7
23.7
23.7 23.7
2.8
575
21.8
21.8
21.8 21.8
3.0
208
52.8
52.8
52.8 73.1
7.8
230
52.8
52.8
52.8 73.1
7.8
380
32.7
32.7
32.7 38.2
4.1
460
23.7
23.7
23.7 30.1
3.6
575
21.8
21.8
21.8 25.2
3.0
208
52.8
73.1
52.8 73.1
7.8
230
52.8
73.1
52.8 73.1
7.8
380
32.7
38.2
32.7 38.2
4.1
460
23.7
30.1
23.7 30.1
3.6
575
21.8
25.2
21.8 25.2
3.0
All Electrical Data notes are on page 52.
Locked Rotor Amps
No. Of
Fan
Motors
AGZ 026B through 130B
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Compressors
Fan
Motors
(Each)
No.1
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
189
189
112
99
74
189
189
112
99
74
232
232
144
125
100
278
278
151
127
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
425
425
239
187
148
Across-The-Line
No. 3 No. 5
189
189
112
99
74
189
189
112
99
74
232
232
144
125
100
278
278
151
127
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
505
505
280
225
180
-
No.2
No.4
No. 6
189
189
112
99
74
232
232
144
125
100
232
232
144
125
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
425
425
239
187
148
425
425
239
187
148
189
189
112
99
74
232
232
144
125
100
232
232
144
125
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
505
505
280
225
180
505
505
280
225
180
-
37
Table 25, AGZ 026 BM/BS – 070BM/BS, Field Wiring, Single Point
(105°F and below)
Wiring to Standard
Power Block
Volts
Connector Wire
Terminal
Range
Amps
(Copper Wire Only)
208
175
14 GA – 2/0
230
175
14 GA – 2/0
026B
380
175
14 GA – 2/0
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
030B
380
175
14 GA – 2/0
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
035B
380
175
14 GA – 2/0
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
040B
380
175
14 GA – 2/0
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
045B
380
175
14 GA – 2/0
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
050B
380
175
14 GA – 2/0
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
055B
380
175
14 GA – 2/0
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
060B
380
380
#4 – 500kcmil
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
065B
380
380
#4 – 500kcmil
460
175
14 GA – 2/0
575
175
14 GA – 2/0
208
380
#4 – 500kcmil
230
380
#4 – 500kcmil
070B
380
380
#4 – 500kcmil
460
380
#4 – 500kcmil
575
175
14 GA – 2/0
All Electrical Data notes are on page 52.
AGZ
Unit
Size
38
AGZ 026B through 130B
Wiring to Optional
Non-Fused Disconnect Switch
Connector Wire
Disconnect
Range
Size
(Copper Wire Only)
225
# 4 - 300 kcmil
225
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
225
# 4 - 300 kcmil
225
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
225
# 4 - 300 kcmil
225
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
225
# 4 - 300 kcmil
225
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
225
# 4 - 300 kcmil
225
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
250
#6 - 350 kcmil
250
#6 - 350 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
400
250 kcmil -500 kcmil
400
250 kcmil -500 kcmil
250
#6 - 350 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
400
250 kcmil -500 kcmil
400
250 kcmil -500 kcmil
250
#6 - 350 kcmil
150
# 4 - 300 kcmil
150
# 4 - 300 kcmil
400
250 kcmil -500 kcmil
400
250 kcmil -500 kcmil
250
#6 - 350 kcmil
250
# 4 - 300 kcmil
150
# 4 - 300 kcmil
400
250 kcmil -500 kcmil
400
250 kcmil -500 kcmil
250
#6 - 350 kcmil
250
# 4 - 300 kcmil
150
# 4 - 300 kcmil
IMM AGZ-7
Table 26, AGZ 075BM/BS – 130BM/BS, Electrical Wiring,
Single Point (105°F and below)
AGZ Unit
Size
075B
085B
090B
100B
110B
120B
130B
Volts
Minimum
Circuit
Ampacity
(MCA)
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
358
358
187
150
125
380
380
219
171
136
414
414
248
188
146
463
463
260
199
171
528
528
282
220
182
613
613
323
248
198
613
613
361
273
212
Power Supply
Field Wire
Wire
Quantity
Gauge
75C
6
4/0
6
4/0
3
3/0
3
1/0
3
#1
6
250
6
250
3
250
3
2/0
3
1/0
6
300
6
300
3
250
3
3/0
3
1/0
6
350
6
300
3
300
3
3/0
3
2/0
6 - (2)
300
6 - (2)
300
3
300
3
4/0
3
3/0
6 - (2)
350
6 - (2)
350
3
400
3
250
3
3/0
6 - (2)
350
6 - (2)
350
6
4/0
3
300
3
4/0
Recomm’d.
Fuse
Or HACR
Breaker
Size
Max. Fuse
400
400
225
175
150
450
450
250
200
150
500
500
300
225
175
500
500
300
225
175
600
600
300
250
200
700
700
350
250
225
700
700
400
300
225
400
400
225
175
150
450
450
250
200
150
500
500
300
225
175
500
500
300
225
175
600
600
300
250
200
700
700
350
250
225
700
700
400
300
225
Or HACR
Breaker
Size
NOTES:
1. Units operating in ambient temperatures of 95°F (35°C) and above must use the Maximum
Fuse or HACR Breaker size.
2. All Electrical Data notes are on page 52.
3. (2) indicates that two conduits are required.
4. Conduit hubs are not supplied.
IMM AGZ-7
AGZ 026B through 130B
39
Table 27, AGZ 075BM/BS – 130BM/BS, Compressor and Fan Motor Amps, Single and
Multi-Point (105°F and below)
AGZ
Unit
Size
075B
085B
090B
100B
110B
120B
130B
40
Rated Load Amps
Compressors
Volts
No. 1
No. 3 No. 5 No. 2
208
73.1
73.1
73.1
230
73.1
73.1
73.1
380
38.2
38.2
38.2
460
30.1
30.1
30.1
575
25.2
25.2
25.2
208
73.1
73.1
83.3
230
73.1
73.1
83.3
380
38.2
38.2
52.5
460
30.1
30.1
39.0
575
25.2
25.2
30.0
208
86.4
86.4
86.4
230
86.4
86.4
86.4
380
52.5
52.5
52.5
460
39.0
39.0
39.0
575
30.0
30.0
30.0
208
52.8
52.8 52.8 74.5
230
52.8
52.8 52.8 74.5
380
32.7
32.7 32.7 39.8
460
23.7
23.7 23.7 30.6
575
21.8
21.8 21.8 25.2
208
74.5
74.5 74.5 74.5
230
74.5
74.5 74.5 74.5
380
39.8
39.8 39.8 39.8
460
30.6
30.6 30.6 30.6
575
25.2
25.2 25.2 25.2
208
87.9
87.9 87.9 88.0
230
87.9
87.9 87.9 88.0
380
39.8
39.8 39.8 52.5
460
30.6
30.6 30.6 39.0
575
25.2
25.2 25.2 30.0
208
88.0
88.0 88.0 88.0
230
88.0
88.0 88.0 88.0
380
52.5
52.5 52.5 52.5
460
39.0
39.0 39.0 39.0
575
30.0
30.0 30.0 30.0
All Electrical Data notes are on page
No. 4
73.1
73.1
38.2
30.1
25.2
83.3
83.3
52.5
39.0
30.0
86.4
86.4
52.5
39.0
30.0
74.5
74.5
39.8
30.6
25.2
74.5
74.5
39.8
30.6
25.2
88.0
88.0
52.5
39.0
30.0
88.0
88.0
52.5
39.0
30.0
52.
F.L.
No. Of
Fan
Amps
Fan
Fan Motors Motors
No. 6
(Each) No.1
Motors
(Each)
7.8
6
31.7
505
7.8
6
35.6
505
4.1
6
20.0
280
3.6
6
17.8
225
3.0
6
14.0
180
7.8
6
31.7
505
7.8
6
35.6
505
4.1
6
20.0
280
3.6
6
17.8
225
3.0
6
14.0
180
7.8
6
31.7
500
7.8
6
35.6
500
4.1
6
20.0
305
3.6
6
17.8
250
3.0
6
14.0
198
74.5
7.8
8
31.7
425
74.5
7.8
8
35.6
425
39.8
4.1
8
20.0
239
30.6
3.6
8
17.8
187
25.2
3.0
8
14.0
148
74.5
7.8
8
31.7
505
74.5
7.8
8
35.6
505
39.8
4.1
8
20.0
280
30.6
3.6
8
17.8
225
25.2
3.0
8
14.0
180
88.0
7.8
8
31.7
505
88.0
7.8
8
35.6
505
52.5
4.1
8
20.0
280
39.0
3.6
8
17.8
225
30.0
3.0
8
14.0
180
88.0
7.8
8
31.7
500
88.0
7.8
8
35.6
500
52.5
4.1
8
20.0
305
39.0
3.6
8
17.8
250
30.0
3.0
8
14.0
198
AGZ 026B through 130B
Locked Rotor Amps
Compressors
Across-The-Line
No. 3 No. 5
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
425
425
239
187
148
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
425
425
239
187
148
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
No.2
No.4
No. 6
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
IMM AGZ-7
Table 28, AGZ 075BM/BS - 130BM/BS, Field Wiring, Single Point
(105°F and below)
Wiring to Standard
Power Block
Volts
Connector Wire
Terminal
Range
Amps
(Copper Wire Only)
208
760
2 GA – 500kcmil
230
760
2 GA – 500kcmil
075B
380
380
#4 – 500kcmil
460
380
#4 – 500kcmil
575
380
#4 – 500kcmil
208
760
2 GA – 500kcmil
230
760
2 GA – 500kcmil
085B
380
380
#4 – 500kcmil
460
380
#4 – 500kcmil
575
380
#4 – 500kcmil
208
760
2 GA – 500kcmil
230
760
2 GA – 500kcmil
090B
380
380
#4 – 500kcmil
460
380
#4 – 500kcmil
575
380
#4 – 500kcmil
208
760
2 GA – 500kcmil
230
760
2 GA – 500kcmil
100B
380
380
#4 – 500kcmil
460
380
#4 – 500kcmil
575
380
#4 – 500kcmil
208
760
2 GA – 500kcmil
230
760
2 GA – 500kcmil
110B
380
380
#4 – 500kcmil
460
380
#4 – 500kcmil
575
380
#4 – 500kcmil
208
760
2 GA – 500kcmil
230
760
2 GA – 500kcmil
120B
380
380
#4 – 500kcmil
460
380
#4 – 500kcmil
575
380
#4 – 500kcmil
208
760
2 GA – 500kcmil
230
760
2 GA – 500kcmil
130B
380
760
2 GA – 500kcmil
460
380
#4 – 500kcmil
575
380
#4 – 500kcmil
All Electrical Data notes are on page 52.
AGZ
Unit
Size
IMM AGZ-7
AGZ 026B through 130B
Wiring to Optional
Non-Fused Disconnect Switch
Disconnect Connector Wire Range
Size
(Copper Wire Only)
600
600
250
250
250
600
600
400
250
250
600
600
400
250
250
600
600
400
400
250
800
800
400
400
400
800
800
400
400
400
800
800
600
400
400
(2) 250 kcmil -500 kcmil
(2) 250 kcmil -500 kcmil
#6 - 350 kcmil
#6 - 350 kcmil
#6 - 350 kcmil
(2) 250 kcmil -500 kcmil
(2) 250 kcmil -500 kcmil
250 kcmil -500 kcmil
#6 - 350 kcmil
#6 - 350 kcmil
(2) 250 kcmil -500 kcmil
(2) 250 kcmil -500 kcmil
250 kcmil -500 kcmil
#6 - 350 kcmil
#6 - 350 kcmil
(2) 250 kcmil -500 kcmil
(2) 250 kcmil -500 kcmil
250 kcmil -500 kcmil
250 kcmil -500 kcmil
#6 - 350 kcmil
(2) 250 kcmil -500 kcmil
(2) 250 kcmil -500 kcmil
250 kcmil -500 kcmil
(2) 3/0-250 kcmil
(2) 3/0-250 kcmil
(2) 250 kcmil -500 kcmil
(2) 250 kcmil -500 kcmil
250 kcmil -500 kcmil
250 kcmil -500 kcmil
(2) 3/0-250 kcmil
(2) 250 kcmil -500 kcmil
(2) 250 kcmil -500 kcmil
(2) 3/0-250 kcmil
250 kcmil -500 kcmil
(2) 3/0-250 kcmil
41
Table 29, AGZ 026BM/BS – 070BM/BS, Electrical Data, Multi-Point
(105°F and below)
AGZ
Unit
Size
Volts
Electrical Circuit #1
Electrical Circuit #2
Max.
Recomm’d
Power
Supply
Power
Supply Recomm’d
Max. Fuse Minimum
Minimum
Fuse
Fuse
Fuse
Field
Wire
Field
Wire
Circuit
or HACR
Circuit
or HACR
or HACR
or HACR
Breaker Ampacity
Ampacity
Wire
Wire
Breaker
Breaker
Breaker
Qty
Qty
(MCA)
Size
(MCA)
Gauge
Gauge
Size
Size
Size
70
3
#4
80
90
70
3
#4
80
90
66
3
#4
80
90
66
3
#4
80
90
42
3
#8
50
50
42
3
#8
50
50
36
3
#8
45
45
36
3
#8
45
45
27
3
#10
35
35
27
3
#10
35
35
70
3
#4
80
90
83
3
#4
100
110
66
3
#4
80
90
83
3
#4
100
100
42
3
#8
50
50
50
3
#8
60
60
36
3
#8
45
45
42
3
#8
50
50
27
3
#10
35
35
34
3
#10
40
45
83
3
#4
100
110
83
3
#4
100
110
79
3
#4
100
100
79
3
#4
100
100
50
3
#8
60
60
50
3
#8
60
60
42
3
#8
50
50
42
3
#8
50
50
34
3
#10
40
45
34
3
#10
40
45
88
3
#3
110
110
88
3
#3
110
110
88
3
#3
110
100
88
3
#3
110
100
60
3
#6
70
80
60
3
#6
70
80
43
3
#8
50
50
43
3
#8
50
50
37
3
#8
45
50
37
3
#8
45
50
88
3
#3
110
110
105
3
#2
125
125
88
3
#3
110
110
105
3
#2
125
125
60
3
#6
70
80
67
3
#4
80
80
43
3
#8
50
50
55
3
#6
70
70
37
3
#8
45
50
45
3
#8
50
60
105
3
#2
125
125
105
3
#2
125
125
105
3
#2
125
125
105
3
#2
125
125
67
3
#4
80
80
67
3
#4
80
80
55
3
#6
70
70
55
3
#6
70
70
45
3
#8
50
60
45
3
#8
50
60
105
3
#2
125
125
120
3
#1
150
150
105
3
#2
125
125
120
3
#1
150
150
67
3
#4
80
80
82
3
#3
100
110
55
3
#6
70
70
59
3
#6
70
80
45
3
#8
50
60
55
3
#6
70
70
120
3
#1
150
150
120
3
#1
150
150
120
3
#1
150
150
120
3
#1
150
150
82
3
#3
100
110
82
3
#3
100
110
59
3
#6
70
80
59
3
#6
70
80
55
3
#6
70
70
55
3
#6
70
70
135
3
1/0
175
175
160
3
2/0
200
225
135
3
1/0
175
175
160
3
2/0
200
225
82
3
#4
100
110
89
3
#3
110
125
61
3
#6
70
80
69
3
#4
90
100
55
3
#6
70
70
59
3
#6
70
80
160
3
2/0
200
225
160
3
2/0
200
225
160
3
2/0
200
225
160
3
2/0
200
225
89
3
#3
110
125
89
3
#3
110
125
69
3
#4
90
100
69
3
#4
90
100
59
3
#6
70
80
59
3
#6
70
80
208
230
026B 380
460
575
208
230
030B 380
460
575
208
230
035B 380
460
575
208
230
040B 380
460
575
208
230
045B 380
460
575
208
230
050B 380
460
575
208
230
055B 380
460
575
208
230
060B 380
460
575
208
230
065B 380
460
575
208
230
070B 380
460
575
NOTES:
1.
All Electrical Data notes are on page 52.
2.
Conduit hubs are not supplied.
42
AGZ 026B through 130B
IMM AGZ-7
Table 30, AGZ 026BM/BS - 070BM/BS, Field Wiring, Multi-Point
(105°F and below)
AGZ
Unit
Size
Wiring to Standard
Power Block
Volts
Terminal
Amps
Connector Wire Range
(Copper Wire Only)
Cir #1
Cir #2
Cir #1
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
026B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
030B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
035B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
040B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
045B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
050B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
055B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
175
175
14 GA – 2/0
230
175
175
14 GA – 2/0
060B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
380
380
#4 – 500 kcmil
230
380
380
#4 – 500 kcmil
065B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
208
380
380
#4 – 500 kcmil
230
380
380
#4 – 500 kcmil
070B
380
175
175
14 GA – 2/0
460
175
175
14 GA – 2/0
575
175
175
14 GA – 2/0
All Electrical Data notes are on page 52.
IMM AGZ-7
Wiring to Optional
Non-Fused Disconnect Switch
Cir #2
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil
#4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil
#4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
AGZ 026B through 130B
Disconnect Size
Cir #1
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
225
225
150
150
150
225
225
150
150
150
Cir #2
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
225
225
150
150
150
225
225
150
150
150
Connector Wire Range
(Copper Wire Only)
Cir #1
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#14 - 1/0
Cir #2
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#14 - 1/0
43
Table 31, AGZ 075BM/BS - 130BM/BS, Field Wiring Data (105°F and below)
AGZ
Unit
Size
075B
085B
090B
100B
110B
120B
Wiring to Standard
Power Block
Volts
Terminal
Amps
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
Cir #1
380
380
175
175
175
380
380
175
175
175
380
380
175
175
175
380
380
175
175
175
380
380
380
380
175
380
380
380
Cir #2
380
380
175
175
175
380
380
175
175
175
380
380
175
175
175
380
380
175
175
175
380
380
380
380
175
380
380
380
460
380
380
575
175
175
208
380
380
230
380
380
130B
380
380
380
460
380
380
575
175
175
All Electrical Data notes are on
44
Connector Wire Range
(Copper Wire Only)
Cir #1
Cir #2
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500
#4 – 500 kcmil14
kcmil14
14 GA – 2/0
14 GA – 2/0
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
#4 – 500 kcmil #4 – 500 kcmil
14 GA – 2/0
14 GA – 2/0
page 52.
AGZ 026B through 130B
Wiring to Optional
Non-Fused Disconnect Switch
Disconnect Size
Connector Wire Range
(Copper Wire Only)
Cir #1
250
250
250
150
150
250
250
250
150
150
250
250
250
150
150
250
250
150
150
150
400
400
250
250
150
400
400
250
Cir #2
250
250
250
150
150
250
250
250
150
150
250
250
250
150
150
400
400
250
250
150
400
400
250
250
150
400
400
250
Cir #1
#4 – 300 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#14 - 1/0
250 – 500 kcmil
250 – 500 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
250 – 500 kcmil
250 – 500 kcmil
#4 – 300 kcmil
Cir #2
#4 – 300 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
#4 – 300 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
250 – 500 kcmil
250 – 500 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
250 – 500 kcmil
250 – 500 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
250 – 500 kcmil
250 – 500 kcmil
#4 – 300 kcmil
250
250
#4 – 300 kcmil
#4 – 300 kcmil
150
400
400
250
250
150
150
400
400
250
250
150
#14 - 1/0
250 – 500 kcmil
250 – 500 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
#14 - 1/0
250 – 500 kcmil
250 – 500 kcmil
#4 – 300 kcmil
#4 – 300 kcmil
#14 - 1/0
IMM AGZ-7
Table 32, AGZ 065BM/BS - 130BM/BS, Electrical Data, Multi-Point
(105°F and below)
Electrical Circuit #1
Electrical Circuit #2
Power
Power
Max.
Recomm’d
Recomm’d
Supply
Supply
Max. Fuse Minimum
Minimum
AGZ
Fuse
Fuse
Fuse
Circuit
or HACR
Field Wire
Field Wire
Unit Volts Circuit
or HACR or HACR
or HACR
Breaker Ampacity
Ampacity
Wire
Wire
Size
Breaker
Breaker
Breaker
(MCA)
Size
(MCA)
Qty Gauge
Qty Gauge
Size
Size
Size
75C
75C
208
188
3
3/0
225
250
188
3
3/0
225
250
230
188
3
3/0
225
250
188
3
3/0
225
250
075B 380
98
3
#3
110
125
98
3
#3
110
125
460
79
3
#4
90
110
79
3
#4
90
110
575
66
3
#4
80
90
66
3
#4
80
90
208
188
3
3/0
225
250
218
3
4/0
250
300
230
188
3
3/0
225
250
218
3
4/0
250
250
085B 380
98
3
#3
110
125
130
3
#1
150
175
460
79
3
#4
90
110
99
3
#3
125
125
575
66
3
#4
80
90
77
3
#4
90
100
208
218
3
4/0
250
300
218
3
4/0
250
300
230
218
3
4/0
250
250
218
3
4/0
250
250
090B 380
130
3
#1
150
175
130
3
#1
150
175
460
99
3
#3
125
125
99
3
#3
125
125
575
77
3
#4
90
100
77
3
#4
90
100
208
203
3
4/0
250
250
273
3
300
300
300
230
203
3
3/0
225
225
273
3
300
300
300
100B 380
123
3
#1
150
150
146
3
1/0
175
200
460
92
3
#3
110
110
114
3
#1
150
175
575
83
3
#4
100
100
94
3
#3
110
125
208
273
3
300
300
300
273
3
300
300
300
230
273
3
300
300
300
273
3
300
300
300
110B 380
146
3
1/0
175
175
146
3
1/0
175
175
460
114
3
#1
125
125
114
3
#1
125
125
575
94
3
#3
110
110
94
3
#3
110
110
208
317
3
300
400
400
317
3
400
400
400
230
317
3
300
400
400
318
3
400
400
400
120B 380
146
3
1/0
175
175
187
3
2/0
225
225
460
114
3
#1
125
125
141
3
1/0
175
175
575
94
3
#3
110
110
110
3
#2
125
125
208
317
3
400
400
400
317
3
400
400
400
230
318
3
400
400
400
318
3
400
400
400
130B 380
187
3
2/0
225
225
187
3
2/0
225
225
460
141
3
1/0
175
175
141
3
1/0
175
175
575
110
3
#2
125
125
110
3
#2
125
125
NOTES:
1. All Electrical Data notes are on page 52.
2. Conduit hubs are not supplied.
IMM AGZ-7
AGZ 026B through 130B
45
Electrical Data High Ambient
Table 33, AGZ 026BB/BH – 070BB/BH, Electrical Data,
Single Point (Above 105°F to 125°F)
AGZ Unit
Size
026B
030B
035B
040B
045B
050B
055B
060B
065B
070B
Volts
Minimum
Circuit
Ampacity
(MCA)
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
147
133
80
68
53
158
144
88
74
59
168
155
96
80
64
187
167
113
84
70
207
188
123
94
78
226
207
132
104
86
249
229
147
115
96
270
248
160
124
105
303
282
164
138
115
323
304
172
150
123
Power Supply
Field Wire
Wire
Quantity
Gauge
75C
3
1/0
3
1/0
3
#4
3
#4
3
#6
3
2/0
3
1/0
3
#3
3
#4
3
#6
3
2/0
3
2/0
3
#3
3
#4
3
#6
3
3/0
3
2/0
3
#2
3
#4
3
#4
3
4/0
3
3/0
3
#1
3
#3
3
#4
3
4/0
3
3/0
3
1/0
3
#2
3
#3
3
250
3
4/0
3
1/0
3
#2
3
#3
3
300
3
250
3
2/0
3
#1
3
#2
3
350
3
300
3
2/0
3
1/0
3
#2
3
400
3
350
3
2/0
3
1/0
3
#1
Recomm’d.
Fuse
Or HACR
Breaker
Size
Max. Fuse
Or HACR
Breaker
Size
175
150
90
80
60
175
175
100
90
70
200
175
110
90
70
200
200
125
90
80
225
225
125
110
90
225
225
150
125
100
250
250
175
125
110
300
250
175
150
125
350
350
200
175
125
400
350
200
175
150
175
150
90
80
60
175
175
100
90
70
200
175
110
90
70
200
200
125
90
80
225
225
125
110
90
225
225
150
125
100
250
250
175
125
110
300
250
175
150
125
350
350
200
175
125
400
350
200
175
150
NOTES:
1. Units operating in ambient temperatures above 95°F (35°C)
must use the Maximum Fuse or HACR Breaker size.
2. All Electrical Data notes are on page 52.
3. Conduit hubs are not provided.
46
AGZ 026B through 130B
IMM AGZ-7
Table 34, AGZ 026BB/BH – 070BB/BH, Compressor and Fan Motor Amps, Single and
Multi-Point (Above 105°F to 125°F))
AGZ
Unit
Size
026B
030B
035B
040B
045B
050B
055B
060B
065B
070B
IMM AGZ-7
Rated Load Amps
Compressors
Volts
No. 1
No. 3 No. 5 No. 2
208
29.0
29.0
230
25.7
25.7
380
14.9
14.9
460
13.4
13.4
575
9.5
9.5
208
29.0
29.0
230
25.7
25.7
380
14.9
14.9
460
13.4
13.4
575
9.5
9.5
208
34.0
34.0
230
30.9
30.9
380
18.6
18.6
460
16.2
16.2
575
12.2
12.2
208
38.5
38.5
230
33.8
33.8
380
22.8
22.8
460
17.0
17.0
575
13.7
13.7
208
38.5
38.5
230
33.8
33.8
380
22.8
22.8
460
17.0
17.0
575
13.7
13.7
208
47.6
47.6
230
43.3
43.3
380
27.2
27.2
460
21.8
21.8
575
17.3
17.3
208
47.6
47.6
230
43.3
43.3
380
27.2
27.2
460
21.8
21.8
575
17.3
17.3
208
58.1
58.1
230
52.8
52.8
380
33.8
33.8
460
26.5
26.5
575
21.8
21.8
208
58.1
58.1
230
52.8
52.8
380
32.7
32.7
460
25.5
25.5
575
21.8
21.8
208
58.1
78.0
230
52.8
74.1
380
32.7
39.8
460
25.5
37.5
575
21.8
29.9
All Electrical Data notes
-
29.0
25.7
14.9
13.4
9.5
34.0
30.9
18.6
16.2
12.2
34.0
30.9
18.6
16.2
12.2
38.5
33.8
22.8
17.0
13.7
47.6
43.3
27.2
21.8
17.3
47.6
43.3
27.2
21.8
17.3
58.1
52.8
33.8
26.5
21.8
58.1
52.8
33.8
26.5
21.8
58.1
52.8
32.7
25.5
21.8
58.1
52.8
32.7
25.5
21.8
are on page
No. 4
29.0
25.7
14.9
13.4
9.5
34.0
30.9
18.6
16.2
12.2
34.0
30.9
18.6
16.2
12.2
38.5
33.8
22.8
17.0
13.7
47.6
43.3
27.2
21.8
17.3
47.6
43.3
27.2
21.8
17.3
58.1
52.8
33.8
26.5
21.8
58.1
52.8
33.8
26.5
21.8
78.0
74.1
39.8
37.5
29.9
78.0
74.1
39.8
37.5
29.9
52.
No.
R.L.Amps
F.L.Amps
of
Fan
Fan
Fan
No. 6 Motors Motors Motors
(Each)
(Each)
-
5.8
5.8
4.1
2.8
3.0
5.8
5.8
4.1
2.8
3.0
5.8
5.8
4.1
2.8
3.0
5.8
5.8
4.1
2.8
3.0
5.8
5.8
4.1
2.8
3.0
5.8
5.8
4.1
2.8
3.0
5.8
5.8
4.1
2.8
3.0
5.8
5.8
4.1
2.8
3.0
7.8
7.8
4.1
3.6
3.0
7.8
7.8
4.1
3.6
3.0
AGZ 026B through 130B
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
23.3
26.1
20.0
13.0
14.0
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
Locked Rotor Amps
Compressors
Across-The-Line
No.1
189
189
112
99
74
189
189
112
99
74
232
232
144
125
100
278
278
151
127
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
425
425
239
187
148
No. 3 No. 5
189
189
112
99
74
189
189
112
99
74
232
232
144
125
100
278
278
151
127
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
505
505
280
225
180
-
No.2
No.4
No. 6
189
189
112
99
74
232
232
144
125
100
232
232
144
125
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
425
425
239
187
148
425
425
239
187
148
189
189
112
99
74
232
232
144
125
100
232
232
144
125
100
278
278
151
127
100
350
350
195
158
125
350
350
195
158
125
425
425
239
187
148
425
425
239
187
148
505
505
280
225
180
505
505
280
225
180
-
47
Table 35, AGZ 026BB/BH - 070BB/BH, Electrical Data, Multi-Point (Above 105°F
to 125°F)
AGZ
Unit
Size
Volts
Electrical Circuit #1
Electrical Circuit #2
Power Supply Recomm’d
Power Supply Recomm’d
Max.
Max. Fuse Minimum
Minimum
Fuse
Fuse
Fuse
Field Wire
Field Wire
Circuit
or HACR
Circuit
or HACR
or HACR
Wire
Wire or HACR
Breaker Ampacity
Ampacity
Breaker
Breaker
Qty Gauge
Qty Gauge Breaker
(MCA)
Size
(MCA)
Size
Size
Size
75C
75C
77
3
#4
90
100
77
3
#4
90
100
70
3
#4
80
90
70
3
#4
80
90
42
3
#8
50
50
40
3
#8
50
50
36
3
#8
45
45
36
3
#8
45
45
27
3
#10
35
35
27
3
#10
35
35
77
3
#4
90
100
88
3
#3
100
110
70
3
#4
80
90
81
3
#4
100
110
42
3
#8
50
50
50
3
#8
60
60
36
3
#8
45
45
42
3
#8
50
50
27
3
#10
35
35
34
3
#10
45
45
88
3
#3
100
110
88
3
#3
100
110
81
3
#4
100
110
81
3
#4
100
110
50
3
#8
60
60
50
3
#8
60
60
42
3
#8
50
50
42
3
#8
50
50
34
3
#10
45
45
34
3
#10
45
45
98
3
#3
125
125
98
3
#3
125
125
88
3
#3
110
110
88
3
#3
110
110
60
3
#6
70
80
60
3
#6
70
80
44
3
#8
50
60
44
3
#8
50
60
37
3
#8
45
50
37
3
#8
45
50
98
3
#3
125
125
119
3
#1
150
150
88
3
#3
110
110
109
3
#2
125
150
60
3
#6
70
80
70
3
#4
80
90
44
3
#8
50
60
55
3
#6
70
70
37
3
#8
45
50
45
3
#8
60
60
119
3
#1
150
150
119
3
#1
150
150
109
3
#2
125
150
109
3
#2
125
150
70
3
#4
80
90
70
3
#4
80
90
55
3
#6
70
70
55
3
#6
70
70
45
3
#8
60
60
45
3
#8
60
60
119
3
#1
150
150
142
3
1/0
175
200
109
3
#2
125
150
130
3
#1
175
175
70
3
#4
80
90
84
3
#4
100
110
55
3
#6
70
70
65
3
#4
80
90
45
3
#8
60
60
55
3
#6
70
70
142
3
1/0
175
200
142
3
1/0
175
200
130
3
#1
175
175
130
3
#1
175
175
84
3
#4
100
110
84
3
#4
100
110
65
3
#4
80
90
65
3
#4
80
90
55
3
#6
70
70
55
3
#6
70
70
146
3
1/0
175
200
171
3
2/0
225
225
134
3
1/0
175
175
161
3
2/0
200
225
82
3
#4
100
110
91
3
#3
110
125
67
3
#6
80
90
80
3
#4
100
110
55
3
#6
70
70
65
3
#6
90
90
208
230
026B 380
460
575
208
230
030B 380
460
575
208
230
035B 380
460
575
208
230
040B 380
460
575
208
230
045B 380
460
575
208
230
050B 380
460
575
208
230
055B 380
460
575
208
230
060B 380
460
575
208
230
070B 380
460
575
NOTES:
1. All Electrical Data notes are on page 52.
2. Conduit hubs are not supplied.
48
AGZ 026B through 130B
IMM AGZ-7
Table 36, AGZ 075BB/BH – 130BB/BH, Electrical Data, Single Point
(Above 105°F to 125°F)
AGZ Unit
Size
075B
085B
090B
100B
110B
120B
130B
Volts
Minimum
Circuit
Ampacity
(MCA)
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
208
230
380
460
575
378
362
194
187
145
398
382
234
200
151
416
401
270
211
157
522
462
273
230
187
612
526
307
263
211
612
571
352
286
219
613
613
393
307
228
Power Supply
Field Wire
Wire
Quantity
Gauge
75C
6
250
6
4/0
3
3/0
3
3/0
3
1/0
6
250
6
250
3
250
3
4/0
3
1/0
6
300
6
350
3
300
3
4/0
3
2/0
6
400
6
350
3
300
3
4/0
3
3/0
6 - (2)
350
6 - (2)
300
3
350
3
300
3
4/0
6 - (2)
350
6 - (2)
350
6 - (2)
4/0
3
350
3
4/0
6 - (2)
350
6 - (2)
350
6
250
3
350
3
250
Recomm’d.
Fuse
Or HACR
Breaker
Size
Max. Fuse
450
400
225
225
175
450
450
250
225
175
500
450
300
250
175
600
500
300
250
200
700
600
350
300
225
700
600
400
300
250
700
700
450
350
250
450
400
225
225
175
450
450
250
225
175
500
450
300
250
175
600
500
300
250
200
700
600
350
300
225
700
600
400
300
250
700
700
450
350
250
Or HACR
Breaker
Size
NOTES:
1. Units operating in ambient temperatures of 95°F (35°C) and above
must use the Maximum Fuse or HACR Breaker size.
2. All Electrical Data notes are on page 52.
3. (2) in column with wire qty. indicates that two conduits are required.
4. Conduit hubs are not supplied.
IMM AGZ-7
AGZ 026B through 130B
49
Table 37, AGZ 075BB/BH – 130BB/BH, Compressor and Fan Motor Amps, Single and
Multi-Point (Above 105°F to 125°F)
AGZ
Unit
Size
075B
085B
090B
100B
110B
120B
130B
50
Rated Load Amps
Compressors
Volts
No. 1
No. 3 No. 5 No. 2
208
78.0
78.0
230
74.1
74.1
380
39.8
39.8
460
38.8
38.8
575
29.9
29.9
208
78.0
78.0
230
74.1
74.1
380
39.8
39.8
460
38.8
38.8
575
29.9
29.9
208
86.9
86.9
230
83.3
83.3
380
57.6
57.6
460
44.5
44.5
575
32.5
32.5
208
58.1
58.1 58.1
230
52.8
52.8 52.8
380
32.7
32.7 32.7
460
25.5
25.5 25.5
575
21.8
21.8 21.8
208
87.9
87.9 87.9
230
74.2
74.2 74.2
380
43.8
43.8 43.8
460
37.5
37.5 37.5
575
29.9
29.9 29.9
208
87.9
87.9 87.9
230
74.2
74.2 74.2
380
43.8
43.8 43.8
460
37.5
37.5 37.5
575
29.9
29.9 29.9
208
88.0
88.0 88.0
230
88.0
88.0 88.0
380
57.6
57.6 57.6
460
44.5
44.5 44.5
575
32.5
32.5 32.5
All Electrical Data notes are
No. 4
78.0
78.0
74.1
74.1
39.8
39.8
38.8
38.8
29.9
29.9
86.9
86.9
83.3
83.3
57.6
57.6
44.5
44.5
32.5
32.5
86.9
86.9
83.3
83.3
57.6
57.6
44.5
44.5
32.5
32.5
87.9
87.9
74.2
74.2
43.8
43.8
37.5
37.5
29.9
29.9
87.9
87.9
74.2
74.2
43.8
43.8
37.5
37.5
29.9
29.9
88.0
88.0
88.0
88.0
57.6
57.6
44.5
44.5
32.5
32.5
88.0
88.0
88.0
88.0
57.6
57.6
44.5
44.5
32.5
32.5
on page 52.
Locked Rotor Amps
Compressors
Across-The-Line
No.
R.L.Amps
F.L.Amps
of
Fan
Fan
Fan
No. 6 Motors Motors Motors
(Each)
(Each)
No.1
87.9
74.2
43.8
37.5
29.9
87.9
74.2
43.8
37.5
29.9
88.0
88.0
57.6
44.5
32.5
88.0
88.0
57.6
44.5
32.5
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
425
425
239
187
148
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
7.8
7.8
4.1
3.6
3.0
7.8
7.8
4.1
3.6
3.0
7.8
7.8
4.1
3.6
3.0
7.8
7.8
4.1
3.6
3.0
7.8
7.8
4.1
3.6
3.0
7.8
7.8
4.1
3.6
3.0
7.8
7.8
4.1
3.6
3.0
AGZ 026B through 130B
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
31.7
35.6
20.0
17.8
14.0
No. 3 No. 5
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
425
425
239
187
148
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
425
425
239
187
148
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
No.2
No.4
No. 6
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
505
505
280
225
180
505
505
280
225
180
500
500
305
250
198
500
500
305
250
198
IMM AGZ-7
Table 38, AGZ 075BB/BH – 130BB/BH, Electrical Data, Multi-Point
(Above 105°F to 125°F)
Electrical Circuit #1
Electrical Circuit #2
Power
Power
Max.
Recomm’d
Recomm’d
Supply
Supply
Max. Fuse Minimum
Minimum
AGZ
Fuse
Fuse
Fuse
Volts
Circuit
or
HACR
Circuit
Field
Wire
Field
Wire
Unit
or HACR or HACR
or HACR
Breaker Ampacity
Ampacity
Wire
Wire
Size
Breaker
Breaker
Breaker
(MCA)
Size
(MCA)
Qty Gauge
Qty Gauge
Size
Size
Size
75C
75C
208
199
3
3/0
225
250
199
3
3/0
225
250
230
190
3
3/0
225
250
190
3
3/0
225
250
075B 380
102
3
#2
125
125
102
3
#2
125
125
460
99
3
#3
110
125
99
3
#3
110
125
575
76
3
#4
90
100
76
3
#4
90
100
208
199
3
3/0
225
250
219
3
4/0
250
300
230
190
3
3/0
225
250
211
3
4/0
250
250
085B 380
102
3
#2
125
125
142
3
1/0
175
175
460
99
3
#3
110
125
111
3
#2
125
150
575
76
3
#4
90
100
83
3
#3
100
110
208
219
3
4/0
250
300
219
3
4/0
250
300
230
211
3
4/0
250
250
211
3
4/0
250
250
090B 380
142
3
1/0
175
175
142
3
1/0
175
175
460
111
3
#2
125
150
111
3
#2
125
150
575
83
3
#3
100
110
83
3
#3
100
110
208
220
3
4/0
250
250
317
3
400
350
400
230
203
3
4/0
225
250
272
3
300
300
300
100B 380
123
3
#1
150
150
159
3
2/0
175
200
460
101
3
#2
110
125
136
3
1/0
150
175
575
83
3
#4
100
100
109
3
#2
125
125
208
317
3
400
350
400
317
3
400
350
400
230
272
3
300
300
300
272
3
300
300
300
110B 380
159
3
2/0
175
200
159
3
2/0
175
200
460
136
3
1/0
150
175
136
3
1/0
150
175
575
109
3
#2
125
125
109
3
#2
125
125
208
317
3
400
400
400
317
3
400
400
400
230
272
3
300
300
300
317
3
400
400
400
120B 380
159
3
2/0
200
200
204
3
4/0
250
250
460
136
3
1/0
175
175
159
3
2/0
200
200
575
109
3
#2
125
125
118
3
#1
150
150
208
317
3
400
400
400
317
3
400
400
400
230
317
3
400
400
400
317
3
400
400
400
130B 380
204
3
4/0
250
250
204
3
4/0
250
250
460
159
3
2/0
200
200
159
3
2/0
200
200
575
118
3
#1
150
150
118
3
#1
150
150
NOTES:
1. All Electrical Data notes are on page 52.
2. Conduit hubs are not supplied.
IMM AGZ-7
AGZ 026B through 130B
51
Notes for “Electrical Data Single- and Multi-Point” Power:
1. Unit wire size ampacity (MCA) is equal to 125% of the largest compressormotor RLA plus 100% of RLA of all other loads in the circuit including the
control transformer.
2. The control transformer is furnished and no separate 115V power is
required. For both single- and multi-point power connections, the control
transformer is in circuit #1 with control power wired from there to circuit
#2. In multi-point power, disconnecting power to circuit will disconnect all
control power to the unit.
3. If a separate 115V power supply is used for the control circuit, then the
wire sizing amps is 10 amps for all unit sizes.
4. Recommended power lead wire sizes for 3 conductors per conduit are
based on 100% conductor ampacity in accordance with NEC. Voltage drop
has not been included. Therefore, it is recommended that power leads be
kept short. All terminal block connections must be made with copper (type
THW) wire.
5. “Recommended Fuse Sizes” are selected at approximately 150% to 175%
of the largest compressor RLA, plus 100% of all other loads in the circuit.
6. “Maximum Fuse or HACR breaker size” is selected at approximately 225%
of the largest compressor RLA, plus 100% of all other loads in the circuit.
7. The recommended power lead wire sizes are based on an ambient temperature
of 86°F (30°C). Ampacity correction factors must be applied for other ambient
temperatures. Refer to the National Electrical Code Handbook.
8. Must be electrically grounded according to national and local electrical codes.
Voltage Limitations:
1. Within ± 10 percent of nameplate rating
2. Voltage phase unbalance not to exceed 2% with a resultant current unbalance of 6
to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard.
Notes for “Compressor and Condenser Fan Amp Draw”:
1. Compressor RLA values are for wiring sizing purposes only but do not
reflect normal operating current draw at rated capacity.
Notes for “Field Wiring Data”
1. Requires a single disconnect to supply electrical power to the unit. This
power supply must either be fused or use an HACR type circuit breaker.
2. All field wiring to unit power block or optional non-fused disconnect
switch must be copper.
3. All field wire size values given in table apply to 75°C rated wire per NEC.
Circuit Breakers (AGZ 026 to 130)
Factory installed circuit breakers are standard on units with single point power supply
only. This option provides unit installed compressor short circuit protection and makes
servicing easier.
52
Connection Type
Power Block
Single Point (Standard)
Multi-Point (Optional)
Std
Std
Disconnect
Swt.
Opt.
Opt.
AGZ 026B through 130B
Circuit
Breakers
Std
Not Avail.
High Short
Circuit Current
Opt
Opt.
IMM AGZ-7
Figure 22, AGZ 026B – AGZ 130B, Typical Field Wiring
DISCONNECT
(BY OTHERS)
UNIT MAIN
TERMINAL BLOCK
GND LUG
3 PHASE
TO COMPRESSOR(S)
AND FAN MOTORS
POWER
NOTE: ALL FIELD WIRING TO BE
INSTALLED AS NEC CLASS 1
WIRING SYSTEM WITH CONDUCTOR
RATED 600 VOLTS
FIELD SUPPLIED
OPTION
FUSED CONTROL
CIRCUIT TRANSFORMER
120 VAC
DISCONNECT
(BY OTHERS)
TB1-20
N
TB1
10A
FUSE
120VAC
CONTROL POWER
1
(BY OTHERS)
CONTROL
CIRCUIT
FUSE
2
35
33
CHW PUMP RELAY
(BY OTHERS)
120 VAC 1.0 AMP MAX
ALARM BELL
OPTION
FACTORY SUPPLIED ALARM
FIELD WIRED
120 VAC
N
CONTROLLER
120 VAC
34
ALARM BELL RELAY
32
TIME
CLOCK
REMOTE STOP SWITCH
(BY OTHERS)
TB2
ON
52
IF REMOTE STOP
CONTROL IS USED,
REMOVE LEAD 585
FROM TERM. 52
TO 72.
585
72
MANUAL
OFF
ALARM BELL
RELAY
43
COM
NO
BELL
AUTO
ICE MODE SWITCH
(BY OTHERS)
GND
OFF
AUTO
1
83
ON
2
ALARM BELL OPTION
54
74
MANUAL
CHW FLOW SWITCH
---MANDATORY–(BY OTHERS)
44
NOR. OPEN PUMP AUX.
CONTACTS (OPTIONAL)
61
4-20MA FOR
EVAP. WATER RESET
(BY OTHERS)
+
4-20MA FOR
DEMAND LIMIT
(BY OTHERS)
+
68
-
69
70
-
71
GND
LESS EVAPORATOR ONLY
24 VAC
91
93
N
LIQUID LINE #1 SOLENOID
24 VAC 1.5 AMP MAX
24 VAC
92
93
DWG. 330423101 REV.0A
IMM AGZ-7
N
LIQUID LINE #2 SOLENOID
24 VAC 1.5 AMP MAX
AGZ 026B through 130B
53
Dimensional Data
Figure 23, Dimensions, AGZ 026BS – 070BS Packaged Chiller
ISOLATOR LOCATIONS ON BOTTOM OF RAIL
13.31
67.76 (1721.10)
13.31
(338.07)
COMPRESSOR (338.07)
CIRCUIT #1
COMPRESSOR
CIRCUIT #2
2.00
(50.8)
EVAPORATOR
2.00
(50.8)
55.65 (1413.51)
CONTROL PANEL
CONTROL
PANEL
POWER ENTRY
POINT
0.875 KNOCK OUT
FIELD CONTROL
CONNECTION
100.40
(2550.16)
8.80
(223.52)
43.75
(1111.25)
Y
33.52
(851.41)
19.94
(506.48)
EVAP
OUTLET
EVAP
INLET
Z
6.38
(162.05)
19.94
(506.48)
94.38 (2397.25)
AGZ 026BS
AGZ 030BS
AGZ 035BS
AGZ 040BS
AGZ 045BS
AGZ 050BS
AGZ 055BS
AGZ 060BS
AGZ 065BS
AGZ 070BS
54
14.33
(363.98)
DWG # 3305195
88.00 (2235.20)
Center of Gravity - Inches (mm)
Unit Size
X
X
Y
Z
39 (991)
39 (991)
40 (1016)
39 (991)
40 (1016)
40 (1016)
40 (1016)
40 (1016)
41 (1041)
41 (1041)
40 (1016)
40 (1016)
40 (1016)
39 (991)
38 (965)
39 (991)
39 (991)
39 (991)
40 (1016)
41 (1041)
42 (1067)
42 (1067)
42 (1067)
41 (1041)
41 (1041)
42 (1067)
43 (1092)
43 (1092)
45 (1143)
45 (1143)
Evap Inlet &
Outlet
Victaulic in.
3
3
3
3
3
3
3
3
3
3
AGZ 026B through 130B
Weights – Lbs (kg)
Shipping Weight
Operating Weight
3950 (1792)
3990 (1810)
4030 (1828)
4070 (1846)
4210 (1910)
4330 (1964)
4460 (2023)
4520 (2050)
4760 (2159)
4890 (2218)
3990 (1810)
4040 (1833)
4080 (1851)
4130 (1873)
4270 (1937)
4400 (1996)
4540 (2059)
4600 (2087)
4860 (2204)
4990 (2263)
IMM AGZ-7
Figure 24, AGZ 075BS - 090BS Packaged Chiller
ISOLATOR LOCATIONS ON BOTTOM OF RAIL
110.1 (2797)
COMPRESSORS CIRC. #2
12.4
(315)
12.
(315)
2.0
(51)
EVAPORATOR
INLET
OUTLET
2.0
(51)
14.3
(364)
COMPRESSORS CIRC. #1
60.0 (1525)
CONTROL
PANEL
POWER ENTRY
POINT
0.875 KNOCK OUT
CONTROL
PANEL
FIELD CONTROL
CONNECTION
100.4
(2550)
Y
43.8
(1111)
15.5
(392)
28.5 (724)
Z
6.4
(162)
28.5
(724)
88.0 (2235)
134.9 (3426)
Center of Gravity Inches (mm)
Unit Size
AGZ 075BS
AGZ 085BS
AGZ 090BS
IMM AGZ-7
14.4
(364)
X
X
Y
Z
44 (1118)
43 (1092)
44 (1118)
42 (1067)
40 (1016)
39 (991)
60 (1524)
60 (1524)
59 (1499)
Evap Inlet &
Outlet Victaulic
in.
5
5
5
AGZ 026B through 130B
Dwg. # 3305023
Weights Lbs. (kg)
Shipping Weight
Operating Weight
6320 (2867)
6480 (2939)
6640 (3012)
6530 (2962)
6690 (3035)
6850 (3107)
55
Figure 25, AGZ 100BS - 130BS Packaged Chiller
25.2
(641)
ISOLATOR LOCATIONS ON BOTTOM OF RAIL
67.8 (1721)
67.8 (1721)
COMPRESSORS CIRC. #2
12.4 (315)
2.0
(51)
EVAPORATOR
OUTLET
"A"
33.7
(855)
INLET
"A"
2.0
(51)
"B"
COMPRESSORS CIRC. #1
"C"
CONTROL
PANEL
POWER ENTRY POINT
CONTROL
PANEL
0.875 KNOCK OUTS
FIELD CONTROL
CONNECTION
100.4
(2550)
43.8
(1111)
Y
16.2
(410)
24.0
(610)
24.0
(610)
Z
6.4 (162)
X
173.1 (4396)
Unit Size
AGZ 100BS
AGZ 110BS
AGZ 120BS
AGZ 130BS
56
Evap Inlet
& Outlet
Victaulic
“A” in.
5
5
8
8
14.4 (365)
88.0 (2235)
Dwg. # 3305024
Evaporator Water
Connections
Inches (mm)
Center of Gravity
Inches (mm)
Weights
Lbs. (kg)
B
C
X
Y
Z
14.8 (375.9)
14. 8 (375.9)
15.3 (388.6)
15.3 (388.6)
93.5 (2374.9)
93.5 (2374.9)
92.4 (2346.9)
92.4 (2346.9)
43 (1092)
44 (1118)
43 (1092)
44 (1118)
43 (1092)
43 (1092)
40 (1016)
38 (965)
76 (1930)
75 (1905)
75 (1905)
74 (1880)
AGZ 026B through 130B
Shipping
Weight
7580 (3438)
7860 (3565)
8380 (3801)
8710 (3951)
Operating
Weight
7870 (3570)
8150 (3697)
8720 (3955)
9050 (4105)
IMM AGZ-7
R-407C Units
AGZ chillers are available with R-407C refrigerant as non-ARI certified units. R-407C is a
zeotropic blend of three compounds, and as such exhibits the characteristic of glide. It does
not behave as one substance like R-22 does. Glide is the difference (in degrees F) between
the beginning and end phase-change process in either the evaporator or condenser. During
these processes, different ratios of the refrigerant’s components change phase from the
beginning to the end of the process. The following functions, conditions and settings will
differ from units charged with R-22.
1.
2.
3.
4.
1.
Polyolester lubricants are used instead of mineral oil.
The saturated pressure/temperature relationship
Control and alarm settings
Charging procedures
Lubrication. The units are factory-charged with polyoester (POE) lubricant and one of
the following lubricants must be used if lubricant is to be added to the system:
Copeland Ultra 22 CC
Mobil EAL™ Arctic 22 CC
ICI EMKARATE RL RL™ 32CF
POEs are very hygroscopic and will quickly absorb moisture if exposed to air. Pump the
lubricant into the unit through a closed transfer system. Avoid overcharging the unit.
2. Pressure/temperature relationship. See Figure 26 on page 58 for the saturated pressuretemperature chart. Due to refrigerant glide, use the following procedures for superheat
and subcooling measurement.
To determine superheat, only vapor must be present at the point of measurement, no
liquid. Use the temperature reading, the pressure reading and the Saturated P/T Chart. If
the pressure is measured at 78 psig, the chart shows the saturated vapor temperature to be
50.6°F. If the temperature is measured at 60°F, the superheat is 9.4 degrees F.
To determine subcooling, only liquid must be present, no vapor. Use the temperature
reading, the pressure reading and the Saturated P/T Chart. If the pressure is measured at
250 psig, the chart shows the saturated liquid temperature to be 108.2°F. If the
temperature is measured at 98°F, the subcooling is 10.2 degrees F.
The P/T relationship between R-407C and R-22 is similar enough to allow the use of R-22
expansion valves. The valves may be marked as “R-22’ or “R-22/R-407C”.
3. Control and alarm settings. The software that controls the operation of the unit is
factory-set for operation with R-407C, taking into account that the pressure/temperature
relationship differs from R-22. The software functionality is the same for either
refrigerant.
4. Charging procedure. The units are factory-charged with R-407C. Use the following
procedure if recharging in the field is necessary:
Whether topping off a charge or replacing the circuit’s entire charge, always remove the
refrigerant from the charging vessel as a liquid. Many of the cylinders for the newer
refrigerants have a dip tube so that liquid is drawn off when the cylinder is in the upright
position. Do not vapor charge out of a cylinder unless the entire contents will be charged
into the system.
With the system in a 250-micron or lower vacuum, liquid can be charged into the
high side. Initially charge about 80 percent of the system total charge.
IMM AGZ-7
AGZ 026B through 130B
57
Start the system and observe operation. Use standard charging procedures (liquid
only) to top off the charge.
It may be necessary to add refrigerant through the compressor suction. Because the
refrigerant leaving the cylinder must be a liquid, exercise care to avoid damage to
the compressor. A sight glass can be connected between the charging hose and the
compressor. It can be adjusted to have liquid leave the cylinder and vapor enter the
compressor.
Figure 26, R-407C Saturated Pressure/Temperature Chart
Pressure
(PSIG)
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
98
100
105
110
115
120
125
130
135
140
145
58
Liquid Temp
(°F)
-10.7
-8.2
-5.7
-3.4
-1.1
1.1
3.2
5.3
7.3
9.2
11.1
12.9
14.7
16.4
18.1
19.7
21.3
22.9
24.4
25.9
27.4
28.8
30.2
31.6
33.0
34.3
35.6
36.9
38.2
39.4
40.6
41.9
43.0
44.2
45.4
46.5
47.6
48.7
49.8
50.9
51.9
54.5
57.0
59.5
61.8
64.1
66.4
68.5
70.7
72.8
Vapor Temp
(°F)
1.5
4.0
6.4
8.7
11.0
13.1
15.2
17.2
19.2
21.0
22.9
24.7
26.4
28.1
29.7
31.3
32.9
34.4
35.9
37.4
38.8
40.2
41.6
43.0
44.3
45.6
46.9
48.1
49.3
50.6
51.8
52.9
54.1
55.2
56.3
57.4
58.5
59.6
60.7
61.7
62.7
65.2
67.7
70.0
72.3
74.6
76.7
78.8
80.9
82.9
AGZ 026B through 130B
Pressure
(PSIG)
150
155
160
165
170
175
180
185
190
195
200
205
210
215
220
225
230
235
240
245
250
255
260
265
270
275
280
285
290
295
300
305
310
315
320
325
330
335
340
345
350
355
360
365
370
375
380
385
390
395
Liquid Temp
(°F)
74.8
76.8
78.7
80.6
82.5
84.3
86.1
87.8
89.6
91.3
92.9
94.6
96.2
97.7
99.3
100.8
102.3
103.8
105.3
106.7
108.2
109.6
111.0
112.3
113.7
115.0
116.3
117.6
118.9
120.2
121.4
122.7
123.9
125.1
126.3
127.5
128.7
129.8
131.0
132.1
133.2
134.3
135.4
136.5
137.6
138.7
139.8
140.8
141.8
142.9
Vapor Temp
(°F)
84.9
86.8
88.7
90.5
92.3
94.0
95.8
97.5
99.1
100.7
102.3
103.9
105.4
107.0
108.4
109.9
111.4
112.8
114.2
115.6
116.9
118.2
119.6
120.9
122.1
123.4
124.7
125.9
127.1
128.3
129.5
130.7
131.8
133.0
134.1
135.2
136.3
137.4
138.5
139.6
140.6
141.7
142.7
143.7
144.7
145.7
146.7
147.7
148.7
149.6
IMM AGZ-7
Startup
Pre Start-up
The chiller must be inspected to ensure no components became loose or damaged
during shipping or installation.
Start-Up
Refer to the MicroTech II Controller information in the operating manual OM AGZ-1
to become familiar with unit operation before starting the chiller.
There should be adequate building load (at least 50 percent of the unit full load
capacity) to properly check the operation of the chiller refrigerant circuits.
Be prepared to record all operating parameters required by the “Compressorized
Equipment Warranty Form”. Return this information within 10 working days to
McQuay International as instructed on the form to obtain full warranty benefits.
1. Verify chilled water flow.
2. Verify remote start / stop or time clock (if installed) has requested the chiller to
start.
3. Set the chilled water setpoint to the required temperature. (The system water
temperature must be greater than the total of the leaving water temperature setpoint
plus one-half the control band before the MicroTech II controller will stage on
cooling.)
4. Set the Evap Delta T and the Start Delta T as a starting point.
5. Put both pumpdown switches (PS1 and PS2) to the ON position.
6. Put system switch (S1) to ON position.
Switch
PS1, PS2,
Pumpdown
Switches
S1,
System Switch
Switch Position
ON
Circuits will operate in the
normal automatic mode
Unit will operate in the
normal automatic mode
OFF
Circuit will go through the
normal pumpdown cycle and
shut off.
Unit will shut off immediately
without pumping down
(emergency stop)
7. There may be a delay of 2 minutes after closing S1. The time delay is due to the
compressor inherent motor protection or the Stage Up Timer counting. This should
only occur on initial start-up or when power to the chiller has been turned off and
back on. More than one compressor will not start at the same time.
8. After the chiller has been operating for a period of time and has become stable,
check the following:
S Compressor oil level. (Some scroll compressors do not have oil sight glasses.)
S Refrigerant sight glass for flashing
S Rotation of condenser fans
9. Complete the “Compressorized Equipment Warranty Form”.
IMM AGZ-7
AGZ 026B through 130B
59
Shutdown
Temporary
1. Put both circuit switches to the OFF position (Pumpdown and Stop).
2. After compressors have stopped, put System Switch (S1) to OFF (emergency stop).
3. Turn off chilled water pump. Chilled water pump to operate while compressors are
pumping down.
To start the chiller after a temporary shutdown, follow the start-up instructions.
Extended
1. Front seat both condenser liquid line service valves.
2. Put both circuit switches to the OFF position (Pumpdown and Stop position).
3. After the compressors have stopped, put System Switch (S1) to the OFF position
(emergency stop).
4. Front seat both refrigerant circuit discharge valves (if applicable).
5. If chilled water system is not drained, maintain power to the evaporator heater to
prevent freezing. Maintain heat tracing on the chilled water lines.
6. Drain evaporator and water piping to prevent freezing.
7. If electrical power to the unit is on, the compressor crankcase heaters will keep the
liquid refrigerant out of the compressor oil. This will minimize start-up time when
putting the unit back into service. The evaporator heater will be able to function.
8. If electrical power is off, make provisions to power the evaporator heater (if chilled
water system is not drained). Tag all opened electrical disconnect switches to warn
against start-up before the refrigerant valves are in the correct operating position.
At start-up, electrical power must be on for 24 hours before starting the chiller.
To start the chiller after an extended shutdown, follow the prestart-up and start-up
instructions.
Water Piping Checkout
1. Check the pump operation and vent all air from the system.
2. Circulate evaporator water, checking for proper system pressure and evaporator
pressure drop. Compare the pressure drop to the evaporator water pressure drop
curve.
3. Clean all water strainers before placing the chiller into service.
Refrigerant Piping Checkout
1. Check all exposed brazed joints for evidence of leaks. Joints may have been
damaged during shipping or when the unit was installed.
2. Check that all refrigerant valves are either opened or closed as required for proper
operation of the chiller.
3. A thorough leak test must be done using an approved electronic leak detector.
Check all valve stem packing for leaks. Replace all refrigerant valve caps and
tighten.
4. Check all refrigerant lines to insure that they will not vibrate against each other or
against other chiller components and are properly supported.
5. Check all flare connections and all refrigerant threaded connectors.
6. Look for any signs of refrigerant leaks around the condenser coils and for damage
during shipping or installation.
7. Leak detector is applied externally to refrigerant joints at the factory. Do not
confuse this residue with an oil leak.
8. Connect refrigerant service gauges to each refrigerant circuit before starting unit.
60
AGZ 026B through 130B
IMM AGZ-7
Electrical Check Out
CAUTION
Electrical power must be applied to the compressor crankcase heaters 24 hours
before starting unit to drive off refrigerant from the oil.
1. Open all electrical disconnects and check all power wiring connections. Start at
the power block and check all connections through all components to and including
the compressor terminals. These should be checked again after 3 months of
operation and at least yearly thereafter.
2. Check all control wiring by pulling on the wire at the spade connections and
tighten all screw connections. Check plug-in relays for proper seating and to
insure retaining clips are installed.
3. Put System Switch (S1) to the Emergency Stop position.
4. Put both circuit #1 & #2 switches to the Pumpdown and Stop position.
5. Apply power to the unit. The panel Alarm Light will stay on until S1 is closed.
Ignore the Alarm Light for the check out period. If you have the optional Alarm
Bell, you may wish to disconnect it.
6. Check at the power block or disconnect for the proper voltage and proper voltage
between phases. Check power for proper phasing using a phase sequence meter
before starting unit.
7. Check for 120Vac at the optional control transformer and at TB-2 terminal #1 and
the neutral block (NB).
8. Check between TB-2 terminal #7 and NB for 120Vac supply for transformer #2.
9. Check between TB-2 terminal #2 and NB for 120Vac control voltage. This
supplies the compressor crank case heaters.
10. Check between TB-3 terminal #17 and #27 for 24Vac control voltage.
Component Operation
Hot Gas Bypass (Optional)
This option allows the system to operate at lower loads without excessive on/off
compressor cycling. The hot gas bypass option is required to be on both refrigerant
circuits because of the lead / lag feature of the controller.
This option allows passage of discharge gas into the evaporator inlet (between the TX
valve and the evaporator) which generates a false load to supplement the actual chilled
water or air handler load.
Note: The hot gas bypass valve cannot generate a 100% false load.
The pressure regulating valve is a Sporlan SHGBE-8 and factory set to begin opening
at 69 psig and can be changed by changing the pressure setting. The adjustment range
is 0 to 100 psig. To raise the pressure setting, remove the cap on the bulb and turn the
adjustment screw clockwise. To lower the setting, turn the screw counterclockwise. Do
not force the adjustment beyond the range it is designed for, as this will damage the
adjustment assembly. The regulating valve opening point can be determined by slowly
reducing the system load while observing the suction pressure. When the bypass valve
starts to open, the refrigerant line on the evaporator side of the valve will begin to feel
warm to the touch.
IMM AGZ-7
AGZ 026B through 130B
61
The bypass valve includes a solenoid valve that is controlled by the MicroTech II
controller. It is active when the first stage of cooling on a circuit is active.
WARNING
The hot gas line may become hot enough to cause injury.
Be careful during valve checkout.
VFD Low Ambient Control (Optional)
The optional VFD fan control is used for unit operation below 35°F (2°C) down to a
minimum of 0°F (-17°C). The control looks at the saturated discharge temperature and
varies the fan speed to hold the temperature (pressure) at the “target” temperature.
This temperature is established as an input to a setpoint screen labeled “Sat Condenser
Temp Target”.
Filter-Driers
Each refrigerant circuit is furnished with a full flow filter drier (AGZ 026 – 070) or a
replaceable core type filter-drier (AGZ 075 – 130). The core assembly of the
replaceable core drier consists of a filter core held tightly in the shell in a manner that
allows full flow without bypass.
Pressure drop across the filter drier at full load conditions must not exceed 10 psig at
full load. See page 66 for maximum pressure drop at other load points. Replace the
filter drier if the pressure drop exceeds maximum.
WARNING
Pump out refrigerant before removing end flange for replacement of core(s) to
remove liquid refrigerant and lower pressure to prevent accidental blow off of
cover. EPA recovery regulations apply to this procedure.
A condenser liquid line service valve is provided for isolating the charge in the
condenser, but also serves as the point from which the liquid line can be pumped out.
With the line free of refrigerant, the filter-drier core(s) can be easily replaced.
System Adjustment
To maintain peak performance at full load operation, the system superheat and liquid
subcooling may require adjustment. Read the following subsections closely to
determine if adjustment is required.
Liquid Line Sight Glass
The color of the moisture indicator is an indication of the dryness of the system and is
extremely important when the system has been serviced. Immediately after the system
has been opened for service, the element may indicate a wet condition. It is
recommended that the equipment operate for about 12 hours to allow the system to
reach equilibrium before deciding if the system requires a change of drier cores.
Bubbles in the sight glass at constant full load indicates a shortage of refrigerant, a
plugged filter-drier, or a restriction in the liquid line. However, it is not unusual to see
bubbles in the sight glass during changing load conditions.
Refrigerant Charging
Liquid line subcooling at the liquid shut-off valve should be between 15 and 20 degrees
F at full load. If the unit is at steady full load operation and bubbles are visible in the
sight glass, then check liquid subcooling.
62
AGZ 026B through 130B
IMM AGZ-7
Thermostatic Expansion Valve
The expansion valve performs one specific function. It keeps the evaporator supplied
with the proper amount of refrigerant to satisfy the load conditions.
The sensing bulb of the expansion valve is installed in the closest straight run of
suction line from the evaporator. The bulb is held on by clamps around the suction line
and is insulated to reduce the effect of surrounding ambient temperatures. In case the
bulb must be removed, simply slit the insulation on each side of the bulb, remove the
clamps and then remove the capillary tubing that runs along the suction line from the
valve. The power element is removable from the valve body.
NOTE: Before adjusting superheat, check that unit charge is correct and liquid line sight
glass is full with no bubbles and that the circuit is operating under stable, full load
conditions.
The suction superheat for the suction leaving the evaporator is set at the factory for 8 to
12 degrees F at full load. To have full rated unit performance, the superheat must be
about 8 degrees F at 95°F outdoor ambient temperature.
Crankcase Heaters
The scroll compressors are equipped with externally mounted band heaters located at
the oil sump level. The function of the heater is to keep the temperature in the
crankcase high enough to prevent refrigerant from migrating to the crankcase and
condensing in the oil during off-cycle.
Power must be supplied to the heaters 24 hours before starting the compressors.
Evaporator
Models AGZ 026 through 070
The evaporator is a compact, high efficiency, single or dual circuit, brazed plate-toplate type heat exchanger consisting of parallel stainless steel plates.
The evaporator is protected with an electric resistance heater and insulated with 3/4"
(19mm) thick closed-cell polyurethane insulation. This combination provides freeze
protection down to -20°F (-29°C) ambient air temperature.
The water side working pressure is 363 psig (2503 kPa). Evaporators are designed and
constructed according to, and listed by, Underwriters Laboratories (UL).
Models AGZ 075 through 130
The evaporator is direct expansion, shell-and-tube type with water flowing in the
baffled shell side and refrigerant flowing through the tubes. Two independent
refrigerant circuits within the evaporator serve the unit's dual refrigerant circuits.
The evaporator is wrapped with an electric resistance heater cable and insulated with
3/4" (19mm) thick vinyl nitrate polymer sheet insulation, protecting against water
freeze-up at ambient air temperatures to -20°F (-29°C). An ambient air thermostat
controls the heater cable. The fitted and glued-in-place insulation has a K factor of
0.28 Btu in/hr ft2 °F at 75°F.
The refrigerant (tube) side maximum working pressure is 300 psig (2068 kPa). The
water side working pressure is 152 psig (1048 kPa). Each evaporator is designed,
constructed, inspected, and stamped according to the requirements of the ASME Boiler
and Pressure Vessel Code. Double thickness insulation is available as an option.
Phase Voltage Monitor (Optional)
Factory settings are as follows:
Voltage Setting, set at nameplate voltage.
IMM AGZ-7
AGZ 026B through 130B
Trip Delay Time, 2 seconds
Restart Delay Time, 60 seconds
63
Unit Maintenance
General
On initial start-up and periodically during operation, it will be necessary to perform
certain routine service checks. Among these are checking the liquid line sight glasses,
taking condensing and suction pressure readings, and checking to see that the unit has
normal superheat and subcooling readings. A recommended maintenance schedule is
located at the end of this section.
Compressor Maintenance
The scroll compressors are fully hermetic and require no maintenance other than
checking oil level.
Lubrication
No routine lubrication is required on AGZ units. The fan motor bearings are
permanently lubricated and no further lubrication is required. Excessive fan motor
bearing noise is an indication of a potential bearing failure.
Compressor oil should be standard refrigeration mineral oil such as Suniso 3GS.
Electrical Terminals
WARNING
Electric shock hazard. Turn off all power before continuing with following
service.
Condensers
The condensers are air-cooled and constructed of 3/8" (9.5mm) O.D. internally finned
copper tubes bonded in a staggered pattern into louvered aluminum fins. Maintenance
consists primarily of the routine removal of dirt and debris from the outside surface of
the fins and repairing any fin damage. McQuay recommends the use of foaming coil
cleaners available at most air conditioning supply outlets. Use caution when applying
such cleaners as they can contain potentially harmful chemicals. Care should be taken
not to damage the fins during cleaning. The coils should be thoroughly rinsed to
remove any cleaner residue.
If the service technician determines that the refrigerant circuit contains
noncondensables, recovery can be required, strictly following Clean Air Act
regulations governing refrigerant discharge to the atmosphere. The Schrader purge
valve is located on the vertical coil headers on both sides of the unit at the end opposite
the control box. Decorative panels cover the condenser coils and must be removed for
servicing. Recover with the unit off, after a shutdown of 15 minutes or longer, to allow
air to collect at the top of the coil. Restart and run the unit for a brief period. If
necessary, shut the unit off and repeat the procedure. Follow accepted environmentally
sound practices when removing refrigerant from the unit.
Optional High Ambient Control Panel
Consists of exhaust fan with rain hood, two inlet screens with filters, necessary
controls and wiring to allow operation to 125°F (52°C). The option can be factory or
field installed as a kit. Must be used for:
• It must be supplied on units operating at ambient temperatures above 105°F (40°C).
• It is automatically included on units with fan VFD (low ambient option).
• Check inlet filters periodically and clean as required. Verify that the fan is
operational.
64
AGZ 026B through 130B
IMM AGZ-7
Liquid Line Sight Glass
The refrigerant sight glasses should be observed periodically. (A weekly observation
should be adequate.) A clear glass of liquid indicates that there is subcooled refrigerant
charge in the system. Bubbling refrigerant in the sight glass, during stable run
conditions, indicates that the system can be short of refrigerant charge. Refrigerant gas
flashing in the sight glass could also indicate an excessive pressure drop in the liquid
line, possibly due to a clogged filter-drier or a restriction elsewhere in the liquid line.
See Table 39 for maximum allowable pressure drops. If subcooling is low, add charge
to clear the sight glass. If subcooling is normal (15 to 20 degrees F) and flashing is
visible in the sight glass, check the pressure drop across the filter-drier. Subcooling
should be checked at full load with 70°F (21.1°C) outdoor air temperature, stable
conditions, and all fans running.
An element inside the sight glass indicates the moisture condition corresponding to a
given element color. If the sight glass does not indicate a dry condition after about 12
hours of operation, the circuit should be pumped down and the filter-drier changed or
verify moisture content by performing an acid test on the compressor oil.
Preventive Maintenance Schedule
OPERATION
General
Complete unit log and review (Note 3)
Visually inspect unit for loose or damaged components
Inspect thermal insulation for integrity
Clean and paint as required
WEEKLY
Condenser (air-cooled)
Clean condenser coils (Note 4)
Check fan blades for tightness on shaft (Note 5)
Check fans for loose rivets and cracks
Check coil fins for damage
ANNUAL
(Note 2)
X
X
X
X
Electrical
Check terminals for tightness, tighten as necessary
Clean control panel interior
Visually inspect components for signs of overheating
Verify compressor heater operation
Test and calibrate equipment protection and operating controls
Megger compressor motor *
Refrigeration
Leak test
Check sight glasses for clear flow
Check filter-drier pressure drop (see manual for spec)
Perform compressor vibration test
Acid test oil sample
MONTHLY
(Note 1)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Notes:
1. Monthly operations include all weekly operations.
2. Annual (or spring start-up) operations includes all weekly and monthly operations.
3. Log readings can be taken daily for a higher level of unit observation.
4. Coil cleaning can be required more frequently in areas with a high level of airborne particles.
5. Be sure fan motors are electrically locked out.
* Never Megger motors while they are in a vacuum.
IMM AGZ-7
AGZ 026B through 130B
65
Service
WARNING
Service on this equipment is to be performed by qualified refrigeration
personnel familiar with equipment operation, maintenance, correct servicing
procedures, and the safety hazards inherent in this work. Causes for repeated
tripping of equipment protection controls must be investigated and corrected.
Disconnect all power before doing any service inside the unit.
Anyone servicing this equipment must comply with the requirements set forth
by the EPA in regards to refrigerant reclamation and venting.
Filter-Driers
A replacement of the filter-drier is recommended any time excessive pressure drop is
read across the filter-drier and/or when bubbles occur in the sight glass with normal
subcooling. The maximum recommended pressure drops across the filter-drier are as
follows:
Table 39, Filter-Drier Pressure Drop
PERCENT CIRCUIT
LOADING (%)
100%
75%
50%
25%
MAXIMUM RECOMMENDED PRESSURE
DROP ACROSS FILTER DRIER PSIG (KPA)
10 (69)
8 (55.2)
5 (34.5)
4 (27.6)
The filter-drier should also be changed if the moisture indicating liquid line sight glass
indicates excess moisture in the system.
During the first few months of operation the filter-drier replacement can be necessary if
the pressure drop across the filter-drier exceeds the values listed in the paragraph
above.
Any residual particles from the condenser tubing, compressor and
miscellaneous components are swept by the refrigerant into the liquid line and are
caught by the filter-drier.
Liquid Line Solenoid Valve
The liquid line solenoid valves that shut off refrigerant flow in the event of a power
failure do not normally require any maintenance. The solenoids can, however, require
replacement of the solenoid coil or of the entire valve assembly.
The solenoid coil can be checked to see that the stem is magnetized when energized by
touching a screwdriver to the top of the stem. If there is no magnetization, either the
coil is bad or there is no power to the coil.
The solenoid coil can be removed from the valve body without opening the refrigerant
piping after pumpdown. For personal safety, shut off and lock out the unit power.
The coil can then be removed from the valve body by simply removing a nut or snapring located at the top of the coil. The coil can then be slipped off its mounting stud for
replacement.
To replace the entire solenoid valve follow the steps involved when changing a filterdrier.
66
AGZ 026B through 130B
IMM AGZ-7
Evaporator
The evaporators are the direct expansion, shell-and-tube type with refrigerant flowing
through the tubes and water flowing through the shell over the tubes or stainless steel
brazed-plate type. The tubes are internally finned to provide extended surface as well
as turbulent flow of refrigeration through the tubes. Other than cleaning and testing, no
service work should be required on the evaporator.
Refrigerant Charging
AGZ air-cooled chillers are shipped factory charged with a full operating charge of
refrigerant but there can be times that a unit must be recharged at the job site. Follow
these recommendations when field charging. Refer to the unit operating charge found
in the Physical Data Tables.
Unit charging can be done at any steady load condition (preferably at 75 to 100% load)
and at any outdoor temperature (preferably higher than 70°F (21.1°C). Unit must be
allowed to run 5 minutes or longer so that the condenser fan staging is stabilized at
normal operating discharge pressure. For best results, charge with two or more
condenser fans operating on each refrigerant circuit.
The AGZ units have a condenser coil design with approximately 15% of the coil tubes
located in a subcooler section of the coil to achieve liquid cooling to within 5°F (3°C)
of the outdoor air temperature when all condenser fans are operating. This is equal to
15°F to 20°F (8.3°C to 11.1°C) subcooling below the saturated condensing temperature
when the pressure is read at the liquid valve between the condenser coil and the liquid
line filter-drier. Once the subcooler is filled, extra charge will not lower the liquid
temperature and does not help system capacity or efficiency.
One of the following three scenarios will be experienced with an undercharged
unit:
1. If the unit is slightly undercharged, the unit will show bubbles in the sight glass.
Recharge the unit as described in the charging procedure below.
2. If the unit is moderately undercharged, it will normally trip on freeze protection.
Recharge the unit as described in the charging procedure below. However,
freezestat trips can also be an indication of low flow or poor heat transfer due to
tube fouling. Anti-freeze solutions can also cause freezestat trips.
3. If the unit is severely undercharged, the unit will trip due to lack of liquid flow to
the expansion valve. In this case either remove the remaining charge by means of a
proper reclamation system and recharge the unit with the proper amount of
refrigerant as stamped on the unit nameplate, or add refrigerant through the suction
valve on the compressor. If the unit is severely undercharged, the unit can nuisance
trip during this charging procedure. If this happens, operate the unit at minimum
load, adding charge until the sight glass is clear. Once the unit has enough charge
so that it does not trip out, continue with step 2 of the charging procedure below.
IMM AGZ-7
AGZ 026B through 130B
67
Procedure to charge a moderately undercharged AGZ unit:
1. If a unit is low on refrigerant, you must first determine the cause before attempting
to recharge the unit. Locate and repair any refrigerant leak. Evidence of oil is a
good indicator of leakage, however, oil may not be visible at all leaks. Liquid leak
detector fluids work well to show bubbles at medium size leaks but electronic leak
detectors can be needed to locate small leaks.
2. Add the charge to the system through the suction shutoff valve or through the
Schrader fitting on the tube entering the evaporator between the compressor and
the evaporator head.
3. The charge can be added at any load condition between 25-100% load per circuit
but at least two fans should be operating per refrigerant circuit, if possible. The
suction superheat should be in the 8 to 12 degree F (4.4°C-6.6°C) range.
4. Add sufficient charge to clear the liquid line sight glass and until all flashing stops
in the sight glass.
5. Check the unit subcooling value by reading the liquid line pressure and
temperature at the liquid line near the filter-drier. The subcooling values should be
between 15 and 20 degrees F (8.3 and 11.1 degrees C).
6. With outdoor temperatures above 60°F (15.6°C), all condenser fans should be
operating and the liquid line temperature should be within 5°F to 10°F (2.8°C to
5.6°C) of the outdoor air temperature. At 25-50% load, the liquid line temperature
should be within 5°F (2.8°C) of outdoor air temperature with all fans on. At 75100% load the liquid line temperature should be within 10°F (5.6°C) of outdoor air
temperature with all fans on.
7. Overcharging of refrigerant will raise the compressor discharge pressure due to
filling of the condenser tubes with excess refrigerant.
Warranty Statement
Limited Warranty
Consult your local McQuay Representative for warranty details. Refer to Form 93343285Y. To find your local McQuay Representative, go to www.mcquay.com.
68
AGZ 026B through 130B
IMM AGZ-7
AGZ Troubleshooting Chart
PROBLEM
Compressor Will
Not Run
Compressor
Noisy Or Vibrating
High Discharge
Pressure
Low Discharge
Pressure
High Suction
Pressure
Low Suction
Pressure
Compressor Will
Not Stage Up
Compressor
Staging Intervals
Too Short
IMM AGZ-7
POSSIBLE CAUSES
1.
Main switch.
2.
Fuse blown. circuit breakers open
3.
Thermal overloads tripped
4.
Defective contactor or coil.
POSSIBLE CORRECTIVE STEPS
1.
2.
3.
4.
5.
5.
System shutdown by equipment protection devices
6.
7.
8.
No cooling required
Liquid line solenoid will not open
Motor electrical trouble
9.
Loose wiring
1.
2.
3.
4.
5.
Low or no refrigerant charge
Compressor running in reverse
Improper piping support on suction or discharge
Worn compressor isolator bushing
Worn Compressor
1.
Noncondensables in system
2.
3.
4.
5.
6.
7.
System overcharged with refrigerant
Optional discharge shutoff valve partially closed
FanTrol wiring not correct
Fan not running
Dirty condenser coil
Air recirculation
2.
3.
4.
5.
6.
7.
1.
Refrigerant flood back
2.
Wind blowing into coil at low ambient
1.
2.
3.
4.
5.
Faulty condenser temperature regulation
Insufficient refrigerant in system
Low suction pressure
6.
Only one compressor operating
1.
2.
3.
4.
Excessive water temperature
Excessive load
Expansion valve overfeeding
Compressors running in reverse
1.
2.
3.
4.
1.
Rapid load swings
1.
2.
6.
7.
8.
9.
1.
2.
3.
4.
5.
1.
3.
4.
5.
6.
Close switch.
Check electrical circuits and motor windings for
shorts or grounds. Investigate for possible
overloading. Replace fuse or reset breakers after
fault is corrected. Check for loose or corroded
connections.
Overloads are auto-reset. Check unit closely when
unit comes back on line. Allow time for auto-reset.
Repair or replace
Determine type and cause of shutdown and correct
it before resetting equipment protection switch.
None. Wait until unit calls for cooling.
Repair or replace solenoid coil. Check wiring.
Check motor for opens, shorts, or burnout.
Check all wire junctions. Tighten all terminal
screws.
Repair and recharge
Check unit and compressor for correct phasing
Relocate, add, or remove hangers
Replace
Replace
Extract the noncondensables with approved
procedures.
Remove excess, check liquid subcooling.
Open valve.
Check FanTrol wiring.
Check electrical circuit, Check fan motor.
Clean coil.
Correct.
Correct.
Shield coil from direct wind, Wind guards are
available.
Check condenser control operation.
Check for leaks. Repair and add charge.
See corrective steps for Low Suction Pressure.
See corrective steps for Compressor Will Not Stage
Up.
Check control settings.
Reduce load or add additional equipment.
Check remote bulb. Regulate superheat.
Check for proper phasing.
9.
Evaporator dirty
10. Rapid load swings
Stabilize load.
Check for leaks, repair, add charge. Check liquid
sight glass.
3.
Check pressure drop across filter drier. Replace.
4.
Check and reset for proper superheat.
5.
Check means for regulating condenser
temperature.
6.
See corrective steps for Compressor Staging
Intervals Too Low.
7.
Adjust flow.
8.
Take pressure drop across vessel and contact
factory to obtain design pressure drop for that
vessel.
9.
Clean chemically.
10. Stabilize load.
1.
2.
1.
2.
2.
Lack of refrigerant
3.
4.
Clogged liquid line filter drier
Expansion valve malfunctioning
5.
Condensing temperature too low
6.
Compressor will not unload
7.
Insufficient water flow
8.
Evaporator head ring gasket slippage
Defective capacity control
Faulty thermostat stage or broken wire
Replace.
Replace.
3.
Stages not set for application
3.
Reset thermostat setting for application.
1.
2.
Thermostat control band not set properly
Faulty water temperature sensor
1.
2.
Set control band wider.
Replace.
3.
4.
Insufficient water flow
Rapid load swings
3.
4.
Adjust flow.
Stabilize load.
AGZ 026B through 130B
69
PROBLEM
Compressor Oil
Level Too High
Or Too Low
Compressor
Loses Oil
Motor Overload
Relays or Circuit
Breakers Open
Compressor
Thermal
Protection Switch
Open
70
POSSIBLE CAUSES
POSSIBLE CORRECTIVE STEPS
1.
2.
3.
4.
5.
6.
Oil hang-up in piping
Low oil level
Loose fitting on oil line
Level too high
Insufficient water flow - Level too high
Excessive liquid in crankcase - Level too high
1.
2.
3.
4.
5.
6.
7.
Short cycling
7.
Review refrigerant piping and correct.
Check and add oil.
Check and tighten system.
Adjust thermal expansion valve.
Adjust flow.
Check crankcase heater. Reset expansion valve
for higher superheat. Check liquid line solenoid
valve operation.
Stabilize load or increase staging interval.
1.
2.
Lack of refrigerant
Suction superheat too high
1.
2.
Check for leaks and repair. Add refrigerant
Adjust superheat.
3.
Crankcase heater burnout
3.
Replace crankcase heater.
1.
2.
Low voltage during high load conditions
Defective or grounded wiring in motor
1.
2.
Check supply voltage for excessive line drop.
Replace compressor motor.
3.
4.
5.
Loose power wiring or burnt contactors
High condenser temperature
Power line fault causing unbalanced voltage
3.
4.
5.
1.
Operating beyond design conditions
1.
2.
3.
4.
5.
6.
Discharge valve partially shut
Blown compressor internal gasket
Voltage range or imbalance
High superheat
Compressor bearing failure
2.
3.
4.
5.
6.
Check all connections and tighten.
See corrective steps for High Discharge Pressure.
Check supply voltage. Notify power company. Do
not start until fault is corrected..
Add facilities so conditions are within allowable
limits.
Open valve.
Replace gasket.
Check and correct.
Adjust to correct superheat.
Replace compressor .
AGZ 026B through 130B
IMM AGZ-7
This document contains the most current product information as of this printing. For the most up-todate product information, please go to www.mcquay.com.
Post Office 2510, Staunton, Virginia 24402 USA • (800) 432-1342 • www.mcquay.com
IMM AGZ-7 (2/05)