Installation Manual
IM ALR
Packaged Air-Cooled Water Chiller
ALR 110E - ALR 185E
Refrigerant R-22, 60 Hertz
Group:
Part Number:
Effective:
Supersedes:
Chiller
November 1997
074653001
IM 676
© 1997 McQuay International
Table of Contents
Introduction...............................................................................................................3
General Description............................................................................................................................... 3
Inspection..............................................................................................................................................3
Installation............................................................................................................................................. 3
Handling................................................................................................................................................3
Location................................................................................................................................................. 4
Service Access.......................................................................................................................................5
Vibration Isolators.................................................................................................................................6
Water Piping..........................................................................................................................................7
Flow Switch...........................................................................................................................................8
Water Connections.................................................................................................................................8
Refrigerant Charge ................................................................................................................................9
Glycol Solutions....................................................................................................................................9
Evaporator Water Flow and Pressure Drop.........................................................................................11
Physical Data ...........................................................................................................12
Electrical Data......................................................................................................... 15
Field Wiring.........................................................................................................................................15
Dimensional Data.................................................................................................... 24
Unit Layout and Principles of Operation..............................................................25
Control Center.....................................................................................................................................25
Start-up and Shutdown .......................................................................................... 27
Pre Start-up.......................................................................................................................................... 27
Start-up................................................................................................................................................27
Sequence of Operation ........................................................................................................................ 28
"McQuay" is a registered trademarks of McQuay International
"Illustrations cover the general appearance of McQuay International products at the time of publication and we reserve the right to make changes in design and
2
1997 McQuay International
construction at anytime without notice"
ALR 110E through 185E IM ALR
Introduction
General Description
McQuay air-cooled 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, multiple accessible hermetic compressors, 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 double
diaphragm hydraulic element thermal expansion valves. Other features include compressor crankcase
heaters, an evaporator heater for chilled water freeze protection, limited pumpdown during “on” or
“off” periods, compressor lead-lag switch to alternate the compressor starting sequence, and
sequenced starting of compressors.
automatic operation. Condenser fan motors are fused in all three phases and started by their own
three-pole contactors. Compressors are not fused but may be protected by optional circuit breakers,
or by a field installed fused disconnect.
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 name plate before unloading,
making certain it agrees with the power supply available. McQuay is not responsible for physical
damage after unit leaves the factory.
The electrical control center includes all safety and operating controls necessary for dependable
Note:
Unit shipping and operating weights are available in the Physical Data tables
beginning on page 12.
Installation
Note:
Installation is to be performed by qualified personnel who are familiar with local codes
and regulations.
WARNING
Sharp edges and coil surfaces are a potential hazard. Avoid contact with them.
Handling
Be careful to avoi d 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 holes are provided in the base o f the unit.
Arrange spreader bars and cables to prevent damage to the condenser coils or cabinet (see Figure 2).
IM ALR ALR110E through 185E
3
Figure 1, Suggested pushing arrangement
co
ocation)
Figure 2, Suggested lifting arrangement
Spreader bars
recommended
(Use Caution)
Blocking required
across full width
NOTE: Number of fans can vary
from this diagram. Lifting method
remains the same.
Must use these rigging
holes. (Be aware of
ntrol box l
Location
Unit Placement
ALR units are for outdoor applications and can be mounted on a roof or ground level. Set units on a
solid and level foundation. For roof mounted applications, install the unit on a steel channel or Ibeam frame to support the unit above the roof. For ground level applications, install the unit on a
substantial base that will not settle. A one piece concrete slab with footings extended below the frost
line is recommended. Be sure the foundation is level (within 1/2” [13 mm] over its length and width).
The foundation must support the operating weights listed in the Physical Data tables beginning on
page 12.
On ground level app lications protect fins against vandalism using the optional coil guards or by
erecting a screen fence. The fence must allow free flow of air to the condenser coil for proper unit
operation.
4
ALR 110E through 185E IM ALR
Clearances
The flow of air to and from the condenser coil must not be limited. Restricting air flow or allowing
air recirculation will result in a decrease in unit performance and efficiency. 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 prope ller type and will not operate
with ductwork on the fan outlet.
Install the unit with enough side clearance for air entrance to the coil and for servicing. Provid e
service access to the evaporator, compressors, electrical control panel and piping components as
shown in Figure 3.
Do not allow debris to accumulate near the unit. Air movement may draw debris into the
condenser coil causing air starvation. Give special consideration to low ambient operation where
snow can accumulate. Keep condenser coils and fan discharge free of snow or other obstructions to
permit adequate airflow.
Figure 3, Clearance requirements
5 ft. (1524mm) Clearance for
air inlet
4 Ft.
(1220mm)
clearance for
5 Ft. (1524mm) clearance for
air inlet
"10 feet (3048)
for evaporator
tube removal
Sound Isolation
The ultra-low sound levels of the ALR reciprocating
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 thr ough electrical
conduit. Spring isolators are effective in reducing the
low amplitude sound generated by reciprocating
compressors and for unit isolation in sound sensitive
areas.
Service Access
Each end of the unit must be accessible after installation for periodic service. Compressors, filterdriers, and manual liquid line shutoff valves are accessible on each side of the unit adjacent to the
control box. High pressure, low pressure, and motor protector controls are on the compressor.
Freezestats and cooler barrel thermostats are near the cooler. Most other operational, safety and
starting controls are located in the unit control box.
The condenser fan and motors can be removed from the top of the unit.
IM ALR ALR110E through 185E
5
Vibration Isolators
Vibration isolators are recommended for all roof mounted installations or wherever vibration
transmission is a consideration. Table 1 lists isolator loads and type. Table 2 lists spring isolator part
numbers for all unit sizes. See Dimensional Data beginning on page 24 for dimensions required to
secure each isolator to the mounting surface.
Table 1, Isolator Loads and Type
ALR ISOLATOR LOADS AND TYPE FOR EACH MOUNTING LOCATION
UNIT R S T
SIZE TYPE LB KG TYPE LB KG TYPE LB KG
110E CP-2-28 1339 607 CP-2-28 1364 619 CP-2-31 1697 770
120E CP-2-31 1362 618 CP-2-31 1490 676 CP-2-32 1748 793
130E CP-2-31 1492 677 CP-2-32 1570 712 CP-2-32 1838 834
135E CP-2-31 1506 683 CP-2-32 1670 758 CP-2-32 1904 864
140E CP-2-31 1556 706 CP-2-32 1752 795 CP-2-32 1912 867
145E CP-2-31 1572 713 CP-2-32 1680 762 CP-4-27 2093 949
150E CP-2-32 1601 726 CP-2-32 1704 773 CP-4-27 2120 962
160E CP-4-27 1948 884 CP-2-32 1962 890 CP-2-32 1848 838
170E CP-4-27 2052 931 CP-2-32 2002 908 CP-2-32 1849 839
180E CP-4-27 2052 931 CP-2-32 2002 908 CP-2-32 1849 839
185E CP-4-27 2052 931 CP-2-32 2002 908 CP-2-32 1849 839
Two of each isolator type is required for a total of six per unit.
NOTE:
Table 2, Spring Flex Isolator Part Numbers
TYPE COLOR McQuay Each
Part No. Lb. KG
CP1-25 Red 477927A-25 450 204
CP1-26 Purple 477927A-26 600 272
CP1-27 Orange 477927A-27 750 340
CP1-28 Green 477927A-28 900 408
CP1-31 Gray 477927A-31 1100 499
CP1-32 White 477927A-32 1300 590
CP2-25 Red 477929A-25 900 408
CP2-26 Purple 477929A-26 1200 544
CP2-27 Orange 477929A-27 1500 681
CP2-28 Green 477929A-28 1800 817
CP2-31 Gray 477929A-31 2200 998
CP2-32 White 477929A-32 2600 1180
CP4-26 Purple 580513A-26 2400 1089
CP4-27 Orange 580513A-27 3000 1361
CP4-28 Green 580513A-28 3600 1633
CP4-31 Gray 580513A-31 4400 1996
CP4-32 White 580513A-32 5200 2359
Max. Load
6
ALR 110E through 185E IM ALR
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. Consider
the following when installing water piping:
1. Vibration eliminators to reduce vibration and noise transmission to the building.
2. Shutoff valves to isolate the unit from the piping system during unit servicing.
3. Manual or automatic air vent valves at the high points of the system. Install drains at the lowest
points in the system.
4. A means of maintaining adequate system water pressure (expansion tank or regulating valve).
5. Temperature and pressure indicators located at the unit to aid in unit servicing.
6. A strainer or other means of removing foreign matter from the water before it enters the pump.
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. Place a strainer in the water line just before the inlet of the evaporator. This will help prevent
foreign material from entering and decreasing the performance of the evaporator.
CAUTION
If separate disconnect is us ed for the 110V supply to the evaporator heating cable, m ark the
disconnect clearly to ensure disconnect is not accidentally shut off during cold seasons.
8. The shell-and-tube evaporator has a thermostat and heating cable to prevent freeze-up down to 20°F (-29°C). It is suggested that the he a ting cable be wired to a separate 110V 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.
9. If the unit is used as a replacement chiller on a previously existing piping system, flush the
system thoroughly before unit installation. Regular water anal ysis and che mical water tre atment
on the evaporator is recommended immediately at equipment start-up.
10. The total water volume in the system should be sufficient to prevent frequent “on-off” cycling.
Turnover rate should not be less than 15 minutes for normal variable cooling loads. Turnover
rate for process cooling or a constant load, should not be less than 6 minutes.
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. Reset the freezestat and low leaving water alarm
temperatures. The freezestat is factory set to default at 36°F (2.2°C). Reset the freezestat setting
to approximately 4 to 5 degrees F (2.3 to 2.8 degrees C) belo w the leaving chilled water setpoint
temperature. See the section titled “Glycol Solutions” for additional information concerning
glycol.
12. Perform a preliminary leak check before insulating the piping and filling the system.
13. Piping insulation should include a vapor barrier to prevent condensation and possible damage to
the building structure.
IM ALR ALR110E through 185E
7
Figure 4, Typical field evaporator water piping
Vent
Outlet
Valved
pressure
gauge
Vibration
Eliminator
Flow
Switch
Balancing
valve
Gate valve
Protect all field piping
against freezing
Drain
Vibration
Eliminator
Water
strainer
Gate valve
Flow Switch
Mount a water flow switch in either the entering or leaving water line to shut down the unit when
water flow is interrupted.
A flow switch is available from McQuay (part number 00175033-00). It is a “paddle” type
switch and adaptable to any pipe size from 3” (76mm) to 8” (203mm) nominal. Certain minimum
flow rates are required to close the switch and are listed in Table 3. Installation should be as shown in
Figure 5. Connect the normally open contacts of the flow switch in the unit control center at terminals
5 and 6. 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.
NOTE:
Differential pressure switches are not recommended for outdoor installation.
Table 3, Flow switch minimum flow rates
NOMINAL PIPE SIZE MINIMUM REQUIRED FLOW TO
INCHES (MM) ACTIVATE SWITCH - GPM (L/s)
1 (25.4) 6.00 (0.38)
11/4 (31.8) 9.80 (0.62)
11/2 (38.1) 12.70 (0.80)
2 (50.8) 18.80 (1.20)
21/2 (63.50) 24.30 (1.50)
3 (76.20) 30.00 (1.90)
4 (101.6) 39.70 (2.50)
5 (127.0) 58.70 (3.70)
6 (152.4) 79.20 (5.00)
Figure 5, Flow switch installation
Flow direction marked
on switch
1" (25mm) NPT flow
switch connection
Tee
5" (127mm) pipe dia.
Min. after switch
8
ALR 110E through 185E IM ALR
5" (127mm) pipe dia.
Min. before switch
The procedure
Note:
does not specify the
type of glycol. Use
the derate factors
found in Table 4 for
corrections when
using ethylene glycol
and those in Table 5
for propylene glycol.
Water Connections
Bring water piping to the Evaporator from the bottom of the unit or through the side between the
vertical supports.
Note:
On units sizes 160E through 185E there is a diagonal bracket off of a vertical support
which will interfere with the water connection if brought in from the side. This brace can be
removed, but only after the unit is in place.
Refrigerant Charge
All units are designed for use with HCFC-22 are shipped with an operating charge. The operating
charge (using HCFC-22) for each unit is shown in the Physical Data tables beginning on page 12.
Glycol Solutions
The system glycol capacity, glycol solution flow rate in GPM, and pressure dr op through the cooler
may be calculated using the following formulas and table.
1.
Capacity --
capacity correction factor C.
2.
Flow
Glycol GPM (from table)
For Metric Applications
and kW:
Glycol L / s (from table)
3.
Pressure drop
the water pressure drop curve on page 11 at the actual glycol GPM. Multiply the water pressure
drop by PD correction factor from Table 4 or Table 5 to obtain corrected glycol pressure drop.
4. To determine the unit's power consumption when using glycol, multiply the water system kW by
factor kW.
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.
On glycol applications it is normally recommended by the supplier that a minimum of 25% solution
by weight be used for protection against corrosion.
Find the reduced capacity by multiplying the chiller capacity with water by the
-- To determine evaporator gpm (or Delta-T) knowing Delta-T (or gpm) and capacity:
×
24 capacity glycol
=
()
−
Delta T
×
G
-- To determine evaporator L/s (or Delta-T) knowing Delta-T (or L/s)
=
kW
×−
Delta T
4.18
×
Flow
-- To determine pressure drop through the evaporator, when using glycol, enter
IM ALR ALR110E through 185E
9
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 4, Ethylene glycol
% Freeze Point
E.G. °F °C Cap. kW GPM PD
10 26 -3 0.991 0.996 1.013 1.070
20 18 -8 0.982 0.992 1.040 1.129
30 7 -14 0.972 0.986 1.074 1.181
40 -7 -22 0.961 0.976 1.121 1.263
50 -28 -33 0.946 0.966 1.178 1.308
Table 5, Propylene glycol
% Freeze Point
P.G. °F °C Cap. kW GPM PD
10 26 -3 0.987 0.992 1.010 1.068
20 19 -7 0.975 0.985 1.028 1.147
30 9 -13 0.962 0.978 1.050 1.248
40 -5 -21 0.946 0.971 1.078 1.366
50 -27 -33 0.929 0.965 1.116 1.481
Table 6, Capacity and power derates
Chilled Water Fouling Factor
ALTITUDE °F °C Cap. kW Cap. kW Cap. kW
SEA 10 5.6 1.000 1.000 0.975 0.986 0.919 0.939
LEVEL 12 6.7 1.005 1.002 0.980 0.989 0.923 0.941
2000 feet 12 6.7 0.992 1.011 0.970 0.998 0.914 0.949
4000 feet 12 6.7 0.978 1.025 0.956 1.008 0.904 0.958
6000 feet 12 6.7 0.963 1.034 0.942 1.017 0.895 0.966
Delta-T 0.00025 (0.044) 0.00075 (0.132) 0.00175 (0.308)
6 3.3 0.992 0.995 0.996 0.982 0.911 0.935
8 4.4 0.995 0.997 0.969 0.984 0.914 0.937
14 6.8 1.010 1.005 0.985 0.991 0.928 0.943
16 8.9 1.014 1.007 0.989 0.993 0.930 0.944
6 3.3 0.978 1.005 0.957 0.990 0.903 0.943
8 4.4 0.982 1.007 0.961 0.993 0.905 0.945
10 5.6 0.986 1.009 0.965 0.995 0.909 0.947
14 6.8 0.997 1.014 0.973 1.001 0.919 0.952
16 8.9 1.000 1.016 0.975 1.002 0.921 0.953
6 3.3 0.966 1.016 0.944 0.999 0.894 0.951
8 4.4 0.969 1.018 0.947 1.001 0.896 0.953
10 5.6 0.973 1.021 0.952 1.005 0.900 0.956
14 6.8 0.982 1.027 0.959 1.011 0.909 0.960
16 8.9 0.986 1.028 0.961 1.015 0.911 0.961
6 3.3 0.953 1.025 0.930 1.009 0.884 0.961
8 4.4 0.955 1.028 0.934 1.011 0.887 0.962
10 5.6 0.959 1.031 0.939 1.013 0.890 0.964
14 6.8 0.968 1.036 0.946 1.020 0.899 0.968
16 8.9 0.972 1.037 0.949 1.024 0.902 0.969
10
ALR 110E through 185E IM ALR
Evaporator Water Flow and Pressure Drop
Evaporator flow rate must fall between the minimum and maximum values shown in the evaporator
pressure drop curve. Flow rates below the minimum values will result in laminar flow which will
reduce efficiency, cause erratic operation of the expansion valve and could cause low temperature
cutouts. Flow rates exceeding the maximum values can cause erosion on the evaporator water
connections and tubes.
Measure the chilled water pressure drop through the evaporator at field installed pressure taps. It
is important not to include the effect of valves or strainers in these readings.
Va rying chilled water flow through the evaporator while the compre ssor(s) are oper ating is not
recommended.
Figure 6, Evaporator water pressure drop curve
IM ALR ALR110E through 185E
11
Physical Data
Table 7 , Physical Data ALR 110E through 135E
PHYSICAL DATA
110E 120E 130E 135E
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW) 107.8 (379.0) 120.7 (424.4) 130.6 (459.2) 135.5 (476.4)
Number Of Refrigerant Circuits 2 2 2 2
Unit Operating Charge, R-22, Lb. 87 87 90 90 120 120 120 120
Unit Operating Charge, R-22, (kg) (36.3) (36.3) (36.3) (36.3) (38.6) (38.6) (38.6) (38.6)
Cabinet Dimensions, LxWxH, In. 229 x 83 x 89 229 x 83 x 89 229 x 83 x 93 229 x 83 x 93
Cabinet Dimensions, LxWxH, (mm) (5809 x 2118 x 2369) (5809 x 2118 x 2369) (5809 x 2118 x 2369) (5809 x 2118 x 2369)
Unit Operating Weight, Lbs. (kg) 8800 (3992) 9200 (4173) 9800 (4445) 10160 (4609)
Unit Shipping Weight, Lbs. (kg) 8505 (3858) 8760 (3974) 9350 (4241) 9735 (4416)
Add'l Weight If Copper Finned Coils, Lbs. (kg) 1105 (501) 1105 (501) 1652 (750) 1652 (750)
COMPRESSORS
Type Semi-Hermetic Semi-Hermetic Semi-Hermetic Semi-Hermetic
Nominal Horsepower 30-30 30-35 30-35 35-35 35-35 35-35 35-40 35-40
Number Of Cylinders Per Compressor 6 - 6 6 - 6 6 - 6 6 - 6 6 - 6 6 - 6 6 - 6 6 - 6
Oil Charge Per Compressor, Oz. 140 - 140 140 - 140 140 - 140 140 - 140 140 - 140 140 - 140 140 - 255 140 - 255
Oil Charge Per Compressor, (g) (3969 -
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Standard Staging - Circuit #1 in Lead
Standard 6 Stages 0-16-32-40-48-71-100 0-15-32-39-48-74-100 0-17-33-42-50-75-100 0-16-32-40-48-74-100
Standard Staging - Circuit #2 in Lead
Standard 6 Stages 0-16-32-40-48-76-100 0-17-32-41-48-76-100 0-17-33-42-50-75-100 0-16-32-40-48-74-100
Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2
3969)
(3969 -
3969)
(3969 -
3969)
ALR MODEL NUMBER
(3969 -
3969)
(3969 -
3969)
(3969 -
3969)
(3969 -
7229)
(3969 -
7229)
Optional Staging - Circuit #1 in Lead
Optional 8 Stages 0-16-32-40-48 0-15-32-39-48 0-17-33-42-50 0-16-32-40-48
Optional Staging - Circuit #2 in Lead
Optional 8 Stages 0-16-32-40-48 0-17-32-41-48 0-17-33-42-50 0-16-32-40-48
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area,Sq. Ft. 115.6 115.6 115.6 115.6 115.6 115.6 115.6 115.6
Coil Face Area, (M2) (10.3) (10.3) (10.3) (10.3) (10.3) (10.3) (10.3) (10.3)
Finned Height x Finned Length, In. 80 x 208 80 x 208 80 x 208 80 x 208 80 x 208 80 x 208 80 x 208 80 x 208
Finned Height x Finned Length, (mm) (2032 x
Fins Per Inch x Rows Deep 16 x 2 16 x 2 16 x 2 16 x 2 16 x 3 16 x 3 16 x 3 16 x 3
Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm) 10 - 28 (711) 10 - 28 (711) 12 - 28 (711) 12 - 28 (711)
Number Of Motors - HP (kW) 10 - 1.5 (1.1) 10 - 1.5 (1.1) 12 - 1.5 (1.1) 12 - 1.5 (1.1)
Fan And Motor RPM, 60/50Hz 1100/915 1100/915 1100/915 1100/915
60 Hz Fan Tip Speed, FPM 8063 8063 8063 8063
60 Hz Total Unit Airflow, CFM 94710 94710 108240 108240
DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND THRU-TUBE
Diameter, in. - Length, Ft. 14 - 10 16 - 10 16 - 10 16 - 10
Diameter, (mm) - Length, (mm) (356 - 3048) (406 - 3048) (406 - 3048) (406 - 3048)
Water Volume, Gallons, (L) 36.10 (136.6) 43.6 (165) 43.6 (165) 43.6 (165)
Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207) 175 (1207)
Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552) 225 (1552)
Water Inlet / Outlet Victaulic Connections, In. (mm) 6 (152.4) 6 (152.4) 6 (152.4) 6 (152.4)
Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5)
Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5)
NOTE:
1. Nominal capacity based on 95F ambient air and 54F/44F water range.
-64-84-92-100 -67-84-91-100 -67-83-92-100 -66-84-92-100
-68-84-92-100 -65-84-91-100 -67-83-92-100 -66-84-92-100
5283)
(2032 x
5283)
(2032 x
5283)
(2032 x
5283)
(2032 x
5283)
(2032 x
5283)
(2032 x
5283)
(2032 x
5283)
12
ALR 110E through 185E IM ALR
Table 8, Physical Data ALR 140E through 160E
PHYSICAL DATA
140E 145E 150E 160E
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW) 139.7 (491.2) 144.7 (508.8) 149.9 (527.0) 157.8 (554.8)
Number Of Refrigerant Circuits 2222
Unit Operating Charge, R-22, Lbs 125 125 130 130 130 130 140 140
Unit Operating Charge, R-22, (kg) (45.4) (45.4) (45.4) (45.4) (45.4) (45.4) (49.9) (49.9)
Cabinet Dimensions, LxWxH, In. 229 x 83 x 93 229 x 83 x 93 229 x 83 x 93 263 x 83 x 93
Cabinet Dimensions, LxWxH, (mm) (5809 x 2118 x 2369) (5809 x 2118 x 2369) (5809 x 2118 x 2369) (6690 x 2118 x 2369)
Unit Operating Weight, Lbs. (kg) 10440 (4736) 10690 (4849) 10850 (4922) 11515 (5223)
Unit Shipping Weight, Lbs. (kg) 10040 (4554) 10290 (4668) 10450 (4740) 11115 (5042)
Add'l Weight If Copper Finned Coils, Lb. (kg) 1652 (750) 1652 (750) 1652 (750) 1930 (876)
COMPRESSORS
Type Semi-Hermetic Semi-Hermetic Semi-Hermetic Semi-Hermetic
Nominal Horsepower 40-40 40-40 40-40 40-40 40-40 40-50 40-50 40-50
Number Of Cylinders Per Compressor 6 - 6 6 - 6 6 - 6 6 - 6 6 - 6 6 - 8 6 - 8 6 - 8
Oil Charge Per Compressor, Oz. 255 - 255 255 - 255 255 - 255 255 - 255 255 - 255 255 - 255 255 - 255 255 - 255
Oil Charge Per Compressor, (g) (7229 -
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Standard Staging - Circuit #1 in Lead
Standard 6 Stages (N/A on MicroTech Units) 0-17-33-42-50-75-100 0-17-33-42-50-75-100 0-15-32-40-48-72-100 0-17-33-42-50-77-100
Standard Staging - Circuit #2 in Lead
Standard 6 Stages (N/A on MicroTech Units) 0-17-33-42-50-75-100 0-17-33-42-50-75-100 0-15-32-40-48-76-100 0-17-33-42-50-77-100
Optional Staging - Circuit #1 in Lead
Optional 8 Stages (Std. on MicroTech Units) 0-17-33-42-50 0-17-33-42-50 0-15-32-40-64 0-17-33-42-50
Optional Staging - Circuit #2 in Lead
Optional 8 Stages (Std. on MicroTech Units) 0-17-33-42-50 0-17-33-42-50 0-15-32-40-48 0-17-33-42-50
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area,Sq. Ft. 115.6 115.6 115.6 115.6 115.6 115.6 135 135
Coil Face Area, (M2) (10.3) (10.3) (10.3) (10.3) (10.3) (10.3) (12.5) (12.5)
Finned Height x Finned Length, In. 80 x 208 80 x 208 80 x 208 80 x 208 80 x 208 80 x 208 80 x 243 80 x 243
Finned Height x Finned Length, (mm) (2032 x
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
Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm) 12 - 28 (711) 12 - 28 (711) 12 - 28 (711) 14 - 28 (711)
Number Of Motors - HP (kW) 12 - 1.5 (1.1) 12 - 1.5 (1.1) 12 - 1.5 (1.1) 14 - 1.5 (1.1)
Fan And Motor RPM, 60/50Hz 1100/915 1100/915 1100/915 1100/915
60 Hz Fan Tip Speed, FPM 8063 8063 8063 8063
60 Hz Total Unit Airflow, CFM 108240 108240 108240 126280
DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND THRU-TUBE
Diameter, in. - Length, Ft. 16 - 10 18 - 10 18 - 10 18 - 10
Diameter, (mm) - Length, (mm) (406 - 3048) (457 - 3048) (457 - 3048) (457 - 3048)
Water Volume, Gallons, (L) 43.6 (165) 57.30 (216.9) 57.30 (216.9) 57.30 (216.9)
Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207) 175 (1207)
Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552) 225 (1552)
Water Inlet / Outlet Victaulic Connections, In. (mm) 6 (152.4) 6 (152.4) 6 (152.4) 6 (152.4)
Drain - NPT int, In. (mm) 0.375 (9.5) 0.375 (9.5) 0.375 (9.5) 0.375 (9.5)
Vent - NPT int, In. (mm) 0.375 (9.5) 0.375 (9.5) 0.375 (9.5) 0.375 (9.5)
NOTE:
1. Nominal capacity based on 95F ambient air and 54F/44F water range.
Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2
7229)
-67-83-92-100 -67-83-92-100 -64-84-92-100 -63-71-86-100
-67-83-92-100 -67-83-92-100 -68-84-92-100 -63-71-86-100
5283)
(7229 -
7229)
(2032 x
5283)
(7229 -
7229)
(2032 x
5283)
ALR MODEL NUMBER
(7229 -
7229)
(2032 x
5283)
(7229 -
7229)
(2032 x
5283)
(7229 -
7229)
(2032 x
5283)
(7229 -
7229)
(2032 x
6172)
(7229 -
7229)
(2032 x
6172)
IM ALR ALR 110E through 185E
13
Table 9, Physical Data ALR 170E through 185E
PHYSICAL DATA ALR MODEL NUMBER
170E 180E 185E
BASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2
Unit Capacity @ ARI Conditions (1), Tons (kW) 167.2 (587.9) 177.3 (623.4) 185.8 (653.3)
Number Of Refrigerant Circuits 2 2 2
Unit Operating Charge, R-22, Lb. 140 140 145 145 145 145
Unit Operating Charge, R-22, (kg) (52.2) (52.2) (54.4) (54.4) (54.4) (54.4)
Cabinet Dimensions, LxWxH, In. 263 x 83 x 93 263 x 83 x 93 263 x 83 x 93
Cabinet Dimensions, LxWxH, (mm) (6690 x 2118 x 2369) (6690 x 2118 x 2369) (6690 x 2118 x 2369)
Unit Operating Weight, Lbs. (kg) 11805 (5355) 11805 (5355) 11805 (5355)
Unit Shipping Weight, Lbs. (kg) 11405 (5174) 11405 (5174) 11405 (5174)
Add'l Weight If Copper Finned Coils, Lb. (kg) 1930 (876) 1930 (876) 1930 (876)
COMPRESSORS
Type Semi-Hermetic Semi-Hermetic Semi-Hermetic
Nominal Horsepower 50-50 50-50 50-60 50-60 60-60 60-60
Number Of Cylinders Per Compressor 8 - 8 8 - 8 8 - 8 8 - 8 8 - 8 8 - 8
Oil Charge Per Compressor, Oz. 255 - 255 255 - 255 255 - 255 255 - 255 255 - 255 255 - 255
Oil Charge Per Compressor, (g) (7229 -
7229)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Standard Staging - Circuit #1 in Lead
Standard 6 Stages (N/A on MicroTech Units) 0-19-37-44-50-75-100 0-17-34-40-46-73-100 0-19-37-44-50-75-100
Standard Staging - Circuit #2 in Lead
Standard 6 Stages (N/A on MicroTech Units) 0-19-37-44-50-75-100 0-17-34-40-46-73-100 0-19-37-44-50-75-100
Optional Staging - Circuit #1 in Lead
Optional 8 Stages (Std. on MicroTech Units) 0-19-37-44-50 0-17-34-40-46 0-19-37-44-50
-62-75-87-100 -67-89-94-100 -62-75-87-100
Optional Staging - Circuit #2 in Lead
Optional 8 Stages (Std. on MicroTech Units) 0-19-37-44-50 0-17-34-40-46 0-19-37-44-50
-62-75-87-100 -67-89-94-100 -62-75-87-100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
(7229 -
7229)
(7229 -
7229)
(7229 -
7229)
(7229 -
7229)
(7229 -
7229)
Coil Face Area,Sq. Ft. 135 135 135 135 135 135
Coil Face Area, (M2) (12.5) (12.5) (12.5) (12.5) (12.5) (12.5)
Finned Height x Finned Length, In. 80 x 243 80 x 243 80 x 243 80 x 243 80 x 243 80 x 243
Finned Height x Finned Length, (mm) (2032 x
6172)
Fins Per Inch x Rows Deep 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3
Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm) 14 - 28 (711) 14 - 28 (711) 14 - 28 (711)
Number Of Motors - HP (kW) 14 - 1.5 (1.1) 14 - 1.5 (1.1) 14 - 1.5 (1.1)
Fan And Motor RPM, 60/50Hz 1100/915 1100/915 1100/915
60 Hz Fan Tip Speed, FPM 8063 8063 8063
60 Hz Total Unit Airflow, CFM 126280 126280 126280
DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND THRU-TUBE
Diameter, in. - Length, Ft. 18 - 10 18 - 10 18 - 10
Diameter, (mm) - Length, (mm) (457 - 3048) (457 - 3048) (457 - 3048)
Water Volume, Gallons, (L) 57.30 (216.9) 57.30 (216.9) 57.30 (216.9)
Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207)
Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552)
Water Inlet / Outlet Victaulic Connections, In. (mm) 6 (152.4) 6 (152.4) 6 (152.4)
Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5)
Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5)
NOTE:
1. Nominal capacity based on 95F ambient air and 54F/44F water range.
(2032 x
6172)
(2032 x
6172)
(2032 x
6172)
(2032 x
6172)
(2032 x
6172)
14
ALR 110E through 185E IM ALR
Electrical Data
Field Wiring
CAUTION
Internal power wiring to the compressors f or single and multiple point option are different.
Field wiring must be installed according to unit wiring diagram.
Wiring must comply with all applicable codes and ord inances. Warranty is void if wiring is not in
accordance with specifications. Copper wire is required for all power lead terminations at the unit.
Aluminum or copper can be used for all other wiring.
ALR units may be ordered with internal power wiring for either single or multiple point power
connection. If single point power connection is ordered, a single large power terminal block is
provided and wiring within the unit is sized in accordance with the National Electrical Code. A single
field supplied fused disconnect is required. An optional factory mounted transformer may be
installed.
If multiple point power wiring is ordered, three power connections, one per compressor circuit,
one for condenser fans, and control circuit, are required. Separate field supplied fused disconnects
are required for each of the three circuits. A single power block is provided for all of the condenser
fans and the optional 115V control transformer.
If the evaporator heater is on a separate disconnect switch from the main unit power supply, the
unit may be shut down without defeating the freeze protection provided by the cooler heater.
Table 10, 110E - 135E Electrical Data Single Point
Minimum POWER SUPPLY FIELD FUSE SIZE
ALR Circuit Field Wire Hub
Unit Volts HZ. Ampacity Wire Nominal Recommended Maximum
Size (MCA) Quantity Gauge Quantity Size
208 494 6 350 1 4.00 (102) 600 600
230 483 6 350 1 4.00 (102) 600 500
110E 460 60 244 3 250 1 2.50 (64) 300 300
575 184 3 3/0 1 2.00 (51) 200 225
208 547 6 500 1 4.00 (102) 600 600
230 517 6 400 1 4.00 (102) 600 600
120E 460 60 270 3 300 1 2.50 (64) 300 300
575 196 3 3/0 1 2.00 (51) 225 225
208 584 6 500 1 4.00 (102) 700 700
230 546 6 500 1 4.00 (102) 600 600
130E 460 60 289 3 350 1 2.50 (64) 300 300
575 206 3 4/0 1 2.00 (51) 225 225
208 615 6 350 2 2.50 (64) 700 700
230 579 6 350 2 2.50 (64) 700 700
135E 460 60 298 3 350 1 2.50 (64) 350 350
575 220 3 300 1 2.00 (51) 250 250
Table continued next page
See page 22 for all Electrical Data notes.
IM ALR ALR 110E through 185E
15
Table 10, 140E - 185E Electrical Data Single Point (Continued)
Minimum POWER SUPPLY FIELD FUSE SIZE
ALR Circuit Field Wire Hub
Unit Volts HZ. Ampacity Wire Nominal Recommended Maximum
Size (MCA) Quantity Gauge Quantity Size
208 643 6 500 2 3.00 (76) 700 700
230 609 6 500 2 3.00 (76) 700 700
140E 460 60 306 3 350 1 2.50 (64) 350 350
575 232 3 250 1 2.50 (64) 250 250
208 643 6 500 2 3.00 (76) 700 700
230 609 6 500 2 3.00 (76) 700 700
145E 460 60 306 3 350 1 2.50 (64) 350 350
575 232 3 250 1 2.50 (64) 250 250
208 677 6 500 2 3.00 (76) 800 800
230 653 6 500 2 3.00 (76) 800 800
150E 460 60 328 3 400 1 3.00 (76) 350 450
575 257 3 300 1 2.50 (64) 300 300
208 716 6 500 2 3.00 (76) 800 800
230 700 6 500 2 3.00 (76) 800 800
160E 460 60 352 3 500 1 3.00 (76) 400 400
575 281 3 300 1 2.50 (64) 300 300
208 770 6 600 2 3.00 (76) 800 800
230 770 6 600 2 3.00 (76) 800 800
170E 460 60 388 3 600 1 3.00 (76) 450 450
575 321 3 400 1 3.00 (76) 350 350
208 860 12 300 2 4.0 (102) 1000 1000
230 860 12 300 2 4.0 (102) 1000 1000
180E 460 60 413 3 600 1 3.00 (76) 500 500
575 337 3 500 1 3.00 (76) 400 400
208 940 12 350 2 4.0 (102) 1000 1000
230 940 12 350 2 4.0 (102) 1000 1000
185E 460 60 435 6 300 1 3.00 (76) 500 500
575 351 3 500 1 3.00 (76) 400 400
See page 22 for all Electrical Data notes.
16
ALR 110E through 185E IM ALR
Table 11, 110E - 135E Electrical Data Multiple Point
Electrical Circuit #1 - Fans and Transformer Electrical Circuit #2 - Compressor Circuit #1 Electrical Circuit #3 - Compressor Circuit #2
ALR Min. Power Supply Field
Fusing
Unit Volts HZ.Circuit Field Wire Hub Rec. Max. Circuit Field Wire Hub Rec. Max. Circuit Field Wire Hub Rec. Max.
Min. Power Supply Field Fusing Min. Power Supply Field Fusing
Size Amps Wire Hub Fuse Fuse Amps Wire Hub Fuse Fuse Amps Wire Hub Fuse Fuse
208 60 3 6 1 1.50
230 60 3 6 1 1.50
110E 460 60 29 3 10 1 1.00
575 24 3 10 1 1.00
208 60 3 6 1 1.50
230 60 3 6 1 1.50
120E 460 60 29 3 10 1 1.00
575 24 3 10 1 1.00
208 71 3 4 1 2.00
230 71 3 4 1 2.00
130E 460 60 35 3 8 1 1.25
575 28 3 10 1 1.00
208 71 3 4 1 2.00
230 71 3 4 1 2.00
135E 460 60 35 3 8 1 1.25
575 28 3 10 1 1.00
208 71 3 4 1 2.00
230 71 3 4 1 2.00
140E 460 60 35 3 8 1 1.25
575 28 3 10 1 1.00
208 71 3 4 1 2.00
230 71 3 4 1 2.00
145E 460 60 35 3 8 1 1.25
575 28 3 10 1 1.00
208 71 3 4 1 2.00
230 71 3 4 1 2.00
150E 460 60 35 3 8 1 1.25
575 28 3 10 1 1.00
208 83 3 4 1 2.00
230 83 3 4 1 2.00
160E 460 60 40 3 8 1 1.25
575 33 3 10 1 1.00
(MCA) Qty. Gauge Qty. Size Size Size (MCA) Qty. GaugeQty. Size Size Size (MCA) Qty. Gauge Qty. Size Size Size
60 60 214 3 4/0 1 2.00
(38)
60 60 214 3 4/0 1 2.00
(38)
30 30 106 3 2 1 1.25
(25)
25 25 81 3 4 1 1.00
(25)
60 60 247 3 250 1 2.50
(38)
60 60 235 3 250 1 2.50
(38)
30 30 122 3 1 1 1.25
(25)
25 25 89 3 3 1 1.25
(25)
80 80 273 3 300 1 2.50
(51)
80 80 252 3 250 1 2.50
(51)
35 35 135 3 1/0 1 1.50
(32)
30 30 95 3 3 1 1.25
(25)
80 80 290 3 350 1 2.50
(51)
80 80 271 3 300 1 2.50
(51)
35 35 140 3 1/0 1 1.50
(32)
30 30 102 3 2 1 1.25
(25)
80 80 304 3 350 1 2.50
(51)
80 80 286 3 350 1 2.50
(51)
35 35 144 3 1/0 1 1.50
(32)
30 30 108 3 2 1 1.25
(25)
80 80 304 3 350 1 2.50
(51)
80 80 286 3 350 1 2.50
(51)
35 35 144 3 1/0 1 1.50
(32)
30 30 108 3 2 1 1.25
(25)
80 80 304 3 350 1 2.50
(51)
80 80 286 3 350 1 2.50
(51)
35 35 144 3 1/0 1 1.50
(32)
30 30 108 3 2 1 1.25
(25)
90 90 338 3 500 1 3.00
(51)
90 90 330 3 400 1 3.00
(51)
40 40 167 3 2/0 1 2.00
(32)
35 35 133 3 1/0 1 1.50
(25)
250 300 247 3 250 1 2.50
(51)
250 300 235 3 250 1 2.50
(51)
125 150 122 3 1 1 1.25
(32)
100 110 89 3 3 1 1.25
(25)
300 350 273 3 300 1 2.50
(64)
300 300 252 3 250 1 2.50
(64)
150 150 135 3 1/0 1 1.50
(32)
110 125 95 3 3 1 1.25
(32)
350 350 273 3 300 1 2.50
(64)
300 350 252 3 250 1 2.50
(64)
175 175 135 3 1/0 1 1.50
(38)
110 125 95 3 3 1 1.25
(32)
350 400 290 3 350 1 2.50
(64)
350 350 271 3 300 1 2.50
(64)
175 200 140 3 1/0 1 1.50
(38)
125 150 102 3 2 1 1.25
(32)
400 304 3 350 1 2.50
(64)
350350400 286 3 350 1 2.50
(64)
175 200 144 3 1/0 1 1.50
(38)
125 150 108 3 2 1 1.25
(32)
350 400 304 3 350 1 2.50
(64)
350 400 286 3 350 1 2.50
(64)
175 200 144 3 1/0 1 1.50
(38)
125 150 108 3 2 1 1.25
(32)
350 400 338 3 500 1 3.00
(64)
350 400 330 3 400 1 3.00
(64)
175 200 167 3 2/0 1 2.00
(38)
125 150 133 3 1/0 1 1.50
(32)
400 400 338 3 500 1 3.00
(76)
400 400 330 3 400 1 3.00
(76)
200 225 167 3 2/0 1 2.00
(51)
175 200 133 3 1/0 1 1.50
(38)
300 350
(64)
300 300
(64)
150 150
(32)
110 125
(32)
350 350
(64)
300 350
(64)
175 175
(38)
110 125
(32)
350 350
(64)
300 350
(64)
175 175
(38)
110 125
(32)
350 400
(64)
350 350
(64)
175 200
(38)
125 150
(32)
350 400
(64)
350 400
(64)
175 200
(38)
125 150
(32)
350 400
(64)
350 400
(64)
175 200
(38)
125 150
(32)
400 400
(76)
400 400
(76)
200 225
(51)
175 200
(38)
400 400
(76)
400 400
(76)
200 225
(51)
175 200
(38)
Continued next page
IM ALR ALR 110E through 185E
17
Table 11, 170E - 185E Electrical Data Multiple Point (Continued
Electrical Circuit #1 - Fans and Transformer Electrical Circuit #2 - Compressor Circuit #1 Electrical Circuit #3 - Compressor Circuit #2
ALR Min. Power Supply Field Fusing Min. Power Supply Field
Fusing
Unit Volts HZ.Circuit Field Wire Hub Rec. Max. Circuit Field Wire Hub Rec. Max. Circuit Field Wire Hub Rec. Max.
Min. Power Supply Field
Fusing
Size Amps Wire Hub Fuse Fuse Amps Wire Hub Fuse Fuse Amps Wire Hub Fuse Fuse
208 83 3 4 1 2.00
230 83 3 4 1 2.00
170E 460 60 40 3 8 1 1.25
575 33 3 10 1 1.00
208 83 3 4 1 2.00
230 83 3 4 1 2.00
180E 460 60 40 3 8 1 1.25
575 33 3 10 1 1.00
208 83 3 4 1 2.00
230 83 3 4 1 2.00
185E 460 60 40 3 8 1 1.25
575 33 3 10 1 1.00
(MCA) Qty Gauge Qty Size Size Size (MCA) Qty Gauge Qty Size Size Size (MCA) QtyGauge Qty Size Size Size
90 90 365 3 500 1 3.00
(51)
90 90 365 3 500 1 3.00
(51)
40 40 185 3 3/0 1 2.00
(32)
35 35 153 3 2/0 1 2.00
(25)
90 90 415 6 300 1 3.00
(51)
90 90 415 6 300 1 3.00
(51)
40 40 199 3 3/0 1 2.00
(32)
35 35 162 3 2/0 1 2.00
(25)
90 90 455 6 350 1 4.00
(51)
90 90 455 6 350 1 4.00
(51)
40 40 210 3 4/0 1 2.00
(32)
35 35 169 3 2/0 1 2.00
(25)
450 500 365 3 500 1 3.00
(76)
450 500 365 3 500 1 3.00
(76)
225 250 185 3 3/0 1 2.00
(51)
175 200 153 3 2/0 1 2.00
(51)
500 600 415 6 300 1 3.00
(76)
500 600 415 6 300 1 3.00
(76)
225 250 199 3 3/0 1 2.00
(51)
200 225 162 3 2/0 1 2.00
(51)
600 600 455 6 350 1 4.00
(102)
600 600 455 6 350 1 4.00
(102)
250 300 210 3 4/0 1 2.00
(51)
200 225 169 3 2/0 1 2.00
(51)
450 500
(76)
450 500
(76)
225 250
(51)
175 200
(51)
500 600
(76)
500 600
(76)
225 250
(51)
200 225
(51)
600 600
(102)
600 600
(102)
250 300
(51)
200 225
(51)
See page 22 for all Electrical Data notes.
Table 12, 110E -135E Compressor And Condenser Fan Motor Amp Draw
Rated Load Amps Locked Rotor Amps
ALR Compressors Fan No. Of Fan Compressors
Unit Volts HZ. No. No. No. No. Motors Fan Motors Across-The-Line Reduced Inrush
Size 1234(Each) Motors (Each) No. 1 No. 2 No. 3 No. 4 No. 1 No. 2 No. 3 No. 4
208 95 95 95 121 5.8 10 23.7 565 565 565 650 340 340 340 400
230 95 95 95 112 5.8 10 21.4 565 565 565 594 340 340 340 340
110E 460 60 47 47 47 60 2.8 10 10.7 283 283 283 297 156 156 156 195
575 36 36 36 42 2.3 10 11.5 230 230 230 245 138 138 138 152
208 95 121 121 121 5.8 10 23.7 565 650 650 650 340 400 400 400
230 95 112 112 112 5.8 10 21.4 565 594 594 594 340 340 340 340
120E 460 60 47 60 60 60 2.8 10 10.7 283 297 297 297 156 195 195 195
575 36 42 42 42 2.3 10 11.5 230 245 245 245 138 152 152 152
208 121 121 121 121 5.8 12 23.7 650 650 650 650 400 400 400 400
230 112 112 112 112 5.8 12 21.4 594 594 594 594 340 340 340 340
130E 460 60 60 60 60 60 2.8 12 10.7 297 297 297 297 195 195 195 195
575 42 42 42 42 2.3 12 11.5 245 245 245 245 152 152 152 152
208 121 121 135 135 5.8 12 23.7 650 650 754 754 400 400 463 463
230 112 112 127 127 5.8 12 21.4 594 594 594 594 340 340 340 340
135E 460 60 60 60 64 64 2.8 12 10.7 297 297 297 297 195 195 195 195
575 42 42 48 48 2.3 12 11.5 245 245 245 245 152 152 152 152
Continued on next page
See page 22 for all Electrical Data notes.
18
ALR 110E through 185E IM ALR
Table 12, 140E - 185E Compressor And Condenser Fan Motor Amp Draw (Continued)
Rated Load Amps Locked Rotor Amps
ALR Compressors Fan No. Of Fan Compressors
Unit Volts HZ. No. No. No. No. Motors Fan Motors Across-The-Line Reduced Inrush
Size 1234(Each) Motors (Each) No. 1 No. 2 No. 3 No. 4 No. 1 No. 2 No. 3 No. 4
208 135 135 135 135 5.8 12 23.7 754 754 754 754 463 463 463 463
230 127 127 127 127 5.8 12 21.4 594 594 594 594 340 340 340 340
140E 460 60 64 64 64 64 2.8 12 10.7 297 297 297 297 195 195 195 195
575 48 48 48 48 2.3 12 11.5 245 245 245 245 152 152 152 152
208 135 135 135 135 5.8 12 23.7 754 754 754 754 463 463 463 463
230 127 127 127 127 5.8 12 21.4 594 594 594 594 340 340 340 340
145E 460 60 64 64 64 64 2.8 12 10.7 297 297 297 297 195 195 195 195
575 48 48 48 48 2.3 12 11.5 245 245 245 245 152 152 152 152
208 135 135 135 162 5.8 12 23.7 754 754 754 1070 463 463 463 654
230 127 127 127 162 5.8 12 21.4 594 594 594 1070 340 340 340 654
150E 460 60 64 64 64 82 2.8 12 10.7 297 297 297 510 195 195 195 330
575 48 48 48 68 2.3 12 11.5 245 245 245 405 152 152 152 262
208 135 135 162 162 5.8 14 23.7 754 754 1070 1070 463 463 654 654
230 127 127 162 162 5.8 14 21.4 594 594 1070 1070 340 340 654 654
160E 460 60 64 64 82 82 2.8 14 10.7 297 297 510 510 195 195 330 330
575 48 48 68 68 2.3 14 11.5 245 245 405 405 152 152 262 262
208 162 162 162 162 5.8 14 23.7 1070 1070 1070 1070 654 654 654 654
230 162 162 162 162 5.8 14 21.4 1070 1070 1070 1070 654 654 654 654
170E 460 60 82 82 82 82 2.8 14 10.7 510 510 510 510 330 330 330 330
575 68 68 68 68 2.3 14 11.5 405 405 405 405 262 262 262 262
208 162 162 202 202 5.8 14 23.7 1070 1070 1070 1070 654 654 654 654
230 162 162 202 202 5.8 14 21.4 1070 1070 1070 1070 654 654 654 654
180E 460 60 82 82 93 93 2.8 14 10.7 510 510 510 510 330 330 330 330
575 68 68 75 75 2.3 14 11.5 405 405 405 405 262 262 262 262
208 202 202 202 202 5.8 14 23.7 1070 1070 1070 1070 654 654 654 654
230 202 202 202 202 5.8 14 21.4 1070 1070 1070 1070 654 654 654 654
185E 460 60 93 93 93 93 2.8 14 10.7 510 510 510 510 330 330 330 330
575 75 75 75 75 2.3 14 11.5 405 405 405 405 262 262 262 262
See page 22 for all Electrical Data notes.
IM ALR ALR 110E through 185E
19
Table 13, 110E - 185E Field Wiring Data ,Single Point Power
Wiring to Wiring to
ALR Standard Power Block Optional Disconnect Switch
Unit Volts HZ. Terminal Connector Wire Range Terminal Connector Wire Range
Size Amps (Copper Wire Only) Amps (Copper Wire Only)
208 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM
230 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM
110E 460 60 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
575 335 (1 qty.) #4 - 400 MCM 250 (1qty.) #4 - 350 MCM
208 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM
230 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM
120E 460 60 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
575 335 (1 qty.) #4 - 400 MCM 250 (1qty.) #4 - 350 MCM
208 840 (2 qty.) 1/0 - 600 MCM N/A
230 840 (2 qty.) 1/0 - 600 MCM N/A
130E 460 60 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
575 335 (1 qty.) #4 - 400 MCM 250 (1qty.) #4 - 350 MCM
208 840 (2 qty.) 1/0 - 600 MCM N/A
230 840 (2 qty.) 1/0 - 600 MCM N/A
135E 460 60 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
575 335 (1 qty.) #4 - 400 MCM 250 (1qty.) #4 - 350 MCM
208 840 (2 qty.) 1/0 - 600 MCM N/A
230 840 (2 qty.) 1/0 - 600 MCM N/A
140E 460 60 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
575 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
208 840 (2 qty.) 1/0 - 600 MCM N/A
230 840 (2 qty.) 1/0 - 600 MCM N/A
145E 460 60 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
575 335 (1 qty.) #4 - 400 MCM 400 (1 qty.) 250 - 500 MCM
208 840 (4 qty.) 1/0 - 600 MCM N/A
230 840 (4 qty.) 1/0 - 600 MCM N/A
150E 460 60 840 (2 qty.) 1/0 - 600 MCM 400 (1 qty.) 250 - 500 MCM
575 840 (2 qty.) 1/0 - 600 MCM 400 (1 qty.) 250 - 500 MCM
208 840
230 840
160E 460 60 840 (2 qty.) 1/0 - 600 MCM 400 (1 qty.) 250 - 500 MCM
575 840 (2 qty.) 1/0 - 600 MCM 400 (1 qty.) 250 - 500 MCM
208 840
230 840
170E 460 60 840 (2 qty.) 1/0 - 600 MCM 600 (1 qty.) 250 - 500 MCM
575 840 (2 qty.) 1/0 - 600 MCM 400 (1 qty.) 250 - 500 MCM
208 840
230 840
180E 460 60 840 (2 qty.) 1/0 - 600 MCM 600 (1 qty.) 250 - 500 MCM
575 840 (2 qty.) 1/0 - 600 MCM 400 (1 qty.) 250 - 500 MCM
208 840
230 840
185E 460 60 840 (2 qty.) 1/0 - 600 MCM 600 (1 qty.) 250 - 500 MCM
575 840 (2 qty.) 1/0 - 600 MCM 400 (1 qty.) 250 - 500 MCM
Note:*
There are 2 power blocks, each having 840 terminal amps. (1680 total terminal amps)
See page 22 for all other Electric al Data notes.
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(4 qty.) 1/0 - 600 MCM N/A
(4 qty.) 1/0 - 600 MCM N/A
(4 qty.) 1/0 - 600 MCM N/A
(4 qty.) 1/0 - 600 MCM N/A
(4 qty.) 1/0 - 600 MCM N/A
(4 qty.) 1/0 - 600 MCM N/A
(4 qty.) 1/0 - 600 MCM N/A
(4 qty.) 1/0 - 600 MCM N/A
20
ALR 110E through 185E IM ALR
Table 14, 110E - 185E Field Wiring Data, Multiple Point Power
ALR Wiring to Standard Power Block
Unit Volts HZ. Terminal Amps Connector Wire Range (Copper Wire Only)
Size Circuit 1 Circuit 2 Circuit 3 Circuit 1 Circuit 2 Circuit 3
208 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
110E 460 60 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
120E 460 60 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
130E 460 60 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
135E 460 60 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
140E 460 60 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
145E 460 60 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
150E 460 60 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
160E 460 60 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
170E 460 60 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
180E 460 60 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
185E 460 60 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
See page 22 for all Electrical Data notes.
230 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
575 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
208 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
230 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
575 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
208 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
230 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
575 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
208 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
230 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
575 175 175 175 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0 (1 qty.) #12 - 2/0
208 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
230 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
575 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
208 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
230 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
575 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
208 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
230 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
575 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
208 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
230 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
575 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
208 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
230 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
575 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
208 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
230 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
575 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
208 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
230 175 840 840 (1 qty.) #12 - 2/0 (2 qty.) 1/0 - 600 MCM (2 qty.) 1/0 - 600 MCM
575 175 335 335 (1 qty.) #12 - 2/0 (1 qty.) #4 - 400 MCM (1 qty.) #4 - 400 MCM
IM ALR ALR 110E through 185E
21
Notes for “Electrical Data Single Point” and “Electrical Data Multiple Point” Power:
1. Unit wire size ampacity (MCA) is equal to 125% of the largest compressor-motor RLA plus
100% of RLA of all other loads in the circuit including the control transformer.
2. If the control transformer option is furnished, no separate 115v power is required.
3. If a separate 115V power supply is used for the control circuit, then the wire sizing is 12 amps.
4. Recommended power lead wire sizes for 3 conductors per conduit are based on 100% conductor
ampacity in accordance with NEC. Wire sizes for 6 conductors per conduit are based on 80%
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. The unit power terminal block may have 2 lugs per phase. Single or parallel conductors should
be used for power connections as listed under “Recommended Power Lead Wire Size.”
6. “Recommended Fuse Sizes” are selected at approximately 150% of the largest compressor RLA,
plus 100% of all other loads in the circuit.
7. “Maximum Fuse Sizes” are selected at approximately 225% of the largest compressor RLA, plus
100% of all other loads in the circuit.
8. The recommended power lead wire sizes are based on an ambient temperature of 86° F.
Ampacity correction factors must be applied for other ambient temperatures. Refer to the
National Electrical Code Handbook.
Voltage Limitations:
Unit Nameplate - 208V/60Hz/3Ph: 187V to 253V (except ALR110E through ALR155E: 187V to
220V)
Unit Nameplate - 230V/60Hz/3Ph: 187V to 253V (except ALR110E through ALR155E: 207V to
253V)
Unit Nameplate - 460V/60Hz/3Ph: 414V to 506V
Unit Nameplate - 575V/60Hz/3Ph: 517V to 633V
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. If unit is equipped with SpeedTrol condenser fan motors, the first
motor on each refrigerant circuit is a single phase, 1hp motor, with a FLA of 2.8 amps at 460
volts, 5.6 amps at 208, 230, and 575 volts.
2. Compressor LRA for reduced inrush start are for the first winding only. If the unit is equipped
with SpeedTrol motors, the first motor is a single phase, 1 hp motor, with a LRA of 7.3 amps at
460 volts, 14.5 amps at 208, 230 and 575 volts.
Notes for “Field Wiring Data” - Both Single and Multiple Point Power:
1. Single point power supply requires a single disconnect to supply electrical power to the unit.
This power must be fused.
2. Multiple point power supply requires two independent power circuits each with separate
disconnects and a separate control circuit.
3. All field wiring to unit power block or optional non-fused disconnect switch must be copper.
4. All field wire size values given in table apply to 75° C rated wire per NEC.
22
ALR 110E through 185E IM ALR
Figure 7, ALR 110E through 185E, Typical Field Wiring Diagram
DISCONNECT
BY OTHERS
TERMINAL BLOCK
3 PHASE
2
4
POWER
SUPPLY
1
TO COMPRESSOR(S)
AND FAN MOTORS.
T2
AMBIENT
OPTIONAL FUSED
CONTROL CIRCUIT
TRANSFORMER
COOLER HEATER
CHILLER CONTROL
BI4
27
28
BK
540
F1
S1
17
18
13 F2
CHILLER FLOW
SWITCH CONTACT
SEPARTE 115V
POWER FOR COOLER
HEATER (SEE NOTE A)
COOLER HEATER
THEMOSTATTC2.
120V
24V
THERMOSTAT
545
WH
16
NB
WH
SEE NOTE A
BI1
TIMECLOCK
AUTO
5
CONTACT
OFF
ON
24VAC
CHILLER CONTROL
(CIRCUIT 1)
CHILLER CONTROL
(CIRCUIT 2)
LEGEND
FIELD CONNECTION TERMINAL
FACTORY WIRING
FIELD WIRING
NOTE A :
IT MAY BE DESIRABLE TO HAVE THE UNIT
COOLER HEATER ON A SEPARATE DISCONNECT
SWITCH FROM THE MAIN UNIT POWER SUPPLY
SO THAT THE UNIT MAY BE SHUT DOWN WITH
OUT DEFEATING THE FREEZE PROTECTION
PROVIDED BY THE COOLER HEATER. TO AC-
COMPLISH THIS, REMOVE WIRES 540 AND 545
AND FIELD WIRE TERMINALS 13 AND 16 TO A
SEPARATE 115V POWER SOURCE.
IM ALR ALR 110E through 185E
23
Dimensional Data
Figure 8, 110E through 185E Dimensions
ALR EVAPORATOR CENTER OF GRAVITY ISOLATOR LOCATION NUMBER
UNIT "A" CONN. WATER CONNECTIONS X Y R S T OF
SIZE LENGTH SIZE (1) B C E FANS
110E
120E
130E
135E
140E
145E
150E
160E
170E
180E
185E
229 (5817) 6 (152.4) 117.6
(2987)
229 (5817) 6 (152.4) 118.5
(3010)
229 (5817) 6 (152.4) 118.5
(3010)
229 (5817) 6 (152.4) 118.5
(3010)
229 (5817) 6 (152.4) 118.5
(3010)
229 (5817) 6 (152.4) 118.5
(3010)
229 (5817) 6 (152.4) 118.5
(3010)
263 (6680) 6 (152.4) 153.2
(3891)
263 (6680) 6 (152.4) 153.2
(3891)
263 (6680) 6 (152.4) 153.2
(3891)
263 (6680) 6 (152.4) 153.2
(3891)
13.8 (351) 19.5 (495) 106.5
(2705)
12.9 (328) 19.5 (495) 106.5
(2705)
12.9 (328) 19.5 (495) 107.0
(2718)
12.9 (328) 19.5 (495) 105.0
(2667)
12.9 (328) 19.5 (495) 108.0
(2743)
12.9 (328) 20.5 (521) 103.0
(2616)
12.9 (328) 20.5 (521) 105.0
(2667)
47.6 (1209) 20.5 (521) 121.0
(3074)
47.6 (1209) 20.5 (521) 119.0
(3023)
47.6 (1209) 20.5 (521) 118.0
(2997)
47.6 (1209) 20.5 (521) 118.0
(2997)
41.7 (1059) 13 (330) 58 (1473) 215 (5461) 10
41.7 (1059) 13 (330) 58 (1473) 215 (5461) 10
41.7 (1059) 13 (330) 58 (1473) 215 (5461) 12
41.7 (1059) 13 (330) 58 (1473) 215 (5461) 12
41.7 (1059) 13 (330) 58 (1473) 215 (5461) 12
41.7 (1059) 13 (330) 58 (1473) 215 (5461) 12
41.7 (1059) 13 (330) 58 (1473) 215 (5461) 12
41.7 (1059) 13 (330) 95 (2413) 250 (6350) 14
41.7 (1059) 13 (330) 95 (2413) 250 (6350) 14
41.7 (1059) 13 (330) 95 (2413) 250 (6350) 14
41.7 (1059) 13 (330) 95 (2413) 250 (6350) 14
24
ALR 110E through 185E IM ALR
Unit Layout and Principles of Operation
Figure 9, Major Component Locations
The figure below illustrates component locations for each unit size.
Comp#1Comp
#1
045E, 050E,055E, 060E, 065E045E,
032E, 035E, 040E032E, 035E, 040E
Fan 11
Fan
Fan 21
Fan
CONTROL BOX
Comp#2Comp
#2
075E
070E
050E,055E, 060E, 065E
Cond
Cond
Cond
Cond
11
Fan 12
Fan 12
Cond
Cond
Cond
Cond
21
Fan 22
Fan 22
Fan 23
Fan 23
Cond
Cond
Fan 13
Fan 13
Cond
Cond
Cond
Cond
Fan 14
Fan 14
Cond
Cond
Fan 24
Fan 24
Cooler
Cond
Cond
Fan 15
Fan 15
Cond
Cond
Fan 25
Fan 25
Comp#1Comp
#1
080E, 085E, 090E, 100E, 110E, 120E080E, 085E, 090E, 100E, 110E, 120E
Cond
Cond
Fan 11
Fan
11
Cond
Cond
Fan 21
Fan
21
CONTROL BOX
Comp#2Comp
#2
160E, 170E, 180E, 185E160E,
135E, 140E, 145E, 150E
130E, 135E, 140E, 145E, 150E130E,
Cond
Cond
Cond
Cond
Fan 12
Fan 12
Fan 13
Fan 13
Cond
Cond
Cond
Cond
Fan 22
Fan 22
Fan 23
Fan 23
170E, 180E, 185E
Comp #3Comp
#3
Cond
Cond
Fan 14
Fan 14
Cond
Cond
Fan 24
Fan 24
Comp#4Comp
#4
Cond
Cond
Fan 15
Fan 15
Cond
Cond
Fan 25
Fan 25
Cond
Cond
Fan 16
Fan 16
Cond
Cond
Fan 26
Fan 26
Cooler
Cond
Cond
Fan 17
Fan 17
Cond
Cond
Fan 27
Fan 27
Control Center
All electrical controls are enclosed in a weatherproof control center with keylocked, hinged access
doors. The control center has two separate compartments, high voltage and low voltage. All high
voltage components are located in the compartment on the right side of the unit.
The low voltage components are located on the left side with the live terminals behind the
deadfront panel. This protects service personnel from live terminals when accessing the adjustable
and resettable controls.
Control center layouts ALR 080E through 185E
Figure 10, Left Side, 115V Control
Section
Figure 11, Right Side, High Voltage
Power Section
IM ALR ALR 110E through 185E
25
Note:
(
PB1, PB2, PB3 are used with multiple point power wiring
Figure 12,Recommended Field Installed Unit Disconnect Location
Hinged Doors on
Control Center
9.5"
(241mm)
Min.
Power
Into
Unit
6"
152mm) Min.
Note:
Mount disconnect on stationary panel so it does not interfere with hinged doors or with
Stationary Panel
Disconnect Switch
air intake into coil.
26
ALR 110E through 185E IM ALR
Start-up and Shutdown
Pre Start-up
1. Open all electric disconnects and check all electric connections for tightness. Check all
compressor valve connections for tightness.
2. Inspect all water piping for flow direction and correct connections at the evaporator.
3. Verify thermostat water temperature sensor is installed in the leaving water line (supply to
building). On all ALR units the sensor well and sensor are factory mounted.
4. Check compressor oil level. The oil level should be visible in the oil sightglass.
5. Check voltage of the unit power supply and make certain voltage is within ±10% of nameplate
rating.
6. Check unit power supply wiring for proper ampacity and a minimum insulation temperature of
75°C.
7. Verify all mechanical and electrical inspections have been completed according to local codes.
8. Verify all auxiliary control equipment is operative and an adequate cooling load is available.
9. Open compressor suction and discharge shutoff valves until backseated. Always replace valve
seal caps.
10. Open control stop switch S1(off) and place pumpdown switches PS1 and PS2 on “manual
pumpdown,”. Turn on the main power and control disconnect switches. This will energize
crankcase heaters. Wait at least 12 hours before starting up unit.
11. Open all water flow valves and start the chilled water pump. Check all piping for leaks and vent
the air from the evaporator as well as from the system piping. Flush the evaporator and system
piping to obtain clean, noncorrosive water in the evaporator.
NOTE:
chilled water flow switch is closed.
If LWC1 is a Unit 33 Metasys control, the control must be energized before the
CAUTION
Most relays and terminals in the unit control center are ener gized with S1 and the contr ol
circuit disconnect on. Do not close S1 until start-up.
Start-up
1. Verify compressor suction and discharge shutoff valves are backseated. Always replace valve
seal caps.
2. Open oil equalization line valve.
3. Open manual liquid line shutoff valve at the outlet of the condenser subcooler.
4. Set temperature controller LWC1 to the desired chilled water temperature. Set the control band.
5. Start auxiliary equipment by turning on the following:
Time clock
Ambient thermostat and/or remote on/off switch
Chilled water pump.
6. Verify pumpdown switches PS1 and PS2 are in “manual pumpdown” (open) position. If
pressures on the low side of the system are above 60 psig (414 kPa), the unit will start and pump
down.
IM ALR ALR 110E through 185E
27
7. After compressor lockout timer TD1 has timed out, start the system by moving pumpdown
switches PS1 and PS2 to “auto pumpdown” position.
8. After running the unit for a sho rt time, check the following:
Oil level in each compressor crankcase
Rotation of fans
Flashing in refrigerant sightglass.
9. Verify superheat temperature is at the factory setting of 8 to 12 degrees F (4.4 to 6.7 degrees C).
10. After system performance has stabilized, complete the “Compressorized Equipment Warranty
Form” (Form No. 415415Y) to obtain full warranty benefits. Return the form to McQuay
International through your sales r epresentative.
Sequence of Operation
The following sequence of operation is typical for ALR air-cooled water chiller, Models ALR 110E
through ALR 185E. The sequence varies depending upon options.
Start - up
With the control circuit power on and the control stop switch S1 closed, 115V power is applied
through the control ci rcuit fuse F1 to the compressor crankcase heaters HTR1, HT R2, HTR3, and
HTR4, the compressor motor protections MP1, MP2, MP3 and MP4, and the primary of the 24V
control circuit transformer. T he 24V transformer provides power to the contacts of the low pressure
controls LP1 and LP2 and the compressor lockout timer TD1 and TD2.
When the remote time clock or manual shutdown switch turns on the chilled water pump, the
flow switch closes and 115V power is applied to the relay contacts on the leaving water control
LWC1. The unit will automatically operate in response to the LWC1 if the manual pumpdown
switches PS1 and PS2 are closed ( in the “auto” position); the compressor lockout time relays R5, R6,
R7, and R8; and the freezestats FS1 and FS2, high pressure controls HP1 and HP2, and the
compressor motor protectors MP1, MP2, MP3, and MP4 do not sense failure conditions.
On a call for cooling, the leaving water control LWC1 completes the circuit to the liquid line
solenoid valve SV1 for refrigerant circuit #1, opening the valve and allowing refrigerant to flow
through the expansion valve and into the evaporat or. As the evaporator refrigerant pressure increases,
the low pressure control LP1 closes. This energizes the compressor starting relay R9, starting the
compressor via the compressor contactors M1 and M5. Closing the R9 contacts also energizes the
condenser fan motor contacts M11 and M12 starting the fan motors.
As additional stages of cooling capacity are required, the leaving water control LWC1 energizes
the liquid line solenoid valve SV2 of the refrigerant circuit #2. After the compressor sequencing time
delay TD11 has closed, the same starting sequence is initiated in refrigerant circuit #2.
If still more cooling is required, the leaving water control will start the remaining compressors
and then de-energize unloader solenoids until the capacity requirement is met.
28
ALR 110E through 185E IM ALR
Pumpdown
As the leaving water control is satisfied, it will unload the compressor(s) and then de-energize the
liquid line solenoid valve(s) SV1 and SV2, causing the valve(s) to close. When the compressor has
pumped most of the refrigerant out of the evaporator and into the condenser, the low pressure
control(s) LP1 and LP2 will open. If the refrigerant leaks into the low side causing the pressure to
close the low pressure controls LP1 and LP2, the compressor will start after a two-hour time delay.
For normal temperature controlled operation, the timer is bypassed and the compressor will start on a
refrigerant pressure rise.
Note:
Do not shut the unit down without going through the pumpdown cycle. Flow switch,
time clock, and ambient lockout thermostat must be wired to allow pumpdown when unit is
turned off.
.
IM ALR ALR 110E through 185E
29
30
ALR 110E through 185E IM ALR
IM ALR ALR 110E through 185E
31
13600 Industrial Park Boulevard, P.O. Box 1551, Minneapolis, MN 55440 USA (612) 553-5330
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