McQuay ALP-045C Installation Manual
TABLE OF CONTENTS
INTRODUCTION
General Description . . . . . . . . . . . . . . . . . . . . . . . . . ...3
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3
INSTALLATION
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4
Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4
Clearance Requirements . . . . . . . . . . . . . . . . . . . . . ...4
Vibration Isolators . . . . . . . . . . . . . . . . . . . . . . . . . ...4.5
REFRIGERANT PIPING
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6
Recommended piping arrangements . . . . . . . . . . . . ...7
Refrigerant piping connections . . . . . . . . . . . . . . . . ...7
Recommended line sizes . . . . . . . . . . . . . . . . . . . . . ...8
Holding charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...8
Pressure testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...8
Leak testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...8
Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...9
Charging the system . . . . . . . . . . . . . . . . . . . . . . . . . ...9
Hot gas bypass components.. . . . . . . . . . . . . . . . . ...9
Refrigerant charge . . . . . . . . . . . . . . . . . . . . . . . . . . ...9
Weight of refrigerant in copper lines.... . . . . . . . . ...9
Pressure-vacuum equivalents . . . . . . . . . . . . . . . . ...10
PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . ...10.11
DIMENSIONAL DATA . . . . . . . . . . . . . . . . . . . . . ...12.13
FIELD WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . ...14.15
Wire sizing ampacities . . . . . . . . . . . . . . . . . . . . . . ...16
Compressor and condenser fan motors . . . . . . . . ...17
Thermostat wiring and capacity reduction . . . ...17.18
Water piping for chilled water applications , . . . . . ...18
Flow switch for chilled water applications . . . . . . . ...18
Evaporator fan interlock
for air handler coil installations . . . . . . . . . . . . . ...19
UNIT LAYOUT&PRINCIPLES OFOPERATION
Major component locations . . . . . . . . . . . . . . . . . . ...19
Control center . . . . . . . . . . . . . . . . . . . . . . . . . . ...19.20
Electrical legend . . . . . . . . . . . . . . . . . . . . . . . . . . . ...21
Unit disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...21
Sequence of operation . . . . . . . . . . . . . . . . . . . . . . ...22
TYPICAL WIRING SCHEMATICS
Power schematics . . . . . . . . . . . . . . . . . . . . . . . ...23-39
Control and safety schematics . . . . . . . . . . . . . ...40-42
Thermostat schematics, . . . . . . . . . . . . . . . . . . ...43-45
Wiring schematic decision tables.. . . . . . . . . . ...46.47
STARTUP&SHUTDOWN
Pre-startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...48
Initial startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...48
Temporary shutdown . . . . . . . . . . . . . . . . . . . . . . . . ...48
Startup after temporary shutdown . . . . . . . . . . . . . ...48
Extended shutdown . . . . . . . . . . . . . . . . . . . . . . . . . ...48
SYSTEM MAINTENANCE
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...49
Fan shaft bearings . . . . . . . . . . . . . . . . . . . . . . . . . ...49
Electrical terminals . . . . . . . . . . . . . . . . . . . . . . . . . ...49
Compressor oil level . . . . . . . . . . . . . . . . . . . . . . . . ...49
Oil Equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...49
Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...49
Refrigerant sightglass . . . . . . . . . . . . . . . . . . . . . . . ...49
SERVICE
Filter-driers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...50
Liquid line solenoid valve . . . . . . . . . . . . . . . . . . . . ...50
Thermostatic expansion valve . . . . . . . . . . . . . . . . ...50
IN-WARRANTY RETURN MATERIAL PROCEDURE
Copeland compressor . . . . . . . . . . . . . . . . . . . . . . . ...51
Components other than compressors . . . . . . . . . . ...51
APPENDIX
Standard Contr61s:
Oil pressure safety control . . . . . . . . . . . . . . . . . . . ...51
High pressure control . . . . . . . . . . . . . . . . . . . . . . . ...52
Low pressure control . . . . . . . . . . . . . . . . . . . . . . . . ...52
FANTROL head pressure control . . . . . . . . . . . ...52.53
Compressor lockout . . . . . . . . . . . . . . . . . . . . . . . . ...53
Compressor motor protector . . . . . . . . . . . . . . . . . . ...53
Optional Controls:
SPEEDTROL head pressure control . . . . . . . . . . . ...54
Compressor unloaders . . . . . . . . . . . . . . . . . . . . . . ...54
Low ambient start . . . . . . . . . . . . . . . . . . . . . . . . . . ...54
High ambient unloader . . . . . . . . . . . . . . . . . . . . . . ...54
Part winding start . . . . . . . . . . . . . . . . . . . . . . . . . . ...54
Phase/voltagemonitor . . . . . . . . . . . . . . . . . . . . . . ...55
Hot gas bypass (field installed) . . . . . . . . . . . . . . . ...55
ALP controls, settings&functions . . . . . . . . . . ...56. 57
Troubleshooting chart . . . . . . . . . . . . . . . . . . . . ...58.59
Page2/lM269
“FanTrol”, “McC!uay”, “
of McQuay Air Conditioning, McOuay International, Minneapolis MN
G 1995 McOuay Air Conditioning. McQuaylnternational. Minneapolis. MN
“Bulletin illustrations cover the general appearance of Mc@ay International products al the time of publica! ior,
and we reserve the right to make changes in design and construction at any time without notice”
SeasonCon” and “SpeedTrol” are registered trademarks
INTRODUCTION
GENERAL DESCRIPTION
McQuay type SeasonCon air cooled water condensing units
are designed for outdoor installations and are compatible with
either air handling or chilled water systems. Each unit is completely assembled and factory wired before evacuation, charging and testing, and comes complete and ready for installation. Each unit “consists of twin air cooled condensers with
integral subcooler sections, multiple accessible hermetic compressors, complete discharge piping and suction connections
for connection to any air or water cooling evaporator.
NOMENCLATURE
INSPECTION
When the equipment is received, all items should be careful-
Iy checked against the bill of lading to insure a complete shipment. All units should be carefully inspected for damage upon
arrival. All shipping damage should be reported to the car-
rier and a claim should
be filed. The unit serial plate should
The electrical control center includes all safety and operating controls necessary for dependable automatic operation
except for the cooling thermostat since this is somewhat
dependent on the unit application. Condenser fan motors are
fused in all three conductor legs and started by their own
three-pole contractors. Compressors are not fused but may
be protected by optional circuit breakers, or by field installed
fused disconnect.
be checked before unloading the unit to be sure that it agrees
with the power supply available. Physical damage to unit after
acceptance is not the responsibility of McQuay.
NOTE: Unit shipping and operating weights are available
in the physical data tables on pages 10 and 11.
INSTALLATION
NOTE: Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes
and regulations, and experienced with this type of equipment.
CAUTION: Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.
HANDLING
Care should be taken to avoid rough handling or shock due
to dropping the unit. Do not push or pull the unit from anything
other than the base, and block the pushing vehicle away from
the unit to prevent damage to the sheetmetal cabinet and end
frame (see Figure 1).
Never allow any part of the unit to fall during unloading or
Figure 1. Suggested Pushing Arrangement
BLOCKING REQ’D.
ACROSS FULL WIDTH
moving as this may result in serious damage.
To lift the unit, 21/2” diameter lifting holes are provided in
the base of the unit. Spreader bars and cables should be arranged to prevent damage to the condenser coils or unit
cabinet (see Figure 2).
Figure 2. Suggested Lifting Arrangement
,,,,,.,, 8,,
FIECOMMENWO
(uSE CAUTION)
MO,,
NUMBER 0, F..%
FROM, H,SO,A. R
U,,(NC METHOD R, MA, NS
THE SAME
LIFT UNIT OWL Y AS SHOWN
(NOTE .0.,,0, 80., ’0,.,,0.,
IM 269 I Page 3
HOLES
LOCATION
Care should be taken in the location of the unit to provide
proper airflow to the condenser, minimizing effects on condensing pressure.
Due to the vertical condenser design of the ALP-120 thru
230 chillers, it is recommended that the unit is oriented so
that prevailing winds blow parallel to the unit length, thus
minimizing the effects on condensing pressure, If it is not practical to orient the unit in this manner, a wind deflector should
be constructed.
Minimum clearances as shown in Figure 3 will prevent most
discharge air recirculation to the condenser which will have
a significant effect on unit performance,
SERVICE
Each end of the unit must be accessible after installation for
periodic service work. Compressors, filter-driers, 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 compressor. Most other
operational, safety and starting controls are located in the unit
control box.
Figure 3. Clearance Requirements ALP-045C thru 230C
6 !7. MIN. CLEARANCE
4 FT. MIN.
CLEARANCE au
FOR SERVICE
ACCESS
I
1
FOR AIR INLET
da
i-~
~ti
I
6 FT. MIN. CLEARANCE
FOR AIR INLET
I
6 FT. MIN.
CLEARANCE
1
FOR AIR
INLET
VIBRATION
Vibration isolators are recommended for all roof mounted installations or wherever vibration transmission is a consideration. Table 1 lists spring isolators for all ALP unit sizes. Figure
4 shows isolator locations in relation to the unit control center.
Figure 5 gives dimensions that are required to secure each
ACCESS
On all ALP units the condenser fans and motors can be
removed from the top of the unit. A complete fan/motor
assembly should be removed for service.
CAUTION: Disconnect all power to unit while servicing
condenser fan drives.
NOTES:
(1)Minimum clearance between units is 12 feet,
(2) Units must not be installed in a pit that is deeper than the height of the unit
(3) Minimum clearance on
each side is 12 feet when installed in a pit.
ISOLATORS
McQuay isolator selection to the mounting surface. Table 3
shows the isolator loads at each location shown in Figure 4,
and the maximum loads for each McQuay selection are
shown in Table 2.
Table 1. Vibration Isolators (Spring)
ISOLATOR LOCATIONS
SUE
045C CP
055c CP
t=!=
------ ..-— — ——, .
Cl CPI.!17 I CP1.W I CP1-28 I CP1-32 I CP1-32 I CF
Iooc,-..-.,- .. --,-..--, ----, - -11OCICP1-32
120C I CP1-27
~ CP2-27
Page 4 I IM 269
CP1-32 CPI-32
CP1-32
CP2-27
CP1-32
CP2-27 CP2-27
CP1-27
CP1-27 CPI-32 CPI-32
CPI-32
CP2-27 CP2-27
‘1-28
CP1-32
Table 2. Spring-flex Isolators
TYPE COLOR
P+.25 RED 4n927A-25
----
tiP1-26
1
CP1-27 ORANGE
CP1-28
I
CP1-31
CPI-32
CP2-25
I
CP2-28
CP2-27
CP2-28
-.
--
CP4-27
I
CP4-28
CP4-31
I
CP4-32 WHITE 580513A-32
i=
I
I
I
I
I
1
MAX.
LOAD
EACN
0-=.)
2200
2400
3000
4400
5200
McOUAY
PART
NUMBER
PURPLE
GREEN
WHITE
GRAY
RED
PURPLE
ORANGE
GREEN
ORANGE
GREEN 58051 3A-26 3600
GRAY
477927A-26
I
477927A-27
477927A-26
I
4n927A-31 1100
4n927A-32
4n929A-25 900
477929A-26
4n929A-27
477929A-26
4n929A-31
4n929A-32 2600
580513A-26
58051 3A-27
I
58051 3A-31
I
450
600
750
900
1300
1200
1500
1800
Figure 4. Isolator Locations
Table 4. Isolator Locations
—c—
1-
6
3
>
Table 3. Isolator 1m=~=
ALP
? UNIT
SIZE 1
: 045C
055C
~ 070C
Osoc
‘ 090C
100C
‘ 11OC
120C
, 135C
, 150C
wbc
185C
: 205C
230C
ISOLATOR LOADS AT SACH FAOUNTING LOCATION (l-SS.)
.“”””
556
706
736
831
859 867
945
986
1135
1279
1327
1376
1423
1569
1643
2
555
687
720
845
934
946
952
1062
1108
1144
1375
1553
1596
3
441
428
466
618
~]
621
806
643
1051
1115
1128
1205
1399
1510
4
556
706
736
631
659
945
986
1135
1279
1327
1378
1423
1569
1643
5
555
687
720
845
867
934
I
946
952
1062
1108
1144
1375
1553
1598
6
441
426
466
618
620
621
806
643
1051
1115
1128
1205
1399
1410
I
I
VIBRATION MOUNT LOCATION DIMENSIONS
Figure5. Spring Isolators
ORDERING NO.
477927A-26 THRU 477927A-32
(INCHES)
ORDERING NO.
477929A-25 THRU 477929A-32
ORDERING NO.
580513A-26 THRU 580513A-32
Ls.oo --- I
1-
7,,0 ~
0,50 Dia.
Positioning
Acoustical No..Skid
Neoprene Pad
Adjust Mounting So Upper
Housing Clears Lower HousinQ
By At Least IW and Not More
2“%Ezili
6
F
Acoustical No..Skid
Neoprene Pad
_ 10.25 .—~
Adjust Mounting so Upper
Housing Clears Lower Housing
By At Least 114” and Not
More Than 1/2”.
~ Acoustical Non:Skid
Neoprene Pad
\
IM 269/ Page 5
REFRIGERANT
PIPING
GENERAL
Piping design, sizing and installation information presented
in ASHRAE Handbooks should, where applicable, be followed
in the design and installation of piping. McQuay type ALP
condensing units are adaptable to either chilled water or air
handling air conditioning applications, The only restriction on
applications is that the evaporator be selected for a system
using refrigerant R-22.
REFRIGERANT PIPING
Piping between the condensing unit and the cooling coil must
be designed and installed to minimize pressure drop, prevent liquid refrigerant carryover to the compressor and to
assure a continuous return of compressor oil from the system.
Piping sketches and tables are not intended to provide information on all of the possible arrangements. For example,
when dual circuit evaporators are used with an unloading
compressor, two liquid line solenoid valves may be used to
reduce coil capacity with compressor unloading. Note
especially that dual circuit evaporators should not be piped
with common liquid and suction lines to more than one compressor circuit. Separate evaporators, evaporator circuits and
piping must be run for each compressor circuit.
Piping recommendations include:
The use of type K or L clean copper tubing. All joints should
1.
be thoroughly cleaned and brazed with high temperature
solder.
2.
Piping sizes should be based on temperature/pressure
limitations as recommended in the following paragraphs,
Under no circumstances should pipe size be based upon
the coil or condensing unit piping connection size.
Suction line piping pressure drop should not exceed the
3.
pressure equivalent of 2° F (3 psi) per 100 feet of equivalent
pipe length. After the suction line size has been determined, the vertical suction risers should be checked to
verify that oil will be carried up the riser and back to the
compressor. The suction line(s) should be pitched in the
direction of refrigerant flow and adequately supported.
Lines should be free draining and fully insulated between
the evaporator(s) and the compressor. Table 7, page 8,
shows piping information for units operating at suction
temperatures between 40F and 45 F and a condenser
entering air temperature of 95F. If operating conditions
are expected to vary substantially from these operating
levels, the pipe sizing should be rechecked.
Vertical suction risers should be checked using Table 5
4.
to determine the minimum tonnage required to carry oil
up suction risers of various sizes:
5. The liquid line should be sized for a pressure drop not to
exceed the pressure equivalent of 2° F (6 psi) saturated
temperature. The liquid line(s) on all units must include
a liquid solenoid valve wired into the circuit as shown on
the applicable unit wiring diagrams.
The control circuit for all compressors has been designed to include a pumpdown cycle. The use of a liquid
line solenoid is required for proper unit operation. In addition, a filter-drier should be located between the liquid
line service valve and the solenoid valve and a combination moisture indicator/sightglass should be located in the
liquid line ahead of the expansion valve.
6.
Suggested piping arrangements are shown on page 7. All
multiple compressor units require a separate refrigerant
circuit for each compressor. The figures shown are for an
air handling installation, but all components shown are
recommended for chilled water vessel installations except
that a refrigerant distributor is not usually required for shell
and-tube evaporators.
7.
If dual suction risers are used:
Double risers are sized so that their combined crosssectional internal area will allow full load unit operation
without excessive pressure drop (see notes, Table 7). Riser
“A” is sized to provide adequate suction gas velocity for
proper oil return at minimum load conditions, This riser
becomes effective only when the trap shown in riser “B”
fills itself with oil. It should be emphasized that the trap
shown in riser “B” should be designed to contain a
minimum internal volume to keep the total system oil requirements at a minimum. Table 7 gives recommended
line sizes for both single and double suction lines and for
liquid lines.
The combined cross-sectional areas of the two risers
a.
must be capable of maintaining adequate refrigerant
velocity for oil return at full unit tonnage,
The extra riser should be of a smaller diameter than
b.
the main riser. The extra riser must include its own trap
at the bottom and should enter the main suction header
at twelve o’clock.
The trap serving the extra riser must be as short as fit-
c.
tings permit. A “U” fitting or the combination of a 90’
standard “L” and a 90C street-L is recommended,
The suction line leaving the coil should also include a
d.
trap if the expansion valve control bulb is to be on the
horizontal section leaving the coil outlet, See the piping sketches on page 7.
Table 5. Minimum tonnage (R-22) to carry oil up
suction riser at 400 F saturated suction.
Min. Tons
NOTE: When compressor minimum tonnage is less than shown in the above
1.50 2.50 3.80 7.60 13.10 204 29.7 41.3
table for a given line size. double suction risers will be required
I
Table 6. Equivalent feet of straight tubing for copper fittings and valves
I
I
I 90” Lono Radius I 1.0 I
.“-
TEES
VALVES
FITTING TYPE
90” Standard
90” Street
45” Standard
A6. .Wrss! 13 15 91 30
-h, .-
Full Size
Reducing
Globe Valve, Open
Gate Valve, Open 0.7
Angle Valve, Open 7.0 9.0
518
I
1.6 2.0
!
2.5 3.2 4.1
0.8 0.9
-.”
1
1.0
I
1.6 2.0
18 22 29
718 1%
2.6 3.3 4.0 5.0 6.0
1.4 I 1.7
“.-
1
1
1.4 1.7 2.3 2.6 3.3
0.9
I 2.3 I 2.6 I 3.
1,3
.,.
1
2.6 3.3 4.0 5.0 6.0
1.0
12
Page 6 I IM 269
1yf 1V*
5.6
1.7
---
38 43 55 69 84
1.5
15 18 24 29 35
6.3
2.1 2.6 3.2
34 45 57 64 7.3 I 85
---
1
1.8 2.3 2.8 3.2
2y* 2%
I
3
8.2
---
1
4.1 5.0 5.9 6.7
10.0 12.0 15.0 17.C
..- ----
,
4.1 5.0 5.9 6.7
31/s 3%
7.5 9.9
4.0
.-. .
!
7.5 9.0
100 120
4.0 4.5
41~
10.0
4.7
10.0
41 47
[
52
..-
Figure 6. SINGLE CIRCUIT EVAPORATOR – RECOMMENDED PIPING
If Row Split Coils Are Used, Duplicate The Piping
CONDENSING UNIT AaOVE THE EVAPORATOR
CONDENSING UNIT BELOW THE EVAPORATOR
LlOU10
TO COIL
“L___
SUCTION TRAP
SHORT AS
FITTINGS PERMIT
1
EXPANSION VALVE
CONTROL BULB
STRAP TO LINE
AND lNSUIATf
SUCTION TRAP ~
SHORT AS
FITTINGS PERMIT
Figure 7. DUAL CIRCUIT EVAPORATOR (FACE SPLIT) – RECOMMENDED PIPING
t
L(
SUCTION TRAP ~
SHORT AS
FITTINGS PERMIT
NOTES:
1. Piping shown is for one compressor circuit; second circuit is similar. Must have separate piping for each compressor circuit.
2. Trap for double suction riser should be as small in horizontal direction as fittings will allow.
3. The thermal expansion valve equalizer line should be placed just past the thermal sensing bulb on the side or top of the pipe.
4. A separate expansion valve is required for each distributor and mounted per manufacturer’s recommendations.
(See additional notes under recommended line sizes, Table 7)
L CXP4NSION VA1bl
CONTROL BULR
5TRAP To LINE
AND INSULATE
ION vALVE
CONTROL BuLBS
STRAP TO LINE
AND INSULATE
REFRIGERANT PIPING CONNECTIONS
Refrigerant piping connections will be made at the com-
pressor end of the unit. Suction and liquid lines should be
routed through the compressor enclosure on each side of the
unit. When piping, allow room for the unit disconnect and field
wiring to the unit. Figures 8 and 9 show piping connections
and sizes for each ALP model.
IM 269 I Page 7
Table 7. Recommended line sizes
COMPRESSOR CIRCUIT #1
ALP
UNIT
SIZE
055C 13&15h
070C
080C
090C
100C 15/&2~h
11OC
120C 2%J—25/8
135C 27+2Y8 3X?
150C
DOUBLE
.A9*_,4
1%-1 ye
1%-15h
15h—21A
I
5~—2y8
15y&2y3
214—25A
170C 21h—25h
1MC 27’s-2y8 31~
205C 21&31~ 3%
230C
NOTES:
Recommended line sizes shown in the above table are based on the unit
operating conditions between 40F and 45 F saturated suction temperature
and condenser entering air temperature of 95F, per 100 ft. equivalent length 4.
of tubing. When design conditions vary, the table values should be rechecked.
1. Liquid and suction lines based on a recommended equivalent pressure
drop of 2F (3 psi for suction line, 6 psi for liquid line) per 100 ft. of
equivalent length,
2. When refrigerant required to charge a circuit exceeds the pumpdown
capacity of that circuit the use of a separate refrigerant storage receiver
will be required. The pumpdown capacity (shown in Table 10) is based
on the condenser 90% full at 90” F.
3. Wherever vertical rise occurs in the suction piping, the minimum tonnage
2%-31~
SINGLE
slJ~*,oN LIQulD
~,,
21h
z~~ 1% 15.3
21A
278
278
25~ 13~
2% 13~
37h 1ye 33.0 58.9
31~
31~
3%
11A
1% 14.7
1ah 16.6 37.6
1ye 21.3
1ye 33.4 66.7
1ye 33.9 73.6 2%-2Y8
1ya 37.9 82.5
1ye 34.4 90.4
21A 35.9
21A 40.0
MINIMUM
PART LOAD
CAPACITY
(TONS)
12.9 19.4
33.2
38.1
FULL LOAD
CAPACITY
(TONS)
23.8
29.0 15/’-21h
42.5 15/+2~h
48.9
56.1
99.8 21/&31~
111.1
COMPRESSOR CIRCUIT #2
DOUBLE SINGLE
,A,9_”
B“ SUCTION
1y&l
5/4
1y&l ya
15/*-21h
1y~—zl~
1y*—21h
2J&278
2J/4-25/a 3%
21&2y~ 37h
21A—25A 3Ys
21&31/s
fer oil entrainment should be checked and where necessary double suction rlsers should be utilized. See Table 5, page 6,
Wherever vertical rise occurs in the suction piping on a system with hot
gas bypass, double suction risers may not be needed as the velocity of
suction gas is increased at minimum load condtions.
Total equivalent feet for a given piping layout must include the equivalent
5
length of straight pipe for fittings, valves and specialties added to the total
run of straight pipe.
Piping design, sizing and installation information presented in ASHRAE
6
Handbooks should, where applicable, be followed in the design and
stallation of piping.
‘QU’D
214 11A 15.5 23.6
21A 11A 18.5 29.1
2% 1ya 17.9 35.3
2% 1Y* 16.6 37.6
2% 1ye 21.3
278 13h X3.2 48.9
278 1ye 38.7 56.1
31A 1ya 33.0 58.9
3%
35h 21A
35h
1ya 33.4 66.7
15~ 339 73.6
1y’ 37.9 82.5
15h 34.4 904
21A
.... .... . ... I I
mlnlmum
PART LOAD
-. -.-—..
GAPAUI I Y
m-)
35.9 998
40.0 111.1
FULL LOAD
CAPACITY
I
(TONS)
42.5
I
in-
HOLDING CHARGE
The Model ALP condensing unit is shipped with a holding
charge of refrigerant. At the time the unit was received a visual
inspection of the unit piping should have been made to be
sure no breakage had occurred or that fittings might have
been loosened. A pressure check should indicate a positive
pressure in the unit. If no pressure is evident, the unit will
have to be leak tested and the leak repaired. This should be
noted and reported to your McQuay sales representative or
freight carrier if the loss is due to shipping damage.
PRESSURE TESTING
No pressure testing is necessary unless damage was in-
Page 8 / IM 269
curred during shipment or rigging, Damage may be determined by a visual inspection of the exterior piping assuming
no breakage has occurred or fittings have loosened, Pressure
gauges should show a positive pressure. If no pressure is
evident on the gauges, a leak has probably occurred releas-
ing all or part of the refrigerant charge, In this case, the unit
should be leak tested to locate the leak.
LEAK TESTING
In the case of loss of the refrigerant holding charge, the unit
should be checked for leaks prior to charging the complete
system. If the full charge was lost, leak testing can be done
by charging the refrigerant into the unit to build the pressure
to approximately 10 psig and adding sufficient dry nitrogen
to bring the pressure to a maximum of 125 psig. The unit
should then be leak tested with a Halide or electronic leak
detector. After making any necessary repair, the system should
be evacuated as described in the following paragraphs.
CAUTION: Do not use oxygen to build up pressure. A
serious explosion could be the result.
EVACUATION
After it has been determined that the unit is tight and there
are no refrigerant leaks, the system should be evacuated. The
use of a vacuum pump with a pumping capacity of approximately 3 cu. ft./min, and the ability to reduce the vacuum
in the unit to at least 1 millimeter (1000 microns) is recommended.
A mercury manometer, electronic or other type of micron
1.
gauge should be connected to the unit at a point remote
from the vacuum pump, For readings below 1 millimeter,
an electronic or other micron gauge should be used.
The triple evacuation method is recommended and is par-
2.
ticularly helpful if the vacuum pump is unable to obtain
the desired 1 millimeter of vacuum. The system is first
evacuated to approximately 29 inches of mercury. Enough
refrigerant vapor is then added to the system to bring the
pressure up to O pounds.
Then the system is once again evacuated to 29 inches of
3.
vacuum. This procedure is repeated three times. This
method can be most effective by holding system pressure
at Opounds for a minimum of 1 hour between evacuations.
The first pull down will remove about 90% of the noncondensibles, the second about 90%0 of that remaining
from the first pull down and after the third only 1/10 of 10%
non-condensibles will remain.
Table 12, page 10, shows the relationship between pressure,
microns, atmospheres, and the boiling point of water.
HOT GAS BYPASS COMPONENTS
McQuay offers a “Hot Gas Bypass Accessory Kit” for each
ALP unit size. Each kit includes a solenoid valve, a hot gas
bypass valve and an instruction drawing. See page 55 for hot
gas bypass operation.
Table 9. Hot gas bypass kits
COMPRESSOR
KIT
S86-580698A-01
866-580898A-01
886-580698A-02
886-5S0898A-01
886-5S0698A-02
886-580898A-01
886-580896A-02
LINE SIZES
%
~8
1IA
%
1*A
%
11A
REFRIGERANT CHARGE
Each ALP condensing unit is designed for use with R-22.
Table 10 lists approximate refrigerant charges for operation
of the unit. Additional refrigerant will be needed for the system
piping and evaporator. Estimated total operating charge should
be calculated before charging system. See Table 11 for weight
of refrigerant in copper lines.
CAUTION: Total operating charge per circuit should not
exceed the condenser pumpdown capacity
per circuit. A
liquid receiver on each refrigerant circuit could be used
in this situation. Refer to the ASHRAE Handbook for the
design and installation of piping and components.
Table 10. Approximate refrigerant charge
CHARGING THE SYSTEM
Model ALP condensing units are leak tested at the factory
and shipped with a holding charge of refrigerant. In the event
the refrigerant charge has been lost due to shipping damage,
the system should be charged with enough refrigerant to raise
the unit pressure to 30 psig after first repairing the leaks and
evacuating the system.
After all refrigerant piping is complete and the system has
1.
been evacuated, it can be charged as described in the
paragraphs following. Connect the refrigerant drum to the
gauge port on the liquid shutoff valve and purge the charging line between the refrigerant cylinder and the valve.
Then open the valve to the mid-position.
2,
If the system is under a vacuum, stand the refrigerant drum
with the connection up and open the drum and break the
vacuum with refrigerant gas.
With a system gas pressure higher than the equivalent of
3.
a freezing temperature, invert the charging cylinder and
elevate the drum above the condenser, With the drum in
this position, valves open and liquid refrigerant will flow
into the condenser. Approximately 75% of the total requirement estimated for the unit can be charged in this manner.
After 75% of the required charge has entered the con-
4.
denser, reconnect the refrigerant drum and charging line
to the suction side of the system. Again purge the connecting line, stand the drum with the connection up, and place
the service valve in the open position.
IMPORTANT At this point charging procedure should be interrupted and prestart checks made before attempting to complete the refrigerant charge. See startup procedures on page
48.
NOTE: It is recommended that the total operating charge per
circuit be stamped on the unit nameplate for future reference.
146
45
45
60
60
60
.-JC
070C
080C
090C
1Ooc
230C
NOTE: Condenser pumpdown capacity is based on ANS1/ASHRAE Standard
15-1976 rating of 90°/0 full of liquid at 900F. To convert values to the older
ARI standard (80% full at 800 F), multiply pumpdown capacity by 0,888.
19 19 45
19 19 45
26 26
26 26 60
26 28
99 99
I
60
60
148
I
Table 11. Weight of refrigerant R-22 in copper lines
(Pounds Per 100 Feet of Type L Tubing)
Weight of Refrigerant, Lba.
0.054 3.84
%
0.100
112
0.162 7.12 .605 .156
%
0.336 24,0 1.26 .323
%
11A 0.573 40.8
1% 0.872
1% 1.237 88.0
2~~ 2.147
25/8 3.312
31~
3% 6.398
4% 8.313 592.0 31.1 8.00
4.728 336.0 17.7 4.55 6.750
7.12 .374 .096
62.1
153,0
236.0 12.4 3.18 4.720
456.0 24.0 6.15 9.140
.202
2.14
3.26 .839
4.62 1.190 1.770
8.04
. . —.
Suction Gee
(Superheated to 65” F)
.052
.550
2,06 3.060
.077
.143
.232
.480
.620
1.250
11.190
I
IM 269 I Page 9
Table 12. Pressure-vacuum equivalents
o
50
100
150
200
300
500
1,000 0.019 759.00
2,000 0.039
4,000 0.078
6,000
8,000 0.156
10,000 0.193
15,000 0.290 745.00 29.330
20,000 0.387
30,000
50,000 0.967
100,000
200,000 3.670 560.00 22.050
600,000
760,000 14.697 0
0 760,00 29.921
0.001 759.95 29.920
0.002
0.003
0.004
0.006 759.70 29.910
0.009
0.117 754.00 29.690
0.580
1.930 860.00 25.980
9.670 260.00 10.240
759.90
759.85
759.80
759.50 29.900
758.00 29.840
756.00 29.760
752.00 29,600
750.00
740.00 29.130
730,00
710.00 27.950
29.920
29.920 1/5,100 —33
29.910
29.880
29.530
28.740
0
PHYSICAL DATA
— —
1/15,200
1/7,600 — 40
1/3,600
1/2,500 — 21
1/1 ,520 — 12
1/760 1
1/380 15
1/189
1/127
1/95
1/76
1/50
1138 72
1125 84
1/15 101
2/1 5 125
114
213 192
1 Atmosphere 212
— 50
— 28
152
29
39
46
52
83
NDITIONS,TONS 0
T CIRCUITS
ER COMPRESSOR
t
C)DTlntd Al CTAC!KIC
“, ,, W! .-L “In”,, .”
CONDENSERS- HIGH EFFICIENCYFIN AND TUSL . ,, - ....,, ....-”..,.- ““””””— .
I
COIL FACE AREA, SQUARE FEET I 28.9 28.9 1 43.3 43.3I433
FINNED HEIGHT
FINS PER INCH
~
CO&NSEiFANS-lili.. . ..... . ... . . .. . .._
NUMBEROF FANS – FAN DIAMETER,INCHES 4–26
NUMBEROF MOTORS– HORSEPOWER 4– 1.0 4– 1.0
FAN AND MOTORRPM 1100
FAN TIP SPEED, FPM 7760
TOTAL UNIT AIRFLOW, CFM 28,460 29,640 42.030
NOTES:
@ Nominal capacity based on 950F ambient air and 450F saturated suction temperature
@ Capacity reduction sequence depends on how the thermostat is connected.
@ Cylinder bore for 50 hp: 2,6875; for 40 hp: 2.9375 (inches).
Cylinder stroke for 50 hp: 2.3438; for 40 hp: 2.1875 (inches).
X FINNED LENGTH, INCHES I4OX1O414OX1O4140x156140x156140x156140x156140x208140x208140x208140x206]40x206 140x208l~x208 140x208
X ROWS D)EEP
IECTDRIVE PROPELLERTYPE
43.0
I
2 2
4 4
I
12.500012.667512.6875 2,9375 2.9375 2.6875 2.6875
0-28-50-78-100 O-27-5C-77-I00
NA NA NA
IF TVDC WITU lhlTC130Al Cl lRf!!l Cm
I 12X2 16x2
52.9
I
25 30 30 35 34
4 4 4
I
.ziwu-r+luu U-z< -sY-u 1- ! w
1 16x2
4–26
1100 1100 1100 1100 1100
7760 7760
I
or
0-28-50-78-100
16x2 j 12X2 16x2I16x2
64.1
2
43.9 [ 58.5
6 6 6 6 6 8 8
or
43.3 I 57.8
6–26 8–26 8–26 8–26 10–.2%
6– 1,0
75.3
I
2
58.5 j58.5 I 585
35 40 40 54 547
2.6875 2,9375 2.9375 2.6675 2..5875
O-3366-83-1OQ
G17-33-50- o-17-32-5c- &25-50-6?- 0-25-50.6S
67-83-100
57.6
16x2I16x2
8– 1.0
7760
54,240 54,240 54,240
65.1
1
2 2 2
K13-8&83-l 00 0.25-50-75-103 O-25-5C-75-1OO
67-83-100 75-88-1oo 75-88-1OC
I 57.6 57.8 I 57.8 57.8 1 57.8
16x2 1 16x2 16x2 [ 12X3
8–1.0
7760 7760
97.7
I
I 585 5&5 1862 I 862
8– 1.0
112.1
I
608C
88
2.9375 2.9375
EM
10– 1.0
llCO
n60
62.CCO
1
57.8
12x3
I
Page
10 / IM 269
Table 14.
1200
Of&l I ckt.2 I CkLl I ckt.2
UNIT CAPACllY@ARlCONDITIONS,(TONS)@
NUMBEROF REFRIGERANTCIRCUITS
UNIT OPERATING[
PUMPDOWNCAPACITY, 900/0FULL @ 90”F
CABINET DIMENSIONS,L X W X H, INCHES
UNIT WEIGHT, LBS.
ADD’L WEIGHT IF COPPERFINNED COILS, LBS.
: COfdPfE880f?8 - COPELAMETICFULLY AGGRiWI%t
NOMINALHORSEPOWER
NUMBEROF CYLINDERS PER COMPRESSOR
CYLINDERBORE, INCHES
CYLINDERSTROKE, INCHES
OIL CHARGE PER COMPRESSOR
~ CAPACITY REDUCTIONSTEPS - PERCENTOF COMPRESSORDISPLACEMF”’
STANDARDSTAGING
I
) HEIGHT X FINNED LENGTH, INCHES ~0 X206~0 X206~0 X208180 X208~0 X208160X206~0 X208180X2C
CHARGE,LBS. R-22
. ... . .. . ... . .. --------- - --. ., ..--. .—. -
117.8 1334> 147.2
56.1 ] 56.1 70.2
86.2 86.2 141
229X83X 59 229X83X 92
5860 6783 7099
stmi.ntnsmIw
35-25
8-4
2.6875 2.6875
=1211375 ]2187512167521875121675121875 12~875lNote3INote312~ 12~
~60-1361160-136 ~6Ll136~
0-13-60-80-100 or
I
.,,\
2
1103 1236
35-25 35-25
6-4 6-4
2.6875
.“7.
U-L(-55-73-1OO
0-27-55-82-100
I1400CAC
ALP MODELNUMBEN
135C 150C
EI+T(NOTE Q
Cftt.1 I CW2 1 Cfrt.1 I CM.2
—
2. 2
70.2 )0.4 70,4 73.2 73.2
141 141 ‘1 .141 141
229X83X 92 229X83X 92 229X83X 92 263X83X 92 263X83X 92
1388
35-35 35-35
6-6
6-6
2.6675 2.6875
0-25-50-75-100
40-40 40-40
35-35
6-6 6-6 8-8 8-6 6-6 8-8
2.9375 2.9375
2.6675
170C
164.9
2 2
141
\7299
1388, 2060
0-17-33-42- 0-14-27-41-
50-75-100 54-77-100
105C
Cfd.1 ckt.2
~
180.8
88.5 98.5 96.5 98.8
68.5
203 203
6005
50-40 50-50
50-40
Note 3 2.6875 2.6675
Note 3
2060 220C’
Cld.1 ckr.2 Ckt.1 citt.2
~
199.5 222.1
230
9081 9301
2429 2429
0-12-24-37- 0-13-25-37-
49-73-100
~
2 2
I 98.8
230 I 230
230
50-50
60-60
8-6 8-8 M
2.9375
2.3436 2.3438
50-75-100
60-80
2.9375
TOTAL UNIT AIRFLOW, CFM
I
NOTES:
0 Nominal capacity based on 95°F ambient air and 45°F saturated auction temperature.
@ Capacity reduction sequence depends on how the thermostat is connected.
COCylinder bore for 50 hp: 2.6875; for 40 hp: 2.9375 (inches)
Cylinder stroke for 50 hp: 2.3438; for 40 hp: 2.1875 (inches)
62,000
I
76,500
I
87,480
I
67,480
I
81,960
I
Table 15. Major Components
COMPRESSOR CONTACTOR DESIGNATION FOR COMPRESSOR
4D-20 hp
4D-25 hp
4D-30 hp 6D-35 hp
Eli
..
090C
1Ooc
I1OC
Osoc
6D-35 hp
I
6D-40 hp
8D-50 hp
I
BD-60 hp
120C 6D-35 hp
135C
150C 6D-35 hp
w$:$~k.i,
...
NOTES:
1. All units have two independent refrigerant systems.
2. Compressors 1 and 3 used on Circuit 1 of 4-compressor units. Compressors 2 and 4 used on Circuit 2 of 4-compressor units.
3. Compressors 3 and 4 of 4-compressor units do not use unloaders.
G:. ,.
-$’”*W “t ..’5:.$% “ $
6D-35 hp
6D-40 hp
I
8D-50 hp
6D-50 hp
1
6D-60 hp
4D-25 hp
4D-30 hp
6L-W” ,IV
I
6D-40 hp ] —
8D-50 hp
6D-60 hp ] —
6D-35 hp
6D-35 hp
6D-35 hp 6D-35 hp ] 6D
8D-40 hp 6D-40 hp
6D-40 hp 8D-50 hp
6D-50 hp 8D-50 hp
8D-60 hp 8D-60 hp
—
—
—
1 1 1
— —
4D-25 hp
—
—
—
—
—
4D-25 hp
)-35 hp
6D-40 hp
6D-40 hp MI–M5 M2—M6
8D-50 hp
8D-60 hp
M1—M5 M2—M6 —
MI—M5
M1—M5 M2—M6 —
Mi—MK
,.! . . , ...- ..M1—M5 M2
MI—M5 M2—M6 —
I
MI–M5 M2—M6 —
MI—M5 M2—M6 I —
I
MI—M5 M2—M6 M3—M7
M1—M5 M2—M6
MI–M5 M2–M6
M1—M5 M2—M6
1
MI—M5 M2—M6
M2—M6 —
M7—M6
&flJ6 — —
95,820
I
M3—M7 M4—M6
M3—M7 M4—M8
M3–M7 M4—M6
M3–M7 M4—M6
M3–M7 M4—M8
I
— —
,
95,620
—
—
—
—
—
—
M4—M8
1
!
1
1
IM 269 / Page 11
1
Figure 8. Dimensional Data — ALP-045C thru 120C
~ 2.5
,—
ABINET
DIA. LIFTING HOLES
AIR
DISCHARGE
\
t
\
,o~
Eli/
Lli J
2.0 TYP. -’~
SPACING FOR
1.00. DIA
ISOLATOR
MOUNTING
HOLES (6)
II
Mac
Ossc
070c
Oaoc
Osoc
100C 226.7
11OC 226.7 5.7
120C
122.7
175.7
175.7
228.7 7.2 7.2 22.6
228.7 7.2
226.7
39.2
9.0
9.5
8.7
5.7
9.0 21.6
8.7 22.6
7.2 22.6
7.2 24.6
5.7 27.2
5.7 27.2
39.2 23.6
22,3 38.3
22.6 43.6
22,6 43.6
22.6 46.5
24,6 46.5
27.2 46,5
27.2 46.5
23.8 97.5
11OC
120C
00
00
00
00
00
El
61,6 22,8
43,6 52,2
43.6 52,2
46.5 52,2
46.5 52,2
46,5 52.2
46,5 52.2
97,5 93.7
FAN ARRANGEMENTS
080C
090C
1Ooc
070C
00
00
00
El
1ye
15h 2%
21A 2%
21A 21/i
21A 21A
25A
2%
25h
1ye
278
278
2%
055C
00
00
1
045C
o
00
El
%
%
7%
%
% %
7%
11A
11A
CENTEROF lSOIATOR
7/8
%
%
7/8
‘h
1~~
11A
51.0
65.0
66.0
64.0
63.0
80.0
81.0
85.9
13.0 43.0
13.0 58.0
13.0 58.0
13.0 58.0
13.0 58.0
13.0 56.0
13.0 58.0
13.0 58.0
109.0
162.0
162.0
215.0
215.0
215.0
215.0
215.0
Page 12/ IM 269
Figure 9. Dimensional
CONTROL
CENTER
..
lid
1-8-’4
cONTROL POWERENTRY
KNOCKOUTFOR !4If CONDUIT,
BOTHSIDES OF UNIT
— ALP-135C thru 230C
Data
1
r
8
+
v
2.5,1 DIA. LIFTING HOLES
FAN ARRANGEMENTS
150C
135C
———
170C
185C
00
00
00
00
00
B
205C
230C
00
::
00
00
00
00
%
II 4
CKT. 2 SUCTION
CONNECTION,2%11
(4)
Dimensions in Inches
AK!
DISCHARGE
t
/
+~ 2.O’TYP.
SPACINGFOR
1.00~ DIA.
iSOiATOR
MOUNTING
HOLES(6)
LENGTH ‘ “.
:
23SC
B
263.4
263.4
B ‘. ~ 6 ‘ ;.3 :’ “
39.0
39.0
24.6
24.6
101.4
100.3
ISOLA’TO,RLOCATIONS
ii ‘ ‘
13.0
13.0
“,.:”’.s-’’ ,”:
95.0
95.0
.T
249.7
249.7
IM 269 / Page 13
FIELD WIRING
Wring must comply with all applicable codes and ordinances.
Warranty is voided if wiring is not in accordance with specifications. An open fuse indicates a short, ground or overload.
Before replacing a fuse or restarting a compressor or fan
motor, the trouble must be found and corrected.
Copper wire is required for all power lead terminations at
the unit while either aluminum or copper can be used for all
other wiring.
ALP 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
block or non-fused disconnect switch is provided and wiring
within the unit is sized
in accordance with the National Elec-
large power terminal
trical Code. A single field supplied disconnect is required,
An optional factory mounted transformer may be provided,
If multiple point wiring is ordered, three power connections,
Figure 10. Typical field wiring diagram for ALP-045C
L),,mnn,d
,Ph,––-r,l--r,l
BK
~“w::z:::---~;j;j
By O!her.
Termna-
PB 1
U“,!Ma!”
Bl,ck
one per compressor circuit plus one for condenser fans, are
required and wiring with the unit is sized in accordance with
the National Electrical Code. Separate field supplied discon-
nects 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.
CAUTION: Internal power wiring to the compressors for
the single point versus the the multiple point option are different. It is imperative that the proper field wiring be installed according to the way the unit is built.
Figures 10, 11 and 12 show typical field wiring that is required for unit installation, Items that require field wiring are
liquid line solenoids (SVI and SV2), optional hot gas bypass
solenoid (SV5) and the cooling thermostat as well as the unit
power supply.
— 080C with 4 steps of capacity control
Condense,U.(I Comrx-m”
1
●nd Fan
T
T
M.!ors
F.,,(F,]
L..i—,
cont..! stop
SW!ch,,,,
,
6
t
510
L
T,rm<na!, For
T1’,mmsta!s
8 yl+
2!3
slag, 4 G+ >N;
Co”d,n,>ngU“ 1
control,
236
.
I
PSI ,,,
,,2
~—@+w&”-–@Y ---
‘Lp’Occ’’OcO”” la”””’
camp, .1
217
0
c
Page 14 / IM 269
●NOTE: Standard M separate Pcwr supply c,rcaI1s for ccc:rols
LEGEND:
@ FIELD WIRING TERFIINAL
———
— FACTORY WIPING
‘-— OPTIONAL FACTORv WIRING
FIELD WIRING
BK BLACK WIRING (LINE)
WHITE WIRING (NEUTRAL)
WH
Figure11.Typicalfield wiring diagram for ALP-080C –
10C with 6 steps of
capacitycontrol
D!mmcec!
B, Olht.
—
.--” . . ...%
ml
Si’+-:-::--?: ! :
CO.,*
stop
S.”ch,e%)
~
Nom mm.”.w!m. m .?4
5?0 m 0“.,.11 t,-.
dock .“d !!0. ,.,,,.
6
t
570
L-#J;.i ~ 2aii.-e-.jNn
m 1
U“ll u.,.
TWm..( B-k
—--—
..-’3,”.!!
_ ,
~
T
h
OPI’.”.,~“-
Ca.tr.i Tr..,tc.me!
1
C.tatncec “.<1 C.m,re’t.m
I
. . . F.. ..,.-
I
---—--i”
----4
Figure 12. Typical field wiring diagram for ALP-120C –
ym;:w. ,OA m-
i
—*W m
NOTE: For ALP-120C, 135C,
and 150C, R3 and R4 would
replace the compressor un-
loaders for compressors 3 and
4 of those size units. See page
43 for a typical diagram.
?’(9a No,.)
,.” p,,
L.i —, —,
4
‘aMld Stw
S“llchl”)
s
?
~ NOTE R.Mv. .1”. - .“d
—.-—--
s, 0,.,.,,.11 ,he
dock sw lb. ,wl,ch
Stm
2
Stw.e 3
w+- ‘z
CW2
213
Stls+ 4
(+ ~c- ‘~
,13
S,qw 5
@:I-o- Y
230C with 8 steps of capacity control
~+TF&y_
w
ml
C4nds.sing U“(I
Cantmh
R78
R17
ALP , 8SC–2W Only
117
Y
I
L
..—
c-w .,
,8
IB
Sting. 6
SW.9 7
SW+ a
IM 269 / Page 15
Table 16. Wire Sizing Ampacities
3PH, 60 HZ
ALP MODEL
045C
055C
070C
090C
1Ooc
Iloc
120C
135C
150C
170C
185C
205C
230C
ELEC. POWER
POWER SUPPLY O
208
230 184
460 @
208 1 278
208
230
5ktt
T
208 412
230 412
460 @ 207
460 (B
575 203
208
230
460 ~
575 222
206 708
230
4600
575 266
208 767
230 767
460 @
575
206
230
460 @
575
Single Point
Power Supply
r
m
184
I
I 93
292
292
I
246
533
533
267
652
331
385
314
926
926
455
373
I
WIRE SIZE AMPS @
Muitlple Point Power Supply O
Elec. Ckt. 1 Elec. Ckt. 2 Elec. CM. 3
Fene & tintrols Cornpr.Cti. 1 hmpf. m. 2
25.6 79
25.6
12.8
12.7
25.6 96 133
25.6
12.6 49 66
12.7 39
33.6 I 133 140
33.6
16,8
16,7 45
41.6
41.6 140
20.8 70
21,5
41.6
41.6 175 175 (1) 3“
20.6
21.5
41.6
41.6 221
20.8 110 110 (1) 2V2°
50.6 217
25.3
26.3
50.6 217
50.6
25.3
26.3
58.6 252 252 (1) 4“
58.6 252
29.3 126 126 (1) 21/2“
30.7 101 101
58.6
58.6 315 315 (2) 3“
29.3 160 160 (1) 3“
30.7
56.6 359 359 (2) 3“
58.6 346
29.3 175 175 (1) 3“
66.6 452 452 (2j 4“
33.3 225 225 (1) 4“
35.6 180
79
39 49 (1) 11/’4”
I
33 39
96
133
66 70
140
I
56 56
191
I
69 69
66
221 221
109 109 (1) 2v2 “
87 87
217
109
I
87
344
I
122 122
96
96
I
133 (1) 23/2”
45
140
56
140
140
I
70
191
I
68
221
217
252
252
126 (1) ZV2°
I
101
252
344
I
346
180 (1) 3“
POWER ENTRY HUB
I
QUANTIYY & i
I
Slngb Point
Power Supply
I
(1) 2“
ilj 2
I
‘l’ ,,,
(1) 23/2”
(1) 11A”
(Ij IIA,I
I
[1)2M”
{lj 2Th”
(1) lvz”
(1) l!~,,
(1)2V2“
(1) 2V2“
I
~1j 1VZ”
(1) 11/4,,
(1) 3“
I
~lj 2
1) 11/2”
1(
(1) 4“
(1) 4“
I
~lj 4!s
(1) 2“
(1) 49’
ilj 4’
I
‘1’ 2<,
(1) 4“
(1) 21/2,,
(2) 3“
I
21/2,,
~1j
(2) 3“
mm. Point
Power supply
(1) 2“
(1) 2“
(1)
l%”
~lj lIA.
(1) 272”
(1) 27/2“
(1)lYz”
11) 11~”
(1) 3“
(1) 3“
(1) 2’”
Jl) 1
1/2,,
(1) 3“
(1) 3“
(;) :“
(1) 4“
(1) 4“
(1) 2“
, 2.,
(1) 4“
(1) 4“
(1) 21/2“
(lj 2v2 r’
(2) 21A” (1) 1“
(2) 2Y2“ (1) 1 “
(1) 2V2“
jl j 21/2,,
(2) 2“ (1) 1’”
(2) 2“ (1) 1“
(1) 21/2“
(1) 21/2“
(1)1’’(1)2’’(1)2 ?>”
(1)1’’(1)2’’(1)2Y”
(1) 2Vz”
~lj z~hn
(1)1“(2) 2V2“
(1) 1“ (2)
(1)
(1) 21,2,,
(1) 1“ (2) 3“
(1) 1“ (2)3”
[1) 3“
[1) 21/2”
[1) 1“ (2) 3“
(1) 1“ (2) 3“
ilj 3
[1) 1“ (2) 3“
[1) 1“ (2) 3“’
[1) 4’”
[1) 3~/’2“
:1) 1“ (2) 4“
:1) 1“ (2) 4“
‘1) 4“
;1) 4“
2Y, “
3“
I
ELECTRICAL DATA NOTES
0 ALLOWABLE VOLTAGE LIMITS:
Unit nameplate 208V/60Hz/3Ph: 187V to 253V
(except ALP-090C: 180V to 220V)
Unit nameplate 230V/60Hz/3Ph: 187V to 253V
(except ALP-090C: 207U to 253V)
Unit nameplate 460V/60Hz/3Ph: 414V to 506V
Unit nameplate 575V/60Hz/3Ph: 517V to 633V
Unit nemerYate 360V/50Hz/3Ph: 342V to 418V
@ Compressor RLA values are for wire sizing purposes only and do not reflect
normal operating current draw If unit is equipped with SPEEDTROL motors,
the first motor on each refrigerant circuit is a 230V single phase, 1 hp
RLA of 5.6 amps
with an
@ Compressor LRA for part winding start are for the first winding. If the unit
Page 16 / IM 269
motor,
is equipped with SPEEDTROL motors, the first motor on each refrigerant
circuit is a 230V single phae, 1 hp motor, with an LRA of 145 amps
Unit wire size amps are equal to 125% of the largest compressor-motor
(!3
RLA plus 100o1oof RL4 of
transformer Wre size amps for separate 115V control circuit po;er is 12
amps for all units shown.
o
Quantity and size of power entry hub(s) provided with unit
E’
Single fxJint ~wer supply requires a single fused disconnect to supply electrical power to the unit.
Multiple point power supply requires three independent power circuits with
CL
separate fused disconnects
Data also applies to 380V/50Hz/3Ph units
@
all other loads in the circuit includnq control
Table 17. Compressor and Condenser Fan Motors
XEO ROTOR AMPS @
COMPRESSORS
056C
“ 070C
080c
beoc
100C
11OC
.1200 ““”
f35c
160C
170C
185C
206C
Z30C
,.,’
(1) 31 (1) 39
208 (4) 4.0
230 (4) 4.0
4600
575
208 (6) 4.0
230 (6) 4.0
46063 (6) 2.0
575 (6) 2.2
208 (8) 4.0
230 (8) 4.0
460 @ (6) 2.0
575 (6) 2.2
206
230 (6) 4.0
460 @ (6) 2.0
575 (8) 2.2
208 (8) 4.0
230
460 @ (8) 2.0
575
I
208 (lo) 4.0
230
. .
460 @ (lo) 2.0
575
208
230 (lo) 4.0
460 @ (lo) 2.0
575
208 (lo) 4.0
230
460 @
575
208
230 (12) 4.0
460 @ (12) 2.0
575
208 (12) 4.0
230 (12) 4.0
460 @ (12) 2.0
575
206
230 (12) 4.0
460 @ (12) 2.0
575
208 (14) 4.0
230
460 @ (14) 2.0
575
208 (14) 4.0
230 (14) 4.0
460 @ (14) 2.0
575 (14) 2.2
(4) 2.0
(4) 2.2
(8) 4.0
(8) 4.0
(8) 1.6
I
(lo) 4.0
(10) 1.6
(lo) 4.0
(1o) 2.2
(lo) 2.0
(lo) 2.0
(lo) 2.2
(12) 4.0
(12) 2.2
(12) 2.2
(12) 4.0
(12) 2.2
(14) 4.0
(14) 2.2
REFER TO PAGE 16 FOR ELECTRICAL DATA NOTES
(1) 26 (1) 31
(1) 77 (1) 106
(1)77 (1) 106
(1) 39 (1) 53
(1) 31 (1) 36 10.3
(1) 106 (1) 112
(1) 106(1) 112
(1) 53 (1) 56 9.9
(1) 36 (1) 45 10.3
(2) 112
(2j 112
(2) 56
%--t-ik
i2i 71
m
{2j 66
(2) 201
(2) 201 17.0
%--HE
(2j 56 (2j 39
(2) 45 (2) 31 10.3
w--l--+
i4i 56
(4j 45
(4)
153
h--l-+
m
I
I
I
I
I
I
10.3
17.0
17.0
17.0
17.0
17.0
17.0
17.0
9.9
9.9
10.3
17.0
9.9
9.9
9.9
9.9
7.9
-
(2j 565
(2) 283 (2) 156
{2j 405
(2) 1070
(2) 1070 (2) 656
(2j 565 (2j 428 @j 340 @j 250
(2) 283 (2) 214
(2) 230 (2) 172
(3) 565 (1) 426
(3) 565 (1) 428 (3) 340 (1) 250
(3) 283 (1) 214 (3) 156 (1) 117
(3) 230 (1) 172 (3) 138 (1) 103
(4) 565
(4) 565 (4) 230
i4i 283
i4j 230 i4j 138
(4) 660 (4) 400
(zj340
I
(2j 262
(2) 654
(2) 156(2) 117
(2) 138 (2) 103
(3) 340 (1) 250
(4) 340
I i4i 156
km--l-L
i4j 510 I i~ 330
m
THERMOSTAT WIRING
Since it is impossible for McQuay to anticipate the type of
installation that an ALP condensing unit maybe used on, we mostat so that as successive stages of cooling are called for,
do not provide a thermostat. We do, however, provide the compressors in the unit will be started to alternately innumbered terminals inside the unit control center to which
a thermostat maybe connected. These terminals are shown
and labeled “Terminals For Thermostat” on the electrical show typical staging sequences for 4, 6 and 8 step
schematics. thermostats.
On a two-circuit unit it is important to connect the ther-
crease the condenser load from refrigerant circuit 1 to circuit 2. This is illustrated in Table 17. Figures 10, 11 and 12
IM 269 / Page 17
Table 18. Capacity reduction
UNIT WrTH STANDARD
ELECTRICAL COMPONENT
ENERGIZED SUCTION PRESSURE CONTROLLED
I
UNIT
ALP
SIZE
Svl +Ul
45C, 055C
070C
Sot, Oeoc SVl+Comp. l, U2(Ul da-energized)
Ooc,
20C, 135C SVI + Comp. 1 (UI, U2 de-energized)
150C SV2 + Comp. 2 (U1, U2 de-energized)
70C,
05C, 230C
NOTES:
1. Compressor staging for units with suction pressure controlled unloaders and unloaders controlled from a remote source (discharge air, return water, efc ) is the same
2. See page 54 for more information on unloaders controlled from suction pressure.
SV2 + U2
SV1 (Ul de-energized)
SV2 (U2 de-energized)
SV1 +Comp. 1, Ul, U2
SV2 +Comp. 2, Ul, U2
11OC SV2+Comp.2, U2(Ul da-energized)
SVl+Comp, 1 (Ul, U2 de-energized)
SV2 + Comp, 2 (Ul, U2 de-energized)
SVI +Comp, 1, Ul, U2
SV2 +Comp. 2, Ul, U2
SVI + Comp. 1 + Comp. 3 (R3 energized)
SV2 + Comp. 2 + Comp. 4 (R4 energized)
SV1 +Comp. 1, I-H, U2
SV2+Comn. 2. U1. U2
SV1 + Comp, 1 (U1, U2 de-energized)
SV2 + Comp. 2 (Ul, U2 de-energized)
1S5C
SV1 + Comp. 1, U1, U2 + Comp. 3 (R3 energized)
SV2 + Comp. 2, UI, U2 + Comp. 4 (R4 energized)
SV1 + Comp. 1 + Comp. 3 (Ul, U2 de-energized)
SV2 + Comp. 2 + Comp. 4 (Ul, U2 de-energized)
I
1
CAPACITY REDUCTION
I
UNLOADERS
Stage 1
Stage 2
Stage 3
Stage 4
Stage 1
Stage 2
—
—
Stage 3 Stage 5
Stage 4 Stage 6
Staga 1 Stage 1
Stage 2
—
—
Stage 3
Stage 4 Stage 6
Stage 1
Staoe 2
Stage 3 Stage 3
Stage 4
—
—
Stage 5
Stage 6
1
I
UNtTS WITH OPTiONAL
CAPACITV REDUCTION
—
—
—
—
Stage 1
Stage 2
Stage 3
Stage 4
Stage 2
Stage 3
Stage 4
Stage 5
Stage 1
Staae 2
Stage 4
Stage 5
Stage 6
Stage 7
Stage 6
WATER PIPiNG FOR CHILLED WATER APPLICATIONS
Due to the variety of piping practices, it is advisable to follow the recommendations of local
authorities. They can supply the installer with the proper building and safety codes required
for a safe and proper installation.
FLOW SWITCH FOR CHILLED WATER APPLICATIONS
A WATER FLOW SWITCH MUST BE MOUNTED in either
the entering or leaving water line to insure that there will be
adequate water flow and cooling load to the evaporator before
the unit can start. This will safeguard against slugging the
compressors on startup. it also serves to shut down the unit
in the event that water flow is interrupted to guard against
evaporator freeze-up.
A flow switch is available from McQuay under ordering
number 860-175033B-O0. it is a “paddle” type switch and
adaptable to any pipe size from 1” to 6“ nominal. Certain
Table 19. Flow switch minimum flow rates
NOMINAL PIPE SIZE
I
i
I
(INCHES) ACTIVATE SWITCH (GPh3)
1
11A
11/2
2
21/2
3 30.00
4 39.70
5 58.70
6 79.20
MINIMUM REQUIRED FLOW TO
I
6.00
9.80
12,70
I
18.80
24.30
minimum flow rates are required to close the switch and are
listed in Table 18. installation should be as shown in Figure
13.
Electrical connections in the unit control center should be
made at terminals 5 and 6. The normally open contacts of
the flow switch should be wired between these two terminals.
There is also a set of normally closed contacts on the switch
that could be used
dicate when a “no
Figure 13.
I
for an indicator light or an alarm to inflow” condition exists.
Flow Oireclion
1.00 NPT FIOW Switch
L,,,,, 0,. -M”,rn”nl
Switch
Aiter
~ 5 Pipe Oia -Minimum
eefore %ftch
Page 18 I iM 269