McQuay SWP 018, SWP 023, SWP 028, SWP 035, SWP 040 Installation Manual
...
Installation and Maintenance IM-708
Self-contained Air Conditioning System
Type SWP Vintage Sizes 18D thru 95D, 105E
MEA
Group: Applied Systems
Part Number: IM708
Date: February 2002
368-93-E
© 2001 McQuay International
Table of Contents
Introduction
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SWP-055-D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vibration Isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Setting Factory Supplied Plenum. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Location/Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Removal of Shipping Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Water Connections . . . . . . . . . . . . . . . . . . . . . . . . . 6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Condenser Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Condensate Drain Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Supply Air. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Return Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . 11
Unit Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Unit Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Return Air and Outside Air Sensor. . . . . . . . . . . . . . . . . . . . . . . . . 14
Supply Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Lug Sizes For Single Disconnect or Power Block . . . . . . . . . . . . . 16
Control Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electrical Legend . . . . . . . . . . . . . . . . . . . . . . . . . 18
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . 19
Figure 19. Power Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 20. Input Schematic, Discharge Air Control (DAC). . . . . . . 20
Figure 21. Input Schematic, Zone or Space Comfort Control (SCC) 21
Figure 22. Output Schematic, Actuator Control . . . . . . . . . . . . . . 22
Figure 23. Output Schematic, Auxiliary Fan Start/Stop Control . . 23
Figure 24. Output Schematic, Actuator Control . . . . . . . . . . . . . . 24
Figure 25. Output Schematic, Compressor Control (4 Compressors/4,
5 or 6 Stage) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 26. Output Schematic, Compressor Control (6 Compressors /
6 Stage) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Standard Controls . . . . . . . . . . . . . . . . . . . . . . . . . 27
High Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Low Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Compressor Motor Protector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Proof of Airflow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Frost Protection Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Clogged Filter Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Unit Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Duct High Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Phase Fail/Under Voltage Protection . . . . . . . . . . . . . . . . . . . . . . 28
Duct Static Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Mounting instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Building Static Pressure Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Building pressurization applications . . . . . . . . . . . . . . . . . . . . 29
Freezestat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Condenser Water Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Water Side Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Condenser Water, Head Pressure Control. . . . . . . . . . . . . . . . . . . 30
Variable Inlet Vanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Adjustable Frequency Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Disconnect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Dual Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Battery Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Hot Water Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
System Check, Test and Start . . . . . . . . . . . . . . . 31
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Pre Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Fan start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Compressor start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Economizer start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Hot water start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Expansion valve superheat adjustment . . . . . . . . . . . . . . . . . 32
Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Variable air volume (VAV) start-up . . . . . . . . . . . . . . . . . . . . 34
Rpm changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Drive sheave alignment and belt tension . . . . . . . . . . . . . . . . 34
Final control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Maintaining control parameter records . . . . . . . . . . . . . . . . . 35
System Maintenance . . . . . . . . . . . . . . . . . . . . . . . 36
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Motor Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . 37
Service and Warranty Procedure . . . . . . . . . . . . . 38
In Warranty Return Material Procedure . . . . . . . . . . . . . . . . . . . . . 38
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Product Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Check, Test and Start Procedure Form . . . . . . . . 39
Copyright © 2001 McQuay International. All rights reserved throughout the world.
2 IM708
Introduction
General Description
Models SWP018 through 105 are factory assembled, refrigerant charged and tested, water cooled packaged air conditioning units designed for ducted applications.
Each unit contains multiple hermetic compressors, water
cooled condensers, multi-circuit evaporator, thermal expansion valves, interconnecting refrigerant piping, forward
curved centrifugal fan, belt drive, fan motor, pleated filters
and all necessary operating and safety controls.
All rigging, installation, power and control wiring external to
the unit, and condenser water and condensate piping are the
responsibility of the installer.
The MicroTech II self-contained unit controller is standard
equipment. For a detailed description of the MicroTech II
components, input/output configurations, field wiring
options and requirements, and service procedures, refer to
Bulletin No. IM 710, "MicroTech II Self-contained Unit
Controller." For a description of operation and information
on using and programming the MicroTech II unit controller,
refer to the appropriate operation manual (see Table 1).
Table 1: Self-contained unit operation manual literature
UNIT CONTROL
CONFIGURATION
Variable Air Volume (VAV)
Discharge Air Control (DAC)
Constant Air Volume
Space Comfort Control (SCC)
Constant Air Volume
Discharge Air Control (DAC)
OPERATION MANUAL
BULLETIN NUMBER
OM711
OM712
OM711
Inspection
When the equipment is received, all items should be carefully checked against the bill of lading to insure a complete
shipment. The shipping receipt should not be signed until all
items have been accounted for. All units should be carefully
inspected for damage upon arrival. All shipping damage
should be reported to the carrier and a claim filed. The unit
serial plate should be checked before unloading the unit to be
sure that it agrees with the power supply available.
Nomenclature
SWP-055-D
Self-contained
Water cooled
Plenum discharge
IM708 3
Vintage
Nominal tons
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
Units are shipped with a protective covering which should
remain in place while the unit is being moved to its final
location. Note: Check for concealed damage as soon as possible.
Never allow any part of the unit to fall during unloading or
moving as this may result in serious damage. Units are provided with lifting lugs for rigging with a crane. If units are
lifted by crane, protection against chaffing damage by slings
or cable must be provided and spreader bars must be used
across the top of the cabinet to prevent any structural damage
to the frame.
The unit base frame will accept dollies or Johnson bars for
transporting the unit. Furniture dollies can be placed at both
ends of the chassis or at one end and a Johnson bar used at
the other end for maneuvering.
CAUTION
required. Foam rubber gasket is provided around the perimeter of unit top. Carefully set plenum. Attach with mounting
hardware provided with the plenum.
Location/Service Access
For good installation, service and maintenance access the
following recommended clearances should be followed.
Minimum clearances required by local, state, or federal
codes, such as the NEC take precedence over those listed
below. Clearance is required to allow room for side filter
access, mechanical cleaning of the condenser tubes and
economizer coil, access to expansion valves and other control components and to allow for possible fan shaft or compressor removal.
Unit front - 42"
Unit rear - 24"
Motor location side - 36"
Piping location side - 36"
Side without motor or piping -24"
Figure1. Recommended Service and Maintenance
Clearance
Airflow
24"
Do not attempt to install dollies in the center of the unit.
CAUTION
Units must not be moved in an upended position.
Floor surfaces must be protected when equipment is moved
across finished flooring. Plywood sheeting may be used to
protect surfaces and distribute weight loading.
Vibration Isolators
All units are provided with 1” neoprene isolation pads,
shipped separately. Pads are to be installed beneath the unit
and located at each corner and the center of each base channel. For units provided with more than six (6) isolator pads,
evenly space the additional pads under the front and rear
base channels.
Setting Factory Supplied Plenum
If the unit is provided with a factory plenum for field mounting, a forklift, slings or other suitable lifting means is
Evapora tor C oil
24"
or
36"
Compressors
1
35642
VFD
42"
36"
Removal of Shipping Restraints
Mechanical restraints are used to secure the spring mounted
fan during shipment. Restraints and shipping blocks must be
removed after unit has been set in its final location.
4 IM708
Refrigerant Piping
Pressure Relief Valves
All units have individual condensers per refrigerant circuit
and each condenser is provided with a spring loaded relief
valve. The valve is set to open when refrigerant pressure
reaches 400 psig. The relief valve will accommodate a 1/2"
flare connection for applications where it is necessary to
connect vent piping and run it outside the building.
CAUTION
When refrigerant is vented to the outside of the building,
the vent piping should be installed as recommended in
ASHRAE Standard 15-1994.
IM708 5
W ater Connections
General
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.
The piping should be installed with a minimum number of
bends and elevation changes for best performance. Piping
should contain:
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.
4. Some means of maintaining adequate system water
pressure (e.g., expansion tank or regulating valve).
5. Temperature and pressure indicators located at the unit
to aid in servicing.
6. A strainer or some means of removing foreign matter
from the water before it enters the pump. It should be
placed 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 help maintain system performance.
7. Size piping to minimize system pressure drop.
mizer will typically elevate the water temperature by 5
to 10°F before entering the condenser, allowing suitable
condenser water temperatures whenever the tower supply temperature is 50°F or higher. Mechanical cooling is
locked out below 55°F EWT.
6. Head pressure control must be provided if entering condenser water temperatures will go below 55°F. Fan
cycling and/or modulating discharge dampers on the
cooling tower are often used, or a 3-way bypass around
the tower to maintain condenser water temperature.
Cooling tower control to maintain the temperature at
>55°F is generally more cost effective if multiple units
are in the loop. If valves are installed on the individual
SWP units, a single water regulating valve controlled by
circuit #1 head pressure should be used. The Lead/Lag
option needs to equal “NO”. When Lead/Lag equals
“NO” circuit #1 is always first on and last off. The
refrigerant pressure line from the valve should be connected to a gauge port on any liquid line service valve
located in the compressor #1 refrigerant circuit. Compressor #1 is located at the far left of the cabinet.
If the water regulating valve is placed in service with the
unit condensers, it should be installed in the water line leaving the condenser and should shut down to prevent water
from siphoning out of the condensers. For systems where a
constant pumping head is required, the water regulating
valve may be installed in a bypass line around the condensers. It must then open on falling discharge pressu re.
Condenser Piping
1. Units may be specified with water and condensate connections on either the left or right side of the unit.
2. All units have an individual condenser per refrigerant
circuit. All condensers are factory piped for a common
condenser water supply and a common condenser water
return connection.
3. Field piping connections are made to factory provided
piping located as indicated on the unit submittal drawings. The piping connections are run to the outside of
the unit cabinet. Connections are located behind a factory mounted shipping cover. All connections are copper sweat connections as indicated on unit dimensional
drawings.
4. Supply and return water connections must be made at
the proper locations as indicated by the dimensional
drawings. Supply (water in) connection is always the
lower connection.
5. Units with factory mounted water side economizer
should not require head pressure control. The econo-
These typical systems, depending on the specific application, must maintain a constant condensing pressure regardless of temperature conditions and must assure adequate
head pressure for proper thermal expansion valve operation.
A minimum head pressure of 180 psi (95°F condensing temperature) is recommended.
7. Condenser tube velocities must not exceed 10 feet per
second.
Figure2. Condenser Regulating Valve (refrigerant
pressure controlled
)
6 IM708
Figure3. Condenser water pressure drop SWP018 -
SWP040
40
24 HP
28 HP
12 HP
18 HP
32 HP
36 HP
40 HP
Figure5. Economizer water pressure drop, SPW018-
SPW105
50
035-040
045-095
105
018-028
20
O)
2
10
8
Pressure Drop (ft H
6
4
3
20
60 80
40
Condenser Flow Rate (gpm)
100
200 300
Note: HP = total unit compressor horsepower.
Figure4. Condenser water pressure drop SWP045 -
SWP105
60
O)
Pressure Drop (ft H
40
20
2
10
8
6
40HP
46HP
52HP
56HP
60HP
70HP
80HP
78HP
84HP
90HP
105HP
120HP
O)
2
10
Pressure Drop (ft H
1
Note:
10
Condenser Flow Rate (gpm)
!
Includes coil, control valves and interconnecting
100 500
piping.
"
Add this∆P to condenser ∆P to obtain unit ∆P
for pump selection.
Figure6. Water regulating valve pressure drop.
Head pressure control
40
10
O)
2
018-040
4
2
80 100
200 300
Condenser Flow Rate (gpm)
Note: HP = total unit compressor horsepower.
IM708 7
400 500
Pressure Drop (ft H
0.1
045-095
1
10
100
500
Condenser Flow Rate (gpm)
Figure7. Hot water coil pressure drop, SWP018 -
SWP040
100
018
035
023-028
040
O)
2
10
Pressure Drop (ft H
1
10
100
Water Flow Rate (gpm)
Hot water coil pressure drop, SWP045 - SWP105
100
Condensate Drain Connection
The condensate drain connection is 1 1/8" O.D.S. copper and
is located on the same end of the unit as the condenser water
connections. The drain is internally trapped at the factory
requiring no external trap. The condensate line should be
pitched away from the unit with a minimum slope of 1/8" per
foot.
Drain pans and the drain trap should be kept clean by periodic cleaning. A cleanout is provided as standard in the trap
to aid in cleaning.
200
O)
2
10
Pressur e Drop (ft H
1
10 100
Water Flow Rate (gpm)
055
045
065-095
105
200
8 IM708
Duct Connections
Supply Air
For connection of supply ductwork directly to the unit, a
duct collar must first be mounted at the fan outlet, avoiding
the mounting screws located around the perimeter of the fan
discharge opening (see Figure 8). Fan discharge opening
sizes are indicated on the unit dimensional drawings. When
connecting ductwork to the unit, a canvas type connecting
collar is recommended.
Units are available in two fan configurations and should be
ducted as shown in Figure 9. Duct take-offs which go opposite to the direction of fan rotati on will result in an associated
system effect loss and reduced fan performance.
If a field fabricated plenum is used, duct take-off locations
should again be correctly oriented to the rotation of the fan to
minimize system losses. Refer to unit dimensional drawings
and Figure 8 for plenum mounting size requirements. Canvas type connectors are recommended at the duct connection
to the plenum.
Units are also available with a factory provided discharge
plenum. Supply duct connections to the plenum opening(s)
should include a canvas type connector. Plenum opening
sizes and locations will be indicated on the job submittal.
Figure8. Unit top detail
Figure9. Discharge duct configurations
Return Air
Return air to the unit can be arranged in two ways.
1. Ducted return
Return ductwork may be attached to the 2" flange around the
perimeter of the unit's return air opening (Refer to Figure
10). A canvas type duct connecting collar is recommended.
All ductwork connected to the unit should be of adequate
size and construction for the application. A canvas type connector is also recommended where the duct penetrates the
machine room wall(s). This will prevent vibration generated
by air movement in the duct from being transmitted out to
the occupied spaces.
Note: Do not obstruct unit access panel located below the
return opening.
2. Free return
The mechanical equipment room may be used as a return
plenum with no hard connection at the unit.
Note: Some building codes do not allow the use of the
mechanical room as a return plenum. Applicable
local codes should be checked for each installation.
Figure10.Back Elevation
(Optional)
Multi-Directional
Plenum
29”
K x L
Return Air Opening
D
B
Mechanical
Access
(See Notes)
(See Notes)
2.0” Typical
2.0”
M
1” Neoprene
Isolation Pads,
Shipped Separately
B25
IM708 9
Physical Data
Table 2: SWP 018 Through SWP 105
Data
Compressor
Quantity 2, 3, 4 3, 4 4 4 4 4 4 4 4 4 4, 6 6
Size See Unit Data Plate
Evaporator Coil
Face Area (Ft.2)
Rows 4, 6 4, 6 4, 6 4, 6 4, 6 4, 6 6 6 6 6 6 6
Fpi 12 12 12 12 12 12 12 12 12 12 12 12
Waterside Economizer Coil
Face Area (Ft.2)
Rows 4444 4 4 4 4 4 4 4 4
Fpi 12 12 12 12 12 12 12 12 12 12 12 12
Maximum Working Pressure
(psig)
Hot Water Heating Coil
Face Area (Ft.2)
Rows 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1 1 1
Fpi 12 12 12 12 12 12 12 12 12 12 12 12
Electric Heat
Kw 34 34 34 34 34 68 68 68 68 68 68 68
Filters
(Quantity) Size 4” Depth
Evaporator Fan
Quantity 1111 1 1 1 1 1 1 1 1
Size 15 18 18 20 20 22 25 25 25 27 27 33
Minimum Horsepower 5 7.5 10 10 15 15 20 20 20 25 30 40
Maximum Horsepower 10 15 20 20 25 30 40 40 40 50 60 60
Minimum Design cfm, CV 2950 3825 4425 5825 6925 7675 9025 10375 11575 12775 13975 15800
Minimum Design cfm, VAV 4720 6120 7080 9320 11080 12280 14440 16600 18520 20440 22360 25280
Maximum Design cfm 7080 9180 10620 13980 16620 18420 21660 24900 27780 30660 33540 37920
Condenser
Quantity 2, 3, 4 3, 4 4 4 4 4 4 4 4 4 4, 6 6
Waterside Working Pressure
(psig)
Minimum Entering
Temperature (F)
Minimum GPM 25 41 53 66 69 94 105 105 121 134 138 180
Maximum GPM 88 108 125 159 166 215 237 237 251 349 358 493
a
a. Standard fan TSP limit is 5.5 inch of water. Consult your local McQuay sales representative for applications beyond this range.
018 023 028 035 040 045 055 065 070 080 095 105
11.8 15.3 17.7 23.3 27.7 30.7 36.1 41.5 46.3 51.1 55.9 63.2
11.8 15.3 17.7 23.3 27.7 30.7 36.1 41.5 46.3 51.1 55.9 63.2
400 400 400 400 400 400 400 400 400 400 400 400
9.3 12.8 15.2 20.2 24.5 26.8 30.4 35.8 39.9 44.4 48.3 51.9
(6)20x20x4
(2)25x20x4
(6)20x20x4
(2)25x20x4
400 400 400 400 400 400 400 400 400 400 400 400
55° 55° 55° 55° 55° 55° 55° 55 55° 55° 55° 55°
(6)20x20x4
(2)25x20x4
(10)25x20x4 (10)25x20x4 (12)25x20x4 (12)25x20x4 (18) 20x20x4 (6)16x20x4
SWP Model Size
(12)25x20x4
(3)20x20x4
(15)25x20x4
(6)16x20x4
(15)25x20x4
(4)16x20x4
(17)20x25x4
(1)16x25x4
Table 3: Compressor circuit charge
COMPRESSOR
(HP)
69 lbs.66
10 14 lbs. 112
13 18 lbs. 128
15 22 lbs. 256
20 27 lbs. 256
*Charge quantities listed are average. Actual cha rg e qu an tity is dependent on
individual unit evaporator coil circu iting. Actual char ge quantities are st amped
on each unit nameplate.
10 IM708
*REFRIGERANT
CHARGE PER
CIRCUIT (R-22)
OIL CHARGE
PER CIRCUIT
(OZ.)
Dimensional Data
Figure 1 1. Left Side Front (CW) Disch arge with 0ptional
Multi-Directional Plenum
(Optional)
Multi-Directional
Plenum
(See Notes)
K x L Return Air
3.25”
19.0"
14.75”
8.75”
Filter Section
Outlet
Inlet
G
Heater
Evaporator
Economizer
A
J
Electrical Panel
A21
Figure 12. Left Side Back (CCW) Discharge with
0ptional Multi-Directional Plenum
9.63"
(18-95)
10.31
(Optional)
Multi-Directional
Plenum
(See Notes)
K x L Return Air
3.25”
19.0"
14.75”
Heater
Evaporator
Economizer
Filter Section
Outlet
Inlet
A
8.75”
(105)
Electrical Panel
A22
Note: Select unit arrangement on the unit selection.
Plenum can be shipped separately. Please indicate on the unit submittal. Indicate size and location of plenum openings on the unit submittal. All openings are on plenum centerline. For additional information refer to plenum certified drawing .
Table 4:
BASIC UNIT 018 023 028 035 040 045 055 065 070 080 095 105
A
B
D
FFan Disch. 18.62 21.88 21.88 24.75 24.75 27.25 31.25 31.25 31.25 34.25 34.25 47.25
G Fan Disch. ^ Opening 15.88 18.88 18.88 24.75 24.75 27.25 31.25 31.25 31.25 34.25 34.25 34.94
H Fan Disch. Location 32.69 31.06 31.06 37.62 37.62 46.38 44.38 44.38 50.38 54.88 60.88 54.40
J Fan Disch. Location 22.50 18.81 18.81 20.12 20.12 21.06 21.32 21.32 21.32 23.82 23.82 33.46
K Return Opening Height 41.44 41.44 41.44 51.44 51.44 51.44 51.44 62.20 62.20 62.20 62.20 70.20
L Return Opening Length 80.00 80.00 80.00 96.00 96.00 116.00 116.00 116.00 128.00 140.00 152.00 152.00
M Base of Return Opening 28.62 28.62 28.62 28.62 28.62 28.62 28.62 23.87 23.87 23.87 23.87 23.87
N Water Out/In (ODS) 2-1/8 2-1/8 2-1/8 2-5/8 2-5/8 2-5/8 3-1/8 3-1/8 3-1/8 3-1/8 3-1/8 3-1/8
P 1 Row HW Donn (ODS) 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8 2-1/8
P 2 Row HW Conn (ODS) 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8 2-1/8 - - -
b
Deptha
b
Lengtha
b
Heighta
a. Dimensions do not include handle, latch or fastener extensions.
b. For shipping dimensions add 4" (102mm) to depth, 8" (204mm) to length, and 4" (102mm) to height.
72.00 72.00 72.00 72.00 72.00 81.00 81.00 81.00 81.00 84.00 84.00 96.00
84.00 84.00 84.00 100.00 100.00 120.00 120.00 120.00 132.00 144.00 156.00 156.00
82.00 82.00 82.00 82.00 82.00 82.00 82.00 88.00 88.00 88.00 88.00 96.00
IM708 11
Figure 13. Unit Front Plan
Return Air
Left Side
Piping Connections
(See Notes)
Figure 14. Front Elevation
ASD (Optio nal)
MicroT ech II Panel
D
Supply
Fan Motor
Disconnect
Switch (Optional)
Power Entry
7/8" Pilot K.O.
Electrical
Access
(Optional)
Right Side
Piping Connections
(See Notes)
A23
72"
Figure 16. Left Side
K x L Return Air
1-1/8” ODS Drain
(N) W a te r O ut
(N) W ater In
Lifting Lug
1” Typ.
A/2
A
Figure 17. Discharge Plenum (Optional)
Plan View
Depth
Multi-Directional
(Optional)
Plenum
(See Notes, Page 11)
(P) Ho t W a te r O u t
(P) Ho t W a te r In
44.5”
38.5”
Mechanical
Access
B
Note: Service connections determined when facing the front of the
unit. Left-hand standard, right-hand optional. Please indicate on
the unit submittal.
Note: Unit sizes 018, 023 and 028 have a single mechanical access
panel in bottom front and bottom back.
Figure 15. Back Elevation
H H
29”
D
Mechanical
(See Notes)
F
K x L
Return Air O pening
B
Access
Multi-Directional
Plenum
(See Notes, Page 11)
2.0” Typical
2.0”
M
1” Neoprene
Isolation Pads,
Shipped Separately
(Optional)
Length
29”
Front/Back Elevation
H
A
3”
2” Min
29”
Left/Right Elevation
H
B
Table 5. Discharge Plenum
Unit Size Length (in.) Depth (in.) Height (in.)
018D-028D 84 72 29
035D-040D 100 72 29
045D-065D 120 81 29
070D 132 81 29
080D 144 84 29
095D-105D 156 84 29
3”
A27
2” Min
12 IM708
Unit Weights
Table 6. Unit and Component Weight in lbs.
Unit Weights
Basic Configuration
SWP basic unit
Filters
4" 30% or 65% efficiency 38 38 38 55 55 66 66 79 87 96 104 112
Evaporator Coil
6 Row, 12 fpi 250 294 321 417 468 506 577 642 693 755 819 926
4 Row, 12 fpi 206238257333368395------
Water Economizer Coil
4 Row, 12 fpi 306 338 357 458 493 520 598 648 678 723 820 927
Water weight 51 66 75 94 111 119 150 168 187 203 218 281
Hot Water Coil
1 Row, 12 fpi 71 97 114 130 158 160 170 200 328 337 345 371
Water weight 16 20 23 28 32 37 41 49 55 59 62 62
Electric Heat
34 KW 2020202020------68 KW -----40404040404040
Supply Fan Motors
3 HP ODP 71------ ---5 HP ODP 82------ ----
7.5 HP ODP 124124----- -- -10 HP ODP 144 144 144 144 - - - - - - 15 HP ODP - 185 185 185 185 185 - - - - 20 HP ODP - - 214 214 214 214 214 214 214 - - 25 HP ODP - - - - 266 266 266 266 266 266 - 30 HP ODP - - - - - 310 310 310 310 310 310 40 HP ODP ------404404404404404404
50 HP ODP ------- -452452452
60 HP ODP ------- --620620
75 HP ODP ------- ---836
3 HP TEFC 72------ ---5 HP TEFC 85------ ----
7.5 HP TEFC 140140----- ---10 HP TEFC 170 170 170 170 - - - - - - 15 HP TEFC - 235 235 235 235 235 - - - - 20 HP TEFC - - 300 300 300 300 300 300 300 - - 25 HP TEFC - - - - 330 330 330 330 330 330 - 30 HP TEFC - - - - - 390 390 390 390 390 390 40 HP TEFC ------510510510510510510
50 HP TEFC ------- -570570570
60 HP TEFC ------- --850850
75 HP TEFC ------- ---900
Compressor/Condens e r As sembly
(2)6HP 26 368------ ---(3)6HP 35 538538----- ---(4)6HP 43 699 699 699 699 - - - - - - (3)6HP, (1)10HP 57 - 843 843 843 843 - - - - - (2)6HP, (2)10HP 66 - - 974 974 974 - - - - - (1)6HP, (3)10HP 74 - - - 1115 1115 - - - - - (4)10HP 95 - - - 1263 1263 1263 1263 1263 - - - (2)10HP, (2)13HP 106 - - - - - 1404 1404 1404 - - - (4)13HP 118 - - - - - 1549 1549 1549 1549 - - (2)13HP, (2)15HP 129 - - - - - 1709 1709 1709 1709 1709 1709 (4)15HP 141 - - - - - 1867 1867 1867 1867 1867 1867 (2)15HP, (2)20HP 152 -------198219821982 1982 (4)20HP 190 ------- -2096 2096 (6)13HP 167 ------- --22652265
(3)13HP, (3)15HP 178 ------- --24792479
(6)15HP 188 ------- --26932693
(3)15HP, (3)20HP 209 ------- --29142914
(6)20HP 229 ------- --31353135
Discharge Plenum
Factory Installed, 29” 636 636 636 711 711 862 862 862 922 1003 1064 1064
a. Base Weight includes supply fan without motor.
b. Water economizer weight includes valves and piping.
c. The values in this table do not include water weight.
d. Hot water coil weight includes valve and piping.
a
b c
d
c
Water Weight
018 023 028 035 040 045 055 065 070 080 095 105
2226 2313 2318 2638 2643 3110 3279 3406 3734 4021 4246 4673
Unit Size
IM708 13
Field Wiring
General
Wiring 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 recommended for all power lead terminations.
Contact factory for information concerning aluminum wire
power lead terminations.
A single power terminal block is provided as standard and
wiring within the unit is done in accordance with the
National Electric Code. All branch circuits within the control
panel are individually fused. A single field supplied disconnect is required or a unit mounted nonfused disconnect can
be ordered with the unit.
A 7/8” knockout is located on the right-hand unit upright for
locating unit power entry. 24V field connections are suitable
for Class II wiring.
Unit Disconnect
Disconnecting means are addressed by Article 440 of the
National Electric Code (NEC) which requires 'disconnecting
means capable of disconnecting air conditioning and refrigerant equipment including motor-compressors, and controllers, from the circuit feeder." The disconnect switch should
be selected and located within the NEC guidelines. Location
requirements per NEC are that the disconnect be located in a
readily accessible position within sight (50 feet) of the unit.
A factory mounted nonfused disconnect is available.
Table 7. Compressor Motors
Compressor
HP
6
10
13
15
20
208/60/3 230/60/3 400/50/3 460/60/3 575/60/3
RLA LRA RLA LRA RLA LRA RLA LRA RLA LRA
17.9 156.0 16.2 156.0 8.1 70.0 8.1 70.0 6.5 54.0
31.2 239.0 28.2 239.0 14.1 125.0 14.1 125.0 11.3 80.0
35.6 350.0 32.0 350.0 16.0 158.0 16.0 158.0 12.8 125.0
42.1 425.0 38.0 425.0 19.0 187.0 19.0 187.0 15.2 148.0
74.0 360.0 67.2 360.0 33.6 180.0 33.6 180.0 36.9 144.0
Return Air and Outside Air Sensors
All units are provided with a return air sensor. The outside
air sensor is optional and can be ordered with the unit. The
return air sensor is connected to the input control board and
is coiled up and placed in the control box of the unit for shipment. The return air sensor must be field installed in the
return air stream for proper unit operation. The outside air
sensor is shipped loose in a package and is located on the
floor of the fan section. The mixed air temperature sensor is
already installed at the inlet of the unit.
The sensors must be mounted in areas that are exposed to
representative temperature conditions. The sensor should be
mounted at a position that has good air mixing and does not
have stratification. The sensor can be mounted in the ductwork using a grommet, see Figure 18.
Figure 18. Return/Outside Air Sensor Mounting
Sensor
Ductwork
The return air sensor is connected to the unit’s input board at
location AI4, see IM710. The outside air sensor is field
wired to terminal strip TB2. The sensor is to be connected at
terminals 124 and 125.
Grommet
Table 8. Electric Heaters
SWP UNIT SIZE
018 - 040
045 - 105
14 IM708
208V/60HZ/3PH 230V/60HZ/3PH 400V/50HZ/3PH 460V/60HZ/3PH 575V/60HZ/3PH
kW MBH FLA kW MBH FLA kW MBH FLA kW MBH FLA kW MBH FLA
27.8 94 77.2 34 116 85.6 25.7 88 37.2 34 116 42.8 34 116 34.2
55.6 190 154.4 68 232 170.9 51.4 175 74.4 68 232 85.6 68 232 68.4
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