Sight glasses with
ports for viewing
while unit is running
Unit mounted microprocessor
control with easy-to-read human
interface panel
Swing out VFO panel with
Tri-VFO for efficie nt VAV
operation
Trane 3-D® Scroll Compressor for reliability, efficiency and
quiet operation
Two-bolt connection on
cleanable condenser for
quick, easy maintenance
Waterside valve
package option
to enhance system
efficiency
Internally trapped
drain for low cost
installation
2-inch flat filter
box inside unit
casing
Affordable Self-Contained Value from Trane…
IntelliPak™ Signature Series Self-Contained Units
Copyright
This document and the information in it are the property of Trane, and may not be used or
reproduced in whole or in part without written permission. Trane reserves the right to revise this
publication at any time, and to make changes to its contents without obligation to notify any person
of such revision or change.
Trademarks
Trane and the Trane logo are trademarks of Trane in the United States and other countries. All
trademarks referenced in this document are the trademarks of their respective owners.
Revision History
PKG-PRC002-EN (26 Jun 2014). Updated evaporator fan and low flow fan information in
General Data tables. Reordered General Data tables
PKG-PRC002-EN (04 Apr 2013). Add wireless comm interface (WCI).
PKG-PRC002-EN (18 Oct 2012). Corrected Table 60 values. Updated fan FLA and LRA values
•Multiple compressor design reduces acoustical levels. Scroll compressor design smooths gas
flow for quieter operation
Indoor Air Quality (IAQ) Features
•Sloped drain pan
•Stainless steel sloped drain pan option
•Internally trapped drain connection
•Double wall construction option
•Matt-faced fiberglass insulation
•High efficiency throwaway filter option
4 PKG-PRC002U-EN
Features and Benefits
•Easily cleanable evaporator, condensers, and waterside economizers
•Filter access door allows easy removal to encourage frequent filter changing
•Airside economizer with Traq™ damper allows direct measurement and control of outdoor air
Enhanced Serviceability
•Self-supporting removable panels
•Quick access service panel fasteners
•Eye level control/service center
•Refrigerant line sight glasses in view during operation
Competitive Advantage
•Increased capacity to meet today’s growing floor plates and building loads
•Compact cabinet to minimize mechanical room requirements
•Up to 17% more efficient than competitive units
•Low leaving air temp capability to reduce fan motor energy, improve acoustical performance,
and minimize duct sizes
•Factory-installed and tested IntelliPak™ microprocessor controller
Standard Features
•20 through 110 ton industrial/commercial water-cooled self-contained units
•20 through 60 ton industrial/commercial remote air-cooled self-contained units
•Fully integrated, factory-installed, and commissioned microelectronic controls
•Unit mounted human interface panel with a two line x 40 character clear language (English,
Spanish, or French) display and a 16-function keypad that includes custom, diagnostics, and
service test mode menu keys
•Improved Trane 3-D™scroll compressor
•Compressor lead/lag
•CV or VAV system control
•Low ambient compressor lockout adjustable control input
•EISA efficiency open drip proof (ODP) and totally enclosed fan (TEFC) cooled supply fan motor
options
•FROSTAT™ coil frost protection on all units
•Daytime warm-up (occupied mode) on units with heat and morning warm-up operation on all
units
•Supply air static over pressurization protection on units with variable frequency drives (VFDs)
•Supply airflow proving
•Supply air tempering control with heating option
•Supply air heating control on VAV with hydronic heating option
•Emergency stop input
•Mappable sensors and setpoint sources
•Occupied/unoccupied switching
•Timed override activation
•Refrigeration circuits are completely factory piped and tested on water-cooled units
•Factory piped and tested, mechanically cleanable water-cooled condensers
PKG-PRC002U-EN5
Features and Benefits
•Two-bolt removable condenser waterboxes for quick and easy cleaning
•Sloped drain pans to ensure complete condensate removal for IAQ
•Internally trapped drain connection with cleanout
•Internally isolated centrifugal supply fan
•Sturdy-gauge galvanized steel framework with easily removable painted galvanized steel
•UL listing on standard options
•Fan belts and grease lines are easily accessible
•Access panels and clearance provided to clean both evaporator and waterside economizer coil
•Condensing pressure control on all variable water flow systems with valves
•Programmable water purge during unoccupied mode
•High entering air temperature limit
•Low entering air temperature limit with waterside economizer or hydronic heat
•Shipped with protective shrink wrap covering of unit and any indoor modules shipped loose
Optional Features
•Trane communication interface module: ICS interface control module
•BACnet Communication Interface Module
•Generic BAS interface
•Comparative enthalpy control
•Ventilation override from up to five external inputs
•Remote human interface controls up to four units
•Fully integrated, factory-installed/commissioned variable frequency drive control with or
•Waterside economizer with factory installed piping and controls
•Waterside modulating condensing temperature control valves include factory installed piping
•Removable cast iron headers on cleanable waterside economizer
•Flexible horizontal discharge plenum with or without factory cut holes
•Heating options include hot water, steam, and electric
•Refrigerant suction discharge line service (shut-off) valves
•Protective coatings for the unit and/or evaporator coils
•Double wall construction
•Stainless steel sloped drain pan
•Medium efficiency throwaway filters
•Through-the-door non-fused disconnect switch
•Trane’s air quality Traq™ damper in airside economizer mixing box
•High duct temperature thermostat
•Dual electrical power connection
•CO2 reset input
•2 and 4-inch filter racks for all sizes
•Hi-capacity coils available on many models
exterior panels
fins
without optional integrated bypass
and control wiring
6 PKG-PRC002U-EN
Variable Frequency Drives (VFD)
Var ia bl e f re quency drives are factory installed, wired, and tested to provide supply fan motor speed
modulation. VFDs are quieter and more efficient than inlet guide vanes and may even be eligible
for utility rebates. The VFDs are available with and without a manual integrated bypass option,
controlled through the human interface (HI) panel. Bypass control provides full nominal airflow
control to CV zone setpoints in the unlikely event of a drive failure by manually placing the drive
in the bypass mode.
Field Installed Accessories
•Airside economizer control with or without mixing box
•Wireless comm interface (WCI)
•Programmable sensors with or without night set back for CV and VAV systems
•ICS zone sensors used with Tracer™ system for zone control
•Field installed module kits available for field upgrade of controls
•Ultra low leak dampers for 0-100 percent modulating fresh air economizer
Integrated Self-Contained Systems
Integrated Comfort™ System (ICS)
Trane’s Integrated Comfort system (ICS) increases job control by
combining IntelliPak™ Signature Series self-contained units and
a Tracer™ building management system. This integrated system
provides total building comfort and control. Building owners
and managers not only save energy when using ICS. They have
the ability to automate their facilities and the convenience of a
control system interface.
Features and Benefits
Simplifying The Comfort System
Trane’s designers combined new technology and innovation to
bring you more system capabilities and flexibility. Our
Integrated Comfort System (ICS) with HVAC equipment is easy
to use, install, commission, and service.
Everything you need to know about your self-contained VAV system is available using Tracer,
Trane’s family of building automation products. Tracer is a software package that minimizes custom
programming requirements and allows easy system setup and control using your personal
computer. By enabling all CSC units to communicate using the LonTalk interface, transforming
your heating and cooling units into a true system is made simple.
Operating data from all system components is readily available for evaluation. You can control,
monitor, and service your facility—all from your personal computer. That is why all Tracer controls
have been designed to be LonTalk compatible.
The IntelliPak self-contained unit, as part of Trane ICS, provides powerful maintenance monitoring,
control, and reporting capabilities. Tracer places the self-contained unit in the appropriate
operating mode for: system on/off, night setback, demand limiting, setpoint adjustment based on
outside parameters and much more. You can monitor unit diagnostic conditions through Tracer
such as: sensor failures, loss of supply airflow, and an inoperative refrigerant circuit.
PKG-PRC002U-EN7
Features and Benefits
Tracer points monitored for IntelliPak Signature Series Self-Contained include:
•Compressor on/off status
•Ventilation status
•Condenser water flow status
•Heat status
•Supply air pressure
•Supply air temperature
•Suction temperature of each circuit
•Entering economizer water temperature
•Zone temperature
•Entering condenser water temperature
•Supply air temperature reset signal
•Morning warm-up sensor temperature
•Entering air temperature
Tracer control points available for IntelliPak Signature Series self-contained include:
•Cooling and heating setpoints
•VAV discharge air temperature setpoints
•Supply air pressure setpoint
•Cooling and heating enable/disable
•Air economizer enable/disable
•Airside economizer minimum position
•Unit priority shutdown
Commissioning, control, efficiency, and information…it simply all adds up to one reliable
source…Trane.
Interoperability with BACnet™
The Trane Tracer SC BACnet Control Interface (BCI) for IntelliPak self-contained offers a building
automation control system with outstanding interoperability benefits. BACnet, which is an industry
standard, is an open, secure and reliable network communication protocol for controls, created by
American Society of Heating, refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE).
Interoperability allows application or project engineers to specify the best products of a given type,
rather than one individual supplier's entire system. It reduces product training and installation
costs by standardizing communications across products. Interoperable systems allow building
managers to monitor and control IntelliPak equipment with Tracer SC controls or a 3rd party
building automation system. It enables integration with many different building controls such as
access/intrusion monitoring, lighting, fire and smoke devices, energy management, and a wide
variety of sensors (temperature, pressure, humidity, occupancy, CO
and air velocity).
2
Trane Wireless Comm Interface (WCI)
The Trane® Wireless Comm Interface (WCI) is the perfect alternative to Trane’s BACnet™ wired
communication links (for example, Comm links between a Tracer™ SC and a Tracer™ UC400).
Minimizing communication wire used between terminal products, zone sensors, and system
controllers has substantial benefits. Installation time and associated risks are reduced. Projects are
completed with fewer disruptions. Future re-configurations, expansions, and upgrades are easier
and more cost effective.
8 PKG-PRC002U-EN
Trane R-410A 3-D™ Scroll Compressor
The R-410A Trane 3-D™ Scroll provides
important reliability and efficiency benefits
inherent in its design. The 3-D™ Scroll allows
the orbiting scrolls to touch in all three
dimensions, forming a completely enclosed
compression chamber which leads to increased
efficiency. In addition, the orbiting scrolls only
touch with enough force to create a seal,
eliminating wear between the scroll involutes.
The fixed and orbiting scrolls are made of high
strength cast iron which results in less thermal
distortion and minimal leakage. In addition,
improved part isolation provides reduced
compressor sound levels compared to previous
designs.
Features listed below optimize the compressor design and performance:
•Optimized scroll profile
•Heat shield protection to reduce heat transfer between discharge and suction gas
•Improved sealing between high side and low side
Additional features are incorporated in the compressor design for greater reliability:
•Patented design motor cap for improved motor cooling
•Improved bearing alignment
•Improved resistance to dry start-up
•Oil sight glass for evaluating proper oil levels
Features and Benefits
Low Torque Variation
The 3-D™ Scroll has a very smooth compression cycle, imposing very little stress on the motor and
resulting in greater reliability. Low torque variation reduces noise and vibration.
Suction Gas Cooled Motor
Compressor motor efficiency and reliability is further optimized with the latest scroll design. The
patented motor cap directs suction gas over the motor, resulting in cooler motor temperatures for
longer life and better efficiency.
Proven Design through Testing and Research
The new R-410A 3-D™ Scroll compressor is the next generation of reliable Trane 3-D™ Scroll
compressors provided by Trane, the leader in scroll compressor technology.
Figure 1. One of two matched scroll plates - the distinguishing feature of the scroll compressor
PKG-PRC002U-EN9
Application Considerations
Elevator
Elevator
Supply
Air
Supply Air
Mechanical
Room
Self
Contained
Unit
Bathroom
Stairwell
Return Air
Self-Contained Acoustical Recommendations
Successful acoustical results are dependent on many system design factors.
Following are general acoustical recommendations. For more information, or if there is concern
about a particular installation, contact a professional acoustical consultant.
Location and Orientation of the Mechanical Equipment Room
Locate the equipment room adjacent to stairwells, utility rooms, electrical closets, and rest rooms
if possible (See figure below). This minimizes the acoustic effects and risk of workmanship or
installation errors. Place the discharge and return air ductwork over these less acoustically
sensitive areas, using vertical or horizontal fresh air shafts. Consult code requirements for fresh air
and smoke purge constraints.
Return Air Ductwork
Duct the return air into the mechanical equipment room. Connect ductwork to the unit if local code
dictates. The return air ductwork must have an elbow inside the equipment room. This elbow will
reduce sound transmissions through the return duct. Extend the ductwork from the elbow far
enough to block the “line of sight” to the exterior of the equipment room. Use a minimum ductwork
length of 15 feet to the equipment room exterior. Line the duct with two-inch, three-pound density
insulation. Use multiple, small return ducts for better acoustical performance to the occupied
space.
Supply Air Ductwork
Insulate the supply air duct with two-inch, three-pound density insulation. Extend this lining at least
15 feet out from the equipment room wall, keeping the duct aspect ratio as small as possible.
Minimize large flat panels since they transmit sound. In addition, small aspect ratios will minimize
potential “oil canning” of the duct due to flow turbulence.
The flexible horizontal discharge plenum option helps avoid complicated ductwork transitions.
Ductwork turning vanes typically improve pressure drop but degrade acoustical performance.
Recommended Maximum Air Velocities
The maximum recommended velocity for the discharge air duct is 2,000 fpm. The maximum
recommended velocity for the return air duct is 1,000 fpm. Limit air velocities below these
operating points to minimize the risk of flow turbulence that causes regenerated noise. Using
round supply duct and static regain allows maximum discharge air velocities up to 3,000 fpm.
Lining round supply duct also substantially lowers frequency noise attenuation. However, flow
regenerated noise potential increases dramatically at air velocities over 3000 fpm.
Figure 2. Equipment room location and orientation
10 PKG-PRC002U-EN
Application Considerations
Equipment Room Construction Options
The preferred equipment room wall construction is
concrete block. If this is not feasible then a double
stud offset wall is suggested (See figure). This
removes physical contact that would transmit sound
through the equipment room wall to the occupied
space. Interweave fiberglass insulation between the
wall studs. Use two layers of sheetrock on each side
of the wall.
Workmanship details are critical to acoustical
performance. Seal all wall and floor penetrations by
the ductwork, water piping, and equipment room
access doors with a flexible material such as caulk
and/or gasketing to stop noise and air leaks.
Locate the equipment room door away from acoustically sensitive areas like conference rooms.
The door should swing out of the equipment room, if possible, so that the low pressure in the
equipment room pulls the door in to help maintain a tight seal.
Equipment Options
The flexible horizontal discharge plenum allows multiple tested outlet options. This minimizes the
risk of acoustic and/or pressure drop problems by avoiding complex transitions close to the fan
discharge.
Static Pressure Versus Acoustics
Design the system to minimize the total static pressure required from the self-contained unit fan.
Typically a change in static pressure of only 0.5 inches can reduce NC level by approximately 2 or
3 in the occupied space.
Isolation Recommendations
Unit
The Signature Series unit fan and compressors are internally isolated. Therefore, external isolation
is not required. Consult a vibration specialist before considering external or double vibration
isolation.
Ductwork
Design duct connections to the unit using a flexible material. Consult local codes for approved
flexible duct material to prevent fire hazard potential.
Piping Connections
Rubber isolator connectors are recommended for condenser piping to prevent vibration
transmission to or from the building plumbing. The Signature Series self-contained unit is
internally isolated and does not require additional isolation. However, ensure proper system
vibration isolation design prevents vibration transmission from the building plumbing to the unit.
Also be sure to properly isolate the drain line.
Condenser Water Piping
Piping Location and Arrangement
Provide at least 24 inches of clearance between the piping and the unit for service. Place the risers
away from the side of the unit if possible. Be sure to allow sufficient space for valves and unions
between the piping and the self-contained unit. Lay out condenser piping in reverse returns to help
balance the system. This is accomplished by equalizing the supply and return pipe length. Multi-
PKG-PRC002U-EN11
Application Considerations
story buildings may use a direct return system with balancing valves at each floor. Install all heat
exchangers and most cooling tower piping below the sump operating water level to prevent
overflow during unit and/or system shut down.
Recommended Pump Location
Locate pump downstream of the cooling tower and upstream of the self-contained unit. This
provides smoother and more stable unit operation.
When the tower and pump are both roof mounted, be sure to provide the necessary net positive
suction head pressure to prevent cavitation. Raise the tower or submerge the pump in a sump to
provide positive suction. To prevent an on-line pump failure, use a standby pump to avoid a
complete system shutdown.
Several partial capacity pumps or variable speed pumps may be used. Review the economics of
these alternate pumping options.
Strainers and Water Treatment
Water strainers are required at the unit inlet to eliminate potential unit damage from dirty water.
Specify a water basket-type strainer to avoid an incorrect stream strainer application. Untreated or
poorly treated water may result in equipment damage. Consult a water treatment specialist for
treatment recommendations.
Isolation Valves
Install isolation valves at each unit before the strainer and after the condenser. This allows periodic
servicing of the unit or strainer while allowing other units in the system to remain in operation.
Pressure Gauges
Install pressure gauges on the inlet and outlet of the self-contained unit. Select the gauge’s scale
so that the unit design operating point is approximately mid-scale.
Thermometers
Install thermometers on the condenser water inlet and outlet lines to each unit for system analysis.
Trane Company recommends using a thermometer temperature range of 40 to 140°F, using a 2°F
temperature increment.
Drains
The unit condensate drain is internally trapped to offset the pressure differential that exists during
fan operation. Install a trapped drain in the low point of the mechanical equipment room floor to
collect water from cleaning operations.
Condensing Pressure Control (Water-Cooled condensers)
Often cold condensing water applications between 35°F and 54°F require a condensing pressure
control valve. Any unit with variable-flow waterside valves can modulate water flow to maintain
a user defined condensing temperature. However, to utilize this feature, the building water system
must be capable of operating at reduced water flow rates through the self-contained units. It is
imperative to install variable volume pumps or an external bypass in the water distribution system.
12 PKG-PRC002U-EN
Waterside Economizer Flow
Control
Units equipped with waterside
economizer control valves can be set
up for variable or constant water flow.
Use constant water flow setup on
water systems that are not capable of
unloading water supply to the unit.
The economizer and condenser
valves will operate in complement to
one another to provide continuous
water flow.
Use variable water flow setup with
water flow systems that can take
advantage of pump unloading for
energy savings. Since non-cooling
operation restricts water flow during
part load economizing or condensing
temperature control, it is imperative
to install variable volume pumps or an
external bypass in the water
distribution system.
Application Considerations
Free Cooling Opportunities and Alternatives
Free cooling is available with either the airside or waterside economizer options.
Waterside Economizer
The waterside economizer substantially reduces the compressor energy requirements because it
uses the cooling water before it enters the condensers. Additional equipment room space is not
required since the coils are contained within the overall unit dimensions.
Disadvantages include higher airside pressure drop and a higher head on condenser water pumps.
The coils may be mechanically cleanable (optional) for ease in maintenance versus expensive and
difficult chemical cleaning methods.
Airside Economizer
The airside economizer substantially reduces compressor, cooling tower, and condenser water
pump energy requirements using outside air for free cooling. It also reduces tower make up water
needs and related water treatment.
Disadvantages include building requirements that locate the mechanical room and self-contained
unit toward an exterior wall to minimize ductwork, building barometric control, or additional air
shafts. Also, airside economizers require additional mechanical room space.
Unit Operating Limits
Airflow
The minimum recommended airflow for proper VAV system staging and temperature control is 35
percent of nominal design airflow. Adjusting VAV boxes with the appropriate minimum settings
will prevent the self-contained unit from operating in a surge condition at airflows below this point.
Continuous operation in a surge condition can cause fan failure. Reference General Data Tables on
Table 1, p. 20 for minimum airflow conditions.
PKG-PRC002U-EN13
Application Considerations
Signature Series self-contained units use fixed pitch sheaves. Adjust air balancing by obtaining
alternate fixed pitch sheave selections from the local Trane sales office.
Water Flow
Use 3 gpm/ton for optimum unit capacity and efficiency. Use 2.5 or 2 gpm/ton to reduce pump
energy, cooling tower and piping costs. However, these reduced water flows may impact unit
capacity and efficiency by one or two percent. Consult General Data Tables on pages 17-20 for unit
specific water flow ranges.
Remote Air-Cooled Condenser
Unit Location
Unobstructed condenser airflow is essential to maintaining capacity and operating efficiency.
When determining unit placement, give careful consideration to assure sufficient airflow across the
condenser coils. Avoid these two detrimental conditions: warm air recirculation and coil starvation.
Both warm air recirculation and coil starvation cause reductions in unit efficiency and capacity
because of the higher head pressure associated with them. In more severe cases, nuisance unit
shutdowns will result from excessive head pressures.
Clearance
Ensure vertical condenser air discharge is unobstructed. While it is difficult to predict the degree
of warm air recirculation, a unit installed with a ceiling or other obstruction above it will experience
a capacity reduction that will reduce the maximum ambient operation limit. Nuisance high head
pressure trips may also occur.
The coil inlet must also be unobstructed. A unit installed closer than the minimum recommended
distance to a wall or other vertical riser will experience a combination of coil starvation and warm
air recirculation. This may result in unit capacity and efficiency reductions, as well as possible
excessive head pressures. Reference the service clearance section on page 111 for recommended
lateral distances.
Ambient Limitations
Standard ambient control allows operation down to 45°F with cycling of condenser fans. Units with
the low ambient option are capable of starting and operating in ambient temperatures down to 0°F.
Optional low ambient units use a condenser fan damper arrangement that controls condenser
capacity by modulating damper airflow in response to saturated condenser temperature.
Maximum ambient operating temperature of a standard condenser is 115°F. Operation at design
ambient above 115°F can result in excessive head pressures. For applications above 115°F, contact
the local Trane sales office.
14 PKG-PRC002U-EN
Selection Procedure
Following is a sample selection for a standard applied water-cooled self-contained at particular
operating conditions. Use Trane Official Product Selection System, TOPSS™, for making all final
selections or contact your local Trane representative.
Unit Capacities
1. Determine entering air temperature dry bulb and wet bulb and entering water temperature.
2. See chapter “Performance Data,” p. 27 to find gross total and sensible capacity that best meets
capacity requirements.
3. Apply the cfm correction factors from the capacity correction factor Ta bl e 13, p. 37 to determine
gross total and gross sensible capacities at desired cfm.
4. Multiply condenser water delta T by the total capacity cfm correction factor to determine new
condenser water delta T.
5. Using design cfm, determine static air pressure drops for accessories from the air pressure
drop Charts
external supply and return static air pressure drops. Use the total air pressure drop to determine
rpm and brake horsepower requirements from the appropriate fan curve. Note: The fan curves
include refrigerant coil and internal cabinet static loses.
6. Calculate supply fan motor heat by using the following equation:
Fan motor heat (MBh) = 2.8 x fan motor brake horsepower
7. Determine net total capacity and net sensible capacity by subtracting fan motor heat from gross
total capacity and gross sensible capacity.
8. Refer to Trane psychometric chart to determine leaving air temperatures.
Figure 1, p. 27 through Figure 21, p. 33. Add accessory static pressure drops to
Waterside Economizer Capacity
After determining that the unit will meet the required mechanical cooling capacity, determine the
waterside economizer capacity by referring to the appropriate two-row (low capacity) or four-row
(high capacity) waterside economizer capacity found in one of Table 15, p. 38through Ta b le 48 ,
p. 72.
9. Determine entering air temperature dry bulb and wet bulb, condenser water flow (gpm), and
economizer entering water temperature.
10. Refer to the appropriate waterside economizer table to find gross total and sensible capacity
and the leaving water temperature.
11. Apply the cfm correction factor for the waterside economizer from the appropriate table to
determine the gross total and sensible capacities at the desired cfm.
12. Multiply the condenser water delta T by the total capacity cfm correction factor to determine
the new delta T.
13. Calculate supply fan motor heat by using the following equation:
Fan motor heat (MBh) = 2.8 x fan motor brake horsepower
14. Determine net total and sensible capacity by subtracting fan motor heat from gross total and
sensible capacity.
15. Refer to the Trane psychometric chart to determine leaving air temperatures.
Selection Example
Design Conditions
Total gross capacity required = 420 MBh = 35.2 Tons
Total sensible capacity required = 315 MBh
Entering air temperature = 80/67°F
PKG-PRC002U-EN15
Selection Procedure
Unit includes:
Unit Selection
Tentatively select a 35 ton unit: Model SCWF 35.
Refer to Table 26, p. 49 to obtain gross total and sensible unit capacities, and gpm at the design
conditions:
Since the design cfm is greater than the nominal cfm, adjust the capacities and condenser water
delta T to reflect the higher cfm: design cfm 14840 = +6% of nom. Cfm nominal 14000 cfm
Refer to Tab l e 1 3 , p. 37 to obtain the capacity correction factors for +6% of nominal cfm:
Multiply the capacities by the correction factors:
The SCWF 35 meets the total and sensible design requirements.
Multiply the delta T of 10.1°F by the cooling capacity correction factor of 1.009 to obtain new delta
T of 10.19°F and add this to the entering water temperature to obtain the actual leaving water
temperature of 95.19°F.
Entering water temperature = 85°F
Water flow rate = 105 gpm
Airflow = 14840 cfm at 2.5-inch duct static pressure
2 = VFD and supply air temp ctrl
3 = VFD w/ bypass and supply
air temp ctrl
4 = Constant volume, zone temp cool
only
5 = Constant volume, w/ zone temp
heat/cool
6 = Constant volume and supply air
temp ctrl
Digit 10, 11 - Design Sequence
** = Factory Assigned
Digit 12 - Unit Construction
A = Vertical Discharge
B = Vertical Discharge With Double Wall
Digit 13 - Flexible Horizontal
Discharge Plenum Type
B = STD plenum w/ factory-cut holes
C = Low plenum w/ factory-cut holes
E = Std plenum w/ field-cut holes
F = Low plenum w/ field-cut holes
H = STD plenum double wall w/ field-cut
holes
J = Low plenum double wall w/ field-cut
holes
K = Extended height plenum w/factory-cut
holes, ship separate
L = STD plenum w/factory-cut holes, ship
separate
M =Low plenum w/factory-cut holes, ship
separate
N = Extended height plenum w/field-cut
holes, ship separate
P = STD plenum w/field-cut holes, ship
separate
R = Low plenum w/field-cut holes, ship
separate
T = Extended height double-wall plenum
w/ field-cut holes, ship separate
U = STD double-wall plenum w/field-cut
holes, ship separate
V = Low double-wall plenum w/field-cut
holes, ship separate
W =STD double-wall (perf) plenum
w/field-cut holes (90-110 ton only)
X = Low double-wall (perf) plenum
w/field-cut holes (90-110 ton only)
Y = Extended height double-wall (perf)
plenum w/field-cut holes, ship
separate (90-110 ton only)
0 = None
Digit 14 - Motor Type
2 = ODP motor
3 = TEFC motor
Digit 15, 16 - Motor HP
05 = 5 hp
07 = 7.5 hp
10 = 10 hp
15 = 15 hp
20 = 20 hp
25 = 25 hp
30 = 30 hp
40 = 40 hp
50 = 50 hp (400V, 460V, 575V only)
60 = 60 hp (90-110 ton only)
A = Steam coil
B = Hot water coil
C = Electric heat, 1 stage
D = Electric Heat (2 Stage)
F = Hydronic heat ctrl interface
G = Elec. heat ctrl interface, 1 stage
H = Elec. heat ctrl interface, 2-stage (90-
110 ton only)
J = Elec. heat ctrl interface, 3 stage (90-1
10 ton only)
K = Steam coil ship separate, LH
L = Hot water coil ship separate, LH
T = Hot water coil, high capacity, LH
U = Hot water coil, high capacity, LH, ship
1 = Disconnect switch
2 = Terminal block
3 = Dual point power (2 blocks)
PKG-PRC002U-EN17
Model Number Descriptions
Digit 25 - Industrial Options
A = Protective coating evaporator coil
B = Silver solder
C = Stainless steel screws
D = A and B
E = A and C
F = B and C
G = A, B, and C
0 = none
Digit 26 - Drain Pan Type
A = Galvanized sloped
B = Stainless steel sloped
Digit 27 - Waterside Economizer
A = Mechanical clean full capacity (4-row)
B = Mechanical clean low capacity (2-row)
C = Chemical clean full capacity (4-row)
D = Chemical clean low capacity (2-row)
0 = None
Digit 28 - Ventilation Control
B = Airside econ w/ Traq damper, top O/A
C = Airside econ w/ std damper, top O/A
E = Airside econ w/ Traq damper &
comparative enthalpy, top O/A
F = Airside econ w/ std damper &
D = Left hand basic piping
F = Left hand Intermediate piping
K = Left hand basic w/ flow switch
M = Left hand intermediate w/ flow switch
0 = None
Digit 30 - Condenser Tube Type
A = Standard condenser tubes
B = 90/10 CuNi condenser tubes
0 = None (air-cooled only)
Digit 31 - Compressor Service
Valves
1 = With service valves
0 = None
Digit 32 - Miscellaneous System
Control
1 = Timeclock
2 = Interface For remote HI (IPCB)
3 = Dirty filter switch
4 = 1 and 2
5 = 1 and 3
6 = 2 and 3
7 = 1, 2 and 3
0 = None
G = GBAS and VOM
H = GBAS and RHI
J = VOM and RHI
M =GBAS, VOM, and RHI
N = BACnet Communications Interface
(BCI)
P = BCI and GBAS
Q = BCI and VOM
R = BCI and RHI
T = BCI and GBAS and VOM
U = BCI and GBAS and RHI
V = BCI and VOM and RHI
W= BCI and GBAS and VOM and RHI
0 = None
1 = Lontalk Comm5 Interface (LCI)
2 = LCI and GBAS
3 = LCI and VOM
4 = LCI and RHI
5 = LCI and GBAS and VOM
6 = LCI and GBAS and RHI
7 = LCI and VOM and RHI
8 = LCI and GBAS and VOM and RHI
Rows4 or 624 or 634 or 66666
Sq. Ft.38.5749.0949.0949.0949.0949.0956.8156.8156.81
FPF144144144144144144144144144
Condenser Data
Min GPM w/o Econ648484102102112140168168
Min GPM w/ Econ648484102102112
Maximum GPM142186186226226248300350350
Evaporator Fan Data
Quantity1 11111111
Size (Dia.)25”25”25”27.5”27.5”27.5”27.5”27.5”27.5”
Minimum HP7.51010101010151515
Minimum kW(5.59)(7.46)(7.46)(7.46)(7.46)(7.46)(11.19)(11.19)(11.19)
Maximum HP305050505050606060
Maximum kW(22.37)(37.29)(37.29)(37.29)(37.29)(37.29)(44.74 )(44.74)(44.74)
Min Design CFM119601425015080169001870020800175001750017500
Max Design CFM195502210024650276252980029800350003500035000
2. EER and IEER are rated in accordance to ARI Standard 340/360-2 007. Based on 80/6 7° F (26.7/19.4 ° C) to ev apor ator coil, no minal airflow and 85-
95 °F (29.4/35 °C) condenser water.
3. All units operate with R-410A. Units ships with full operating charge.
4. Maximum cfm limits are set to prevent moisture carryover on the evaporator coil.
5. Minimum cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.
2. EER and IEER are rated in accordance to ARI Standard 340/360-2007. Based on 80/67° F (26.7/19.4 °C) to evaporator coil, nominal airflow and 85-
95 °F (29.4/35 °C) condenser water.
3. All units operate with R-410A. Units ship with a dry nitrogen holding charge. Field refrigerant system charge required. Refer to Table 5, p. 23for
amounts required.
4. Maximum cfm limits are set to prevent moisture carryover on the evaporator coil.
5. Minimum cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.
Figure 1. Airside Pressure Drop SCWF/SIWF 20, 22, 25
and SCRF/SIRF 20
Figure 2. Airside Pressure Drop SCWF/SIWF 29, 32 and
SCRF/SIRF 25, 29
Airside Pressure Drops
The dotted line on construction filters indicates cfm where face velocity exceeds manufacturer’s
recommended maximum of 300 fpm. After startup, construction filters must be replaced with
medium velocity or high velocity filters.
Air pressure drops through electric heat is 0.5 inches WC.
See “Discharge Plenum,” p. 30 for pressure drop through flexible horizontal discharge plenum and
“Heating Coils,” p. 29 for pressure drop through heating coils.
For 4-inch cartridge filters, air pressure drops must be added to the external static pressure design
point.
PKG-PRC002U-EN27
Performance Data
Figure 3. Airside Pressure Drop SCWF/SIWF 35, 38 and
SCRF/SIRF 30, 35
Figure 4. Airside Pressure Drop SCWF/SIWF 42, 46 and
SCRF/SIRF 40
Figure 5. Airside Pressure Drop SCWF/SIWF 52, 58 and
SCRF/SIRF 50
Figure 6. Airside Pressure Drop SCWF/SIWF 65, SCWF/
SIWF 72, SCWF/SIWF 80 and SCRF/SIRF 60
28 PKG-PRC002U-EN
Performance Data
Figure 7.Airside Pressure Drop SCWF/SIWF 90-110
4 Row Economizer
2 Inch Med Eff Filter
Airflow - CFMAirflow - CFMAirflow - CFM
Air Pressure Drop - Inches of WaterAir Pressure Drop - Inches of Water
Figure 8. Airside Pressure Drop Steam Coil 20 to 80-Ton
Units
For NS Coils
Figure 9. Airside Pressure Drop Hot Water Coil 20 to 80-