Airside Pressure Drop
Fan Data
Waterside Pressure Drop
Correction Factors/Heat of Rejection
Water-Cooled Unit Performance
Air-Cooled Unit Performance
Heating Coil Performance
Electrical Data
2
4
6
7
8
11
13
13
14
18
19
20
25
30
33
Dimensions and Weights
Mechanical Specifications
34
46
3PKG-PRC010-EN
Page 4
Features and
Benefits
Deluxe Self-Contained air conditioners,
available in 3–15 tons, are single package
units designed for low cost installation in
the conditioned space or equipment
room. Durable construction, strict quality
control, and demanding factory testing
ensure reliability from start-up through
years of operation.
All units are shipped fully factory assembled and tested, thereby reducing
field labor, installation time, and costs.
They can also be easily converted from
vertical to horizontal discharge arrangements to match most building configurations. Discharge can be either free or
ducted. Power and water connections can
be made from either side of the unit
adding to the unit flexibility.
Available Unit Configurations
3, 5, and 7.5-Ton Units
Standard Features
• 3 through 15-ton industrial/commerical
self-contained units
• Water-cooled or air-cooled condensing
applications
• Single point power connection
• Single point water connection on watercooled units
• Both water and power connections can
be made from either side of the unit
• Front or rear return air openings
• Vertical and horizontal discharge
arrangements
• UL listing on standard unit
• All compressors are protected with
internal motor winding temperature
cutouts
• All compressors have crankcase
heaters as standard
• Variable pitch sheaves allow for field
adjustment of airflow
• High pressure cutout switches on all
units
• Low pressure cutout switches on all
units
• High pressure relief device on watercooled units
Optional Features
• Hydronic heating coils
• Horizontal discharge plenums
• Water regulating valves for condensing
pressure control on water-cooled units
• Protective coating for unit and evaporator coil
• CuproNickel condensers
• Permanent filters
• Unit or remote mounted thermostats
• Low ambient control operation on aircooled condenser
• Oversized fan motor and drive kits
Front Return
standard
Rear Return
field convertible
Figure FB-1. Deluxe Self-Contained 3, 5, & 7.5-Ton Unit
With Vertical Discharge, As Shipped
4
field convertible
fan discharge
Front Return
standard
Figure FB-2. Deluxe Self-Contained 3, 5, & 7.5-Ton Unit
With Horizontal Discharge, Field Converted
Rear Return
field convertible
PKG-PRC010-EN
Page 5
Available Unit Configurations
10 and 15-Ton Units
Features and
Benefits
field convertible
clockwise vertical discharge
Front Return
field convertible
Rear Return
standard
Figure FB-3. Deluxe Self-Contained 10 & 15-Ton Unit With
Counter-Clockwise Vertical Discharge, As Shipped
field convertible
counter-clockwise
Front Return
field convertible
horizontal discharge
Rear Return
standard
Figure FB-5. Deluxe Self-Contained 10 & 15-Ton Unit With
Counter-Clockwise Horizontal Discharge, Field Converted
Front Return
field convertible
Rear Return
standard
Figure FB-4. Deluxe Self-Contained 10 & 15-Ton Unit With
Clockwise Vertical Discharge, Field Converted
Front Return
field convertible
Rear Return
standard
field convertible
clockwise horizontal
discharge
Figure FB-6. Deluxe Self-Contained 10 & 15-Ton Unit With
Clockwise Horizontal Discharge, Field Converted
Front Return
field convertible
Rear Return
standard
field convertible
counter-clockwise
horizontal discharge
Figure FB-7. Deluxe Self-Contained 10 & 15-Ton Unit With
Counter-Clockwise Horizontal Discharge, Field Converted
field convertible
clockwise vertical
Front Return
field convertible
discharge
Rear Return
standard
Figure FB-8. Deluxe Self-Contained 10 & 15-Ton Unit With
Clockwise Vertical Discharge, Field Converted
5PKG-PRC010-EN
Page 6
Application
CCRA Air-Cooled
CCRA Unit Location
Unobstructed condenser airflow is
essential to maintain 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.
Considerations
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. Nuisance
high head pressure tripouts 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 45 for recommended
lateral distances.
Condenser
Ambient Limitations
Standard ambient control allows operation down to 45°F (7.2°C) with cycling of
condenser fans. Units with the low
ambient option are capable of starting
and operating in ambient temperatures
down to 0°F (-17.8°C). 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 cataloged ambient temperature operation of a standard condenser is
115°F (46.1°C). Operation at design
ambient above 115°F can result in
excessive head pressures. For operation
above 115°F, contact the local Trane sales
office.
6
PKG-PRC010-EN
Page 7
Selection
Procedure
Selection Procedure
The selection of a deluxe self-contained
unit can be accomplished in three easy
steps.
Step 1 - Load
Determine the load requirements for
heating and cooling (include outside air)
using Trane’s load estimate program or
any standard method.
Step 2 - Unit Type
Self-contained air conditioners are
available in either water-cooled or
remote air-cooled models to match
individual needs.
Step 3 - Select the Unit
The conditions under which the unit must
operate and the design load will give the
final selection.
Selection Example
Design conditions for a water-cooled unit:
Entering air temperature = 80/67°F
Total gross capacity required = 64,400
Btu/h
Entering water temperature = 85°F
Leaving water temperature = 95°F
Airflow = 2,400 cfm at 0.5-inch duct static
pressure
Unit Selection
Tentatively select a 5-ton unit: Model
SCWB-B50. Refer to Table PD-10 on
page 21 to obtain gross total and sensible
unit capacities, gpm, and leaving water
temperature at nominal conditions:
Total capacity = 66 MBh
Sensible capacity = 45 MBh
Water flow rate = 20 gpm
Leaving water temperature = 93.1°F
Since the design cfm is greater than the
nominal cfm, the capacities and condenser water delta T must be adjusted to
reflect the higher cfm.
Multiply the capacities by the correction
factors:
66 MBh x 1.03 = 68.0 MBh
45 MBh x 1.05 = 47.3 MBh
The SCWB-B50 meets the total and
sensible design requirements.
Subtract the entering water temperature
from the leaving water temperature to
determine condenser water delta T of
8.1°F. Multiply the delta T by the cooling
capacity correction factor of 1.03 to
obtain the new delta T of 8.3°F and add
this to the entering water temperature to
obtain the actual leaving water temperature of 93.3°F. The leaving condenser
water temperature is within the design
delta T of 10°F.
Refer the fan data Table PD-1 on page 14
to determine approximate brake horsepower and fan rpm:
Fan brake horsepower = 1.09 bhp
Fan rpm = 934 rpm
Determine net capacities by subtracting
fan motor heat from gross capacities:
2.8 X 1.09 bhp = 3.1 MBh
Net total capacity = 67.8 MBh - 3.1 MBh
= 64.7 MBh
Net sensible capacity = 48.7MBh - 3.1
MBh = 45.6 MBh
Refer to the Trane psychrometric chart to
determine leaving air temperatures.
7PKG-PRC010-EN
Page 8
Selection
Model Number
Procedure
Description
Deluxe Self-Contained Model Number Description
Following is a complete description of the deluxe self-contained model number. Each digit in the model number has a corresponding code that identifies specific unit options.
S C W B B30 4 4 * *1011A012AA00FA0100U
1 2 3 4 567 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
B = UL and CSA Agency Approval
T = CSA Agency Approval
U = UL Agency Approval
0 = No Agency Approval
8
PKG-PRC010-EN
Page 9
Selection
Model Number
Procedure
Description
Self-Contained Accessory Model Number Description
A10100A0B00202A100
123456789101112131415161718
Digit 1 - Discharge Plenum
A = 3 Ton Standard Plenum
B = 3 Ton Protective Coated Plenum
C = 5 Ton Standard Plenum
D = 5 Ton Protective Coated Plenum
E = 7.5 Ton Standard Plenum
F = 7.5 Ton Protective Coated Plenum
G = 10 Ton Standard Plenum
H = 10 Ton Protective Coated Plenum
I= 15 Ton Standard Plenum
J = 15 Ton Protective Coated Plenum
0 = None
Digit 2 - Permanent Filters
1 = 3 Ton (1) 20 x 25 x 1
2 = 5 Ton (2) 16 x 25 x 1
3 = 7.5 Ton (4) 15 x 20 x 1
4 = 10 Ton (3) 20 x 25 x 2
5 = 15 Ton (8) 15 x 20 x 2
0 = None
Digit 3 - Front Return Air Grille
A = 10 Ton Front Return Air Grille
B = 10 Ton Protective Coated Front Rtn
Air Grille
C = 15 Ton Front Return Air Grille
D = 15 Ton Protective Coated Front Rtn
Air Grille
0 = None
Digit 4 - Rubber-In-Shear Isolators
1 = 3 Ton Isolators
2 = 5 Ton Isolators
3 = 7.5 Ton Isolators
4 = 10 Ton Standard Configuration
Isolators
5 = 10 Ton Horz. Inverted “L” Isolators
(Air-Cooled Units Only)
6 = 10 Ton Horz. Inverted “L” Isolators
(Water-Cooled Units Only)
7 = 15 Ton Standard Configuration
Isolators
8 = 15 Ton Horz. Inverted “L” Isolators
(Air and Water-Cooled Units)
0 = None
Digit 5 - Steel Spring Isolators
A = 3 Ton Isolators
B = 5 Ton Isolators
C = 7.5 Ton Isolators
D = 10 Ton Standard Configuration
A = 3, 5, & 7.5 Ton 0H/2C (Auto)
B = 10 & 15 Ton 2H/2C (Manual)
C = 10 & 15 Ton 2H/2C (Auto)
0 = None
Digit 8 - Programmable Night Setback
Thermostat
1 = 3, 5, & 7.5 Ton 1H/2C
2 = 10 & 15 Ton 2H/2C
0 = None
Digit 9 - Fan Motor Kits (Includes Drives)
A = 3 Ton,
B = 3 Ton,
C = 5 Ton, 1 HP, 208-230 Volt
D = 5 Ton, 1 HP, 460 Volt
E = 5 Ton, 1F = 5 Ton, 1-1/2 HP, 460 Volt
G = 7.5 Ton, 10 = None
Digit 10 - Oversize Fan Motor Kits
1 = 10 Ton, 3 HP, 208-230 & 460 Volt
2 = 15 Ton, 5 HP, 208-230 & 460 Volt
0 = None
Digit 11 - Accessory Drive Kits
A = 10 Ton, Underspeed Drive Kit
B = 15 Ton, Underspeed Drive Kit
C = 10 & 15 Ton, Overspeed Drive Kit
D = 15 Ton, Extra Overspeed Drive Kit
0 = None
Digit 12 - Hot Water Heating Coil
1=3 Ton
2 = 3 Ton with Corrosion Protection
3=5 Ton
4 = 5 Ton with Corrosion Protection
5 = 7.5 Ton
3
/4 HP, 208-230 Volt
3
/4 HP, 460 Volt
1
/2 HP, 208-230 Volt
1
/2 HP, 208-230 & 460 Volt
6 = 7.5 Ton with Corrosion Protection
7 = 10 Ton
8 = 10 Ton with Corrosion Protection
9 = 15 Ton
A = 15 Ton with Corrosion Protection
0 = None
Digit 13 - Steam Heating Coil
A=3 Ton
B = 3 Ton with Corrosion Protection
C=5 Ton
D = 5 Ton with Corrosion Protection
E = 7.5 Ton
F = 7.5 Ton with Corrosion Protection
G = 10 Ton
H = 10 Ton with Corrosion Protecton
I= 15 Ton
J = 15 Ton with Corrosion Protection
0 = None
Digit 14 - 90/10 Cupronickel Condensers
1 = 3 Ton CuNi Condenser
2 = 3 Ton CuNi Protective Coated
Condenser
3 = 5 Ton CuNi Condenser
4 = 5 Ton CuNi Protective Coated
Condenser
5 = 7.5 Ton CuNi Condenser
6 = 7.5 Ton CuNi Protective Coated
Condenser
7 = 10 Ton CuNi Condenser
8 = 10 Ton CuNi Protective Coated
Condenser
9 = 15 Ton CuNi Condenser
A = 15 Ton CuNi Protective Coated
Condenser
Digit 15 - Water Regulating Valve Kit
A = 3 Ton Water Reg. Valve Kit
B = 5 & 7.5 Ton Water Reg. Valve Kit
C = 10 & 15 Ton Water Reg. Valve Kit
Digit 16 - Anti-Recycle Timer
1 = Anti-Recycle Timer
0 = None
Digit 17 - Time Delay Relay
1 = 10 & 15 Ton Time Delay Relay
0 = None
Digit 18 - Low Ambient Damper
A = 3 & 5 Ton Low Ambient Damper
B = 7.5 Ton Low Ambient Damper
C = 10 Ton Low Ambient Damper
D = 15 Ton Low Ambient Damper
0 = None
Quantity12222
Minimum gpm58111523
Minimum liters / sec.(.32)(.50)(.69)(.95)(1.45)
Maximum gpm122 0304050
Maximum liters / sec.(.76)(1.26)(1.89)(2.52)(3.15)
Minimum EWT w/out valve, °F6565656565
Minimum EWT with valve, °F3535353535
Evaporator Fan Data
Quantity11122
Size Dia. x width - inches10 x 1012 x 1215 x 1512 x 912 x 9
Size Dia. x width - mm(254x254)(305x305)(381x381)(305x229)(305x229)
Standard HP
Oversized HP Available
Minimum Design cfm9601600240032004800
Minimum Design liter / sec.(453)(755)(1133)(1510)(2265)
1
/
2
3
/
4
Maximum Design cfm14402400360048007200
Maximum Design liter / sec.(680)(1133)(1699)(2265)(3398)
Steam Coil
Coil TypeSDSSDSSDSNSNS
Rows11111
Size (inches)12 x 23
Size (mm)(305 x 591)(381 x 711)(457 x 811)(305 x 1346) (305 x 1854)
1
/
FPF180180180144144
Hot Water Coil
Coil TypeWCWCWCWCWC
Rows22222
Size (inches)15 x 20
Size (mm)(381 x 519)(381 x 635)(381 x 737)(742 x 1388) (508 x 1921
7
/
FPF108108108108108
Notes:
1. All units operate with R-22. Water-cooled units ship with full operating charge. Air-cooled units ship with a dry nitrogen
holding charge.
2. Hot water coils do not have turbulators. See Capacity DataTables PD-19 and PD-20 for coil capacities.
3. Steam Coil capacities are shown in Table PD-21.
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.
6. SCWB/SIWB/SCRB/SIRB 3, 5, 7.5, and 10 ton units are rated at ARI Standard 210/240-1994. SCWB/SIWB/SCRB/SIRB 15-ton
units are rated at ARI Standard 340/360-2000.
7. SCRB/SIRB 3 and 5-ton units are rated as SEER.
3
/
4
1, 1-1/
2
15 x 2818 x 31 15/
4
15 x 2515 x 29 5/820 x 54 5/820 x 75 5/
16
123
1-1/
2
35
12 x 5312 x 73
16
8
11PKG-PRC010-EN
Page 12
Air-Cooled
General Data
Condenser
Table GD-2. CCRA/CIRA Remote Air-Cooled Condenser General Data
Number/Type1/Prop1/Prop2/Prop2/Prop4/Prop
Size (inches)18”22”22”22”20”
Size (mm)(457)(559)(559)(559)(508)
Fan DriveDirectDirectDirectDirectDirect
No. of Motors/HP ea.1/0.331/0.752/0.752/0.754/0.75
Nominal cfm
Nominal (liters / sec)
Condenser Coil Data
Circuit 1 Size (in.)36 x 4836 x 4872 x 9636 x 4836 x 48
Circuit 1 Size (mm)(914 x 1219) (914 x 1219) (1828x 2438) (914 x 1219) (914 x 1219)
Circuit 2 No./Size (in.)n/an/an/a36 x 4836 x 48
Circuit 2 No./Size (mm)(914 x 1219) (914 x 1219)
Face Area (sq. Ft.)12.012.024.024.024.0
Face Area (sq.m)(1.1)(1.1)(2.2)(2.2)(2.2)
Rows/fpf2/1443/1443/1443/1443/144
1. Gross heat rejection is at a 30°F (-1.1°C) ITD (initial temperature difference) between condensing temperature and
ambient air entering condenser (includes the effect of subcooling).
12
PKG-PRC010-EN
Page 13
Performance
Heating
Data
Chart PD-1. Heating Coil Airside Pressure Drop
Pressure Drop, in. wc.
Coils
Chart PD-2. Plenum Airside Pressure Drop
Pressure Drop, in. wc.
Unit Airflow, cfm
Unit Airflow, cfm
13PKG-PRC010-EN
Page 14
Performance
Data
Fan Data
Table PD-1. Fan Performance Data, 0.10 to 0.80 esp
Note: Chart PD-3 includes factory piping and condenser. If adding a water regulating valve, add valve WPD to the
value in Chart PD-3. 10 and 15 ton units use two water regulating valves. Therefore, divide the gpm and WPD by 2 to
determine values through each valve.
Table PD-5. Water Regulating Valve Pressure Drop, ft of water
Notes: 1. All capacities shown are gross and have not considered indoor fan heat. 2. TOT = total gross cooling capacity. 3. SEN = sensible heat capacity.
Notes: 1. All capacities shown are gross and have not considered indoor fan heat. 2. TOT = total gross cooling capacity. 3. SEN = sensible heat capacity.
Notes: 1. All capacities shown are gross and have not considered indoor fan heat. 2. TOT = total gross cooling capacity. 3. SEN = sensible heat capacity.
Notes: 1. All capacities shown are gross and have not considered indoor fan heat. 2. TOT = total gross cooling capacity. 3. SEN = sensible heat capacity.
Notes: 1. All capacities shown are gross and have not considered indoor fan heat. 2. TOT = total gross cooling capacity. 3. SEN = sensible heat capacity.
Notes: 1. Performance based on matched air-cooled unit and remote condenser. 2. All capacities are gross and have not considered indoor fan heat. 3. CAP = total gross cooling capacity. 4. SHC =
Notes: 1. Performance based on matched air-cooled unit and remote condenser. 2. All capacities are gross and have not considered indoor fan heat. 3. CAP = total gross cooling capacity. 4. SHC =
Notes: 1. Performance based on matched air-cooled unit and remote condenser. 2. All capacities are gross and have not considered indoor fan heat. 3. CAP = total gross cooling capacity. 4. SHC =
sensible heat capacity.
Notes: 1. Performance based on matched air-cooled unit and remote condenser. 2. All capacities are gross and have not considered indoor fan heat. 3. CAP = total gross cooling capacity.
Notes: 1. Performance based on matched air-cooled unit and remote condenser. 2. All capacities are gross and have not considered indoor fan heat. 3. CAP = total gross cooling capacity. 4. SHC =
sensible heat capacity.
RLA = Rated Load Amps
Compressor LRA = Locked Rotor Amps
Fan Motor LRA = Locked Rotor Amps,
N.E.C. Table 430 - 151
FLA = Full Load Amps, N.E.C.
Table 430 - 150
Voltage utilization range is ±10 percent
Determination of Minimum Circuit
Ampacity (MCA)
MCA = 1.25 x largest motor amps (FLA
or RLA) + the sum of the remaining motor
amps.
Determination of Maximum Fuse Size
(MFS) and Maximum Circuit Breaker Size
(MCB)
MFS and MCB = 2.25 x largest motor
amps (FLA or RLA) + the sum of the
remaining motor amps.
If the rating value determined does not
equal a standard current rating of over
current protective device, use the next
lower standard rating for the marked
maximum rating.
Note: MFS for CXRA units is for non-time
delay fuses.
Table ED-1. SCWB/SIWB/SCRB/SIRB Electrical Data
SCWB/SIWB SCRB/SIRB
Compressor Motor Data Compressor Motor Data Fan Motor Data SCWB/SIWBSCRB/SIRB
Note: Fan motor kW base on three phase motors. Compressor kW based on 80/67°F to evaporator, nominal airflow, and 105ºF condensing temperature, 3 phase/60hz.
Clearances: 36” perimeter clearance required on at least 3 sides, with one of
these being the control panel side. 72” top clearance required for fan discharge.
45PKG-PRC010-EN
Page 46
Mechanical
Specifications
Deluxe Self-Contained
SCRB/SIRB/SCWB/SIWB
Cabinet
The unit framework is heavy gauge
welded steel construction. Exterior panels
are fabricated from 18-gauge zinc coated
galvanized steel. The unit exterior is
cleaned, phosphatized, and painted with
an air-dry enamel finish. The fan and
compressor sections are insulated with
¾-inch (19 mm) one-pound (0.5 kg)
density fiberglass insulation.
The unit is provided with removable
panels to allow service access to compressors, condensers, fan motor, bearings, coils, and valves. Knockouts are
provided on both sides of the unit to allow
electrical power, control wiring, piping
connections, and fan shaft removal (10
and 15-ton units only). A decorative
return air grille is provided on all 3, 5 and
7.5 ton units. The 10 and 15-ton cabinet
separates into two sections for conversion into a horizontal configuration. This
configuration has front and back access
panels on the coil and compressor
sections and front and back access to the
blower section.
Compressors
The 3, 5, and 7.5 ton units have a single
compressor and 10 and 15-ton units have
dual compressors. Compressors are
hermetic 3600 rpm motors with crankcase heaters as standard. Each compressor has its own independent refrigerant
circuit. The compressors are protected
with internal motor winding temperature
cutouts and are mounted on rubber-inshear isolators for vibration isolation.
Condenser (Water-Cooled)
The condenser is a shell and coil design
with a finned, copper, inner tubing, and a
steel outer shell. Piping connections are
from either side of the unit. Each refrigerant circuit is provided with a separate
condenser or pair of condensers. Condenser waterside working pressure
cannot exceed 400 psig.
Evaporator
The evaporator coil is constructed of
seamless copper tubes expanded into
aluminum fins. Tubes are
OD with internally enhanced surfaces.
Coils are factory leak tested to 475 psig.
3
/8-in (9.5 mm)
The drain pan is galvanized steel. Knockouts are provided on both sides of the
unit for condensate removal.
Refrigerant Circuit (Water-Cooled)
Refrigerant circuits are independent and
completely piped including filter driers,
distributors and thermal expansion
valves with non-adjustable superheat.
The circuits are leak-tested, dehydrated,
and charged with oil and Refrigerant-22
at the factory. Shrader access valves are
provided in the suction and liquid lines.
Refrigerant Circuit (Air-Cooled)
Refrigerant circuits are independent and
completely piped including distributors
and thermal expansion valves with nonadjustable superheat. The circuits are
leak tested, dehydrated, and charged
with oil and nitrogen at the factory.
Shrader access valves are provided in
the suction and liquid lines.
Supply Fan
The 3, 5 and 7.5 ton units have a single
supply fan and the 10 and 15-ton units
have two supply fans. Supply fans are
forward curved centrifugal-type. The 10
and 15-ton units are secured to a solid
steel shaft with permanently lubricated
bearings. The drive components include
variable pitch sheaves and V-belts. The
supply fan motor is an open drip-proof
type with a standard NEMA frame,
permanently lubricated motor bearings,
and a service factor of 1.00 minimum.
The fan wheel is dynamically balanced at
the factory.
Filters
One-inch throwaway filters are installed
in the coil section of the unit.
Unit Controls
All units are provided with a terminal
block.
Agency Listing
The unit has the US Underwriter’s
Laboratory agency listing and/or the
Canada CSA agency listing.
Deluxe Self-Contained
Options
Protective Coating
Unit
The unit’s exterior and exposed interior
shall have a four to six mil coat protective
coating.
Coil
The evaporator coil shall have a corrosion
protective coating consisting of a conversion layer and a polyurethane top layer
applied to protect in harsh environments.
Hydronic Heating Coils
Hot Water
The hot water coil shall be a two-row,
type WC heating coil and is field installed
inside the unit’s cabinet.
Steam
The 3, 5, and 7.5-ton steam coil shall be a
one-row, type SDS heating coil. The 10
and 15 ton steam coil shall be a one-row,
type NS heating coil. Steam coils shall be
field installed inside the unit’s cabinet.
Discharge Plenum
The discharge plenum shall be provided
with double deflection louvers to provide
horizontal discharge.
Cupro-Nickel Condenser
The condenser shall be shell and coil
design with 90-10 cupro-nickel inner
tubing. Piping connections shall be made
from either side of the unit. Each refrigerant circuit shall be provided with a
separate condenser or pair of condensers. Condenser waterside working
pressure shall be 400 psig.
Permanent Filter
One-inch permanent filters shall be
provided for field installation in the coil
section of the unit.
Return Air Grille
A decorative return air grille shall be
provided for field installation on 10 and
15-ton units.
Oversized Fan Motor Kit
Oversized fan motors and drive kits shall
be available for those applications where
external static pressure exceeds the
capability of the standard fan motor.
Water Regulating Valve
A water regulating valve shall be provided for each condenser circuit to control
condensing pressure. The
includes a capillary tube adapter fitting to
connect the liquid line Shrader valve. The
water regulating valve drops the waterside operating pressure to 250 psig.
3
/4-inch valve
46
PKG-PRC010-EN
Page 47
Mechanical
Specifications
Time Delay Relay
A time delay relay shall provide a four
minute time delay prior to starting the
second compressor on 10 and 15-ton
units to help prevent power demand
surges.
Anti-Recycle Timer
An anti-recycle timer shall be provided to
protect the compressor from excessive
cycling. Compressors will lock out for five
minutes when either the thermostat
contacts open or there is a momentary
power outage.
Rubber-in-Shear Isolation
Rubber-in-shear isolation pads shall be
provided for installation under the base of
the unit for vibration isolation.
Spring Isolation
Spring vibration isolators shall be
provided for installation under the base of
the unit for vibration isolation.
Unit Mounted Thermostat
Unit mounted cooling only thermostat
with up to two stages of cooling can be
factory or field installed on the unit.
Remote Mounted Thermostat
A remote 0heat/2cool thermostat shall be
provided on 3, 5, and 7.5 ton units. A
remote 2heat/2cool manual or auto
thermostat shall be provided on 10 and
15-ton units.
Remote Programmable Thermostat
A remote programmable 1heat/2cool
thermostat shall be provided on 3, 5 and
7.5 ton units. A remote programmable
2heat/2cool thermostat shall be provided
on 10 and 15-ton units.
Remote Air-Cooled Condenser
CCRA/CIRA
Cabinet
The unit framework is formed of heavy
gauge welded steel. Exterior panels are
fabricated from 18-gauge galvanized
steel.
Refrigerant Circuits and Controls
The 3, 5, and 7.5-ton units shall have a
single refrigerant circuit and the 10 and
15-ton unit have dual refrigeration
circuits. All units are provided with an
integral subcooling circuit and factory
installed controls to run the unit fans. The
control panel includes fan motor
contactors, a terminal block connection
for compressor interlock, and a 115-volt
control power transformer.
Condenser Coil
A condenser coil with a slab-type
arrangement is provided. The coil is
constructed of seamless,
O.D. copper tubes, expanded into
aluminum fins. Each circuit includes an
integral subcooler. The coil is leak-tested
under water at 425 psig.
Condenser Fan and Motor
Condenser fans are weatherproof with a
permanently lubricated motor and builtin thermal overload protection. Fans are
direct drive type and are statically and
dynamically balanced at the factory. The
3 and 5-ton units have a single condenser
fan. The 7.5 and 10-ton units have two
condenser fans. The 15-ton unit has four
condenser fans.
Protective Coating Option Unit
The unit interior and exterior shall have a
four to six mil protective coating applied
with an air-dry process.
Condenser Coil
The condenser coil has a corrosion
protective coating consisting of a
conversion layer and a polyurethane top
layer applied to protect from harsh
environments.
Low Ambient Operation Option
The low ambient damper allows operation down to 0°F (-17.78°C) by utilizing
additional fan cycling and an external
damper assembly for head pressure
control. The low ambient damper
includes a 16-gauge damper assembly,
HCFC-22 operator, tubing and adapter
fittings, rubber grommet, and all necessary mounting hardware and instructions for field installation.
Agency Listing
The unit has the US Underwriter’s
Laboratory agency listing and/or the
Canada CSA agency listing.
3
/8-in (9.5 mm)
47PKG-PRC010-EN
Page 48
The Trane Company
A Division of American Standard Inc.
www.trane.com
For more information, contact your local Trane
office or e-mail comfort@trane.com
An American Standard Company
Literature Order NumberPKG-PRC010-EN
File NumberPL-UN-PKG-PRC010-EN 1201
SupersedesPKG-DS-2 10/98
Stocking LocationLa Crosse – Inland
The Trane Company has a policy of continuous product improvement and reserves the right to change design and
specifications without notice.
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