Unitary products group LL-15 User manual

INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
START TO INSTALL UNIT.
SAVE THIS MANUAL
SPLIT-SYSTEM
AIR COOLED
EVAPORATOR BLOWER
MODELS: LL-15, LL-20
66339-BIM-C-0206
LL-20
LL-15
CONTENTS
NOMENCLATURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
NOTES, CAUTIONS AND WARNINGS. . . . . . . . . . . . . .4
REPLACEMENT PARTS. . . . . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
FOR A COMPLETE TABLE OF CONTENTS, SEE FOLLOWING
PAGE.

66339-BIM-C-0206
2Unitary Products Group
IMPROPER INSTALLATION MAY CREATE A
CONDITION WHERE THE OPERATION OF
THE PRODUCT COULD CAUSE PER-
SONAL INJURY OR PROPERTY DAMAGE.
IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTE-
NANCE CAN CAUSE INJURY OR PROP-
ERTY DAMAGE. REFER TO THIS MANUAL
FOR ASSISTANCE OR ADDITIONAL
INFORMATION, CONSULT A QUALIFIED
INSTALLER, SERVICE AGENCY OR THE
GAS SUPPLIER.
THIS PRODUCT MUST BE INSTALLED IN
STRICT COMPLIANCE WITH THE
ENCLOSED INSTALLATION INSTRUC-
TIONS AND ANY APPLICABLE LOCAL,
STATE, AND NATIONAL CODES INCLUD-
ING BUT NOT LIMITED TO, BUILDING,
ELECTRICAL AND MECHANICAL CODES.
TABLE OF CONTENTS
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
NOTES, CAUTIONS AND WARNINGS. . . . . . . . . . . . . . . . 4
REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BLOWER MOTOR MOUNTING LOCATIONS. . . . . . . . . . . 5
MOTOR MOUNT ARRANGEMENTS. . . . . . . . . . . . . . . . . . 5
AIR DISCHARGE CONVERSION . . . . . . . . . . . . . . . . . . . . 6
AIR DISCHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
UNIT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RIGGING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MOUNTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DUCT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSULATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SUPPLY AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RETURN AIR DUCT ANGLES . . . . . . . . . . . . . . . . . . . . 11
DRAIN CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 11
REFRIGERANT MAINS . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
EVAPORATOR SECTION PIPING . . . . . . . . . . . . . . . . . 12
SUPPLY AIR BLOWER ADJUSTMENT. . . . . . . . . . . . . . . 12
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . 14
INDOOR UNIT ELECTRICAL RATINGS . . . . . . . . . . . . . . 14
LIST OF FIGURES
Fig. Pg.
1 Product Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Factory Motor Mounting Position. . . . . . . . . . . . . . . . . 5
3 Typical Motor Mounting Assembly. . . . . . . . . . . . . . . . 5
4 Ll-15 Motor Arrangements. . . . . . . . . . . . . . . . . . . . . . 6
5 Ll-20 Motor Arrangements. . . . . . . . . . . . . . . . . . . . . . 7
6 Vertical Airflow Arrangements . . . . . . . . . . . . . . . . . . . 8
7 Horizontal Airflow Arrangements . . . . . . . . . . . . . . . . . 8
8 Horizontal Application Corner Weights . . . . . . . . . . . . 9
9 Vertical Application Corner Weights
(See Table On Page 9 For Weights) . . . . . . . . . . . . . 10
10 Suggested Method For Connecting Ductwork . . . . . . 11
11 Recommended Drain Piping . . . . . . . . . . . . . . . . . . . 11
12 Hole Locations For Pressure Drop Readings
(15 Ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
13 Hole Locations For Pressure Drop Readings
(20 Ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
14 Pressure Drop Across Indoor Coil (15 Ton). . . . . . . . 15
15 Pressure Drop Across Indoor Coil (20 Ton). . . . . . . . 15
16 15 Ton Blower Performance . . . . . . . . . . . . . . . . . . . 17
17 20 Ton Blower Performance . . . . . . . . . . . . . . . . . . . 17
18 Unit Dimensions Ll-15 And Ll-20 . . . . . . . . . . . . . . . . 18
19 Piping And Electrical Connection Locations . . . . . . . 19
LIST OF TABLES
Tbl. Pg.
1 Physical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 approximate rpm chart. . . . . . . . . . . . . . . . . . . . . . . . 14
3 LL-15 15 Ton AirFlow. . . . . . . . . . . . . . . . . . . . . . . . . 16
4 LL-20 20 Ton Airflow . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Unit Dimensions lL-15 and lL-20 . . . . . . . . . . . . . . . . 18
6 Piping And Electrical Connection Sizes. . . . . . . . . . . 19

66339-BIM-C-0206
Unitary Products Group 3
FIGURE 1 - Product Nomenclature
INDOOR SPLIT UPG PRODUCT NOMENCLATURE
LL -15 C 00 A T A AA 1 A
Model # Model Number
Description Options
L Product Category L = Air Handling Unit - Cooling F = Air Handling Unit - Heat Pump
F Product Identifier F = R-22 Standard Efficiency 2-Pipe
L = R-22 Standard Efficiency 4-Pipe
-15 Nominal Cooling Capacity
MBH
-15 = 15 Ton
-20 = 20 Ton
CHeatType C = Cooling Only
00 Nominal Heating
Capacity 00 = No Heat Installed
A Airflow Options A = Standard Motor
TVoltage W = 460-3-60
S = 208/230-460-3-60 X = 575-3-60
A Factory Options A = None
AA Special Options AA = None
1 Generation 1 = First Generation 2 = Second Generation
A Product Style A = Style A B = Style B

66339-BIM-C-0206
4Unitary Products Group
GENERAL
The LL-15 and LL-20 evaporator units are designed for
use with the LL-15 and LL-20 Series condensing units.
Each unit consists of a coil section and a blower sec-
tion that are factory assembled and shipped. As shown
in arrangement 1 of figure 5, these sections may be
rearranged in the field for other air discharge patterns.
See figures 5, 6 and 7.
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words:
NOTE, CAUTION and WARNING. Notes are intended
to clarify or make installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment
damage may result if installation procedure is not han-
dled properly.
REPLACEMENT PARTS
Refer to parts manual for complete listing of replace-
ment parts on this equipment. The above forms and all
other forms referenced on this instruction may be
ordered from;
Standard Register
Telephone: [phone]
Toll Free Fax: [phone]
INSPECTION
As soon as a unit is received, it should be inspected for
possible damage during transit. If damage is evident,
the extent of the damage should be noted on the car-
rier’s freight bill. A separate request for inspection by
the carrier’s agent should be made in writing.
TABLE 1: PHYSICAL DATA
DESCRIPTION MODEL
LL-15 LL-20
EVAPORATOR COIL
Rows Deep X Rows High
Finned Length
Face Area, Feet
Tube (copper) OD, Inches
Fins (aluminum) per 1 inch
3 x 32
83
18.4
3/8
13
3 x 40
81
22.5
3/8
16
Piping Connections, Inches Liquid, Inches 5/8 5/8
Suction, Inches 1 1/8 1 3/8
CENTRIFUGAL BLOWERS (2
PER UNIT) Diameter X Width, Inches (Forward Curved) 15 X 12 18 X 18
FILTERS (THROWAWAY)
Size and Quantity Per Model,
Inches
16 X 25 X 2
20 X 20 X 2
20 X 24 X 2
20 X 25 X 2
25 X 25 X 2
-
4
-
4
-
-
-
-
10
-
Total Face Area, Feet 26.7 34.7
OPERATING CHARGE
(LBS 4-22) System 1 System 2 15.0 15.0 17.0 17.0
COMPONENT WEIGHT
Basic Unit (Less Motor & Drives)
Shipping Weight (lbs)
Operating Weight (lbs)
720
720
830
990
990
1115
Accessories
Hot Water Coil
Steam Coil
Supply Air Plenum
Return Air Grille
165
175
185
25
225
210
N/A
N/A
Blower Motor (1750 RPM)
(Field Installed) 120 (5 hp) 47 (3 hp) 120 (5 hp)

66339-BIM-C-0206
Unitary Products Group 5
LIMITATIONS
This unit must be installed in accordance with all
national and local safety codes. If no local codes apply,
installation must conform to the appropriate National
Code. The unit is designed to meet National Safety
Code Standards. If components are to be added to a
unit to meet local codes, they are to be installed at the
dealer’s and/or the customer’s expense.
BLOWER MOTOR MOUNTING LOCATIONS
Units are shipped from the factory less motor and
drives. The blower motor and drive packages are
ordered and shipped separately for field mounting.
MOTOR MOUNT ARRANGEMENTS
The motor mounting arrangement can be changed to
allow motor access based on the airflow arrangement
required. The recommended motor location for each
blower arrangement is as follows.
The units are shipped with the motor mount as shown
in figure 3.
If this is the desired position, the motor mounting
assembly is already in the correct position and the
motor and drive package can be installed without mod-
ifications.
FIGURE 2 - FACTORY MOTOR MOUNTING POSITION
MOTOR MOUNTING
CHANNELS ARE
ALWAYS SHIPPED
IN THIS LOCATION
FOR LL-20 UNITS
MOTOR MOUNTING
CHANNELS ARE
ALWAYS SHIPPED
IN THIS LOCATION
FOR LL-15 UNITS
FIGURE 3 - TYPICAL MOTOR MOUNTING ASSEMBLY

66339-BIM-C-0206
6Unitary Products Group
NOTE: The blower section must be lifted off the evap-
orator section to gain access to the mounting
channel fasteners. Since these sections have
to be repositioned for the arrangements 2
through 10 and 12 of figures 4 and 5, the
motor mounting assembly should be relocated
before the two sections are rejoined.
AIR DISCHARGE CONVERSION
AIR DISCHARGE
The units are shipped for upflow operation, but may be
converted for any of the illustrated air discharge pat-
terns shown in figures 5 and 6. Convert as follows:
1. Remove the panels from the blower section.
2. Remove the Phillips machine screws located inside
casing corner angles that hold the coil and blower
sections together.
3. Rotate the blower section for the desired air dis-
charge pattern.
NOTE: Before proceeding to step 4, see the section
on the blower motor mounting locations and
mount the blower motor in the desired position.
4. If accessory heating coils are used, mount heating
coil between cooling coil and blower sections.
Screw fastening locations are the same for all sec-
tions and heating accessories. If heating coils are
not used, fasten coil section to blower section with
machine screws removed in step 2.
5. Before replacing panels, see duct connections and
drain connections.
6. Replace panels.
FIGURE 4 - LL-15 MOTOR ARRANGEMENTS

66339-BIM-C-0206
Unitary Products Group 7
FIGURE 5 - LL-20 MOTOR ARRANGEMENTS
ARRANGEMENT 1, 4, 8, OR 11
ARRANGEMENT 3, 5 OR 10
ARRANGEMENT 2, 6 OR 7
NOTE: Since the motor mounting assembly can-
not be secured to the panel with the
blower openings, the motor cannot be
installed in any of the normally recom-
mended bottom positions.
ARRANGEMENT 9 OR 12

66339-BIM-C-0206
8Unitary Products Group
FIGURE 6 - VERTICAL AIRFLOW ARRANGEMENTS
AIR
AIR
BLOWER
1
EVAPORATOR
COIL AIR
AIR
2
AIR
AIR
AIR
AIR
4
AIR
AIR
5
AIR
AIR
6
3
* IF REQUIRED, SOME AIR CAN
BE BROUGHT THROUGH THE
BOTTOM OF THE EVAPORATO
R
SECTION.
**
*
**
*
FIGURE 7 - HORIZONTAL AIRFLOW ARRANGEMENTS
AIR
AIR
AIR
AIR
AIR
AIR
AIR
AIR
AIR
AIR
AIR
AIR
78 9
11 12 10

66339-BIM-C-0206
Unitary Products Group 9
UNIT INSTALLATION
LOCATION
The evaporator blowers are not designed for outdoor
installation. They must be located inside the building
structure, either inside or outside the conditioned
space where they are protected from rain and other
such moisture.
The unit should be located as close to the condensing
unit as practical and positioned to minimize bends in
the refrigerant piping.
Units being installed vertically or horizontally can be set
directly on a floor or platform, or supported by metal or
wooden beams.
Units being installed horizontally can be suspended
from above. Refer to the installation instructions of the
appropriate horizontal suspension kit.
RIGGING
Care must be taken when moving the unit. Do not
remove any packaging until the unit is near the place of
installation. SPREADER BARS SHOULD BE USED
BETWEEN THE SLINGS TO PREVENT CRUSHING
THE UNIT FRAME OR PANELS.
When preparing to move the unit, always determine the
center of gravity of the unit in order to equally distribute
the weight. Rig the unit by attaching chain or cable
slings around the bottom skid. A lift truck may be used
to raise a unit to a suspended location. Refer to table 2
for the total unit operating weight.
CLEARANCES
A 25-inch clearance is required on the end with the pip-
ing connections and the supply air blower motor to
properly service and maintain the unit and to replace
the filters.
Some clearance will also be required for the duct and
power wire connections. A clearance equal to the unit
width is required on one end of the unit if the blower
shaft or evaporator coil is to be replaced without mov-
ing the unit.
MOUNTING
The evaporator blower may be suspended from the
joists with isolation type hangers or hooks. A suspen-
sion accessory, which includes three suspension chan-
nels and hardware, may be ordered separately. The
corner weights for each unit are shown on pages 9 and
10.
Unit Size Position Shipping Weight Operating Weight ABCD Unit Length Unit Width
15 Ton Indoor Horizontal 720 830 155 187 207 171 89.5 59
15 Ton Indoor Vertical 720 830 172 194 188 166 89.5 29.5
20 Ton Indoor Horizontal 990 1115 230 345 249 166 100 74
20 Ton Indoor Vertical 990 1115 263 238 232 256 100 36.5
FIGURE 8 - HORIZONTAL APPLICATION CORNER WEIGHTS
DC
20 Ton Motor Location
Return Air
A
B
Horizontal Application Corner Weights
15 Ton Motor Location
Supply Air

66339-BIM-C-0206
10 Unitary Products Group
DUCT CONNECTIONS
Ductwork should always be suspended with hangers or
supported by legs. It should never be fastened directly
to the building structure.
Allow clearance around ducts for safety in the handling
of heated air and for insulation when required.
INSULATION
Ductwork insulation should meet the following criteria:
1. Be used when ducts pass through an uncondi-
tioned space in the cooling season or through an
unheated space during the heating season.
2. Include a vapor barrier around the outside to pre-
vent the absorption of moisture.
3. Be no less than 2 inches thick with the weather-
proof coating when applied to ducts exposed to
outdoor conditions.
SUPPLY AIR DUCTS
See figure 8 for suggested method of connecting sup-
ply air ductwork. Non-flammable material collars
should be used to minimize the transmission of noise
and/or vibration.
FIGURE 9 - VERTICAL APPLICATION CORNER WEIGHTS
(See Table on page 9 for Weights)
Supply Air
15 Ton
Motor Location
20 Ton Motor
Location
Return Air
A
B
C
D
(Rear Corner)