Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480301-01
Printed in U.S.A.
Form 48LC-8-12-07SI
Pg 1
5-2020
Replaces: 48LC-8-12-06SI
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Plan for Unit Location . . . . . . . . . . . . . . . . 9
Plan for Sequence of Unit Installation . . 10
Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 10
Provide Unit Support . . . . . . . . . . . . . . . . 10
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Field Fabricate Ductwork . . . . . . . . . . . . . 12
Rig and Place Unit . . . . . . . . . . . . . . . . . . 12
Convert to Horizontal and Connect
Ductwork (when required) . . . . . . . . . . . . . . . . . . 13
Install Outside Air Hood . . . . . . . . . . . . . . 14
• ECONOMIZER HOOD REMOVAL AND SETUP –
Install Flue Hood . . . . . . . . . . . . . . . . . . . . 15
Install Gas Piping . . . . . . . . . . . . . . . . . . 15
• FACTORY-OPTION THRU-BASE CONNECTIONS
Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Make Electrical Connections . . . . . . . . . 18
• UNITS WITHOUT FACTORY-INSTALLED NON-
• UNITS WITH FACTORY-INSTALLED NON-FUSED
• FACTORY-OPTION THRU-BASE CONNECTIONS
• UNITS WITHOUT THRU-BASE CONNECTIONS
• UNIT WITHOUT THRU-BASE CONNECTION KIT
Humidi-MiZer® System Control Connections
• HUMIDI-MIZER SYSTEM – SPACE RH CONTROLLER
RTU Open Controller (Factory-Installed Option) . . 31
SystemVu™ Controller (Factory-Installed Option)
Integrated Staging Control (ISC) Board . . . . . . . . . .32
• ISC BOARD - SEQUENCE OF OPERATION
EconoMi$er® X (Factory Option)
. . . . . . . . . . . . . . .34
• ECONOMIZER MODULE WIRING DETAILS
Staged Air Volume (SAV™) with Variable Frequency
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Multi-Speed VFD Display Kit (Field-Installed
Accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
• NAVIGATION KEYS AND STATUS LEDS
• CONNECTING THE KEYPAD TO THE VFD
• PROGRAM THE VFD FOR 3 DISCRETE INDOOR FAN
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
• COMPLETING INSTALLATION OF RETURN-AIR
Adjust Factory-Installed Options . . . . . .60
Install Accessories . . . . . . . . . . . . . . . . .60
Check Belt Tension . . . . . . . . . . . . . . . . .60
• BELT FORCE — DEFLECTION METHOD
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloths for brazing operations and have a fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult local
building codes and appropriate national electrical codes (in USA,
WeatherExpert
®
48LC 08-12
Single Package Rooftop
Gas Heat/Electric Cooling Unit
with Puron
®
(R-410A) Refrigerant
Содержание 48LC Series
Страница 5: ...5 Fig 2 Unit Dimensional Drawing Size 08 Unit ...
Страница 6: ...6 Fig 2 Unit Dimensional Drawing Size 08 Unit cont ...
Страница 7: ...7 Fig 3 Unit Dimensional Drawing Size 09 and 12 Units ...
Страница 8: ...8 Fig 3 Unit Dimensional Drawing Size 09 and 12 Units cont ...
Страница 11: ...11 Fig 6 Roof Curb Details Size 08 12 Units ...
Страница 21: ...21 Fig 34 48LC 08 12 Electro mechanical Control Wiring Diagram ...
Страница 22: ...22 Fig 35 48LC 08 12 RTU Open Control Wiring Diagram ...
Страница 23: ...23 Fig 36 48LC 08 12 SystemVu Control Wiring Diagram ...
Страница 24: ...24 Fig 37 48LC 08 12 Typical Power Wiring Diagram Electromechanical and RTU Open Controls 208 230 v Unit Shown ...
Страница 25: ...25 Fig 38 48LC 08 12 Typical Power Wiring Diagram SystemVu Control 208 230 v Unit Shown ...
Страница 61: ......