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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480267-01
Printed in U.S.A.
Form 48LCB-14-26-02SI
Pg 1
9-19
Replaces: 48LCB-14-26-01SI
Installation Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . 19
Step 2 — Plan for Sequence of Unit Installation . . . 19
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . . 20
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Tubing Installation . . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 9 — Install Outside Air Hood . . . . . . . . . . . . . . 25
Step 10 — Economizer - Horizontal Airflow Units . 26
Step 11 — Install Flue Hood and Combustion Air
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Step 12 — Install Gas Piping. . . . . . . . . . . . . . . . . . . 26
• FACTORY-OPTION THRU-BASE CONNECTIONS
Step 14 — Make Electrical Connections . . . . . . . . . 29
• 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
• TRANSFORMER CONNECTION FOR 208-V POWER
VAV-RTU Open Controller . . . . . . . . . . . . . . . . . . . . . 35
Integrated Staging Control (ISC) Board . . . . . . . . . . 36
Variable Air Volume (VAV) with Variable Frequency
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
• MULTI-SPEED VFD DISPLAY KIT (FIELD-
• CONNECTING THE KEYPAD TO THE VFD
• PROGRAM THE VFD FOR INDOOR FAN CONTROL
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
• RETURN AIR SENSOR TUBE INSTALLATION
Step 15 — Install Accessories . . . . . . . . . . . . . . . . . 52
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . 52
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the litera-
ture, tags and labels attached to the unit, and other safety precau-
tions that may apply.
Follow all safety codes, including ANSI (American National Stan-
dards Institute) Z223.1. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol
. When you see this symbol on the unit and in in-
structions or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which
will
result in
severe personal injury or death. WARNING signifies hazards
which
could
result in personal injury or death. CAUTION is used
to identify unsafe practices, which
may
result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which
will
result in enhanced installation, reliability,
or operation.
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in death, serious
personal injury and/or property damage.
Disconnect gas piping from unit when pressure testing at pres-
sure greater than 0.5 psig (3450 Pa). Pressures greater than
0.5 psig will cause gas valve damage resulting in hazardous
condition. If gas valve is subjected to pressure greater than
0.5 psig, it must be replaced before use. When pressure testing
field-supplied gas piping at pressures of 0.5 psig or less, a unit
connected to such piping must be isolated by closing the man-
ual gas valve(s).
WeatherExpert
®
48LC*B14-26
Single Package Rooftop Gas Heating/Electric Cooling Unit
with Multi-Zone VAV (Variable Air Volume) Operation
with Puron
®
(R-410A) Refrigerant
Содержание WeatherExpert 48LC B14 Series
Страница 4: ...4 Fig 2 48LC B14 Vertical Airflow ...
Страница 5: ...5 Fig 3 48LC B14 Horizontal Airflow ...
Страница 6: ...6 Fig 4 48LC B14 Back View and Condensate Drain Location ...
Страница 7: ...7 Fig 5 48LC B14 Corner Weights and Clearances ...
Страница 8: ...8 Fig 6 48LC B14 Bottom View ...
Страница 9: ...9 Fig 7 48LC B17 20 Vertical Airflow ...
Страница 10: ...10 Fig 8 48LC B17 20 Horizontal Airflow ...
Страница 11: ...11 Fig 9 48LC B17 20 Back View and Condensate Drain Location ...
Страница 12: ...12 Fig 10 48LC B17 20 Corner Weights and Clearances ...
Страница 13: ...13 Fig 11 48LC B17 20 Bottom View ...
Страница 14: ...14 Fig 12 48LC B24 26 Vertical Airflow ...
Страница 15: ...15 Fig 13 48LC B24 26 Horizontal Airflow ...
Страница 16: ...16 Fig 14 48LC B24 26 Back View and Condensate Drain Location ...
Страница 17: ...17 Fig 15 48LC B24 26 Corner Weights and Clearances ...
Страница 18: ...18 Fig 16 48LC B24 26 Bottom View ...
Страница 21: ...21 Fig 20 48LC B14 Roof Curb Details ...
Страница 22: ...22 Fig 21 48LC B17 20 Roof Curb Details ...
Страница 23: ...23 Fig 22 48LC B24 26 Roof Curb Details ...
Страница 30: ...30 Fig 40 48LC B14 26 VAV RTU Open Control Wiring Diagram ...
Страница 31: ...31 Fig 41 48LC B14 26 Power Wiring Diagram ...
Страница 53: ......