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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. 04-53500001-01 Printed in U.S.A. Form 50BV-3SI Pg 1 10-08 Replaces: 50BV-2SI
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . .1,2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . 2
Constant Volume (CV) Units. . . . . . . . . . . . . . . . . . . . . . 2
Variable Air Volume (VAV) Units . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Step 1 — Complete Pre-Installation Checks . . . . . . 3
• EXAMINE THE UNIT
• UNIT STORAGE
• MODULAR UNITS
Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 3
• REMOVE PACKAGING
• UNIT LOCATION
• UNIT PLACEMENT
• ACOUSTICAL CONSIDERATIONS
• ASSEMBLING MODULAR UNITS
Step 3 — Install Ductwork. . . . . . . . . . . . . . . . . . . . . . . 19
• DUCT STATIC PRESSURE PROBE AND TUBING
(VAV Onl y)
• DUCT HIGH-STATIC (DHS) LIMIT SWITCH (VAV Only)
Step 4 — Make Piping Connections . . . . . . . . . . . . . 21
• CONDENSER WATER PIPING (Water-Cooled Only)
• EVAPORATOR CONDENSATE DRAIN
• HOT WATER HEATING COIL (Optional)
• WATER ECONOMIZER (Optional)
• REMOTE REFRIGERANT PIPING
(Remote Air-Cooled Only)
Step 5 — Complete Electrical Connections. . . . . . 24
• POWER WIRING
• CONTROL WIRING (CV Only)
• REMOTE CONDENSER FAN CONTACTOR WIRING
• CONTROL WIRING (VAV Only)
• SUPPLY AIR TEMPERATURE SENSOR (SAT)
• SMOKE DETECTOR/FIRE ALARM SHUTDOWN (FSD)
• ALARM (ALARM) AND WARNING (WARN) OUTPUTS
• REMOTE OCCUPANCY (ROCC)
• RETURN AIR TEMPERATURE SENSOR (RAS)
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-48
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
• CRANKCASE HEATERS
• CONFIRM THE INPUT POWER PHASE SEQUENCE
• INTERNAL WIRING
• RETURN-AIR FILTERS
• COMPRESSOR MOUNTING
• REFRIGERANT SERVICE PORTS
CV Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
• EVAPORATOR FAN
•COOLING
• HEATING (Heat Pump Units Only)
VAV Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
• PERFORM AUTOMATIC RUN TEST
•CHECK VFD
• POWER UP LID DISPLAY
Page
• LOG ON TO THE LID DISPLAY
• CHANGE THE DEFAULT PASSWORD
• SET THE CLOCK
• CONFIGURE SCHEDULES
• PROGRAM SET POINTS
• CHECK SYSTEM PARAMETERS
• DISPLAY ALARM HISTORY
• CONFIGURE THE CUSTOM PROGRAMMING
SELECTIONS
• SET CONTROLLER ADDRESS
• LOG OFF FROM THE CONTROLLER
Sequence of Operation (CV Only) . . . . . . . . . . . . . . . 47
• WATER ECONOMIZER COOLING
Sequence of Operation (VAV Only) . . . . . . . . . . . . . . 48
• SUPPLY FAN
• COMPRESSOR COOLING
• WATER ECONOMIZER COOLING
• COOLING RESET
Diagnostic Features (CV Only) . . . . . . . . . . . . . . . . . . 48
VAV Control and VFD Diagnostics. . . . . . . . . . . . . . . 48
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Fan Motor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . 49
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-51
Cleaning Unit Exterior. . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Coil Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Condensate Drains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Water-Cooled Condensers . . . . . . . . . . . . . . . . . . . . . . 49
• GRAVITY FLOW METHOD
• FORCED CIRCULATION METHOD
Fan Motor Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Fan Bearing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . 50
Fan Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
•ALIGNMENT
Evaporator Fan Performance Adjustment . . . . . . . 51
• BELT TENSION ADJUSTMENT
Charging the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
• REMOTE AIR-COOLED UNITS
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 51-65
Forcing and Clearing an Input or Output
(VAV only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . .CL-1, CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning
components and equipment can be dangerous. Only trained,
qualified installers and service mechanics should install, start-
up, and service this equipment.
When working on the equipment, observe precautions in
the literature and on tags, stickers, and labels attached to the
OMNIZONE™
50BV020-064
Water-Cooled and Remote Air-Cooled
Indoor Self-Contained Systems and
Water-Cooled Heat Pumps