2
TABLE OF CONTENTS
Important Safety Information ....................................2
Requirements & Codes ..............................................3
General Information ...................................................4
Before You Install this Unit .........................................4
Locating the Air Handler ............................................4
Minimum Clearances .................................................4
Operation of Air Handler During Construction ...........4
Installation in a Garage .............................................5
Plenums & Air Ducts .................................................5
Unconditioned Spaces ...........................................5
Air Filters ................................................................5
Acoustical Duct Work .............................................5
Air Handler Installation ..............................................6
Packaging Removal ...................................................6
Mounting Applications ...............................................6
Upflow Installations ...................................................6
Downflow Installations ...............................................6
Horizontal Installations ..............................................7
Horizontal Left Installations ....................................7
Horizontal Right Installations .................................7
Refrigerant Line Connections ....................................8
Connecting the Linesets ........................................9
Condensate Drainage ..............................................9
Electrical Connections ...............................................9
Pre-Electrical Checklist ...........................................10
Line Voltage .............................................................10
Grounding................................................................10
Thermostat Connections .........................................10
Control Board ..........................................................10
Twinning ...............................................................10
Heater Kits...............................................................10
Electronic Air Cleaner..............................................10
Startup & Adjustments ............................................12
Before You Start the Unit .........................................12
Refrigerant Charging ...............................................12
Air Circulation ..........................................................12
Running the Blower Continuously ........................12
Turning the Blower Off..........................................12
System Cooling ....................................................12
System Heating ....................................................12
Blower Settings .......................................................13
Dehumidification ......................................................13
Unit Maintenance ......................................................13
Troubleshooting ........................................................13
Figures & Tables .......................................................14
Table 3. B4BM Physical Dimensions ....................14
Figure 9. Air Handler Components .......................15
Figure 10. X13 Motor Control Board ....................16
Figure 11. EXV Control Board ..............................16
Figure 12. B4VM-E Wiring Diagram .....................17
Installation / Performance Checklist .......................20
IMPORTANT SAFETY INFORMATION
INSTALLER: Please read all instructions before servicing
this equipment. Pay attention to all safety warnings and
any other special notes highlighted in the manual. Safety
markings are used frequently throughout this manual to
designate a degree or level of seriousness and should not
be ignored. WARNING indicates a potentially hazardous
situation that if not avoided, could result in personal injury
or death. CAUTION indicates a potentially hazardous
situation that if not avoided, may result in minor or moderate
injury or property damage.
WARNING:
B4VM-E Series Air Handlers leave the factory
with a nitrogen holding charge. Use caution
when preparing coils for field connections.
If repairs make it necessary for evacuation
and charging, it should only be attempted
by qualified, trained personnel thoroughly
familiar with this equipment. Some local codes
require licensed installation service personnel
to service this type of equipment. Under no
circumstances should the equipment owner
attempt to install and/or service this equipment.
Failure to comply with this warning could result
in equipment damage, personal injury, or death.
NITROGEN
HEALTH
FLAMMABILITY
REACTIVITY
0 Minimal Hazard
1 Slight Hazard
1
0
0
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical power
to air handler.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
