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©2018 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION
INSTRUCTIONS
VRF SYSTEMS
507453-05
05/2018
THIS MANUAL MUST BE LEFT WITH THE
OWNER FOR FUTURE REFERENCE
Shipping and Packing List
Check the components for shipping damage. If you
fi
nd
any damage, immediately contact the last carrier.
Package 1 of 1 contains the following:
1 - Assembled mode selection box
3 - Insulation sleeves for piping from outdoor unit
1 - 1” X ¾” condensate drain adaptor
1 to 6* -
⅜
” to ¼” adaptors
1 to 6* -
⅝
” to ½” adaptors
1 to 6* - ¼” brass
fl
are nuts
1 to 6* - ½” brass
fl
are nuts
1 to 6* - Gas pipe insulation sleeve(s)
1 to 6* - Liquid pipe insulation sleeves
*Quantity of these items depends on number of refrigerant
piping connection pairs.
Installation
Mode Selection Box
Mode selection boxes V8MSBB01, V8MSBB02, V8MS-
BB03 and V8MSBB04 are used with VRA heat recovery
outdoor units to allow simultaneous heating and cooling in
multiple zones. Mode selection boxes are designed for in-
door installation only.
Mode selection boxes include solenoid valves which control
refrigerant
fl
ow through the individual indoor units so that
unit operation (heating or cooling) matches the comfort re-
quirements being sent by the occupant.
Mode selection boxes are sized to accommodate up to 24
indoor units. See Table 1.
Mode selection boxes are equipped with
fl
ared
fi
ttings for
indoor unit refrigerant piping connections and braze
fi
ttings
for outdoor unit connections.
Refer to the Product Speci
fi
cation bulletin (EHB) for the
proper use of mode selection boxes with matching VRA
heat recovery units, indoor units, branch pipes, line sets
and controls.
V8MSBB04 Shown
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
WARNING
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause property damage,
personal injury or loss of life.
Installation and service must be performed by a li-
censed professional HVAC installer, service agency
or the gas supplier.
Failure to follow safety warnings and these instruc-
tions exactly could result in property damage, dan-
gerous operation, serious injury, or death.
Any additions, changes, or conversions required in
order for the appliance to satisfactorily meet the ap-
plication needs must be made by a licensed profes-
sional HVAC installer (or equivalent) using factory-
specifi ed parts.
Do not use this system if any part has been under
water. A fl ood-damaged appliance is extremely dan-
gerous. Immediately call a licensed professional
HVAC service technician (or equivalent) to inspect
the system and to replace all controls and electrical
parts that have been wet, or to replace the system, if
deemed necessary.
WARNING
The Mode Selection Box is factory
fi
tted with Black
plastic caps over the
fl
are connection points. These
must be replaced with the supplied brass
fl
are nuts.
Under no circumstances can the plastic caps be used
as a permanent seal even when not all ports are used.
A suitable blanking device must be
fi
tted on all unused
ports.
