Instruction Manual

FAN COIL UNIT
MB, MB-HW
:
Installation, Operation, and Maintenance Instructions
4
FAN COIL UNIT
The installer must adhere strictly to all local and national code requirements
pertaining to the installation of this equipment. All units are designed for
indoor use only, and are agency listed for installation with zero clearance to
combustible materials. This includes the fan coil cabinet, discharge plenum,
and connecting ducts. These units are designed to be installed in either an
upflow or horizontal position.
HORIZONTAL
APPLICATION
The MB and MB-HW fan coil units are factory assembled for horizontal left side
down application without any modification required. To convert to horizontal
right side down, remove horizontal drain pan and A-coil assembly, flip
horizontal drain pan over to right side and reinstall horizontal drain pan and
A-coil into cabinet. Secure forward edge of horizontal drain pan with angle
bracket. The unit should be leveled in such a way that there is slope toward the
condensate drain nipple to assure positive drainage.
VERTICAL
APPLICATION
Fan coil may be set on a platform and secured by screws or nails. Sufficient
space for drain piping is required under the platform.
Sufficient clearance must be provided at the front of the fan coil to allow access
to electrical controls and removal of the motor/ blower assembly for servicing.
This clearance distance should be approximately the same as the depth
dimension of the fan coil unit.
NOTE: • A field-fabricated secondary drain pan, with a drain pipe routed to the
outside of the building, may be required in installations over a finished
living space or in any area that may be damaged by water overflow from
the main drain pan. In some localities local codes may require a secondary
drain pan for any horizontal installation.
• If a condensate overflow shut off switch, that is designed to be installed in
the drain line, is used in place of a secondary drain line then place it in the
primary drain line between the fan coil and the P-trap.
MOUNTING
It is important to ensure that the fan coils are securely mounted and the
structure is sufficient to support the weight of the equipment. All anchors for
mounting the equipment must be placed and sized to ensure a safe and
durable installation.
FAN COIL
CONFIGURATION
The MB fan coil units are supplied with a single water coil and the MB-HW fan
coil units are supplied with a chilled water coil and hot water coil.
WARNING: Hot water can cause scalding. If hot water coil is connected to domestic potable
water a hot water mixing valve can be applied to the system to temper
domestic water draw.