Bard QC501 Manuel D’Utilisation
Manual 2100-416
Page 9
Page 9
DUCT WORK
Any heat pump is more critical of proper operating
charge and an adequate duct system than a straight air
conditioning unit. All duct work must be properly
sized for the design air flow requirement of the
equipment. Air Conditioning Contractors of America
(ACCA) is an excellent guide to proper sizing. All duct
work or portions thereof not in the conditioned space
should be properly insulated in order to both conserve
energy and prevent condensation or moisture damage.
When duct runs through unheated spaces, it should be
insulated with a minimum of one inch of insulation.
Use insulation with a vapor barrier on the outside of the
insulation. Flexible joints should be used to connect
the duct work to the equipment in order to keep the
noise transmission to a minimum.
charge and an adequate duct system than a straight air
conditioning unit. All duct work must be properly
sized for the design air flow requirement of the
equipment. Air Conditioning Contractors of America
(ACCA) is an excellent guide to proper sizing. All duct
work or portions thereof not in the conditioned space
should be properly insulated in order to both conserve
energy and prevent condensation or moisture damage.
When duct runs through unheated spaces, it should be
insulated with a minimum of one inch of insulation.
Use insulation with a vapor barrier on the outside of the
insulation. Flexible joints should be used to connect
the duct work to the equipment in order to keep the
noise transmission to a minimum.
The QT
EC
series unit has provision to attach a supply
air duct to the top of the unit. Duct connection size is
12 inches x 20 inches. The duct work is field supplied
and must be attached in a manner to allow for ease of
removal when it becomes necessary to slide the unit out
from the wall for service. See Figure 7 for suggested
attachment method.
12 inches x 20 inches. The duct work is field supplied
and must be attached in a manner to allow for ease of
removal when it becomes necessary to slide the unit out
from the wall for service. See Figure 7 for suggested
attachment method.
NOTE: Unit cabinet, supply air duct and free blow
plenum are approved for “0” clearance to
combustible material.
combustible material.
The QT
EC
series units are designed for use with free
return (non-ducted) and either free blow with the use of
QPB Plenum Box or a duct supply air system.
QPB Plenum Box or a duct supply air system.
The QPB Plenum Box mounts on top of the unit and
has both vertically and horizontally adjustable louvers
on the front discharge grille. See Optional Accessories,
Page 18, for the correct Plenum Box model number.
has both vertically and horizontally adjustable louvers
on the front discharge grille. See Optional Accessories,
Page 18, for the correct Plenum Box model number.
FIGURE 7
SUPPLY DUCT CONNECTIONS
SUPPLY DUCT
TO BE FIELD
SUPPLIED
TO BE FIELD
SUPPLIED
ATTACHMENT
SCREWS TO BE
FIELD SUPPLIED
SCREWS TO BE
FIELD SUPPLIED
DUCT FLANGE
PROVIDED WITH UNIT
PROVIDED WITH UNIT
ROOM SIDE
OF QC UNIT
OF QC UNIT
MIS-978
When used with a ducted supply, a QCX Cabinet
Extension can be used to conceal the duct work above
the unit to the ceiling. This extends 20” above the unit
for a total height above the floor of 10’-7/8”. See
Optional Accessories, Page 18 for the correct Cabinet
Extension model number. The unit is equipped with a
variable speed indoor blower motor which increases in
speed with an increase in duct static pressure. The unit
will therefore deliver proper rated air flow up to the
Maximum ESP shown in Table 5. However, for quiet
operation of the air system, the duct static should be
kept as low as practical, within the guidelines of good
duct design.
Extension can be used to conceal the duct work above
the unit to the ceiling. This extends 20” above the unit
for a total height above the floor of 10’-7/8”. See
Optional Accessories, Page 18 for the correct Cabinet
Extension model number. The unit is equipped with a
variable speed indoor blower motor which increases in
speed with an increase in duct static pressure. The unit
will therefore deliver proper rated air flow up to the
Maximum ESP shown in Table 5. However, for quiet
operation of the air system, the duct static should be
kept as low as practical, within the guidelines of good
duct design.
FILTERS
Two 1 inch throw away filters are supplied with each
unit. The filters fit into a fixed rack.
unit. The filters fit into a fixed rack.
The filters are serviced from the inside of the building .
To gain access to the filters release the latch on the
circuit breaker door and one 1/4 turn fastener near the
bottom of the door. This door is hinged on the left so it
will swing open.
To gain access to the filters release the latch on the
circuit breaker door and one 1/4 turn fastener near the
bottom of the door. This door is hinged on the left so it
will swing open.
The internal filter brackets are adjustable to
accommodate 2 inch filters. The tabs for the 1 inch
filters must be bent down to allow the 2 inch filters to
slide in place.
accommodate 2 inch filters. The tabs for the 1 inch
filters must be bent down to allow the 2 inch filters to
slide in place.
FIGURE 8
FILTER LOCATION
RETURN AIR
GRILLE
GRILLE
FILTERS