Duct Work, Filters, Supply Duct Connections

Bard I48H1D, I60H1, I42H1D, I36H1D Duct Work, Filters, Supply Duct Connections, Filter Location

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 airflow 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 I-TEC series heat pump has provision to attach a supply air duct to the top of the unit. Duct connection size is 20 inches x 24 inches. The flanges are shipped flat and must be bent upward using sheet metal flanging pliers. The duct work is field supplied. See Figure 8 for suggested attachment method.

Make sure to seal the slots in the bend-up flange at the time of securing your ductwork to the flange. This can be accomplished with either foil tape or caulk. Failing to do so may cause air leakage/whistling of air.

FIGURE 8

SUPPLY DUCT CONNECTIONS

20"	SUPPLY DUCT AND
24"	FASTENERS TO BE
	FASTENERS TO BE

FIELD SUPPLIED

BEND THE PROVIDED

SUPPLY FRAME FLANGES

UP FOR DUCT INSTALLATION

afloor mounted install (9'-9" with IRP3 riser & 10'-0" with IRP6 riser). The ICX10 extends 28" above the unit for a total height of 10'-2" for a floor mounted install (10'-5" with IRP3 riser & 10'-8" with IRP6 riser).

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 airflow up to the maximum ESP shown in Table 1A. 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 2-inch throw away filters (24 x 30) and two 1- inch throw away filters (12 x 20) are supplied with each unit. The 2-inch filters slide into brackets on both sides for the return air openings. The 1-inch filters are in the cabinet doors for the vent (room air) exhaust. If a CRV or ERV vent option is used, there are two (2) additional ½" (8 x 17) washable filters included with that option. See Figure 9 for specific locations. The filters are serviced from the inside of the building by opening the cabinet doors, and do not require any tools to access.

FIGURE 9

FILTER LOCATION

	24" X 30" X 2"
	FILTERS
É	INDOOR	É
	BLOWER
	ACCESS

MIS-2959

NOTE: Unit cabinet, supply air duct and duct free plenum are approved for “0” clearance to combustible material.

The I-TEC series heat pumps are designed for use with free return (non-ducted) and either duct free with the use of IPBDF Series Plenum Box (8" or 12") or a duct supply air system.

The IPBDF Plenum Box mounts on top of the unit and has both vertically and horizontally adjustable louvers on the front discharge grille.

When used with a ducted supply, an ICX9 or ICX10 Cabinet Extension may be used to conceal the ductwork above the unit to the ceiling. The ICX9 extends 20" above the unit for a total height of 9'-6" for

	COMPRESSOR
	ACCESS
	ACCESS TO
	WASHABLE
	FILTERS
É	É

VENT

OPTION

ACCESS

12" X 20" X 1"

FILTERS

Manual	2100-549G
Page	17 of 59