Air Duct System, Condensate Drainage, Elbow

Air Duct System

Air ducts must be installed in accordance with the standards of the National Fire Protection Association “Standard for Installation of Air Conditioning and Ventilation Systems” (NFPA 90A),“Standard for Installation of ResidenceType Warm Air Heating and Air Conditioning Systems” (NFPA 90B), these instructions, and all applicable codes. NFPA publications are avaialable by writing to: National Fire Protection Association, Batterymarch Park, Quincy, ME 02269 or visit www.NFPA.org on the web.

•Design the duct work according to methods described by the Air Conditioning Contractors of America (ACCA).

•The supply duct system, including the number and type of registers, will have much more effect on the performance of the system than any other factor. The duct must be sufﬁ ciently large to conduct an adequate amount of air to each register. See Figure 4 (page 6).

•Duct work should be attached directly to the unit ﬂ anges for horizontal applications.

•If roof curb is installed, the ducts must be attached to the curb hangers, not the unit.

•For highly resistive duct systems it may be necessary to add an additional return air duct and or supply to achieve maximum performance and prevent coil icing and refrigerant ﬂ ood back

Unconditioned Spaces

All duct work passing through unconditioned space must be properly insulated to minimize duct losses and prevent condensation.Use insulation with an outer vapor barrier. Refer to local codes for insulation material requirements.

The heat pump system will not cool or heat the home if air is lost to the outside through leaks in the duct system. Ducts that are collapsed or restricted by foreign objects will also prevent adequate air ﬂow.

Condensate Drainage

A 3/4” condensate ﬁ tting extends out of the side of the unit (Figure 2). The drain trap, shipped in the electrical compartment, must be installed to prevent water from collecting inside the unit.

1.Thread the elbow provided with the unit into the drain connection until hand tight.

2.Connect the condensate tubing onto the ﬁtting, forming a trap near the drain connection.

3.Route the condensate tube from the trap to a suitable drain. NOTE: For proper drainage, make sure the trap is level to the ground and tubing outlet is below trap level.

Elbow

P-Trap

Figure 2. Drain Trap

HEAT PUMP INSTALLATION

Unpacking the Unit

It is recommended that the unit be unpacked at the installation site to minimize damage due to handling.

CAUTION:

Do not tip the unit on its side. Oil may enter the compressor cylinders and cause starting trouble. If unit has been set on its side, restore to upright position and do not run for several hours.Then run unit for a few seconds. Do this three or four times with ﬁve minutes between runs.

1.Remove the bands from around the unit.

2.Unfold the top and bottom cap ﬂ anges.

3.Carefully remove the top cap and tube.

Minimum Clearances

Minimum clearances MUST be maintained from adjacent structures to provide room for proper servicing and air circulation. DO NOT install unit in a conﬁ ned or recessed area that will allow discharge air from the unit to re-circulate into the condenser air inlet, through the coil. See Figure 3 (page 6).

Service Access Clearance:
Blower access panel side	24”
Electrical compartment access panel side ...	12”
Clearance between overhang and
top of unit	72”
Clearance around condenser coil area to
wall or shrubs (excludes duct panel side) ..	12”
Clearances to Combustibles:
Combustible Base (Wood or Class A, B, or C
roof Covering material)	0”
Supply and Return Air Ducts	0”
Duct Connection side	0”