Installation Instructions - Haier HC18D1VAR Service Manual

Air leakage of only 3% in a return duct can cause a 5% loss in system capacity. 3% leakage on a three
ton system is only 30 CFM. Two or three unsealed joints can cause a leak of this size. Sealing the return
and supply ducts result in full system capacity and lower operating costs.
Effective duct insulation is essential to prevent loss of capacity and sweating ducts in the cooling mode.
Duct systems installed in the conditioned space can be left uninsulated , but a dense 1/2" fiberglass duct
liner reduces blower and air noises, and prevents sweating ducts when humidity levels are high.
Supply and return duct systems in attics and crawl spaces require a minimum 1" of dense duct liner or 2"
fiberglass wrap with a sealed vapor barrier. A leaky vapor barrier results in duct sweating, causing wet
insulation does not insulated.
Heat transfer through poorly insulated systems can result in over 50%
ducts also results in r usting that leads to premature duct failure. Carefully follow the industry practices to
insure a well designed duct system.
Air supply diffusers must be selected and located carefully. They must be sized and positioned to deliver
treated air along the perimeter of the space. If they are too small for their intended air flow, they can be
noisy. If they are not located properly, they can cause drafts in the rooms. Return air grilles must be
properly sized to carry air back to the blower. If they are too small they also cause noise. The installers
should balance the air distribution system to ensure proper air flow to all rooms in the home. This
ensures a comfortable living space.

7. INSTALLATION INSTRUCTIONS

! WARNING
These instructions are intended as an aid to qualified, service and instalolation personnel for proper installation
adjustment and operation of this unit. Read these instructions thoroughly before attempting installation or
service this equipment. Failure to follow these instructions may result in improper installation,
service or maintenance and could possibly result in fire, electrical shock, property damage.
.
This product is designed and manufactured to permit installation in accordance with National Codes. It is
the installer's responsibility to install the product in accordance with National Codes and/or
prevailing local codes and regulations. The manufacturer assumes no responsibility for equipment
installed in violation of any codes or regulations.
The United States Environmental Protection Agency (EPA) has issued various regulations
regarding the introduction and disposal of refrigerants from this unit. Failure to follow these regulations
may harm the environment and can lead to the imposition of substantial fines. Because these regulations
are subject to revision any repair on this unit should be done by a certified technician.
The manufacturer's warranty does not cover any damage failure caused by the air conditioning system.
You should be aware that the use of unauthorized components, accessories or devices may
adversely affect the operation of the air conditioner and may also endanger life and property.
The manufacturer disclaims any responsibility
components, accessories or devices.
If the service panel is not attached securely, it could result in a fire or an electric shock due to dust,
water, etc.
7.1 OUTDOOR UNIT INSPECTION
This product has been inspected at the factory and released for shipment without known damage. Inspect
exterior of carton for evidence of rough handling in shipment. Unpack carefully. If damage is found,
report immediately to you distributor or the transportation agency.
7.2 EQUIPMENT PROTECTION FROM ENVIRONMENT
The metal parts of the unit may be subject to rust or corrosion in adverse environmental conditions. This
oxidation could shorten the unit life. Salt spray or mist in seacoast areas, sulphur or chlorine from lawn
watering systems and various chemical contaminants from industries such as paper mills and petroleum
refineries are especially corrosive.
Central Air Conditioner
for loss or injury due to the use of such unauthorized
Attach the service panel to the outdoor unit after to prevent.
Model: Cooling Only, 13SEER units
loss in operating capacity. Sweating