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IM 971-3 • MAVERICK I
4 www.DaikinApplied.com
Mechanical Installation
Mechanical Installation
Major Components
The unit includes a hermetically-sealed refrigerating system
consisting of a scroll compressor, condenser coil, evaporator
coil with capillary tube assembly, circulation air blower,
condenser fan, heat exchanger assembly, gas burner and
control assembly, combustion air motor and fan, and all
necessary internal electrical wiring. The unit’s cooling system
is factory-evacuated, charged and performance tested.
Refrigerant amount and type are indicated on rating plate.
The unit is available in 150,000, 225,000 and 252,000 BTUH
heating input. Cooling capacity is 6.5, 7.5, 8.5, 10 and 12
nominal tons. Units are convertible from bottom supply and
return to side supply and return by relocation of supply and
return air cover panels. The units are weatherized for mounting
outside of the building.
General
WARNING
When a unit is installed so that supply ducts carry air circulated by the unit
to areas outside the space containing the unit, the return air shall also be
handled by duct(s) sealed to the unit casing and terminating outside the
space containing the unit.
Install this unit in accordance with The American National
Standard Z223.1-latest edition manual entitled “National Fuel
Gas Code,” and the requirements or codes of the local utility or
other authority having jurisdiction.
Additional helpful publications available from the “National Fire
Protection Association” are: sNFPA-90A - Installation of Air
Conditioning and Ventilating Systems 1985 or latest edition.
NFPA-90B - Warm Air Heating and Air Conditioning Systems
1984.
These publications are available from:
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Pre-Installation Check-Points
Before attempting any installation, carefully consider the
following points:
1. Structural strength of supporting members (rooftop
installation)
2. Clearances and provision for servicing power supply
and wiring
3. Gas supply and piping
4. Air duct connections and sizing
5. Drain facilities and connections
6. Location for minimum noise and vibration - away from
bedroom windows
Location Considerations
WARNING
This unit may be used to heat the building or structure during construction
if the following installation requirements are met. Installation must comply
with all installation instructions including:
• Proper vent installation
• Furnace operating under thermostatic control
• Return air duct sealed to the furnace
•
Air filters in place
• Set furnace input rate and temperature rise per rating plate marking
•
Means of providing outdoor air required for combustion
• Return air temperature maintained between 55°F (13°C) and 80°F
(27°C)
•
Installation of exhaust and combustion air inlet hoods completed
• Clean furnace, duct work and components upon substantial completion
of the construction process, and verify furnace operating conditions
including ignition, input rate, temperature rise and venting, according to
the instructions.
The metal parts of this unit may be subject to rust or
deterioration in adverse environmental conditions. This
oxidation could shorten the equipment’s useful life. Salt spray,
fog 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.
If the unit is to be installed in an area where contaminants are
likely to be a problem, give special attention to the equipment
location and exposure.
1. Avoid having lawn sprinkler heads spray directly on the
unit cabinet.
2. In coastal areas, locate the unit on the side of the
building away from the waterfront.
3. Shielding by a fence or shrubs may give some
protection.
4. Frequent washing of the cabinet, fan blade and coil
with fresh water will remove most of the salt or other
contaminants that build up on the unit.
5. Regular cleaning and waxing of the cabinet with a good
automobile polish will provide some protection.
6. A good liquid cleaner may be used several times a year
to remove matter that will not wash off with water.
Several different types of protective coatings are offered in
some areas. These coatings may provide some benefit, but the
effectiveness of such coating materials cannot be verified by
the equipment manufacturer.
The best protection is frequent cleaning, maintenance, and
minimal exposure to contaminants .
Summary of Contents for Maverick I MPSA008D
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