IM 972-2 • MAVERICK I ROOFTOP SYSTEMS 4
www.DaikinApplied.com
Mechanical Installation
Mechanical Installation
Checking Product Received
IMPORTANT
Check the unit model number, heating size, electrical characteristics, and
accessories to determine if they are correct.
Upon receiving the unit, inspect it for any damage from
shipment. Claims for damage, either shipping or concealed,
should be filed immediately with the shipping company.
Major Components
The unit includes a hermetically-sealed refrigerating system
consisting of a scroll compressor, condenser coil, evaporator
coil with capillary tube assembly, a supply air fan, a condenser
fan, a heat exchanger assembly, gas burner and control
assembly, combustion air motors and fan, and all necessary
internal electrical wiring. The cooling system of these units
is factory-evacuated, charged and performance tested.
Refrigerant amount and type are indicated on rating plate.
The unit is available in 250,000 AND 350,000 BTUH heating
input with nominal cooling capacity of 15 tons. 300,000 and
400,000 BTUH heating inputs are available in nominal cooling
capacity of 20 and 25 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
NOTICE
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: NFPA-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
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
IMPORTANT
Before operating unit, remove compressor shipping supports from the
compressor base. Failure to remove supports will cause noise and vibration.
1. Before attempting any installation, carefully consider the
following points:
a. Structural strength of supporting members (rooftop
installation)
b. Clearances and provision for servicing power
supply and wiring
c. Gas supply and piping
d. Air duct connections and sizing
e. Drain facilities and connections
f. Location for minimum noise and vibration - away
from bedroom windows
Filter Replacement
This unit is provided with 3–18" × 18" × 2" and 3–18" × 24" × 2"
disposable filters. When replacing filters, ensure they are
inserted fully to the back to prevent bypass.
Recommended supplier of this filter is AAF International:
• Part #: 54-42541-01 (18" × 18" × 2")
• Part #: 54-42541-03 (18" × 24" × 2")
Summary of Contents for Maverick I
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