Daikin DP14CM Installation Manual

5
CAUTION
T
O AVOID POSSIBLE PERSONAL INJURY, A SAFE, FLAT SURFACE FOR SERVICE
PERSONNEL SHOULD BE PROVIDED.
IMPORTANT: If using bottom discharge with roof curb, duct work
should be attached to the curb prior to installing the unit.
Lower unit carefully onto roof mounting curb. While rigging unit,
center of gravity will cause condenser end to be lower than supply
air end.
Rigging
CIRCULATING AIR AND FILTERS
AIRFLOW CONVERSION
Units can easily be converted from horizontal to down-discharge
airflow delivery. In down-discharge or high static installations,
the installer should measure the total external static and review
the blower performance charts before performing the installa-
tion. In some installations it will be necessary to change the
blower speed to provide proper air flow.
Horizontal Air Flow (Applies to 3 phase models)
Single phase models are shipped without horizontal duct covers. If
needed, these kits may be ordered through Daikin’s Service Parts
department.
Remove these covers
for horizontal duct
applications
Remove these panels
for downflow duct
applications
Supply
Return
Duct Cover Installation
Down Discharge Applications
Cut insulation around bottom openings and remove panels from
the bottom of the unit, saving the screws holding the panels in
place.
NOTE: Single phase models require installation of horizontal duct kit
#20464501NGK (medium chassis) and #20464502NGK (large chassis).
DUCT WORK
Duct systems and register sizes must be properly designed for the
C.F.M. and external static pressure rating of the unit. Duct work
should be designed in accordance with the recommended meth-
ods of Air Conditioning Contractors of America Manual D (Resi-
dential) or Manual Q (Commercial). All ductwork exposed to the
outdoors must include a weatherproof barrier and adequate in-
sulation.
A duct system should be installed in accordance with Standards of
the National Board of Fire Underwriters for the Installation of Air
Conditioning, Warm Air Heating and Ventilating Systems. Pam-
phlets No. 90A and 90B.
The supply duct from the unit through a wall may be installed without
clearance. However, minimum unit clearances as shown in the appendix
must be maintained. The supply duct should be provided with an access
panel large enough to inspect the air chamber downstream of the heat
exchanger. A cover should be tightly attached to prevent air leaks.
For duct flange dimensions on the unit refer to the Unit Dimension illus-
tration in the appendix.
For down-discharge applications, the ductwork should be attached
to the roof curb prior to installing the unit. Duct work dimensions
are shown in the roof curb installation manual.
If desired, supply and return duct connections to the unit may be
made with flexible connections to reduce possible unit operating
sound transmission.
FILTERS
CAUTION
T
O PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT
BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR
FILTER INSTALLED IN THE RETURN AIR SYSTEM.
Filters are not provided with unit and must be supplied and exter-
nally installed in the return duct system by the installer. An op-
tional factory approved internal filter rack may also be used. A
field-installed filter grille is recommended for easy and conve-
nient access to the filters for periodic inspection and cleaning.