McQuay Maverick I IM 865 MPS006AY, Руководство по установке и обслуживанию

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IM 865 11
Ductwork
Ductwork should be fabricated by the installing contractor in
accordance with local codes and NFPA90A. Industry manuals
may be used as a guide when sizing and designing the duct
system - contact Air Conditioning Contractors of America,
1513 16th St. N.W., Washington, D.C. 20036.
The unit should be placed as close to the space to be air condi-
tioned as possible allowing clearance dimensions as indicated.
Ducts should be run as directly as possible to supply and
return outlets. Use of non-flammable waterproof flexible con-
nectors on both supply and return connections at the unit to
reduce noise transmission is recommended.
It is preferable to install the unit on the roof of the structure if
the registers or diffusers are located on the wall or in the ceil-
ing. A slab installation could be considered when the registers
are low on a wall or in the floor.
On ductwork exposed to outside air conditions of temperature
and humidity, use a minimum of 2" of insulation and a vapor
barrier. Distribution system in attic, furred space or crawl
space should be insulated with at least 2" of insulation with
vapor barrier. One-half to 1" thickness of insulation is usually
sufficient for ductwork inside the air conditioned space.
Balancing dampers should be provided for each branch duct in
the supply system. Ductwork should be properly supported
from the structure.
When installing ductwork, consider the following items:
1 Noncombustible flexible connectors should be used
between ductwork and unit to reduce noise and vibra-
tion transmission into the ductwork.
2 When auxiliary heaters are installed, use noncom-
bustible flexible connectors and clearance to com-
bustible material of 0" for the first 3 feet of discharge
duct.
Filters
This unit is provided with 4 - 16" x 16" x 2" disposable filters.
When replacing filters, ensure they are inserted fully to the
back to prevent bypass.
Conversion Procedure
Downflow to Horizontal
1 Remove the screws and covers from the outside of the
supply and return sections.
2 Install the covers in the bottom supply and return open-
ings with the painted side up. See Figure 10. Use the
existing gasket to seal the covers.
3 Secure the supply cover to the base of the unit with 1
screw, engaging prepunched tab in unit base.
4 Secure the return cover to the base of the unit with
screws, engaging prepunched holes in the unit base.
Condensate Drain
The condensate drain connection of the evaporator is 3/4"
nominal female pipe thread.
IMPORTANT: Install a conden-
sate trap to ensure proper condensate drainage. See Figure 11.
Figure 9: Flat Rooftop Installation, Attic or Drop Ceiling
Distribution System. Mounted on Roofcurb. Curb Must Be
Level.
Figure 10: Cover Gasket Detail
ILL I310
ILL I631
Do not, under any circumstances, connect return ductwork
to any other heat producing device such as a fireplace
insert, stove, etc. Unauthorized use of such devices may
result in fire, carbon monoxide poisoning, explosion, proper-
ty damage, severe personal injury or death.
▲ ▲
DANGER
!
Figure 11: Condensate Drain