
102777-YIM-E-0206
Unitary Products Group
13
DUCTWORK
Ductwork should be designed and sized according to the
methods in Manual Q of the Air Conditioning Contractors of
America (ACCA).
A closed return duct system should be used. This will not pre-
clude use of economizers or outdoor fresh air intake. The
supply and return air duct connections at the unit should be
made with flexible joints to minimize noise.
When the unit is equipped with power exhaust fans or return
air fan the return duct should have a 90 elbow before opening
to the building space to abate noise.
The supply and return air duct systems should be designed
for the CFM and static pressure requirements of the job. They
should NOT be sized to match the dimensions of the duct
connections on the unit.
If the unit is equipped with hot water or steam heat then the
supply air direction will be down only.
AIR HOODS FOR FIXED OUTSIDE AIR
(UNITS WITHOUT ECONOMIZER)
These hoods are factory installed. The dampers may be
adjusted by loosening the thumb screw, turning the lever to
the desired position, and retightening the thumb screw.
AIR HOODS FOR ECONOMIZER
There are (3) economizer outside air intake hoods provided
with the unit. The hood on the end of the unit is factory
mounted. The (2) front and rear hoods are made operational
per the following instructions.
Remove the screws holding the economizer hood shipping
covers in place. Discard covers.
Rotate the hoods out (each hood is hinged in the lower cor-
ner). Secure the hoods with screws along the top and sides.
Apply a bead of RTV sealer along the edge of both hoods
and each pivot joint to prevent water leakage.
Seal any unused screw holes with RTV or by replacing the
screw.
AIR HOODS FOR EXHAUST AIR
When furnished, these hoods and dampers are factory
installed.
CONDENSATE DRAIN
There is one condensate drain connection. Trap the connec-
tion per Figure 4. The trap and drain lines should be pro-
tected from freezing.
Plumbing must conform to local codes. Use a sealing com-
pound on male pipe threads. Install condensate drain lines
from the 1-1/2 inch NPT female connections on the unit to an
open drain.
(GAS HEATING OPERATION)
Excessive exposure to contaminated combustion
air will result in safety and performance related
problems. To maintain combustion air quality, the
recommended source of combustion air is the out-
door air supply.
The outdoor air supplied for combustion should be
free from contaminants due to chemical exposure
that may be present from the following sources:
•
Commercial buildings
•
Indoor pools
•
Laundry rooms
•
Hobby or craft rooms
•
Chemical storage areas
The following substances should be avoided to
maintain outdoor combustion air quality:
•
Permanent wave solutions
•
Chlorinated waxes and cleaners
•
Chlorine based swimming pool cleaners
•
Water softening chemicals
•
De-icing salts or chemicals
•
Carbon tetrachloride
•
Halogen type refrigerants
•
Cleaning solvents (such as perchloroethylene)
•
Printing inks, paint removers, varnishes, etc.
•
Hydrochloric acid
•
Cements and glues
•
Antistatic fabric softeners for clothes dryers
•
Masonry acid washing materials
Содержание MILLENNIUM Y22
Страница 47: ...102777 YIM E 0206 Unitary Products Group 47 FIGURE 20 ALTITUDE TEMPERATURE CONVERSION FACTOR ...
Страница 50: ...102777 YIM E 0206 50 Unitary Products Group FIGURE 21 FAN PERFORMANCE 25 TON ...
Страница 53: ...102777 YIM E 0206 Unitary Products Group 53 FIGURE 22 FAN PERFORMANCE 30 TON ...
Страница 56: ...102777 YIM E 0206 56 Unitary Products Group FIGURE 23 FAN PERFORMANCE 40 TON ...
Страница 62: ...102777 YIM E 0206 62 Unitary Products Group FIGURE 25 POWER EXHAUST TWO FORWARD CURVED FANS 30 40 TONS ...
Страница 126: ...102777 YIM E 0206 126 Unitary Products Group FIGURE 52 TYPICAL CONTROL WIRING ...
Страница 127: ...102777 YIM E 0206 Unitary Products Group 127 FIGURE 53 LEGEND ...
Страница 128: ...102777 YIM E 0206 128 Unitary Products Group FIGURE 54 TYPICAL 25 TON POWER WIRING ...
Страница 129: ...102777 YIM E 0206 Unitary Products Group 129 FIGURE 55 TYPICAL 30 40 TON POWER WIRING ...
Страница 130: ...102777 YIM E 0206 130 Unitary Products Group FIGURE 56 TYPICAL GAS HEAT WIRING ...
Страница 134: ...102777 YIM E 0206 134 Unitary Products Group FIGURE 58 25 TON CHARGING CURVE ...
Страница 138: ...102777 YIM E 0206 138 Unitary Products Group FIGURE 62 PRESSURE DROP DRY EVAPORATOR COIL VS SUPPLY AIR CFM 30 40 TON ...
Страница 139: ...102777 YIM E 0206 Unitary Products Group 139 ...