Unit limitations
Table 2: YV28 to YV50 unit limitations
Applied voltage
Outdoor DB
temperature
Unit voltage
Minimum
Maximum
Maximum (°F)
208/230-3-60
187
252
125
460-3-60
432
504
125
575-3-60
540
630
125
Location
Use the following guidelines to select a suitable
location for these units:
•
The unit is designed for outdoor installation
only.
•
Condenser coils must have an unlimited
supply of air. Where a choice of location is
possible, position the unit on either the north
or east side of the building.
•
Suitable for mounting on roof curb.
•
For ground level installation, use a level
concrete slab with a minimum thickness of
4 in. The length and width must be at least
6 in. greater than the unit base rails. Do not
tie the slab to the building foundation.
•
Roof structures must be able to support
the weight of the unit and its options and
accessories. The unit must be installed on a
solid, level roof curb or appropriate angle iron
frame.
Maintain level tolerance to 1/2 in. across the entire
width and length of the unit.
WARNING
Excessive exposure of the furnace to contaminated
combustion air will result in safety and performance
related problems. Typical contaminates include the
following items:
• Permanent wave solution
• Chlorinated waxes and cleaners
• Chlorine based swimming pool chemicals
• Water softening chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (for example, perchloroethylene)
• Printing inks
• Paint removers
• Varnishes
• Hydrochloric acid
• Cements and glues
• Anti static fabric softeners for clothes dryers
• Masonry acid washing materials
Clearances
All units require particular clearances for proper
operation and service. The installer must make
provisions for adequate combustion and ventilation
air in accordance with section 5.3 of Air for
Combustion and Ventilation of the National Fuel Gas
Code, ANSI Z223.1 – latest edition (in the U.S.A.), or
Sections 7.2, 7.3, or 7.4 of Gas Installation Codes,
CSA-B149.1 (in Canada) - latest edition, and/or
applicable provisions of the local building codes. See
the Unit clearances table for the clearances required
for combustible construction, servicing, and proper
unit operation.
Detailed unit clearances are available in the
WARNING
Do not permit overhanging structures or shrubs
to obstruct the condenser air discharge outlet,
combustion air inlet, or vent outlets.
Installation Manual: YORK
®
Sun™ Select YV28 to YV50
12
Johnson Controls Ducted Systems
Содержание Sun Select YV28
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