York DM 300 - Manual

262259-YTG-E-1008
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
TECHNICAL GUIDE
SINGLE PACKAGE GAS/ELECTRIC UNITS
AND SINGLE PACKAGE AIR
CONDITIONERS
DM 180, 240 & 300
15, 20 & 25 NOMINAL TONS
®
DESCRIPTION
YORK Sunline 2000™ units are convertible single package
high efficiency rooftops. All models have independent dual
refrigerant circuits for efficient part load operation. Although
the units are primarily designed for curb mounting on a roof,
they can also be slab-mounted at ground level or set on steel
beams above a finished roof.
All units include:
• Powder Paint finish that meets ASTM-B-117 1000 hour
salt spray standards
• Two-stage cooling provided by dual independent
refrigeration circuits with expansion valves, filter-driers,
high and low pressure/loss of charge switches and
freezestats
• Scroll compressors (25T model only)
• Two-stage heating provided by dual independent heat
exchangers with aluminized steel tubes, redundant gas
valves, spark ignition with induced draft logic
• Permanently lubricated motors
• Bottom or side air discharge configuration capability
(field convertible)
• Belt drive blower motor with high static drive option
• Constant supply air volume (CV) with optional variable
air volume (VAV)
• Manufactured under the quality standards of ISO9001
• Simplicity® Control Board
• Zero-25% fixed air damper with hood
• Copper tube/aluminum fin coils
• Hinged filter access and tool free latched doors optional
• Hinged tool free blower, blower motor, filters and electri-
cal panel access optional
• Rigging holes in base rails for lifting
• Single point power connection
• Complete factory package - tested, charged and wired
• CSA agency approvals on all units
WARRANTY
• One-year parts warranty
• A Five-year parts warranty on the compressors and
electric heat elements
• Ten-year parts warranty on the gas-fired heat
exchangers