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292447-YIM-A-0507
Unitary Products Group 3
Wear safety glasses and work gloves. Use quenching cloth and
have a fire extinguisher available during brazing operations.
Inspection
As soon as a unit is received, it should be inspected for possible
damage during transit. If damage is evident, the extent of the
damage should be noted on the carrier’s freight bill. A separate
request for inspection by the carrier’s agent should be made in
writing.
Reference
Additional information is available in the following reference
forms:
• Technical Guide - ZR078-150, 246824
• General Installation - ZR078-150, 292447
• Pre-start & Post-start Check List
• Economizer Accessory -
Downflow Factory Installed
Downflow Field Installed
Horizontal Field Installed
• Motorized Outdoor Air Damper
• Manual Outdoor Air Damper (0-100%)
• Manual Outdoor Air Damper (0-35%)
• Gas Heat Propane Conversion Kit
• Gas Heat High Altitude Kit (Natural Gas)
• Gas Heat High Altitude Kit (Propane)
• –60°F Gas Heat Kit
• Electric Heater Accessory 50” cabinet
• Electric Heater Accessory 42” cabinet
Renewal Parts
Contact your local York
®
parts distribution center for authorized
replacement parts.
Approvals
Design certified by CSA as follows:
1. For use as a cooling only unit, cooling unit with
supplemental electric heat or a forced air furnace.
2. For outdoor installation only.
3. For installation on combustible material and may be
installed directly on combustible flooring or, in the U.S., on
wood flooring or Class A, Class B or Class C roof covering
materials.
4. For use with natural gas (convertible to LP with kit).
This product must be installed in strict compliance with
the enclosed installation instructions and any applicable
local, state and national codes including, but not limited
to, building, electrical, and mechanical codes.
The furnace and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing at pressures in excess of 1/2 PSIG.
Pressures greater than 1/2 PSIG will cause gas valve
damage resulting in a hazardous condition. If it is
subjected to a pressure greater than 1/2 PSIG, the gas
valve must be replaced.
The furnace must be isolated from the gas supply piping
system by closing its individual manual shut-off valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 PSIG
This product must be installed in strict compliance with
the enclosed installation instructions and any applicable
local, state, and national codes including, but not limited
to, building, electrical, and mechanical codes.
Improper installation may create a condition where the
operation of the product could cause personal injury or
property damage.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.