York d2cg service manual

All piping, refrigerant charge, and electrical wiring is factory-installed and tested. The units require only electric power, gas piping and duct connections at the point of installation.

The gas-fired heaters have aluminized steel tubular heat exchangers and spark ignition with intermittent pilot. This appliance is not to be used for temporary heating of buildings or structures under construction. As soon as a unit is received, it should be inspected for possible damage during transit. Refer to Form Additional information on the design, installation, operation and service of this equipment is available in the following reference forms:.

Natural Gas. Refer to Parts Manual for complete listing of replacement parts on this equipment. All forms referenced in this instruction may be ordered from:. All models are available with five different outdoor air.

Power Exhaust. A fixed outdoor air intake assembly is shipped in the return. The assembly. With bottom duct connections, the. With horizontal ductwork, it. Previous Page. Next Page. Sunline ultra single package air-cooled air conditioners 3, 4 and 5 nominal ton Single package air conditioners and single package electric units 45 pages. Page 2 All supply air blowers are equipped with a belt drive that can be adjusted to meet the exact requirements of the job. All compressors include internal pressure relief.

Page 4 also includes a 1-phase motor to replace the unit's standard 3-phase condenser fan motor. Page 14 B Unitary Products Group Units shall have minimum EER ratings of 8. Page 16 Evaporator and Condenser coils shall be of the direct expansion, draw-thru, design. Condenser coils shall be protected with factory installed coil guards 3. Refrigerant Circuit and Refrigerant Safety Compo- nents shall include: Balance-port thermostatic expansion valve with independent circuit feed system.

CAUTION: On gas heating units, an adhesive backed label is provided over the outside of the combustion air inlet opening to prevent moisture from entering the unit w hich could cause damage to electr ical components. Allow this closure label to remain in place until the combustion air hood is to be installed. All units require certain clearances for proper operation and service. Installer must make provisions for adequate combustion and ventilation air in accordance with Section 5.

Refer to Dimensions and Clearances table for the clearances required for combustible construction, servicing, and proper unit operation. WARNING: Do not permit overhanging structures or shrubs to obstruct outdoor air discharge outlet, combustion air inlet or vent outlets.

A closed return duct system shall be used. This shall not preclude 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. The supply and return air duct systems should be designed for the CFM and static requirements of the job. They should NOT be sized to match the dimensions of the duct connections on the unit.

DO NOT insert screws through casing. Refer to the Dimensions and Clearances figure for information concerning side and bottom supply and return air duct openings. It is recommended that, in Canada, the outlet duct on gas heating units be provided with a removable access panel.

It is recommended that this opening be accessible when the unit is installed in service, and of a size such that smoke or reflected light may be observed inside the casing to indicate the presence of leaks in the heat exchanger.

The cover should be attached in a manner adequate to prevent leakage. This damper is shipped inside the return air compartment on units that are not provided with an economizer or a motorized damper option. It is completely assembled and ready for installation. A damper baffle inside of the hood is adjustable to provide variable amounts of outdoor air intake. Gasketing and mounting screws are provided in a parts bag attached to the hood assembly. Apply gasketing to the three flange surfaces on the hood prior to installing the hood.

Adjusting the damper to the desired air flow may be done before mounting the hood into position or after installation by removing the front hood panel or the screen on the bottom of the hood. On units with bottom return air applications, install the damper assembly over the opening in the side return air access panel. Remove and discard the opening cover and the covering over the hood mounting holes used for shipping before installing.

Secure with the screws provided. On units with side return air applications, install the damper assembly on the return air ductwork as close to the unit as possible. Cut an opening 16" high by 18" wide in the ductwork to accommodate the damper. CAUTION: If outdoor air intake will not be required on units with bottom return air applications, the damper assembly should still be mounted on the side return air access panel, per the instructions above, to insure moisture is not drawn into the unit during operation.

The covering over the mounting holes only need be removed. Do not remove the opening cover. Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install a condensate drain line from the 1" NPT female connection on the unit to an open drain. Units are shipped with compressor mountings factory-adjusted and ready for operation. Filters must always be installed ahead of the evaporator coil and must be kept clean or replaced with same size and type.

Dirty filters will reduce the capacity of the unit and will result in frosted coils or safety shutdown. Minimum filter area and required sizes are shown in the Physical Data Table. Access to all serviceable components is provided by the following removable panels:. Refer to the Dimensions and Clearances figure for location of these access panels. The room thermostat should be located on an inside wall approximately 56" above the floor where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appliances.

Seven color coded insulated wires should be used to connect thermostat to unit. Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are indicated on the unit Rating Plate.

Field alteration to comply with electrical codes should not be required. A fused disconnect switch should be field provided for the unit. The switch must be separate from all other circuits. Wire entry at knockout openings require conduit fittings to comply with NEC in U. If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring diagram and the same minimum gauge as the replaced wire.

Electrical line must be sized properly to carry the load. Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused. The above waterproofing conditions will also apply when installing a field-supplied disconnect switch.

Refer to Typical Field Wiring Figure for typical field wiring and to the appropriate unit wiring diagram for control circuit and power wiring information. The factory installed heaters are wired for single point power supply. Power supply need only be brought into the single point terminal block and thermostat wiring to the low voltage terminal block located in the upper portion of the unit control box.

These ETL and CGA approved heaters are located within the central compartment of the unit with the heater elements extending into the supply air chamber. Refer to the Dimension and Clearances figure for access panel location. Fuses are supplied, where required, by the factory. Some KW sizes require fuses and others do not. The products of combustion are discharged horizontally through two screened hooded openings on the upper gas heat access panel. Proper sizing of gas piping depends on the cubic feet per hour of gas flow required, specific gravity of the gas and the length of run.

See Pipe Sizing table. The heating value of the gas may differ with locality. The value should be checked with the local gas utility. NOTE: There may be a local gas utility requirement specifying a minimum diameter for gas piping.

All units require a 1 inch pipe connection at the entrance fitting. Maximum capacity of pipe in cubic feet of gas per hour. Based upon a pressure drop of 0. Typical supply piping arrangements are shown in the Supply Connection figures.

All pipe, fittings, etc. Two grommets are shipped in the blower compartment in parts bag taped to the blower housing of every unit with gas heat and should be used in the knockouts when the gas piping enters through the front of the unit. After the gas supply piping has been installed, the bottom opening in the unit should be sealed to prevent water from leaking into the building.

A drip leg and a ground joint union must be installed in the gas piping. When required by local codes, a manual shut-off valve may have to be installed outside of the unit. Use wrought iron or steel pipe for all gas lines.

Pipe compound should be applied sparingly to male threads only. Therefore, a special pipe compound must be applied when wrought iron or steel pipe is used. All piping should be cleaned of dirt and scale by hammering on the outside of the pipe and blowing out the loose dirt and scale.

Before initial start-up, be sure that all of the gas lines external to the unit have been purged of air. After the gas connections have been completed, open the main shut-off valve admitting normal gas pressure to the mains.

Check all joints for leaks with soap solution or other material suitable for the purpose. All gas heat units are shipped from the factory equipped for natural gas use only. The unit may be converted in the field for use with L. All L. For satisfactory operation, L.