York 2000 Filters, Condensate Drain, Service Access, Blower Speed Selection, Compressors

511.06-N5Y

casing.

Outdoor ductwork must be insulated and water- proofed.

Refer to Figure 6 for information concerning side and bottom supply and return air duct openings.

FILTERS

1" filters are supplied with each unit. 2" replacement filters may be used with no modification to the filter racks. 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 Table 3.

CONDENSATE DRAIN

Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install a condensate drain line from the 3/4" PVC female connection on the unit to spill into an open drain.

NOTE: The condensate drain line MUST be trapped to provide proper drainage. See Figure 2.

SERVICE ACCESS

FIG. 2 - RECOMMENDED DRAIN PIPING

Access to all serviceable components is provided by the following removable panels:

•Compressor compartment

•Heater compartment

•Blower compartment

•Main control box

•Filter compartment

•Motor Access (on units w/belt-drive option)

Refer to Figure 6 for location of these access panels.

BLOWER SPEED SELECTION

Three blower motor speeds are available on the direct-drive units. The speed selection for the direct-drive units is determined by the CFM and ESP requirements of the applications. All units with belt-drive option have an adjustable motor pulley to achieve the above conditions.

All direct-drive units are shipped with the black wire (labeled #8) connected to the high speed tap on the blower motor. If a lower blower speed is desired, this wire should be moved to the medium or low speed tap on the motor.

DISCONNECT SWITCH BRACKET FOR UNITS WITH OPTIONAL BELT-DRIVE BRACKET

A special bracket for mounting a field-supplied disconnect switch is provided in each unit ordered with an optional belt-drive supply air blower. The bracket is shipped inside the blower compartment taped to the top of the blower housing. Install the bracket on the left hand side of the unit as shown in

Figure 6. Several existing screws at the top of the unit and one approximately midway down from the top will be used for mounting the bracket. Screws should be loosened only - NOT REMOVED. Mounting holes in the bracket have elongated keyways allowing easy installation. Re-tighten screws after bracket is in place to ensure panels will remain leak tight.

COMPRESSORS

On some units the compressor is mounted on springs which have been tightened down for shipment only.

After this unit is installed, back out the compressor bolts until the sleeve clears the top grommet.

CAUTION: Do Not loosen compressor mounting bolts.

THERMOSTAT

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. Follow manufacturer’s instructions enclosed with thermostat for general installation procedure. Color coded insulated wires (#18 AWG) should be used to connect thermostat to unit. See Figure 3 for wiring details.

NOTE: On units with economizer, remove jumper "J1" from terminals 8 and 10 on plug connector J3/P7 on the relay board in the unit control box. Refer to the unit wiring labels located on the inside of the control box access panel.

An "Emergency Heat" position is provided with the thermostat. In the "Emergency Heat" position, the thermostat will allow electric resistance heat only. The compressor will be locked out. A pilot light on the thermostat will indicate that the switch is on "EM HT".

POWER AND CONTROL WIRING

Field wiring to the unit must conform to provisions of the National Electrical Code (NEC) ANSI/NFPA No. 70 (in U.S.A.), current Canadian Electrical Code (CEC) C22.1 (in Canada) and/or local ordinances. The unit must be electrically grounded in accordance with the NEC and CEC (as specified above) and/or local codes. Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are indicated on the unit Rating Plate and Table 1.

The wiring harness furnished with this unit is an integral part of a UL and C.G.A. design certified unit. Field alteration to comply with electrical codes should not be required.

A disconnect switch should be field provided for the unit. The switch must be separate from all other circuits. Refer to Figure 6 for installation location. If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring diagram.

Electrical lines must be sized properly to carry the load. USE COPPER CONDUCTORS ONLY. Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly protected.

CAUTION: When connecting electrical power and control wir- ing to the unit, waterproof type connectors MUST BE USED so that water or moisture cannot be drawn into the unit during normal operation. The above waterproofing conditions will also apply when installing a field-supplied disconnect switch.

Refer to Figure 3 for typical field wiring and to the appropriate unit wiring diagram for control circuit and power wiring information. Refer to Tables 9 and 10 for electrical data.

4 Unitary Products Group