York PCE6*36 Series Technical Manual

Contents

unit clearances

5324339-YTG-D-11172 Johnson Controls Unitary Products• Durable Finish - The cabinet is made of G90 galvanizedsteel with a powder paint coating for appearance and protec-tion. The pre-treated galvanized steel provides a better paint-to-steel bond, which resists corrosion and rust creep. Pow-der paint finish ensures less fading when exposed to sun-light, and provides superior corrosion resistance (1000 hoursalt spray tested).• Full Perimeter Base Rails - The easily removable base railsprovide a solid foundation for the entire unit and protects theunit during shipment. The rails provide fork lift access fromall sides, and rigging holes are also provided so that an over-head crane can be used to place the units on a roof. Onapplications where the unit is placed on a pad, the base willkeep the unit off the pad to deter corrosion. On applicationswhere height is limited, the base rails may be removed byremoving 2 screws in each corner.• Attractive Appearance - A single-piece top cover containinga top-discharge condenser fan arrangement requires lesssquare footage on installation and provides a wider variety ofinstallations. The one-piece design adds greater water integ-rity. Rounded corners with water drip edges add to the attrac-tive appearance.• Top Discharge - The top-discharge outdoor fan does notdisrupt neighboring areas or dry out vegetation surroundingthe unit. The warm air from the top mounted fan is blown upand away from the structure and any landscaping.• Outdoor Coil Grille - All models utilize a stamped slotteddesign which provides superior impact protection againstsmall objects during transit and after installation.• Low Operating Sound Level - The upward air flow carriesthe normal operating noise up and away from the living area.The rigid top panel effectively isolates noise. Isolatormounted compressor and the rippled fins of the outdoor coilmuffle the normal fan motor and compressor operatingsounds. The unique formed base pan also aids in soundattenuation with its structural design.• Fan System - All models operate over a wide range ofdesign conditions with an enhanced ECM indoor fan motor.These units easily match all types of applications and pro-vide greater on-site flexibility to match comfort requirements.The cooling speed is factory-set and can be field-adjusted toa second speed. The heating speed is factory set to maintainmid point rise at the units heating input, but can be fieldadjusted. This allows maximum comfort conditions.• Dehumidification/Humidity Switch Input - This model unitfeatures a built in de-humidification feature for advanceddehumidification during cooling operation. The unit indoorblower control is designed to work with a humidity controlthat closes when the humidity is below the set-point. Thecontrol is open when the humidity is above the set-point. Thishumidity control may be referred to as a humidistat or dehu-midistat.To use this feature, the control HUM STAT jumper must beset to YES and a humidistat is connected from the low volt-age R and HUM color coded leads. During cooling operationif the humidity level is above the humidistat set point, theindoor blower speed is reduced by approximately 15%.• Simple Control Circuit - Field thermostat wiring connect tocolor coded leads using twist on wire connections. Coolingcontrols use a contactor and a 2nd stage 24 VAC to 24 VDCrectifier for simple application and troubleshooting. Mate-n-lock plug connectors are used. Enhanced ECM indoorblower control is managed by a multi-stage indoor blowercontrol board that includes field adjustable speed tap jump-ers for maximum flexibility and product application. Theelectrical control box is not located in the compressor com-partment. The controls are mounted to allow the separateaccess panel to be removed for trouble shooting and main-tenance without affecting the normal system operating pres-sures. All wiring internal to the unit is color/number coded.• Protected Compressor - The compressor is internally pro-tected against high pressure and temperature. This isaccomplished by the simultaneous operation of scroll bypassand a temperature sensor which protect the compressor ifundesirable operating conditions occur.• Pressure Switches - A high pressure switch is standard inall units. It is an automatic reset switch. When dischargepressure reaches 650 psi, the compressor will de-energizeuntil pressure reaches 450 psi.• Loss of Charge Switch - All models include a loss of chargeswitch to provide safe shutdown of compressor.• Exclusive Coil Design - Grooved copper tubes andenhanced aluminum fin construction improves heat transferfor maximum efficiency and durability for long-lasting durabil-ity and efficient operation. Indoor coils will use tin-coatedcopper tubing with aluminum fins for effective heat transfer.• Electric Heat - All PCE models use 6HK electric heat, whichare available in 460V/3/60 from 10 kW to 25 kW. Single pointfield wiring kits are available for all applications.• Low Maintenance - Long life, permanently lubricated indoorand outdoor fan motor bearings need no annual mainte-nance, adding greater reliability to the unit. Slide-out blowerassembly and indoor coil assembly can be easily removedfor cleaning.• Easy Service Access - Individual access panels are pro-vided in access to all major components - compressors,indoor coils, blower, controls/electric heat kits, filters, etc.that makes servicing easy. Removing these panels alloweasy removal of the components such as the blower assem-bly for maintenance and ease of troubleshooting.• Replacement Parts - The installer requires no special train-ing to replace any of the components of these units and thenumber of new components have been reduced to minimizethe inventory of unique parts.• Filter Frame Kit - All 3 phase PCE6 units include a filterframe kit, which is shipped inside the unit from production.Field installation is required.• Filters - All 3 phase PCE6 units include an applicable num-ber of 1" washable filters, which are shipped inside the unitfrom production. Field installation is required. Three filtersare required for B base units.