York R-410A manual Electric Heating Section If Equipped

246824-YTG-G-1208

d. Flame proving controls. Unit shall have two independent stages of capacity (60% 1st stage, 100% 2nd stage).

ELECTRIC HEATING SECTION (IF EQUIPPED)

An electric heating section, with nickel chromium elements, shall be provided in a range of 9 thru 54 KW, offering two states of capacity all sizes. The heating section shall have a primary limit control(s) (automatic reset) to prevent the heating element system from operating at an excessive temperature. The Heat- ing Section assembly shall slide out of the unit for easy mainte- nance and service. Units with Electric Heating Sections shall be wired for a single point power supply with branch circuit fusing (where required).

UNIT OPERATING CHARACTERISTICS

Unit shall be capable of starting and running at 125 ºF outdoor temperature, exceeding maximum load criteria of ARI Standard 340/360. The compressor, with standard controls, shall be capable of operation down to 0 ºF outdoor temperature. Unit shall be provided with fan time delay to prevent cold air delivery before heat exchanger warms up. (Gas heat only)

ELECTRICAL REQUIREMENTS - All unit power wiring shall enter unit cabinet at a single factory provided location and be capable of side or bottom entry to minimize roof penetrations and avoid unit field modifications. Separate side and bottom openings shall be provided for the control wiring.

STANDARD LIMITED WARRANTIES - Compressor – 5 Years, Heat Exchanger – 10 Years, Elect. Heat Elem. – 5 Years, Parts – 1 Year

maximum leakage rate for the outdoor air intake dampers shall not exceed 2% when dampers are fully closed and operating against a pressure differential of 0.5 IWG. A unit-mounted potentiometer shall be provided to adjust the outdoor and return air damper assembly to take in the design CFM of outdoor air to meet the ventilation requirements of the conditioned space during normal operation. Whenever the indoor fan motor is energized, the dampers open up to one of two pre-selected positions

–regardless of the outdoor air enthalpy. Dampers return to the fully closed position when the indoor fan motor is de-energized. Dampers shall fully close on power loss.

ADDITIONAL FACTORY INSTALLED OPTIONS

•ALTERNATE INDOOR BLOWER MOTOR – For applications with high restrictions, units are available with optional indoor blower motors that provide higher static output and/or higher airflow.

•CONVENIENCE OUTLET (POWERED/NON-POWERED)– Unit can be provided with an optional 120VAC GFCI outlet with cover on the corner of the unit housing the compressors.

•ELECTRIC HEAT - Electric Heaters range from 9 kW to 54 kW and are available in all the voltage options of the base unit.

•PHASE MONITOR - Designed to prevent damage in out- of-phase condition.

•COIL GUARD - Designed to prevent condenser coil damage.

•BAS CONTROLS - Include supply air sensor, return air sensor, dirty filter indicator and air proving switch.

FACTORY INSTALLED OPTIONAL OUTDOOR AIR (Shall be made available by either/or):

•ELECTRONIC ENTHALPY AUTOMATIC ECONOMIZER

– Outdoor and return air dampers that are interlocked and positioned by a fully-modulating, spring-return damper actuator. The maximum leakage rate for the outdoor air intake dampers shall not exceed 2% when dampers are fully closed and operating against a pressure differential of 0.5 IWG. A unit-mounted potentiometer shall be provided to adjust the outdoor and return air damper assembly to take in outdoor air to meet the minimum ventilation requirement of the conditioned space during normal operation. During economizer operation, a mixed- air temperature control shall modulate the outdoor and return air damper assembly to prevent the supply air temperature from dropping below 55 ºF. Changeover from compressor to economizer operation shall be provided by an integral electronic enthalpy control that feeds input into the basic module. The outdoor intake opening shall be covered with a rain hood that matches the exterior of the unit. Water eliminator/filters shall be provided. Simultaneous economizer/compressor operation is also possible. Dampers shall fully close on power loss. Available with barometric relief or power exhaust.

•MOTORIZED OUTDOOR AIR DAMPERS – Outdoor and return air dampers that are interlocked and positioned by a 2-position,spring-return damper actuator. The

•DIRTY FILTER SWITCH – This kit includes a differential pressure switch that energizes the fault light on the unit thermostat, indicating that there is an abnormally high- pressure drop across the filters.

•BREAKER – An HACR breaker can be factory installed on gas heat units or cooling units with electric heat.

•DISCONNECT SWITCH - A disconnect can be factory installed on a cooling only units sized for the largest electric heat available.

•STAINLESS STEEL HEAT EXCHANGER – For applications in a corrosive environment, this option provides a full stainless steel heat exchanger assembly.

•SMOKE DETECTOR – A smoke detector can be factory mounted and wired in the supply and/or return air compartments.

OTHER PRE-ENGINEERED ACCESSORIES AVAILABLE

•ROOF CURB - 14” and 8” high, full perimeter knockdown curb, with hinged design for quick assembly.

•BAROMETRIC RELIEF DAMPER – (Unit mounted – Downflow, Duct Mounted – Horizontal) – Contains a rain hood, air inlet screen, exhaust damper and mounting hardware. Used to relieve internal air pressure through the unit during economizer operation.

12 Johnson Controls Unitary Products