York Y34 Refrigeration System, Electric Heating Section, Hot Water Heating Coil, Evaporator Coils

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through each tube, to expel the flue gas and to maintain a negative pressure within the heat exchanger relative to the conditioned space. Induced draft fans shall be direct-drive. One (1) high limit controller per heating module, with auto- matic reset to prevent the heat exchanger from operating at an excessive temperature will be installed. A pressure switch on the combustion section must be provided to prevent igni- tion until sufficient air flow is established through the heat exchanger. Secondary airflow safety shall be provided by roll- out switch protection. The rollout switch shall discontinue fur- nace operation if the flue becomes restricted. Units shall ship with an external flue to be shipped in the unit and mounted on the job site. The flue shall discharge products of combustion above the unit, preventing recycling of corrosive combustion gases back through the heat exchanger. Gas heating sec- tions shall be both ETL and CSA approved to both US and Canadian safety standards.

Optional Modulating Furnace control or Single Stage control available.

Electric Heating Section

An electric slip-in heater shall be installed within the rooftop unit to provide the heating requirements per the schedule shown on the plans. The electric heater shall be wired in such a manner as to provide two equal steps of capacity (80 and 108 kW) or a single step of capacity (40 kW). The furnace shall be an industrial grade design using an open coil(s) made of the highest grade resistance wire containing 80% nickel and 20% chromium. The resistance coil(s) shall be adequately supported in the air stream using ceramic bush- ings in the supporting framework. Terminals of the coil(s) shall be stainless steel with high temperature ceramic bush- ings. The primary high temperature protection shall be an automatic reset type thermal cut out. Secondary protection shall be an automatic reset type thermal cut out. Secondary protection shall be a replaceable thermal link. The operation of the electric heater shall be an integral part of the roof top control system. Power connection to the strip heater shall be through the single power point connection for the entire unit. Electric heat shall be ETL certified to both US and Canadian safety standards.

Hot Water Heating Coil

The manufacturer shall furnish and factory install a hot water coil in the rooftop units, as described in the following specifi- cations. Water coil capacities and pressure drops shall be certified in accordance with ARI Standard 410. The hot water coil shall have eight fins per inch, 2 tubes per circuit, and 2" inlet and outlet connection. Primary surface shall be 1/2" OD copper tube, staggered in direction of airflow. Tubes shall be mandrel expanded to form fin bond and provide burnished, work-hardened interior surface. Return bends shall be die formed and silver-brazed to tubes. Headers shall be of heavy seamless copper tubing, silver-brazed to tubes. Connections shall be of red brass, with male pipe threads, silver brazed to headers. Connections also have 1/4" FPT drain plug on each connection. Extended surface shall consist of die-formed, continuous, aluminum fins with formed channels, and surface treatment to minimize moisture carry-over. Fins shall have

fully drawn collars to accurately space fins, and to form a pro- tective sheath for the primary surface. A structural galvanized steel casing shall protect the coil. Tube sheets on each end shall have drawn collars to support tubes. An intermediate coil support shall be provided. The coil shall be circuited to provide free draining and venting, through one vent and drain. Completed coil, including headers, connections and return bends shall be tested with 325 pounds compressed air under water. Coils shall be designed for operation at 250 psig design working pressure.

Steam Heating Coil

The manufacturer shall furnish and factory install a steam heating coil in the rooftop units, as described in the following specifications. Steam coil capacities and pressure drops shall be certified in accordance with ARI standard 410. The steam coil shall be constructed in the non-freeze style. The steam coil shall have six fins per inch, and 2" inlet, and 1 1/2" outlet connection. Tubes shall be 1" OD seamless copper tubing with a minimum wall thickness of 0.035" and expanded into the fin collars for maximum fin-tube bond. Inner distributing tubes shall be 5/8" OD seamless copper tubing with a mini- mum wall thickness of 1/4". The copper to copper joints shall be joined with high temperature, silver solder. Corrugated fins with integral spacing collars shall cover the entire tube sur- face. Headers shall be constructed of seamless copper. The header tube holes shall be extruded providing better tube to header contact for a stronger braze connection. All header connections shall be of red brass or steel, with male pipe threads and silver braze to headers. Casing shall be 16 gauge galvanized steel. Chafing shall be prevented by extruding and flaring the holes in the tube sheet and interme- diate tube sheet. The core shall be pitched in the direction of the condensate connection for proper drainage. The com- pleted coil (including headers and connections) shall be tested underwater with 325 lbs. compressed air to ensure a leak free coil.

REFRIGERATION SYSTEM

Units shall have two (25 ton), three (30 ton) or four (40 ton) independent refrigerant circuits for maximum load-matching capability. Each refrigerant circuit shall be controlled with a balance-port thermal expansion valve for maximum control at low load conditions.

Evaporator Coils

Evaporator coils shall be direct expansion type with inter- twined circuiting to assure complete coil face activity during part load operation. Coil fins shall be enhanced aluminum type. Coil types shall be 3/8” OD copper, internally enhanced and mechanically expanded to bond with the fins. Coil casing shall be fabricated from heavy gauge galvanized steel. All coils shall be pressure tested at a minimum of 450 PSIG. A galvanized powder painted steel drain pan shall be provided under the entire length and width of the evaporator coil, including all return bends. The main drain pan shall be sloped a total of 1/4” per foot towards the drainage point. Main drain pan shall be easily cleanable in the field. The condensate drain opening shall be flush with the bottom of the drain pan

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Contents Featuring Millennium Simplicity Elite FeaturesMillennium Single Package Rooftop Units TOMORROW’S Unit Today GeneralTable of Contents List of Figures Power Exhaust ONE Forward CurveElectrical Data 40 TON with Electric List of TablesOverview Features and BenefitsInstallation Features Construction Features Field Installed Accessories List of Features and BenefitsStandard Features Factory Installed OptionsNomenclature General Physical Data Unit Tons Model Type Selection ProcedureRefrigerant Charge Select UnitModulating GAS Heating Capacities Temperature RiseStandard GAS Heating Capacities Minimum Heating CFMElectric Heating Capacities Modulating HeatMBH Static Resistance HOT Water Coil 25 & 30 TON HOT Water HEATING1Physical Data HOT Water Coil 1 ROW Water Pressure Drop 1 ROW, 25 & 30 TONHOT Water Coil 1 ROW 40 TON1 HOT Water Coil 25 & 30 TON, 1 ROW, AT 10 GPM HOT Water Coil 25 & 30 TON, 1 ROW, AT 30 GPM HOT Water Coil 40 TON, 1 ROW, AT 10 GPM HOT Water Coil 40 TON, 1 ROW, AT 30 GPM HOT Water Coil 2 ROWS, 40 TON1 Physical Data HOT Water Coil 2 ROWWater Pressure Drop 2 ROW, 25 & 30 TON HOT Water Coil 2 ROW, 25 & 30 TON1HOT Water Coil 25 & 30 TON, 2 ROW, AT 20 GPM HOT Water Coil 25 & 30 TON, 2 ROW, AT 60 GPM HOT Water Coil 40 TON, 2 ROW, AT 20 GPM HOT Water Coil 40 TON, 2 ROW, AT 60 GPM Static Resistance Steam Coil 1 ROW, 40 TON Steam HeatingPhysical Data Steam Coil 1 ROW Steam Coil 1 ROW, 40 TONSteam Coil 40 TON, 1 ROW STD Exhaust FAN Drive DataSupply FAN Motor and Drive DATA1 RPMExample Supply AIR Drive Adjustment30 TON Drive Adjustment 25 TON Drive Adjustment40 TON Drive Adjustment HP M Otor & 976 RPM D Rive Drive Adjustment for Power Exhaust 25 TONDrive Adjustment for Power Exhaust 30 & 40 TON RPM REQ’D PDMBH Cooling Performance 25 TONCooling Performance 30 TON Standard Capacity Coil 95F 105F 125F Cooling Performance 30 TON High Capacity Coil 95F 105F CFM Cooling Performance 40 TON Standard Capacity Coil 95F 105F 115F 125F Cooling Performance 40 TON High Capacity Coil 95F 105F 115F 125F AIR Temp Altitude Feet Altitude Correction FactorsYTG-E-0108 Available External Static Pressure IWG Airflow CFM RPM BHP3 FAN Performance 25 TON1800 RPM BHP3 FAN Performance 30 TON 1Ton Forward Curve 18000 FAN Performance 40 TON1,2FAN Performance 40 TON FAN Performance 25 & 30 TON AIRFOIL1,2 1601 1636 1672 1707 1740 FAN Performance 40 TON AIRFOIL1,2 17000 18000 Component Static RESISTANCE1 Available External Static Pressure IWG Airflow CFM RPM BHP2 Power Exhaust ONE Forward Curved FAN 25 TON1Power Exhaust 25 Ton Power Exhaust TWO Forward Curved Fans 30 & 40 TON1 Power Exhaust TWO Forward Curved Fans 30 & 40 Tons Electrical Data 30 TON Basic Unit R22 Electrical Data 25 TON Basic Unit R22Electrical Data 40 TON Basic Unit R22 RLA LRA MCC QTY FLA Electrical Data 25 TON with Electric Heat R22MCA MPSQTY RLA LRA MCC FLA Electrical Data 30 TON with Electric Heat R22Electrical Data 40 TON with Electric Heat R22 Electrical Data 25 TON with Power Exhaust R22 Electrical Data 30 TON with Power Exhaust R22 Electrical Data 40 TON with Power Exhaust R22 RLA LRA MCC YTG-E-0108 11.0 14.2 100 22.2 17.0 22.0 110 208-3-60 460-3-60 11.0 17.0 12.4 19.3 100 22.0 110 27.0 102 109 125 107 208-3-60 460-3-60 11.0 17.0 100 12.4 19.3 110 22.0 101 125 27.0 107 102 109 LECT. H EAT Unit WeightsSupply FAN Motor VFD Weights Exhaust FAN Motor VFD WeightsAttenuation Factors Unit CornerweightIndoor Sound Power Rating Outdoor Sound Power RatingRear Left Side Right Left Side Left Side Rear Front Rear Rear Millennium Overhead View Back View Endfixedreturnoutsideorwithair Partial Roof Curb Model 1RC0455P Guide Specifications York Millennium 25, 30, & 40 TON Units Heating System Optional Energy Recovery Ventilation Field Installed OptionAIR Filtering System AIR Inlet SystemSteam Heating Coil Refrigeration SystemElectric Heating Section Hot Water Heating CoilControls Equipment Control Features Comfort Control FeaturesOverview Optional Communication TranslatorOptional Control Available AccessoriesJohnson Controls Unitary Products York Drive Norman, OK

Y32, Y34, Y33 specifications

The York Y33, Y32, and Y34 series represents a significant advancement in rooftop packaged units designed for commercial HVAC applications. These models are known for their reliability, energy efficiency, and innovative features that cater to diverse climate control needs.

The York Y33 series introduces modern features aimed at maximizing comfort and reducing energy costs. Its sleek design and compact size make it a versatile option for various applications, including retail spaces, office buildings, and industrial facilities. One of the standout features of the Y33 is its variable-speed compressor technology. This allows the unit to adjust its cooling output based on real-time demand, resulting in notable energy savings compared to traditional single-speed units.

The Y32 model builds upon the strengths of the Y33, offering enhanced capabilities for large commercial spaces. It incorporates advanced controls and building management system (BMS) connectivity, enabling seamless integration into existing infrastructure. The Y32 is designed with a focus on ease of maintenance and serviceability, featuring accessible components that streamline repair processes.

The York Y34 series emphasizes environmentally friendly practices, utilizing low-GWP refrigerants that minimizes its impact on the environment. It also boasts improved heat exchangers that increase efficiency and performance. The Y34’s design minimizes noise levels, making it ideal for applications where quiet operation is paramount, such as schools and healthcare facilities.

All three models share several key technologies, including fan and motor designs that optimize airflow while reducing energy consumption. Additionally, the series features enhanced insulation, significantly improving thermal performance and reducing the risk of condensation-related issues.

In summary, the York Y33, Y32, and Y34 models represent a commitment to innovation in commercial HVAC systems. Their combination of advanced technology, energy efficiency, and user-friendly design makes them suitable for a variety of applications while promoting sustainability and operational cost-effectiveness. Investing in these units not only supports optimal indoor climate control but also aligns with the growing demand for eco-friendly solutions in today’s commercial landscape.
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