RT-OA TM Rooftop Outdoor-Air (DOAS)

Transcription

1 RT-OA TM Rooftop Outdoor-Air (DOAS) A/C s & HEAT PUMPS Dedicated Outside-Air System (DOAS) Solutions Office Buildings, Schools, Hospitals, Restaurants, Gyms & Fitness Centers, Hotels, Retail Stores...! Features & Benefits ASHRAE Compliant 44-18, CFM (3-6 Tons) DX Air Cooled, Water Cooled & Heat Pumps Systems Down-Flow & Horizontal Air Patterns Powder-Coat Painted Heavy Duty Steel Cabinet & Frame Double-Wall (2 ) Panel Construction Inner-Lined with Rigid Polyurethane Foam (R-13 or Greater Value) Hot Gas Reheat (modulating) Digital Scroll Compressors Provide Precise Part-Load Control Backward-Inclined Direct-Drive Variable Speed EC Plenum Fans ElectroFin E-coat or Heresite Coated Coils Options Low Ambient Head Pressure Control Power Exhaust & Return Air Options Electric, Gas Fired & Hot Water Heat Options RT-OA - DOAS Rooftop Outdoor-Air Units (RTOA-LB1.) 1

2 INTRODUCTION AboveAir RT-OA Outdoor Air Rooftop Dedicated Outdoor Air Systems (DOAS) are designed to provide year-round treatment of your ventilation requirements. Systems are available from 44-18, CFM (3-6 Tons) in a variety of dehumidfication & heating methods. RT-OA systems incorporate energy saving precision control variable speed digital scroll technology along with total energy recovery wheels, modulating gas fired or SCR electric heat options. Down-Flow Air Pattern CONDENSER AIR INLET CONDENSER AIR OUTLET EVAP SUPPLY AIR OUTLET EVAP RETURN AIR INLET OUTDOOR AIR INLET EXHAUST AIR OUTLET Horizontal Air Pattern CONDENSER AIR OUTLET CONDENSER AIR INLET OUTDOOR AIR INLET EXHAUST AIR OUTLET EVAP RETURN AIR INLET EVAP SUPPLY AIR OUTLET ASHRAE Compliant R41a Refrigerant Modulating Digital Scroll Technology Flexible Options and Accessories Ease of Serviceability Contents Introduction...2 Features and Benefits...3 Configuration Opitons Overview Energy Recovery & Controls Nominal Performance Data...8 Additional AboveAir Products Introduction

3 FEATURES & BENEFITS RT-OA Outdoor Air (44-18, CFM (3-6 Tons)) Variety of Standard & Optional Features Standard Features: MC-3/5/7-OA Advanced Micro Controls Digital Scroll Compressors (1 or 2 Circuits) Backward-Inclined Direct-Drive EC Plenum Fans Painted Steel Cabinet & Frame Construction R-13 Double-Wall (2 ) Rigid Polyurethane Foam Panel Construction Sloped Stainless Steel Drain Pan w/ Overflow Switch Hot Gas Reheat with Modulating 3-Way Valve Aluminum Fin / Copper Tube Coils Low Leakage AMCA Certified Dampers TXV, Refrigerant Filter-Driers & Sight-Glasses High & Low Refrigerant Pressure Switches 2 Merv-8 Pre & 4 Merv-13 Final Filters Intertek (ETL) Listed per UL1995 Test Standard Optional Features & Accessories: Total or Sensible Energy Recovery Wheel Electric SCR Fired Heat Gas Fired Heat (Modulating Control) Power Exhaust & Return Air Variable Air Volume (VAV) Control Options BMS Communications (BACnet or ModBus) ElectroFin E-coat or Heresite Coated Coils Modulating Head Pressure Control (Standard) Main Power Electrical Disconnect CO 2 Sensor, Smoke Detector & Firestat Roof-Curbs Split Condensing Unit Option Air Source or Water Source Heat Pump... Additional Options Available! Features & Benefits 3

4 Configuration Options 4 Configuration Options

5 Configuration Options... Continued Configuration Options 5

6 Energy Recovery Wheel - Overview INDOOR AIR QUALITY ENERGY RECOVERY FLUTED WHEEL MEDIA UNITARY WHEEL CASSETTE UWC / UWCH UWC/UWCH KEY BENEFITS Independently tested & AHRI certified wheel performance High Enthalpy Performance = Less Pressure Loss, Less Fan Energy, More Energy Savings, Low operating costs The SEMCO Unitary Wheel Cassette (UWC) Series, a sensible and latent energy recovery aluminum desiccant wheel, is designed and packaged as the HVAC industry s first drop in replacement for most OEM wheels used by packaged rooftop unit manufacturers. Use of the AHRI Certified mark indicates a manufacturer s participation in the certification program. For verification of certification for individual products, go to High latent AND sensible heat transfer efficiencies Highest Recovery Efficiency Ratios (RER) available in the industry Industry-leading indoor air quality device through minimized desiccant cross contamination Integrated purge section option Wheel independently certified to pass NFPA 9A requirements for flame spread and smoke generation and ASTM E84 fire test method Proven reliable operation The UWC Series 3-3/4-inch-wide (1-mm) wheels feature a fast-acting, corrosion-resistant, proprietary desiccant that s applied to a sturdy, but lightweight all-aluminum wheel substrate. The honeycomb matrix s fluted opening design efficiently produces maximum latent and sensible air-to-air heat transfer, but generates up to 5-percent less HVAC system static pressure than polymer film wheels. Besides assisting buildings in surpassing ASHRAE 9.1 building energy compliance, the aluminum wheels also have longer life cycles and vastly less periodic maintenance requirements than polymer wheels and can withstand temperatures of up to 18 F. Low maintenance Proven long life expectancy 6 Controls Options

7 Control Options Variety of High Percentage Outdoor-Air (HPOA) Control Options SENSIBLE HEAT RATIO = Qs / Qt PSYCHROMETRIC CHART NORMAL TEMPERATURE I-P Units SEA LEVEL BAROMETRIC PRESSURE: IN. OF MERCURY SENSIBLE HEAT Qs TOTAL HEAT Qt.2.1 ENTHALPY h HUMIDITY RATIO W ENTHALPY - BTU PER POUND OF DRY AIR 35 SATURATION TEMPERATURE - F Dehumidifica on Dehumidifica on Enable Set Point DEW POINT TEMPERATURE - F ENTHALPY - BTU PER POUND OF DRY AIR Sensible Hea ng Hea ng Enable Set Point Vent Only Chart by: HANDS DOWN SOFTWARE, DRY BULB TEMPERATURE - F Cooling Enable Set Point Sensible Cooling SENSIBLE HEAT RATIO = Qs / Qt MC-3/5/7N - Space Neutral MC-3 / MC-5 / MC-7 (Advanced Dewpoint Controls) The MC-3/5/7N control sequence provides a constant, neutral supply air temperature for make-up air, space pressurization, or as a parallel outdoor air source. These systems are typically 1% outdoor air. MC-3/5/7P - Space Primary The MC-3/5/7P control sequence provides temperature and humidity control of a single zone. This control sequence is applied for high percentage outdoor air situations (>2% OA) where a single unit is required to meet both the outdoor air requirement, as well as, controlling the space temperature. MC-3/5/7V - Variable Air Volume (VAV) The MC-3/5/7V control sequence is a variable air volume sequence intended to provide a constant supply air temperature and vary fan speed according to the system static pressure for units with high percentage outdoor air (>2% OA) where the ability to maintain dehumidification while resetting the supply air temperature is a concern. It serves multiple zones where each zone is provided with a VAV box with reheat. MC-3/5/7Z - Single Zone VAV The MC-3/5/7Z control sequence is a variable volume control sequence which provides temperature and humidity control of a single zone. Both the fan speed and supply air temperature will vary according to the requirements of the single zone. The outdoor air percentage should be no greater than 2%. Controls Options 7

8 TECHNICAL DATA Performance Data: Cabinet Size AboveAir RT-OA TM Outdoor Air Units - Cooling Performance (DX - Air Cooled Data) AboveAir Model Nominal Tonnage 1% Outside-Air Airflow Range 1% OA with Energy Recovery Wheel (ERW) Airflow Range "A" RT-OAA-_-A_3/5 3-5 Tons CFM 9-1,49 CFM "B" RT-OAB-_-A_6/1 6-1 Tons 87-1,44 CFM 1,79-2,98 CFM "C" RT-OAC-_-A_12/ Tons 1,73-2,59 CFM 3,58-5,36 CFM "D" RT-OAD-_-A_2/3 2-3 Tons 2,87-4,31 CFM 5,96-8,93 CFM "E" RT-OAE-_-A_4/6 4-6 Tons 5,74-8,61 CFM 11,91-17,86 CFM Note: Cooling Capacity based on: 95 F DB/78 F WB OA, 55 F DB/54 F WB LAT Additional AboveAir Products SC - 2x4 SpotCool Comfort & Precision (1 to 3 Tons) HK - Horizontal Comfort, Precision & HPOA (1 to 3 Tons) VK - Vertical Comfort & HPOA (1 to 45 Tons) Floor Console Precision (1 to 3 Tons) MC - MissionCritical Vertical Data Center Precision (1 to 3 Tons) Remote Air Cooled Condensers, Condensing Units & Glycol Drycoolers (1 to 18 Tons of THR) Single, Dual & Triplex Glycol Pump Packages (1/2 to 5 HP) Mountville Road Frederick, Maryland 2173, U.S.A. Phone: , Facsimile: sales@aboveair.com Copyright 9/18 Form: RTOA-LB1. Specifications are subject to change without notice.