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- CAT 903 Air Terminal Units
CAT 903 Air Terminal Units
CAT 903 Air Terminal Units
The document provides comprehensive information on Daikin's Air Terminal Units, specifically models MQTH, MQFCI, and MQFVI, which are essential components of variable air volume (VAV) systems aimed at optimizing airflow and reducing energy consumption.
The MQTH-500 model is a key component in VAV systems, featuring low friction bearings, continuous welds for minimal leakage, and heavy-duty construction. It is available in configurations such as cooling only, with hot water coil, and with electric heat.
The units are designed with features to enhance performance and durability, including low friction thermoplastic bearings, continuous welded ducts, heavy-duty damper construction, galvanized steel casing, and AHRI certification.
Dimensions and weights for various configurations of the MQTH-500 are detailed, including options with hot water coils and electric heat.
Models MQFCI and MQFVI are discussed, focusing on their application in series and parallel configurations, designed to provide consistent airflow with additional features like hot water coils and electric heat.
Performance metrics for each model are provided, including AHRI certified rating points, ensuring the units meet industry standards for efficiency and performance.
A range of options and accessories are available for customization, including different construction materials, insulation options, and control systems.
Additional technical details are provided, such as UL 1995 compliance for electric heat design and assumptions for sound path attenuation.
All models are certified in accordance with the AHRI 880 certification program, and the insulation used meets ASHRAE 62.1 requirements.
Several tables provide critical data, including dimensions, weights, performance data, sound power levels, and leakage rates.
The MQTH-500 series offers a range of air terminal units suitable for various HVAC applications, with comprehensive performance data and compliance with industry standards ensuring reliability and efficiency.
Series units provide constant volume and variable temperature air, while parallel units operate intermittently, typically during heating, leading to lower noise levels and reduced energy usage.
Series terminals provide constant volume with variable temperature, while parallel terminals offer variable volume with constant temperature during cooling.
Units are tested per ANSI/ASHRAE Standard 130 and certified according to AHRI 880, meeting UL 1995, CSA 236, and ASHRAE 62.1 standards.
Daikin's MQFCI series fan-powered terminal units are designed for energy efficiency and occupant comfort, featuring galvanized steel casing, energy-efficient motors, and multi-quadrant averaging flow sensors.
Detailed dimensions for various configurations of the MQFCI-600 series are provided, including options with hot water and electric heat.
Performance data for the MQFCI-600 air terminal units focus on radiated and discharge sound power levels across various case sizes and inlet sizes.
Tables provide AHRI certified radiated sound power, discharge sound power levels, and radiated sound power levels at various inlet static pressures.
Detailed performance data for Daikin's MQFCI-600 air terminal units include sound power levels with end reflection corrections and motor amperage ratings.
Performance data is obtained from laboratory testing in accordance with AHRI 880-2011 and ANSI/ASHRAE 130-2008 standards.
AHRI certified data is outlined with a bold border, and NC values are calculated using attenuation credits from AHRI 885-2008.
Minimum Ps is the static pressure drop across the air terminal unit with the inlet damper wide open at a given airflow rate.
Tables present sound power levels across octave bands for various airflow rates and static pressures.
Performance curves for the FCI-600 ECM fan illustrate the relationship between airflow rate and static pressure.
Hot water coils are factory-mounted to the terminal's discharge, constructed with aluminum fins and copper tubes, and tested at 300 psig.
Electric heaters are integrated into the air terminal, featuring ETL® listed components and a fan interlock relay.
Daikin's MQFVI-500 units are designed for variable volume and constant temperature air delivery, featuring energy-efficient motors and factory-calibrated controls.
Detailed dimensional data for various configurations of the MQFVI-500 units is provided.
Performance data within a bold border are AHRI certified, while others are application ratings outside the certification scope.
Tables provide sound power levels for different case sizes and inlet sizes at various airflow rates and static pressures.
Tables list the amperage ratings for standard PSC and ECM motors across different voltages and phases.
Tables show damper leakage rates at different static pressure differentials for various inlet sizes.
Tables detail the minimum static and total pressure drops for air terminal units with and without coils.
Tables provide MBH and kW selection data for hot water coils, assuming specific entering water and air temperatures.
The document provides detailed technical specifications and performance data for Daikin's MQFVI-500 Air Terminal Units, focusing on hot water coils and electric heat components.
The air terminal units are constructed with 20-gauge steel and feature hanger brackets for installation.
Hot water coils are factory-mounted to the terminal discharge and constructed with aluminum fins and copper tubes.
Electric heaters are integral to the air terminal, with ETL® listed components and fan interlock relays.
Tables and figures illustrate fan performance curves for different unit sizes and configurations.
Options include hot water coils with access doors, electric heaters with multiple voltage options, and various insulation types.
The document serves as a comprehensive guide for selecting and understanding the performance and construction of Daikin's MQFVI-500 Air Terminal Units.
The document outlines standard and optional configurations for fan-powered units, specifying the placement of controls and coil connections.
Hanger brackets are provided for field installation, and inlet elbow attenuators are available to reduce noise.
Various insulation types are available, each with different thermal and acoustical properties.
Access panels for motors and blowers are standard, while coil access requires additional insulated duct sections.
Daikin uses multi-quadrant averaging flow sensors for accurate airflow measurement.
The dampers are designed for excellent sealing and noise reduction.
The document discusses optimal water flow direction for performance and provides guidelines for coil venting and draining.
Various accessories and features for electric heaters are detailed, including disconnecting break contactors and wiring requirements.
PSC motors are commonly used, with specifications on speed and efficiency.
The document discusses the efficiency of PSC and ECM motors in VAV systems.
Daikin standard motors are available in 120V and 277V single-phase, with an optional 208-240V single-phase motor.
The document provides a detailed table of motor amperage ratings for various models and voltages.
ECM motors are brushless DC motors with built-in speed and torque controls.
Daikin provides two fan control interfaces for ECM motors: ECM-VCU and ECM-RPM.
Daikin can integrate various DDC systems into their air terminal units.
Daikin air terminal units with electric heat comply with UL 1995 standards.
The document outlines the importance of maintaining specific airflow and temperature limits.
The document references AHRI-885-08 standards for sound path attenuation.
This document outlines the assumptions and parameters for discharge sound path attenuation in HVAC systems.
- Small Applications: Total dB reduction ranges from 24 to 59 across octave bands 2 to 7.
- Medium Applications: Total dB reduction ranges from 27 to 53.
- Large Applications: Total dB reduction ranges from 29 to 52.
- Proper design of central system equipment and distribution ductwork is crucial to minimize noise.
- High static pressure in primary duct systems can lead to increased noise levels and inefficient operation.
- Balancing dampers should be used to reduce inlet pressure at each unit.
- Avoid improper use of flex duct and ensure proper installation to prevent noise breakout.
- Design engineers should perform acoustical analysis using AHRI Standard 885 to determine acceptable sound power levels.
Daikin offers training for HVAC products, accessible via their website or by contacting their training department.
Daikin equipment is sold with a Limited Product Warranty. For warranty details, parts, and service information, visit the Daikin Applied website or contact their service offices.
Catalog excerpts
Models MQTH, MQFCI and MQFVI Model MQTH Model MQFCI Model MQFVI
Open the catalog to page 1
Single Duct Air Terminal Units . . . . . . . . . . . . . 3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 MQTH-500 Single Duct Air Terminal Unit . . . . . . . . . . . . . . . . . . . . . 3 Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Open the catalog to page 2
Single Duct Air Terminal Units MQTH-500 Single Duct Air Terminal Unit The Daikin single duct terminal units are at the core of today’s variable air volume (VAV) systems. The staple of today’s HVAC system designer, VAV systems lower operating costs by using less central fan energy and less refrigeration energy. VAV systems also have lower first costs by allowing the designer to take advantage of the building’s diversity. The primary function of the Daikin single duct terminal units is to regulate conditioned air flow into an occupied zone in response to a control signal. Daikin single duct terminal...
Open the catalog to page 3
• Damper rotates in a self-lubricating, long life, low friction thermoplastic bearing Continuous Welds • Continuous welded primary inlet duct to minimize leakage with three stiffening beads for added rigidity Heavy-Duty Construction • Damper construction of double layer 18 gauge equivalent with mechanically fastened integral blade seal Multi-Quadrant Averaging Flow Sensor • All metal constructed inlet flow sensor with extra balancing taps Galvanized Steel Casing • Galvanized steel casing, mechanically sealed for low leakage construction NEMA 1 Control Enclosure • NEMA 1 rated control enclosure...
Open the catalog to page 4
Dimensional Data MQTH-500 SINGLE DUCT AIR TERMINAL UNIT, COOLING ONLY Dimensional Data MQTH-500 Single Duct Air Terminal Unit, Cooling Only The standard location for control panel is Right Hand on Model MQTH. The control panel will overhang the top and bottom of model MQTH506 1" (25.4 mm). Control Panel Mounting Surface width by height is 13-7/8" × 9-3/4". Table 1: MQTH-500 Single Duct Air Terminal Unit, Cooling Only—Unit Dimensions, in. (mm) and Weights, lb. (kg) Model Number Inlet Size
Open the catalog to page 5
Dimensional Data MQTH-500 SINGLE DUCT AIR TERMINAL UNIT WITH HOT WATER COIL MQTH-500 Single Duct Air Terminal Unit with Hot Water Coil The standard location for control panel is Right Hand on Model MQTH. 1 The control panel will overhang 1 top and bottom of model MQTH506 1" (25.4 mm) the 9 1 5 7 21 Control Panel Mounting Surface width by height is 13-7/8" 7 9-3/4". × 37 124 10 254 8 20 Table 2: MQTH-500 Single Duct Air Terminal Unit with Hot Water Coil—Unit Dimensions, in. (mm) and Weights, lb. (kg) Model Number Inlet Size
Open the catalog to page 6
MQTH-500 SINGLE DUCT AIR TERMINAL UNIT WITH ELECTRIC HEAT Dimensional Data MQTH-500 Single Duct Air Terminal Unit with Electric Heat The standard location for control panel is Right Hand on Model MQTH. Looking in the primary inlet, the control panel is on the right. The control panel will overhang the top and bottom of model MQTH506 1" (25.4 mm). Control Panel Mounting Surface width by height is 13-7/8" × 9-3/4". Table 3: MQTH-500 Single Duct Air Terminal Unit with Electric Heat—Unit Dimensions, in. (mm) and Weights, lb. (kg) Model Number Inlet Size Unit Weight
Open the catalog to page 7
Dimensional Data MQTH-500 SINGLE DUCT AIR TERMINAL UNIT WITH INTEGRAL ATTENUATOR MQTH-500 Single Duct Air Terminal Unit with Integral Attenuator The standard location for control panel is Right Hand on Model MQTH. The control panel will overhang the top and bottom of model MQTH506 1" (25.4 mm). Control Panel Mounting Surface width by height is 13-7/8" × 9-3/4". Table 4: MQTH-500 Single Duct Air Terminal Unit with Integral Attenuator—Unit Dimensions, in. (mm) and Weights, lb. (kg) Model Number Inlet Size Unit Weight
Open the catalog to page 8
Dimensional Data MQTH-500 SINGLE DUCT AIR TERMINAL UNIT WITH INTEGRAL ATTENUATOR MQTH-500 Single Duct Air Terminal Unit with Integral Attenuator and Hot Water Coil AND HOT WATER COIL The standard location for control panel is Right Hand on Model MQTH. The control panel will overhang the top and bottom of model MQTH506 1" (25.4 mm). Control Panel Mounting Surface width by height is 13-7/8" × 9-3/4". Table 5: MQTH-500 Single Duct Air Terminal Unit with Integral Attenuator and Hot Water Coil— Unit Dimensions, in. (mm) and Weights, lb. (kg) Model Number Inlet Size Unit Weight
Open the catalog to page 9
Performance Data Performance Data MQTH-500 AHRI Certified Rating Points Certifications and Standards • Units tested per ANSI/ASHRAE Standard 130 • All model sizes certified in accordance with AHRI 880 certification program • ETL listed to meet requirements of UL 1995 and CSA 236 • Dual-density fiberglass insulation meets UL 181 and NFPA 90A requirements • Insulation meets ASHRAE 62.1 requirements for resistance to mold growth and erosion Table 6: MQTH-500 AHRI Certified Radiated Sound Power, ∆Ps = 1.5 in.wg Unit Size Octave Band Table 7: MQTH-500 AHRI Certified Discharge Sound Power, ∆Ps = 1.5...
Open the catalog to page 10
CAT 903 • AIR TERMINAL UNITS 12 www.DaikinApplied.com
Open the catalog to page 12
Performance Data Table 12: MQTH-500 Discharge Sound Power at ∆PS = 0.50, 0.75 and 1.0 in.wg Unit Size ∆Ps = 0.50 in.wg. (125 Pa Octave Band Sound Power, Lw, dB 2
Open the catalog to page 13
Performance Data Table 13: MQTH-500 Discharge Sound Power at ∆PS = 1.50, 2.0 and 3.0 in.wg. Unit Size ∆Ps = 1.5 in.wg. (375 Pa) Octave Band Sound Power, Lw, dB 2 ∆Ps = 2.0 in.wg. (500 Pa) Octave Band Sound Power, Lw, dB 2 ∆Ps = 3.0 in.wg. (750 Pa) Octave Band Sound Power, Lw, dB 2 CAT 903 • AIR TERMINAL UNITS 14 www.DaikinApplied.com
Open the catalog to page 14
Performance Data Table 14: MQTH-500 Minimum Pressures, in. wg. Unit Size 504/505 4 & 5 inch 506 6 inch 1. ∆Ps = static pressure drop; ∆Pt = total pressure drop. 2. Calculations of ∆Ps and ∆Pt were performed using standard air with a density of 0.075 lbm / cu.ft. 3. Data based on testing standard Daikin hot water coils per AHRI Standard 410. 4. Unit ∆Ps and Unit ∆Pt are pressure drops across the air terminal unit while the inlet damper is in the wide-open position. 5. Data applies to air terminal units with hot water coil mounted on the discharge side. 6. “ —” is shown when the static pressure...
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