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Type QLI

Type QLI

Type QLI

Product catalog summary
Description
The QLI induction type displacement flow diffuser with a water coil is designed for air/water air-conditioning systems. It combines low-turbulence air distribution with the energy efficiency of water cooling. The system uses a circular duct with nozzles to supply primary fresh air, while secondary air from the room is cooled or heated through a water coil before mixing with the primary air.

Construction, Dimensions, and Materials
The diffuser consists of a housing with a perforated discharge plate, a primary air duct with nozzles, and a water coil. It is available in 2-pipe or 4-pipe variants for cooling and heating. The housing and discharge plate are made of galvanized steel, with options for powder coating. The coil is made of copper pipes with aluminum fins.

Installation
The diffuser can be mounted on walls or floors, with optional brackets for fixing. It is suitable for perimeter wall installation under windows and can be customized to match interior decor. Minimum distances for installation must be observed to ensure proper function.

Nomenclature
Key parameters include temperature differences between room air, primary air, and water flow, as well as pressure drops and volume flow rates for both air and water. These parameters are critical for calculating the cooling and heating capacities of the system.

Performance Overview and Technical Data
The document provides reference values for cooling and heating operations, including room and water temperatures, and flow rates. Correction factors for water volume flow rates are also provided.

Order Details
The specification text outlines the components and options available for the QLI diffuser, including nozzle sizes and the presence of a condensate tray. Order codes are provided for specifying product configurations, including pipe systems, nozzle options, and mounting preferences.
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Catalog excerpts

Type QLI-1

Induction Type Displacement Flow Diffuser Type QLI With Water Coil TROX GmbH Heinrich-Trox-Platz D-47504 Neukirchen-Vluyn

 Open the catalog to page 1
Type QLI-2

Contents · Description Description ______________________________________ Construction ·Dimensions · Materials _______________ Installation _______________________________________ Nomenclature ____________________________________ Performance Overview · Technical Data _____________ Technical Data (Water) ____________________________ Order Details ____________________________________ Air flow pattern: Cooling operation Air flow pattern: Heating operation without primary air Air flow pattern: Heating operation with primary air Description QLI induction type displacement flow diffusers with water...

 Open the catalog to page 2
Type QLI-3

Constuction ·Dimensions · Materials Construction The induction type displacement flow diffuser QLI with water coil consists of the housing incorporating a discharge perforated plate with circular holes and a primary air duct with integral discharge nozzles (different nozzle sizes are available) and the primary air spigot. The integral water coil can be a 2-pipe variant for connection to the chilled or hot water supply or a 4-pipe variant for connection to the chilled and hot water supply. On request, the units can be delivered with condensate tray, wall mounting bracket and/or floor fixing bracket....

 Open the catalog to page 3
Type QLI-4

Installation Installation options Type WHR/L Type WVR/L Type WVR/L (Water connection right or left) (Water connection right or left) (Water connection right or left) Covering case (by others) Covering case (by others) Covering case (by others) Wall fixing (by others) Wall fixing bracket Floor fixing bracket Floor fixing (by others) Floor fixing Welded studs for wall and/or floor fixing On request, 2 wall and/or floor fixing brackets and screws can be supplied.

 Open the catalog to page 4
Type QLI-5

in K: Temp. diff. between room air tR and core tL in K: Temp. diff. between room air and primary air in K: Temp. diff. between flow and return water tWRK tWVH ∆tRWV in K: Temp. diff. between room air and water flow temperature ∆pt in Pa: Primary air pressure drop ∆pW in kPa: Water pressure drop in °C: Water flow temperature – cooling in °C: Water return temperature – cooling in °C: Water flow temperature – heating tWRH in °C: Water return temperature – heating tPr : Correction factor water volume flow rate Watt: Water heating capacity Watt: Water cooling capacity Watt: Total cooling/heating capacity...

 Open the catalog to page 5
Type QLI-6

Performance Overview · Technical Data with 2-pipe / 4-pipe system Reference values cooling Reference values heating tR = tWVK = ‡WK = ∆tPr = ∆tRWV = Nozzle type . . ∆PW QS = Qges (Water) (Water) kPa Watt . . ∆PW QS = Qges (Water) (Water) kPa Watt

 Open the catalog to page 6
Type QLI-7

20 18 Water pressure drop ∆pW in kPa Diff. between flow and return water temp. ∆tW in K Technical Data (water) 2- und 4-Leiter2- and 4-pipe Ausführung system Kühlen Cooling 4-Leiter4-pipe Ausführung system Heizen Heating 80 100 120 140 160 180 200 220 240 260 Wasservolumenstrom WK / / WH in l/h Water volume flow rate ‡‡WK ‡‡WH in l/h Correction factors (FW) water volume flow rate See also our selection programme for air-water systems on the internet at www.trox.de

 Open the catalog to page 7
Type QLI-8

Order Details Specification Text QLI induction type displacement flow diffuser with water coil for wall or floor mounting, giving low-turbulence air discharge, comprising the housing with primary air duct and a non flammable circular duct with punched nozzles, which are available in three different sizes. On request, the units can be supplied with condensate tray. Housing and discharge perforated plate are made of galvanised steel sheet, the primary air duct with integral discharge nozzles is made of steel sheet. The water coil can be used for cooling or heating operation (2-pipe system) and...

 Open the catalog to page 8

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.