Application
Indoor compact unit ventilators of DUPLEX-S 1500 to 5600 series are used for comfort ventilation, as well as warm-air heating and cooling of small office areas, shops, retail facilities, school buildings, restaurants, small stores, sport centers, industrial halls and swimming pools.
The units are suitable for all facilities where effective ventilation or warm air circulation heating/cooling at minimum operating costs is required; it means high-efficient heat recovery, low power consumption of fans and minimum noise level.
The DUPLEX-S unit is designed as a compact appliance. In single casing it contains: two independently controlled centrifugal fans with anti-vibration motor support, high-efficient counterflow air-to-air heat recovery core assembled from thin plastic plates, removable supply and exhaust air filters of the G4 or F7 class, condensation pans, an optional internal by-pass with a remote-controled actuator and a mixing damper with an actuator.
The DUPLEX Unit Features DUPLEX-S
- high recovery efficiency of counterflow exchanger – up to 80 %
- highly compact shape enables space reduction up to 60 % compared to units with modular design
- nízké pořizovací náklady
- low purchase cost
- up to 32 installation configurations
- choice of non-standard connection ports (round or rectangular) on request
- very low noise level
- low weight
- low power input
- different types of complete built-in control systems based on application complexity; fully integrated into the unit
- high chemical resistence of the hPS exchanger
- hygienic design according to the VDI 6022 enabling easy cleaning
- optional delivery in disassembled state for inaccessible spaces
Capacity range
Complete capacity range of approx. 1000 to cca 5600 m3/h can be covered with combination of fans and heat recovery exchangers.
General description
Unit
The compact unit consists of supply and exhaust centrifugal fans with electric motors in anti-vibration mounting, removable counterflow heat recovery core assembled from thin plastic plates, removable G4 (or F7) supply and exhaust air filters, and a condensate pan with DN 32 flexible drain hose. The unit casing consists of steel frame and sandwich side panels made of painted aluminum sheets and filled with 22 mm with overal heat transfer coefficient U = 0,95 W/m2K.
The compact unit consists of supply and exhaust centrifugal fans with electric motors in anti-vibration mounting, removable counterflow heat recovery core assembled from thin plastic plates, removable G4 (or F7) supply and exhaust air filters, and a condensate pan with DN 32 flexible drain hose. The unit casing consists of steel frame and sandwich side panels made of painted aluminum sheets and filled with 22 mm with overal heat transfer coefficient U = 0,95 W/m2K.
Fans
Variety of direct-driven centrifugal fan types of different manufacturers can be used for each DUPLEX unit size. Fans differ in volume flow rate, available pressure, speed, sound level and power consumption. Single-phase or three-phase fans are available.
Variety of direct-driven centrifugal fan types of different manufacturers can be used for each DUPLEX unit size. Fans differ in volume flow rate, available pressure, speed, sound level and power consumption. Single-phase or three-phase fans are available.
Heat recovery core
The only heat recovery core type made of plastic in counterflow arrangement with high efficiency.
The only heat recovery core type made of plastic in counterflow arrangement with high efficiency.
Basic optional accessories
By-pass damper ("B")
By-pass of the plate heat recovery core on supply air side. By-pass consists of an opposed-blade damper and an actuator. It is fitted next to the recovery core inside the unit; it does not increase size of the unit.
The standard actuator is BELIMO 230 V; other types are available upon request.
By-pass of the plate heat recovery core on supply air side. By-pass consists of an opposed-blade damper and an actuator. It is fitted next to the recovery core inside the unit; it does not increase size of the unit.
The standard actuator is BELIMO 230 V; other types are available upon request.
Mixing damper ("C")
Built-in opposed-blade damper including BELIMO 230 V actuator. It enables to mix fresh and stale (return) air in 0 to 100 % range. Along with a mixing damper the e1 shutoff damper without spring-return function must always be installed. Should the unit be equipped with a water heating coil (DUPLEX-S-TC) and draft could occur in the duct system during power failure with the damper stuck open, it is necessary to install separate shutoff damper with spring-return function into the duct close to an air intake.
Built-in opposed-blade damper including BELIMO 230 V actuator. It enables to mix fresh and stale (return) air in 0 to 100 % range. Along with a mixing damper the e1 shutoff damper without spring-return function must always be installed. Should the unit be equipped with a water heating coil (DUPLEX-S-TC) and draft could occur in the duct system during power failure with the damper stuck open, it is necessary to install separate shutoff damper with spring-return function into the duct close to an air intake.
Hot-water heating coil ("T")
Built-in water-to-air three-row (possibly five-row) heating coil; made of copper pipes and aluminum fins. Designed for systems up to 110 °C and 1,0 MPa. The coil is standardly equipped with flexible connection and a steam-gas capillary thermostat for freeze protection. Units in modification T (with heating coil) must be equipped with e1 supply air shutoff damper; an actuator with spring-return function (BELIMO LF 230 V) is reccommended. A coil hydraulic kit for heating capacity control of R-TPO, R-TPO-3 or RS-TPO type can be supplied with the coil upon request.
Built-in water-to-air three-row (possibly five-row) heating coil; made of copper pipes and aluminum fins. Designed for systems up to 110 °C and 1,0 MPa. The coil is standardly equipped with flexible connection and a steam-gas capillary thermostat for freeze protection. Units in modification T (with heating coil) must be equipped with e1 supply air shutoff damper; an actuator with spring-return function (BELIMO LF 230 V) is reccommended. A coil hydraulic kit for heating capacity control of R-TPO, R-TPO-3 or RS-TPO type can be supplied with the coil upon request.
Provision for cooling ("CHP")
Provision for additional installation of cooling coil. This provision comprises space for the cooling coil and the condensate pan Attention - in case of additional cooling coil installation it is necessary to ensure safe access and a sufficient manipulation space. A ceiling-suspended unit must be taken down to install the coil. Additional coil installation is only possible for floor-standing horizontal and flat, ceiling-suspended, and rooftop configurations. Units in modification CHP without a heating coil and all rooftop units must be equiped with a droplet eliminator; dimension L2 applies to the units.
Provision for additional installation of cooling coil. This provision comprises space for the cooling coil and the condensate pan Attention - in case of additional cooling coil installation it is necessary to ensure safe access and a sufficient manipulation space. A ceiling-suspended unit must be taken down to install the coil. Additional coil installation is only possible for floor-standing horizontal and flat, ceiling-suspended, and rooftop configurations. Units in modification CHP without a heating coil and all rooftop units must be equiped with a droplet eliminator; dimension L2 applies to the units.
Direct expansion (DX) coil ("CHF")
A built-in coil made of copper pipes and aluminum fins, including a condensate pan with individual condensate drainage and a pressure switch. Three- or five-row coils with different evaporating temperature are chosen depending on capacity required, refrigerant type and air parameters. The DX coil can be equipped with accessories on request. Attention - units with the DX coil are only made in floor-standing horizontal and flat, ceiling-suspended, and rooftop configurations. Units in modification CHP without a heating coil and all rooftop units must be equiped with a droplet eliminator; dimension L2 applies to the units.
A built-in coil made of copper pipes and aluminum fins, including a condensate pan with individual condensate drainage and a pressure switch. Three- or five-row coils with different evaporating temperature are chosen depending on capacity required, refrigerant type and air parameters. The DX coil can be equipped with accessories on request. Attention - units with the DX coil are only made in floor-standing horizontal and flat, ceiling-suspended, and rooftop configurations. Units in modification CHP without a heating coil and all rooftop units must be equiped with a droplet eliminator; dimension L2 applies to the units.
Water cooling coil ("CHW")
A built-in coil made of copper pipes and aluminum fins, including a condensate pan with individual condensate drainage. Three- or five-row coils are chosen depending on capacity required, cooling medium type and air parameters. The cooling coil can be equipped with the R-CHW hydraulic kit on request. Attention - units with the cooling coil are only made in floor-standing horizontal and flat, ceiling-suspended, and rooftop configurations. Units in modification CHP without a heating coil in configurations 30 to 43 and all rooftop units must be equiped with a droplet eliminator; dimension L2 applies to the units.
A built-in coil made of copper pipes and aluminum fins, including a condensate pan with individual condensate drainage. Three- or five-row coils are chosen depending on capacity required, cooling medium type and air parameters. The cooling coil can be equipped with the R-CHW hydraulic kit on request. Attention - units with the cooling coil are only made in floor-standing horizontal and flat, ceiling-suspended, and rooftop configurations. Units in modification CHP without a heating coil in configurations 30 to 43 and all rooftop units must be equiped with a droplet eliminator; dimension L2 applies to the units.
Other optional accessories
Shutoff damper e1; i1
Shutoff dampers standardly fitted with BELIMO actuators are located in the air inlet port. They come with a different actuator type including spring return types.
Shutoff dampers standardly fitted with BELIMO actuators are located in the air inlet port. They come with a different actuator type including spring return types.
Hydraulic kits for water heating and cooling coilsThey are designed to control heating (cooling) capacity. It consists of a three-speed pump, two globe shutoff valves and connection pipes. Based on type they also include a mixing valve with an actuator (for a digital control), or a diverting thermostatic valve (for an electric control).
Flexible connections
Round and rectangular ports can be equipped with flexible connections upon request.
Round and rectangular ports can be equipped with flexible connections upon request.
Hingeless doors
When needed it is possible to deliver door without standard hinges, only with quick lockes or spring fasteners. It reduces the necessary manipulation space.
When needed it is possible to deliver door without standard hinges, only with quick lockes or spring fasteners. It reduces the necessary manipulation space.
Electric heating coil EPO-V
Separately supplied heating coil to be fitted into round or rectangular duct. Capacities and diameters can be found in respective catalogue sheets.
Separately supplied heating coil to be fitted into round or rectangular duct. Capacities and diameters can be found in respective catalogue sheets.
Double insulation
It is possible to increase polyurethane insulation to 45 mm thickness (R = 2,1 m2K/W).
It is possible to increase polyurethane insulation to 45 mm thickness (R = 2,1 m2K/W).
Delivery of diassembled unit
All units can be delivered dismantled on request. The unit is to be assembled by rivets and bolts directly on site, therefore the unit can be installed in inaccessible location.
All units can be delivered dismantled on request. The unit is to be assembled by rivets and bolts directly on site, therefore the unit can be installed in inaccessible location.
Hot water heating coil TPO
Separately supplied coil for installation into round duct. It is suitable for cramped locations, where it is impossible to put the coil inside the unit, as well as for rooftop units. The coil is standardly equipment with the steam-gas capillary thermostat.
Separately supplied coil for installation into round duct. It is suitable for cramped locations, where it is impossible to put the coil inside the unit, as well as for rooftop units. The coil is standardly equipment with the steam-gas capillary thermostat.
Spare filter textiles
Spare filter textiles in sizes depending on unit type. They are available in the filtration of G4 and F7 class.
Spare filter textiles in sizes depending on unit type. They are available in the filtration of G4 and F7 class.
Polarisation filters
Additional supply air filter (DYNAMIC), including 24 V transformer and spare filter textile.
Additional supply air filter (DYNAMIC), including 24 V transformer and spare filter textile.
Accessories for DX coil
It is possible to equip the DX coils with refrigeration circle components: expansion valve with nozzle (A), solenoid valve (B, C), sight glass (D), filter-drier (E), eventually with evaporating pressure controller.
It is possible to equip the DX coils with refrigeration circle components: expansion valve with nozzle (A), solenoid valve (B, C), sight glass (D), filter-drier (E), eventually with evaporating pressure controller.
Air filtration
All DUPLEX units can be equipped with supply air filtration of F7 class instead of standard G4 class. Pressure drop of the filter is then 50 to 100 Pa (clean filter) depending on air flow rate, unit type and dirt accumulated. Prefilters made of multilayer pulled metal can be supplied.
All DUPLEX units can be equipped with supply air filtration of F7 class instead of standard G4 class. Pressure drop of the filter is then 50 to 100 Pa (clean filter) depending on air flow rate, unit type and dirt accumulated. Prefilters made of multilayer pulled metal can be supplied.
Installation diversity
To install the units even in cramped spaces during both reconstructions and new constructions, the compact DUPLEX units are available in five basic configurations:
Floor-standing horizontal position
|
Floor-standing vertical position
|
Ceiling-suspended position
|
Floor-standing flat position
|
Upright position
|
Rooftop flat position
|
All positions are available in several port configurations, whereas each size has up to 160 options. For detailed information see the respective technical documentation.
In special cases, it is possible to supply units with completely atypical dimensions, "custom made". For detailed conditions contact the manufacturer.
Note: The above stated information is only for basic product introduction and are not intended as designing documentation. For detailed information, please download complete designing documentation.