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Pr o v i s i on f o r coo l i ng ( „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 configuration CHP without a heating
coil
in position 30 to 43
and all rooftop units must be equiped with a droplet eliminator; dimension L2 applies to the
units.
MODIFICATIONS
Bas i c con f i gu r a t i on
Fans
Hea t r eco v e r y co r e
The compact unit consists of supply and exhaust centrifugal fans with electric motors in anti-vibration mounting,
removable counterflow air-to-air 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 hose. The unit casing consists of steel
frame and sandwich side panels made of painted aluminum sheets and filled with 22 mm of polyurethane insulation
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with thermal resistance R = 1,05 m KW , (rooftop units with insulation of 45 mm). The sandwich panels are fixed
to the frame. A front door enables easy access to all built-in components and filters.
Variety of 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, three-phase or special EC (DC)
energy-saving fans are available. All fans are direct-driven.
The only heat recovery core type made of plastic in counterflow arrangement with high efficiency.
D U P L E X – S – B A S I C U N I T
By - pass ( „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.
Individual modifications can be freely combined
Example:
S- (unit with a hot-water heating coil and a mixing damper)
S-
(unit with a hot-water heating coil and a DX coil)
S-
(unit with a hot-water heating coil, mixing damper, and provision for cooling) etc
DUPLEX- TC
DUPLEX- T-CHF
DUPLEX- TC-CHP
.
Ho t wa t e r hea t i ng co i l ( „ 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 e supply
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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.
Attention – the coil of rooftop units must always be protected against freezing by a water-glycol mixture.
Ch i l l ed wa t e r coo l i ng co i l ( „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 configuration CHP without a heating coil
in position 30 to 43
and all rooftop units must be
equiped with a droplet eliminator; dimension L2 applies to the units.
Mi x i ng dampe r ( „C“ )
Built-in opposed-blade damper including BELIMO 230 V actuator. It enables to mix fresh and stale (internal)
air in 0 to 100 % range. Along with a mixing damper the e shutoff damper without spring-return function must always
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be installed. Should the unit be equipped with a heating coil (DUPLEX -S-TC) and draft could occur in the duct system
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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. The damper is controlled by the unit control.
D i r ec t e xpans i on (DX) co i l ( „CHF “ )
A built-in coil made of copper pipes and aluminum fins, including a condensate pan with individual condensate drainage
and a pressure switch for freeze alarm. Three- or five-row coils 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 configuration CHF without a heating coil
in position 30 to 43
and all rooftop units must be
equiped with a droplet eliminator; dimension L2 applies to the units.
D U P L E X – S – M O D I F I C A T I O N D E S C R I P T I O N
Me.xxx; Mi.xxx
S.1058/1038.A
B.x
C.x
T.x
CHP
CHF.x
CHW.x
DUPLEX–S xxxx