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Installation, operation and maintenance instructions

for design engineers, installation engineers and service personnel

SDHWM_d_EN–m

Swegon 

CASA

®

 

Air heater/cooler 

in combination with ground source heat pump

Products

For 250 mm duct; SDHW 250F 

(LVI nro. 7906808)

•  CASA W2504F air heater/cooler, fully insulated
•  SET connection unit
•  Temperature sensor, cable length 3 m
•  Wall / ceiling mounting bracket
•  Coarse filter

NOTE! The manual’s original language is English.

General Description

Outdoor air duct mounted heating / cooling unit. 

In the winter the unit heats the air taken in and ensures 
that the ventilation unit operates with the greatest effi-
ciency even in extreme cold. 

In the summer, the medium in the ground circuit is used 
to cool the building. 

Planning

Take into account the duct battery’s capacity for the 
established airflows when sizing the depth of the ground 
source heating well (see Technical data). Take the pressure 
loss caused by the duct battery into consideration when 
sizing the airflows.
The duct battery must always be mounted horizontally, 

so that condensate which is formed is led to a drain as 

planned.
Reserve at least 500 mm servicing space at the sides of the 

unit.

Accessories

•  Condensate hose: 502130

Summary of Contents for CASA SDHW250F

Page 1: ... cooling unit In the winter the unit heats the air taken in and ensures that the ventilation unit operates with the greatest effi ciency even in extreme cold In the summer the medium in the ground circuit is used to cool the building Planning Take into account the duct battery s capacity for the established airflows when sizing the depth of the ground source heating well see Technical data Take th...

Page 2: ...lanning to the effect of the duct battery Ensure that the ground source heating well cannot freeze on account of the duct battery being added to the system Supplement with the necessary protection Commissioning The duct connection spigots of the unit must be capped during transport storage and installation Make sure that the unit and the ducts are clean and that there are no loose objects in them ...

Page 3: ...harge The discharge hose is connected to the condensate out let G3 8 The condensate is led off to a floor drain or the like using a hose with an inner diameter of at least 12 mm The condensate hose 502130 is available as an accessory The hose must not be led off directly to the drain There must not be two water traps or a horizontal section on the condensate hose The damming height of the water tr...

Page 4: ...rature sensor 4 SET connection unit 5 Heat pump 6 Solenoid valve 7 Circulation water pump 8 Vent valve 9 Power source 24 VDC 10 Operating switch for the circula tion water pump ON OFF Not included in the delivery NOTE If the SET module is used for 230 VAC control the module must be installed according to the electri cal safety directives in a separate enclosure NOTE Make sure that the strain relie...

Page 5: ...m operating time has been established for the heating medium pump s control 10 minutes Limit value cooling Select the required start temperature for external pre cooling When the outdoor temperature transferred outside temperature measured before the air heater cooler rises above the limit value the relays in the SET unit selected for the heat medium pump are activated The operating signal is rece...

Page 6: ...6 SDHWM 210119 Swegon reserves the right to make changes www swegon com Dimensions Leave at least 50 cm service space in front of the door 479 425 381 350 250 477 22 22 22 22 ...

Page 7: ...velocity m s 0 3 0 3 0 4 0 4 0 5 Fluid s pressure loss kPa 5 9 7 9 8 7 10 0 10 6 Pipe connection DN 25 25 25 25 25 The unit s function for use as a preheater has been sized with 28 ethanol Air heater cooler s performance data Cooling Capacity kW 0 8 1 2 1 4 Air flow l s 40 100 150 INCOMING AIR Temperature C 25 25 25 Relative humidity 55 55 55 OUTGOING AIR Temperature C 13 17 18 Relative humidity 9...

Page 8: ......

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