DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 8: OPTIONAL HEATER CONFIGURATIONS 8.1 Distribution Duct
DualAir® units are designed to be connected to | The duct must be designed as described on Page | |||||
distribution and air inlet ducting. | 14, Section 8.1 and Figure 10 to ensure that there is | |||||
It is recommended that flexible duct connectors and/ | a homogenous air flow across the whole heat | |||||
or attenuators are used to reduce duct born noises. | exchanger. Failure to provide a properly distributed | |||||
It is recommended that the inlet ducting is arranged | air flow will reduce the life of the heat exchanger. | |||||
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with both fresh air and recirculating air dampers to | Contact | |||||
take advantage of the "free cooling" stage provided. | ||||||
Distribution ducting must be insulated to prevent | Department for recommendations regarding | |||||
heat gain during cooling mode. | duct resistance and design. Tel: +44 (0) 1902 | |||||
The air flow must be in the direction as stated for the | 494425 |
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version being installed with the heater at the |
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discharge end. |
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Figure 10: Ducting |
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NOTE: Duct size will be full size of inlet and outlet. |
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| Dimension | ||
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All joints between the heater and duct work should be |
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made as air tight as possible. |
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*Inlet Duct Minimum Dimension same as Outlet Duct |
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Twice |
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Minimum Dimension |
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Airflow Indicator |
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Ducting
Flexible Flange
14
