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7-4. How to select DX COIL Design Guideline
How to select DX COIL Design
Confi rm with AHU's
Heating use]
AHU Operating
mode
[Cooling Only use]
or [Cooling &
Heating use]
[Cooling only use]
1) Cooling mode coil "Air On" Temp : [59-75°F WB]
1) Cooling mode
2) Evaporator Air Suction Temp : [80°F DB / 67°F WB]
coil "Air On" Temp
and
2) Evaporator Air
Suction temp.
(Design temp)
1) Cooling mode coil "Air On" Temp : [59-90°F WB]
and
2) Evaporator Air Suction Temp : [91°F DB/82°F WB]
AHU / DX COIL Design Notes:
Cooling & Heating output fi gures are based on calculations and "general" test data. All fi gures are to be taken as
approximations. The properties of the 3rd Party DX COIL will have an effect on the performance of Outdoor units.
• For the AHU/DX COIL prepared on site, please design with referring to submittal of AHU.
• The DX COIL must be suitable for R410A.
• The design should allow operation an Evaporator and a Condenser depends on selected usage.
(Features: Multiple circuits / Liquid Capillary Distributor / Gas Header)
• The counter flow principle must be observed for the DX COIL Design.
• A Drain Pan must be fitted (even if only used in Heat mode) due to defrost cycles.
[Cooling
&
Desired
application to
control by RA or
discharge air?
and
TA system can mix with VRF FCU
(only RBM-A0601UPVA-UL or
RBM-A1201UPVA-UL)
RA
Guideline HP
discharge air
Guideline TF
Guideline CO - Pattern A
Guideline CO - Pattern B
– 27 –
Application (type)
TA or DDC
TF or DDC
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