Performance Data; Unit Selection Procedure - McQuay MWM-G2W Technical Manual

MFCU_(ii)

Performance Data

Unit Selection Procedure

The cooling and heating capacities of the fan coil units can be determined by the Cooling Capacity Perfor-
mance Chart and Heating Capacity Performance Chart in the following pages based on nominal air flow at
standard water temperature. The total and sensible capacities must be adjusted as variables come in. A sample
of selection procedure is given as below:
Step 1
Determine type of fan coil units to be used, i.e. ceiling cassette (MCK-AW Series); ceiling exposed (MCM-DW
Series); etc.
Step 2
Select a tentative unit size based on cooling capacities at nominal air flow. Design entering air temperatures
and required water flows from cooling capacities chart (Page 59 - 102) or the nominal capacities ratings (Page
45 - 55) from standard specification.
Step 3
Determine the nominal unit cooling capacities for the unit selected. If the cooling capacities chart must be used,
the following information must be known :-
a) Design water temperature rise
b) Design entering water temperature
c) Design entering air dry bulb temperature
d) Design entering air wet bulb temperature
Example of how to read the cooling performance chart.
MCK050AW (ISO)
Performance Data
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