Midea MRCT-062CWN1-R(C), Техническое руководство

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Rooftop ClimaCreator series DM16‐01.01.27en
Service manual 79
Blower drive options
Model
Motor Blower
HP rpm
Pulley pitch Dia.
(inch)
Fan speed
range (rpm)
Pulley pitch Dia.
(inch)
Min. Max.
MRCT-085CWN1-R(C) 2 1,400 4.53~5.25 821 918 8.35
MRCT-100CWN1-R(C)
2 1,400 4.53~5.25 931 1,016 7.48
MRCT-125CWN1-R(C) 4 1,420 4.53~5.25 769 871 8.82
MRCT-150CWN1-R(C) 5.3 1,440 4.53~5.25 949 1,112 7.48
MRCT-175CWN1-R(C)
5.3 1,440 4.53~5.25 927 1,045 9.84
MRCT-200CWN1-R(C) 5.3 1,440 4.53~5.25 1,081 1,284 5.91
MRCT-250CWN1-R(C) 7.3 1,440 4.53~5.25 925 1,088 7.09
MRCT-300CWN1-R(C) 7.3 1,440 4.53~5.25 1,022 1,195 6.30
E
xample for selection process:
The following data are the rated design points for MRCT-085CWN1-R(C) rooftop packages:
Air flow = 3520CFM; External static pressure = 0.3in.w.g; Fan speed = 862rpm;
Power input = 1405W; The No. of turns = 1N.
To increase the ESP (External Static Pressure) to 0.4in.w.g, but maintain the airflow rate at 3500CFM,
please follow the steps below:
Step 1: Selection of new desired point.
From the table data, select the point that can meet both of the requirements.
ESP = 0.4in.w.g;
Air flow rate (Near or equal to) ≈ 3500CFM.
Step 2: Read fan speed, power input:
Air flow = 3483CFM;
Fan speed = 896rpm;
Power input = 1400W.
Step 3: Read number of turns for variable pitch pulley.