Watts T55-85MHP40 - Manual (Page 12)

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Outputs 100 MDC series
Determining Output for Dual Head Dual
Control Models
• The dial ring for adjustable pumps is marked
L-10; L=5%, 1-10 indicates 10% increments of
maximum output.
• The turndown ratio is 20:1.
• On the MDC models, the outer pump head
operates on a percentage of the inner head
(closest to the motor).
• Setting #10 on both pump heads will deliver the
pump’s maximum output and is the only time each
pump head will output the same amount.
Example Using 100MDC5
• Decide on the desired output for the inner head.
• Note the setting on the dial ring that represents the
desired output.
For example setting #4 = 40% of max output
In the 100MDC5 model, setting #4 = 20 GPD
• Repeat the above steps to calculate the output of the
outer head.
Using setting #3 in this example,
#3 = 30% of the inside head output
20 GPD x 30% = 6 GPD
In this example using pump model 100MDC5,
the output for the inside head would be 20 GPD
and 6 GPD for the outside head.