Milton Roy mROY Instruction Manual

®

mROY
Pneumatic Capacity Control

Instruction Manual

Manual No. : 53871
Rev. : 0
Date : 05/2019

1 Rev.

PRECAUTIONS

For Pumps with PVC & 316SS Liquid Ends
WHEN USED IN SWIMMING POOLS OR SPAS/HOT TUBS (ANSI/NSF 50)

Caution on Chemical Concentration:

There is a potential for elevated chemical concentration during periods of no ow, for
example, during backwash in the system. Steps, such as turning the pump off, should be
taken during operation or installation to prevent this. Contact your sales representative or
distributor about other external control options to help mitigate this risk.

Flow Indicating Device:

To ensure operation of the pump it is recommended that some type of ow indicating device
be installed to measure water ow rates and be appropriate for the output of the pump.
Contact your distributor or sales representative for further information.

Head Loss / Over Pressure Protection / Back Pressure-Anti-Siphon Valve:

• Milton Roy metering pumps are positive displacement. Head loss is not applicable to the
pump.

• To ensure safe operation of the pump it is recommended that some type of safety/pressure
relief valve be installed to protect the piping and other system components from failing due
to excessive pressure.

• If you are pumping downhill or into low or no system pressure, a back pressure/anti-siphon
device should be installed to prevent over pumping or siphoning. Contact your distributor or
sales representative for further information.

Additional Operation and Installation Instructions for 316SS or PVC Liquid Ends:

• Application of this pump to swimming pool/spas only evaluated to NSF/ANSI 50.

• There is a potential for elevated chemical concentration during periods of no ow, for
example, during backwash in the system. Steps, such as turning the pump off, should be
taken during operation or installation to prevent this. See your sales representative or
distributor about other external control options to help mitigate this risk.

• Liquid Compatibility CAUTION: Determine if the materials of construction included in the
liquid handling portion of your pump are adequate for the solution (chemical) to be pumped.
ALWAYS wear protective clothing, face shield, safety glasses and gloves when working on
or near your metering pump. Additional precautions should be taken depending on the
solution being pumped. Refer to MSDS precautions from your solution supplier. Reference a
Milton Roy Material Selection Chart for aid in selecting appropriate material of construction
for uids of your specic metering pump. Contact your sales representative or distributor for
further information.

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TABLE OF CONTENTS

SECTION 1 - PNEUMATIC CAPACITY CONTROL................................................ 5

SECTION 2 - DISASSEMBLY AND ASSEMBLY PROCEDURE ......................................7

2.1 DISASSEMBLY ..................................................................7

2.2 ASSEMBLY .....................................................................7

2.3 CALIBRATION AFTER ASSEMBLY................................................... 7

SECTION 3 - GENERAL PERFORMANCE...................................................... 8

SECTION 4 - OPERATING SPECIFICATION .................................................... 9

SECTION 5 - TABLE OF EQUIVALENTS ...................................................... 11

LIST OF ILLUSTRATIONS

FIGURE 1. Assembly Pneumatic Capacity Control ................................................ 10

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