Rev. B 7-30-10
1
P/N 370018
www.pentairpool.com or www.staritepool.com
Flowmeter Installation Instructions
(for LDF 300 Series)
Important Notice
Attention Installer.
This manual contains important information about the installation, operation and safe use
of this product. This information should be given to the owner/operator of this equipment.
Call (800) 831-7133 for additional free copies of this manual.
General
1. Pentair Flow meters should not be exposed to more than 240° F. and 150 PSI.
2. Only hand tightening is required on threaded nuts. No pliers or other tools should be used for any reason.
3. To obtain best possible reading, Flowmeter should be installed in an exact vertical plane with a
minimum of one foot of straight uninterrupted pipe on the upstream and downstream ends.
4. Proper pipe alignment is essential. Misalignment will put excessive stress on the Flowmeter.
5. Flowmeter models with threaded brass ends should
not
be connected to fittings with plastic female
threads as overtightening may crack the plastic fitting.
6. For solar applications, install Flowmeter on cool side of line.
CAUTION
The Polysulfone Flowmeter body is adversely affected by ultraviolet light. Therefore, complete care should be
taken to protect it from direct sunlight situations.
Failure to follow these instructions can result in damage
to the Flowmeter and/or property damage.
Installation
1. Remove brass or plastic Flowmeter ends and solder or thread them to pipe. Assemble body to ends
making sure both o-ring seals are in place and free of debris.
2. If installation is being made in an existing system, models with threaded ends should be engaged in
mating system fittings at both ends to determine length of pipe to be removed. Flowmeters with
solder connection ends will require removal of system tubing for a length equal to the total length of
the Flowmeter assembly
MINUS
1 in. This will allow ½ in. at each end for insertion of the copper
tubing into the Flowmeter ends.
CAUTION
If installation requires cemented plastic slip connectors on one side of the coupling, be sure to allow enough
time for the cement (or solvent) to dry and for the fumes to dissipate before the meter is installed. Crazing or
cracking may occur in the Flowmeter assembly if it comes in contact with incompatible materials or fumes.
See Flowmeter assembly illustration on page 2.
WARNING!
Improper installation of the Flowmeter can result in
damage to the Flowmeter and/or property damage
