Pentair FNS Plus FNSP 36 User Manual

Rev. G 6-27-03 1 P/N 190033
FNS
®
Plus Vertical Grid D.E. Filter Owner's Manual
SECTION I. FILTER INSTALLATION.
A. GENERAL INFORMATION.
1. The filter should be mounted on a level concrete slab. Position
the filter so that instructions, warnings and the pressure gauge
are visible to the operator. It also should be positioned so that
the piping connections, control valve and drain port are
convenient and accessible for servicing and winterizing.
2. Install electrical controls (e.g., on/off switches, timers, control
systems, etc.) at least five (5) feet from the filter. This will
allow you enough room to stand clear of the filter during
system start up.
3. Allow sufficient clearance around the filter to permit visual
verification that the clamp is properly installed around the tank
flanges, see Figure 1.
a. Tap the clamp with a mallet or similar tool to ensure uniform
loading during clamp tightening.
IMPORTANT SAFETY INSTRUCTIONS
READ AND FOLLOW ALL INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Table of Contents
SECTION I. FILTER INSTALLATION. .......................................................................................... 1
SECTION II. FILTER OPERATION. ................................................................................................ 2
SECTION III. TROUBLE SHOOTING. ............................................................................................. 8
SECTION IV. TECHNICAL DATA. ............................................................................................. 9-10
WARRANTY ............................................................................................................... 11
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.
WARNING
Before installing this product, read and follow all warning notices and instructions accompanying this filter. Failure to follow
safety warnings and instructions can result in severe injury, death, or property damage. Call (800) 831-7133 for additional free
copies of these instructions.
Figure 1.
Pentair Pool Products
1620 Hawkins Ave., Sanford, NC 27330 • (919) 774-4151
10951 West Los Angeles Ave., Moorpark, CA 93021 • (805) 523-2400

Pentair FNS Plus FNSP 36 Specifications

General

Model	FNS Plus FNSP 36
Filter Area	36 sq. ft.
Number of Filter Elements	7
Manufacturer	Pentair
Max Working Pressure	50 PSI
Air Relief Valve	Yes
Warranty	1 year
Type	Diatomaceous Earth Filter
Inlet/Outlet Size	1.5 in
Drain Connection	1.5 inches

Summary

SECTION I. FILTER INSTALLATION

SECTION II. FILTER OPERATION

A. GENERAL INFORMATION.

Provides general information about how the filter operates, including pressure limits and DE usage.

B. CLAMP INSTALLATION INSTRUCTIONS.

Detailed instructions for correctly installing the filter clamp to prevent lid blow-off.

C. SYSTEM RESTART INSTRUCTIONS.

Steps to safely restart the filter system after servicing or maintenance.

D. COATING THE FILTER ELEMENTS WITH DIATOMACEOUS EARTH.

Guidance on applying diatomaceous earth to filter elements for optimal performance.

E. PREPARING DIATOMITE.

Instructions for preparing the diatomaceous earth (diatomite) mixture for precoating.

H. CLEANING FILTER ELEMENTS.

SECTION III. TROUBLESHOOTING

A. AIR ENTERING YOUR FILTER IS DANGEROUS.

Warning and identification of dangers related to air entering the filter system.

B. LIMING-UP.

E. PRESSURE DROPS ON GAUGE.

F. PRESSURE REMAINS HIGH AFTER BACKWASH.

H. DIATOMITE IS CONTINUOUSLY ENTERING THE POOL.