Rain Bird C+ SERIES Operation And Maintenance Manual
C+ SERIES
SELF CLEANING WATER FILTER
OPERATION & MAINTENANCE MANUAL
CONTENTS
Filter Basics
1
Installation Requirements
Flush Line 2
Hydraulic Piston 3
Couplings 2
Hydraulic Connections 3
2
Filter Performance
Backwash Cycle 4
Normal Operation 3
3
Flow & Pressure Requirements
5
Maintenance & Spare Parts
Shutdown 6
Periodic Maintenance 6
Spare Parts 7
Particle Remover 7
Hydraulic Piston 8
Startup 5
5
Installation & Wiring
2x C+ Series Filters in Parallel 10
C+ Series Filter 9
9
Warranty
11
Filter Basics
The Rain Bird C+ Series is a self cleaning screen water filter. The major components
include the Filter Housing (1), Coarse Screen Pre-Filter (11), Fine Screen Filter
Element (2), Particle Remover (3), Hydraulic Piston (8), and Backwash Valve
(12).
C+ SERIES FILTER - GENERAL LAYOUT
N3
SCREEN
SERVICE AREA
10 x 11.5
K3
SCREEN
SERVICE AREA
12 x 11.5
K1
N1
N1
INLET
N2
OUTLET
N3
FLUSH OUTLET
K1
HYD CONNECTION
K2
HYD CONNECTION
K3
HYD CONNECTION
K2
N2
C+ SERIES FILTER - ASSEMBLED VIEW
C+ SERIES FILTER - EXPLODED VIEW
1
11
4
5
1. FILTER HOUSING
2. FINE SCREEN
3. PARTICLE REMOVER
4. BUSHING
5. HOUSING SEAL
1
7
2
3
6
5
6
10
1
8
6. SCREEN O-RING
7. SPACER
8. HYDRAULIC PISTON
10. HOUSING CLAMP
11. COARSE SCREEN
1
Installation Requirements
C+ Series filters may be mounted directly on the inlet (N1) and outlet (N2)
flanges, and positioned in any orientation. Isolation valves should be installed at
the inlet and outlet, and a bypass valve should be installed between the flanges.
This will allow the filter to be taken offline without disruption to water flow.
C+ SERIES FILTER - INSTALLATION LAYOUT
FLUSH
Filter
Differential
Pressure
Gauge
INLET
Isolation
Valve
Bypass
Valve
Isolation
Valve
OUTLET
There should be adequate clearance around the filter to allow for easy
maintenance access, including a minimum of 24” from the back (piston side). The
minimum clearance on the front (cover) depends on the model. There must be
enough room to remove the coarse screen and fine screen periodically.
FLUSH LINE
The piping for the flush valve must have no backpressure. It is strongly
recommended to use oversized piping to accommodate this requirement. For a
1” valve, 1.5” or 2” pipe must be used.
To minimize backpressure on the flush line, it is also important to avoid elevation
gain in the flush line. Even a small elevation gain can reduce the filter’s ability to
perform an effective backwash cycle. If flush water must be transported to higher
elevation, it is recommended to pipe the flush line to a storage tank first, and then
pump out to higher elevation.
2
HYDRAULIC CONNECTIONS
Each flanged connection nozzle (N1 & N2) on the C+ filter has two ¼”
threaded couplings. One may be used to install a pressure gauge or other sensor
equipment. The other ¼” coupling will be used to connect hydraulic tubing from
the differential pressure switch to the filter. The high pressure line is fitted to the
inlet, and low pressure fitted to the outlet.
HYDRAULIC PISTON
The piston (8) is mounted on the flush end of the filter. ¼” tubing must be
installed from the fitting located on the back of the piston to the hydraulic
connection (K3) on the flush outlet (N3). A filter is installed on the hydraulic
tubing to protect the piston.
Filter Performance
NORMAL OPERATION
During normal operation of the filter, dirty water enters through the inlet and
passes through the coarse screen. Any abnormally large debris is caught here
and prevented from possibly damaging the fine screen or particle remover.
Water then travels down the center of the filter and is strained across the fine
screen. As water passes from inside the screen to outside, suspended particles
are trapped on the fine screen and continue to buildup, eventually creating a drop
in pressure at the outlet of the filter.
C+ SERIES FILTER - NORMAL OPERATION
This drop in outlet pressure is monitored by the differential pressure gauge,
which at seven PSID (pounds per square inch differential) sends a signal to the
controller to initiate a backwash cycle.
3
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