Zurn Wilkins ZW206 Installation And Maintenance Instructions Manual

Model ZW206
Solenoid Control Valve (4" and Larger)
Globe and Angle Pattern Bodies
Installation

Installation / Start-up
INSTALLATION
NOTE: Flushing of all pipe lines is to be performed to remove all debris
prior to installing valve.
1. For making adjustments and servicing allow for adequate space around
the valve before installing valve.
2. When installing a ZW206 valve, gate valves installed (a minimum of
one pipe diameter apart) on both inlet and outlet are recommended for
maintenance allowing for isolation of the valve.
3. Position the ZW206 in line matching the direction of flow as indicated on
the valve model tag with the proper direction of flow in the system. Once
attached to line, double check all fasteners/bolts in the pilot system and on
main valve are tight and there is no damage prior to pressurizing system.
NOTE: Pressure in some applications can be very high so be thorough
in checking and inspecting for proper installation and makeup.
4. Zurn Wilkins valves are designed to operate in both the vertical and
horizontal positions. However, it is recommended that ZW206 6" and larger,
be installation in the horizontal position. The horizontal positioning of the
larger valves avoids premature wear due to the mass of plunger assemblies
as well as allows for greater accessibility during annual inspections, and
maintenance.
5. Be sure to comply with all local and national electrical codes when
wiring the solenoid control.
START-UP
CAUTION: To prevent personnel injury and damage to equipment
check that downstream venting is adequate prior to start-up and test
procedures. All adjustments under pressure should be made slowly
while under flowing conditions. If the main valve closes too fast it
may cause surging in upstream piping.
1. Open isolation valves (2) in the pilot system (see ZW206 schematic).
2. Then slowly open the upstream shutoff valve only enough to fill main
valve assembly and pilot system. Prior to pressurizing the valve assembly
it is also recommended that a ZPI valve position indicator be installed to
aid in verifying proper valve movement.
3. As the valve is filling with water, it is necessary to bleed the main valve
and pilot system of air. To vent air, partially open or loosen the highest plugs
or fittings in the system. The ZPI valve position indicator is a great location,
as it has a test cock at the top to vent air pressure. It may be necessary to
bleed system more than once. After removal of air in the system tighten all
loose fittings.
NOTE: If valve is installed vertically, it will be necessary to loosen
some upper cover bolts until you have vented all the air from the
cover chamber.
4. If valve is equipped with speed controls (O or L on ZW206 schematic)
it is necessary to back out the set screw a minimum of 3 turns from initial
set point.
5. Next it is advisable to flow water through the valve to ensure all air has
escaped from system. It will be necessary to either energize or de-energize
the solenoid to open the valve depending on the option installed.
6. With the upstream shutoff valve partially open, slowly open the down-
stream shut off valve. Flow will begin to occur and pressure should build
up in valve and eventually stabilize.
7. Verify operation of the valve by energizing or de-energizing the solenoid
to open and close the valve.
!
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
!
ADVERTENCIA: Cáncer y daño reproductivo - www.P65Warnings.ca.gov
!
AVERTISSEMENT: Cancer et néfastes sur la reproduction - www.P65Warnings.ca.gov
®
Troubleshooting

1747 Commerce Way, Paso Robles, CA 93446 Phone:855-663-9876 Fax:805-238-5766
Maintenance Instructions

8. Once operation of the valve is verified, the speed controls if
installed can be set. When setting speed controls, turning the adjustment
screw into the speed control body will restrict the amount of flow through
the needle valve. Depending on whether the control is for opening or clos-
ing (refer to ZW206 schematic) the control will either slow the opening or
closing of the main valve when the adjustment screw is turned into the
speed control. Adjust as needed and tighten jam nut. In general a closing
speed control on a ZW206 should be at least 3 turns in from the furthest
open position to prevent high pressure surges upstream.
ZW206 NORMALLY CLOSED ZW206 NORMALLY OPEN
(ENERGIZE TO OPEN) (ENERGIZE TO CLOSE)
INLET OUTLET
3
SOL
ACL ACL
OUTLET
1 2
COVER COVER
4" - 16"
SCHEMATIC DIAGRAM
STANDARD COMPONENTS
1. Main Valve
2. 850MXL Isolation Valve
3. SXL Wye Type Strainer
4. PPV-SOL3 3-Way Solenoid Cntrl.
5. 3-Way Accelerator Pilot
Troubleshooting
OPERATION
The following troubleshooting information in Tables 1 & 2 deals strictly
with the ZW206 valve and pilot system. It is recommended to verify that
the pilot system is properly functioning before troubleshooting the main
valve. All troubleshooting can be performed without removing the cover.
It is also recommended to permanently install a model ZPI valve posi-
tion indicator and an additional gauge in one of the cover connections.
ACCL CONTROL
PILOT
3-WAY
3
INLET
SOL
INLET
1 2
OUTLET
SOL
OPTIONAL FEATURES
C 40XL Hydraulic Check
w/Isolation Valve
L SC1 Closing Speed Control
O SC1 or SC2 Opening Speed
Control
Z ZPI Visual Position Indicator
ZURN WILKINS
www.zurn.com
®
COVER
1