Zurn Wilkins 350XL Bedienungsanleitung

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Model 350XL LEAD-FREE*

Double Check Valve Assembly (1-1/4”- 2”)

*This product contains a weighted average lead content less than 0.25% for wetted surfaces.

*Meets the requirements of NSF/ANSI 61

INSTALLATION INSTRUCTIONS

CAUTION: Installation of Backow Preventers must be performed by qualied, licensed

personnel. The installer should be sure the proper device has been selected for the par-

ticular installation. Faulty installation could result in an improperly functioning device.

ZURN WILKINS Model 350XL Double Check Valve assemblies are for use on potable

water lines where a health hazard does not exist in the event of a backow situation.

Damage to the device could result wherever water hammer and/or water thermal expan-

sion could create excessive line pressure. Where this could occur, shock arresters, check

valves and/or pressure relief valves should be installed downstream of the device.

If installation is in a pit or vault, the Backow Preventer must never be submerged in

water because this could cause a cross-connection. Make sure that the pit or vault always

remains dry by providing ample drainage.

1. Before installing a Model 350XL Backow Preventer, ush the line thoroughly to

remove all debris, chips and other foreign matter. If required, a strainer should be

placed upstream of the Backow Preventer. CAUTION: Do not use a strainer in

seldom used emergency waterlines such as re lines.

2. -Provide adequate space around the installed unit so that the test cocks will be ac

cessible for testing and servicing.

3. Install valve at least 12 inches above surrounding ood level.

4. Always consult local codes for installation methods, approvals and guidance.

INDOOR INSTALLATION

Indoor installation is preferred in areas

that are subject to freezing conditions. All

the basic installation instructions apply to

such installations.

OUTDOOR INSTALLATION

The Model 350XL Backow Preventer may

be installed outdoors only if the device

is protected against freezing conditions.

Exposure to freezing conditions will result

in improper function or damage to the

device. The installation location must be

kept above 32°F. All the basic installation

instructions apply.

PLACING THE MODEL 350XL IN SERVICE

1. Start with both shut-off valves closed.

Slowly open the inlet shut-off valve

until the backow preventer is com-

pletely pressurized.

2. When the unit has been pressurized,

vent any trapped air by slightly open-

ing each of the four test cocks.

3. Slowly open the downstream shut-

off valve. The Model 350XL Double

Check Valve assembly is now in

service.

4. After the Model 350XL has been

properly installed, test the device (see

“TEST PROCEDURES”). If the device

fails the test, remove the rst and

second check valves and thoroughly

ush the device. Clean rubber and

seats of all debris and place unit back

in service.

VERTICAL INSTALLATION

Vertical installation is acceptable in ap-

plications where inlet and outlet piping are

owing vertically upwards. All the basic

installation instructions apply to such instal-

lations. Consult factory for approval status.

 Installation Testing Maintenance Instructions

DIRECTION OF FLOW

12" MIN.

30" MAX.

DIRECTION OF FLOW

OPTIONAL STRAINER

(MODEL SXL)

PROTECTIVE

ENCLOSURE

DIRECTION OF FLOW

1

ZURN WILKINS

1747 Commerce Way, Paso Robles, CA 93446 Phone: Fax:805-238-5766855-663-9876

®

www.zurn.com

®

! WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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