Xylem MM 308D User Manual

Changing Flow Rate of

Series WFE and WF-U Uni-Match

Electric Water Feeder

OPERATION

Maximum water supply pressure 150 psi Maximum boiler pressure 15 psi Maximum water temperature 175˚F Maximum ambient temperature 100˚F

Boiler Size Rating Recommended Flow

BTUH Orifice Size GPM

INSTRUCTION MANUAL

MM-308D

UN IVE RSA L WAT ERF EED ER

WF-U -2 4

Ch ica go, IL U. S. A.

FEED

INDICATOR

MANUAL

FEED

Up to 250,000 BTUH 1

(Up to 1000 sq. ft. EDR)

250,000 to 500,000 BTUH 2

1000 to 2000 sq. ft. EDR (factory installed)

500,000 to 1,000,000 BTUH 4

2000 to 4000 sq. ft. EDR

CAUTION

WARNING

• Before using this product read and understand instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application, instal-

lation, and maintenance of plumbing, steam, and electrical equipment and/or systems in accordance with all applicable codes and ordinances.

• To prevent electrical shock, turn off the electrical power before making electrical connections.

WARNING

• To prevent serious burns, bleed off all pressure and let the boiler cool to 80˚F (27˚C) before opening any pipe.

Failure to follow this warning could cause property damage, personal injury or death.

Sizing Recommendations for Flow Orifices

INSTALLATION –

TOOLS NEEDED:

One (1) vise or pipe wrench and one (1) small screwdriver.

STEP 1 - Installing the New Flow Washer

a. Using a vise or pipe wrench, securely hold the valve

body (A). Remove the outlet fitting (B) and gasket (C).

IMPORTANT: To prevent damage to the water feeder and possible leaks, DO NOT damage body threads when removing flow washer.

b. Carefully, insert a small screwdriver into the orifice

of the flow washer (D) and pry it out of the body.

c. Select the desired flow washer by using the number

on the face of the washer (D).

Identification: Number 1 = 1 gpm

Number 4 = 4 gpm.

d. Insert the new flow washer in the valve body so that

the identification number faces the body (A), NOT the outlet fitting (B). Before assembling the outlet fitting (B), make sure that the flow washer is completely inserted into the body recess and lying flat.

e. Thread the outlet fitting (B) and gasket back into the

body (A). Securely tighten to approximately 35 lb•ft (47.5 N•m) of torque.

=1GPM

=4GPM

STEP 2 - Install the Water Feeder

a. Follow the installation instructions provided with the water feeder.

STEP 3 - Test the Water Feeder

a. Before leaving the installation, make sure the water feeder operates

properly and that the valve and fittings do not leak.

INSTALLATION COMPLETE

Xylem Inc.

8200 N. Austin Avenue Morton Grove, Illinois 60053 Phone: (847) 966-3700 Fax: (847) 965-8379 www.xyleminc.com/brands/mcdonnellmiller

McDonnell & Miller is a trademark of Xylem Inc. or one of its subsidiaries.