Xylem MM 320C Series 851, 851 2 and 847 Make-up Water Feeders - Manual (Page 4)

MAINTENANCE
SCHEDULE:
• Disassemble and inspect annually. Replace the
water feeder if it is worn, corroded, or if
components no longer operate properly.
• Replace control every 15 years. More frequent
replacement may be required when severe
conditions exist such as surging water levels and
use of water treatment chemicals.
STEP 3 - Install the Piping
Strainer
Basket
Assembly
Swing Check Valve
By-pass
Hand By-Pass Valve
Connect to return
header on boiler
side of all valves
City Water
Supply
Supply To
Feeder
a. Follow the drawing to the right for piping the
valve to boiler and city water supply. When
piping the valve remember to leave room for
servicing the valve. This will aid in trouble-
shooting the valve and piping in the future.
Piping the Valve on Series 847 and 851
Piping the Valve on Series 851-S
Swing Check Valve
By-pass
Hand By-Pass
Valve
Connect to return
header on boiler
side of all valves
CAUTION
Before turning
on city water
pressure be
sure to open
this valve
City Water
Supply
Supply
Valve
Strainer
Basket
Assembly
a. Follow the drawing to the right for piping the
valve to the boiler and city water supply.
When piping the valve remember to leave
room for servicing the valve. This will aid in
troubleshooting the valve and piping in
the future.
• Disassemble and inspect the strainer screen
annually. Thoroughly clean the strainer screen
or replace.
• Remove and inspect cartridge annually.
Thoroughly clean by rinsing with clear water
or replace.
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.
© 2013 Xylem Inc. MM-320C July 2013 Part No. 210528