Xylem MM 622B User Manual

Series FS4-3RP-T
Manual Testing

a) Place cover on flow switch making sure

the test lever is protruding through the
appropriate slot in the cover. Check to
make sure the lever doesn’t bind with
the cover as noted in figure 1.

b) Initiate fluid flow through the system.

Observe that the dependent boiler
device is being activated by the flow
switch to determine if the flow switch is
operating as required.

c) Turn off fluid flow to determine that the

dependent device changes state, returning
to its original condition.

d) Repeat steps b and c several times.

e) If system operation is correct, turn on

system fluid flow and push the manual
test lever down as shown in figure 2.
Observe the dependent device changing
state.

f) Release the test lever and observe the

system returning to its original state.

g) Repeat steps e and f several times to

test the flow switch and its dependent
device for proper operation.

If the flow switch does not operate properly
see troubleshooting section on the last page
of MM-601.

INSTRUCTION MANUAL

MM-622B

PUSH

TO

PUSH

TO

TEST

TEST

No Binding

Here

FLOWFLOW

Figure 1

FLOWFLOW

Figure 2

Xylem Inc.

8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.xyleminc.com/brands/mcdonnellmiller

McDonnell & Miller is a trademark of Xylem Inc. or one of its subsidiaries.
© 2012 Xylem Inc. MM-622B August 2012 Part No. 210293