Install Instructions

AMX300 SERIES
© 2020 Resideo Technologies, Inc. All rights reserved.
This product is manufactured by Resideo Technologies, Inc. and its affiliates.
www.resideo.com
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
62-3112—12 M.S. Rev. 03-20 | Printed in United States
To clean or replace the lower assembly, shut off the water
supply and:
1. With a screwdriver, remove the screw and the
handwheel.
2. Unscrew the lower nut (turn it counterclockwise) to
remove the top assembly. The brass top assembly will
pop up.
3. Remove the lower assembly, diffuser, and spring.
WARNING
Do not use solvents or scratch the metallic or Teflon
®
coated surfaces.
4. Carefully remove any scaling (calcium deposits) or
foreign particles from the valve seat and other internal
parts. Use vinegar to remove the calcium deposits.
Soak parts until the calcium deposits become soft
enough to be scrubbed and washed off.
5. Replace the clean spring, diffuser and lower assembly
following the instructions below or use a new
replacement kit assembly.
a. Insert the spring into the diffuser.
b. Insert the diffuser with the spring end first into the
body.
c. Fit the valve top assembly into the lower assembly
and insert into the valve.
d. Tighten the lower nut.
e. Tighten the upper nut.
6. Place the handwheel on the valve.
7. Screw the handwheel onto the valve.
8. Push down and turn the handwheel to set the desired
temperature.
NOTE: The AMX300LF (lead free) includes an optional “C”
clip that can be installed to prevent further
adjustment of the temperature. See Fig. 8 for
installation location.
Notice: The optional “C” clip is designed to be very
difficult to remove after it has been installed. Install
it only after the desired output temperature setting
is achieved.
NOTE: Additional thermostrips are available from Resideo
in packs of 10 (TS205-064).
Fig. 6. Expanded view of the AMX300 Series Mixing Valve.
Fig. 7. Pressure Drop Chart.
Fig. 8. ”C” clip installation location.
M31029A
VALVE BODY
PLUG
SPRING, AQUAMIX-1
THERMAL ELEMENT
PLASTIC SPOOL
HANDWHEEL
FLAT SHOULDER SCREW
SPRING
SPINDLE ASSY
O-RING
DIFFUSER
CONTENTS OF
THERMOSTATIC
ELEMENT
REPLACEMENT
KIT AM-1-025RP
FLOW VERSUS PRESSURE DROP
PRESSURE
DROP
(PSI)
FLOW (GPM)
50
40
30
20
0
4
12
16
20
M29789A
MIXED
TEMPERATURE
OF 140°F (60°C)
60
10
0
2
8
6
10
14
18
MIXED
TEMPERATURE
OF 120°F (49°C)
MIXED
TEMPERATURE
OF 95°F (35°C)
M34986A