Honeywell Thermostatic Mixing Valve Installation Guide
AM-1 SERIES™
3
62-3075EFS—05
supply to provide mixed tempered water to connected
fixtures. This provides constant water temperature under
different working conditions.
fixtures. This provides constant water temperature under
different working conditions.
MAINTENANCE PROCEDURES
Hard water conditions may result in scale deposits,
causing binding of internal parts in extreme cases.
Cleaning the internal parts will usually restore the valve to
proper operating conditions. In some cases, it may be
necessary to replace the lower assembly.
causing binding of internal parts in extreme cases.
Cleaning the internal parts will usually restore the valve to
proper operating conditions. In some cases, it may be
necessary to replace the lower assembly.
To clean and/or replace the lower assembly, shut off water
and:
and:
1.
With a screwdriver, remove screw and handwheel.
2.
Loosen upper nut (do not remove) to allow engaging
an adjustable wrench on lower nut. Unscrew lower
nut (counterclockwise). This removes top assembly.
an adjustable wrench on lower nut. Unscrew lower
nut (counterclockwise). This removes top assembly.
3.
Brass top assembly will pop up. Remove lower
assembly, diffuser and spring.
assembly, diffuser and spring.
4.
Carefully remove any scaling (calcium deposit) or
foreign particles from valve seat and other internal
parts. Use vinegar to remove calcium. Soak parts
until calcium becomes soft and can be scrubbed and
washed off. Do not use solvents or scratch metallic /
Teflon
foreign particles from valve seat and other internal
parts. Use vinegar to remove calcium. Soak parts
until calcium becomes soft and can be scrubbed and
washed off. Do not use solvents or scratch metallic /
Teflon
®
coated surfaces.
5.
Replace cleaned spring, diffuser and lower assembly
following instructions below or use new replacement
kit assembly. For correct kit number, see Table 1.
following instructions below or use new replacement
kit assembly. For correct kit number, see Table 1.
Install spring, diffuser and lower assembly:
A.
Insert spring onto diffuser.
B.
Insert diffuser with spring end first into body.
C.
Fit valve top assembly into lower assembly and insert into valve.
D.
Tighten lower nut.
E.
Reposition handwheel and insert screw. Turn handwheel to
desired temperature setting.
Fig. 3. AM-1 Series valves assembly.
Fig. 4. Dimensions in in. (mm).
M23941
LOWER ASSEMBLY
HANDWHEEL
DIFFUSER
SPRING
VALVE BODY
TOP ASSEMBLY
LOWER NUT
UPPER NUT
O RING
RETAINING RING
C
H
MIX
H
Table 1. AM-1 Series Replacement Kits
Model
Temperature Range
Part No.
C
70°–120° F (21°–49°C)
AM-1-020 RP
STD
70°–145° F (21°–63° C)
AM-1-025 RP
M23938
MIX
H
C
B
C
2-1/4
(57)
A
Ø 1-51/64
(46)