resideo Braukmann DirectConnect AMX300 User manual

INSTALLATION INSTRUCTIONS
62-3113-05
®
UPC
C®
Braukmann
AMX300 DirectConnect™
Mixing Valve Kits
Included in this box (see Fig. 1)
1. AMX300 thermostatic mixing valve (“A”)
2. Cold water tee (“B”)
3. Flexible metal connector (“C”)
4. Thermostrip (“D”)
5. AMX300 Mixing Valve Installation Instructions
(literature # 62-3112)
6. AMX300 Mixing Valve Kit Installation Instructions
(literature # 62-3113)
Fig. 1. Mixing valve kit contents.
Tools needed (not supplied)
1. Wrench
2. Pliers
Safety Definitions
These safety terms identify information you must read.
CAUTION
Indicates a hazardous situation which, if not avoided,
could cause bodily injury or property damage.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
GETTING STARTED
CAUTION
For the homeowner's comfort, safety and
convenience, it is recommended this mixing valve kit
be installed and serviced by a plumbing professional.
These instructions provide detailed instructions for
installation and maintenance of the mixing valve kit.
You must read these instructions carefully and
completely to ensure proper installation.
Safety Precautions
WARNING
Water inside the water heater is very hot and presents
a scalding hazard.
Water temperatures in excess of 120 ºF (49 ºC) can
cause severe burns. Explain this to homeowner and
emphasize the risks associated with adjusting the
mixing valve settings.
M38278
PIPE
THREADS
CONNECTOR
THREADS
CONNECTOR NUTS
CORRUGATED
SMOOTH
M29694B
Thermostrip Accuracy expires after MMMYYYY
110 43
112 44
114 46
116 47
118 48
120 49
122 50
124 51
126 52
128 53
130 54
132 55
134 56
136 57
138 58
140 60
ºF ºc

AMX300 DIRECTCONNECT™ MIXING VALVE KITS
62-3113—05 2
WARNING
Water inside the water heater is very hot and presents
a scalding hazard.
If the AMX300 mixing valve kit is being installed on a
water heater that is already operational, be careful
when draining the hot water supply lines in
preparation for connecting the mixing valve kit.
Setting Homeowner Expectations
Make sure the homeowners know what to expect from their
AMX300 mixing valve kit. Show the homeowner the
procedure for adjusting the AMX300 mixing valve if, in the
future, they are not satisfied with the temperature of the hot
water delivered to the fixtures in the house. Outline the
potential scalding hazard if the mixed water temperature is
set too high and answer any questions the homeowner may
have.
Recommend to the homeowner that the mixing valve kit be
checked annually to ensure it continues to operate correctly.
These installation instructions must be left with the
homeowner for future reference.
WARNING
Compliance to ASSE 1017 code requires installation
of a check valve. An expansion tank must be installed
with the check valve to accommodate thermal
expansion.
Important Installation Requirements
Follow professional safety standards and all local
regulations. Consult local plumbing codes prior to installing
the AMX300 mixing valve kit.
PREPARATION FOR
INSTALLATION
The following steps should be taken to ensure proper
conditions for operation:
1. Check the operating conditions (temperature, pressure
and flow rate) of the system where the mixing valve kit
will be installed and ensure they do not exceed the
specifications of the mixing valve (refer to literature #
62-3112, AMX300 Series DirectConnect™ Mixing Valve
Installation Instructions). All specifications must be
met before installing the mixing valve kit.
2. If the water supply is of poor quality, the internal com-
ponents may jam requiring an additional filter or
strainer to be fitted to the system. Contact a plumbing
professional for appropriate materials and installation.
3. This mixing valve kit MUST NOT be subjected to heat
during installation as this may damage the internal
components.
CAUTION
Applying heat to these valves can damage the mixing
valve's internal components, causing it to not
regulate the mixed water temperature properly.
If using sweat fittings to connect the mixing valve kit
to the plumbing system, DO NOT apply heat to the
mixing valve after it is connected to the water heater.
Sweat the copper tubing of the plumbing system to
the threaded adapter before connecting the adapter
to the mixing valve.
4. The valve MUST NOT be allowed to freeze. If the mixing
valve kit is installed in a location where freezing could
occur, suitable insulation must be used to prevent
damage.
5. DO NOT use excess thread sealant (in liquid, tape or
other form) on the NPT threads, as this may cause the
mixing valve kit to fail; ensure that thread sealant does
not get into the internal parts of the mixing valve kit. Do
not use ANY thread sealant on flare connections of the
flexible metal connector.
6. When installing the AMX300 mixing valve kit on a water
heater with a blower mounted on top, the blower unit
must be removed prior to installation of the mixing
valve kit and replaced after the kit is installed. If the
water heater is gas-fired, the mixing valve kit must be
connected to the water heater before the draft hood is
installed. When installing an AMX300 mixing valve kit
on an existing water heater, it may be necessary to
remove the draft diverter and some of the vent sections
before installing the AMX300 mixing valve kit.
7. The AMX300 mixing valve kit is intended for use ONLY
on water heaters in potable water systems. It must
never be installed on a water heater that has previously
been used with a non-potable water heating system,
due to the potential for contamination from toxic mate-
rials used in theses types of systems (e.g. boiler treat-
ment chemicals).
8. Remove all components from the AMX300 mixing valve
kit box and check that all required components are
included. The required components are: AMX300 mix-
ing valve, cold water tee, flexible metal connector, ther-
mostrip and installation instructions (see Fig. 1).
9. The AMX300T kit includes a flexible metal connector
suitable for water heaters with an 8-in. spacing
between the hot and cold water nipples on top of the
tank. The AMX302T includes a flexible metal connector
suitable for water heaters with an 11-in. spacing.

AMX300 DIRECTCONNECT™ MIXING VALVE KITS
362-3113—05
WATER CONNECTIONS
The AMX300 mixing valve has an integral 1/2-in. FNPT
Alternate Hot Water outlet port (marked with an embossed
“AH” on the body of the valve) that draws unmixed, very hot
water from the tank. Use of this port is optional and should
be used if very hot water is needed at specific fixtures
(laundry, dishwasher, etc.). It also has an integral 1/2-in.
FNPT recirculation inlet port (marked with an embossed “R”
on the body of the valve) which can be connected to a
domestic hot water recirculation loop. The return line from
the recirculation loop must have a check valve installed to
prevent reverse flow from the water heater to the fixtures
(refer to literature # 62-3112, AMX300 Series DirectConnect™
Mixing Valve Installation Instructions). Refer to Fig. 2 and 3
for descriptions and locations of the inlet and outlet ports on
the mixing valve and cold water tee.
Fig. 2. Mixing valve connections.
Fig. 3. Cold water tee connections.
WARNING
Do not return recirculation loop to any other location
other than “R” inlet of the mixing device.
If recirculation loop water is returned to the water
heater at any location other than the optional
recirculation inlet, the recirculation loop is exposed to
unmixed VERY hot water.
M29854B
COLD WATER INLET
(FROM COLD WATER TEE)
MIXED WATER OUTLET
(3/4-IN. MNPT)
ALTERNATE HOT
WATER OUTLET
(3/4-IN. FNPT)
HOT WATER INLET
(3/4-IN. FNPT)
RECIRCULATION
INLET (1/2-IN. FNPT)
M29787
3/4 IN. NPT COLD
WATER INLET
COLD WATER
OUTLET TO
MIXING VALVE
1/4 IN. NPT COLD
WATER OUTLET
3/4 IN. NPT COLD
WATER OUTLET
TO WATER HEATER

AMX300 DIRECTCONNECT™ MIXING VALVE KITS
62-3113—05 4
INSTALLATION
1. Plastic thread protectors are installed in both ends of
the flexible metal connector. Remove these protectors
with pliers using a pulling and twisting motion, as
shown in Fig. 4.
CAUTION
Do not damage the flared connectors or threads of
the flexible metal connector when removing thread
protectors.
Fig. 4. Remove plastic thread protectors.
2. Install the cold water tee onto the water heater's cold
water inlet. If installing on a water heater with 1-in.
inlet fitting, use 1-in. FNPT to 3/4-in. MNPT brass
reducer bushing and brass nipples. Tighten until leak
tight and facing the front of the water heater as shown
in Fig. 5.
Fig. 5. Install cold water tee.
3. If compliance to ASSE 1017 code is required, install a
field supplied check valve in the cold water supply. In
this case an expansion tank is required prevent exces-
sive pressure in the system. If desired, the expansion
tank may be plumbed to the 1/4” NPT outlet on cold
water tee to expansion tank.
4. Install the AMX300 mixing valve onto the water
heater's hot water outlet. If installing on a water heater
with 1-in. outlet fitting, use 1-in. FNPT to 3/4-in. MNPT
brass reducer bushing and brass nipples. Tighten until
leak tight and facing the front of the water heater as
shown in Fig. 6.
Fig. 6. Install mixing valve.
5. Install the flexible metal connector to the AMX300 mix-
ing valve and cold water tee as shown in Fig. 7. Tighten
flare connectors until leak tight. At this time the mixing
valve kit should be leak tight.
Fig. 7. Install flexible connector.
Continue installation of potable water system as indicated in
the installation and operation instruction manual supplied
with the water heater. Once potable water system has been
completely installed, and all connections are lead tight,
attach the thermostrip to the mixed water outlet pipe no more
than 10 in. from the outlet of the AMX300 mixing valve.
M29788
FLEXIBLE
METAL
CONNECTOR
FLARE
CONNECTORS
WITH THREAD
PROTECTORS
FRONT
HOT
COLD
EXTERNAL FITTING
INLET (COLD)
M29697
DIRECTLY TOWARD FRONT
OF THE WATER HEATER
BACK
FRONT
HOT
COLD
EXTERNAL FITTING
OUTLET (HOT)
M29699
DIRECTLY TOWARD FRONT
OF THE WATER HEATER
BACK
HOT
COLD
M29698B
FLEXIBLE
CONNECTOR

AMX300 DIRECTCONNECT™ MIXING VALVE KITS
562-3113—05
TEMPERATURE ADJUSTMENT
Prior to adjusting the hand wheel setting on the mixing valve,
the water heater must be operational and deliver hot water
within the water heater outlet temperature range, typically
100°F–180°F (38°C–82°C). To achieve the desired mixed
water supply temperature, the temperature setting on the
water heater may need to be adjusted. Prior to measuring the
mixed water supply temperature, using the supplied
thermostrip, ensure the hot water tank recovers from any
aquastat adjustment and the temperature of the hot water in
the heater has stabilized.
Measure the mixed water supply temperature by opening
the hot water tap at the nearest faucet supplied by the
AMX300 mixing valve. A minimum flow rate of 1 to 1.5 gpm
(4 to 6 L/min) is recommended for accurate temperature
readings on the thermostrip (see Fig. 8). Allow the hot
water to run until a steady temperature reading is
displayed on the thermostrip.
Fig. 8. Flow vs. pressure drop.
WARNING
Increasing water temperature increases the risk of
scald injury. Scalding may occur within 5 seconds at a
setting of 140°F (60°C). Water temperature over
120°F (49°C) can cause serious injury. Children, the
disabled, and the elderly are at highest risks of being
scalded. Please feel the water before bathing or
showering.
The mixed water supply temperature may require
adjustment. The mixing valve kit is set at approximately 120
ºF (49 ºC) when the arrow on the hand wheel and the arrow
on the valve body are aligned.
1. To Increase mixed water supply temperature: Push in
and rotate the hand wheel counter-clockwise until the
desired set point is reached as indicated on the ther-
mostrip reading (see Fig. 9). Ensure the hand wheel
snaps back to a locked position once desired set point
is reached.
2. To Decrease mixed water supply temperature: Push in
and rotate the hand wheel clockwise until the desired
set point is reached as indicated on the thermostrip
reading (see Fig. 9). Ensure the hand wheel snaps back
to a locked position once desired set point is reached.
Fig. 9. Thermostrip.
FLOW VERSUS PRESSURE DROP
PRESSURE
DROP
(PSI)
FLOW (GPM)
50
40
30
20
0412 16 20
M29789A
MIXED
TEMPERATURE
OF 140°F (60°C)
60
10
0
28
610 14 18
MIXED
TEMPERATURE
OF 120°F (49°C)
MIXED
TEMPERATURE
OF 95°F (35°C)
Table 1. Scald Risk Chart
Water Temperature Time to scald (approximate)
155 °F (68 °C) About 1 second
150 °F (66 °C) About 1-1/2 seconds
145 °F (63 °C) Less than 3 seconds
140 °F (60 °C) Less than 5 seconds
135 °F (57 °C) About 10 seconds
130 °F (54 °C) About 30 seconds
125 °F (52 °C) 1-1/2 – 2 minutes
120 °F (49 °C) More than 5 minutes
Thermostrip
Accuracy expires
after MMMYYYY
11043 11244 11446
11647
11848
12049
12250 12451
12652
12853 13054 13255 13456
13657
13858
14060
ºF ºc
116
47
118
48
120
49
122
50
124
51
M29700B

AMX300 DIRECTCONNECT™ MIXING VALVE KITS
62-3113—05 6
MAINTENANCE
Resideo recommends that the AMX300 mixing valve kit be
checked annually to ensure proper operation. In areas with
adverse water conditions, such as extremely hard water,
more frequent intervals are recommended.
Hard water conditions may result in scale deposits causing
binding of internal parts in extreme cases. Scale build-up
occurs more quickly with high water hardness and higher
temperature of the water stored in the tank.
Cleaning the internal parts will usually restore the valve
operating conditions. In some cases, it may be necessary to
replace the thermostatic element assembly (See Fig. 10). A
Thermostatic Element Replacement Kit, AM-1-025RP, is
available through Resideo distributors.
To remove scale from the internal surfaces of the AMX300
mixing valve, or to replace the thermostatic element, it is not
necessary to remove the valve from the piping. Simply
perform the following steps:
1. Shut off cold water supply to the water heater
2. Open a hot water faucet to drain hot water from the
system piping
3. Follow directions in the MAINTENANCE section of
“AMX300 Series DirectConnect™ Mixing Valve Installa-
tion Instructions”, Resideo literature # 62-3112 (sup-
plied with the AMX300 mixing valve kit)
4. Open the cold water supply shut-off valve until hot
water flows from the hot water faucet that was opened
in step 2 above.
5. When a steady stream of water flows from the faucet,
close the faucet
6. Check for leaks on the AMX300 mixing valve and
tighten components as required
7. Restart the water heater, following the water heater
manufacturer's directions, and wait until it reaches set-
point and the temperature in the tank has stabilized
8. Test the temperature at the mixed water outlet (as
described in the TEMPERATURE ADJUSTMENT section
above) and adjust hand wheel position as necessary to
achieve desired temperature.
There may be some variation in the water temperature from
the mixing valve kit due to seasonal temperature variations in
the cold water supply.
Fig. 10. Expanded view of AMX300 Mixing Valve.
REPLACEMENT PARTS
Rebuild kit for AMX300 mixing valve. AM-1-025RP
Thermostrips (in packs of 10). TS205-064
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

AMX300 DIRECTCONNECT™ MIXING VALVE KITS
762-3113—05

AMX300 DIRECTCONNECT™ MIXING VALVE KITS
© 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
62-3113—05 M.S. Rev. 03-20 | Printed inUnited States