American Standard R520 User Manual

Installation

Instructions

R520

CENTRAL THERMOSTAT
WITH VOLUME CONTROL

Thank you for selecting American-Standard...the benchmark
of fine quality for over 100 years.

To ensure that your installation proceeds smoothly--please
read these instructions carefully before you begin.

ROUGHING-IN DIMENSIONS

CONNECTIONS ARE: 1/2" NPT

1/2" NPT
SHOWER

3-15/16

1/2" NPT
INLET

II II

3-5/8

1/2" NPT
TUB

5-7/8

1/2" NPT
INLET

7

1-5/8 - 2-1/2

OP

T

Certified to comply with ANSI A112.18.1M
ASSE 1016

M968255Rev.1.1

6-1/4

THERMOSTATIC BATH/
SHOWER INSTALLATION
USING A TWIN ELL, DIVERTER
SPOUT AND FIXED SHOWER

C/L

80"-86"

18"

(OPTIONAL)

TWIN

ELL

TOP OF TUB RIM

BOTTOM OF TUB

IMPORTANT: WHEN NOT USING A
DIVERTER SPOUT A SEPARATE
DIVERTER VALVE MUST BE USED.

TUB PORT

MUST BE

PLUGGED

4"

THERMOSTATIC SHOWER INSTALLATION
USING A DIVERTER VALVE, FIXED
SHOWER HEAD AND ADJUSTABLE HAND
HELD SHOWER

DIVERTER

VALVE

HOT

1/2" 1/2"

TUB PORT MUST
BE PLUGGED

COLD

THERMOSTATIC SHOWER INSTALLATION USING A
DIVERTER VALVE, FIXED SHOWER HEAD, ADJUSTABLE
HAND HELD SHOWER, ON/OFF VALVE AND TWO
BODY SPRAYS

DIVERTER

VALVE

ON/OFF

VALVE

HOT

1/2" 1/2"

TUB PORT MUST
BE PLUGGED

NOTE: MINIMUM FLOWING PRESSURE REQUIRED FOR
THIS SYSTEM OPERATING WITH ONE SHOWER HEAD
AND 2 BODY SPRAYS IS 40 PSI

COLD

ROUGHING-IN THE VALVE

1

Prepare water supplies per ROUGHING-IN DIMENSIONS. Make sure the finished wall is between
the minimum and maximum rough dimension.

Install VALVE at indicated height and depth. Make sure the "TOP" marking on the PLASTER
GUARD is up.

Connect the hot and cold water supplies. Assemble all connecting pipes. Flush lines to
remove any dirt. Connections are 1/2" NPT.

Assemble the connection pipe to one of the MIXED OUTLETS of the VALVE.
Cap the other MIXED OUTLET. (Tub port is fitted with a plug at the factory).

WARNING

DO NOT SOLDER DIRECTLY TO THE VALVE BODY; THIS WILL DAMAGE
THE TEMPERATURE CONTROL ELEMENT AND CHECK STOP VALVES.

WOOD

BRACE

HOT

MIXED

COLD

OP

T

IMPORTANT! INSTALL ANY REQUIRED SHUT OFF OR DIVERTER VALVES
INTO THE PIPING SYSTEM.

If the CHECK STOPS (4, 5) were removed during installation,
ensure the hot and cold CHECK STOPS (4, 5) are not reversed. The
hot CHECK STOP (4) has a red top and the cold CHECK STOP (5)
has a blue top.

CHECK STOPS (4,5) are supplied in the open position.
Closing using 5/32" (4 mm) hex wrench to pressure
test and to check for leaks.

To flush lines, remove the CHECK STOPS (4,5)
and run water. If desired, the TEMPERATURE
CONTROL UNIT can be removed. Reinstall CHECK
STOPS (4,5) and CONTROL UNIT (6), if it was
removed.

Remove PLASTER GUARD (2) if still installed.
Turn on water supplies and check for leaks.

Reassemble PLASTER GUARD (2) and FINISH
WALL.

Beware of Freezing. No water should remain
in the MIXING VALVE if freezing is a possibility.
Remove the CHECK STOPS (4,5) to completely
drain the MIXER UNIT (1).

TEMPERATURE ADJUSTMENT

2

Unscrew PLASTER GUARD SCREWS and remove PLASTER GUARD.

Check that arrow marking B points vertically upwards. If not, push the BLACK
CLAMP on the SECURING RING to the right, pull off KNOB MOUNT and reinstall
KNOB MOUNT with arrow "B" pointing upwards.

The maximum mixed water temperature is set at 109 F at the factory.
This setting can be changed if desired.

Remove the TEMPERATURE LIMIT STOP (H shaped Black Plastic part). Reinstall it
at the desired notch as indicated in the diagram to limit the maximum mixed water
temperature to 104 F or 112 F.

For 100 F adjustment, turn the water supply on. Turn KNOB MOUNT until the spout
temperature is 100 F. Check that arrow marking A on the KNOB MOUNT still points
upward after adjusting the thermostat to 100 F. If not, pull out the RED LOCKING DEVICE.
Remove KNOB MOUNT by pulling it towards you while standing directly in front of the valve.

HOT

1

3

PLUG TUB

PORT

CHECK STOP

(HOT RED)

6

4

TEMPERATURE

LIMIT STOP

COLD

2

104

109

112

SECURING

RING

RED LOCKING

DEVICE

ARROW

"B"

5

CHECK STOP
(COLD BLUE)

PLUG TUB

PORT

BLACK

CLAMP

TOP

ARROW

"A"

KNOB

MOUNT

Reinstall the KNOB MOUNT so that the arrow marking A points upwards.

Reinstall RED LOCKING DEVICE.

TRANSPOSED SUPPLY PIPING
OR BACK TO BACK INSTALLATION

3

Should the hot and cold water supply pipes have been transposed making
adjustment impossible, proceed as follows:

Shut off water supply.
Remove handle and rim

Remove check stops and re-install them transposed.

Important note: RED CHECK STOP is now on the right of the mixer body and the BLUE
CHECK STOP is now on the left.

Turn the water supply back on and perform the temperature adjustment in step 2.

CHECK STOP

(RED TO BLUE)

CHECK STOP

(BLUE TO RED)

M968255Rev.1.1