Powers 447 User Manual

Hydroguard ESP infrared shower systems rely on infrared tech­nology to sense the presence of a user and to immediately turn
on a water supply. The shower automatically shuts off when the
bather steps out of the invisible beam of infrared light, or when
the maximum shower time has been reached. The shower time is
field adjustable from 0 to 14 minutes.

All showers are supplied complete with the sensor assembly,
transformer (plug in or box, as specified), solenoid valve, modular
junction box and mounting hardware.

The following instructions will serve as a guide when installing the
Powers ESP sensor operated showers. As always, good safety
practices and care are recommended when installing electrical
equipment. We suggest that you follow the procedures outlined.
If additional assistance is required, please call the Powers
Application Engineering Department at [phone].

TECHNICAL INSTRUCTIONS

Hydroguard ESP

TM

Infrared Sensor Showers

A Watts Industries Co.

DESCRIPTION

Prior to Installation
WARNING

:

• 24V AC Step down transformer must be used for single and
group shower applications.

• Do not allow power transformer wires to touch during wiring,
since this could cause permanent damage to the trans­former. To avoid this, do not supply power to, or plug in, the
transformer until all other wiring is complete.

• Since solenoid valves require water free of sand, grit, etc., to
operate properly, flush water lines until water is free of those
materials before connecting solenoid valve.

• All electrical wiring and plumbing should be done in accor­dance with national/local codes and regulations.

• We recommend the use of stainless steel screws for installa­tion of all components.

TOOLS REQUIRED:

• Slotted and Phillips screwdrivers

• Drill

• Pipewrenches

• Pipe dope/sealing compound

Powers ESP Infrared Showers are supplied with a brass Solenoid
Valve, into which tempered water should be connected. A
Powers thermostatic mixing valve, such as the Hydroguard
Series 430, will ensure safe comfortable water is supplied to your
shower system.

Step 1: Determine Shower Component Layout

Several components, including the shower sensor, control box,
solenoid and transformer, will need to be installed to ensure prop­er operation of the infrared shower system.

The first location to be identified should be the shower sensor…
the sensor is housed in a Stainless Steel Plate designed for sur­face mounting onto the shower wall. Once the sensor location is
determined, you can decide on the location of the other compo­nents—the solenoid and sensor are typically located within 2 feet
of the modular junction box, but you can use 4 conductor flat
telephone cable and connectors to locate the components up to
as far as 100’ away from the sensor.

INSTALLATION

Modular
junction box

Sensor
assembly

CL of electrical box:
41″ to finished floor

Electrical box
(supplied by others)

Solenoid valve
assembly

Finished
wall

Box transformer

41″

Figure 1: Typical Shower Installation

Showerhead &
arm/flange

Piping supplied
by others

ESP Model 447-10000K100

Form TI447S

TI447S Page 2

The solenoid valve should be located as close as possible to the
showerhead it is servicing. Access to the valve must be provided
for maintenance and servicing.

Suggested height for mounting of the sensor for adult men and
women is approximately 41”… adjustments to height should be
made for adolescents and children. Measure the proper height
from the floor… mark shower sensor location with a pencil. Using
a 5/8” drill bit, drill hole for sensor connection cord.

Once you’ve pushed the shower sensor cord through the hole,
use the stainless steel plate as a template, marking the location
of the mounting screws. The shower sensor assembly can be
mounted to a 4 x 2 x 23/16” deep electrical box with screws pro­vided, although it is not necessary to do so. If installing onto wall,
drill 2 mounting holes (refer to figure 2) and install the sensor
assembly.

Do not yet tighten screws since you may need access to the sen­sitivity and run time potentiometers for final adjustments.

Step 2: Install Solenoid

To facilitate servicing, you may wish to install a service stop
directly upstream of solenoid. Prior to installing solenoid, flush
lines to be sure supply water is free from grit and sand. Solenoid
end connections are 3/4” NPT.

Using thread sealant on male threads only (do not use teflon
tape), connect supply line to solenoid, checking to be sure the
flow is in the proper direction (flow arrow is marked on solenoid
body). For normal operation, check to be sure the solenoid man­ual override is in the “off” position or water will flow regardless of
sensor activation/deactivation.

Connect outlet side of solenoid to showerhead piping.

Step 3: Install Modular Junction Box

Keeping in mind that the solenoid and sensor must be within 2¢
of the modular junction box (unless you’re using extra cables and
connectors), determine the location for mounting. Using the base
of the box as a template (cover should be removed by unsnap­ping from base), drill two small holes for mounting of the box.
Install box. (See figure 3.)

Step 4: Transformer Installation

Transformer can be remotely located (in the chaseway, closet or
in ceiling, etc.) and can typically power up to eight shower solenoids.
You may wish to install a remote shut-off switch to shut down power
to showers during maintenance, cleaning or repair.

For single shower applications, connect supply wires to modular
junction box by loosening black and yellow screw terminals of mod­ular junction box. Using the power cord wire supplied, connect one
of the two wires to the yellow terminal, the other to the black termi­nal, tightening the screws for a sure connection. (Refer to figure 5.)

Replace cover onto Modular Junction Box. Insert the plug from
the solenoid into one receptacle of the modular junction box, and
the plug from the sensor into the other receptable. Either plug
can be inserted into either receptacle of the modular junction box.

Plug In Transformer (see figure 6). This type of Transformer is
designed to be plugged into a 110V AC wall outlet. Transformer
is supplied with a 10’ wire, which can be shortened or length­ened to meet installation requirements using 22 gauge bell wire.
Connect the feed wires to the screw terminals on the secondary
side of the transformer. To avoid permanent damage to the trans­former, sensor or solenoid valve, do not plug transformer into
outlet until all wiring has been completed!

Box Mount Transformer (see figure 7). This type of transformer is
designed to be mounted on an 110 VAC supply electrical junc­tion box (“J” box should be mounted inside chase wall or above
ceiling). Run wires from secondary side of transformer to control
box enclosure. To avoid permanent damage to the transformer,
sensor, or solenoid valve, do not supply power to primary side of
transformer until all wiring has been completed.

Step 5: Start Up

Supply power to transformer.
Activate the sensor and check to
be sure the small red activation
light appears in the bottom of
sensor lens. (Refer to figure 8.)

INSTALLATION, CONTINUED

31⁄

4

15⁄

8

5

⁄8 Dia. Hole

3

⁄

16

Dia. Hole

2 places

Shower Sensor
Assembly
Mounting Holes

Overall size of
plate: 4

7

⁄

8

″ square

Figure 2

Sensor Assembly Mounting Holes

Figure 3

Modular Junction Box

Solenoid Valve
or IR Sensor Connector

Red

Yellow

24 VAC to Yellow & Black

24 VAC

Solenoid Valve
or IR Sensor Connector

Black

Green

Figure 5

Modular Junction Box—Wiring

Figure 6

Plug-In
Transformer

Red

indicator light

Figure 8

Sensor Assembly Activation Light

Box Mount

Transformer

24V AC

Secondary

Figure 7