Waterworks WWSU08 Quick guide

INSTALLATION AND SERVICE INSTRUCTIONS
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ATMOS STEAM GENERATORS
WWSU08, WWSU11 AND WWSU15
Instructions for 208V and 240V 1/3 Phase Models.
(Use 240V models for 400-415V~N3 installations)
FOR USE WITH WWSU46 CONTROL PACKAGE
Package includes: Exterior Control, Interior Control, control
cables and a steam head.
SAVE THESE INSTRUCTIONS
READ ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLATION.
POST SAFETY "WARNING" LABEL OUTSIDE STEAMBATH. LABEL
SHOULD BE POSTED ON OR ADJACENT TO DOOR TO STEAM
ROOM IN COMMERCIAL INSTALLATIONS.
SECTION 1: GENERAL INFORMATION
Waterworks’ steam generators are tested by Intertek-ETL Laboratory. The steam generators come assembled and ready for
installation. Check that the size and rating of the generator is suitable for your application, refer to the Steam Room Construction
and Generator Guide (Waterworks doc. 4211-36).
These steamers may be connected as a ganged system where one steamer controls one or two other steamers. Bath controls
connect to the primary steamer and the primary steamer connects to the second steamer (and third steamer, if installed). This
provides more power for large rooms and light commercial use. See appendix to this document for details. We recommend
choosing steamers which are closely matched in power. The highest kW steamer should be the primary unit. Each steamer
should have its own automatic drain.
For commercial use, we recommend checking with your local inspectors to confirm the steamer system is acceptable for your
use. Many jurisdictions will require an ASME boiler for commercial use: WATERWORKS steamers are not boilers.
Note: These steamers may be configured for single or three phase power during installation.
IMPORTANT
An exhaust fan installed outside the steam room is strongly
recommended to remove excess steam from the bathroom or
shower area.
CAUTION
Electrical grounding is required on all
WATERWORKS Steam bath Generators.
All electrical supplies should be
disconnected when servicing generator.
All wiring must be installed by a licensed
electrical contractor in accordance with
local and national codes.
All plumbing must be installed by a
licensed plumber in accordance with all
applicable local and national codes.
Steam generators are
for indoor use only.
Steam generators are not for
space heating purposes.
Be certain that steam bath enclosures
are properly sealed to avoid water
damage from escaping steam. It is
recommended that 100% silicone caulk
be used to seal all pipes and fittings.
Steam must be prevented from escaping
into the wall cavity.
Never shut off the water to a
steam generator that is in use.
Electric Shock Hazard - High voltage
exists within this equipment. There
are no user serviceable parts in this
equipment.
STEAM HEAD
STEAM GENERATOR
EXTERIOR CONTROL
(K3)
INTERIOR CONTROL
(KT3)

INSTALLATION AND SERVICE INSTRUCTIONS
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TABLE OF CONTENTS
Section
Description
Page
Important Safety Instruction
3-6
1
Mounting the Generator
7-8
2
Water Quality Requirements
8
3
Plumbing Instructions
9-12
4
Wiring Instructions
12
Electrical Information Chart
13
5
Bath Control Installation
14
6
Control Options
15
7
Initial Start
15
Wiring Diagrams
16-17
System Installation Instructions
Appendix

INSTALLATION AND SERVICE INSTRUCTIONS
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WARNING
Thank you for purchasing your new Waterworks steam generator.
FOR THE SAFETY OF YOU AND YOUR FAMILY OR CUSTOMERS, PLEASE READ THE
FOLLOWING WARNINGS AND ALL INSTRUCTIONS BEFORE USING YOUR STEAMBATH.
POST "STEAMBATH INSTRUCTIONS" LABEL OUTSIDE STEAMBATH FOR SAFETY WARNINGS.
SAVE THIS MANUAL
FOR THE SAFETY OF YOU AND YOUR FAMILY OR CUSTOMERS, PLEASE READ THE
FOLLOWING WARNINGS AND ALL INSTRUCTIONS BEFORE USING YOUR STEAMBATH.
POST "STEAMBATH INSTRUCTIONS" LABEL OUTSIDE STEAMBATH FOR SAFETY WARNINGS.
Electric Shock Hazard - High voltage exists within this equipment. Disconnect all electrical power before
servicing the generator. All installation and service to this equipment should be performed by qualified
licensed personnel in accordance with local and national codes. There are no user serviceable parts in
this equipment.
Electrical grounding is required on all Waterworks steam generators. The generator is designed for hookup with
copper wire only, 167°F (75°C) or better.
Wire the controls exactly as described. Do not connect any additional wiring or power supplies to the controls or
their terminals in the generator.
Service only by authorized personnel!
All plumbing must be installed by a licensed plumber in accordance with all applicable local and national codes.
Install indoors only. Protect from freezing. Generator must be level side to side and end to end.
The pressure relief valve and generator drain must be installed in such a fashion that the risk of scalding is reduced
to a minimum. Draining these outlets into the steam room may present a scald hazard and may damage materials
used to construct the room.
Danger To reduce the risk of explosions, do not interconnect the steam lines!
Caution The steam outlet carries hot vapor! A separate steam line is required for each steam outlet.
Do not connect a valve or shut-off in the steam line! Avoid traps and valleys in the steam line where
water could collect and cause a steam blockage. The hot steam line must be insulated against user contact.
Do not install the steam head near a bench or where steam may spray or where condensation will drip on the user
as this will present a scald hazard.
Be certain that steambath enclosures are properly sealed to avoid water damage from escaping steam. It is
recommended that 100% silicone caulk be used to seal all pipes and fittings. Steam must be prevented from
escaping into the wall cavity. Centering the steam pipe is critical in rooms made of plastic, acrylic, resin, fiberglass,
or similar materials. Allowing the steam pipe to touch materials not rated 240°F (115°C) or higher will result in
damage to these materials.

INSTALLATION AND SERVICE INSTRUCTIONS
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AVERTISSMENT
Merci pour l'achat de votre nouveau WATERWORKS générateur de vapeur.
POUR LE SËCURITË DE VOTRE FAMILLE ER VOUS OU CLIENTS, VEUILLEZ
LIRE LES AVERTISSEMENTS SUIVANTS ET TOUTES LES INSTRUCTIONS AVANT
D'UTILISER VOTRE BAIN DE VAPEUR.
POST "BAIN DE VAPEUR" LABEL HORS D UN BAIN DE d'INSTRUCTIONS
POUR DES AVERTISSEMENTS EN MATIÈRE DE SÉCURITÉ.
ENREISTREZ CE MANUEL
POUR LA SËCURITË DE VOTRE FAMILLE ET VOUS OU VOS CLIENTS, VEUILLEZ LIRE
APRèS AVERTISSEMENTS ET TOUTES LES INSTRUCTIONS AVANT D'UTILISER VOTRE BAIN DE VAPEUR.
POST "BAIN DE VAPEUR" LABEL HORS D' UN BAIN DE VAPEUR D'INSTRUCTIONS POUR DES
AVERTISSEMENTS EN MATIÈRE DE SËCURITË.
Risque de choc électrique - Haute tension existe au sein de ce matériel. Débranchez toute source d'alimentation
avant de procéder à l'entretien du générateur. Toutes les instructions d'installation et service à cet équipement doit
être effectuée par du personnel autorisé qualifié conformément aux codes locaux et nationaux. Il n'y a pas de pièce
réparable par l'utilisateur à cet équipement.
Mise à la terre électrique est requis sur tous les générateurs bain de vapeur Waterworks. Le générateur est conçu pour
connecter un fil de cuivre uniquement, 75 °C ou mieux.
Câbler le contrôle très exactement comme indiqué. Ne connectez aucun câblage supplémentaire ou blocs d'alimentation pour
les commandes ou leurs terminaux dans le générateur.
Service uniquement par le personnel autorisé!
Toute la tuyauterie doit être installé par un plombier sous licence conformément à tous les codes locaux et nationaux
applicables.
Installer à l'intérieur uniquement. Protéger du gel. Générateur doit être mise à niveau latérale et l'extrémité à l'autre.
La valve de limitation de pression et purge du générateur doit être installé de telle façon que le risque de brûlure est réduit à un
minimum. Vidange de ces prises dans la salle de vapeur peut présenter un risque de brûlure et peut endommager les matériaux
utilisés pour construire la salle.
Danger Pour réduire les risques d'explosion, ne pas connecter les conduites de vapeur t!!
Attention La sortie vapeur transporte vapeur chaude ! Une conduite de vapeur distincte est requise pour chaque
sortie vapeur. Ne connectez pas une valve ou l'arrêter dans la conduite de vapeur! Éviter les pièges et les vallées
dans la conduite de vapeur où l'eau pourrait recueillir et provoquer un blocage de vapeur. La vapeur chaude ligne doit être
isolée par rapport au contact de l'utilisateur.
Ne pas installer la tête de vapeur près d'un banc ou où la vapeur peut pulvériser ou où la condensation s'égoutter sur l'utilisateur
comme cela présentera un risque de brûlure.
Etre certain que le bain de vapeur boîtiers sont étanches afin d'éviter les dégâts d'eau de s'échapper la vapeur. Il est
recommandé que 100% mastic au silicone utilisée pour obturer tous les raccords et tuyaux. La vapeur doit être empêché de
s'échapper dans la cavité du mur. Centrage du tube à vapeur est critique dans les chambres faites de plastique, de l'acrylique,
résine, la fibre de verre ou des matériaux similaires. Permettant le tube à vapeur pour toucher les matériaux non coté 115°C ou
plus aura pour effet d'endommager ces matériaux.

INSTALLATION AND SERVICE INSTRUCTIONS
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POST "WARNING LABEL OUTSIDE STEAMBATH FOR SAFETY WARNINGS
Étiquette d'avertissement "Extérieur poste baiin de vapeur pour les avertissements relatifs à la sécurité

INSTALLATION AND SERVICE INSTRUCTIONS
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IMPORTANT USER SAFETY INSTRUCTIONS
1. READ AND FOLLOW ALL INSTRUCTIONS. —SAVE THESE INSTRUCTIONS!
2. The steam bath is not intended for use by anyone (including children) with reduced physical, sensory, or mental capabilities or who lack
experience or knowledge, unless they have supervision or training on the use of the steam bath by a person responsible for their safety.
3. WARNING - To reduce the risk of injury, do not permit children to use this product unless they are closely supervised at all times. Ensure
they do not play in the steam bath.
4. WARNING - To reduce the risk of injury:
a. The wet surfaces of steam enclosures may be slippery. Use care when entering or leaving.
b. The steam head is hot. Do not touch the steam head and avoid the steam near the steam head.
c. Prolonged use of the steam system can excessively raise the internal human body temperature and impair the body’s ability to
regulate its internal temperature (hyperthermia). Limit your use of steam to 10 to 15 minutes until you are certain of your body’s
reaction.
d. Excessive temperatures have a high potential for causing fetal damage during the early months of pregnancy. Pregnant or possibly
pregnant women should consult a physician regarding correct exposure.
e. Obese persons and persons with a history of heart disease, low or high blood pressure, circulatory system problems, or diabetes
should consult a physician before using a steam bath.
f. Persons using medication should consult a physician before using a steam bath since some medication may induce drowsiness while
other medications may affect heart rate, blood pressure and circulation.
5. WARNING - Hyperthermia occurs when the internal temperature of the body reaches a level several degrees above the normal body
temperature of 98.6°F (37°C). The symptoms of hyperthermia include an increase in the internal temperature of the body, dizziness,
lethargy, drowsiness, and fainting. The effects of hyperthermia include:
a. Failure to perceive heat;
b. Failure to recognize the need to exit the steam bath;
c. Unawareness of impending risk;
d. Fetal damage in pregnant women;
e. Physical inability to exit the steam bath; and
f. Unconsciousness.
6. WARNING - The use of alcohol, drugs or medication can greatly increase the risk of hyperthermia.
1. Lire et suivre toutes les instructions. -- Conservez ces instructions !
2. Le bain de vapeur n'est pas destiné à être utilisé par toute personne (y compris les enfants) avec toutes leurs capacités physiques,
sensorielles ou mentales ou qui manquent d'expérience ou de connaissances, à moins qu'ils aient la supervision ou de la formation sur
l'utilisation du bain de vapeur par une personne responsable de leur sécurité.
3. Avertissement : Pour réduire les risques de blessures, ne pas permettre aux enfants d'utiliser ce produit, sauf s'ils sont étroitement
surveillés en tout temps. S'assurer qu'ils ne jouent pas dans le bain de vapeur.
4. Avertissement : pour limiter les risques de blessure :
a. Les surfaces mouillées de boîtiers de vapeur peut être glissant. Soyez prudent lorsque vous entrant ou sortant.
b. La tête de vapeur est chaud. Ne pas toucher la tête de vapeur et éviter la vapeur près de la tête de vapeur.
c. Une utilisation prolongée de la chaudière à vapeur peut augmenter excessivement la température du corps humain et d interne
nuisent à la capacité du corps de régler sa température interne (hyperthermie). Limitez votre consommation de vapeur pour 10 à 15
minutes jusqu'à ce que vous soyez certain de la réaction de votre corps.
d. Des températures excessives ont un haut potentiel de causer de dommages foetaux pendant les premiers mois de la grossesse.
Enceinte ou peut-être les femmes enceintes devraient consulter un médecin au sujet de l'exposition correcte.
e. Les personnes obèses et les personnes ayant des antécédents de maladie du coeur, tension artérielle basse ou élevée, des
problèmes du système circulatoire ou de diabète devraient consulter un médecin avant d'utiliser un bain de vapeur.
f. Les personnes qui utilisent ces médicaments devraient consulter un médecin avant d'utiliser un bain à vapeur depuis quelques
médicaments peut induire une somnolence tandis que d'autres médicaments peuvent affecter la fréquence cardiaque, la tension
artérielle et de la circulation.
5. Avertissement - L'hyperthermie survient lorsque la température interne du corps atteint un niveau à plusieurs degrés au-dessus de la
normale de la température corporelle de 37 °C. Les symptômes de l'hyperthermie comprennent une augmentation de la température
interne du corps, sensation vertigineuse, léthargie, somnolence et d'évanouissement. Les effets de l'hyperthermie comprennent :
a. L'incapacité de percevoir la chaleur
b. L'incapacité à reconnaître la nécessité de quitter le bain de vapeur :
c. La méconnaissance de l'imminence d'un risque :
d. Dommages au foetus chez les femmes enceintes :
e. Incapacité physique pour quitter le bain de vapeur : et
f. L'inconscience.
6. Avertissement - La consommation d'alcool, de drogues ou de médicaments peut augmenter considérablement le risque d'une
hyperthermie

INSTALLATION AND SERVICE INSTRUCTIONS
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SECTION 1: MOUNTING THE STEAM GENERATOR
The Waterworks steam generator can be hung on a wall or sit on its base. The best mounting location will satisfy all or most of
the following:
WARNING: The generator will not operate properly, unless it is mounted level with the arrows pointed up.
1. The generator should be installed in a dry, well-ventilated area. Suggested locations are under a vanity, in a closet,
attic, crawl space or basement. Do not mount outdoors.
2. If the generator will be in an area difficult to access, the water supply should be equipped with easily accessible water shut-
off valve in case of emergency.
3. If the steam line is in an area where the temperature will be below 39°F (4°C), best results can be obtained by insulating the
steam pipe. Do not mount the generator in an area subject to freezing.
4. The generator must be mounted in a minimum 7 cubic feet (0,2 cubic meter) space.
5. The location must allow access for service! Provide clearance for plumbing and electrical service and for element
removal. See Diagram 1.
6. The steam line should slope to allow condensation to drain. The mounting location should minimize the number of bends
and elbows in the steam line.
7. The mounting location should allow for a drain hook up.
8. The steam line should be less than 20 ft (6 m) long; 3 ft (1 m) is preferred. Steam lines over 20ft (6 m) long should be
insulated.
WARNING:
•There must be no dips or valleys in the steam line.
•Install the steam head to avoid potential user direct contact with the steam or where condensation may drip on the user as
this may present a scald hazard.
•Do not install any valves or other shut-off devices in the steam line!
•Do not interconnect steam lines! A separate steam line is required for each generator!
•Do not connect the drain line to the steam line or allow the drain empty into the steam room!
•Do not connect the pressure relief valve into the steam line or vent it where someone nearby could be scalded! Do not
allow the relief valve to vent into the steam room!
DIAGRAM 1
DIAGRAM 2
Leave 13” [330 mm]
Service Clearance
14.5” [368 mm]
13.2”
[335,3 mm]
0.8”
[20,3 mm]
Steamer must be level
End-to-End and
Front to Back

INSTALLATION AND SERVICE INSTRUCTIONS
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SECTION 1: MOUNTING THE STEAM GENERATOR (continued)
1. WALL MOUNTING:
a) Remove the side cover. Note the location of the mounting holes on
the back of the generator. The screws must set directly into studs
or equivalent supports. Drill pilot holes on 14-1/2” (368 mm) centers
and install the two #10 1½" screws, provided.
See at right.
b) Carefully hang the generator on the two screws. Tighten the
screws.
c) The generator may be further secured with two screws mounted on
the same 14-1/2” (368 mm) centers as shown.
d) Replace the front cover with its four screws.
2. FLOOR MOUNTING:
a) In general, the width of the unit allows it to sit on a shelf, across the
ceiling joists or on a floor. The generator must be restrained from
moving. Normally, the piping will provide adequate support. If not,
additional support must be provided.
b) All floor installed generators must provide for routine draining of the
tank and for draining the safety valve’s outlet.
SECTION 2: WATER QUALITY REQUIREMENTS
The nature of a boiler or steam bath generator requires testing of the
feedwater to avoid potential high concentrations of impurities which can
cause a deposit or scale to form on the internal surfaces. This deposit
or scale can interfere with the equipment's proper operation and even
cause premature boiler or generator failure. Concentration of impurities is generally controlled by treating the
feedwater and or "blowing down" the generator or boiler when it is not heating. The "blow down" process involves
removing a portion of the tank water with high solid concentration and replacing it with makeup water.
This is particularly important in areas with high calcium levels and other water quality problems. Calcium build-up
can cause poor steamer performance and damage the heating elements!
Be especially careful to prevent foaming in the steamer’s water! Foaming water will affect the water level
measuring systems in steamers and boilers, causing operation problems and possibly leading to early element
failures!
To ensure proper operation, the water supply should be tested prior to operating the equipment. There are several
treatment processes which can be used if you have a problem with hard water. A local reliable water treatment
company can recommend the appropriate treatment if required. The recommended feedwater quality is listed on
the next page.
Recommended Feedwater Quality
Hardness 10 –30 ppm - (0.5 - 1.75 gpg)
T-Alkalinity 150 –700 ppm - (8.75 - 40.8 gpg)
Silica Range 15 –25 ppm - (1.28 - 1.45 gpg)
PH (strength of alkalinity) 10.5 -- 11.5
WALL MOUNTING
14.5” [368 mm]
14.5” [368 mm]

INSTALLATION AND SERVICE INSTRUCTIONS
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IMPORTANT!
Regular maintenance will help your steamer work properly for a long time. Check for leaks,
loose or damaged wires, signs of corrosion and calcium build up in the tank on the level probe.
SECTION 3: PLUMBING INSTRUCTIONS
All plumbing shall be installed by a licensed plumber and conform with local & national codes.
Materials Needed:
•3/8NPT, 1/2NPT and 3/4NPT unions: recommended to allow easy disconnect of steamer for servicing.
•3/8" copper pipe and 3/8” male NPT adapter for the water supply to the generator.
•3/8" water supply shut-off valve.
•3/8" supply valve housing and filter (optional depending on local water conditions).
•1/2" copper pipe and (2) 1/2" male NPT adapters for the steam line between the generator and the steam room
outlet.
•3/4" copper pipe and 3/4" male NPT adapter for the tank drain.
•3/4" copper pipe, fittings, and a union for the Pressure Relief Safety Valve drain.
•Tube 100% silicone caulk.
•Pipe compound suitable for drinking water use at more than 212°F (100°C).
1. INSTALL WATER LINE Connect a cold-water line to the generators water valve. The valve input is 3/8” female
NPT. A shut-off valve should be placed in the line for each generator to allow for future servicing, if needed, and for
emergency shut-off. Make sure the shut-off is open, providing water to the generator before turning it on.
IMPORTANT
•Water pressure required: 20-100 psi (138-690 kPa)
•If the generator is mounted in a place difficult for the homeowner to access, the water supply
shut-off valve should be located where it can be quickly accessed in an emergency.
•Do not use a saddle valve or saddle fitting for the water shut-off valve.
•Flush water supply line before final hookup.
2. INSTALL STEAM LINE
a) At the generator: Install a 1/2" male NPT sweat adapter directly into the tank. Install a 1/2" union in the steam
line to allow easy disconnection for later servicing. Note: There must be no valves, shut offs or restrictions in
the steam line!
b) Run the 1/2" copper steam line from the generator to the steam room. Refer to SECTION 1: MOUNTING THE
STEAM GENERATOR and Diagrams 3a and 3b.
•The steam line must slope to allow condensation to drain into the tank or room.
•There must be no dips in the steam line. Low areas may collect condensation and cause faulty operation or
cause hot water to spit into the room.
c) The steam line should enter the steam room 18” (460 mm) above the floor or at least 12” (305 mm) above a tub
rim or ledge. The steam line outlet should be at least 6” (150 mm) from other steam heads to either side and
12” (305 mm) from walls or other surfaces to either side. See Diagrams 4, 5 and 6.

INSTALLATION AND SERVICE INSTRUCTIONS
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SECTION 3: PLUMBING INSTRUCTIONS (continued)
Diagram 3a
Diagram 3b
Note: See Diagram 6 for a typical installation. Additional steam heads may be added to any installation to reduce
steam noise or to provide more steam dispersion around a large room. For large WWSU15 steamers, we
recommend using 2 steam heads to reduce the noise level while steaming.
Note: If steam vents are too close to other surfaces, the steam may be cooled and the surfaces damaged.
d) At the steam room: Drill/prepare a 1-3/8” (35 mm) hole for the
steam line entry. Center the 1/2" copper steam pipe in the hole.
See Diagram 4.
•Terminate the steam line with a 1/2" NPT male adapter.
•Stub the line out into the room 3/8” (9,5 mm) from the finished
surface.
•Secure the steam line to a structural member.
3. INSTALL STEAM HEAD INSULATOR: Fill in gap (using 100%
silicone caulk between steam pipe and finished wall surface at point of
entry (see Diagram 4). Apply silicone caulk to the finished wall side of
the steam head insulator (see Diagram 5) and hand-tighten the screw
until it is flush with the wall with the opening pointing down. If a hand
tight fit does not align with the opening pointing down, use Teflon tape
on the steam line threads to adjust the fit.
DIAGRAM 4
3/8”
(9,5 mm)
FROM
WALL
1/2 NPT
1-3/8”
(35 mm)
HOLE

INSTALLATION AND SERVICE INSTRUCTIONS
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SECTION 3: PLUMBING INSTRUCTIONS (continued)
4. INSTALL STEAM HEAD: Slide the steam head on until it rests firmly
against the finished wall. Tighten the hex head screw underneath the
steam head to secure it in place with the Allen wrench provided. The
steam head should be level with its fragrance reservoir at the top. See
Diagrams 4 and 6.
IMPORTANT
All fixture holes must be sealed with 100% silicon caulk
to avoid moisture damage within walls. Check all the
standard fixtures in the steam room.
5. INSTALL PRESSURE RELIEF SAFETY VALVE: Install the pressure relief valve into its port on the generator.
Install the safety valve within 6” [150] mm of the generator. Run a 3/4" copper line from the valve to a gravity flow
drain. The pressure relief valve outlet must drain in accordance with local and national codes.
AUTODRAIN: All generators must have a drain valve installed to
allow draining the tank for cleaning and maintenance. A manual
ball valve is supplied. An electronic ball valve is available in the
ADK Autodrain option. When installed, Autodrain automatically
rinses and empties the steam tank approximately 25 minutes
after a steam bath stops. This cleans the tank to reduce problems
caused by poor water quality and ensures every steam bath
starts with clean, fresh water.
6. INSTALL DRAIN VALVE: Install a 3/4" NPT pipe nipple
directly into the tank as shown in Diagram 7. Install a 3/4" ball
valve or an Autodrain on the nipple then add another nipple to the
outlet of the valve. Add a union to the outlet nipple to allow easy
disconnection during servicing. Run a 3/4" copper line from the
union to a gravity flow drain. The drain must be connected in
accordance with local and national codes.
DIAGRAM 5
DIAGRAM 6
DIAGRAM 7
SILICONE
BACK
SIDE
12” [305 mm]
minimum
6”
[150 mm]
minimum
18”
[460 mm]
Shown with optional 2nd steam outlet.
HEATING ELEMENT
ACCESS
MANUAL VALVE
AUTODRAIN
VALVE
4” (100 mm)
3/4” PIPE
OR
Diagrams 7 and 8 show the optional Autodrain valve

INSTALLATION AND SERVICE INSTRUCTIONS
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SECTION 3: PLUMBING INSTRUCTIONS (continued)
IMPORTANT
All drain lines must run downhill, away from the steam generator! Also see Diagram 3
•Do not run the drain uphill.
•Do not drain the safety valve into the steam line!
•Do not drain the safety valve into the steam room! Draining the tank into the steam room may present a
scald hazard or damage the materials used to construct the steam room.
•Do not drain into the steam room!
SECTION 4: WIRING INSTRUCTIONS
ALSO SEE ELECTRICAL INFORMATION CHART AND WIRING DIAGRAMS
1. ELECTRICAL ROUGH-IN: Size wire for the generator as required by local or national codes. See the electrical
information on page 13 for further information. Use copper wire only. Leave 4ft (1,2 m) of slack wire at generator
location for finish hookup. Connect the generator to a dedicated circuit breaker. A GFI device is usually not required
by safety agencies. One may be installed if required by local codes or the owner. A GFI device will tend to nuisance
trip due to heater element aging.
a. Route the copper supply wire with appropriate strain
relief through the hole marked POWER ENTRY.
b. Connect the supply wires to the power terminal block as
indicated on the wire diagram for your voltage and
phase. This may require moving factory installed
jumper. Do not change the steamer’s internal jumpers or
wiring. Only the supply wiring side of the terminal blocks
require configuration by the installer.
c. Connect the Earth wire to the copper Earth ground lug.
d. Cover the supply wires inside the steamer with a
protective mesh or similar material to protect them
from water valve heating.
2. ELECTRICAL INFORMATION The steamers are available in
2 basic versions, one for 208V (intended for 208VAC single and three phase for North American use) and 240V
(intended for all other installations. The 240V models are rated at 240VAC and may be used on 208 to 240V single
phase Line-to-Line or 208 to 240V~N (Line-to-Neutral) or 208V to 240V three phase Delta without Neutral or for Y-
connected three phase 380 to 415V~N3.
All Units are factory wired for single phase installation. The installer may change the input to three phase or three
phase with Neutral during initial installation (see the wiring diagrams on page 16-17).
The National Electrical Code (NEC) limits a steamer’s current to 48 Amps so, in some cases, two separate power
supplies are required: WWSU11 & WWSU15 208V single phase and WWSU15 240V single phase require this
method.
See page 17 for Mains Wiring Details: Note: jumpers shown are supplied with the steamer)
DIAGRAM 8
CONDUIT
KNOCKOUT
WIRE DRAIN BLOCK
TO TERMINAL
BLOCK NEXT TO
GROUND

INSTALLATION AND SERVICE INSTRUCTIONS
4211-1661 Rev A 01/28/2022 Page 13 of 17
Electrical Information:
Nominal
Room Size cu ft
Room Size cu m
Model
VAC
min
Max
min
Max
WWSU08
208
100
200
2.8
5.7
240
WWSU11
208
200
400
5.7
11.3
240
WWSU15
208
350
550
9.9
15.6
240
Nominal
Watts at operating VAC
Model
VAC
208
230
240
400
415
WWSU08
208
7511
240
6888
7500
6888
7500
WWSU11
208
11267
240
10102
11000
10102
11000
WWSU15
208
13576
240
12858
14000
12858
14000
Nominal
Amps 1 phz
Recommended Breaker
Model
VAC
208
230
240
208
230
240
WWSU08
208
36
50
240
30
31
40
40
WWSU11
208
18 & 36
30 & 50
240
44
46
60
60
WWSU15
208
24 & 42
30 & 60
240
20 & 36
21 & 38
30 & 50
30 & 50
Nominal
Amps at operating VAC, 3 phz
Recommended Breaker
Model
VAC
208
230
240
400
415
208
230
240
400
415
WWSU08
208
21
30
240
17.3
18.1
10.0
10.5
30
30
15
15
WWSU11
208
31
40
240
25.4
26.6
14.6
15.4
40
40
20
20
WWSU15
208
38
50
240
32.3
33.8
18.6
19.6
40
50
30
30
Notes:
* Use only copper wire rated 600V~ and
167°F (75°C) minimum
* All models require Earth ground
* All line voltage must be more than 195V~
while the steamer is heating
* Steamers must be connected to a means
for disconnecting all supply voltages
* All WWSU15 and 208 WWSU11 single
phase require two Mains supplies

INSTALLATION AND SERVICE INSTRUCTIONS
4211-1661 Rev A 01/28/2022 Page 14 of 17
SECTION 5. BATH CONTROLS
1. INTERIOR AND EXTERIOR CONTROLS ROUGH-IN (See Diagram 9) The low voltage controls can be mounted
up to 25ft (7,6 m) from the generator, one inside and the other outside the steam room. The interior control must
be mounted inside the steam room so its built-in temperature sensor will function. String the 25ft (7,6 m) cable
from the control location through ½” (13mm holes) in the wall studs or ceiling joists to the generator. Note: Do not
staple through or damage cable. Use factory supplied cables only.
Optional for tile rooms: a rough-in box may be installed at the desired control mounting location. A mounting plate
with proper diameter hole and instructions are included with the control kit. Tile up to the hole in mounting plate as
indicated in Diagram 9.
2. INSTALL K3, KT3 GENERATOR CONTROL
The low voltage controls can be mounted directly to a finished wall either inside or outside the steam room except,
the low voltage KT3 control must be mounted inside the steam room. The K3 and KT3 controls have a short tube
on the back to help locate the control and to protect the cable end. All of these controls connect to the steam
generator’s circuit board through Waterwork’s CAT5 cable.
Use a 1-3/8” (35 mm) hole saw, to drill a hole in the finished wall where the control is to be mounted (the control
cable should already be roughed-in to this location). This must be inside the room for KT3 controls. Plug the cable
end into the jack in the back of the control
Run a bead of 100% silicon caulk around the tube on the back of the control. Make sure there is enough to fill any
grout lines and make sure the silicone is far enough from the edges to remain hidden after mounting to the wall.
Make sure the cable is firmly connected to the control then insert the control’s tube into the mounting hole and
firmly press the control against the wall. Level the control and tape it in place (painter’s tape generally works well),
then leave until the silicone is cured.
Route the generator end of the control cable through a knockout in the end of the generator and secure it using the
strain relief provided. Plug the control cable into its socket on the steam generators circuit board.
DIAGRAM 9
INTERIOR (KT3)
AND EXTERIOR
CONTROLS (K3)
1-3/8”(35 mm)
HOLE

INSTALLATION AND SERVICE INSTRUCTIONS
4211-1661 Rev A 01/28/2022 Page 15 of 17
SECTION 6. CONTROL OPTIONS
1. SELECT STEAMBATH RUN TIME
The temperature display can be set for a maximum bath time adjustable up to 60 minutes or up to 24 hours. Set the
circuit board jumper as shown below. The jumper is located at the right edge of the board just above the AK IN
jack.
Jumper Positions
3. SELECT TEMPERATURE DISPLAY (K3 and KT3 use only)
For installations with K3 or KT3 controls, the temperature display can be
set to Fahrenheit (°F) or Celsius (°C). Set the circuit board jumper as shown
above. The jumper is located at the right edge of the board just above the
AK IN jack.
SECTION 7. INITIAL START
1. Assure power and water are on. Press the control’s ON/OFF switch. The
control should light then the water valve should turn on to fill the steamer.
While filling, check for leaks.
2. After the tank has filled to a safe level, the heating elements will turn on. Allow about 10 minutes for the steam to
appear in the steam room.
3. Once the steam is visible, use the control to turn the bath off. The steam should stop within a couple minutes and
the water valve should turn off. The control should not be lit.
4. Press the ON/OFF switch again. The control should light.
5. Within one minute the unit should again produce steam. It should call for water once every two minutes or more
depending on its power rating. It’s normal for the flow of steam out the steam head to slow for up to 10 seconds
each time the unit calls for water.
6. The unit will shut down automatically in up to 60 minutes (depending on the TIME setting). When the bath time
runs out the steamer will stop and there should not be any water flow. The controls should not be lit.
on one pin
on both pins
60 minute maximum bath time
24 hour maximum bath time
NORM = normal operation
Leave on one pin only
°F = Display temperatures in Fahrenheit
°C = display temperatures in Celsius

INSTALLATION AND SERVICE INSTRUCTIONS
4211-1661 Rev A 01/28/2022 Page 16 of 17

INSTALLATION AND SERVICE INSTRUCTIONS
4211-1661 Rev A 01/28/2022 Page 17 of 17
240V MODELS
208V MODELS

4211-1661 01/28/2022
APPENDIX: SYSTEM INSTALLATIONAPPENDIX: SYSTEM INSTALLATION page 1
CAUTION
REDUCE THE RISK OF
1. Exit immediately if uncom fortable, dizzy or slee py. St aying too long in
a heated area is capa ble of causing overheating.
REDUCE THE RISK OF
Use care when enter ing or exiting the steam room, floor ma y be slippe ry.
NOTE : For additional sa fety instr uctions, see owner's manual .
CA UTION!
Do not contact steam head . St ay at least 12" away
from hot steam escaping from the steam outlet.
OVERHEA TING AND SCALDING
2. Supe rvise children at all tim es .
3. Chec k with a doctor be fore use if pregnant, diabetic , in poor health or
under medical car e.
4. Breathing heated air in conjunction with consumption of alcohol, dr ugs
or medication is capa ble of causing unconsciousnes s.
SLIPPING AND F ALL INJU RY
WARNING
4110-79
05-21-07
Waterworks’ steam generators are tested by Intertek-ETL Laboratory. The steam generators come assembled
and ready for installation. Check that the size and rating of the generator is suitable for your application, refer
to the Steam Room Construction and Generator Guide (Waterworks doc. 4211-36).
These steamers may be connected as a ganged system where one steamer controls one or two other steam-
ers. Bath controls connect to the primary steamer and the primary steamer connects to the second steamer
(and third steamer, if installed). This provides more power for large rooms and light commercial use. See
appendix to this document for details. We recommend choosing steamers which are closely matched in power.
The highest kW steamer should be the primary unit. Each steamer should have its own automatic drain.
For commercial use, we recommend checking with your local inspectors to conrm the steamer system is
acceptable for your use. Many jurisdictions will require an ASME boiler for commercial use: WATERWORKS
steamers are not boilers.
Note: These steamers may be congured for single or three phase power during installation
IMPORTANT
An exhaust fan installed outside the steam room is strongly recommended to remove excess steam
from the bathroom or shower area.
SECTION 1: GENERAL INFORMATION
ATMOS STEAM GENERATORS
FOR USE WITH STEAM SYSTEMS INCORPORATING
ONE WWSU PRIMARY STEAM GENERATOR AND
ONE OR TWO WWSU SECONDARY STEAM GENERATOR(S)
These instructions apply to
WWSU18 and WWSU21
Save these instructions! Read all instructions carefully before installation.
These instructions supplement the WWSU steamer installation instructions,
WATERWORKS document number 4211-1661
SECONDARY
GENERATOR
PRIMARY
GENERATOR
SECONDARY
GENERATOR
Electrical grounding is required on all
WATERWORKS Steam bath Generators.
All electrical supplies should be disconnected
when servicing generator.
All wiring must be installed by a licensed
electrical contractor in accordance with local
and national codes.
All plumbing must be installed by a licensed
plumber in accordance with all applicable
local and national codes.
Steam generators are
for indoor use only.
Steam generators are not for
space heating purposes.
Be certain that steam bath enclosures are
properly sealed to avoid water damage from
escaping steam. It is recommended that
100% silicone caulk be used to seal all pipes
and ttings. Steam must be prevented from
escaping into the wall cavity.
Never shut off the water to a
steam generator that is in use.
Electric Shock Hazard - High voltage exists
within this equipment. There are no user
serviceable parts in this equipment.
12 0
o
12 0
o

4211-1661 01/28/2022
APPENDIX: SYSTEM INSTALLATIONAPPENDIX: SYSTEM INSTALLATION page 2
The WATERWORKS Steam Generator can be hung on a wall or set on it’s base. The best mounting location
will satisfy all or most of the following conditions:
1. The steam line should slope to allow condensation to drain into the steam room.
2. The steam line should be less than 20 ft (6m) long; 10 ft (3m) is preferred. Steam lines over 20 ft (6m) long should be insulated.
3. The mounting location should minimize the number of bends and elbows in the steam line.
4. The steam line should enter the room 18” (460 mm) above the oor or at least 12” (305 mm)above a tub rim or ledge.
5. No steam head shall be more than 30 inches (760 mm) above the oor.
6. The steam outlet should be located to avoid potential user contact.
7. The steamers should be installed in a dry, well ventilated area. The space provided should be at least:
7 cu ft (0,2m3) for one steamer or 17 cu ft (0,5m3)for two steamers or 27 cu ft (0,8m3) for three.
Suggested locations are under a vanity or in a closet, attic, crawl space or basement. Note: The steamer must be in an area protected from freezing.
8. The slave steamers should be installed within a 25 ft (7,6m) cable length of the primary steamer and the secondary steamer(s) should be within a 25 ft (7,6m)
cable length of the control installation.
Note: Longer control and slave cables are available; contact Service at 1-800-927-2120, Ext 3 for assistance. The installation
should provide clearance for service and element removal. See diagram 3.
10. The mounting location should allow for a drain hookup. There should be no more than three 90° bends and 10 ft (3m) of pipe between any steamer’s drain
outlet and its drain valve inlet. See diagram 15.
11. Refer to the mounting instructions in WATERWORKS installation instructions document 4211-1661 for details regarding mounting individual steamers.
SECTION 2: SELECT MOUNTING LOCATION (continued)
IMPORTANT
Before deciding on a mounting location,
please read through these installation
instructions completely and take a careful
look at al of the diagrams.
An exhaust fan installed outside the
steam room is strongly recommended
in order to remove excess steam
from the steambath or shower area
It is strongly recommended that no exhaust
fan be installed inside the steam room. Doing
so will result in a loss of heat and steam
through the exhaust fan and port.
Insulate all steam lines and drain lines
within the enclosed space.
Each steamer must be provided with
at least six (6) inches for wiring
access at the control wiring end.
Each steamer must be provided with at least fteen
(15) inches clearance at the pipe end.
There should be at least thirty-six (36) inches
in front of the louvered cover at
each steamer for service access.
DIAGRAM 1: SERVICE CLEARANCE
36” (0,9 m) MIN
SERVICE CLEARANCE
15” (380 mm)
SERVICE CLEARANCE
MINIMUM
6” (150 mm) MIN
SERVICE CLEARANCE
6” (150 mm) MIN
SERVICE CLEARANCE
WARNING
! Do not put a shut-off valve in the steam line!
The line must be unrestricted from the steamer into the steam room !
To reduce the risk of explosion, do not interconnect steam outlets!
• Do not mount outdoors.
• Protect from freezing.
• Unit must be located so as to allow access for service.
• The steam steamer will not operate properly unless it is mounted level with the arrows pointed up.
• A separate line must be provided or each steam outlet.
• Avoid traps and valleys where water could collect and cause a steam blockage.|
• The hot steam must be insulated against user contact. Install the steam head so as to avoid potential
user contact.
• Do not install the steam head near benches or where condensation will drip on the user or puddle as
this will present a scald hazard.
• The pressure relief valve must be installed in manner that reduces the risk of scalding.
• Do Not drain the pressure valve or steamer into the steam room!
• Draining the pressure relief valve into the steam room may present a scald hazard!
Refer to the following diagrams for some suggested systems (and some not allowable steam pipings).

4211-1661 01/28/2022
APPENDIX: SYSTEM INSTALLATIONAPPENDIX: SYSTEM INSTALLATION page 3
PREFERRED
SHOWN WITH
OPTIONAL FILTER
(NOT PROVIDED)
DIAGRAM 2
PREFERRED INSTALLATION
DIAGRAM 3: WATER LINES
DIAGRAM 4: SOME TYPICAL DRAIN LINES
DIAGRAM 5: TYPICAL STEAM LINES
IMPORTANT
• Input water pressure must be 20-100 psi (138-689 kPa)
• If the generators are mounted in a place difcult for the home owner to access, the water supply shut-off valve should be located
where it can be quickly accessed in an emergency.
• Do not use a saddle valve or saddle tting for the water shut-off valve.
• Flush water supply line before nal hookup.