Master Spas legacy whirlpool User manual

OWNER’S MANUAL

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MASTER SPAS OWNER’S MANUAL
Welcome To Ultimate Relaxation!
Thank you for choosing your new spa built by Master Spas. Please read the entire Owner’s Manual
before installing and using your spa. The goal of this manual is to provide you with safety and
operational information plus some tips that will help you enjoy your spa to its fullest.
At the time of print, this manual is accurate in its information. Master Spas reserves the right
to change or improve its product without prior notice. To check on updates or for other informa-
tion, please visit www.masterspas.com and follow the links to the customer support section.
Record Of Ownership
Name��������������������������������������������������������������������������������
Address������������������������������������������������������������������������������
City ��������������������������������������������������������� State ������ Zip ���������
Phone # (������)��������-���������� Date Purchased ������ /������ /�������
Model ��������������������������������� Serial #���������������������������������������
Dealer Name �������������������������������������������������������������������������
Service Tech Rep ����������������������������������������������������������������������
Serial Number Location
The serial number for your spa is located near the filter area, on the spa system pack, or on the
listing plate on the skirting. It is a seven digit number. Ex. 1612345
Register Your Spa
Please be sure to register your spa so we can efficiently assist with any questions you may have.
Until your spa has been registered, Master Spas Inc. will not have record of your ownership.
To register your spa, visit www.MasterSpas.com and access our Owner’s Support within the
Resources tab link on the page. This area will offer online registration capability along with other
support information.
6927 Lincoln Parkway
Fort Wayne, Indiana 46804
www.masterspas.com

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TABLE OF CONTENTS
Table of Contents................................................................................................................... 2
Safety Instructions ............................................................................................................ 3-10
Glossary of Spa Terminology ........................................................................................... 11-13
Site Preparation / General Guidelines .............................................................................. 14-16
Installation Instructions................................................................................................... 17-18
The Advantages of Eco-Pur Filtration.................................................................................... 19
Water Chemistry Terms You Should Know ....................................................................... 20-21
Why are Chemicals Important in a Spa.................................................................................. 22
Water Maintenance......................................................................................................... 23-26
Start-Up........................................................................................................................ 23
Schedule.................................................................................................................. 24-25
Trouble-shooting Guide................................................................................................. 26
Regular Maintenance Procedures..................................................................................... 27-31
Spa Trouble-shooting Guide ............................................................................................ 32-33
Winterizing & Storing your Spa............................................................................................. 34
Spa Care and Maintenance Record................................................................................... 35-37
Electrical Requirements................................................................................................... 39-42
Configuration 1........................................................................................................ 39-40
Configuration 2........................................................................................................ 41-42
Model Specifications ............................................................................................................ 42
Spa Controls – 120V Models............................................................................................ 43-46
Spa Controls ................................................................................................................... 47-56
WI-Fi Module (if equipped)................................................................................................... 57
Deluxe Fusion Air Stereo Option (if equipped) ................................................................. 58-60

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SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Included with your new spa is a safety sign. The sign is for you and your guest’s protection
and is suitable for outdoor use in wet locations. The sign should be placed in a location visible
to all users of the spa.
Please take time to point out the physical location of the safety sign and the importance of
the safety precautions displayed on the safety sign to all of your guests. Remember, your safety
and the safety of anyone who enjoys the use of your spa is our utmost concern.
The sign should be mounted with screws or another type of permanent fastener. Additional
or replacement signs can be obtained from your dealer or direct from the factory.
INTRODUCTION
It’s time to relax! You now have your very own portable spa by Master Spas, Inc. By fully under-
standing the operation of each of the features of your new Master Spa, you will be assured of
many years of hassle-free, hot water therapy and fun.
Your safety is of paramount importance to the MasterSpas family. We urge you to read and
become thoroughly familiar with all safety aspects addressed in this manual.
Through reading and totally understanding the important information in your owner’s manual, you
will realize that you now own THE ULTIMATE RELAXATION MACHINE!

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SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
When installing and using this electrical equipment, basic safety precautions should
be observed including the following:
READ AND FOLLOW ALL
INSTRUCTIONS
WARNING – To reduce the risk of injury, do not permit children to use this product
unless they are closely supervised at all times.
A wire conductor is provided on this unit to connect a minimum 6 AWG
(13.302mm2) solid copper conductor between this unit and any metal equipment,
metal enclosures of electrical equipment, metal water pipe, or conduit within 5 feet
(1.5m) of the unit
(For cord-connected/convertible units)
DANGER – Risk of injury.
a) Replace damaged cord immediately.
b) Do not bury cord.
c) Connect to a grounded, grounding type receptacle only.
(For units intended for indoor use only)
WARNING – For indoor use only. This unit is not intended for outdoor use.
(For units intended for outdoor use only)
WARNING – For outdoor use only. This unit is not intended for indoor use.

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SAFETY INSTRUCTIONS
IMPORTANT SAFETY
INSTRUCTIONS (CONT.)
(For units with GFCI)
WARNING – This product is provided with a ground-fault circuit interrupter
located on the front panel of selected swim spas and on the power cord of
120 volt convertible spas. The GFCI must be tested before each use. With the
product operating, open the service door. When the product stops operating,
this merely indicates that the door is equipped with an electrical interlock.
Next, push the test button on the GFCI and close the service door. The prod-
uct should not operate. Now open the service door, push the reset button
on the GFCI and close the service door. The product should now operate
normally. When the product fails to operate in this manner, there is a ground
current flowing indicating the possibility of an electric shock. Disconnect the
power until the fault has been identified and corrected.
DANGER – Risk of Accidental Drowning. Extreme caution must be exercised to pre-
vent unauthorized access by children. To avoid accidents, ensure that children can-
not use this spa unless they are supervised at all times.
DANGER – Risk of Injury. The suction fittings in this spa are sized to match the spe-
cific water flow created by the pump. Should the need arise to replace the suction
fittings or the pump, be sure that the flow rates are compatible.
Never operate spa if the suction fittings are broken or missing. Never replace a suc-
tion fitting with one rated less than the flow rate marked on the original suction
fitting.
DANGER – Risk of Electric Shock. Install at least 5 feet (1.5m) from all metal sur-
faces. As an alternative, a spa may be installed within 5 feet of metal surfaces if
each metal surface is permanently connected by a minimum 8AWG (8.4mm2) solid
copper conductor to the wire connector on the terminal box that is provided for
this purpose.
DANGER – Risk of Electric Shock. Do not permit any electric appliance, such as a
light, telephone, radio, or television, within 5 feet (1.5 m) of a spa.
WARNING – To reduce the risk of injury:
a) The water in a spa should never exceed 40˚C (104˚F). Water temperatures
between 38˚C (100˚F) and 40˚C (104˚F) are considered safe for a healthy
adult. Lower water temperatures are recommended for young children and
when spa use exceeds 10 minutes.

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SAFETY INSTRUCTIONS
IMPORTANT SAFETY
INSTRUCTIONS (CONT.)
b) Since excessive water temperatures have a high potential for causing fetal
damage during the early months of pregnancy, pregnant or possibly preg-
nant women should limit spa water temperatures to 38˚C (100˚F).
c) Before entering a spa, the user should measure the water temperature
since the tolerance of water temperature- regulating devices varies.
d) The use of alcohol, drugs, or medication before or during spa use may lead
to unconsciousness with the possibility of drowning.
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 spa.
f) Persons using medication should consult a physician before using a spa
since some medication may induce drowsiness while other medication may
affect heart rate, blood pressure, and circulation.
(For spas with a gas heater)
WARNING – Risk of Suffocation. This spa is equipped with a gas heater and
is intended for outdoor use only unless proper ventilation can be provided for
an indoor installation.
HYPERTHERMIA
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:
• Dizziness • Fainting • Drowsiness • Lethargy
• Increase in Internal Body Temperature
THE EFFECTS OF HYPERTHERMIA INCLUDE:
Unawareness of Impending Hazard • Failure to Perceive Heat • Failure to
Recognize the Need to Exit Spa • Physical Inability to Exit Spa • Fetal Damage
in Pregnant Women • Unconsciousness Resulting in a Danger of Drowning

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SAFETY INSTRUCTIONS
IMPORTANT SAFETY
INSTRUCTIONS (CONT.)
DANGER – To reduce the risk of injury to persons, do not remove the suction
grate. Suction through drains and skimmers is powerful when the jets in the spa
are in use. Damaged covers can be hazardous to small children and adults with
long hair. Should any part of the body be drawn into these fittings, turn off the
spa immediately. As a precaution, long hair should not be allowed to float in the spa.
WARNING – Install the spa so that water can be easily drained out of the compart-
ment containing electrical components so as not to damage equipment. When
installing the spa make sure to allow for an adequate drainage system to deal with
any overflow water. Please allow for at least 3 feet of clearance around the perim-
eter of the spa to provide enough room to access for servicing. Contact your local
dealer for their specific requirements.
WARNING – The spa should be covered with an approved locking cover when not
in use, to prevent unauthorized entry and injuries.
WARNING – People with infections, sores or the like should not use the spa. Warm
and hot water temperatures may allow the growth of infectious bacteria if not
properly disinfected.
CAUTION – Safe temperatures for swimming or aquatic exercise is around 80˚F
(26.7˚C).
CAUTION – Risk of Electrical Shock. Do not leave audio compartment open.
Audio CD controls are not to be operated while inside the spa.
CAUTION – Replace components only with identical components.
WARNING – Risk of Electric Shock. Do not connect any auxiliary components (for
example, additional speakers, headphones, additional audio/ video components
etc.)
to the system. These units are not provided with an outdoor antenna.
Do not service this product yourself as opening or removing covers may expose
you to dangerous voltage or other hazards. Refer all servicing to qualified service
personnel.
If the power supply cord(s) are damaged, water is entering the speaker, audio
compartment, or any other component in the electrical equipment compartment
area, the protective shield is showing signs of deterioration, or there are signs of
other potentially hazardous damage to the unit, turn off the circuit breaker from
the wall and refer servicing to qualified personnel.

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SAFETY INSTRUCTIONS
IMPORTANT SAFETY
INSTRUCTIONS (CONT.)
The unit should be subjected to periodic routine maintenance once every quarter to
make sure that the it is operating properly.
DANGER – Risk of Electric Shock. A green colored terminal or a terminal marked G,
GR, Ground, Grounding or the symbol shown in Figure 14.1 of UL 1563 is located
inside the supply terminal box or compartment. To reduce the risk of electric shock,
this terminal must be connected to the grounding means provided in the electric
supply service panel with a continuous copper wire equivalent in size to the circuit
conductors supplying this equipment.
At least two lugs marked “Bonding Lugs” are provided on the external surface
or on the inside of the supply terminal box or compartment. To reduce the risk
of electric shock, connect the local common bonding grid in the area of the spa
to these terminals with an insulated or bare copper conductor not smaller than
8AWG.
All field installed metal components such as rails, ladders, drains, or other similar
hardware within 3m of the spa shall be bonded to the equipment grounding bus
with copper conductors not smaller than 8AWG.
SAVE THESE INSTRUCTIONS

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SAFETY INSTRUCTIONS
WARNING: CHILDREN SHOULD NOT USE SPAS OR HOT TUBS WITHOUT ADULT SUPERVI-
SION
AVERTISSEMENT: NE PAS LAISSER LES ENFANTS UTILISER UNE CUVE DE RELAXATION
SANS SURVEILLANCE
WARNING: DO NOT USE SPAS OR HOT TUBS UNLESS ALL SUCTION GUARDS ARE
INSTALLED TO PREVENT BODY AND HAIR ENTRAPMENT.
AVERTISSEMENT: POUR ÉVITER QUE LES CHEVEUX OU UNE PARTIE DU CORPS
PUISSENT ÊTRE ASPIRES, NE PAS UTILISER UNE CUVE DE RELAXATION SI LES GRILLES DI PRISE
D’ASPIRATION NE SONT PAS TOUTES EN PLACE
WARNING: PEOPLE USING MEDICATIONS AND/OR HAVING AN ADVERSE MEDICAL HIS-
TORY SHOULD CONSULT A PHYSICIAN BEFORE USING A SPA OR HOT TUB.
AVERTISSEMENT: LES PERSONNES QUI PRENNENT DES MÉDICAMENTS OU ONT
DES PROBLÉMES DE SANTÉ DEVRAIENT CONSULTER UN MÉDECIN AVANT D’UTILISER UNE CUVE
DE RELAXATION
WARNING: PEOPLE WITH INFECTIOUS DISEASES SHOULD NOT USE A SPA OR HOT TUB
AVERTISSEMENT: LES PERSONNES ATTEINTES DE MALADIES INFECTIEUSES NE
DEVRAIENT PAS UTILISER UNE CUVE DE RELAXATION
WARNING: TO AVOID INJURY EXERCISE CARE WHEN ENTERING OR EXITING THE SPA OR
HOT TUB.
AVERTISSEMENT: POUR ÉVITER DES BLESSURES, USER DE PRUDENCE EN ENTRANT
DANS UNE CUVE DE RELAXATION ET EN SORTANT
WARNING: DO NOT USE DRUGS OR ALCOHOL BEFORE OR DURING THE USE OF A SPA
OR HOT TUB TO AVOID UNCONSCIOUSNESS AND POSSIBLE DROWNING
AVERTISSEMENT: POUR ÉVITER L’ÉVANOUISSEMENT ET LA NOYADE ÉVENTUELLE, NE
PRENDE NI DROGUE NI ALCOOL AVANT D’UTILISER UNE CUVE DE RELAXATION NI QUAND ON S’Y
TROUVE
WARNING: PREGNANT OR POSSIBLY PREGNANT WOMEN SHOULD CONSULT A PHYSI-
CIAN BEFORE USING A SPA OR HOT TUB.
AVERTISSEMENT: LES FEMMES ENCEINTES, QUE LEUR GROSSESSE SOIT CONFIRMÉE
OU NON, DEVRAIENT CONSULTER UN MÉDECIN AVANT D’UTILISER UNE CUVE DE RELAXATION
WARNING: WATER TEMPERATURE IN EXCESS OF 38˚C MAY BE INJURIOUS TO YOUR
HEALTH
AVERTISSEMENT: IL PEUT ÊTRE DANGEREUX POUR LA SANTÉ DE SE PLONGER DANS
DE L’EAU A PLUS DE 38˚C
WARNING: BEFORE ENTERING THE SPA OR HOT TUB MEASURE THE WATER TEMPERA-
TURE WITH AN ACCURATE THERMOMETER
AVERTISSEMENT: AVANT D’UTILISER UNE CUVE DE RELAXATION MESURER LA
TEMPÉRATURE DE L’EAU À L’AIDE D’UN THERMOMÉTRE PRÉCIS

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SAFETY INSTRUCTIONS
WARNING: DO NOT USE A SPA OR HOT TUB IMMEDIATELY FOLLOWING STRENUOUS
EXERCISE
AVERTISSEMENT: NE PAS UTILISER UNE CUVE DE RELAXATION IMMÉDIATEMENT
APRÉS UN EXERCISE FATIGANT
WARNING: PROLONGED IMMERSION IN A SPA OR HOT TUB MAY BE INJUROUS TO YOUR
HEALTH
AVERTISSEMENT: L’UTILISATION PROLONGÉE D’UNE CUVE DE RELAXATION PEUT
ÊTRE DANGEREUSE POUR LA SANTÉ
WARNING: DO NOT PERMIT ELECTRIC APPLIANCES (SUCH AS LIGHT, TELEPHONE, RADIO,
OR TELEVISION) WITHIN 1.5 M OF THIS SPA OR HOT TUB
AVERTISSEMENT: NE PAS PLACER D’APPAREIL ÉLECTRIQUE (LUMINAIRE, TÉLÉPHONE,
RADIO, TÉLÉVISEUR, ETC) À MOINS DE 1.5 M DE CETTE CUVE DE RELAXATION
CAUTION: MAINTAIN WATER CHEMISTRY IN ACCORDANCE WITH MANUFACTURER’S
INSTRUCTION
ATTENTION: LA TENEUR DE L’EAU EN MATIÉRES DISSOUTES DOIT ÊTRE CONFORME AUX
DIRECTIVES DU FABRICANT
Hyperthermia occurs when the internal temperature of the body reaches a level several degrees
above the normal body temperature of 37˚C (98.6˚F). The symtoms of hyperthermia include
drowsiness, lethargy, and an increase in the internal temperature of the body. The effects of
hyperthermia include
(a) unawareness of impending hazard;
(b) failure to perceive heat;
(c) failure to recognize the need to exit spa;
(d) physical inability to exit spa;
(e) fetal damage in pregnant women; and
(f) unconsciousness and danger of drowning.
WARNING: THE USE OF ALCOHOL OR DRUGS CAN GREATLY INCREASE THE RISK OF
FATAL HYPERTHERMIA IN HOT TUBS AND SPAS
LA CONSOMMATION D’ALCOOL OU DE DROGUE AUGMENTE CONSIDÉRABLEMENT LES
RISQUES D’HYPERTHERMIE MORTELLE DANS UNE CUVE DE RELAXATION.

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GLOSSARY OF SPA TERMINOLOGY
Your new Master Spa features a variety of jets. All jets, regardless of style return the water to the
spa. Air is mixed with the water by using the air controls (if equipped) creating a gentle to most
vigorous massage. Water flow is adjusted by simply turning the outer face of the jet. Your Master
Spa may have a combination of pulsating, rotating, dual pulsating and directional adjustable jets.
1. THERAPY JETS
Located throughout the seats of the spa to offer a variety of therapy combinations.
2. NECK JETS (if equipped)
Located above the normal water level to provide massaging action to the back of the neck.
3. SHOULDER JETS (if equipped)
Located above the normal water level to provide massaging action to the shoulders.
4. MASTER BLASTER FOOT THERAPY JET (if equipped)
Large jet with several fixed nozzles located in the bottom of the spa near the floor to provide
excellent massage to the feet.
5. JET DIVERTER VALVE (if equipped)
Located on the top flange of the spa, this large valve physically diverts the flow of water from
one group of jets to another. Be sure that no sand or particles are brought into the spa as they
will cause the diverter to seize up. It is best to turn the diverter valve only when the pump is
turned off.
6. WATER FEATURE VALVE (if equipped)
Located on the top flange of the spa, this smaller valve adjusts water flow to the waterfalls and/
or water features in your spa.
NOTE: When the spa is not in use, this valve should be turned mostly shut (not completely shut)
to prevent the water features from allowing water to hit the cover while it is closed. If
left mostly open, water may hit the cover and possibly run out of the spa causing water
loss.
7. AIR CONTROL VALVE
These smaller valves are located around the top of your spa. You may increase or decrease the
force of your jets by opening or closing the air control valves. Each air control valve will typi-
cally function 1 to 2 groups or seats of jets in the spa. When not in use the air controls should
be kept in the closed position as the air being introduced in to the water can tend to cool the
water and increase the dissipation rate of sanitizer levels.
8. TOPSIDE CONTROL PANEL
You may safely control spa functions from inside or outside your spa using the Topside Control
Panel. This Panel is used to control the water temperature, pumps, the spa light, automatic
filtration cycles and other advanced functions. The digital display will give you a constant tem-
perature readout and will notify you in case of certain malfunctions. Several user programmable
functions are also available.

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GLOSSARY OF SPA TERMINOLOGY
9. PERSONAL REMOTE CONTROL (if equipped)
Select spa models may have an additional remote which allows the user to control the jet
therapy while remaining in the seat (if applicable). By pressing the control one time, you will
activate the pump. Press again for high speed and again to turn it off.
10. EQUIPMENT ACCESS PANEL
This is the skirt panel located below the Topside Control Panel. This area houses the major-
ity of components responsible for the spas operation. These components include the pumps,
heater, spa control system, ozonator (if equipped), and LED light system (if equipped). Pump
and equipment placement may vary by model.
11. ACCESS PANELS
These are the skirt panels located around all four sides of the spa. All of the skirt panels are
removable should service be required. Master Spas recommends at least 3 feet of access be
provided around the spa.
12. FILTER LID
This lid fits over the filter area and weir gate to cover the filters. Remove filter lid to access
filters for maintenance.
14. WEIR GATE
The weir gate is the horizontal door located in front of the filters that helps keep debris
trapped in the filter area
15. SPA CONTROL SYSTEM
This houses the wiring and electrical components necessary to operate the spa.
16. SPA HEATER
This is an electric heater housed in a stainless steel tube. It is thermostatically controlled and
equipped with high-limit temperature safety shut-off sensors.
17. SLICE VALVES
These valves are used by service personnel to shut off water
to the heating system (heater and pump plumbed to the
heater) so that the spa water does not need to be drained
if the spa requires service to the heating system (varies by
model).
NOTE: Slice valves must be completely open during normal
operations.
Slice Valve and Pump Union

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GLOSSARY OF SPA TERMINOLOGY
18. MAIN THERAPY PUMP
This produces water flow through the main jets in the spa. The first pump may be operated
on two speeds (varies by model). Low speed (if applicable) will produce efficient water circu-
lation during filtration, heating of the spa water, and gentle jet action. High speed provides
maximum jet action. The main pump is controlled by the “Jets” or “Jets I” button on the
Topside Control Panel.
19. SECONDARY THERAPY PUMP (if equipped)
This produces water flow through 1 to 2 groups or seats of jets in the spa. The second pump
operates similar to the main pump and is controlled by the “Jets II” or “Aux” button on the
Topside Control Panel.
20. THIRD THERAPY PUMP (if equipped)
This produces water flow through 1 to 2 groups or seats of jets in the spa. This is controlled
by the Jets III button on the Topside Control Panel.
21. CIRCULATION PUMP (if equipped)
This produces water flow through the heater in the spa and provides the water flow
necessary to actuate the ozone injector. This energy efficient pump typically runs 24 hours
for efficient filtration and heating.
22. PUMP UNION
These are used to help relieve possible pump air locks or for service personnel to easily service
the pumps.
23. HEATER UNION
These are used by service personnel to easily service the heater.

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SITE PREPARATION / GENERAL GUIDELINES
Portable spa installation is simple when properly planned. It is important that you read the follow-
ing information carefully and consult with your Master Spas dealer.
1) Access - The actual dimensions of your new spa will determine the amount of space that is
needed in moving the spa from curbside to its final installation area. Be sure to consider and
measure side yard dimensions, gates, doors, overall room dimensions and vertical obstruc-
tions such as ceilings, roof overhangs, balconies and overhead cables. Any other space limiting
obstacles such as stairs, trees, and shrubs must also be evaluated. Please be sure to contact and
review these site and installation plans with your Master Spas dealer prior to delivery.
2) Surface/Pad Requirements - When your new spa is filled with water and bathers, it may weigh
as much as several tons. It is imperative that the base beneath the spa can support the entire
weight. The spa must be on a uniformly firm, continuous, and level surface. The recommended
foundation is a concrete pad with a minimum thickness of four (4) inches with steel reinforce-
ment bars crossed throughout the pad.
IMPORTANT
When installing your spa indoors, on a wood deck, roof or balcony; load requirements need to be
evaluated before installation. You should speak with a qualified contractor or your local building
department to confirm that your surface is adequate for supporting a spa.
All sides of the spa must be accessible for regular maintenance or in the event that service is
needed. Periodical maintenance checks require entry into the equipment bay. When possible, it is
wise planning for the future to leave 3 feet of access to all sides of the spa in the event your spa
requires maintenance. Your spa warranty does not cover the cost of providing access for service.
GENERAL CONSIDERATIONS FOR OUTDOOR INSTALLATION
Again, proper planning will increase your total enjoyment factor with your new spa. Listed below
are some additional items to consider when planning your installation.
• How spa will complement landscaping
and vice versa
• View from inside spa and view of spa from
inside of home
• Exposure to sunlight and shading from trees
• Privacy
• Getting to spa from house and return
• Proximity to dressing rooms and bathrooms
• Storage for spa chemicals
• Local building codes (if applicable)
• Power cable
GENERAL CONSIDERATIONS FOR INDOOR INSTALLATION
Installing your spa indoors creates an entirely different set of considerations.
• Work with your Master Spas dealer and
contractor to insure all local building, electri-
cal and plumbing codes are met
• Plan for a floor drain to drain off excess water
and for draining and cleaning your spa
• A ventilation fan may be necessary due
to high humidity created by your spa
• Finished material in your spa room should
also be capable of withstanding increased
humidity

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SITE PREPARATION / GENERAL GUIDELINES
GUIDELINES FOR PARTIALLY OR FULLY RECESSED INSTALLATION
Spas manufactured by Master Spas, Inc. are designed to be installed in a variety of settings. One
of which is installing below grade. Should a spa be installed below the level of the site drainage
system (below grade), a system for preventing water collecting and pooling must be designed
based on the requirements of the local authority having jurisdiction. The drainage system must
be designed based on things such as rainfall, water runoff, splashing, draining the spa, etc. that
could potentially feed the below grade area with water. Where located in designated floodways,
additional attention to maximum water load entering the area below grade must be addressed to
prevent water from accumulating below grade at all times. It is generally recommended that the
spa be installed above grade because the spa is not designed to be submerged in water. When a
proper drainage system is designed based on the characteristics of the site, installing the spa below
grade is an accepted method of installation.
• The unit is self-supporting when placed on a surface designed to support the full load of the spa
(see Surface/Pad Requirements). Do not backfill with sand, gravel, or earth. Doing so will void
the warranty.
• Plan for complete drainage so standing water never reaches the electrical equipment.
• Plan for appropriate ventilation so the equipment doesn’t overheat.
• Provide a minimum of 3 feet service area around the perimeter of the unit. Site access issues are
not covered by the product warranty.
• The unit is not designed to be submerged in water. Water entering the equipment area creates
many hazards and resulting damage will not be covered by the product warranty.
• Make sure that the surroundings do not create any additional hazards.
• Surfaces placed around the unit should also be evaluated for walking/slipping hazards from
standing water. Proper drainage is vital to the installation of a below grade installation.
• Check all building, electrical, and plumbing codes with the authority having jurisdiction to ensure
that your installation is in compliance with all local codes.
• Additional consideration needs to be made when installing unit in designed floodways.
• Verify that site specific drainage systems such as down spouts are not going to feed the area
below grade.
• Below grade drainage system needs to be evaluated based on area specific rainfall. One size
does not fit all so an analysis by a qualified, local engineer to ensure proper drainage of all sourc-
es of water is a must when installing below grade.

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INSTALLATION INSTRUCTIONS
1. Put spa in final position that allows for access to equipment and spa components. Master
Spas recommends that at least 3 feet of space be provided around all sides of the spa for
access. This provides adequate space for regular maintenance and service.
2. Remove front skirt panel (this is the side where the topside control panel is located) so
electrical can be hooked up to the spa control system. This panel is removed by unscrewing
the screws securing the skirt corners and the front skirt panel.
3. With the front skirt panels removed allowing access to the equipment, be sure all pump and
heater unions are secure. Each pump has 2 unions and the heater has 2 unions. A newly
delivered spa may have loose unions caused in transporting the spa. Check that all slice valves
are open, in the up position. The slice valves may become closed during transportation of the
spa.
4. Fill spa at least 1” above the filters or to the minimum water level indication located near the
filter area. We recommend filling the spa through the filter area.
5. Turn the power on to the spa. Spa will initially display Priming Mode or “Pr”. This lasts
approximately 5-6 minutes. This time is provided to allow each of the pumps to be activated
and checked to ensure they are not air locked from the spa being filled.
6. Be sure the adjustable jets in your spa are open by turning the face of the jet. Most of the jets
in your spa are adjustable and removable by turning the face of the jet.
Slice Valve
and Pump Union

18DO NOT DIVE.
101DO NOT DIVE.
INSTALLATION INSTRUCTIONS
7. It may be necessary to bleed air from the pump(s) in your spa if, after start up, your spa
pumps are turning on and off but you do not have water flow from the jets in your spa.
Due to the nature of water flow and hydro-therapy pumps, please be advised that air locking
of pumps may occur. Master Spas has taken measures to reduce the possibility of this, but it
still may occur, especially after refilling a spa. This is not a service covered under warranty.
To relieve and airlock, loosen the union on the discharge of the pump (see arrow on picture
of pump below). Water should leak out. Tighten the union and test the pump for proper jet
flow. If needed repeat process.
Airlock
Pump Union
Slice Valve
8. Adjust water chemistry according to the instructions provided in the “Water Maintenance”
section.
9. Your spa water will heat approximately 3 to 4 degrees Fahrenheit per hour (1 to 2 degrees
Celsius) with the cover placed on the spa. This varies depending on the size of the spa and
ambient temperatures.
10. Step into the soothing waters of your Master Spa!
Relax and enjoy.