Master Spas Master Spas Series User manual

OWNER’S MANUAL

MASTER SPAS TWILIGHT OWNER’S MANUAL
1
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 information, please visit www.masterspas.com
and follow the links to the customer service section.
RECORD OF OWNERSHIP
Name ______________________________________________________________________
Address ____________________________________________________________________
City _____________________________________ State __________ Zip _______________
Date Purchased ______ /______ /_______
Model ______________________________ Serial # _______________________________
Dealer Name _______________________________________________________________
Phone # (______)________-__________
Service Tech Rep ____________________________________________________________
*SERIAL NUMBER LOCATION
The serial number for your spa is located in the filter area, on the spa system pack,
or on the listing plate on the skirting. It is a seven digit number. Ex. 1245900
6927 Lincoln Parkway
Fort Wayne, Indiana 46804
800-860-7727 • www.masterspas.com

TABLE OF CONTENTS
2
Safety Instructions................................................................................................. 3-10
Glossary of Spa Terminology....................................................................................11
Electrical Requirements ....................................................................................... 12-13
Wiring Schematic................................................................................................14
Site Preparation / General Guidelines ......................................................... 15-16
Installation Instructions......................................................................................17
Water Chemistry Terms You Should Know....................................................... 18-19
Spa Water Maintenance
ECO PUR Information .........................................................................................20
Water Quality Maintenance Start-Up ...............................................................21
Advantages of ECO PUR.....................................................................................22
Water Quality Maintenance Schedule – ECO PUR............................................23
Spa Water Maintenance Non ECO PUR
Spa Water Maintenance Start-Up................................................................ 24-26
Water Maintenance Trouble-Shooting Guide .........................................................27
Why Chemicals are Important in a Spa....................................................................28
Maintenance Recommendations ..............................................................................29
Winterizing Your Spa ................................................................................................30
Twilight Spa Specifications.......................................................................................31
Twilight Spa Controls
TS 6.1, TS 67.15, TS 7.1, TS 7.15 ................................................................... 32-47
Twilight Spa Controls
TS 67.25, TS 7.2, TS 7.25, TS 8.2,
TS 8.25, TS 8.3, TS 8.35, TS Fit, TS 240 ......................................................... 48-49
Twilight Spa Controls
TS 120 ............................................................................................................ 50-51
Diagnostic Messages ........................................................................................... 52-53
Spa Theater System (STS) ................................................................................... 54-55
Deluxe Fusion Audio System .............................................................................. 56-57
Spa Trouble-Shooting Guide............................................................................... 58-59
Regular Maintenance Procedures....................................................................... 60-61
Spa Care and Maintenance Record .................................................................... 62-65

3
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
understanding 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 Master Spas 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!

4
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.
SAFETY INSTRUCTIONS

5
IMPORTANT SAFETY
INSTRUCTIONS (CONT.)
(For units with GFCI)
WARNING – This product is provided with a ground-fault circuit interrupter locat-
ed 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 product should not oper-
ate. 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 possi-
bility 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 prevent
unauthorized access by children. To avoid accidents, ensure that children cannot 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 specific
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 suction
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 surfaces.
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 conduc-
tor 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 are considered safe for a healthy adult. Lower
water temperatures are recommended for young children and when spa use
exceeds 10 minutes.
SAFETY INSTRUCTIONS

6
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 pregnant
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.
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
SAFETY INSTRUCTIONS

7
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 compartment
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 2 feet of clearance around the perimeter 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 dis-
infected.
CAUTION – Safe temperatures for swimming or aquatic exercise is around 80˚F.
CAUTION – Risk of Electrical Shock. Do not leave audio compartment open.
Audio 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.
SAFETY INSTRUCTIONS

8
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 hard-
ware within 3m of the spa shall be bonded to the equipment grounding bus with cop-
per conductors not smaller than 8AWG.
SAVE THESE INSTRUCTIONS
SAFETY INSTRUCTIONS

9
WARNING: CHILDREN SHOULD NOT USE SPAS OR HOT TUBS WITHOUT ADULT
SUPERVISION
AVERTISSEMENT: NE PAS LAISSER LES ENFANTS UTILISER UNE CUVE DE RELAX-
ATION 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
HISTORY 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 ÉVENTU-
ELLE, 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 PHY-
SICIAN BEFORE USING A SPA OR HOT TUB.
AVERTISSEMENT: LES FEMMES ENCEINTES, QUE LEUR GROSSESSE SOIT CONFIR-
MÉE 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
SAFETY INSTRUCTIONS

10
WARNING: BEFORE ENTERING THE SPA OR HOT TUB MEASURE THE WATER TEM-
PERATURE 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
WARNING: DO NOT USE A SPA OR HOT TUB IMMEDIATELY FOLLOWING STRENU-
OUS 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, TÉLÉ-
PHONE, 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. 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.
SAFETY INSTRUCTIONS

GLOSSARY OF SPA TERMINOLOGY
11
1. DRAINING YOUR SPA. The drain is located behind the
front panel on the far right side. You can access the drain
by unscrewing the corner screws and removing the corner
panel. Grasp the drain cap, and pull the assembly out all
the way. Unscrew the cap, and push the assembly back in
half way to start the flow of water. Attach a garden hose,
if desired. Draining times may vary by model using the
external hose bib. A sump pump may also be used to
drain the spa quickly. NOTE: When pushing or pulling the
assembly in or out, water will drip from the drain during
the transition. This is normal.
2. JETS 1 PUMP. This pump produces water flow through the main jets in the
spa. This pump may be operated on two speeds. The low speed will produce
efficient water circulation and gentle jet action. High speed should be used
for maximum jet action. In spas not equipped with a 24 hour circulation
pump, this pump also moves water for the heat and filtration cycles.
3. JETS 2 PUMP. (If so equipped) This produces water flow through the
designated jets and has only one speed.
4. JETS 3 PUMP. (If so equipped) This produces water flow though the
designated jets and has one speed.
5. CIRCULATION PUMP. (If so equipped) This pump runs 24 hours a day and
moves water for heating and filtration. Spas equipped with this pump do not
have filtration cycles as they are not necessary in this configuration.
6. JET DIVERTER VALVE. Located on the topside of the spa, this valve physically
diverts the flow of water from one jet zone of the spa to another jet zone.
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.
7. PUMP UNION.These are used by service personnel to easily service the
jet pump(s).
8. HEATER UNION.These are used by service personnel to easily service the
spa heater assembly.
9. OZONATOR. Your ozone generator will operate
in conjunction with your filtration system. It will
deactivate when any other control function is manually
activated and will reactivate after one hour.
Ozonator (optional)

12
HAVE YOUR ELECTRICIAN READ THE FOLLOWING
INFORMATION BEFORE INSTALLATION BEGINS
Electrical connections made improperly, or the use of wire gauge sizes for
incurring power which are too small, may continually blow fuses in the
electrical equipment box, may damage the internal electrical controls an
components, may be unsafe and in any case will void your warranty.
It is the responsibility of the spa owner to ensure that electrical connec-
tions are made by a qualified electrician in accordance with the National
Electrical Code and any local and state electrical codes in force at the time
of installation.
These connections must be made in accordance with the wiring diagrams
found inside the control box. This equipment has been designed to oper-
ate on 60Hz. alternating current only, 120 volts arerequired. Make sure
that power is not applied while performing any electrical installation. A
copper bonding lug has been provided on theelectrical equipment pack to
allow connection to local ground points. The ground wire must be at least
14 AWG copper wire (unless local orstate codes require a heavier gauge
wire) and must be connected securelyto a grounded metal structure such
as a cold water pipe. All equipment packs are wired for 120 VAC only. The
only electrical supply for your spa must include a 15 AMP switch or circuit
breaker toopen all non-grounded supply conductors to comply with sec-
tion 422-20of the National Electrical Code. The disconnect must be readily
accessibleto the spa occupants, but installed at least five feet from the
spa. A Ground-Fault Circuit Interrupter (GFCI) (provided with the spa) must
be used to comply with section 680-42 of the National Electrical Code. A
ground fault is a current leak from any one of the supply conductors to
ground. A GFCI is designed to automatically shut off power to a pieceof
equipment when a ground fault is detected.
Power hook-up to the spa must be 120 volt 2 wire plus ground
(14 AWG copper).
Route the cable into the equipment area for final hook-up to terminals
inside the control panel. The spa must be hooked up to a “dedicated” 120
volt, 15 amp. The term “dedicated” means the electrical circuit for the spa
is not being used for any other electrical items (patio lights, appliances,
garage circuits, etc.). If the spa is connected to a non-dedicated circuit,
overloading will result in “nuisance tripping”which requires resetting of
the breaker switch at the house electrical panel.
Rev. 11/07
Permanently Connected Equipment Assembly with Pump(s), Heaters, Luminaine,
Ozone, Spa Side Control(s), Pump shut off device.
NOTE: Some of the above components may be optional or not available with
every spa model.
ELECTRICAL INSTALLATION REQUIREMENTS
For TS 120 Only

ELECTRICAL INSTALLATION REQUIREMENTS
For All Models Except TS 120
13
HAVE YOUR ELECTRICIAN READ THE FOLLOWING
INFORMATION BEFORE INSTALLATION BEGINS
Electrical connections made improperly, or the use of wire gauge sizes
for incurring power which are too small, may continually blow fuses in the
electrical equipment box, may damage the internal electrical controls and
components, may be unsafe and in any case will void your warranty.
It is the responsibility of the spa owner to ensure that electrical
connections are made by a qualified electrician in accordance with the
National Electrical Code and any local and state electrical codes in force
at the time of installation.
These connections must be made in accordance with the wiring
diagrams found inside the control box. This equipment has been
designed to operate on 60Hz. alternating current only, 240 volts are
required. Make sure that power is not applied while performing any
electrical installation. A copper bonding lug has been provided on the
electrical equipment pack to allow connection to local ground points.
The ground wire must be at least 8 AWG copper wire (unless local
or state codes require a heavier gauge wire) and must be connected
securely to a grounded metal structure such as a cold water pipe. All
Master Spas equipment packs are wired for 240 VAC only. The only
electrical supply for your spa must include a 50 AMP switch or circuit
breaker to open all non-grounded supply conductors to comply with
section 422-20 of the National Electrical Code. The disconnect must be
readily accessible to the spa occupants, but installed at least five feet
from the spa. A Ground-Fault Circuit Interrupter (GFCI) must be used to
comply with section 680-42 of the National Electrical Code. A ground
fault is a current leak from any one of the supply conductors to ground.
A GFCI is designed to automatically shut off power to a piece of
equipment when a ground fault is detected.
Power hook-up to the spa must be 240 volt 3 wire plus ground
(6 AWG copper) 8 AWG copper ground wire.
Route the cable into the equipment area for final hook-up to terminals
inside the control panel. The spa must be hooked up to a “dedicated”
240 volt, 50 amp breaker and GFCI. The term “dedicated” means the
electrical circuit for the spa is not being used for any other electrical items
(patio lights, appliances, garage circuits, etc.). If the spa is connected to
a non-dedicated circuit, overloading will result in “nuisance tripping”
which requires resetting of the breaker switch at the house
electrical panel.
Rev. 11/11
Permanently Connected Equipment Assembly with Pump(s), Heaters, Luminaine,
Ozone, Spa Side Control(s), Pump shut off device, and Audio/Video Components.
NOTE: Some of the above components may be optional or not available with
every spa model.

WIRING SCHEMATIC - 240 VOLT SPA HOOK-UP
14
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
50 5050
TEST
50
1
2
3
4
5
WHITE (NEUTRAL)
BLACK (HOT)
RED (HOT)
GREEN (GROUND)
Instruments
Balboa
Incorporated
Wire Key
House Breaker Box
G.F.C.I Breaker Box
Spa System Box
Green (Ground)
Red (Hot)
Black (Hot)
White (Neutral)
NOTE: For a 240 V
dedicated hook-up, the
white neutral wire is
not required between
the G.F.C.I. and the
system box.
GRN
GRN (GROUND)
RED (HOT)
BLK (HOT)
BLK (HOT)
RED (HOT)
RED (HOT)
WHT (NEUTRAL)
WHT
WHT
BLK (HOT)
GRN (GROUND)
TB1
IDF00007.mac 6/17/97
* Actual wiring of GFCI will vary by manufacturer of GFCI. The GFCI shown is a
Square D. Improper wiring of GFCI may result in permanent damage to spa system box.
Repair / replacement of spa system box is not covered under warranty when damage
results from improper wiring.

SITE PREPARATION / GENERAL GUIDELINES
15
Portable spa installation is simple when properly planned. To that end, it is
important that you read the following 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 measure side yard dimensions, gates or doors and vertical
obstructions such as roof overhangs and overhead cables. Any other space
limiting obstacles such as trees or shrubs must be evaluated.
2) If the spa is being installed indoors, dimension limitations such as stairs,
ceilings and walls must be taken into consideration. Please have your
Master Spas dealer or delivery service review site or installation plans
prior to delivery.
3) 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
reinforcement bars crossed throughout the pad.
4) GFCI ( For TS120 only) - Your spa is equipped with a 15 amp GFCI cord that
must be plugged into a dedicated 15 amp electrical outlet. This cord is located
inside the spa behind the front skirt panel. Before operating the spa first
remove the cord by cutting the plastic ties that secure it during shipping.
Bring the cord outside of the spa and insert the cord in the “U” shaped
channel provided below the front skirt panel area. Note: For Canadian spas
the GFCI cord is not attached to the equipment pack and will have to be
attached by a licensed electrician.
IMPORTANT
When installing your spa indoors, on a wood deck, or balcony, the same
load requirements must be met. Total load may be as much as 90 pounds per
square foot. You should speak with a qualified contractor or your local building
department to confirm that your surface is adequate for supporting a spa.
Be sure to locate your spa so that equipment remains above grade and is
not subject to flooding.
The equipment side(s) of the spa must be accessible in the event that
future service is needed. Periodical maintenance checks require entry into
the equipment bay. When possible, it is wise planning for the future to leave
2 feet of access to all sides of the spa in the event your spas plumbing requires
maintenance. Your spa warranty does not cover the cost of providing access
for service.

SITE PREPARATION / GENERAL GUIDELINES
16
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.
Here again, with proper planning, no matter what room your spa goes in, it will
be your favorite room.
• Work with your Master Spas dealer and contractor to insure all local building,
electrical and plumbing codes are met
• Plan for a floor drain to drain off excess water or 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

INSTALLATION INSTRUCTIONS
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1.) Put spa in final position that allows for access to equipment
and spa components.
2.) Remove front side panel (this is the side where the
main topside control panel is located) so the electrical
service can be hooked up to the spa system pack. The
panels can be taken off by first removing the three
black thumb screws located on each corner. On the
center panel there are four #2 Phillips screws that are
covered with a colored snap cap. Remove the caps to
access the screws for removal.
3.) Fill spa at least 1” above the filters. We recommend filling
the spa through the filter area.
4.) Turn the power on to the spa. Spa will go through its priming mode.
This lasts approximately 5 minutes.
5.) It may be necessary to bleed air from the pump(s) on your spa if, after start
up, your spa pumps do not operate.
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 an airlock situation, loosen the union (see picture) 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.
6.) Adjust water chemistry according to the instructions provided in the
“Spa Water Maintenance Section”.
7.) Your spa water will heat approximately 4˚ – 7˚ per hour for the 240 volt spas.
The Fit due to the large body of water contained will heat approximately
1˚ – 2˚ per hour. Heating times may vary depending on the spas size and
whether the cover it installed.
RELAX AND ENJOY.
Pump Union
Airlock

WATER CHEMISTRY TERMS YOU SHOULD KNOW
Before jumping into the Spa Water Maintenance, here are some terms to help you.
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1. Parts per million, or ppm: This is a form of measurement used in most pool
or spa chemical readings. Best described as any one million like items of equal
size and make up, next to one unlike item , but of equal size. This would be
one part per million.
2. Average size spa: What is it? The national spa and pool institute (NSPI)
states; 350 to 400 U.S. gallons is average. As a general rule, chemical dosages
are the same for any spa between 100 and 500 U.S. gallons. Spas over 500
U.S. gallons the dosage would be double. Under 100 U.S. gallons would be
on a case by case basis.
3. Total Alkalinity: This is a measurement of the ability of the water to resist
changes in pH. Put another way, it is the water’s ability to maintain proper
pH. Total alkalinity is measured in parts per million from 0 to 400 plus, with
80 to 150 ppm being the best range for spas. With low alkalinity, the pH will
flip, or change back and forth, and be hard to control. With high alkalinity it
becomes extremely difficult to change the pH.
4. pH or potential hydrogen: This is a measurement of the active acidity in the
water, or it is the measurement of the concentration of active hydrogen ions
in the water. The greater the concentration of active hydrogen ions, the
lower the pH. pH is not measured in parts per million, but on a scale from
0 to 14, with 7 being the neutral. In spas when ever possible, a measurement
between 7.2 and 7.8 is best. Whenever possible, it should be between 7.4
and 7.6. With low pH, the results can be corroded metals, etched and stained
plaster, stained fiberglass or acrylic, eye / skin irritation, rapid chlorine or bro-
mine loss, and total alkalinity destruction. With high pH, the results can be
cloudy water, eye / skin irritation, scale formation and poor chlorine or bro-
mine efficiency.
5. Shocking: This is when you add either extra chlorine (superchlorinate)
by raising the chlorine level above 8 ppm, or add a non-chlorine shock
(potassium monoperoxysulfate or potassium monopersulfate) to burn off the
chloramines or bromamines. A non-chlorine shock acts by releasing oxygen
in the water, which serves the same function as chlorine. The advantage to
using non-chlorine shock, is you can enter the water within 15 minutes after
shocking. Using chlorine, you must wait until the total chlorine reading is
below 5 ppm. One thing to remember, a non-chlorine shock will not kill
bacteria or disinfect.
6. Sequestering: This can be defined as the ability to form a chemical
complex which remains in solution, despite the presence of a precipitating
agent (i.e. calcium and metals). Common names for sequestering chemicals
are; minquest, stain and scale control, metal-x, spa defender, spa metal
gone, (etc.).