United Spa Controls C5 Series Guide

T8-S To
p
side
Installation Manual & User’s Guide
For C5 Series Spa Controls with the T8-S Topside
Revision 06.19

Disclaimers
1
End User Disclaimer:
United Spa Controls systems have absolutely no end user
serviceable parts. United Spa Controls does not authorize attempts
by the spa owner/user to install or repair/service any United Spa
Controls products.
Non-qualied users should never open or remove the control box’s
cover, as this will expose dangerous voltage points and other
serious risks.
Non-qualied users should not attempt to make changes to
the topside’s programming, as mis-programming can result in
malfunction or possible damage.
Please contact your dealer or a locally licensed service center for
service and technical support.
Warranty Disclaimer:
It is extremely important that any user read this user’s guide in
it’s entirety before attempting to operate this United Spa Controls
system. Any damage that may occur due to misuse may void the
warranty. See warranty page for more information.
Safety Disclaimer:
When using this electrical equipment, basic safety precautions
should always be followed. Read and follow the important safety
instructions in the safety section before and during use.

Table of Contents
2
Disclaimers ....................................1
Safety .........................................4
For Qualied Service Professionals Only!
T8-S Topside Installation .........................7
About The T8-S Topside ..........................8
Using The T8-S Topside ..........................9
For Qualied Service Professionals Only!
T8-S Topside Initial Conguration .................10

Table of Contents
3
User Congurable Settings ......................14
T8-S User Settings Menu ......................14
Entering/Using the User Settings Menu ...........14
T8-S User Settings Menu Tree ..................15
Heat Mode .................................17
Time Settings ...............................17
Filtration Settings ............................18
Interface Settings ............................19
Lock Operation ..............................19
Operation Instructions ..........................20
Temperature Operation ........................20
Toggling Display Orientation ....................22
Operating Pump-1 ............................23
Operating Pump-2 (If Applicable) ................24
Operating Aux (Pump-3/Air Blower - If Applicable) ...25
Operating the Spa Light .......................25
Standard Display & Error Messages . . . . . . . . . . . . . . . 26
Warranty ......................................28

Safety
4
Important Safety Instructions:
When using this electrical equipment, basic safety precautions
should always be followed, including the following.
Read and follow all instructions!
1. Warning: Children should not use spas or hot tubs without adult
supervision
AVERTISSEMENT: NE PAS LAISSER LES ENFANTS UTILISER
UNE CUVE DE RELAXATION SANS SURVEILLANCE
2. Warning: Do not use the spa 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 ASPIRÉS, NE PAS
UTILISER UNE CUVE DE RELAXATION SI LES GRILLES DE
PRISE D’ASPIRATION NE SONT PAS TOUTES EN PLACE.
3. Warning: People using medication 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 PROBLÈMES DE SANTÉ
DEVRAIENT CONSULTER UN MÉDECIN AVANT D’UTILISER UNE
DE RELAXATION
4. Warning: People with inpectious diseases should not use a spa or
hot tub
AVERTISSEMENT: LES PERSONNES ATTEINTES DE MALADIES
INFECTIEUSES NE DEVRAIENT PAS UTILISER UNE CUVE DE
RELACATION

Safety
5
5. 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
6. 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 PRENDRE NI ALCOOL AVANT
D’UTILISER UNE CUVE DE RELAXATION NI QUAND ON S’Y
TROUVE
7. Warning: Pregnant or possibly pregnant women should consult a
physician 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
8. Warning: Water temperature in excess of 100°F (38°C) may be
injurious to your health.
AVERTISSEMENT: IL PEUT ÊTRE DANGEREUX POUR LA SANTÉ
DE SE PLONGER DANS DE L’EAU À PLUS DE 38° C (100° F)
9. Warning: Before entering a spa or hot tub measure the water
temperature with an accurate thermometer
AVERTISSEMENT: AVANT D’UTILISER UNE CUVE DE
RELAXATION MESURER LA TEMPÉRATURE DE L’EAU À L’AIDE
D’UN THERMOMÈTRE PRÉCIS
10. Warning: Do not use a spa or hot tub immediately following strenuous
exercise

Safety
6
AVERTISSEMENT: NE PAS UTILISER UNE CUVE DE RELAXATION
IMMÉDIATEMENT APRÈS UN EXERCICE FATIGANT
11. Warning: Prolonged immersion in a spa or hot tub may be injurious
to your health
AVERTISSEMENT: L’UTILISATION PROLONGÉE D’UNE CUVE DE
RELAXATION PEUT ÊTRE DANGEREUSE POUR LA SANTÉ
12. Warning: Do not permit electric appliances (such as a light, telephone,
radio, or television) within 5 feet (1.5 m) of this spa or hot tub
AVERTISSEMENT: NE PAS PLACER D’APPAREIL ÉLECTRIQUE
(LUMINAIRE, TÉLÉPHONE, RADIO, TÉLÉVISEUR, ETC) À MOINS
DE 1.5M (5 FEET) DE CETTE CUVE DE RELAXATION
13. Caution: Maintain water chemistry in accordance with manufacturer’s
instruction
ATTENTION: LA TENEUR DE L’EAU EN MATIÈRES DISSOUTES
DOIT ÊTRE CONFORME AUX DIRECTIVES DU FABRICANT
14. 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 drowsiness,
lethargy, and an increase in the internal temperature of the body.
Effects: 1- Unawareness of impending hazard.
2- Fetal damage in pregnant women.
3- Failure to recognize the need to exit spa.
4- Physical inability to exit spa.
5- Unconsciousness and danger of drowning.
6- Failure to perceive heat.
15. Warning: The use of alcohol or drugs can greatly increase the risk of
fatal hyperthermia in hot tubs and spas
AVERTISSEMENT: LA CONSOMMATION D’ALCOOL OU DE
DROGUE AUGMENTE CONSIDÉRABLEMENT LES RISQUES
D’HYPERTHERMIE MORTELLE DANS UNE CUVE DE RELAXATION

T8-S Topside Installation
7
Topside Control Installation
The T8-S topside should be installed on an outward facing edge of the spa
so it’s not subject to trapped steam/moisture under the cover, as shown:
Failure to do so will result in the need to prematurely replace the graphic
decal assembly on the face of the topside control.
The T8-S topside control requires just a single 1.75” hole to be cut out of
the shell of the hot tub for installation, as shown:
Once ready to install, plug one end of the topside cable into the back of
the T8-S, snake the cable through the cutout in the shell and down to the
control box, and plug the opposite end of the topside cable into the control
box. Afx the topside by peeling off the paper over the adhesive tape on
the back of the topside, than pressing it rmly into place, slowly pressing
rmly all around the perimeter to assure a good bond to the shell.
Approx. 3-3/8” (83.5 mm)
Approx. 6-3/8” (~161 mm)
2-1/4” Hole 2-1/4” Hole 2-1/4” Hole
1-5/8” 1-5/8”

About The T8-S Topside
8
The T8-S Topside
You will be using the T8-S topside to operate your United Spa Controls C5
Series control box. The T8-S is pictured below, with the descriptions of the
items that will be referenced throughout this user’s guide.
10 - LED Display
20 - Jets-1 Button & Indicator Light
30 - Aux Button & Indicator Light
40 - Jets-2 Button & Indicator Light
50 - Temp Down Button
60 - Heat Indicator Light
70 - Light Button
80 - Temp Up Button
1
6
5
2
4
8
7
3

Using The T8-S Topside
9
Using The T8-S Topside
T8-S topsides use United Spa Controls’ patented technology.
This hybrid switching technology marries the satisfaction of having a
physical button to press, with the longevity and reliability of touch-panel
switching system with no moving parts to break down over time.
If your button presses are not registering, make sure that you are pushing
the raised buttons completely at against the panel, and that you are
waiting a second between button presses.
Upon Power-Up
Whenever the T8-S topside is powered on, the unit will ash ‘T8’ followed
by the units rmware version number (Example: ‘T808’) three times while
it starts up. All congurable settings are saved to permanent memory, the
only thing that needs to be set upon power-up of a T8-S topside that has
already been congured previously is the current time (it will default to 12
AM upon power-up).
Checking Software Version After Power-up
The software version can be accessed after initial power-up by simply
pressing and holding the ‘Aux’ button until display reads ‘PL-1’, followed
by pressing the Light button. The display will then, as it did at start up, ash
‘T8’ followed but the rmware version number three times. For example, a
T8-S with rmware version 8 would ash ‘T808’ three times.
NOTE: Do NOT connect/disconnect the T8-S topside while the control box
is powered. Always make sure the power is shut off at the breaker before
removing/installing a topside, as to avoid damaging the electronics.

T8-S Initial Conguration
10
T8-S Topside Conguration
Once the control box and topside have been properly installed, you can
power up the unit and program the topside for the control’s desired
equipment and operational conguration.
The conguration instructions that follow are meant to be carried out by a
spa service professional!
T8-S Topside Conguration Menu & Codes
The topside has a conguration menu consisting of ve codes that
congure what components the system will operate, and what maximum
amperage the system will operate at.
Each code has a number of options that the code can be set to. By default,
all codes are set to their rst option (Option 1).
Use the code chart on the next page to gure out which options you’ll need
to set for each code for the hot tub the control is being installed into.
Once you know what options all the codes should be set to, turn to the
pages that follow for instructions on entering the conguration programming
mode, and how to select the different options for each code.

T8-S Initial Conguration
11
T8-S Conguration Code Chart
Code 1: Jet-1 Button Conguration
Option 1: Jet-1 button operates Hi-Speed Pump-1
Option 2: Jet-1 button operates Lo-Speed and Hi-Speed Pump-1 *
Code 2: Jet-2 Button Conguration
Option 1: Jet-2 button operates Lo-Speed Pump-1
Option 2: Jet-2 button operates Hi-Speed Pump-2
Option 3: Jet-2 button operates Lo-Speed and Hi-Speed Pump-2
Code 3: Aux Button Conguration
Option 1: Aux button used only for settings/programming
Option 2: Aux button operates Air Blower
Option 3: Aux button operates Hi-Speed Pump-3
Code 4: Power (Amperage) Conguration
Option 1: 50A Operation (No heat with Aux)
Option 2: 60A Operation (No power restriction)
Option 3: 50A Operation (No heat with P-2)
Option 4: 40A Operation (No heat with P-2, and Aux)
Option 5: 20A 120V Operation or 30A 240V Operation
(No heat with anything other then P-1 Lo-Speed)
Code 5: Heater Operation
Option 1: Electric Heater operates with Lo-Speed Pump-1
Filtration cycle operates Lo-Speed Pump-1 & Ozone
Option 2: Electric Heater operates with 24hr Circulation Pump
Filtration cycle operates Ozone
Option 3: Electric Heater operates with timed/auto Circ Pump **
Filtration cycle operates Circulation Pump & Ozone
Option 4: Electric Heater operates with 24hr Circulation Pump
Filtration cycle operates Lo-Speed Pump-1 & Ozone
* - Code 1 should only be set to Option 2 if there is a second jet pump in the spa. If there
is only one jet pump, the default should be left so the unit operates as described later in
this manual, where the Jet-1 button operates Hi-Speed, and the Jet-2 button operates
Lo-Speed (avoiding ‘unused’ buttons).

T8-S Initial Conguration
12
Entering The T8-S Topside’s Conguration Menu
Once you’ve gone over the code chart and have chosen the options
you want to set for each code, follow these instructions for entering the
programming mode and setting the options. There is a time-out delay, so
taking longer then 10 seconds between steps will cause the topside to
time-out and resume normal operation.
Step 1
Press & Hold for ~15 seconds, until
the display will reads:
Step 2
Press & Hold for ~15 seconds, until
the display will reads:
Step 3
Then press to see the rst code:
While in the Conguration Mode
Press to change the selected Option of the displayed Code
Press to cycle to the next Code
Or press at any time to save any changes and
exit the Conguration Menu
Code 1 - Option 1

T8-S Initial Conguration
13
Changing The T8-S Topside’s Conguration Codes
Once you have entered the programming
mode, you will have Code 1 and its selected
Option showing on the display. This is shown
on the display as ‘C-O’, where C is the current
Code, and O is the currently selected/enabled
Option for that code. While in programming
mode the same 10 second time-out applies, if
you take longer then 10 seconds to change a
code’s selected option or cycle through to the next code, all settings will be
saved and the topside will time-out and resume normal operation.
Conicting Codes
You may notice, when programming the topside that certain codes may
not be visible/selectable. This means you have another code set to an
option that conicts with the missing option. So if you program the topside
to use the Jets-2 button to operate a two-speed Pump-2, you will no longer
see the code option allowing an air blower or third pump to be used on the
Jets-3 button (since those functions all use the same relay).
Saving Conguration Menu Changes
When the settings in the conguration menu have been properly set for
the spa’s conguration, press the ‘Aux’ button (or let the menu time-out
after approximately 15 seconds) to save changes and exit back to the
normal operation display.
Upon Conguration Completion
Once the topside has been initially congured, it will not lose those settings,
regardless of whether power to the unit is shut off or not.
Code 2 - Option 1
Currently Displayed Code
Currently Selected Option

User Congerable Settings
14
T8-S User Settings Menu
The user settings menu is home to all of the user congurable settings of
the topside. See the following page for a full menu tree.
Later in this section the individual settings will be explained in further
detail. What follows are the instructions on getting into, maneuvering
between, and making changes to these settings, which will be referenced
throughout this section.
Entering the User Settings Menu
Step1
Press & Hold for ~15 seconds, until
the display will reads:
Step 2
Press to see the rst setting (‘HEAT’).
Using the User Settings Menu
Press to cycle through the different settings
Press to view/cycle through the displayed setting’s options
Press
at any time to save your settings and exit - or - let the
topside time-out and save the settings and return to the
temperature display on its own (in about 15 seconds).

User Congerable Settings
15
(Cycle Duration: 0-12 hours)
User Settings Menu
Heating
Heater Mode (Press to view/change)
or
(Continued on next page...)
Press & Hold
Time
System Time (Press to view/change)
thru
thru
thru
Filter Cycle 1 - Start Time (Press to view/change)
Filtration
thru
(Start Time: 12am-11pm)
(Press to change)
(Cycle Duration: 0-12 hours)
thru
Filter Cycle 2 - Start Time (Press to view/change)
thru
(Start Time: 12am-11pm)
(Press to change)
(Minutes after the hour)
(Press to change)

User Congerable Settings
16
(...Continued from previous page)
User Interface
Temperature Scale (Press to view/change)
or
Fahrenheit Celsius
Time Display (Press to view/change)
or
Beep on Keypress (Press to view/change)
or
Temp Lock (Press to view/change)
or
Lock Set Temperature
Filtration
or
Filtration Purge (Press to view/change)

User Congerable Settings
17
User Settings (‘PL1’) Explained
Heater Mode (‘HEAT’)
The topside is set by default to operate in ‘Standard’ heating mode. This
means that when the temperature of the water in the spa drops below the
set temperature, the control automatically start heating, bringing Lo-Speed
of Pump-1 (or the Circulation Pump if it is set for timed/auto operation) on
as necessary.
The topside can also be set to operate in ‘Economy’ heating mode,
where the heater will only maintain the set temperature when the pump
is manually activated (if there is no 24hr Circulation Pump), and during
ltration cycles. In ‘Economy’ mode, if the current temperature falls below
the set heat temperature, the ‘Heat’ indicator light will ash to let you know
that the unit would be heating if not in Economy Mode.
Note: On spas with Circulation Pumps that run 24 hours a day, economy
mode will not effect heating behavior, the control will continue to heat as
needed to maintain the set temperature, and the ltration cycle will simply
control the ozonator (if applicable).
System Time (‘CLOC’)
The second setting in the user’s conguration menu is for setting the
system time. Pressing ‘Temp Up’ will display the rst setting, the Hour
Setting. The system time is reset to the default of 12 PM whenever the
units’ power is reset. Pressing ‘Temp Up’ will cycle from 12 AM (‘12:AM’)
to 11 PM (‘12:PM’). Pressing ‘Temp Down’ takes you to the second setting,
the Minutes Setting.Pressing ‘Temp Up’ will cycle from ‘--:00’ thru ‘--:59’.

User Congerable Settings
18
Filter Cycle 1 (‘FC-1’)
The Filter Cycle 1 setting allows you set the duration and start time for hye
cycle. Pressing ‘Temp Up’ will show the currently set cycle duration, which
can be set from 0 hours (no cycle) to 12 hours by pressing ‘Temp Up’ as
many times as needed to reach the desired setting. Pressing ‘Temp Down’
will then show the cycle’s start time, which can be set from 12 AM to 11 PM
by pressing ‘Temp Up’ as needed to reach the desired setting. The factory
default start time for the rst daily ltration cycle is 6 AM.
Filter Cycle 2 (‘FC-2’)
The Filter Cycle 2 setting allows you set the duration and start time for hye
cycle. Pressing ‘Temp Up’ will show the currently set cycle duration, which
can be set from 0 hours (no cycle) to 12 hours by pressing ‘Temp Up’ as
many times as needed to reach the desired setting. Pressing ‘Temp Down’
will then show the cycle’s start time, which can be set from 12 AM to 11 PM
by pressing ‘Temp Up’ as needed to reach the desired setting. The factory
default start time for the rst daily ltration cycle is 6 PM.
Filtration Purge (‘PURG’)
When the Purge Setting is turned ‘On’, the control will automatically purge
the plumbing of whatever components the system is programmed to
operate (on low speed where applicable) for 30 seconds each, starting a
minute after the beginning of each cycle. This serves to push any water
currently in those components’ plumbing back into the main body of water
for circulation and ltration.

User Congerable Settings
19
Temperature Scale (‘°F’)
The T8-S topside can display the temperature in either Fahrenheit (‘°F’) or Celsius
(‘°C’). The factory default setting is Fahrenheit, and can be changed by pressing
‘Temp-Up’.
Time Display (‘TDSP’)
By factory default, Time Display is set to ‘ON’. This means that during normal
operation the display will ash between the current time, and the current
temperature. Turning this setting ‘OFF’ will make it so that the display just shows
the current temperature during normal operation.
Beep on Keypress (‘BEEP’)
By default the T8-S topside will sound an internal buzzer when a button press is
registered. Simply toggle this code to ‘OFF’ to disable the buzzer.
Temp Lock (‘LOCK’)
The T8-S topside can be set to lock the set temperature (‘TEMP’). The default is
that the lock is ‘OFF’.
When the topside is set to lock the set temperature, pressing either ‘Temp Up’ or
‘Temp Down’ during normal operation will display the currently set temperature as
usual. Pressing either ‘Temp Up’ or ‘Temp Down’ button again, will display ‘LOCK’
on the screen briey, instead of allowing the set temperature to be changed.