Watts FloorStat 500650-120CS User manual

120-VAC Models: 500650-120CS, -120B, -120BH, and -120BW
240-VAC Models: 500650-240CS and -240B
The Watts Radiant 500650 programmable FloorStat will provide both
energy savings and comfort.
NOTE: The 500650 face plate must be mounted on a PB112 Series
Power Base.
The FloorStat is designed to control the floor temperature. To avoid dam-
age to your floor, we recommend you follow the supplier’s instructions.
The FloorStat is equipped with an On/Standby switch making it possible
to put the FloorStat in “sleep” mode when its use is no longer required
(i.e., summer). This will not affect the clock or programming.
1. SWITCH SELECTION
This FloorStat is factory-set to the following default values ( ):
Switch Function UP DN
SW1 Temperature format* °F °C
SW2 Early start†Disable Enable
SW3 Time format 12 h 24 h
*If you switch from °F to °C or vice versa, the , , and setpoints may need
tobe redefined (only if setpoints were modified from their factory-set default).
†When using AUTO mode, the FloorStat calculates the optimum start time to
obtain the desired temperature by the set time. The heating system could be
started as early as 6 hours prior to set time when required. The FloorStat will
automatically re-evaluate (every day) the optimum start time based on the
previous day’sperformance.
Switches are located on the rear of the face plate. To modify, switch
UP or DN.
2. MOUNTING FACE PLATE
To mount the face plate onto the power base, refer to the diagrams
below:
To remove the face plate from the power base, invert steps.
NOTE: The screw cannot be removed completely.
Owner’s Guide
On/Stand-by switch
GFCI warning light
and test button
Day and Clock settings
Programming Mode PGM
Mode Selection/
Exit Prog.
Floor Temperature
Current Mode and
Setpoint
Current Program No.
Pre-defined Setpoints
Display Backlighting
Button
Increase/Decrease
Temperature
3. FIRST POWER-ON
When power is applied for the first time, the LCD displays: 0:00,
MO (Monday), , and floor temperature.
1. Press Hour –Min to set the current time.
2. Press Day to set current day.
One of the two following messages may be displayed if the installation
is incorrect:
• LO: The floor temperature is below 32°F (0°C), or the temperature
sensor is defective, or not connected. The heating indicator is
displayed and the relay is closed (energized).
• HI: The floor temperature is above 140°F (60°C), or the temperature
sensor is defective.
4. GFCI TEST
The GFCI monitors electricity flow for any
loss of current; if there is, the thermostat
will cut-off power to the heating system. We
recommend you test the GFCI immediately
after installing the control module, and once
amonth thereafter to ensure it is operating
properly. To test:
1. Increase the temperature until the
heating indicator is displayed.
2. Press TEST:
• Successful: Test warning light is ON
and power to heating system is cut-off.
• Unsuccessful: the Test warning light is
OFF. Cut power to heating system from
the main power panel and call customer
service.
3. When successful, reset FloorStat (On/Standby) to power the
heating system.
NOTE: If the warning light comes on during normal operation, cut power
to heating system from the main power panel and have an electrician
verify the installation.
5. TEMPERATURE SETPOINT
The 500650 thermostat is programmed with the following default
temperature control setpoints:
Symbol Setting Default New
Comfort (when you are at home) 82°F (28°C) ___°__
Economy (when asleep or away from home) 68°F (20°C) ___°__
Vacation (away for prolonged absence) 50°F (10°C) ___°__
If you wish to modify a setpoint, follow these steps:
1. Set the desired temperature using the
buttons.
2. Press and Hold the or or button.
3. Release button when symbol is displayed.
4. Press Mode/Ret to exit.
6. OPERATING MODES
This thermostat has three operating modes:
Automatic —Executes the Comfort/Economy
programs as defined in the schedule.
1. Toactivate, press Mode/Ret until is displayed. A program
icon (e.g., ) and corresponding setpoint (e.g., or ) are also
displayed.
Temporary Bypass —Maintains a specific temperature until the
beginning of the next program. Set the desired temperature using the
OR press or to use a pre-defined setpoint.
Manual —Maintains a manually-defined setpoint.
1. To activate, press Mode/Ret until is displayed.
2. Set temperatureusing OR press or to use Comfort or
Economy setpoint.
Vacation —Maintains the Vacation setpoint when away for a
prolonged absence (e.g., a vacation). Can also be done remotely
through your telephone.
1. Press to activate.
Correct Incorrect
Comfort
Economy
Vacation
Higher
Lower
Watts Radiant, Inc. Programmable FloorStat 04/28/2006 920-115-010-00-1-A

7. DEFAULT SCHEDULE
AUTO MODE ONLY
The 500650 FloorStat is preprogrammed with the following schedule:
Prog Setpoint* MO TU WE TH FR SA SU
82°F 6:00a 6:00a 6:00a 6:00a 6:00a 6:00a 6:00a
68°F 8:00a 8:00a 8:00a 8:00a 8:00a 10:00a 10:00a
82°F 5:00p 5:00p 5:00p 5:00p 5:00p 5:00p 5:00p
68°F 10:00p 10:00p 10:00p 10:00p 10:00p 11:00p 11:00p
*To modify the Comfort and Economy setpoints, see Temperature Setpoint.
This schedule is defined with the following Economy and Comfort
periods:
•Comfort: 6:00a to 8:00a and 5:00p to 10:00p.
•Economy: 8:00a to 5:00p and 10:00p to 6:00a.
The SunTouch 500650 controls the heating system according to the
setpoints defined in the four programs.
NOTE: Toreset the 500650, press and hold , position switch to
Standby then to On. This will completely erase the schedule and any
modified setpoints.
8. MODIFY THE SCHEDULE
•After 60 seconds of inactivity, the FloorStat will automatically exit
programming mode.
• It is faster to program the same schedule for the entire week; then
modify the exception days.
• See Temperature Setpoint for more information on how to modify the
Comfort and Economy setpoints.
• You can program up to 4 different settings for each day of the week.
Prior to making changes, use this blank template to record your
personalized schedule:
Prog Setpoint MO TU WE TH FR SA SU
___°_
___°_
___°_
___°_
Temperature format: o°F o°C
Time format: o12h o24h
Notes: __________________________________________________________
________________________________________________________________
________________________________________________________________
To modify, follow these steps:
1. Press PGM to access the programming mode
2. Press Day to select the day to be programmed (hold for 3 seconds
to select all days of the week).
3. Press PGM to select the Program No. (1, 2, 3, or 4).
4. Press Hour and Min to set the time OR press Clear to clear the
time (--:-- is disregarded).
5. Repeat steps 2 to 4 for remaining programs.
6. When completed, press Mode/Ret to exit programming mode.
Schedule Example:
This schedule is an example of the various possibilities:
Prog Setpoint MO TU WE TH FR SA SU
82°F5:00a 5:00a 5:00a 5:00a 5:00a 9:00a 9:00a
68°F 8:00a 8:00a 8:00a 8:00a 8:00a 12:00p 12:00p
82°F4:00p 4:00p 4:00p 4:00p 4:00p 8:00p 8:00p
68°F9:00p 9:00p 9:00p 9:00p 9:00p 11:00p 11:00p
REMOTE INPUT
The FloorStat is equipped with a remote input which allows connection
of a telephone controller or any other remote control system. When a
signal is received through this input, the FloorStat will automatically
switch from normal operating mode to Vacation mode ( ), or vice
versa. You can, for example, heat your countryhouse from your office on
Friday,or your house from the airport, or from your car on your way back
from vacation.
CHARACTERISTICS
This FloorStat works differently than
aconventional electromechanical type.
The latter can have a differential of
temperatureup to 7.2°F (4°C) while this
electronic FloorStat has one of only
0.9°F(0.5°C). This slight oscillation
eliminates the discomfort often found with
conventional electromechanical thermo-
stats. The proportional controller deter-
mines the amount of power required by
the floor heating system to maintain the
desired temperature setting.
100%
80%
60%
40%
20%
To see this process, the display shows, in real time, the percentage of
power applied to the electric heating system.
Percentage (100% = 1 cycle)
CYCLES 20% 40% 60% 80% 100%
15 min. 3 min. 6 min. 9 min. 12 min. 15 min.
Example for FloorStat with 15-minute cycles:
For example, when the screen displays (which equals 40% or 6 min-
utes), then the heating system will be ON for 6 minutes, then OFF for
the remaining 9 minutes of the 15-minute cycle. The heating indicators
refresh when a new cycle starts.
TECHNICAL SPECIFICATIONS
Models (120 VAC): 500650-120CS, -120B, -120BH, and -120BW
Models (240 VAC): 500650-240CS and -240B
Display range: 32°F to 140°F (0°C to 60°C)
Setting range (ambient): 40°F to 86°F (5°C to 30°C)
Setting range (floor temp.): 40°F to 104°F (5°C to 40°C)
Comfort default: 82°F (28°C)
Economy default: 68°F (20°C)
Vacation default: 50°F (10°C)
Floor default temperature limit: 82°F (28°C)
Temperature variation: ±0.9°F (0.5°C)
Storage: –4°F to 120°F (–20°C to 50°C)
Temperature control: Proportional integral adaptive (analyzes the
system’s past cycles to optimize future commands), 15-minute
heating cycles.
MEMORY BACKUP
In the event of a power failure, an internal circuit will maintain the pro-
gramming. Only the time will have to be set if the power failure is more
than two (2) hours. The FloorStat will return to the same operating mode
as set before the power failure.
WARRANTY
WATTS RADIANT, INC. ONE (1) YEAR LIMITED WARRANTY
This product is warranted against material defects and workmanship
in normal use for a period of one year, from the date of the original
purchase from authorized dealers. During this period, Watts Radiant, Inc.
will repair or replace the product with a new or of equivalent quality at
Watts Radiant option, without charge, any product proven defective in
normal use.
Warranty does not cover transportation costs. Nor does it cover a
product subjected to misuse or accidental damage. This warranty does
not cover the cost of installation, removal or reinstallation.
This limited warranty is in lieu of all other warranties, obligations or
liabilities expressed or implied by the company. In no event shall Watts
Radiant, Inc. be liable for consequential or incidental damages resulting
from installation of this product. Some states or provinces do not allow
limitations on how long an implied warranty lasts, or the exclusion or
limitation of incidental or consequential damages, so the above exclu-
sions or limitations may not apply to you. This warranty gives you
specific legal rights and you may also have other rights which vary from
state to state.
The defective product and the original sale receipt must be returned to
the original dealer or shipped pre-paid, insured and addressed to:
Watts Radiant, Inc.
4500 E. Progress Place
Springfield, MO 65803-8816
If you have any questions concerning the installation or programming of
this product, please call our technical assistance at 800-276-2419.
Watts Radiant, Inc. Programmable FloorStat 04/28/2006 920-115-010-00-1-A