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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 Comfor t and Economy setpoints, see Temperature Setpoint.

This schedule is defined with the following Economy and Comfor t 

periods:

• Comfor t:

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:

To reset 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 

Comfor t and Economy setpoints.

• You can program up to 4 dif ferent 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:

o

12h

o

24h

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°F

5:00a

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°F

4:00p

4:00p

4:00p

4:00p

4:00p

8:00p

8:00p

68°F

9:00p

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 countr y house from your of fice on

Friday, or your house from the airpor t, or from your car on your way back

from vacation.

CHARACTERISTICS

This FloorStat works dif ferently than 

a conventional electromechanical type.

The latter can have a dif ferential of 

temperature up 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 discomfor t often found with

conventional electromechanical thermo-

stats. The propor tional 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 star ts.

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:

Propor tional 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 transpor tation 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 var y 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

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