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Quality Heating PRF-78 thermostat
User Guide
Welcome
Your new thermostat will provide years of reliable
service. Using this digital thermostat will provide
more uniform comfort in your home through the
seasons. Thank you for buying the product!
Please read this manual for complete instructions
on installing and operating your thermostat. If you
require further assistance, please feel free to
contact us.
Thermostat
Screws
User Guide
Wall plate
1pc
2pc
1pc
1pc
We offer the warranty of 18 months from the sales day
If it is not the problem of quality or beyond the warranty
time, we will charge for the after-sale service.
In the box you will find
Service
About your thermostat
Features of your thermostat
Modern design similar as a cell phone.
Beautiful Frame CHROME creates elegant life.
Acrylic lenses to avoid the finger scrath.
Touch Button makes simple operation.
Large screen display with backlight is easy to
read—even in the dark.
5+2 or 6+1 six periods program schedules
maximize comfort and economy..
One-touch temp control overrides program
schedule at any time.
Precise comfort control keeps temperature within
1°C of the level you set.
Internal and external sensor selectable is
suitable for any place.
Data memory when power is off.
Easy installation.
Model definition of your thermostat
Home screen quick reference
Operation
1. Setting Power on/off
Press to turn on/off the power.
2. Setting Temperature
Press to set the temperature.
3. Setting the Clock
Press to set minute, hour and week.
Press for adjusting.
Press again to leave time setting.
3. Adjusting program schedules
Press and hold to weekly programmable setting.
12345 will display on the screen.
Press to time setting of the first period.
Press to temperature setting of the first period.
PRF-78 is a thermostat, used as
controlling floor electric heating or water heating
system electric actuators open or close. The
thermostat is used in the commercial, industrial,
hospital, hotel, hotels, civil buildings and villas for
heating control.
Suitable for 86mm hidden box and european 60mm
round box.
RS485/MODBUS communication is optional.
Power Up DownClock
Mode
Time
Timing on/off
AM/PM
Room Temp.
Set Temp.
Manual
Lock
Period
Floor Temp.
Heating On
Programmable
Temp.Week
GA: Water heating, 3A
L: Backlight
P: Weekly programmable
For example: PRF-78 GAS2LP
GB: Electric floor Heating, 16A
N/A: Internal sensor only
S2: Both internal sensor and floor external sensor
N: RS485
Technical Data of your thermostat
Sensor：NTC
Accuracy：±1℃
Power Consumption：< 1.5W
Timing Error：<1％
Power Supply：95 ~ 240VAC, 50 ~60Hz
Current Load：3A（water heating)，
16A（electric heating)
Shell material：PC+ABS (flame retardant)
Dimension：86x86x13.3mm
Ambient Temp.：0-45℃，5-95％RH
（Non-condensing）
Storage Temp.：-5-55℃
Installation Hole distance: 60mm
Press M to change manual and weekly programmable.
P and N could not be compatible at the same time.
Set Temp. Range：5-35℃
Room Temp. Range：5-99℃
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Installing your thermostat
8. Setting functions and options
During power off, press and hold M and at the
same time for 5 sec. to system functions. Then press
M to change the different items. All the settings will
confirm automatically when power is on. Press
to confirm, to cancel.
Wiring your thermostat
WARNING: Please arrange the professional technician
to install this product according to installation drawing and
instruction.
RISK OF ELECTRICAL SHOCK. Disconnect power supply
before making electrical connection. Contact with components
carrying hazardous voltage can cause electrical shock and may
result in severe personal injury or death.instruction.
Press to time setting of the second period.
Press to temperature setting of the second period.
Press to time setting of the third period.
Press to temperature setting of the third period.
Press to time setting of the fourth period.
Press to temperature setting of the fourth period.
Press to time setting of the fifth period.
Press to temperature setting of the fifth period.
Press to time setting of the sixth period.
Press to temperature setting of the sixth period.
Press to Sat. & Sun setting.
The above is the 5+2 weekly programmable.
The 6+1 weekly programmable please refer to the
above setting. Please change 5+2 or 6+1 in the high
senior options 7.
Factory default setting of period time and temperature
Sat & Sun
AC95~230V
IP20
N
L
1
2
3
4
M
Close Open
5
6
NTC
GA
L1
N1
LOAD
IP20
N
L
RS485+
(Red)
RS485(White)
1
2
3
4
NTC
5
6
GB
Remark:
GA is for water heating;
GB is for electric heating;
NTC and RS485 is optional.
Wiring your thermostat
www.elektrische-vloerverwarming.nl
Remark: all values please press for the adjustment.
Remark: 1. When the sensor type is AL, room temp. and floor temp.
could be changed by pressing and holding for 3 second.
2. Press and hold for 5 sec. to lock/unlock the button.
3. Connect the LCD board into the wall plate.
4. Finished.
(Fig 4)
(Fig 3)
RS485+
(Red)
RS485(White)
Code Func on Se ng and op ons Default
1
Temperature
compensa
on
-9 to +9℃ (for internal sensor)
0
2
Deadzone
Temperature
1 ~ 5℃.
1
3 Sensor types
In：Internal Sensor（to control or limit the temperature）
Ex：External Sensor（to control or limit the temperature）
AL：Internal/ External Sensor（Internal sensor to control temperature,
external sensor to limit temperature）
Remark: Please make sure the right sensor. If choose the wrong or bad
one, LCD will display Err, the thermostat will stop working un
l the
failure is solved.
In
4
Low temperature
protec
on se ng.
5-10℃. When up to Max. 10℃, press . When display”
. W h en display“
- -”, cancel this
func
on. When the detec ng temp. is lower than the low temperature
protec
on se ng, hea ng equipment will be forced to open.
5
5
High temperature
protec
on se ng.
35-70℃. When down to Max. 35℃, press . When display“- -”, cancel
this func
on. When the detec ng temp. is higher than the high
temperature protec
on se ng, hea ng equipment will be forced to
close.
45
6 Bu on locking
0: All bu
ons are locked except power bu on.
1：All bu
ons are locked.
0
7（1）
Weekend se
ng
(op
onal)
0: Two-day Weekend：12345 and 67
1: One-day Weekend：123456 and 7. This func
on is just available for
programmable thermostat.
1
7（2）
Communica
on
Protocol (op
onal)
0: The equipment could not be controlled by computer (communica
on
protocol)
1: The equipment could be controlled by computer (communica
on
protocol). This func
on is just available for RS485/Modbus thermostat.
0
8 12/24 hours
12h: 12 hours
24h: 24 hours
24h
9 Backlight Time 3-99 seconds
10
10
Intelligent Recovery
00: Programmable on
me
01: Intelligent recovery. (system starts 30min. early when setpoint is
reached by start of program period).
00
11
Return to factory
se
ng
Press to adjust rst0 to rst9. Press again return to factory
se ng.
12
485 Communica
on
IP high address
(op
onal)
00--FF
00
13
485 Communica
on
IP low address
(op
onal)
01--FF
01
AC95~230V
This product is suitable for standard 86mm wall
box or european 60mm round box.
1. Connect the wire of power and other equipment into
the terminals.
(Fig 1)
(Fig 2)
2. Fix the wall plate into the wall box by a screwdriver.
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