Danfoss REPI Series User manual

© Danfoss | 2022.05 AI097986404620en-010102 | 1
REPI Series Digital Thermostat Manual
Data sheet
Description REPI series thermostats are used to control
room temperature in industrial, commercial and
residential environment via controlling electric
modulating valve with 0-10VDC (4-20mA) control
signal or floating control as well as damper
actuator of VAV system.
Electronic control technology is adopted, with
green backlit LCD display of: working mode
(cooling “ ”, heating “ ”, ventilating “ ”, auto
“ ” ); fan speed (low “ ”, med “ ”, high “ ”, auto
“”); room temperature; setting temperature
etc. push button: On/Off “ ”; mode changeover
“ ”; fan speed choose “ ” and temperature
adjustment “ ” and “ ”.
Shell: PC + ABS retardant material.
Function
Detect and Display room temperature
Room temperature setting
Fahrenheit or Celsius degree display
Timing sleep
Control On/Off of cooling and heating
equipment
Selectable single speed or three speed fan
control
Order Guide
Model Output signal Fan
(Single/3-speed)
RS485
Network
Input
Control
Remote
Sensor
Floating Modulation
REPI-2 Cooling/Heating   
REPI-2N Cooling/Heating    
REPI-4 Cooling/Heating   
REPI-4N Cooling/Heating    
Fan: thermostat with fan functions, can be selected with single speed fan or three speed fan by setting parameter.
Remote Control: input signal can be selected by setting parameter.
Specification
Set temperature range: 0 - 99.5 °C adjustable
Accuracy displayed: 0.1 °C
Accuracy: ±0.5 °C
Rated Power: < 1 W
Sensor type: NTC
Display: LCD
Power: AC 24V±10%, 50Hz/60Hz
Output signal: AC 24V×2 (0.5A resistive) ,
0 - 10VDC(5mA) / 4 - 20mA (600Ω)
Relay load: 2A (resistive load), 1A (inductive
load)
Input signal: dry contact (NO)
Dimensions: 86×86×23mm (W×H×D)
Fixing screw width : 60mm (Standard)

2 | AI097986404620en-010102 © Danfoss | 2022.05
Data sheet REPI Series Digital Thermostat Manual
Operations
On/Off: Press “ ” buttons to turn on;
press “ ” again to turn off.
Setpoint: With thermostat on, press “ ” to
reduce the setpoint, press “ ” to increase the
setpoint, the setpoint step is
0.5 °C, the setpoint will be confirmed
automatically after 5 seconds, and then return to
dispay status, press “ ” or “ ” to check setpoint.
Mode: With thermostat on, press “ ” to
change the working mode – Cooling “ ”,
Heating “ ”, Vent “ “, Auto “ ”
( Auto is available REPI-4/ REPI-4N).
Fan Speed: With thermostat on, press “ ” to
select the desired speed – low speed “ ”, Med
speed “ ”, High speed “ ”, auto “ ”. If single
speed fan available, there’s only med speed “ ”.
Under auto speed fan, the fan speed will be
changed automatically as below: in low speed
when room temperature
is 1 °C difference with setpoint;in med speed
when room temperature is 2 °C difference with
setpoint; in High speed when
room temperature is 3 °C difference with
setpoint.
Sleep: Thermostat will get into sleep function
after programming.The set Temperature should
to be.
To set: Press “ ” button for 3 seconds till
“ ” display, there’s a number of count down
in the center of LCD, Use “ ” or “ ” to adjust
the desired sleep time: the max. = 48 hours;
thermostat will return to the working status after
5 seconds, “ ” is flashing to start counting down.
The setpoint should be replaced by the sleep
setpoint.
To quit: When thermostat get into Sleep
function, “ ” will flash, press “ ” or “ ” to quit.
Keypad lock: press “ ” and “ ” for 10
seconds till to “ ” display to activate, under this
function, any keypad is locked.
Press “ ” and “ ” for 10 seconds till “ ”
disappear to quit the function.
Set Parameters: With thermostat off, press
“ ” for 10 seconds to enter menu to set the
parameters.
Parameter table
Parameter Description Default Range Step
1 Power on status (0: Off; 1: On; 2: Hold) 2 0 - 2
2Fan speed (0: Single Speed; 1: Three Speed) 1 0 - 1
3 Fan mode (DA; DB) 0
4 Sensor selection (0: Internal; 1: Remote) 1 0 - 1
5 Temperature format (0: Celsius; 1: Fahrenheit) 0 0 - 1 0.1
6Temperature calibration 0 -20.0 - +20.0 0.1
7Minimum setpoint 5 °C/41 °F 0 - 99.5 0.5
8Maximum setpoint 35 °C/96 0 - 99.5 0.5
9 Dead band (REPI-4) 2 0 - 10 0.5
10 Heating & Auto sleep setpoint 7 °C/45 °F 0 - 99.5 0.5
11 Cooling sleep setpoint 28 °C/82 0 - 99.5 0.5
12 Comms# (REPI-2N;REPI-4N) 1 1 - 32 1
13
Input Signal Mode 0: Invalid
1: Changeover(REPI-2)
2: thermostat will be sleep without input signal
3: thermostat will be Off without input signal
0 0 - 3
14 Heating reset time 90 sec. 10 - 300 sec. 10 sec.
15 Cooling reset time 90 sec. 10 - 300 sec. 10 sec.
16 Ports mode (0: Modulation & Floating; 1: On/Off) 0 0 - 1
17 Valve status as turn off (0: Close; 1:Hold; 2: Open ) 0 0 - 2
18 Port1 Modulation direction (0:10V Open; 1:10V Close) 0 0 - 1
19 Port1 Modulation minimum signal 0Bit 0-128Bit(5V/10mA) 0.04V/Bit(0.08mA/Bit)
20 Port1 Modulation proportional 2 1 - 20 0.5
21 Port2 Modulation direction (0:10V Open; 1:10V Close) 0 0 - 1
22 Port2 Modulation minimum Signal 0 Bit 0-128Bit(5V/10mA) 0.04V/Bit(0.08mA/Bit)
23 Port2 Modulation proportional 2 1 - 20 0.5
24 Port1 Floating minimum time 1 sec. 1 - 9 sec. 1 sec.
25 Port1 Floating maximum time 30 sec. 10 - 300 sec. 10 sec.
26 Port1 Floating minimum time 1 sec. 1-9 sec. 1 sec.
27 Port1 Floating maximum time 30 sec. 10 - 300 sec. 10 sec.
28 Disable / Enable bypass PID control
(0: Disable; 1: Enable) 00-1
29 Override output value when bypass PID control
Display output value when enable PID control 0 - 255

AI097986404620en-010102 | 3© Danfoss | 2022.05
Data sheet REPI Series Digital Thermostat Manual
30 Override output value when bypass PID control
Display output value when enable PID control 0 - 255
31
Input signal management: 0: Input valid
1: Override Input: open
2: Override Input: close
00-2
32 Display room temperature or set-point
0: Room temperature 1: Set-Point 00-1
33
Configuration external sensor
0: B = 3950; 1: B = 3450; 2: B = 3900
3: User define (via network. default B = 3950)
00-3
34-38 N/A
39 Start temperature of Low temperature protection 5 °C/42 °F 0-15 °C/42-62 °F 1 °C/2 °F
40 Stop temperature of Low temperature protection 7 °C/46 °F 2-17 °C/46-66 °F 1 °C/2 °F
It will confirm itself 20 seconds later after setting and return to Off state.
Parameter table (continuous)
Specification
There is a 5 poles switch on PCB. The meaning is below:
Location ON OFF
1 120 ohm Resistance between AB wires No Resistance between AB wires
2 Port 1 Modulation 0 - 20mA Off
3 Port 1 Modulation 0 - 10VDC Off
4 Port 2 Modulation 0 - 20mA Off
5 Port 3 Modulation 0 - 10VDC Off
40 Stop temperature of Low temperature protection 7 °C/46 °F
Mounting
1. Open the back panel with screwdriver. 2. Connect the wires follow the diagram.
3. Fix the base with screw. 4. Fix the front panel and finish the installation.

© Danfoss | DCS-SGDPT/SI | 2022.054 | AI097986404620en-010102
Data sheet REPI Series Digital Thermostat Manual
Wiring diagram
Note: Be sure to connect all the wires as per the wiring diagrams and keep it away from water, mud and other material so as to
prevent the unit being spoiled!