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HVAC CONTROL & POWER
 
 

Wall Mounted Temperature Controller - EFRP-91
EFRP is used as an external regulator for power controllers EFR and EFM to modulate the regulation of room temperature in air duct systems with electric heater batteries, or radiant panel heating.
24V proportional regulator
DC output 0-10V or 10-0V
Temperature range 0/+40°C
Adjustable P-band
Setback temperature via external timer
Wall mounting
Product Range
Type Product EAN-Nr
EFRP-91 Regulator for wall mounting with built-in sensor 5703502540856
 
Accessories for EFRP-91 *
 
ETF-144/99  Universal sensor for floor and ceiling 5703866101069
ETF-944/99-H Room sensor for wall mounting 5703502500379
ETF-1144/99 Duct sensor with adjustable flange 5703866100406
  *) Remove the jumper from its pins for connection of remote sensor.  
Function
EFRP has a temperature range of 0/+40°C. It submits a 0-10V DC control signal in proportion to the temperature deviation.
The proportional band is adjustable. The control signal is 10V when the sensor indicates a temperature which corresponds to the preset temperature -0.5 X P-band.
When the sensor temperature corresponds to the preset temperature +0.5 X P-band, the control signal is 0V.

The control signal can be changed to 10-0V by means of jumpers inside.
Application
In systems with water-based heating/cooling surfaces EFRP is used for regulating a desired room temperature via the valve actuator. EFRP can also be used in combination with step controller ETT-6 for regulating modulated controlled electrical heating surfaces, air condensers, compressors or gas boilers.
Technical data
Supply voltage 14-24V DC or 24V AC ±10%
Power consumption Max. 30 mA
Temperature range 0/+40°C
DC-output Max. 2 mA, 0-10V DC (10-0V DC)
Regulating mode Proportional
P-band adjustable 1-6°C
Setback temperature Adjustable 3-10°C
Ambient temperature -10/+50°C
Dimensions L x W x D 84 x 84 x 27 mm
Housing IP 30
Settings
Proportional band, Temperature setback, Room temperature, 0-10V - 10-0V (different connections).
Proportional band
Setting is made on the potentiometer behind the front panel.
Temperature setback
Setting is made on the potentiometer behind the front panel. Activation of setback temperature must be done via potential free contact in remote contact timer.
Mounting
EFRP-91 is with built-in sensor and is mounted on the wall in the room, where the temperature should be controlled. By removing the factory-mounted jumper the remote sensor can be connected.
Power supply
EFRP is power-supplied from a power controller type EFR or EFM or from a separate 24V AC power supply.
Control signal
The control signal is connected to the 0-10V DC terminals on the power controller type EFR or EFM or damper/valve motor.
EFRP-91 Controller