6 | © Danfoss | 2019.02
VI.GM.A2.02
CCR3+ Controller
LANGUAGE
ENGLISH
1. Product description
The CCR3+ Controller is a controller used to
control return temperature in one pipe heating
systems with functions such as temperature
registration and monitoring riser temperature.
The controller is connected to thermo actuators
type TWA-Z (NO) and remote temperature
sensors PT1000, type ESMC installed on each
riser.
2. Application
Temperature sensor (S0, S1-S20 / S21-36)
Pt1000, S0 – type ESMC/ESM11, S1-S20 / S21-36 – type ESMC
Temperature range (registration)
–20 °C … +120 °C
Measuring accuracy
+/- 0.5 K
Inputs: B1, B2 & B3
Free contact (5 V 1 mA)
Number of control valves (risers)
20 basic, additional 16 with system extension via CCR+ Slave Unit
Output signal to actuators
24 VDC max. 1 A
Alarm signal output
24 VDC max. 1 A
Relay output
0-24 VDC max. 1A
Type of memory
Build-In
Capacity of memory
8 GB
Timer: Real time clock
Built-in battery – powered for 10 years
Communication interfaces
- Wi-Fi (communication port only)
- TPC/IP port (LAN cable connection)
- Modbus RS485 RTU
- IP Modbus (LAN cable connection)
Default IP settings:
- Default LAN IP address (static): 192.168.1.100
- Default WiFi acess IP address (static): 192.168.1.10
- IP address mask: 255.255.255.0
- Gateway address: 192.168.1.1
- DNS address: 192.168.1.1
- CCR name: ccrplus
- Default password: admin1234
Ambient temperature
0 … +50 °C ( for CCR3+ only. The ambient temperature for actuators TWA-Z (NO)
should not be above 30 °C)
Transport temperature
–10 … +60 °C
IP rating
IP 20
Power supply
24 VDC
Power consumption (Controller only)
1)
10 VA
Power consumption (Slave Unit only)
1)
3 VA
Weight
0.3 kg
Installation
DIN rail 35 mm
1)
To select proper power transformer please follow formula: 24 V 10 VA (controller) + 7 VA*/per each actuator
CCR3+ controller is part of AB-QTE solution
for one-pipe heating systems. It converts
one-pipe heating system (usually constant flow
system) into efficient variable flow system. This
innovative solution dynamically controls the
flow in the riser according to the load in risers by
return temperature control. There are few basic
rules to be followed, even more valid in case of
renovation:
• Set AB-QM according to the required heat
load of the riser/loop.
• Ensure correct radiator bypass flow setting
(typically around 25-35 %). If the resistance of
the radiator is much too high compared to the
bypass this may result in underflow through
radiator if the flow in riser/loop is reduced.
• Optimize flow temperature that is driven by
substation control (too high flow temperature
can influence efficiency of first radiators in the
riser/loop and result in oscillation of flow).
• Optimize return temperature that is driven
by CCR3+ (too high return temperature can
result in lower energy efficiency).
• Install temperature sensor in front of AB-QM
as close to last radiator in the riser/loop as
possible.
Following above rules will ensure optimal
control performance of CCR3+ as well as energy
efficiency and reliability of heating systems.
For further application insights please contact
Danfoss representative.
3. Technical data