Cetetherm Mini Plus CM737
Installation, service and operating instruction
47
18
Options
The mounting instructions are described for a new installation. If the kits are supposed to be installed on an
already installed subsystem, you must release the water pressure and disconnect the electrical power supply
before starting.
18.1 Safety thermostat
Heating systems sensitive to high temperatures for example under-floor heating must be equipped with a safety
thermostat. If the heating system is not equipped with the thermostat, the under-floor heating system and floors
in general might get damaged.
1. First disconnect the substation electrical power supply cable. Disconnect the electrical
plug on the circulation pump.
2. Attach the electrical box for under floor heating on the mounting plate.
3. Connect the new power supply cable from the electrical box to the circulation pump.
4. Reconnect the existing power supply cable to the connection on the electrical box.
5. Attach the thermostat to the pipe for heating supply.
6. Set the correct maximum temperature value for the thermostat.
7. Attach all electrical wires with the necessary number of straps. It is important not to
attach electrical wires on primary heating pipes and sharp edges.
Picture 34
18.1.1 Parameters and recommended settings for under floor heating
Set recommended settings for under floor heating systems. Instructions regarding installation parameters see
chapter
9 Activation of installer parameters
Parameter
Parameter
N:o
Factory Default Setting
Optional Setting
Display
Description
Display Description
Category 1 Parameters - Programmable Thermostat Settings
OTC heat curve
15:OC
5
1 to 40
1 to 40 adjustment in
steps of 1
Category 2 Parameters - System Settings (press PROGRAM to access this category)
Economy function
3:Pd
0
Diff between
outside and
calculated water
supply
temperature
0 to 20
If the calculated water
supply temperature is not
greater than the outside
temperature by this
amount the heating will
switch off.
Category 3 parameters
– Boiler settings (press PROGRAM to access this category)
Maximum central heating
set point
1:CH
45
90°C or obtained
from the boiler
40 to
90
40°C to 90°C adjustment
in 1°C steps
