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Grant Recommend the use of a suitable glycol to protect against frost. They recommend a protection level of a
minimum of –9 Degrees.
Please find below a chart for Calculating the Amount of Glycol required for the volume of the system.
Correction
factor
* The temperature values are indicative. Always refer to the temperatures given for the specified product used.
If Ethylene Glycol is used in the system, the Anti-freeze function is not required and the Dip Switch (please see
next section DIP switches) setting need to be altered and some parameters also should be modified.
This is done Via the Service Level Setting.
Please find below details on altering the parameters.
First Access the installer level:
1. Press and hold the menu (sun) and the – and + buttons together for 3 seconds to enter
Installer Level.
2. "InSt" parameter number "00 00" and the parameter value "_ _ _" will be shown on the
display. The first two digits of the parameter number will be blinking.
You now require to access Service Level:
1. Use the up and the down buttons to change the first two digits to 99 and then press the +
button
2. The second two digits will then blink. Use the up and down buttons to change these two
digits to 99 and then press the set button (tick to confirm)
3. The parameter value on the display will now be "0"
4. Use the up and the down button to change the parameter value to "738" and then press the
Set (tick) button to confirm.
The controller is now in Service level. SErv will be displayed.
The parameter below should now be set to 0 value.
Parameter
Level
Group
Code
S
43
00
S
43
10
S
43
20
S
43
30
*Please note this should only be done when Frost protection is done via Glycol.
W:
www.seconrenewables.com
% Monoethylene glycol inhibitor
Freezing temperature*
Capacity
Power absorbed
Pressure drop
Function description
Frost protection on room temperature
0=disable
1=enable
Frost protection by outside temperature
0=disable
1=enable
Frost protection based on outgoing water temperature
0=disable
1=enable
DHW storage frost protection
0=disable
1=enable
T: 0191 516 6554
Glycol Levels
10%
-4°C
0,996
0,990
1,003
Default
1
1
1
1
E:
20%
30%
-9°C
-15°C
0,991
0,983
0,978
0,964
1,010
1,020
Display and input value
Min.
Max.
Unit
0
1
-
0
1
-
0
1
-
0
1
-
info@seconrenewables.com
40%
-23°C
0,974
1,008
1,033
Remarks
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