Parameter Settings; Adjustment And Safety Devices - DeDietrich MS 24 MI FF Operating And Installation Instructions

To set the boiler parameters, press (
activate, the "F01" appears on the display alternating with the value of the parameter shown.
Edit parameters
+/–
• Press ( ) to scroll through the parameters;
+/–
• Press ( ) to edit each parameter;
• Press ( , to save the changes. "MEM" appears on the display;
)
i
• Press ( , to exit without saving. "ESC" appears on the display.
)
Description of parameters
Type of boiler
F01
10 = sealed chamber 20 = atmospheric chamber
Gas used
00 = METHANE
F02
01 = LPG
02 = METHANE (WITH DIAPHRAGM)
Hydraulic system
00 = instantaneous appliance
03 = appliance with external storage boiler
F03
04 = appliance for heating only
13 = preheating (24h)
14 = preheating (1h)
Setting programmable relays 1 and 2 (See SERVICE instructions)
F04/ F05
00 = no associated function
Maximum CH setpoint (°C)
F06
00 = 85°C - 01 = 45°C (function unavailable)
F07 DHW inlet priority configuration
F08 CH max. output (0-100%)
F09 DHW max. output (0-100%)
F10 Min. heating output (0-100%)
Delay prior to new ignition in CH mode
F11
(00-10 minutes) - 00=10 seconds
F12 Diagnostics (See SERVICE Instructions)
F13-F14-F15 Factory settings
Anti-legionella function (with F03=03)
F16 00 = disabled
55...67 = enabled (setpoint °C)
CH pressure sensor selection
F17 00 = hydraulic pressure sensor
01 = hydraulic differential pressure sensor
F18 Manufacture information

22. ADJUSTMENT AND SAFETY DEVICES

The boiler has been designed in full compliance with European reference standards and in particular is fitted with the
following:
• Air pressure switch (model 24 MI FF - 24 FF)
This device only allows the burner to ignite if the exhaust flue duct is in perfect working order.
In the event of one or more of the following faults:
• flue terminal obstructed
• venturi tubes obstructed
• fan blocked
• venturi tube connection - pressure switch tripped
the boiler remains on standby and error code E03 is displayed (see table in section 10).
• Fumes thermostat (model 24 MI - 24)
This device has a sensor positioned on the left section of the fumes hood and shuts off the gas flow to the main burner
if the flue is obstructed and/or if there is no draught.
In these conditions the boiler shuts down and displays error code E03 (section 10).
After eliminating the problem, press button ( ), for at least 2 seconds to re-ignite immediately.
It is forbidden to disable this safety device
INSTALLATION INSTRUCTIONS

21. PARAMETER SETTINGS

– –
) and ( ) together and hold down for at least 6 seconds. When the function is
85
Factory settings
24 MI FF 24 FF 24 MI
10 10 20
02
13 04 13
00
00
00 01 00
100
100
00
03
--
00
00
00
00
24
20
04
01
71.03982.03 - EN