Master 21420 Quick Start Manual

1. APPLICATIONS
The M420 chronothermostat has been designed
to control the temperature in heating circuits (boi-
lers, fancoils, floor heating systems, circulation
pumps, etc.)
2. FIXING OPERATION
Warning: the equipment must be only installed by
qualified technicians in compliance with with the
scheme diagram printed on the product and the
instructions of this guide. Please follow strictly the
safety instructions already in use.
In order to grant protection class n.2, please follow
precisely the hints given in this installation guide.
The device has been designed to be installed in dry
and closed rooms in normal conditions. The device
is suitable for 1B circuits in compliance with CEI
EN 60730 norms.
1. Remove any side adapters present and cut the 6
lateral teeth present on the device. Install the
Modo/Mix adapter ring on the thermostat (A)
2. Make all the electrical connections
3. Fix the screws on the support to the 3 modules
box already embedded in the wall (B) away from
kitchens, heat points, windows, doors, etc. and a
height of 1.5 meters above the floor. It is convenient
to the final side of the tube from where the cables
come.
4. Install the plate by pressure (C)
REMOVE THE 6 HOOKS FOR THE MODO AND MIX PLATES
DO NOT FIX THE SIDE ADAPTORS
B
A
C
3. CONNECTIONS
Connect with 2 wires the terminals 1-2 to the instal-
lation, substituting the traditional thermostat in any
moment, without adding any other connection.
M420 is equipped with a relay with a contact switch,
without any tension, for direct control of: boilers,
circulating pumps, zone valves with servo heat
control, air conditioning installations with fans and
fancoils.
Terminal 4 is free and can be used for the on-off
control of servo motors with two directions of traffic
or other uses to be studied each time individually.
Please note: The terminal bar is removable, so
after making the connections can be separated
from the body of the device.
4 2 1
Item no. 21420 • 31420 • 36420
FLUSH MOUNTING M420 CHRONOTHERMOSTAT WEEKLY
PROGRAMMABLE 3 MODULES FOR MODO AND MIX SERIES
4. BATTERIES
Pull out the front drawer and insert 3 AAA 1.5 V
long life alkaline batteries, paying attention to
polarity as indicated. When you'll notice that the
display is flashing or tends to fade, charging the
batteries is no longer sufficient and their replace-
ment is required.
During the time required for replacing the batteries,
the set data won't be lost.
After replacing the batteries, the display will flash
again until M420 won't require the installation
activation.
Pull out
the front drawer
paying attention to polarity
5. OPERATION
Operation with standard programs
After you have installed and connected it, simply
follow the below indicated operations:
P
S
H
I
1 Move the S key on PROG position
2 Move the P key on the first position
3 Set the time with the keys H
4 Set the day of the current week by pressing the
D key
1 Monday 2 Tuesday
3 Wednesday 4 Thursday
5 Friday 6 Saturday
7 Sunday
5 Move the S key on AUTO position
6 Verify that the I switch is on Winter
R
R eset button. Holding it for a few seconds,
all the programs set are deleted, and restores the
standard program.
FROM MONDAY TO FRIDAY
°C
20
17
11,30
6,30 8,30 13,30
ON SATURDAY AND SUNDAY
°C
20
17
8
Operation with manual program
The manual operation keeps constant over time the
temperature modality chosen between comfort,
economy and frost protection
excludes the executed program.
S
1 Move the S key on M manual position.
2 Press the T key to select the temperature index to
match with manual operation:
insert 3 AAA 1.5 V
alkaline batteries,
COMFORT
6. PERSONALIZATION
Time and temperature at the user's choice,
please follow the steps below:
Choose the two operating temperatures,
associated to temperature COMFORT
ECONOMY
R
D
S
1 Move the S key on PROG position.
2 Move the P key on the second position.
3 Press the T key to display:
COMFORT
4 Adjust the temperature with the H button
corresponding to the indication selected.
5 Press the T key again to change the temperature
and repeat the operation at point 4.
Time scheduling
combined with temperature
1 Move S key on PROG position.
2 Move P key on the third position.
3 Adjust the time of first intervention with H key.
4 Move the P key to the next position and H key to
adjust the time of the second intervention.
5-6-7-8 Shift P key to the next positions by adjusting
with the H button the timetable for action, repeating
operations n.3 and n. 4.
Please note: All six timing operations must be
programmed.
If you they are not needed (in order to use only two
or four steps), please program with the same time
17 22
two or more interventions consecutive programmed
with the same time cancel each other.
9 Once programmed times per each day, press D
key to change the day and repeat steps from 2 to 8
for all other days of the week. If the program of a day
is good enough for the following days, you can copy
it using the COPY function with C key
22,30
and completely
T
ECONOMY ANTIFREEZE
and
indications.
P
C D
, ECONOMY