1 CONNECTING THE WEATHER DEPENDANT CONTROL
The appliance has been prepared for Weather Dependant Control. The control unit already has
provision for the cable connector and there are two holes for the PG7 cable glands in the
underside of the appliance.
1.1
Connecting the cable connector K4B
The cable connector K4b has to be connected into the appliance on the left, behind the control unit
and beneath the connection for the room thermostat.
Instructions
a)
Remove the two screws from the control panel.
(Fig1)
b)
Remove the casing.
c)
Remove the selection resistance
from the control
unit. Push the wires of the cable connector K4b
into the connector beneath the recognition
resistance.
First find two yellow wires (return
sensor) and then two orange wires (outside
sensor) beneath this resistance. Put the connector
of the selection resistance back into the control
unit (Fig 2).
d)
Press the connector at the other end on the 4
holes in the bracket.
e)
Remove the ‘blind’ grommets from the bottom of
the appliance and install the cable glands.
Connecting the cables in the cable connector
Fold over the blank end of the cable so that it
makes good contact in the cable connector.
1.2
Connecting the outside sensor
The outside sensor comes in a casing without a connection lead. A standard two-wire lead may be
used such as would be used for a room thermostat. Note, however, that the cable is a sensitive
signal category and should be kept away from mains cables.
To avoid problems with moisture, the sensor should be placed with the cable outlet downwards
and the lowest part of the cable (on outside wall) should always be lower than the hole in the wall.
(Fig. 3).
Preferably, the outside sensor should be mounted to a north facing wall. Don’t put the sensor
somewhere where it might be affected by (the warmth of) sun light, chimneys, air vents or an open
window.
Fig 1
Fig 2
ATMOS MULTI Weather Dependant Control
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Summary of Contents for Multi
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