Maico WR 310 Notice De Mise En Service Et D'entretien page 76

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Pre-requirements for connection on
switching contact: Brine earth heat ex-
changer is selected under Switching contact
parameter ( Chapter 6.2).
The T-air inlet offset heating is needed so that
when a brine earth heat exchanger and PTC
heat register are present in the ventilation
unit, heating is first undertaken using the heat
exchanger. An electric heat register is only
activated when the temperature drops further.
T-air inlet hysteresis cooling relates to the
Cool T-supply air min parameter  Chap. 6.5.
Conditions for heating
Switch on brine CP when
● T-air inlet (air temperature in outside air
connector) < minimum air inlet temperature
(factory setting) + T-air inlet offset heating.
Switch off brine CP with uncontrolled
pump when
● T-air inlet (air temperature in outside air
connector) > minimum air inlet temperature
(factory setting) + T-air inlet offset heating
+ 1 K.
Switch off brine CP with controlled pump
when
● the control voltage has fallen to 0 V.
76
Conditions for cooling
Switching on brine CP
The air is cooled when all 3 conditions are
met:
● Summer season.
Does not apply to simple control unit in solo
mode because the Season parameter is not
queried.
● T (room temperature) > set maximum
R
room temperature ( Chapter 6.5) + 1 K
● T-air inlet (air temperature in outside air
connector) > Cool T-supply air min (
Chapter 6.5) + T-air inlet hysteresis cooling.
To prevent the circulating pump from synchro-
nising, the temperature at the air inlet must be
greater than the minimum air inlet tempera-
ture by the set amount of hysteresis.
Switching off brine CP
The air is no longer cooled if one of the fol-
lowing conditions is met:
● T (room temperature) < set maximum
R
room temperature ( Chapter 6.5)
or
● T-air inlet (air temperature in outside air
connector) < Cool T-supply air min (
Chapter 6.5)
The circulating pump switches off if the tem-
perature at the T-air inlet sensor falls below
the minimum T-air inlet because the minimum
supply air temperature Cool T-supply air min
cannot be maintained.
With a controlled pump, when the switch-on
temperature is reached, a defined voltage
is set so that the Cool T-supply air min. is
reached. The temperature can then be main-
tained with the minimum use of energy.
The pump is switched off as soon as the
defined voltage falls to
0 V as a result of control.