Interklima Terminal Units
PCE -VS ñ Hydronic cassette
29
2.F Fan mode
ñ Indoor fan runs at the set speed while MTV is turned off. AUX1
and AUX2 are opened.
ñ Indoor fan speed can be adjusted for low, medium,
high and auto.
2.G Heat mode
ñ If Tr≤Ts-1
o
C, heat operation is activated. MTV is turned on.
AUX1 is closed. Indoor fan runs at set speed.
ñ If Tr>Ts, heat operation is terminated. MTV is turned off.
AUX1 is opened. Indoor fan runs according to POST HEAT
condition.
ñ The range of Ts is 16 to 30
o
C.
ñ Indoor fan speed can be adjusted for low, medium, high and
auto.
ñ When turned on, MTV requires 30 seconds before it is fully
open.
ñ When turned off, MTV requires 120 seconds before it is fully
closed.
ñ When the unit is turned off, indoor fan will delay for 5 seconds
before it is turned off.
2.G.1 Pre-Heat
ñ If Ti<38
o
C, when MTV is on, AUX1 is closed and indoor fan
remains off.
ñ If Ti>38
o
C, when MTV is on, AUX1 is closed and Indoor fan
runs at set speed.
ñ If indoor coil temperature sensor is damaged, pre-heat time is
set for 2 minutes and indoor fan runs at set speed.
2.G.2 Post-Heat
ñ If Ti>38
o
C, when MTV is off, AUX1 is opened and indoor fan
continues to run at set speed.
ñ If Ti<38
o
C, when MTV is off, AUX1 is opened. Indoor fan runs
30 seconds and stops 3 minutes repeatedly.
ñ If indoor coil temperature sensor is damaged, post-heat time
is set for 3 minutes with indoor fan running at set speed.
2.G.3 Over heat protection of indoor coil
ñ If Ti≥75
o
C, MTV is turned off, AUX1 is opened and indoor fan
remains on and runs at set speed.
ñ If Ti<70
o
C, MTV is turned on. AUX1 is closed and indoor fan
remains on and runs at set speed.
ñ If indoor coil temperature sensor is damaged, the protection
mode will become obsolete and the unit will work as the Pre-
heat and Post-heat set times.
2.H Dehumidification mode
ñ If Tr≥25
o
C, MTV will be ON for 3 minutes and OFF for 4
minutes.
ñ If 16
o
C≤Tr<25
o
C, MTV will be ON for 3 minutes and OFF for
6 minutes.
ñ If Tr<16
o
C, MTV will be turned off.
2.I Auto heat-Dehumidification-Cool mode
ñ In auto mode, the set temperature of the system is 24
o
C and
the indoor fan runs in auto fan mode.
ñ If Tr<21
o
C, the unit will operate in heat mode.
ñ If Tr>25
o
C, the unit will operate in cool mode.
ñ If 21
o
C≤Tr≤25
o
C, the unit will operate in dehumidification
mode.
ñ Once the unit is turned on in auto mode, it will operate in that
mode and will not changeover.
ñ If the unit has been turned off for 2 hours, when turning on the
unit, it will select the operating mode depending on the room
temperature.
2.J Auxiliary contacts
2.J.1 Cool mode (AUX 2)
ñ AUX 2 is closed when MTV is on (in normal operation).
ñ AUX 2 is opened when MTV is off or protection of indoor
coil is operating.
2.J.2 Fan mode (AUX 1 AND AUX 2)
ñ AUX 1 and AUX 2 are opened when indoor fan is on.
2.J.3 Heat mode (AUX 1)
ñ AUX 1 is closed when MTV is on (in normal operation).
ñ AUX 1 is opened when MTV is off or protection of indoor coil
is operating.
2.K Sleep mode
ñ Sleep mode can only be set in cool or heat modes.
ñ In cool mode, after sleep mode is set, the indoor fan will run
at low speed and Ts will increase 2
o
C during 2 hours.
ñ In heat mode, after sleep mode is set, the indoor fan will run
at auto fan mode and Ts will decrease 2
o
C during 2 hours.
ñ Changing of operation mode will cancel sleep mode.
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