Ventacity Systems VSCM Series - Page 22

22
Rev. 01.01
INSTALLATION
4. INSTALLATION
4.8.1D ROOM TEMPERATURE SENSOR
(Module A)
●Lowvoltageinput:10kNTCthermistor
●Cable: Two conductors with a minimum cross-
section of 20 AWG [0.5 mm
2
] and maximum
lengthof164ft[50m].
●Use: Control HRV set point temperature to
ambient temperature in room.
Congurefrommainmenu.See
page 31 for details
4.8.1E INDOOR AIR QUALITY SENSOR
●Lowvoltageinput:0-10VDC
●Cable: two conductors with a minimum cross-
section of 20 AWG [0.5 mm
2
] and maximum
lengthof164ft[50m].
●Any 0-10V sensor supported. Advanced
congurationavailableforCO
2
,RH,VOC.
Congurefromservicemenu.See
page 31 for details
4.8.1F PIR/OCCUPANCY SENSOR
(Module B)
●Low voltage switching contact: maximum
possible contact load 12 V, 0.4 A.
●Cable: two conductors with a minimum cross-
section of 20 AWG [0.5 mm
2
] and maximum
lengthof164ft[50m].
●The contact is normally closed. When opened,
the HRV unit operates according to the pre-set
ventilation output.
Congurefromservicemenu.See
page 33 for details
55
56
-t°
43
44
-
+
GND
GND
24VDC
0-10V
IAQ
Sensor
15
16
4.8.1A BOOST BUTTON (Module A)
●Low voltage switching contact: maximum
possible contact load 12 V, 0.4 A.
●Cable: two conductors with a minimum cross-
section of 20 AWG [0.5 mm
2
] and maximum
lengthof164ft[50m].
●The contact is normally open. Unit reacts to
rising edge of signal. Boost button can activate
but not deactivate boost mode.
Boost
1413 1413
4.8.1B FIRE CONTACT (Module A)
●Low voltage switching contact: maximum
possible contact load 12 V, 0.4 A.
●Cable: two conductors with a minimum cross-
section of 20 AWG [0.5 mm
2
] and maximum
lengthof164ft[50m].
●The contact is normally closed. When
disconnected, the HRV unit operates according
to the pre-set output.
The required output can be set in the
service menu. See page 32.
151615 16
4.8.1C EXTERNAL CONTROL (Module A)
●Low voltage switching contact: maximum
possible contact load 12 V, 0.4 A.
●Cable: two conductors with a minimum cross-
section of 20 AWG [0.5 mm
2
] and maximum
lengthof164ft[50m].
●The unit responds to the rising/falling edge of
the signal (opening / closing)
• Transition from open to closed turns unit on
• Transition from closed to open turns unit off
ON
1817 1817
OFF
1817 1817
PSU