Orion System VCM Controller - Manual (Page 36)

Technical Guide
VCM Controller 36
By using all (4) of the available 4 Relay Expansion Boards and the 4
relay outputs available on the VCM controller, you have the ability to
configure up to a combined total of 20, Heating Stages, Cooling Stages,
and options 3 through 11 listed above.
OE356 Binary Expansion Board #1
Note: The Binary Inputs require wet contacts (24 VAC
only) to recognize an active input. If you provide dry
contacts, the contact closure will not be recognized
BIN1 – Exhaust Hood On Input
When this wet contact input closes the VCM controller switches from
Indoor Air Control to Outdoor Air Control. This is typically used on
CAV applications requiring Dual Damper (Hood On/Off) Modes.
BIN2 - Dirty Filter Contact Closure Input
This wet contact input is required for Filter Status Indication and re-
quires a Differential Pressure Switch to initiate “Dirty Filter” indica-
tion.
BIN3 – Proof of Flow Input
A Proof of Flow Switch that provides a wet contact closure whenever
the HVAC unit Supply Fan is operating can be connected to this input.
If the Proof of Flow Switch contact opens while the Supply Fan is op-
erating, all Heating and Cooling is suspended or disabled. The Proof Of
Flow Switch is an optional input. This means the VCM controller must
be configured by the user to recognize this input signal.
BIN4 – Remote Forced Occupied Mode Input
When this wet contact input closes, it will force the VCM controller
into the Occupied Mode. When the Remote Forced Occupied Signal is
removed, the controller will revert to the Unoccupied Mode of opera-
tion if no internal or external schedule has been configured or is in
effect when this occurs.
OE356 Binary Expansion Board #2
BIN1 – Remote Forced Heating Mode Input
This wet contact input is used to provide a means for another BAS or
control device (by others) to force the unit into Heating Mode when it
closes. See the Note regarding Remote Force Mode Setting that fol-
lows at the end of this section.
BIN2 - Remote Forced Cooling Mode Input
This wet contact input is used to provide a means for another BAS or
control device (by others) to force the unit into Cooling Mode when it
closes. See the Note regarding Remote Force Mode Setting that fol-
lows at the end of this section.
Note: Remote Forced Heating or Cooling Modes require that
the user enter zero values for both the Heating and
Cooling Setpoints for the HVAC Mode Enable. The
VCM Controller will then look for wet contact
closures on the Remote Forced Cooling Mode and
Remote Forced Heating Mode inputs to enable the
HVAC Modes. If both the Remote Forced Heating and
Remote Forced Cooling Modes are active, the unit will
operate in Vent Mode. The unit may also be operated
in Vent Mode by providing a wet contact closure
signal to the Remote Occupied Input.
BIN3 – Smoke Detector Input
This wet contact input is used to initiate shutdown of the HVAC unit
when a Smoke Detector (by others) contact closure occurs. The con-
troller remains active and can initiate alarm relays.
BIN4 – Remote Forced Dehumidification
This wet contact input is used to provide a means for another BAS or
control device (by others) to force the VCM controller into Dehumidi-
fication Mode.
Note: When using the Remote Forced Dehumidification
function the user must set the Dehumidification Spt
Indoor RH to 100% for the Remote Forced
Dehumidification feature to function.
Inputs & Outputs