The first option is the simplest form of control it does not allow control with the air conditioner system. The mechanical switch is straightforward to install as it only involves the switching of the relays. If required the fan speed or the damper can be fixed in a particular mode

The Second option allows the VN unit to be enabled from an indoor unit this utilizes the RBC-SMFI Fan interface. This link means the unit needs to be operated in conjunction with an associated indoor unit.

Option 3 is a low voltage option, which gives a dedicated controller for the VN unit this control option, will allow a Heater to be controlled to protect the fabric of the unit. This option can also be integrated with the indoor units via the RBC-SMFI fan interface.

Controls:

· ON/OFF (switch 1)

· Fan Speed - High/Low (switch 2)

· Mode - Bypass/Heat Exchange (Damper on/off) (switch 3)

For some of the smaller projects, this may be the most convenient and cost effective solution.

If the requirements are for the heat exchanger unit to be turned ON whenever a certain fan coil unit is turned ON; then using a RBC-SMFI is the solution. Two switches as introduced in option 1 above should be used for the fan speed and damper operation and control.

· Fan Speed - High/Low (switch 1)

· Mode - Bypass/Heat Exchange (Damper on/off) (switch 2)

More than one heat exchanger unit can be connected to the same indoor fan coil unit. In order to do so, the heat exchanger units need to be wired in parallel.

However, the current may be too large and an additional higher amperage relay (provided by others) may be required. The RBC-SMFI would then turn the relay ON.

The Wall Mounted LCD Heat Exchanger Controller is the RBC-VNC1. The controller MUST be used with the Heat Exchanger PCB (RBC-VNP1) (Incl Pre-Heat, or Re-Heat Control). The PCB is a direct replacement for the original supplied PCB in the heat exchanger unit.

Controls:

· ON/OFF

· Fan Speed - High/Low

· Mode - Bypass/Heat Exchange (Damper on/off)

· Heater - Adjustable Pre-Heater or Re-Heater activation temperature (if heaters are provided)

In addition to the RBC-VNC1 and RBC-VNP1, a RBC-SMFI can also be connect to the PC board of one indoor unit for ON/OFF option via an indoor fan coil unit.

One RBC-VNC1 and one RBC-VNP1 are required for each heat exchanger unit (even if a heater is not fitted).

Heat Exchanger PCB (Incl Pre-Heat, or Re-Heat Control)

Control by Interactive Intelligence can be achieved with the use of DI Modules (RBC-DI1-E). Each of the functions will require one of the eight outputs available from a DI Module:

Output 1 - On/Off

Output 2 - High/Low Fan Speed

Output 3 - Bypass/Heat Exchange (Damper on/off)

Output 4 - Heater On/Off (if applicable)

The DI module will then be connected to the Windows Package via the AB network.

One RBC-VNP1 will be required for every heat exchange ventilation unit (even if a heater is not fitted).