Marvair Scholar 2.0 I&S Manual 04/2022 Rev.2
28
Figure 6a. Remote Wall Mounted
Thermostat Wiring Detail
Figure 6b. Remote Thermostat w/Humidity
Controller Wiring Detail
D. For Scholar 2.0 heat pump or air conditioner that interfaces with a building
automation system (BAS) or energy management system (EMS), detailed
instructions for the specific system being installed will be supplied separately by
the manufacturer of the BAS/EMS system.
The control of the GreenCube ERV and Ventilation relay (VR) are 24 volt
inputs to the PLC. If 120 V. of 240 inputs are required, additional relays must
be installed in the factory or in the field. The EMS is tied to the float switch and
will shut the system down if the switch is closed (indicating the drain pan water
reached its limit). For end user control of the EMS, refer to Figure 7.
For immediate shut down of unit, provide a normally open contact and connect
on parallel with float switch.
The unit control system is factory wired to operate upon an input signal from any
appropriate 24 VAC control thermostat or DDC control system.
The unit control system is factory wired to energize the ventilation package. If
additional control of the ventilation package is desired, it may be accomplished
by the following: The Controls Contractor must remove the factory installed
jumper between terminals Vent and 24V R then provide a set of contacts (24 VAC
pilot duty) between terminals Vent and 24V R. When the field supplied contacts
between Vent and 24 V R are closed the ventilation package will operate and
energize the blower. See Figure 10. Alternatively, you may disconnect the GWR
jumper and provide 24V to the Vent input.
Ventilation can be tied into a scheduling system to turn the ventilation off during
unoccupied times and and back on during occupied times.
This would still keep the float switch in the system to shutdown the unit if water in
the drain pan gets too high and also provide emergency shutdown from customer
system.
The Exhaust fan motor speed can be adjusted on the PLC “Fresh Air Motor”
screen.
Содержание Marbair VAA2030-2048-2060
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