AAON MHGRVX-A2 User Manual

9MHGRVX-B2 Module Technical Guide
INPUTS AND OUTPUTS
Inputs
I/O Map
The following inputs and outputs are available on the MHGRVX-B2.
See Table 2, this page to reference the input and outputs.
NOTE: All analog and 24 VAC contact closure inputs are
used only in Stand-Alone Mode.
Table 2: MHGRVX-B2 Inputs and Outputs
Analog Inputs
SAT: Supply Air Temperature Sensor
Used in Stand-Alone Mode and when MODGAS is connected.
The Supply Air Temperature Sensor is the main control input.
This sensor has to be installed for the unit to operate. The Supply
Air Temperature Sensor is located in the discharge air stream and
monitors the HVAC unit’s Supply Air Temperature to maintain the
Supply Air Temperature Setpoint.
RST IN: Reset Signal
Used only in Stand-Alone Mode. The Discharge Temperature
Setpoint can be reset by supplying a 0-10 VDC signal to the RESET
IN low voltage terminal block. This reset signal is optional and need
only be used if you require resetting of the discharge air temperature.
AUX IN: Auxiliary Reheat Valve Input
Used when AUX mode is congured as enabled. This input looks
at a 0-10 VDC signal to control the valve position.
• 0VDC = 0% Reheat Valve position
• 5VDC = 50% Reheat Valve position
• 10VDC = 100% Reheat Valve position.
Analog Outputs
0-10V VLV: 0-10 VDC Valve Signal
Used when controlling a valve that uses a 0-10 volt signal to drive it.
Binary Inputs
REHEAT EN: Reheat Enable Contact
Used only in Stand-Alone Mode. When a call for dehumidication is
initiated by another controller, this interlocked 24 VAC wet contact
closure is used to enable the MHGRVX-B2.
HEAT OVR: Heating Override
Used only in Stand-Alone Mode. When a call for heating is initiated
by the HVAC unit, this interlocked 24 VAC wet contact closure is
used to override the MHGRVX-B2 Dehumidication Mode.
COOL OVR: Cooling Override
Used only in Stand-Alone Mode. When a call for cooling is initiated
by the HVAC unit, this interlocked 24 VAC wet contact closure is
used to override the MHGRVX-B2 Dehumidication Mode.
ANALOG INPUTS
1 Supply Temperature
2 Reset Signal
3 AUX Input
ANALOG OUTPUTS
1 0-10 VDC Valve Signal
BINARY INPUTS
1 Reheat Enable
2 Heating Override
3 Cooling Override
RELAYS
1 Fan
2 Compressor
3 Flush Active Signal / Compressor 2
4 Auxiliary / Reversing Valve

AAON MHGRVX-A2 Specifications

General

Brand	AAON
Model	MHGRVX-A2
Category	Control Unit
Language	English