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MHGRVX-A2
AAON MHGRVX-A2 Technical Guide
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18
MHGRVX-A2 Module T
echnical Guide
LCD SCREENS
Protected Screens
Protected Screens Map
Refer to the following map when navigating through the LCD
Protected Screens. From the main screen, press the
<ENTER>
twice
until you get to the SOFTW
ARE Screen. Then hold the
<UP>
button
for ve
seconds.
T
o scroll through
the rest
of the screens,
press the
<MENU>
button.
MHGRVX
1176
v
XXX
S/A MODE,
SA MODE LOCKED
OR COMM MODE
SOFTWARE
1176
v
XXX
Hold
for five seconds.
CONFIG
DIAGNSTC
ENTER TO
EXIT
17
19
Table of Contents
Table of Contents
3
Overview
5
MHGRVX-A2 General Information
5
Figure 1: MHGRVX-A2 Dimensions
5
Wiring
6
Installation and Wiring
6
Table 1: MHGRVX-A2 Electrical and Environmental Requirements
6
MHGRVX-A2 to AAON Unit Controller Wiring
7
Figure 2: MHGRVX-A2 to AAON Unit Controller Wiring
7
MHGRVX-A2 Stand-Alone Wiring
8
Figure 3: MHGRVX-A2 Stand-Alone Wiring
8
Inputs and Outputs
9
Inputs
9
Table 2: MHGRVX-A2 Inputs and Outputs
9
Outputs
10
Operation Modes
11
Modes of Operation
11
Additional Features
13
Lcd Screens
14
Navigation Keys
14
Figure 4: LCD Display and Navigation Keys
14
Table 3: Navigation Key Functions
14
Main Screens Map and Main MHG REHEAT Screens
15
Status and Alarm Screens
16
Setpoint and Force Valves Screens
17
Protected Screens
18
Troubleshooting
21
LED Diagnostics
21
Table 4: STATUS LED Blink Codes
21
Table 5: ALARM LED Blink Codes
21
Alarms
22
Figure 5: MHGRVX-A2 LED Locations and Descriptions
22
Other Checks
23
Table 6: 0-3V Temperature Sensor - Voltage and Resistance for Type III Sensors
23
Table 7: 0-5V Temperature Sensor - Voltage and Resistance for Type III Sensors
24
Appendix A: Sat Sensor
25
Supply Air Temperature Sensor Installation
25
Figure 6: Supply Air Temperature Sensor Installation
25
SAT Sensor Wiring Guide and Jumper Settings
26
Table 8: SAT Wiring Conditions
26
Appendix B: Compatibility
27
MHGRVX Series Drop-In Replacement
27
Appendix C: Reheat Expansion Module
28
Features and Dimensions
28
Figure 7: Reheat Expansion Module Dimensions
28
Installation and Wiring
29
Wiring
30
Figure 8: Reheat Expansion Module(S) Wiring
30
Operation Modes
31
Table 9: Reheat Expansion Module ALARM LED Blink Codes
31
LED Diagnostics and Troubleshooting
32
Figure 9: Reheat Expansion LED Locations and Descriptions
32
Appendix D: Frequently Asked Questions
33
Troubleshooting
33
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AAON MHGRVX-A2 Specifications
General
Brand
AAON
Model
MHGRVX-A2
Category
Control Unit
Language
English
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