Contact: AIRSYS North America Phone: (855) 874-5380 Page 31 of 112
Email: ASNSupport@air-sys.com Web: http://airsysnorthamerica.com Rev 1.15
Complete Electrical Connections
Cautions
Danger. Only an authorized service technician should make the electrical connections to the
WPUs and the controller box.
Important. The electrical wiring of the unit must comply with IEC standards or with appropriate
national standards.
Danger. The power supply must be disconnected or turned off before working on the unit.
Important. Noncompliance with these instructions may cause damage to the WPU or the
controller box. Not following instructions can void the warranty.
Important. No modification to the unit’s electric circuit is allowed. If a change is required, it must
be authorized by AIRSYS in writing.
Output Alarms
Output alarms are dry contract outputs from the ASMUC to a remote monitoring block/station. Consult
the ASMUC wiring diagram in Appendix B for wiring locations.
High/Low Temp Alarm
A high temp alarm will trigger when the indoor temperature has exceeded the high temperature setpoint
for at least 1 minute. The default high temp trigger is 18°F above the main setpoint and can be changed
under “Alarms” in the HVAC Config menu. A low temp alarm will trigger when the indoor temperature has
dropped below the low temperature alarm setpoint (default 32°F below setpoint). The default output
setting is Normally Closed (NC), which can be changed to Normally Open (NO) in the “Alarms” menu
under the HVAC Config Menu.
HVAC Alarms
An HVAC alarm indicates one or more major alarms that will prevent a unit from Mechanical Cooling. This
includes:
• High and low refrigerant pressure (only affects mechanical cooling)
• Power loss
• Fan overload / airflow alarm
• Communication failure
• Failure of both indoor and backup indoor temperature sensors
The ASMUC.6 controller provides three dry contact outputs for HVAC fail alarms. If more connections are
needed, multiple HVAC alarms may be wired in series if NC or in parallel if NO.
Note: The negative leads must be landed on the alarm common (Terminal 47).
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