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Premium Commercial Controls
ERV
28
UNIT OPERATION
UNIT STATUS CONDITIONS
STATUS SHOWN
MEANING
Unit on
The unit is on and running.
Unit switched off due to alarm
The unit is off by a serious alarm.
Unit switched off by BMS
The unit is off by command from the BMS.
Unit switched off by time band
The unit is off by the scheduler.
Unit switched off by digital input
The unit is off due to contacts across 17 and 18 open.
Unit switched off by local keypad The unit is off by the setting on the menu screen.
Exhaust Fan Only Mode
The unit is in single fan mode with exhaust fan running.
Supply Fan Only Mode
The unit is in single fan mode with supply fan running.
Cool Locked Out by BMS
A BMS command has the cooling locked out.
Heat Locked Out by BMS
A BMS command has the heating locked out.
Device Test
The system is in device test mode for more than an hour.
Sens Ovrd Active
The system has a sensor overwritten for more than
24 hours.
Off by CO2 Level
The CO2 level exceeds limit.
Frost Control On
Unit is in frost control mode.
5.1.1. Digital Input (ID1) Unit On/Off
The digital input across terminals 17 and 18 must be closed to turn the unit on. It can be
jumpered if not used. Some of the uses are a remote switch, a smoke detector or a motion/
occupancy sensor. The unit can also be supplied with an optional drain overflow switch that is
wired into this input. Shown are the accessories are offered by RenewAire.
5.1.1.1 Optional Smoke Detector
Normally field-installed on the discharge duct, near the furnace.
FIGURE 5.1.0 SMOKE DETECTOR
5.1.1.2 Optional Motion Sensor
Used for occupancy-based ventilation, hardwired to the low-voltage terminal strip.
FIGURE 5.1.1 MOTION SENSOR (CEILING MOUNT)
FIGURE 5.1.2 MOTION SENSOR (WALL MOUNT)