18
®
Model MSX Make-Up Air
1. Check the Voltage
Before starting the heater, compare the supplied
voltage, hertz, and phase with the heater’s nameplate
information.
2. Airflow Interlock
With the supply fan on, verify the electric heater’s
airflow interlock (DDS) is made.
3. Set the Unit’s Operating Temperature
Set the operating temperature by adjusting the
discharge temperature selector. Typical settings are
65-70°F (18-21°C).
Start-Up - Electric Heater (optional)
WARNING
Disconnect and lock-out all power before
performing any maintenance or service to the unit.
Failure to due so could result in serious injury or
death and damage to equipment.
NOTE
If the heater is equipped with an optional inlet
air sensor the heater will not energize unless the
outdoor air temperature is less than the inlet air
sensor’s set point.
Refer to the Start-Up Checklist in the Reference
section before proceeding further!
Pre Start-Up Check
Check all electrical connections. Tighten any loose
connection to all components including contactors,
heating elements and main power lugs.
