Start-Up And Check Out - Industrial Climate Engineering MiniPac ECUA06ACA A2 Series Operation And Installation Manual

3. If the unit is mounted outside, a small bead of silicone should be applied to the perimeter. Additionally,
weather flashing should be installed over the top rear edge.
4. Place ECU on cabinet and attach to cabinet with high strength mounting screws. Use all holes to
ensure stability and a tight seal.
5. Route condensate tube to outside of the cabinet. The condensate tube must not be higher than the
bottom of the ECU.
IMPORTANT: The unit weighs 85 pounds. If the unit is installed to the cabinet door, make certain that
the door and hinge can support the weight of the ECU.
1.8 Start-Up and Check-Out
Cooling Test
Turn power off to the unit. Before checking unit in cooling mode, ensure all high and low voltage wiring
is correct and secure. Remove front panel/door and turn the time delay to "min", fully counterclockwise.
Next apply power to unit and observe temperature reading on digital thermostat. Using instructions
found in Section 1.10, set thermostat to cooling mode (stage 1 set to"CI"); i.e., if room temperature is
72°F (22°C), set thermostat at 60°F (15°C). Replace the front panel. Failure to replace the front panel
will result in unit failing on "freeze stat" operation. Unit will now run in cooling. The condenser blower
will NOT come on immediately, but may, depending on temperature/humidity conditions, cycle on and
off or run continuously. After a run period of five minutes, a temperature difference of approximately
20°F (11°C) should be felt between the supply and return air. The actual temperature difference varies
with outdoor temperature and indoor conditions. After completing test, ensure temperature set points
are returned to customer requirements and time delay is set back to 5 minutes.
Heating Test (if applicable)
Before checking unit in heating mode ensure all high and low voltage wiring is correct and secure.
Remove front panel/door and locate the digital thermostat. Note: Only applies to units with internal
thermostats. Now, apply power to the unit and, referring to set-up instructions in Chapter 1, make sure
the thermostat is set so it is NOT calling for cooling, i.e., no "S1" indicator is showing. Next, set "S2"
in the heating mode to call for heat; i.e., if room temperature is 72°F (22°C), set "H2" set point at 85°F
(29°C0. Replace front/door panel. The unit's supply blower and electric heat should now be operational.
Quickly, a difference between the supply and return air of approximately 20°F (11°C) at 208V and
25°F (14°C) at 240V should be measured. The unit will NOT run in the heating mode if the digital
thermostat is showing a "S1" set signal; i.e., cooling. After completing test, remove front panel/door
and return the set points on the thermostat to customer requirements.
Terminal Functions
1. Compressor
2. Not Used
3. Not Used
4. Electric Heat
5. Lock-Out Relay Signal (normally open)
6. Not Used
7. Lock-Our Relay Signal (common)
8. Not Used
9. 24 VAC Common
10. 24 VAC
10 ECUA06 7/2014 new