Electrical Supply; Installation Materials; Table 4 Minimum Clearances; Table 5 Voltage Limitations - Industrial Climate Engineering ECUA90 Installation & Operation Manual

work. The duct system must be engineered to insure sufficient air flow through the unit to prevent
over-heating of the heater element. This includes proper supply duct sizing, sufficient quantity of
supply registers, and adequate return and filter areas. Duct work must be of correct material and must
be properly insulated. Duct work must be constructed of galvanized steel with a minimum thickness
of .019 inches. Duct work must be firmly attached, secured, and sealed to prevent air leakage. See
section 2.4 for additional duct work requirements.
5. Clearances:
Note the minimum clearances required for proper operation and service.
MODEL
ECUA90/120
6. Codes:
Make sure your installation conforms to all applicable electrical, plumbing, building, and municipal
codes. Some codes may limit installation to single story structures.

7. Electrical Supply:

The power supply must have the appropriate voltage, phase, and ampacity for the model selected.
Voltage must be maintained above minimum specified values listed below. Refer to the data sticker
on the unit for ampacity requirements.
2.3

Installation Materials

The ECU is shipped with a top bracket and lifting brackets. The top bracket provides a method of sealing
the top of the unit from water intrusion. The bracket is shipped attached to the top of the unit. Before
installing the ECU, remove the bracket and reattach as described in Section 2.5
The Lifting brackets are shipped attached to the back panel of the ECU. These brackets provide a method
for lifting the ECU. The installation of the brackets is described in Section 2.6.
MIN. CLEARANCE AROUND
SIDES (SINGLE UNIT)
24 inches (76 cm)
Table 4. Minimum Clearances
Electrical Rating Designations*
Nominal Voltage
Phase
Minimum Voltage
Maximum Voltage
* Letters refer to model number code designations. Refer to page 5.
Table 5. Voltage Limitations
MIN. CLEARANCE BETWEEN
UNITS (TWO UNITS)
18 inches (46 cm)
A C
208/230 208/230
1 3
197 197
253 253
12
MIN. SPACE
ABOVE UNIT
24 inches (61 cm)
D Z
460 575
3 3
414 518
506 600
ECU 12/2014 NEW