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ICE CFA1120A-3360A & CGA3180A I&O Manual 03/2021 Rev.5
4.
Airflow Requirements:
This is maximum external static pressures for duct design. Duct pressure drop not to exceed these values.
Maximum Static
Pressures
CFA1120-1180/3150
CFA3180 CFA3240 CFA3300 CFA3360 CGA3180
IWG
1.6
1.4
1.6
0.8
1.0
Pa
398
348
398
149
249
Keep duct lengths as short as possible. Do not obstruct airflow through the unit.
Duct work should be designed and installed in accordance with
all
applicable safety codes and
standards. Industrial Climate Engineering strongly recommends referring to the current edition of
the National Fire Protection Association Standards 90A and 90B
before
designing and installing duct
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. There must be no obstruction
24" from the sides of the unit, or 120"from the front of the unit. Additional clearance is required in
high ambient temperatures, greater than 120°F (49°C).
MODEL
MIN. CLEARANCE
AROUND SIDES
(SINGLE UNIT)
MIN. CLEARANCE
BETWEEN UNITS
(TWO UNITS)
MIN. SPACE
ABOVE UNIT
MIN. SPACE
BEHIND UNIT
All Models
24 inches (61 cm)
24 inches (61 cm)
24 inches (61 cm) 120 inches (305 cm)
Table 7. Minimum Clearances
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 and below maximum specified values listed below.
Refer to the data sticker on the unit for ampacity requirements.
Note:
Operation near the Minimum or Maximum limits at extended periods voids the waranty.
Power supply should be at nominal Voltage.
Electrical Rating Designations*
A
C
D
Z
Nominal Voltage
208/230
208/230
460
575
Phase
1
3
3
3
Minimum Voltage
197
197
414
518
Maximum Voltage
253
253
506
632
* Letters refer to model number code designations. Refer to page 5.
Table 8. Voltage Limitations
3.3 Installation Materials
The CFA or CGA may be shipped with a top bracket and optional 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 unit, remove the bracket and reattach as described in Section 2.5
