CCI Thermal Technologies FX5 - Explosion-Proof Electric Air Unit Heater - Manual (Page 7)

7
Rear View of Heater
FIGURE 8 FIGURE 7A
FIGURE 6
Fan
rotation
1“ NPT opening
for field wiring
Air
intake
Motor
junction box
Optional factory
installed built-in
room thermostat.
Optional factory
installed built-in
disconnect.
Connect supply conductors
to this side of contactor.
For a 1-phase
heater, use these
contactor lugs.
Contactor load
side terminals, this
side for factory
wiring only.
Active and spare
fuses (see parts list)
Printed circuit board’s
terminal block
Control enclosure
and cover
Do not install conduit below heater (see Figure 3).
Control Enclosure & Field Wiring
Air exits through
louvers.
3. Heater may be supplied with a factory installed built-in integral
disconnect. (See Figure 7B)
Field Wiring for Integral Disconnect:
a. Power Supply conductors and Ground conductor pass through
1"NPT opening of Disconnect Enclosure (see Figure 7B).
Supply conductors to be wired to Disconnect Switch inside.
Ground conductor to be wired to Ground Lug fastened to inside
of Disconnect Enclosure.
b. If applicable, Remote Room Thermostat conductors pass
through 3/4"NPT opening (see Figure 7b) and are to be wired to
printed circuit board terminals marked “T’STAT”.
c. To reduce risk of ignition of hazardous atmospheres, conduit
runs must have a sealing fitting connected within 18 inches
(457 mm).
Factory installed conduits require no further sealing. Integral
Disconnect is sealed at factory.
4. The internal grounding terminal in the control enclosure (or in the
integral disconnect enclosure when this option is provided) shall
be used as the equipment grounding means. An external bonding
terminal is provided for a supplementary bonding connection where
local authorities permit or require such a connection.
Sealed at Factory
Switch load side
terminals, this
side for factory wiring
only.
1" NPT
(Power Supply)
3/4" NPT
(Remote Room
Thermostat
if applicable)
Terminals marked
“T’STAT”
Connect Supply Conductors to
this side of Switch
For a 1-phase heater use these
Switch terminals
FIGURE 7B
Optional Built-in Disconnect
& Field Wiring
F I N A L I N S P E C T I O N
1. Before application of electrical power:
a. Check that all connections are secured and comply with the
applicable wiring diagram (see Figure 9) and code requirements,
b. Confirm that the power supply is compatible with the data plate
rating of the heater,
c. Remove any foreign objects from the heater,
d. Install all covers and verify that all enclosures are well secured, and
e. Ensure that the fan rotates freely. See Figure 6 for proper direction
of fan rotation.