CCI Thermal Technologies FX5 - Explosion-Proof Electric Air Unit Heater - Manual (Page 16)

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P R I N T E D C I R C U I T B O A R D
1. After removing the printed circuit board (P.C. Board) bracket assembly
from the control enclosure, separate the P.C. Board from the bracket
by cutting off the plastic spacers (see Figure 18).
2. Reinstall a new factory supplied P.C. Board onto the mounting bracket
using new non-conducting spacers of the same length. Spacers are
supplied with a new P.C. Board. Reinstall the control circuit ground
wire to the printed circuit board bracket (see Figure 9).
C O N TA C T O R
1. Loosen, but do not remove contactor mounting screws. Slide
contactor off mounting screws.
2. Replace with a factory supplied contactor of the same rating.
T R A N S F O R M E R
1. Replace with a factory supplied transformer of the same rating.
2. On the new transformer, select primary wires to match heater voltage.
Ensure that the correct transformer secondary lead is grounded (see
Figure 9). Individually terminate all unused wires using closed
end connectors.
F U S E
Replace fuse with one of the same type and rating as indicated on P.C.
Board or refer to parts list. An extra fuse should be stored in the clips
marked “SPARE”.
H E AT I N G E L E M E N T S
Heating elements are an integral part of the vacuum charged core. A factory
exchange core can be shipped immediately from stock. Refer to “Core”
section for details.
C A B I N E T PA N E L S
Bolt-on cabinet panels are individually replaceable.
FIGURE 17
FIGURE 16
1/16” to 3/16”
(1.6 to 4.8mm)
FIGURE 15
FIGURE 18