TP-6714 4/10112 Section 8 Accessories
8.7 Heater
An anti-condensation heater kit is available. The strip
heater is controlled by a hygrostat to raise the
temperature inside the enclosure above the dew point to
prevent condensation. Figure 8-17 shows a typical
location of the heater kit components inside the
enclosure.
The installer must connect 120 VAC power to the
terminal block near the hygrostat. See Figure 8-16. The
heater and hygrostat are connected to power through a
15-amp circuit breaker.
The relative humidity setting on the hygrostat is
adjustable from 35% to 95%. A setting of 65% is
recommended.
Because of space limitations in the smaller enclosures,
the following models can include either an enclosure
heater or a surge suppressor (TVSS), but not both:
Model KCS 30--200 Amps
Model KSS 40--225 Amps
1. 120 VAC power connection terminal block
2. Circuit breaker
3. Relative humidity adjustment control
GM71056
3
2
1
Figure 8-16 Hygrostat Assembly, Typical
1. Hygrostat assembly, see Figure 8-16
2. Strip heater with guard
1
GM69824
2
Right Side View
Figure 8-17 Heater Location, Typical
GM71278
HYGROSTAT
HEATER
CIRCUIT
BREAKER
TERMINAL
BLOCK
120 VAC ONLY CUSTOMER
SUPPLIED
Figure 8-18 Heater Connections
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