17
Accessories
Duct electric heaters for RTC and
RTH07L to 30L
These duct electric heaters are designed to provide backup
heat in the RTH units, and complementary heat in the RTC
units. On and off cycles are governed by the air conditioning
equipment control system. They should be fitted directly in
the impulse outlet of the indoor section of the unit.
Technical specifications
These duct electric heaters include the following compo-
nents:
- Galvanised sheet casing, covers and supports.
- Exposed nickel-chrome wire electric resistance mounted
on steatite supports.
- Power supply contactor with a 24 VAC.
- Two thermal switches located at the top of the heater. The
first, with automatic reset, disconnects the heater when a
temperature of 77°C is reached. The second, accessible
externally and with manual reset, disconnects the heater
when a temperature of 138°C is reached.
- Interlock with the indoor fan thermal relay. The control
system of the unit does not allow operation of the heater
when the indoor fan thermal relay fails.
- Plug-in connector for interconnection between the control
panel of the air conditioning unit and the heater.
- PVC gasket for heater-air conditioner joint and self-thread-
ing screws for fastening the accessory.
General dimensions mm
Model
A B C D E F G H I J
RTC and RTH07L a 10L
400 378 285 385 275 362 320 300 - 353
RTC and RTH15L a 30L
527 505 325 425 350 490 380 427 145 412
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