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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.
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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
Summary of Contents for RTC07L
Page 13: ...13 Wiring diagram RTC07L 230 1 50 ...
Page 14: ...14 Wiring diagram RTC10L and 15L 400 3 50 ...
Page 15: ...15 Wiring diagram RTC20L 25L and 30L 400 3 50 ...
Page 19: ...19 RTC and RTH07L to 30L Heater location ...
Page 20: ...20 Wiring diagram Heater 5kW 230 1 50 RTC and RTH07L ...
Page 21: ...21 Wiring diagram Heater 5 10 15kW 400 3 50 RTC and RTH07L to 30K ...
Page 23: ...23 Location of components Fig 1 Connection of hoses at electric box Fig 2 ...
Page 25: ...25 Wiring diagram for RTC 07L 10L and 15L ...
Page 31: ......
Page 32: ...www johnsoncontrols com ...