Engineering Notes - Lennox LXRCC10 Application Manual

Engineering notes

Mounting, installation
and commissioning
notes
Technical data
Power supply
6
In systems with automatic changeover, the temperature sensor can be replaced by an
external switch for manual changeover.
In systems with continuous heating operation, no sensor will be connected to the con-
troller's input.
With continuous cooling operation, the controller input (B2–M) must be bridged.
Mounting location: on a wall or inside the fan coil unit. Not in niches or bookshelves, not
behind curtains, above or near heat sources and not exposed to direct solar radiation.
Mounting height is about 1.5 m above the floor. The connecting wires can be run to the
controller from a recessed conduit box.
Check the settings of the DIP switches no.1 through no.5 (with the RCC10) and of no.1
and no.2 (with the RCC10.1) and change them, if required. If setpoint limitation is re-
quired, use the minimum and maximum limitation facility (energy saver). After applying
power, the controller makes a reset during which the fan LED flashes, indicating that
the reset has been correctly made. This takes about 3 seconds. Then, the controller will
be ready to operate.
• Prior to fitting the changeover sensor, thermal conductive paste must be applied to
the location on the pipe where the sensor is placed
• The cables used must satisfy the insulation requirements with regard to mains poten-
tial
• Sensor inputs B1–M and B2–M carry mains potential. If the sensor's cables must be
extended, the cables used must be suited for mains voltage
The controller is supplied with Mounting Instructions.
Operating voltage
Frequency
Power consumption
Control outputs Q1, Q2, Q3
Rating
Control output Y11 (N.O. contact)
Rating
Control output Y12 (N.C. contact)
Rating
Signal input B1 for return air sensor
Signal input B2 for changeover-sensor
AC 230 V + 10/-15 %
50/60 Hz
max. 6 VA
AC 230 V
max. 600 VA
AC 230 V
max. 300 VA
AC 230 V
max. 300 VA
QAH11.1, Safety class II
NTC resistor 3kΩ at 25°C
QAH11.1, Safety class II
NTC resistor 3kΩ at 25°C