HYDRONIC DUCTED FAN COIL UNITS 42NL & 42NH
Options Specifications
Electric heater (option for 2-pipe coil)
Electric heater-resistance wire type
■■ Supply voltage: 230 V - 1 ph - 50 Hz
■■ Heater size and capacity per unit (+5% ; -10%):
Electrical Heater
Capacity
42NH/NL 2-5
42NH/NL 2-9
42NH/NL 3-5
42NH/NL 3-9
42NH/NL 4-5
42NH/NL 4-9
42NH/NL 5-5
42NH/NL 5-9
42NH 6-5
42NH 6-9
42NH 7-5
42NH 7-9
Low
Medium
High
Very High
1 x 500 W
1 x 500 W
1 x 500 W
1 x 500 W
2 x 500 W
1 x 500 W
2 x 500 W
2 x 500 W
2 x 500 W
2 x 500 W
2 x 500 W
2 x 500 W
1 x 800 W
1 x 800 W
1 x 800 W
1 x 800 W
2 x 800 W
1 x 800 W
2 x 800 W
2 x 800 W
2 x 800 W
2 x 800 W
2 x 800 W
3 x 500 W
1 x 1000 W
1 x 1000 W
1 x 1000 W
1 x 1000 W
2 x 1000 W
1 x 1000 W
2 x 1000 W
2 x 1000 W
2 x 1000 W
2 x 1000 W
2 x 1000 W
3 x 800 W
NA
NA
1 x 1600 W
1 x 1600 W
NA
1 x 1600 W
NA
NA
2 x 1600 W
2 x 1600 W
2 x 1600 W
3 x 1000 W
■■ The heater is protected with a dual safety device:
a) Self-holding automatically reset integrated safety
thermostat
b) Destructive thermofuse link
■■ Available for 2-pipe coil only.
WARNING: Minimum air flow must be maintained
to avoid damaging the electric heaters.
A minimum control signal of 3V is selected by
default with Electronic Carrier controller (NTC /
WTC). To prevent low airflow with 42NL range,
plenum cannot be chosen as an option.
Fresh air controller (option)
■■ Constant volume fresh air controller
The fan coil can be fitted with a constant fresh air flow
controller adjustable from 15 m3/h to 180 m3/h to allow control
of the introduction of fresh air and of the air change rate.
The fresh air supply can be located in the air supply plenum,
in the air return plenum or in the side of the base unit casing
for compact design.
The fresh air controller may be modified on site by relocating
the damper (adjustable screw). Three ranges of air-controller
are provided: 15 to 50m3/h, 60 to 100m3/h and 110 to
180m3/h.
IMPORTANT: If an optional return air temperature
sensor is provided, the constant fresh air flow rate
must not exceed 50% of the unit supply air flow rate
at minimum speed.
■■ Variable volume fresh air controller
The unit can be equipped with an optional variable fresh air
flow controller from 0-55 l/s (0-200 m3/h). It is connected to
the numeric Carrier controller and can regulate the fresh air
intake in two ways:
-- Either using a fixed rate set by the installer that can be
reconfigured as required
-- Or based on the CO2 level; in this case it is connected
to a CO2 sensor via the Carrier numeric controller.
1
AIR TREATMENT
NOTE: To operate correctly,the fresh air flow
controller requires a differential pressure in the range
of 60 Pa to 210 Pa.
2
Example: Range 50-100 m3/h
1
2
3
C
Air Damp er
Fresh airflow damper position setting (in m3/h)
Airflow adjustment screw
A
R
R
I
E
R
2
0
1
6
NOTE: With the variable fresh air flow controller the
upstream pressure in the fresh air duct must be 180 Pa.
/
2
0
1
7
653
CONTROLS
3