Valves And Actuators (Option) - Carrier 42NL Original Instructions Manual

Example: Range 50-100 m
1 Air Damper
2 Fresh airflow damper position setting (in m
3 Airflow adjustment screw
The fresh air controller may be modified on site by
relocating the damper (adjustable screw). Three ranges of
air-controller are provided: 15 to 50m
110 to 180m /h.
3
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.
NOTE: To operate correctly,the fresh air flow controller
requires a differential pressure in the range of 60 Pa to
210 Pa.
4.2.2 - 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 m
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 CO
to a CO sensor via the Carrier numeric controller.
2
NOTE: With the variable fresh air flow controller the
upstream pressure in the fresh air duct must be 180 Pa.
14
3
/h
3
/h)
3
/h, 60 to 100m
3
/h). It is
3
level; in this case it is connected
2

4.3 - Valves and actuators (option)

NOTE: The motor valve assembly is normally closed.
1
4.3.1 - Valve actuators
A wide choice of actuators is available with two or four-way
valve bodies (three-way with integral bypass) to offer the
right solution for any controller type and customer
2
requirement, from on/off to proportional types, with either
230 V or 24 V power supply:
• On/off 230 V actuator
• On/off 24 V actuator
• Floating 3-point 230 V actuator
• Floating 3-point 24 V actuator
• Modulating 0-10 V/24 V actuator
When combined with LEC motors and WTC or NTC
controllers, floating 3-point 230-V actuators are
recommended to increase energy savings and enhance
comfort.
/h and
3
NOTE: 24V power supply actuators are not compatible
with Carrier controllers (Thermostats A/B/C/D, WTC &
NTC).