■■ External contact: A high voltage input signal for external
contact is present. If the external contact is activated,
device behaviour depends on its configuration on site:
-- Presence detection (empty room with hotel door
card), Energy saving mode is activated, internal
temperature is raised by 4 °C in cooling mode and
reduced by 4 °C in heating mode.
-- Window Contact: During OFF mode (window open),
all outputs are disconnected (fan, valves, etc.) and
only the frost protection function is active if it has been
enabled by its corresponding dip-switch.
■■ Master/Slave control:
-- Thermostat type A_AC and B_AC: the Control Board
for grouping accessory (42N9006) is allowing fan
speed relay only (water valves have to be wired/
relayed separately) up to 300 units with control on Air
temperature (no water valve), or 10 units 2 pipe with
water control, or 5 units 4 pipe with water control
-- Thermostat type C_EC and D_EC: The Thermostat
EC motor version can control up to 10 LEC units
by wiring in parallel the analogue 0-10 two-wires
output signal (water valves have to be wired/relayed
separately).
NTC controller
■■ This is a communicating PID controller, combining energy
saving algorithms and full control function solutions,
compatible with the Aquasmart Evolution system package.
■■ The NTC controller can manage the EC motor option,
and combines energy savings with optimised comfort.
WTC Controller
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AIR TREATMENT
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Open Communication protocol BACnet or LON
Communication PID controller
Large range of user interfaces wall mounted or remote
Manage the motorized louvers of the grill in manual
or automatic
Manage the EC motor to optimise the comfort
Manage a CO2 sensor to improve Air Quality
Optional Light and/or Blinds management modules
from same user interface
Large range of sensors (light, presence, etc.)
Moulded valve insulating shell
■■ Valve actuators: a wide choice of actuators is available with
two or four-way valve bodies to offer the right solution for
any controller type and customer 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
■■ When combined with LEC motors and the NTC controller,
floating three-point 230-V actuators are recommended to
increase energy savings and enhance comfort.
Auxiliary drain pan
■■ An auxiliary drain pan is available as an accessory if
the water valves, stop valves or balancing valves are
customer-supplied. The auxiliary drain pan is not required
with Carrier factory-fitted water valves, as they are factorysupplied with the valve body insulated (moulded insulating
shell) to prevent condensation.
Auxiliary drain pan for compact 42GW_S/E 200/209,
300/309, 400/409 units
Valve options
■■ Valve body: both the two-way or four-way (three-way
with integrated bypass) valve options are factory-fitted and
tested. The chilled-water valves are fully insulated within a
moulded insulating shell, preventing condensation on the
valve body. This new shell reduces the complexity of the
offer and prevents water leakage risk. Valves are factoryfitted on the unit side.
Auxiliary drain pan for large 42GW_S/E 500/509,
600/609, 701/709 units
Electric heater option
■■ Electric heater option is available only with 2-pipe coil
versions. One heating capacity is available per Idrofan
cassette size, factory-fitted to ensure safe and reliable
operation.
Fresh air inlet option
■■ All units have connections for fresh air ducts that can
considerably improve indoor air quality while fresh air
volume is managed by the CO2 sensor through NTC
control.
■■ The fresh air flow must be less than 10% of the total air
flow, to avoid operating problems and excessive noise.
For higher air flow a primary air kit is available that uses
the pre-punched hole for air ducting to an adjacent room
and a baffle so that the fresh air is introduced into the
room through a diffuser.
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