VAH | 155
Vertical / Horizontal Air Handler
Due to our policy of continuous product innovation, some specications may change without notication.
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Controls Features
• Auto changeover (Heat Recovery only)
• Auto operation
• Auto restart
• External on / off control
• Dual thermistor control
• External static pressure control
• Group control
• Hot start
• Self diagnostics
• Timer (on / off)
• Weekly schedule
• Fan speed control
• Dual set-point control*
• Filter life display*
• Multiple auxiliary heater applications*
• Wi-Fi compatible
• Auto fan
• Leak detection
cooling cycle operations.
1. Wall-mounted wire controller
2. Factory-mounted return air thermistor or the optional wall-
mounted wired remote temperature sensor.
The microprocessor controls space temperature using the value
provided by the temperature sensor sensing a space temperature
that is farthest away from the temperature set-point. A single indoor
unit has the capability of being controlled by up to two local wired
controllers. The microprocessor control provides a cooling or heating
mode test cycle that operates the unit for 18 minutes without regard
to the space temperature. If the system is provided with an optional
local or central controller, displayed diagnostic codes are specific
and provide the service technician with the reason for the code
displayed.
Handling Condensate
The drain pan is designed to work with a gravity building drain sys-
tem. If condensate lifts/pumps are needed, they are to be field-pro-
vided. A secondary drain port plug is provided allowing the pan to be
drained for service. Condensate float safety switch connections are
available on the main control board for connection of a field supplied
float safety switch.
Condensate Drain Pan
The condensate drain pan is constructed of HIPS (high impact
polystyrene resin).
Coil
The indoor unit coil is constructed with grooved design copper tubes
with slit coil fins, 2 to 3 rows, 18 fins per inch.
Mechanical Specications
VERTICAL / HORIZONTAL AIR HANDLER
*To enable Generation 4 features, outdoor unit DIP Switch No. 3 must
be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S
Engineering Manual for additional information.
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