Lennox DAVE LENNOX SIGNATURE CBX32MV User Manual

CBX32MV / Page 4
CONTROLS
iComfort
®
Control
Advanced control board
communicates information about
various operating parameters
in the air handler to the optional
iComfort
®
S30 Thermostat or
iComfort Wi-Fi
®
Thermostat to
constantly maintain the highest
level of comfort, performance and
efciency available.
Auto Conguration - On start-up
the control board automatically
sends a description of the unit to the optional iComfort
®
S30 Thermostat or iComfort Wi-Fi
®
Thermostat to
automatically congure the number of stages and
features available.
Connections for connecting a conventional heating/
cooling thermostat are also provided on the board.
Board also features:
• Lennox Humiditrol
®
Whole Home Dehumidication
System (EDA) compatible.
• EEPROM storage of all local congurations.
• Non-volatile memory storage of 100 alarm codes with
display of last 10 codes for troubleshooting.
• Connections for optional outdoor temperature
sensor (communicates temperature on RSBUS to
thermostat).
• Controls evaporator humidity by controlling blower
and compressor staging on two-stage outdoor units.
• Two stages - HEAT and COOL (with four different
air volume selections for each) are made by simple
jumper pins on board.
• ADJUST jumper pin allows approximately 10%
higher, normal or 10% lower motor speed selection
within HEAT and COOL speeds selected for ne
tuning air volume.
• DELAY jumper pin allows selection of blower motor
de-humidication proles during cooling mode.
Option 1 - Motor runs at 100% of capacity until demand
met. Once demand is met, motor ramps down to stop.
Option 2 - Cooling: When cool demand is initiated,
motor ramps up to 100% and runs at 100% until
demand is satised. Once demand is met, motor runs at
100% for 45 seconds, then ramps down to stop.
Heat Pump: When heat pump demand is initiated, 30
second motor on delay starts. After the motor on delays
expires, motor ramps up to 100% and runs at 100%
until demand is satised. Once demand is met, motor
runs at 100% for 45 seconds, then ramps down to stop.
Option 3 - Motor runs at 82% of capacity for
approximately 7.5 minutes, then 100% capacity (if
needed) until demand is satised. Once demand is met,
motor ramps down to stop.
H
Option 4 - Motor runs at 50% capacity for 30 seconds,
then 82% capacity for approximately 7.5 minutes. If
demand is not satised, motor runs at 100% capacity
until demand is met. Once demand is met, motor runs at
50% capacity for 30 seconds, then ramps down to stop.
Display LED - Seven segment LED displays alpha-
numeric information related to diagnostics as well
as system operation and status. Diagnostic codes
are held in non-volatile memory, immune from power
interruptions. Holds up to ten diagnostic codes in order
of occurrence for recall on demand. Port on blower door
allows for easy viewing.
Dehumidication (Active or Humiditrol
®
Option) - A
jumper on the control board must be clipped to
enable active dehumidication and/or operation with
a Humiditrol Whole-Home Dehumidication System.
A humidity controlling thermostat or device is also
required. During a call for cooling, air volume is
automatically reduced, forcing humidity removal by the
air conditioner or heat pump system. After the humidity
has reached the desired set-point the cooling air volume
returns to its designed rate. A dehumidication signal
from the thermostat reduces the cooling cfm to 70% of
the requested cooling cfm.
Electric Heat Operation - Control for up to three
electric heat stages.
EvenHeater
®
Electric Heat Control - Up to four electric
heat stages are available when utilizing the
EvenHeater
®
control feature furnished on the iComfort
®
control. EVENHEAT jumper position on control board
determines target discharge air temperature of 85°F,
100°F, 115°F or 130°F. Default setting is 85°F. An
optional Discharge Air Sensor is required.
Heat Pump Operation - A jumper on the control board
must be clipped to enable operation with a single or
two-stage heat pump. The indoor blower is started
without delay when a call for heat is received.
Two Stage Cooling Operation - A jumper on the
control board must be clipped to enable operation with
a two-stage air conditioner. The cooling blower speeds
for rst and second stage cooling will be dictated by the
applicable DIP switch settings.
Lennox System Operations Monitor Connection -
Monitors outdoor unit operation. (communicating mode).
Continuous Blower Speed - Adjustable continuous
blower speed is a percentage of the high cooling speed
selection. There are four selectable options (via DIP
switch settings) of 28%, 38% (default setting), 70% and
100%.
Transformer - 70VA transformer furnished as standard.
Factory installed in the unit control box.
Accessory Terminal - One 24 volt humidier output is
furnished for non-powered humidiers.
Control board is factory installed in the unit control box.
FEATURES
4 of 44 B17-0056
01/19/2017

Lennox DAVE LENNOX SIGNATURE CBX32MV Specifications

General

Type	Variable Speed Air Handler
Refrigerant	R-410A
Airflow	Up to 2000 CFM
Warranty	10-Year Limited Warranty
Nominal Cooling Capacity	1.5 - 5 Ton
Nominal Heating Capacity	Match with heat pump or furnace
Blower Motor	Variable Speed ECM
Filter	MERV 16