Page 42
CBX32MV
Cooling Operation
Room thermostat
calls for first
stage?
Air Handler Control receives inputs on Y1 terminal.
Y1 terminal on Control is configured as input and passes
signal from room thermostat to outdoor unit.
Y1 input to the Control will control the indoor blower according to the cooling
or heating mode blower speed, ramping and adjust selection jumper pins.
Room thermostat calls for
second stage?
Still calling for first
stage?
Y2 terminal on Control is
configured as input and passes
signal from room thermostat to
outdoor unit.
Y2 terminal is an
input to the Control.
The indoor blower
will be controlled
according to the
jumper pin
selections.
Still calling for second
stage?
NOTE - The outdoor unit control directly
controls the outdoor unit operation.
De-energize Y1 (and O in cooling) terminals
on Control.
De-energize indoor blower per ramping
profile.
No
Yes
Control on-board link must be cut between Y1 and Y2 to allow 2 stage
cooling operation.
Air Handler Control Indoor Blower Mode Speed and Profiles settings
1. Set Cooling Mode Blower Speed jumper pin.
2. Set Cooling Mode Blower Ramping jumper pin.
3. Set Blower Adjust Selection jumper pin.
Single or Two-Stage Unit
NOTE - The outdoor unit control directly controls the outdoor
unit operation.
De-energize Y2 terminal on Control.
Indoor blower speed will reset to Y1
demand.
NOTE - The outdoor unit control directly
controls the outdoor unit operation.
NOTE - The outdoor unit control
directly controls the outdoor unit
operation.
YesYes
Yes
Yes
No
No
CUT ON-BOARD LINK Y1-Y2 FOR
TWO-STAGE A/C
Y1-Y2
2-STAGE
COMPR
R-O
HEAT
PUMP
R-DS
DEHUM
OR
HARMONY
CUT FOR OPTION
RECOMMEND — USE FIGURE 19 AS A REFERENCE FOR SETTING
JUMPER CONFIGURATIONS ON THE AIR HANDLER CONTROL.
IMPORTANT - Use care when cutting links to prevent damage to
control. See Figure 19, CBX32MV jump and link guide for further
details.
To Next Page
Loading...
Need help?
General
