Conventional Thermostat Sequence Of Operation - Trane Symbio 700 Application Manual

Conventional Thermostat Sequence of Operation

When the Odyssey system is configured to operate with a conventional thermostat, the controller
provides protection for the system (see General Support Sequence section) and continues to
provide insight to operating conditions. A conventional thermostat can be applied with constant
volume cooling only, heat pump, and single zone 2-speed fan configured systems. While not
recommended, a conventional thermostat can be applied to single zone variable volume
configured systems, but the system is limited to staged fan control instead of a fully variable
sequence.
When under conventional thermostat control, the equipment responds directly to operating
requests from the thermostat device. Each thermostat input corresponds to a specific unit
function, as described in the following tables. Equipment protection functions and compressor
minimum on/off timers remain in-control, even when under conventional thermostat control.
Table 2. Cooling only/electric heat systems
X Y1
NA OPEN
NA OPEN
NA OPEN
NA CLOSED
NA OPEN CLOSED
NA CLOSED CLOSED
NA X
X=ignored by controller
14
Inputs
W1/O
Y2 W2
OPEN OPEN OPEN
OPEN CLOSED OPEN
OPEN X CLOSED
OPEN OPEN OPEN
OPEN OPEN
OPEN OPEN
X X X
Supply
Supply
Fan On/
Fan Speed
G
Off
Request
Request
CLOSED ON Min
X ON Max
X ON Max
X ON Min
X ON Min
X ON Max
X OFF
Outputs
Compres- Auxiliary
sor Cool
Heat
Stage Stage
Request Request
None None
Stage 1
None
Full Stage
None
Stage 1
None
Stage 1
None
Full Stage
None
0 None None
ACC-APG001A-EN
Heat Cool
Mode
Status
Fan Only
Heat
Heat
Cool
Cool
Cool
OFF