Specifications

16
ENVISION COMMERCIAL SPECIFICATION CATALOG
Low Pressure
This lockout mode occurs when the normally closed low
pressure switch is opened for 30 continuous seconds (set
at 40 PSI). A low pressure fault may also be indicated
when a Comfort Alert lockout has occurred.
Freeze Detection
(Water Flow)
This lockout mode occurs when the freeze thermistor tem-
perature is at or below the selected freeze sensing point
(well 30°F or loop 15°F) for 30 continuous seconds.
Condensate Overflow
This lockout mode occurs when the condensate overflow
level has been reached for 30 continuous seconds.
Blower RPM
The control board monitors blower RPM to sense opera-
tion. This lockout mode occurs if the blower RPM falls
below the low RPM limit (100 RPM) for 30 continuous
seconds (ECM only).
Operation Logic Data Table
OPERATION LOGIC
HEATING COOLING
Blower ON SL1 - IN ON
STG1 STG2 STG3 EMERG STG1 STG2
SINGLE SPEED UNITS
Compressor
On On On Off On On - -
ECM2 Normal
Med High High High Med High Low -
ECM2 Dehumidify
Med High High High 85% Med 85% High Low -
PSC
On On On On On On On -
Rev Valve
Off Off Off Off On On - -
Loop Pump
On On On Off On On - On
Aux Heater
Off Off Staged Staged Off Off - -
Secondary 1- Out
On On On Off On On - -
Emerg LED
Off Off Off On Off Off Off -
T-Stat Signal
Y1 Y1, Y2 Y1, Y2, W W Y1, O Y1, Y2, O G -
DUAL CAPACITY UNITS
Compressor-Lo
On Off Off Off On Off - -
Compressor-Hi
Off On On Off Off On - -
ECM2 Normal
Med High High High Med High Low -
ECM2 Dehumidify
Med High High High 85% Med 85% High Low -
Rev Valve
Off Off Off Off On On - -
Loop Pumps
On On On Off On On - On
Aux Heater
Off Off Staged Staged Off Off - -
Secondary 1- Out
On On On Off On On - -
Secondary 2- Out
Off On On Off Off On - -
Emerg LED
Off Off Off On Off Off - -
T-Stat Signal
Y1 Y1, Y2 Y1, Y2, W W Y1, O Y1, Y2, O G -
Envision Controls - Premier cont.