SC-Z20 PANEL TIME DELAYS
FUNCTION
NORMAL MODE
SPEED UP MODE
MINIMUM TIME IN HEAT OR COOL MODE
15 MINUTES
60 SECONDS
(Once the system is in the heat or cool mode,
it will remain there for a minimum of 15
minutes. The equipment may or may not be
on during this period)
MINIMUM OFF TIME REQUIRED BEFORE
5 MINUTES
20 SECONDS
THE EQUIPMENT CAN SWITCH FROM
HEAT OR COOL MODE
TIME BETWEEN STAGES (UP-STAGING)
10 MINUTES
40 SECONDS
EQUIPMENT MINIMUM ON/OFF TIME
5 MINUTES
20 SECONDS
FAN RUN TIME AFTER CLOCK
5 MINUTES
20 SECONDS
CONTACTS OPEN
SC-Z20 SYSTEM STATUS LED DEFINITIONS AND FUNCTIONS
Time Delay Speed - Up
RED
BLINKS when time delays are in speed up mode
Discharge Air Sensor
GREEN
ON when DAS is connected
BLINKS when 1st stage heat or cool go out
on limit
Status
GREEN
BLINKS to confirm microprocessor operation
Zones (1-20)
RED (Heat)
ON when there is a call for heating
GREEN (Cool)
ON when there is a call for cooling
HVAC System
W1
GREEN
ON when first stage heat is energized
W2
GREEN
ON when second stage heat is energized
Y1
GREEN
ON when first stage cooling is energized
Y2
GREEN
ON when second stage cooling is energized
G
GREEN
ON when fan is energized
O/B
GREEN
ON when reversing valve is energized
Occupied
GREEN
ON when system is in occupied mode.
Mode
RED (Heat)
ON when system is in the heat mode
GREEN (Cool)
ON when system is in the cooling mode
SYSTEM SET UP SWITCH DESIGNATIONS
HC
Conventional Heat/Cool System
HP
Heat Pump System
B
Energizes the reversing valve on a call for heating
O
Energizes the reversing valve on a call for cooling
2 ZONES
Two zones must call to energize the equipment
3 ZONES
Three zones must call to energize the equipment
(When both switches are OFF, the default is 1)
ON OFF
HP
HC SYSTEM
B O REV VALVE
3 ZONE OFF MINIMUM
2 ZONES OFF CALLS
Speed Up Mode auto-resets after 15 minutes