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Specified Controls SC-Z20 - Page 6

Specified Controls SC-Z20
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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