(83A) Cool Stage 2-Off Delta; (84A) Compressor Cool Stage 2 Upstage Delay (Cc2Sud); (85A) Compressor Heat Stage 2 Upstage Delay (Ch2Sud); (88A) Reversing Valve Delay (Rvd) - Lutron Electronics PALLADIOM Configuration Manual

Step 5: Set the SMC55-HWQS Advanced Parameters to Modify the
Functionality of the HVAC System
Parameters Applicable to Conventional and Heat Pump Systems
(83A) Cool Stage 2 – Off Delta
Use this parameter to identify the temperature below the cool setpoint when Cool Stage 2 should turn off. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Cool Stage 2-Off Delta for Conventional and Heat Pump
systems.

(84A) Compressor Cool Stage 2 Upstage Delay (CC2SUD)

Use this parameter to identify the time delay after the first stage of cooling has started before the Stage 2 for cooling starts. Refer to
Figure 10 below for the upstage delay before the Stage 2 of cooling is turned on.
Figure 10: Upstage Delay Before Starting Cooling Stage 2
Energizing O/B valve - Enable
cooling
Call Input for Compressor
Y - Compressor
1
signal out
Y - Compressor
2
signal out
G - Fan On

(85A) Compressor Heat Stage 2 Upstage Delay (CH2SUD)

Use this parameter to identify the time delay after the first stage of heating has started before the Stage 2 of heating starts.

(88A) Reversing Valve Delay (RVD)

Applicable System: Heat pump only.
Use this parameter to identify the time delay required for energizing the reversing valve. RVD is used to ensure that the reversing
valve is fully energized before turning on the compressor. This delay is used in the following scenarios:
a. Turning on the SMC55-HWQS.
b. Transitioning from heating to cooling and from cooling to heating (after MCOT expires).
c. Transitioning from operating mode 'Off' to operating mode 'Heating', 'Cooling', or 'Auto' (after MCOT expires).
Refer to Figure 11 below, the system will start after both MCOT and RVD have expired.
Figure 11: The Heat Pump Starts Heating/Cooling Only After Reversing Valve Delay Expires
Reversing Valve Delay
Call input for reversing valve
Call input for compressor
O/B - Reversing valve signal out
Y - Compressor signal out
1
Included with SMC55-HWQS version 7420 or newer, SMC55-RESI version 7302 or newer and HomeWorks Palladiom Thermostat version 1.10 or newer.
1
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1
Cooling energized
Call for Stage 2 cooling
Upstage 2nd cool
stage delay = 2 min.
FODC
OCFT
1
Call for compressor
MCOT started
MCOT (5 min.)
(continued)
1
FODC
OCFT
1
MCOT started
RVD started
Reversing
MCOT (5 min.)
Valve Delay
25
(continued)
Call for compressor
P/N 032498h