17
RSM-DEV1 Technical Guide
SEQUENCE OF OPERATIONS
Staging
Stage 1 to 4 (A1 is on; B1 stages on; A2 and B2 are off)
• A1 was at maximum speed.
• Stage delay has been met.
• Controlling temperature is above the staging window for
cooling or below the staging window for heating.
• A1 resets to recommended start speed (3,600 RPM
Copeland; 3,000 RPM Danfoss).
Stage 4 to 5 (A1 and B1 are on; A2 stages on; B2 is off)
• A1 was at maximum speed.
• Stage delay has been met.
• Controlling temperature is above the staging window for
cooling or below the staging window for heating.
• A1 resets to recommended start speed (3,600 RPM
Copeland; 3,000 RPM Danfoss).
Stage 5 to 7 (A1, A2, and B1 are on; B2 stages on)
• A1 was at maximum speed.
• Stage delay has been met.
• Controlling temperature is above the staging window for
cooling or below the staging window for heating.
• A1 resets to recommended start speed (3,600 RPM
Copeland; 3,000 RPM Danfoss).
Stage 7 to 5 (A1, A2, and B1 are on; B2 stages off)
• A1 was at minimum speed.
• Stage delay has been met.
• Controlling temperature is below the staging window for
cooling or above the staging window for heating.
• A1 resets to recommended start speed (3,600 RPM
Copeland; 3,000 RPM Danfoss).
Stage 5 to 4 (A1 and B1 are on; A2 stages off; B2 is off)
• A1 was at minimum speed.
• Stage delay has been met.
• Controlling temperature is below the staging window for
cooling or above the staging window for heating.
• A1 resets to recommended start speed (3,600 RPM
Copeland; 3,000 RPM Danfoss).
Stage 4 to 1 (A1 is on; B1 stages off; A2 and B2 are off)
• A1 was at minimum speed.
• Controlling temperature is below the staging window for
cooling or above the staging window for heating.
• A1 resets at recommended start speed (3,600 RPM
Copeland; 3,000 RPM Danfoss).
Stage 1 to 0 (A1 stages off; A2, B1, and B2 are off)
• A1 was at minimum speed.
• A1 minimum run time met.
• Stage delay has been met.
• Controlling temperature is below the staging window for
cooling or above the staging window for heating.
•
If in Dehumidification Mode, A1 is not allowed to stage
off.
Reheat only on second circuit in Dehumidification Mode
Stage 2 (A1, A2, and B2 are off; B1 is on)
• B1 on immediately, no conditions needed.
Stage 2 to 3 (A1 and A2 are off; B1 is on; B2 stages on)
• Stage delay has been met.
• Controlling temperature is above the staging window for
cooling or below the staging window for heating.
• Or, reheat valve at 100% and supply air temperature is at
least two degrees below setpoint.
Stage 3 to 6 (A1 stages on; A2 is off; B1 and B2 are on)
• Stage delay has been met.
• Controlling temperature is above the staging window for
cooling or below the staging window for heating.
Stage 6 to 7 (A1, B1, and B2 are on; A2 stages on)
• Stage delay has been met.
• Controlling temperature is above the staging window for
cooling or below the staging window for heating.
Stage 7 to 6 (A1, B1, and B2 are on; A2 stages off)
• Stage delay has been met.
• Controlling temperature is below the staging window for
cooling or above the staging window for heating.
Stage 6 to 4 (A1 and B1 are on; A2 is off; B2 stages off)
• Stage delay has been met.
• A1 is less than or equal to 50% and reheat valve less
than or equal to 50%.
• A1 resets to recommended start speed (3,600 RPM
Copeland; 3,000 RPM Danfoss).
Stage 6 to 3 (A1 stages off; A2 is off; B1 and B2 are on)
Stage 4 to 3: (A1 and B1 are on; A2 is off; B2 stages on)
• A1 is at minimum speed.
• Controlling temperature is below the staging window for
cooling or above the staging window for heating.
• Stage delay has been met.
