46
BAS-SVX084A-EN
Calibration, Operation Modes, and Control
On/Off electric
(1 to 3 stages)
Not applicable
Local thermostatic:
• On: Zt < HSP
• Off: Zt
HSP + 0.5 °F (0.28°C)
Local thermostatic:
• On: Zt <HSP - 1°F (0.56°C)
• Off: Zt
HSP - 0.5°F (0.28°C)
Local thermostatic:
• On: Zt < HSP - 2°F
• Off: Zt
HSP - 1.5°F (16.9°C)
Each stage represents an equal percentage of total capacity. Total capacity is limited by communicated
supply heat control.
On/Off hot
water
(1 stage)
Not applicable
Local thermostatic:
• On: Zt < HSP
• Off: Zt
HSP + 0.5°F (0.28°C)
Not applicable
Not applicable
Total capacity is limited by
communicated supply heat control
Not applicable
Not applicable
Modulating hot
water
Not applicable
• Local PI capacity loop
Modulating valve capacity = Total capacity
Valve drive incrementally open/closed
Total capacity limited by communicated supply heat control
Not applicable
Table 11. Local heat only with no fan present (continued)
Configuration
Method of Control
Local
Remote
Stage 1
Stage2
Stage 3
Table 12. Local heat only with parallel fan present
Configuration
Method of Control
Local
Remote Fan
Stage 1
Stage 2
Stage 3
Fan
Not
applicable
Parallel fan
Not applicable
Not applicable
Not applicable
Fan and PWM
electric (1 to 2
stages)
Not
applicable Parallel fan
• Local PI capacity loop.
• Each stage represents an equal
percentage of total capacity PWM
Output (one stage = 100%; two
stages = 50% each.
• Total capacity is limited by
communicated supply heat control.
• Local PI capacity loop.
• Each stage represents an equal percent of total capacity
• (1 stage = 100%, 2 stages = 50% each).
• PWM output.
Total capacity is limited by communicated supply heat control.
SCR electric
Not
applicable
• Local PI
capacity loop
• SCR heat
capacity =
total
capacity
• Total
capacity
limited by
communicat
ed supply
heat control
Not applicable
Not applicable
SCR electric
Fan and On/Off
electric (1 to 2
stages)
Not
applicable
Parallel fan
Local thermostatic:
• On: Zt < HSP
• Off: Zt
HSP + 0.5 °F (0.28°C)
Local thermostatic:
• On: Zt < HSP - 1°F (0.56°C)
• Off: Zt
HSP - 0.5°F (0.28°C)
Local thermostatic:
• On: Zt < HSP - 2°F (1.11°C)
• Off: Zt
HSP - 1.5°F (0.83°C)
• Each stage represents an equal
percentage of total capacity.
• Total capacity is limited by
communicated supply heat control.
• Each stage represents an equal percentage of total capacity.
• Total capacity is limited by communicated supply heat control.
Fan and On/Off
hot water (1 to 2
stages)
Not
applicable
Parallel fan
Local thermostatic:
• On: Zt < HSP
• Off: Zt
HSP + 0.5°F (0.28°C)
Local thermostatic:
• On: Zt < HSP - 1°F (0.56°C)
• Off: Zt
HSP - 0.5°F (0.28°C)
Not applicable
Total capacity is limited by
communicated supply heat control.
Total capacity is limited by
communicated supply heat
control.
Not applicable
Fan and
Modulating hot
water
Not
applicable
Parallel fan
• Local PI capacity loop.
• Modulating valve capacity = Total
capacity.
• Valve drive incrementally open/
closed.
• Total capacity limited by
communicated supply heat control.
• Local PI capacity loop.
• Modulating valve capacity = Total capacity.
• Valve drive incrementally open/closed.
• Total capacity limited by communicated supply heat control.