Trane Symbio 210 Installation, Operation And Maintenance Manual page 46

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