BAS-SVX62E-EN
41
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 9.
Local Heat Only With No Fan Present
Configuration
Method of Control
Local
Remote
Stage 1
Stage2
Stage 3
Table 10. 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
communica
ted 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.