Reheat Actuation Schedule With No Fan Present - Trane Tracer VV550 Installation, Operation And Maintenance Manual

Appendix D: Reheat Actuation Schedule Tables

Reheat Actuation Schedule With No Fan Present

The reheat actuation operation with no fan present is described in the following tables:
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Table 65. Local heat only with no fan present
Configuration
Local Remote
PWM electric 
Not applicable
(1 to 3 stages)
On/Off electric 
Not applicable
(1 to 3 stages)
ON/Off hot water
Not applicable
(1 stage)
Modulating hot
Not applicable
water
Abbreviations: Zt = Zone temperature; HSP = Heating setpoint
Table 66. Remote heat only with no fan present
Configuration
Local Remote
On/Off electric 
Not applicable
(1 stage)
ON/Off hot water
Not applicable
(1 stage)
Modulating hot
Not applicable
water
Abbreviations: Zt = Zone temperature; HSP = Heating setpoint
102
Table 65; Local heat only with no fan present
Table 66; Remote heat only with no fan present
Table 67; Local and remote heat with local priority and no fan present
Table 68; Local and remote heat with remote priority and no fan present
Method of control
Stage 1
Local PI capacity loop
Each stage represents an equal percentage of total capacity PWM Output (one stage = 100%; two
stages = 50% each; three stages = 33.33% each). Total capacity is limited by communicated
auxiliary heat enable.
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 auxiliary heat enable.
Local thermostatic
On: Zt < HSP
Off: Zt  HSP + 0.5°F (0.28°C)
Total capacity is limited by
communicated auxiliary heat
enable.
Local PI capacity loop
Modulating valve capacity = Total capacity
Valve drive Incrementally open/closed
Total capacity limited by communicated auxiliary heat enable
Method of control
Stage 1
Remote thermostatic
On: Zt < HSP
Off: Zt  HSP + 0.5°F (0.28°C)
Limited by communicated
auxiliary heat enable.
Remote thermostatic
On: Zt < HSP
Off: Zt  HSP + 0.5°F (0.28°C)
Limited by communicated
auxiliary heat enable.
Remote PI capacity loop
Modulating valve capacity = Total capacity
Valve drive Incrementally open/closed
Total capacity limited by communicated auxiliary heat enable
Stage 2
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
Not applicable
Stage 3
Local thermostatic
On: Zt < HSP – 2°F
Off: Zt  HSP – 1.5°F
Not applicable
Not applicable
Not applicable
Stage 3
Not applicable
Not applicable
Not applicable
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