Trane Tracer VV550 User Manual

104 CNT-SVX17G-EN
Appendix D: Reheat Actuation Schedule Tables
On/Off hot water 
(1 stage)
On/Off hot water 
(1 stage) priority
Remote thermostatic
On: Zt < HSP
Off: Zt  HSP +
0.5°F
Local thermostatic
On: Zt < HSP – 1°F
Off: Zt  HSP
– 0.5°F
Not applicable
Each stage represents an equal percentage of total capacity.
T
otal capacity is limited by communicated auxiliary heat enable.
Not applicable
On/Off hot water 
(1 stage)
Modulating hot
wa
ter priority
Remote PI capacity loop
Remote modulating calve capacity = 1/2 total capacity
Remote valve controls total capacity from 0% to 50%
Valve drive incrementally open/closed
Local capacity
Local On/Off valve capacity =
1/2 total
capacity
On: total capacity > 100%
Off: total capacity  50%
Total capacity is limited by communicated auxiliary heat enable.
Modulating hot
wa
ter
On/Off hot water 
(1 stage) priority
Remote capacity or
thermos
tatic
Remote On/Off valve capacity
= 1/2 total
capacity
On: total capacity > 50% or Zt
< HSP
– 0.5°F
Off: total capacity  0
% o r Z t 
HSP + 0.5°F
Local PI capacity loop
Local modulating valve capacity = 1/2 total capacity
Local valve controls total capacity from 51% to 100%
Valve drive incrementally open/closed
Total capacity is limited by communicated auxiliary heat enable.
Abbreviations: Zt = Zone temperature; HSP = Heating setpoint
Table 68. Local and remote heat with remote priority and no fan present
Configuration Method of control
Local Remote Stage 1 Stage 2 Stage 3

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English