Trane Tracer VV550 User Manual

Table 67. Local and remote heat with local priority and no fan present
Configuration Method of control
Local Remote Stage 1 Stage 2 Stage 3
PWM electric 
(1 to 2 stages)
priority
On/Off electric 
(1 stage)
Local PI capacity loop
Local heat capacity = 1/2 or 2/3 of total capacity
Local heat controls total capacity from 0% to 50% or 0% to 67%
PWM Output
R
emote capacity
Remote heat capacity = 1/2 or
1/3 of to
tal capacit
y
On: total capacity  10
0%
Off: t
otal capacity  50% (or
67%
)
Total capacity is limited by communicated auxiliary heat enable.
On/Off electric 
(1 to 2 stages)
priority
On/Off electric 
(1 stage)
Local thermostatic
On: Zt < HSP
Off: Zt  HSP + 0.5°F
L
ocal thermostatic
On: Zt < HSP – 1°F
Off: Zt  HSP – 0.5°F
Remote thermostatic
On: Zt < HSP – 2°F
Off: Zt  HSP – 1.5°F
Each stage represents an equal percentage of total capac
ity. Total capacity is limited by
communicated auxiliary heat enable.
On/Off hot water 
(1 stage) priority
On/Off hot water 
(1 stage)
Local thermostatic
On: Zt < HSP
Off: Zt  HSP + 0.5°F
R
emote thermostatic
On: Zt < HSP – 1°F
Off: Zt  HSP – 0.5°F
Not applicable
Each stage represents an equal percentage of total capacity.
To
tal capacity is limited by communicated auxiliary heat enable.
Not applicable
On/Off hot water 
(1 stage) priority
Modulating hot
wat
er
Local capacity or thermostatic
Local On/Off valve capacity =
1/2 tot
al capacit
y
On: total capacity > 50% or Zt
< HSP – 0.5°F
Off:
total capacity  0 %
o r Z t 
HSP + 0.5°F
Remote PI capacity loop
Remote modulating calve capacity = 1/2 total capacity
Remote valve controls total capacity from 51% to 100%
Valve drive incrementally open/closed
Total capacity is limited by communicated auxiliary heat enable.
Modulating hot
wa
t
er
priority
On/Off hot water 
(1 stage)
Local PI capacity loop
Local modulating valve capacity = 1/2 total capacity
Local valve controls total capacity from 0% to 50%
Valve drive incrementally open/closed
Remote capacity
Remote On/Off valve capacity
= 1/2 total c
apaci
ty
On: total capacity > 100%
Off: total capacity  50%
Total capacity is limited by communicated auxiliary heat enable.
CNT-SVX17G-EN 103
Appendix D: Reheat Actuation Schedule Tables
Note: This remote stage is On, Zt < HSP – 1°F / Off, Zt  HSP – 0.5°F if only one stage of local heat is present.
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
PWM electric 
(1 to 2 stages)
On/Off electric 
(1 stage) priority
Remote capacity or
thermos
tatic
R
emote heat capacity = 1/2 or
1/3 of total capaci
ty
On: total capacity  50%
(o
r
33%) or Zt < HSP – 0.5°F
Off: total capacity  0 %
o r Z t 
HSP + 0.5°F
Local PI capacity loop
Local heat capacity = 1/2 or 2/3 of total capacity
Local heat controls total capacity from 51% to 100% or 34% to
100% PWM Out
put
Total capacity is limited by communicated auxiliary heat enable.
On/Off electric 
(1 to 2 stages)
On/Off electric 
(1 stage) priority
Remote thermostatic
On: Zt < HSP
Off: Zt  HSP +
0.5°F
L
ocal thermostatic
On: Zt < HSP – 1°F
Off: Zt  HSP
– 0.5°F
Local thermostatic
On: Zt < HSP – 2°F
Off: Zt  HSP
– 1.5°F
Each stage represents an equal percentage of total capac
ity. Total capacity is limited by
communicated auxiliary heat enable.

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English