Trane Tracer UC400 Installation, Operation And Maintenance Manual page 21

Figure 4. 2–Position and Modulating Valve
1
BAS-SVX48H-EN
Ground
24 Vac
IM C
24 24 24
VAC VAC VAC
XFRM
AO1 AO2
UI 1
BI 4 BI 5
Analog
Heat Valve
Cooling or
(Hydronic
Changeover
or Steam)
Valve
Analog/Heat/Cool Terminal Connections
IM C
24
Two-Tier
VAC
XFRM
Terminal
AO1
Connections
BI 4
1
ADDRESS
Single-Tier
Terminal
BO1
NO NC C
Connections
T T y y p p i i c c a a l l A A p p p p l l i i c c a a t t i i o o n n s s a a n n d d T T e e r r m m i i n n a a t t i i o o n n s s
BI 1 BI 2 BI 3
UI 2 AI 1 AI 2 AI 3
24 24
VAC VAC
BI 1 BI 2 BI 3
AO2
UI 1 UI 2 AI 1 AI 2 AI 3
BI 5
BO1 BO2 BO3 BO4 BO5 BO6 BO7 BO8 BO9
CONNECT AC POWER TO THE TRAIC SUPPLY TO POWER THE TRIACS
RELAYS TRIAC SUPPLY
BO2 BO3
NO NC C NO NC C A B
BO4
2-Position Cooling, Changeover, Heating Valve Terminal Connections
CONNECT AC POWER TO THE TRAIC SUPPLY TO POWER THE TRIACS
TRIAC SUPPLY
A B
Ground
To 24 Vac
Modulating Valve Terminal Connections
CONNECT AC POWER TO THE TRAIC SUPPLY TO POWER THE TRIACS
TRIAC SUPPLY
A B
Ground
To 24 Vac
+ 24
VDC
LINK IMC
AI 4 AI 5
P 1 P 2
IM C
+ 24
VDC
LINK IMC
AI 4 AI 5
P 1 P 2
LINK IMC
TX
RX
SERVI C E
SERVICE TOOL
TRIACS
B A
BO5 BO6 BO7 BO8 BO9
TRIACS
BO4 BO5 BO6 BO7 BO8
Cooling or Heating Valve
Changeover Valve (Hyd or Steam)
TRIACS
BO4 BO5 BO6 BO7 BO8
Cooling or Heating Valve
Changeover Valve (Hyd or Steam)
IM C
B A
BO9
B A
BO9
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