Installation Instructions

Document No. 540-208
Installation Instructions
July 15, 2009
CAUTION:
The controller’s DOs control 24 Vac
loads only. The maximum rating is 12
VA for each DO. Use an interposing 24
Vac relay module ([550-054, 550-048,
550-050, 550-052]) for any of the following:
• VA requirements higher than maximum
• DC power
• Separate transformers used to
power the load
— VA requirements higher than maximum
— 110 or 220 Vac
— DC power
— Separate transformers used
to power the load
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+-
CH
S
Y1 G
Y2
COM
CW
CCW
- OR - (COLD DUCT)
DAMPER
ACTUATOR
G = COMMON
DAMPER
ACTUATOR
ROOM TEMPERATURE SENSOR
SPARE AI (100K THERMISTOR ONLY); OR,
SPARE DI (DRY CONTACT CLOSURE ONLY)
WALL SWITCH (OPTIONAL); OR,
SPARE DI (DRY CONTACT CLOSURE ONLY)
AVS 2 AUTOZERO MODULE (OPTIONAL); OR,
SPARE DO
Y1 G
Y2
COM
CW
CCW
- OR - (HOT DUCT)
DAMPER
ACTUATOR
G = COMMON
DAMPER
ACTUATOR
ELECTRIC HEAT STAGE 2 (OPTIONAL); OR, SPARE DO
AVS 1 AUTOZERO MODULE OR ELECTRIC HEAT
STAGE 3 (OPTIONAL); OR, SPARE DO
TEC2237-2268EHWDR3
ELECTRIC HEAT STAGE 1 (OPTIONAL); OR, SPARE DO
24 V-AC
TX
RX
FLN
TRUNK
+ - S
BST
RTS
DO 1
NO C
DO 2
NO C
DO 3
NO C
DO 4
NO C
DO 5
NO C
DO 6
NO C
DI 3
AI 3
DI 2
DO 7
NO C
DO 8
NO C
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
C H
Figure 8. Point Wiring for Applications 2237, 2238, 2267, 2268, 37, 38, 67, and 68 with Electric Reheat.
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