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23
Appendix H (cont’d)
WIRING DIAGRAMS
(Exhaust)
M1
Ventilation Fan Motors
M2
(Supply)
J1
J2
J3
J4
JU1
Low Speed
Relay
K1 K2
K3
High Speed
Relay
Recirculation
Relay
F1
F2
X1
K4
K5
Damper
Relay
Unocuppied
Relay
ITEM
DESCRIPTION
K1
Relay DPST 120 VAC, 1 HP, 30 A @ 120 VAC
K2
K3
K4
Relay DPDT 24 VAC, 1/2 HP, 15 A @ 120 VAC
K5
Relay SPDT 120 VAC, 1 HP, 30 A @ 120 VAC
F1
Fuse
5 A fast acting and fuse holder
F2
Fuse 0.25 A fast acting and fuse holder
X1
24 VAC Transformer 40 VA
UCB1
Electronic Controller
10K Defrost
Thermistor
Remote Electrical
Enclosure
Main Electrical
Enclosure
UCB1
SYSTEM DIAGRAM
ITEM
C
JU1
OFF
B OFF
A OFF
D ON
E ON
F ON
G ON
POSITION SETTING
From/To
J3-9
J3-1
J3-8
J3-9
J3-6
J3-7
J3-8
J3-8
J3-2
J3-8
J3-9
GREEN
YELLOW
LOW
COM
HIGH
BLACK
RED
OCC.
UNOCC.
REM FAN
INTERLOC
stop
987654321
FF IOCOLYR GB
VE0470A
B6LC, B12LC - Recirculation Defrost - Normal Low Speed
Ref: 1107007_REV-A
Relay SPDT 120 VAC, 1 HP, 30 A @ 120 VAC
123
456
9 78
3.9K
WARNING
• Risk of electric shocks. Before performing any maintenance or servicing, always disconnect the unit from its power source.
• This product is equipped with an overload protection (fuse). A blown fuse indicates an overload or a short-circuit situation.
If the fuse blows, disconnect the unit from its power source. Discontinue using the unit and contact technical support.
!
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