Rapid 2005, Инструкция по установке, эксплуатации и обслуживанию

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SECTION 17: E
LECTRICAL
99 of 147
17. 8 .3 MUA / Exhaust Failsafe Interlock
This option incorporates the lo w temperat u re limit
w ith o v erride timer and an exha u st fan airflo w s w itch
monitor. The exha u st fan airflo w s w itch is field
pro v ided and field w ired as per the option sheet
s u pplied w ith the u nit. When the air handler is t u rned
on there is a 5 min u te establishing period for the lo w
temperat u re limit s w itch and the exha u st fan
interlock. If the air handler’s discharge temperat u re
falls to the predetermined lo w temperat u re limit
setpoint, after the 5 min u te establishing period, the
air handler fan w ill be t u rned off. If there is a fail u re of
the exha u st fan to acti v ate the field s u pplied airflo w
s w itch, after the 5 min u te establishing period, the air
handler fan w ill be t u rned off. To reset the
MUA/exha u st failsafe interlock, set the fan s w itch to
off and then on again. The air handler w ill ret u rn to
the normal seq u ence of operations.
3C
AFS-3
TD5
TIMING RELAY
TD5
21
3D
CR3
CR3
LOW PRESSURE
SWITCH 0.3 in. w.c.
20
CONTROL RELAY
AIR FLOW SWITCH
2
3B
LIMIT
TAS-3
LOW TEMP
TIMING RELAY TD6
TD6
3A
SET AT 5 MIN
SET AT 5 MIN
AIR FLOW SWITCH
EXHAUST FAN
RED YELLOW
-AFS-3: FIELD LOCATE ON EXHAUST FAN, SWITCH PROVIDIED BY OTHERS
-LOW TEMP LIMIT LOCATED AT DISCHARGE SIDE OF BLOWER
-TO TEST: SET DIAL TO MIN TEMP UNIT OPERATES
SET DIAL TO MAX TEMP UNIT SHUTS DOWN
NOTE: -LOW PRES. SWITCH (BETWEEN WIRES 1 AND 20) REPLACES
LOW PRES. SWITCH (BETWEEN WIRES 8 AND 8A)
-CR3 RELAY NORMALLY OPEN CONTACTS REPLACE LOW PRESSURE SWITCH
ON MAIN WIRING DIAGRAM (BETWEEN WIRES 8 AND 8A)
25A
25
CLOGGED FILTER WIRING FOR SDC (80010) AND DTC (80000)
REMOTE PANELS
CR4
CR4
2
CR3
8 8A
REPLACES LOW PRESSURE
SWITCH ON MAIN WIRING
1
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DIAGRAM
FIELD WIRED BY OTHERS
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Part Number Description Models
01004 MUA/Exha u st Failsafe Inlock All Models