HWH 680 Series Operator's Manual page 21

DETAIL A
WHEN THERE IS NO +12 POWER
TO THE AIR VALVES CONSTANT
AIR PRESSURE IS SUPPLIED TO
THE AIR SEAL FROM THE AIR
SUPPLY.
WHEN +12 IS SUPPLIED TO THE
AIR VALVES, AIR WILL EXHAUST
FROM THE AIR SEAL.
SECTION VIEW: RAIL,SEAL,
AND RETAINER ASSEMBLY
DETAIL A
AIR SEAL CONNECTION
DIAGRAM
CONNECTING
HOSE
AIR SEAL
MANIFOLD
ASSEMBLY
AIR PRESSURE
REGULATOR -
SET AT 15 P.S.I.
DO NOT CHANGE
ALUMINUM RAIL
+12 VOLT
3-WAY AIR VALVE
3-WAY
NOTE: SOME VEHICLES ARE
EQUIPPED WITH A +12 VOLT AIR
COMPRESSOR THAT IS ONLY USED
TO SUPPLY AIR FOR THE AIR SEAL.
AIR SEAL AND
RAIL ASSEMBLY
VACUUM
+12 VOLT NORMALLY
CLOSED AIR VALVE
CHECK VALVE
FROM AIR
SUPPLY
AIR SEAL
SEAL RETAINER
EXPLODED VIEW
MP75.475C
11APR02