Maxton UC1A - Page 40

1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com

40
\\SERVER\CATALOG2019\2019CatalogRev2

A
BPS
R
DL
D
B
COIL
COVER
SYSTEM
PRESSURE
(JACK)
“B” PORT
SERIAL #
Front View
PUMP
PRESSURE
“A” PORT
LOW
PRESSURE
SWITCH
“S” PORT
SERIAL #
SOLENOIDS
(UNDER)
COVER
US D
U
DL
*UP STRAINER
*DOWN STRAINER
Top View
UC4
UC4M
Front View
PUMP
PRESSURE
“A” PORT
COIL
COVER
DL
D
B
A
BPS
R
SYSTEM
PRESSURE
(JACK)
“B” PORT
SERIAL #
US
D
DL
U
O
*DOWN STRAINER
*UP STRAINER
SOLENOIDS
(UNDER)
COVER
Top View
LOW
PRESSURE
SWITCH
“S” PORT
ATTENTION: All Maxton Valves MUST be installed with the solenoids in the upright (vertical) position.
When replacing a Maxton UC3 / UC3AM or UC4 / UC4M series valve, the pump flange assembly
must also be replaced. It is subject to the same wear and tear as the valve.
*Strainer access is provided from the top of the control plate.
Prior to 2012 the sleeve and baseplate were an integral part of coil operation.
2012 to current the C-Frame is an integral part of coil operation.

COIL OPERATING SEQUENCE
US For up travel, energize when pump starts and de-energize to stop. With US
energized and pump running, car will move up at leveling speed. For “soft stop”,
pump should run ½ second after US de-energizes.
U Energize with US coil to run up at contract speed. De-energize at slowdown
distance from floor. Slowdown distance = 2 inches for each 10 fpm of car
speed NOT to exceed 6 inches for every 25 fpm of car speed.
If necessary increase slowdown distance to achieve 4-6 inches
of stabilized up leveling.
DL Energize to move car at leveling speed. De-energize to stop.
D Energize with DL coil to run down at contract speed. De-energize at slowdown
distance from floor. Slowdown distance = 2 inches for each 10 fpm NOT to exceed
6 inches for every 25 fpm of car speed.
If necessary increase slowdown distance to achieve 4-6 inches of stabilized
down leveling.
CAUTION: On Wye - Delta Up Start do not energize U and US Coils until motor is running on Delta.
With soft starter, energize US coil with motor up to speed signal.
ELECTRO-MAGNETIC COILS
U = UP COIL D = DOWN COIL
US = UP STOP COIL DL = DOWN LEVEL COIL
US
D
ADJUSTMENT PROCEDURE UC4, UC4M B44
J
T
J
T
SERIAL #
LS ADJUSTER
LS ADJUSTER