Elkhart Brass 299-20XHC-N7/4 Monitor - Manual (Page 3)

Revised 8/20/2010 3 EB98175000_Rev. B
2.0 Electrical control system installation:
2.1 Install control boxes at designated locations and cut out holes in box to attach conduit. All
cable entry knockouts on all NEMA #4X enclosures are provided by others. All NEMA
#7/4 enclosures have N.P.T. female threaded entries provided.
2.2 Install conduit and pull electrical conductors between control boxes and Valve & Pump Box.
Main power source to be connected at Valve & Pump Box, supplied by others. Primary power
source required is: 85-265 VAC, 47-264 Hz., single-phase power. When power is connected,
ACDC power supplies will automatically set at voltage and cycles within range required. All
operating voltages for control system and hydraulic pump is 24-VDC powered through power
supply located in Valve & Pump Box. 15 conductors are required from each valve & pump box
to control box, see electrical drawings for connections.
2.3 Conductor size is determined by length of wire needed between control boxes. Recommended
conductor size is as follows:
0 – 300 foot length use #22 AWG wire (voltage drop = 0.48 maximum)
300 – 500 foot length use #20 AWG wire (voltage drop = 0.52 maximum)
501 – 800 foot length use #18 AWG wire (voltage drop = 0.52 maximum)
801 – 1200 foot length use #16 AWG wire (voltage drop = 0.51 maximum)
1201 – 1800 foot length use #14 AWG wire (voltage drop=0.49 maximum)
1801 – 3000 foot length use #12 AWG wire (voltage drop = 0.51 maximum)
3.0 Energize and adjusting hydraulic system:
(This procedure has been done at factory and should not have to be repeated unless hydraulic system is
opened.)
3.1 Fill reservoir with hydraulic fluid. For best results use automatic transmission fluid ( Dexron III).
Check reservoir fluid after each function is bleed out.
WARNING!! Do not operate hydraulic pump without hydraulic fluid.
3.2
Priming hydraulic pump:
3.2.1 Remove electrical plug from valve solenoid V1B and hydraulic pressure tube between
pump & solenoid valve manifold.
3.2.2 Jog “UP” switch on control panel until hydraulic fluid flows out pressure port of pump.
3.2.3 Reconnect pressure hydraulic tube and valve solenoid electrical plug.
3.3 Bleed air out of system by using the following procedure:
3.3.2 Set pump relief valve pressure to 50 P.S.I., which is as low as possible. Lower monitor
vertical movement to maximum down position and disconnect hydraulic hoses from
vertical actuator ports V1A & VIB. Open port controls at both ends of rotary actuator;
turn screws counterclockwise until it stops. (See illustration 1 for location of port control
valve adjusting screws).
3.3.3 Insert open end of V1B hydraulic hose into clean container, and activate “UP” mode
switch at control box. Hold switch until hydraulic fluid is discharging from hose and
is free of air. Reconnect hydraulic hose to port V1B, increase pump pressure then,
activate “UP” switch until monitor rises to maximum elevation.
3.3.4 Close port controls valves at V1A & V1B actuator ports, turn screws clockwise until
it stops, and then open both screws one complete revolution.
3.3.5
Insert open end of V1A hydraulic hose into clean container, and activate “DOWN”
mode switch at control box. Hold switch until hydraulic fluid is discharging from
hose and is free of air. Reconnect hydraulic hose to port V1A, then activate “DOWN”
switch until monitor is lowered to minimum elevation.