MTS Model 512-14 Hydraulic Power Unit - Manual (Page 14)

512.14 Hydraulic Power Unit 14 Installation
2. Connect the hydraulic lines.
See “Connection Locations (Top View)” on page 13 to determine the
locations of the hydraulic connections to the HPU. The following table lists
the size of each hydraulic connection.
3. Connect the water lines to the heat exchanger.
Note This applies only to the water-cooled version of the HPU.
The HPU requires connection to a suitable water supply, equipped with an
appropriate shutoff valve, to cool the hydraulic fluid. The differential
pressure required between the HPU water inlet and outlet connections is 0.2
MPa (30 psi). The maximum allowable water inlet pressure is 1 MPa (150
psi).
The water supply must be capable of maintaining the water flow rate given
in the table,
“Specifications” on page 10.
See “Connection Locations (Top View)” on page 13 to determine the
locations of the water connections.
4. Connect an external Emergency Stop switch.
An optional Emergency Stop switch can be connected to the 14–pin CPC
connector located on the control box. Before you can use this connector,
remove the jumper from pins 1 and 3 located on the terminal block in the
control box (see
“Electrical Schematic” on page 15).
5. Connect the electrical service to the HPU.
Note Electrical connections must be made by qualified personnel and conform
to local codes and regulations. Local electrical codes supersede any
information found here.
A. Open the control box.
B. Open a knock-out hole.
C. Install a wire grommet.
D. Feed the line through the grommet into the control box.
E. Connect the power source lines (L1–L3) to the terminal blocks
according to the required line voltage. See
“Electrical Schematic” on
page 15.
F. Connect the ground to the lug identified with a sticker showing the
ground symbol.
Connector Size
Pressure, 37º flare -8
Return, 37º flare -8
Drain, 37º flare -6