ESH150
–3PE~400V
Service manual
26/56
Ref. NR-000144-ENG
Proceed to install the transfer pumps (if applicable) paying special attention to connect each
pump to
“its”
respective product, as changing the pumps would cause a reaction in the
products inside them and make them useless. Identifying each pump with a tape of the same
color as that of the hoses (blue for the Polyol pump and red for the Isocyanate pump) might be
a good method for avoiding errors in connection.
Do the following steps to install the pumps:
a) Make sure that the inlet valves of the products to the unit are closed.
b) Connect one end of the Polyol hose (3/4
” thread) to the Polyol valve and the other end
to the transfer pump of the same product.
c) Connect one end of the Isocyanate hose (3/4
” thread) to the Isocyanate valve and the
other end to the transfer pump of the same product.
d) Connect the air hose to the transfer pumps.
e) Install the unit ground connection. The movement of the product inside the hose can
cause static electricity and produce electrical discharges.
Purge method (units with heated hose & transformer)
Before using the unit, the residual air and oil from factory testing must be eliminated. To purge
the whole circuit, proceed as follows:
a) Pressurize the transfer pumps and open the inlet ball valves. Make sure there are no
leaks.
b) Turn the hydraulic pressure regulator counter clockwise.
c) Turn the general switch ON. The top pilot light will come on.
d) Press the CONTROL POWER key.
e) Hold the coupling block with the outlet of each product in separate vessels and open the
manual valves of each product.
f) Press the MOTOR key.
g) Press the NORMAL key. The led will light.
h) If necessary, increase the hydraulic pressure by turning the regulator clockwise until the
product pumps begin to move slowly.
i)
Allow the materials to come out of the coupling block until the residual oil and the air
bubbling has disappeared completely.
j)
Close the manual valves of each product and clean the coupling block of the remains of
product.
k) Slowly increase the hydraulic pressure to check for product leaks in the hose joints.
Retighten if necessary and tape the connectors to protect them from possible damage.
l)
Press the NORMAL key. The led will go out.
m) Place the gun in the coupling block.
