PENSOTTI PCI 18, Instruction Manual

Page: 62 / 70

INSTALLATION INSTRUCTIONS
58
D.H.W heat exchanger (see fig. 1)
Close the shut-off valve and drain the domestic
hot water circuit and central heating circuit of the
boiler.
Use a 4 mm Allen key to unscrew the four screws
securing the heat exchanger to the multiplex unit.
Remove the heat exchanger from the left side of
the boiler, note its orientation.
Fit new rubber washer, inserting them in their
housings on the multiplex unit.
Replace the heat exchanger and re-assemble the
components following the above procedure in
reverse order.
Switch on the electricity, water and gas supplies,
fill the system with water and check for any leaks
from the joints.
Storage Cylinder (see fig. 2)
Close the shut-off valves and drain the
central heating circuit of the boiler;
Use a 30 mm key to unscrew the
heating flow and return pipes (fig. 2
–
pos. A);
Use a 24 mm key to unscrew the
D.H.W flow and return pipes (fig. 2 -
pos.B);
Lift the storage cylinder by releasing it
from the boiler frame (fig. 2 - pos.C);
Remove the storage cylinder by
shifting it on the right side (fig. 2 -
pos.C);
Replace the storage cylinder and re-
assemble the components following
the above procedure in reverse order;
Switch on the electricity, water and
gas supplies and fill the system with
water. Check for any leaks from the
joints and bleed off any air from the
circuit
Fig. 2
d.h.w. flow pipe
h.t.g. flow pipe
cylinder top hook
d.h.w heat
exchanger
fixing
screws