MAINTENANCE
•
The furnace can now be used again.
5.5 Heat
Exchanger
If the heat exchanger is leaking or clogged, replace it by a new one. Check monthly if all fans
are running smoothly. If one fan is out of order, it can be replaced at the next convenient
moment.
Replacement must be done in the following order
:
•
Turn off the power of the entire system.
•
Shut off the cooling water.
•
Remove the cooling water out of the coolings.
•
Unscrew the fastening screws.
•
Move away the fanplate.
•
Disconnect the connector of the fans.
•
Replace the fanplate by a new one.
When replacing a fanplate, beware of the 'Swagelock' tube fittings. These have to be
re-tightened as follows:
•
The connections can be disconnected and re-tightened many times. The same
reliable, leak-proof seal can be obtained every time the connection is remade.
•
Tighten the nut by hand.
•
Rotate the nut to the original position with a wrench (An increase in resistance will
be encountered at the original position).
•
Then tighten slightly with the wrench. The original position will generally be about
1/4 turn for 1/4' to 1/2' tubing (Smaller tube sizes will takes less tightening to reach
the original position, while larger tube sizes will require more tightening. The wall
thickness will also have an effect on tightening).
F
URNACE
R
EFERENCE
M
ANUAL
5-4
