Replacing Heater Element; Double Heat Exchanger - Isotemp Basic Manual De Operación

6:3 Replacing heater element:

Warning! Be sure to turn power off " rst!
Drain the tank from water.
Basic and Slim
Take off the plastic cover, unscrew the two screws at the
sides and push the cover downwards. Dismantle the
thermostat and the overheat protector from their brackets
for better access on the Slim model.
On Basic they can be left in position during the operation.
Pull off the wires from the heating element tabs.
Loosen the centre nut, ! g. 11-A and take off the support, ! g.
11-B. Put on the nut again on the centre bolt for easier
handling, easier to grab by hand.
Push off the mounting " ange and rubber gasket inwards,
it will come out together with the heater element unit. Turn
the heater element unit 90° to the left, the wire tabs shall
point to the right.
Twist the unit until the inner end hits the tank to the left.
Pull out the heater element unit through the hole with the
left side ! rst.
Unscrew the heater element from the mounting " ange.
Mount the new heating element with new seal rings and a
new big rubber gasket in the opposite order to the
B A
description above. The inner end of the heating element
shall point slightly downwards after assembly.
Slim Square
The heating element unit is on the Square model fastened
by six screws on a " ange which is fastened into the tank.
It has a rubber gasket. See ! g. 11
First, pull off the wires from the heating element tabs.
Loosen all six screws, the heating element unit including
the " ange can be pulled out. Note the position of the
" ange.
The heating element is fastened on the " ange with
nuts. Unscrew the heating element from the mounting
" ange. Mount the new heating element with new seal
001021
rings and a new big rubber gasket in the same position
as before.
Fig. 11
7. Double heat exchanger, Basic 40 & 75
litres
.
Double heat exchanger water heaters have connections for
the second heat exchanger located also on the front, side by
side with ordinary heat exchanger connections.
See ! g. 4
Replacement of the heating element is made the same way
as the description above.
9