page no. 25 of 28
PZN Aquamatic Water Heater
Doc Ref M107 issue 1.3 Sep 2018.
• Checking the pressure of the system
Regularly check the pressure of the system, so as to
allow the unit to operate in optimal conditions.
Do not exceed the maximum working
pressure limit indicated in chapter TECHNICAL
DATA.
• Clean external panels
This cleaning should only be carried out with damp cloths
with soap and water. For stubborn stains, moisten the
cloth with a mixture of 50% water and 50% denaturated
alcohol or specific products. After cleaning, dry the
surfaces carefully.
Do not use sponges soaked in abrasive
products or powder detergents.
• Clean fan
Remove any dust and/or foreign objects that may have
deposited on the fan and/or grating with compressed air.
• Clean heat exchanger
Remove the air outflow grating. Then clean off any dust
that may have deposited on the exchanger fins with the
aid of compressed air.
WARNING: For heavily used installations,
maintenances should be carried out every 6
months.
• position the main switch to OFF.
• check that the water system drain valve is closed;
• open the manual bleed valves (shown)
• open the system drain valve and drain all the water;
WARNING: Always switch off and disconnect
electricity supply and close the water check
valve before carrying out any servicing work
or replacement of failed components.
NOTE: If a suspended unit is to be serviced do
not lean ladders against the heater.
Ensure that an access tower or equivalent is
used.
Full maintenance should be undertaken not less than once
per year by a qualified person.
No 'specialised 'tools will be required to carry out this
service.
A fault finding guide is given in section 3.1 to aid servicing.
After any servicing work has been complete, or any
component replaced, the air heater(s) must be fully
commissioned and tested for soundness as described in
Section 2.6.
The following checks should be carried out during an
annual maintenance:
• Check for air in circuit
Loosen the manual bleed valves and check that there is
no air.
• Check voltage
Using a voltmeter check that the power supply is as
indicated on the technical data plaque (tolerance ± 10%).
• Check absorption
Using an ammeter check that the electrical current of
each phase is less than that indicated on the technical
data plaque.
• Check electrical connections
Disassemble the electrical connections box and check that
all the terminal grips are tightened properly.
• Check water couplings
Check for leaks along the entire circuit.