page no. 24 oF 28
PZN Aquamatic Water Heater
Doc Ref M107 issue 1.3 Sep 2018.
Checks to ensure electrical safety must be carried out by
a qualified person.
Activating the heating function
• Switch on the electrical supply at the isolator.
• Position the main switch to ON.
• Set fan speed as desired (where speed selector
switch is installed).
• Set room thermostat to desired temperature (higher
than current room temperature).
• At this point both the water circulator and the
heater fan start simultaneously. To prevent an initial
outflow of unpleasant cold air it is possible to delay
fan start-up with the aid of a minimum thermostat
(not supplied as accessory). This thermostat also
delays fan shutdown so as to disperse all the heat
accumulated in the exchanger into the room/area to
be heated.
• Once the temperature set on the room thermostat
has been reached the heater will shut down. When
the temperature drops back down below this setting
the fan heater restarts automatically.
Deactivating the heating function
• Deactivate the fan heater by acting on the room
thermostat;
• Turn the main switch to OFF.
• Close the water check valves.
WARNING: If there is a risk of sub-zero
temperatures and the system water does not
contain an anti-freeze liquid you must drain
the system.
Once the fan heater has been started check that it shuts
down on reaching the required temperature and then
restarts again when the room cools down (adjust the
room thermostat settings if necessary).
With the fan heater running:
• Check that the fan(s) rotates the right way.
• Check that fan(s) operates at the various speeds
(where fan speed control switch is installed).
• Check that electrical absorption is less than indicated
in the Technical Specification section.
• Check that there are no water leaks.
• Check that the fins are not too close together and
that there is no obstruction to airflow.
• If the fan heater passes all these checks it may be
restarted.
OUTPUT
INPUT
1. Helical fan(s)
2. Water-air exchanger
3. Manual air bleed
4. Spherical check valve (not supplied)
WARNING:
Install a drain valve at the lowest
point in the water circuit to empty the system
when necessary.
