Frico pa3520a [33/36] Pa3500 4200

Frico pa3520a [33/36] Pa3500 4200
PA3500/4200
33
GB
Connecting the water coil (W)
The installation must be carried out by an
authorised installer.
The water coil has copper tubes with
aluminium fins and is suitable for connection
to a closed water heating system. The heating
coil must not be connected to a mains
pressure water system or an open water
system.
Note that the unit shall be preceded by a
regulating valve, see Frico valve kit.
The water coil is connected on top of
the unit (horizontal mounting) or on the
reverse (vertical mounting) via connections
DN20 (3/4’’), external thread. Flexible hoses
available as an accessory, see accessories
pages.
The connections to the heating coil must
be equipped with shut off valves (included
in Frico valve kits) to allow problem free
removal.
A vent valve should be connected at a high
point in the pipe system. Air valves are not
included. When units are vertically mounted
with water connection at the bottom venting
of the battery is not possible, make sure the
water heater is filled with water and no air
remains, prior to startup.
Adjustment of the air curtain and air flow
The direction and speed of the air flow should
be adjusted considering the load on the
opening. Pressure forces affect the air stream
and make it bend inwards into the premises
(when the premises are heated and the
outdoor air is cold).
The air stream should therefore be directed
outwards to withstand the load. Generally
speaking, the higher the load, the greater the
angle that is needed.
Basic setting fan speed
The fan speed when the door is open is set
using the speed control. Note that the air flow
direction and speed may need fine adjustment
depending on the loading of the door.
Filter (W)
The water coil is protected against dirt and
blockage by an air filter which covers the
coil face. In environments where the filter
needs cleaning often, it is advisable to use an
external intake filter (see accessories pages),
which provides an easier maintenance, since
the unit does not need to be opened.
Service, repairs and maintenance
For all service, repair and maintenance first
carry out the following:
1. Disconnect the power supply.
2. Loosen the screws and raise the front
panel. The front is blocked in open
position with the front hatch hook, see fig
1A or removed completely, see fig. 1B. The
service hatch is removed by loosening the
screws.
3. After service, repairs and maintenance
fasten the service hatch and the front.
When the front has been removed it it
important to be sure it is firmly seated in
the front locks again, see fig. 1B.
Maintenance
Unit with water heating:
The appliance filter should be cleaned
regularly to ensure the air curtain effect and
the heat emission from the device. How often
depends on local circumstances. A clogged
filter is not a risk, but the appliance function
can fail.
1. Disconnect the power.
2. Loosen the screws and raise the front
panel. The front is blocked in open
position with the front hatch hook, see fig
1A.
3. Remove the filter and vacuum clean or
wash it. If the filter is clogged or damaged,
it may need to be changed.
All units:
Since fan motors and other components are
maintenance free, no maintenance other than
cleaning is necessary. The level of cleaning
can vary depending on local conditions.
Undertake cleaning at least twice a year. Inlet
and exhaust grilles, impeller and elements
can be vacuum cleaned or wiped using a
damp cloth. Use a brush when vacuuming
to prevent damaging sensitive parts. Avoid
the use of strong alkaline or acidic cleaning
agents.

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