dB AM Series, Installation, Operation & Maintenance Instructions Manual

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16
CLEANING AND MAINTENANCE
WARNING:
Prior to undertaking any cleaning or maintenance, ensure that all electrical supplies are disconnected from
the heater via local isolators. Some internal components may have sharp edges. Protective gloves should be
worn.
Inspection
Frequency of cleaning and inspection depend
upon the operating conditions. Initially, it is
suggested that the air filter is inspected after 6-8
weeks and cleaned as required at regular
intervals. Cleaning the air filter ensures that the
heater delivers the required air flow rate and heat
output. The heater should not be operated without
a filter, since the heater coil fins will become
clogged with fluff and dust particles, resulting in
reduced performance.
Filter access and removal
To gain access to the air filter, unlock and remove
the access panel with the special key provided.
Floor, wall and duct models, pull the access panel
at the top and lift clear. Ceiling models, hinge the
access panel down and allow it to hang from the
safety screws (note: access panel can be
removed by removing the safety screws).
Cleaning
1. Air filters can be cleaned by tapping out
excess dust and washing in warm water
(up to 40°C), using detergent if necessary.
The filter must be rinsed and allow to dry
naturally before replacing. Do not use a
vacuum cleaner, as it can damage the filter
media. Filters should be replaced after
approximately 20 washes.
2. Because the air filter retains most of the
dusty particles, it will only be necessary to
clean the fan/motor assemblies and heater
coil annually. An industrial vacuum cleaner
can used to clean the inside of the heater,
in particular the heater coil(or electric
element) and fans, with the air being
sucked through the heater coil in the
opposite direction to normal air flow. All
accessible surfaces can be wiped with a
dry cloth.
Maintenance
1.
Coil
- Purge any air from the coil using the
manual air vent (using a suitable key) or by
turning the knurled thumbwheel on the
automatic air vent if fitted. Automatic air
vents have a built-in check valve which
allows the head to be removed without
draining the system.
2.
Motors
- The fan motor has ‘sealed for life’
bearings which do not require any
maintenance, other than visual inspection.
3.
Fuse
- The mains inlet connector on the
electrical connections box incorporates a
2A anti-surge fuse. A spare fuse is
supplied in a slide out fuse holder next to
the socket.
4.
Controls
- see accessories . A wiring
diagram is supplied with each heater.
Further copies are available on request,
please quote the serial number from the
nameplate, located inside the heater.
Please note :
1. If fitted, the LTC thermostat will switch
power to the fan only when the thermostat
reaches the required temperature. For a
type 1 (fixed setting) approx. 50°C ± 3K or
for type 2 (adjustable setting) 30-90°C (the
recommended setting is 20K less than the
mean water temperature)
2. If air thermostats are fitted (either to the
heater or remote mounted on a wall),
adjust to the specified temperatures.
Typical settings are:
a) on/off thermostat - set to 20°C
b) high/low thermostat - set to 16°C.
3. If fitted or remote switches are being used,
check that they operate correctly. Note : if
manual/off/auto switch is provided, all
thermostats are by-passed in the manual
position, which allows the fans to circulate
room air when the boiler plant is shutdown.
SPARES/SERVICE
PLEASE WRITE THE DETAILS OF THE UNIT HERE.
These details will be required when ordering spares for you Dunham-Bush Series AM Fan Convector.
UNIT TYPE AND MODEL INFORMATION
SERIAL NUMBER
DATE OF INSTALLATION
Spare parts/service
– Please contact our office, contact information shown below.
Manufacturer reserves the right to change any product specification without notice.