0501UCA
9/25
Note : gas tap must be fltted to fall closed
6. GAS CONNECTION
6.1
Connection to a gas service may only be carried
by suitably qualified persons. The gas installation
must comply with the rules in force using
materials appropriate for gas service
installations.
6.2 Check that the gas category is in accordance
with the data described on the air heater.
6.3 An
adequate
gas
supply
sized to provide the
dynamic pressure for the volume required by the
air heater(s) is essential to maintain the nominal
heat input.
6.4 A 90° action gas service tap and, to facilitate
servicing, a disconnect union fitting must be
provided adjacent to the appliance, see figure 7.
6.5 Ensure that a gas service includes a filter and
has been tested and purged in accordance with
prescribed practice prior to commissioning and
taking the air heater into service.
Figure 7 : Gas connection detail
WARNING: NEVER use a FLAME to test for GAS Soundness !!!
7. ELECTRICAL CONNECTION
7.1 The Electrical installation may only be carried
out by suitably qualified persons observing the
rules in force.
7.2 Check
that
the electrical specification is in
accordance with the specified data on the air
heater. A unique appliance wiring diagram is
supplied as a separate document attached to
this one, plus an additional copy is attached to
the air heater.
7.3 These
appliances
must
be earthed.
7.4
A separate lockable electrical isolator for each
heater must be provided within view of and
adjacent to the appliance. The isolator must
have a contact separation of at least 3.0 mm on
all poles.
7.5
Ancillary controls are required to provide timed
heat cycles, room comfort temperature level,
frost protection, override air circulation etc.
These are not included with the appliance and
should be ordered separately.
7.6 Ensure when planning the external appliance
control circuitry, that power will be supplied at all
times to the air heater, even when it is control
switched in the 'heat-off' mode. This is
necessary to ensure that the fan can operate
independent of the heating control. Therefore,
Never
incorporate automatic controls that
electrically isolate the appliance.
NOTE: UCA AIR HEATERS ARE SUPPLIED WITH EXTERNAL CONTROL CIRCUITS BRIDGED. THE
AIR HEATER/S WILL OPERATE CONTINUOUSLY UNLESS THESE ARE REMOVED AND TIME AND
TEMPERATURE CONTROLS SUBSTITUTED FOR THEM
OPEN
