2. GENERAL
NG-LF series fully automatic gas-fired warm air
heaters (WAH) for stable heating and other
agricultural
and
commercial
equipped
with
infrared
electrical ignition, supported air fans and open
combustion
chamber
exhaust gas system.
3. SAFETY FEATURES
The WAH is equipped with a safety temperature
controller (STC) as a safety feature to prevent
overheating
The STC shuts down the WAH upon exceeding
the defined temperature.
The integrated restart lock prevents restarting of
the WAH.
After cooling the WAH, the cause must be
eliminated and the STC must be manually
released. The reset button is located on the
control box under the black screw cap (Item 8).
Then press the release button for the automatic
gas-firing device on the front panel of the
switching box (Item 9).
The built-in infrared flicker detector serves as a
flame-monitoring device and is connected to the
automatic gas firing unit that controls and
monitors the overall function of the WAH.
4. INSTALLATION/ ASSEMBLY
In order to prevent personal injury and
property damage, the relevant local building,
fire-prevention
organizational
regulations
unconditionally observed.
Before setting up it must be ensured that the
local supply conditions (gas type, pressure)
and the current setting of the WAH
correspond.
The WAH may be operated only in well-ventilated
spaces and must not be used in residential or
similar premises.
To comply with the MAC limit values at the set-up
location, for each KW of device output a fresh air
exchange rate of at least 25 m
ensured.
applications
flame
monitoring,
for
operation
without
and
professional
must
3
/h must be
Operation in environments at risk of fire or
explosion is prohibited.
The WAH is freely horizontally suspended in the
room using suitable chains connected to the
three plus-flush brackets provided for this
-
purpose.
The distance from combustible parts must be at
least 1.5 m ; on the outlet side of the device at
least 3 m.
Any attachment of pipes, hoses or the like as well
as changes to the cross-section is prohibited on
the inlet and outlet side.
Caution!!!
WAH electrical and gas hookups must be
done only by a specialist and in accordance
with local standards.
Electrical Connection
The electrical connection is made using a built-in
power cable with three-wire grounded plug to a
230 V / 50 Hz a.c. power line.
Gas Hook-up
The WAH is factory-equipped with a 1.5 m long
gas
hose,
corresponding
combination
connection to the gas lines must be made using
appropriate connectors (note left-hand thread).
Since there may be regional differences in gas
composition, proper igniting must be checked on
site at the time of initial operation.
In the event of imperfect ignition, the position of
the ignition electrode must be adapted.
be
These inspections should be repeated at regular
intervals.
Triggering Possibilities:
1. Connection via room thermostat
The thermostat line is connected directly on
the terminal bar in the switching box (see the
wiring diagram for connections).
2. Connection using floating contact of the fan
control or the fan computer (see the wiring
diagram for connections).
3. Connection via mains socket that is
appropriately wired.
- 13 -
hose
break
prevention
pressure
regulator
bottle
connection
and
a
with
thread.
The