Weather-Rite XT112 Installation, Operation & Service Manual - Warning
S
ERIES
XT I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
60
FIGURE 31: Burn Hazard
8.
The space serviced by the Process Heater,
during the bake cycle mode must have its light-
ing turned off. If not supplied by the process
heater, then the installer must electrically inter-
lock the facility lights with the bake cycle.
9.
Process Heaters in the baking cycle mode
require a minimum of 200 CFM of ventilation
air per 1000 CFH of fuel gas for proper com-
bustion. If the Process Heater does not come
equipped with the features to meet this require-
ment, then the installer must provide the
method to accomplish it.
NOTE: Process Heaters supplied by Rapid
Engineering LLC are available with the options
required to satisfy this requirement.
A. Reduced Airflow Process Heaters
• Variable Frequency Drive control of the Process
Heater's airflow.
B. 90/10 Recirculation Process Heaters
• The installer must ensure that the Outside Air
Damper, when supplied by Rapid Engineering
LLC, is set to provide proper airflow for
combustion and to make sure the recirculation air
is properly diluted during the bake cycle mode.
This is accomplished by ensuring the bypass
feature of the ventilating air damper is not blocked
by the installation or that the minimum position
control of the ventilating air damper is functioning
properly.
19.3 Installer's Responsibility for Process
Heaters Connected to Paint Booths
1.
If the exhaust control system is not supplied by
the Process Heater, then the installer must
electrically interlock the exhaust system with
the heater.
2.
If a purge cycle between ventilation cycle mode
and the bake cycle mode is not supplied with
the Process Heater, then the installer must
supply a purge timer that delays the bake cycle
from operating for a minimum of 3 minutes or
at least 4 air changes of the space.
3.
The space serviced by the Process Heater,
during the purging cycle and bake cycle mode
must have all spray equipment turned off. If not
supplied by the Process Heater, then the
installer must electrically interlock the spray
equipment with the Process Heater.
WARNING
Burn Hazard
Allow equipment to cool before service.
Internal components of equipment may still
be hot after operation.
Failure to follow these instructions can result
in injury.