Conviron PGW40, Руководство оператора

Страница: 21 / 29

Operation
September 10, 2020 | 296742-ENG R00 13
3.12 Chemical Dryer Dehumidification
– (CD Option)
Chamber air is passed over a desiccant to remove moisture. The dry air is re-introduced into the
chamber at very low humidity. Chemical dryers offer the greatest degree of dehumidification.
Refer to the included
Conviron CMP6060 Operator’s Manual
for complete instructions.
3.13 Carbon Dioxide Additive Control (CO
2
Option)
The CO
2
option package includes CO
2
sensor, CO
2
regulator (North America only), control valve,
and injection system, CO
2
tank not included. Mounted on the interior wall, an independent CO
2
detector connects to a horn strobe that will provide an audible and visual alert in the event of
elevated C0
2
levels. The detector is also wired into Conviron’s control system for alarm
enunciation. Threshold alarm point for this redundant detector is user-settable to match local
regulatory standards for notification of excessive CO
2
levels. Option allows for range from ambient
up to 2,900ppm. Maximum sensor reading range of 3,000ppm.
CO
2
exhaust is adjusted using the exhaust damper control in one of the following three modes:
•
Automatic
—the position of the exhaust damper is based on the CO
2
setpoint.
•
Open (override) mode
—the damper remains open.
•
Closed (override) mode
—the damper is closed.
Refer to the included
Conviron CMP6060 Operator’s Manual
for complete instructions.
3.13.1 Setting Up the CO
2
Control
CO
2
control requires a high-pressure and a low-pressure regulator. In most chambers the low-
pressure regulator and the solenoid assembly are located in the machine compartment and are
factory set at 2 psi (0.14 bar).
The high-pressure regulator is located on the customer-supplied CO
2
line. This regulator comes in
two styles of flow meters, a dial gauge or a glass tube and ball style. In North America, Conviron
provides the high-pressure regulator. Outside North America, the customer supplies the high-
pressure regulator due to different thread size on the CO
2
line.
DO NOT adjust the regulator on the CO
2
tank once it’s been set up.
Close the main valve on the CO
2
tank when it’s not in use.