Avantra 36/44 Service Manual
2.15 Humidifier Option Overview
This section describes the mechanical, electrical and software characteristics for a
field installable humidifier sub-system.
2.15.1 General Description
The humidifier creates a 50% (±5%) relative humidity in the drum 15 minutes after
the humidifier is turned on. The system maintains an ambient range of 45% to 55%
humidity while remaining within the imagesetter's operating temperature range.
The humidifie unit installs within the imagesetter; the replenishment water supply
mounts on the outside of the imagesetter for ease of access.
The following sub-assemblies make up the humidifier system:
•
Humidifier sub-assembly
•
Module sub-assembly
•
Water supply)
•
Electronics module (board)
•
Float switch/water valve solenoid
•
Fan control circuit
•
Interface connections
•
Switched +24 volt driver
•
Fan speed selector
The following describes the function of each.
2.15.2 Humidifier Sub-assembly
The sub-assembly described below consists of the following:
•
A 30 pore per inch air filter
•
A water wick
•
A 24 VDC 150 CFM fan
•
A 90˚ PVC elbow
•
A float switch
•
A 24 VDC solenoid valve
•
A humidifier enclosure
•
Two quick disconnect couplings
The sub-assembly, a two part plastic module, mounts inside via a sheet metal inter-
face plate. The subassembly provides moist air to the imagesetter drum. Air inlet
and outlet ports on the module connect the flexible air hose to each end of the
drum.
2-34 Functional Analysis