38
REMOTE ALARM TERMINAL
The alarm is relayed to a remote location when a remote alarm device (commercially available) is
connected to the remote alarm terminal. Installation of a remote alarm device is recommended when the
unit is installed in an unattended location so that the operator of the unit is notified of the alarm.
Contact our sales representative or agent to arrange the installation of a remote alarm device.
Location of remote alarm terminal: lower left side
Allowable contact capacity: DC 30 V, 2 A
Contact output:
Connection
Normal status
Abnormal status
Between COM. and N.O.
open
closed
Between COM. and N.C.
closed
open
The remote alarm terminal will be in alarm mode when the power supply cord is unplugged or the power
switch is turned off because this will be interpreted as a power failure.
AIR RELEASE PORT
It may be difficult to open the outer door immediately after closing the outer door. This is due to the
difference in presssure inside and outside of the chamber.
To open the outer door smoothly, follow the procedure below:
1.
Loosen the cap on the air release port by two turns, or
remove the cap.
2.
Allow about twenty seconds before opening the outer
door.
3.
Open the outer door.
4.
Replace and fasten the cap firmly after closing the outer door.
Improper replacement may cause the temperature to rise or condensation around the air release port.
The outer door may still not open even if the cap on the air release port is removed. In this case,
remove the cap and check for frost inside the air release port. If excessive frost has built up in the air
release port, remove with the enclosed "stick for frost removal". Check and remove excessive frost once
a month. Refer to page 44 for details.
Do not use any tools with sharp edges (such as knives or screw-drivers) to remove the frost in the air
release port.
Cap
Two turns
Use a twisted sealed wire for the connection.
Type: UL 2343, UL 2448, UL 2464, UL 2552, UL 2623
Length: 30 m max.
