PART III ELECTRICAL SYSTEM OF THE UNIT
3-3
ENGLISH
Fig. 3.1-5 The interlock switch (100000 cycles endurance).
When you remove the bottom plate you can find the twin interlock switch on the right upper corner of the bottom. The two
interlock switches are put together with the stainless metal plate 1# and connected to the bottom by stainless metal plate 2#.
The height of the metal plate 1# is about 1mm higher than the interlock switch so to protect the lever from breakdown when
the actuator push down the interlock switches.
Fuse
You can see the fuse holder on the back (left
bottom) of the unit. The rating for the fuse is
125V, 2A. One spare fuse is prepared in the
operation manual plastic bag.
The Live line passes through the fuse and
interlock switch before it is connected to the
main circuit board (Fig. 3.1-1~2). The fuse will
be blown out when there is a short circuit in the
unit or a electrical leakage on the power cord
wires.
Actuator
Interlock switch
actuator
Activated
carbon filter
Electrical power cord
The unit uses a grounding type plug, rating for
16-18 AWG. This plug will only fit into a
grounded power outlet. If the plug does not fit
into the outlet, contact a qualified person to
install the proper outlet. Do not alter the plug in
any way.
The power cord has three wires, the green
colour Ground, the white color Live line and the
black color Neutral wire. The power cord is
secured on the back of the unit by power cord
strain relief bushing.
Power cord
strain relief bushing
Fig. 3.1-3 Electrical power cord of the unit.
Fig. 3.1-4 The fuse holder and power cord on the back of the unit.
1-Fuse hoder, 2-Power cord and strain relief bushing.
Ground
Ground
Live line (White)
Neutural
wire (Black)
Live
Neutural
1
1
2
2
Interlock switch
There are two same interlock switches in the unit. One interlock switch is connected to the Neutral wire of the power
cord (Black color) before it connect to the main circuit board. Another interlock switch is connected to the Live line
passing through the fuse before it goes to the main circuit board (Fig. 3.1-1~2). Each interlock switch is provided with
a lever which can be actuated by the actuator on the front panel. The two interlock switch open all supply conductors
simultaneously when opening the front panel for servicing (Fig. 3.1-5). When the front panel is closed the actuator
pushes down the interlock switch levers and the unit will operate. When the front panel is opened the levers will be
spring out and interrupt the Live line and Neutral wire at the same time to stop the operation. The purpose of the
interlock system is to interrupt the operation of the unit when the front panel (air intake) is opened by accident, and
similarly, to prevent any operation until the front panel is firmly and safely closed. If one or two of the interlock switch
levers are broken the unit can not be operated. Also, if the actuator can not push down the interlock switches the unit
1
1
2
2
Summary of Contents for R200T
Page 69: ...ENGLISH NOTES ...