Leak Testing; Electrical Shock Cautions - York YHAU-CW Manual

SECTION 3 – HANDLING, STORAGE, INSTALLATION AND REASSEMBLY
During service and maintenance work, be
sure to turn OFF the main circuit breaker
(MCB1) and follow all required lockout/
tagout procedures. Close the main valve
of the steam line to prevent electric shock
and injury.
If the cables of the solution pump, refrigerant pump, or
vacuum pump are disconnected for service and main-
tenance work, be sure to check the rotating direction
of the pump motor. If not, the chiller may malfunction.
When changing the oil of the vacuum pump, be sure to
stop the purge operation.
In case of an accident, use the emergency stop device
(external handle of MCB1) to stop the chiller imme-
diately.

LEAK TESTING

When leak testing, verify the area is properly venti-
lated. Failure to do so may result in suffocation.
28

ELECTRICAL SHOCK CAUTIONS

Do not touch the control panel with wet hands. This
can cause electric shock. Do not touch the wiring in the
control panel.
Do not touch any part other than the control panel of
the machine and the valves described in the operating
manual. This can cause a unit malfunction and injury.
Apply only the specified source voltage. Application of
a different voltage can cause a fire and electric shock.
Welding should only be done in certain circumstances.
If welding is done, be careful not to compromise the
integrity of the vessel. Prior to welding, be absolutely
certain that the electrical system is grounded properly.
Do not splash water over the machine and its control
panel; this can cause an electric shock.
A warning label for electric shock is pasted at the con-
trol panel, solution pump, refrigerant pump, and the
terminal box of the vacuum pump motor. Before open-
ing the terminal box, be sure to stop the chiller and turn
OFF the main circuit breaker (MCB1).
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
JOHNSON CONTROLS