Wiring For Timer ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11 - Toyotomi OM-128HH Installation Manual

(AVAILABLE FROM AN ELECTRICAL SUPPLY COMPANY)
This water heater is equipped with the connection terminal for the timer. This terminal has no-voltage (also
known as dry contacts) contact. You can operate the unit with the timer by connecting the timer (option) to
the terminal for timer connection "L" on the circuit board.
When the power switch of the water heater is "ON" and the signal from no-voltage contact on the timer con-
nection terminal "L" is "OFF", the water heater stops operation and the operation lamp blinks to indicate
stand-by mode.
Remove the short-circuit terminal connected to the "L" terminal and connect the cord of the timer (option)
using the attached couplers (white).
Connect the lead wire for timer to the "L" terminal of the circuit board.
Other available timers can be connected to the unit only through a relay. Use a relay with gold contact.
How to use the coupler
Make
3/16 in.
(4-5mm)
space.
Lead wire for
timer
Stopper
Power lead wire
of the timer
WARNING: Do not energize the connection terminal of the timer with voltage, as it may damage the circuit
board.
WIRING FOR A TIMER
Timer
(available from an electrical
supply company)
Main Circuit Board
SW1
3
2
1
Timer
(L)
12