172-65627M-09 (SQ10) 18 Oct 2021
62
mA to 20 mA external signal.
When obtaining the hot water outlet temperature via analog signal, the
output range should be: 4 mA
→
0
C, 20 mA
→
100
C.
(6) Terminal block numbers: Output Temperature Measured Value: 06, 05, SE
(7) Emergency stop input (voltage free contact):
When there is a requirement for
components other than the unit, such as
master control panels or temperature
switches, to force the unit to do an
emergency stop from the control circuit,
these terminals can be used to conduct
the emergency stop.
(Emergency stop refers to a loop that
forcefully stops the power supply to the
sequencer which contains the unit
’s
control program.)
The unit cannot restart while the
emergency stop input is consistently
supplied. Furthermore, since the loop
forces the power supply to the sequencer
and touch panel to be shut down, the
operation history will not remain in the
alarm log.
Terminal block numbers: L1 (R1), (28)
4. Option: Wiring of the control panel for the circulating pump
The unit has an optional control panel for the circulating
pump. In order to link up with operation of the circulating
pump, the circulating pump should be connected to this
control panel.
(1) Remove the side cover from side of the unit on
which the control panel for the circulating pump is
installed.
(2) Remove the control panel cover.
Loosen each of the corner screws with a Phillips
screwdriver to remove the cover. When reattaching the
cover after the wiring work is complete, make sure that
each screw on every corner has been firmly fastened so
there are no gaps between the cover and body.
Any gaps between the cover and body will limit the
waterproof protection for the control panel, and
consequently water leakage from piping etc. may cause an accident such
as an electric leakage.
L1
28
