Mitsubishi Heavy Industries HMK60, Installation Manual

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50
Electrical installation
Relay output for emergency mode
NOTE
Mark up any junction boxes with warnings for
external voltage.
When the switch (SF1) is in " " mode (emergency mode) the
circulation pump is activated (EB101-GP12).
CAUTION
No hot water is produced when emergency
mode is activated.
The emergency mode relay can be used to activate external
additional heat. Between the port 2 and 4 is closed during
emergency mode. An external thermostat must be connected to
the control circuit (port 4) to control the temperature. Ensure
that the heating medium circulates through the external
additional heating.
E P 2 3 4
SMO
Externt
X1
External
RC-HY 20/40
RC-HY20/40 X1
If the relay is to be used for control voltage, bridge the supply
from terminal block X1:1 to X1:2 and connect neutral and
control voltage from the external additional heat to X1:0 (N)
and X1:4 (L).
1 0 E P 2 3 4
SMO
Externt
N L
X1
External
RC-HY 20/40
RC-HY20/40 X1
<Connection example with HMK100>
Connect the port 4 on X1 terminal on RC-HY20/40 to
EMERGENCY on X2 terminal on HMK100, as well as the
port 0 on X1 terminal on RC-HY20/40 to Neutral on HMK100.
N
HMK100
X2
K1 K2 K3
1 2 3 0 PE
SMO
A2
A1
X1
RC-HY 20/40
RC-HY20/40 X1
X2 X1
EMERGENCY
RC - HY RC - HY
EMERGENCYEMERGENCY
Set the supply temperature with the thermostat T1 in case of
emergency mode. The setting range is 6-67℃. For floor
heating, the setting must be min.20℃ to max. 35-45℃ in order
to preserve heat comfort in the room and ensure effective
system operation. When the temperature is set at 35℃ or
higher, be careful not to cause low temperature burn.