Mitsubishi Heavy Industries HMK60, Installation Manual

Page: 153 / 288

49
Electrical installation
<Connection example with HMK100>
Connect the port 2, 4, 6 on X2 terminal on AA7 board on RC-
HY20/40 to the port K1, K2, K3 on X2 terminal on HMK100
respectively.
SMO
6
1 0 PE
HMK100
RC-HY 20/40
RC-HY 20/40
AA7-X2 X1
L N 1 1 0 2 3 4 PE
1 2 3 4
LEK
1 2 3 4
X1
1 1 N L 0 E P 2 3 4
-X2
1
12
34
56
2 3 4 5 6
-X1
AA7-X2
X2
X2 X1
M
ERGENCY RC - HY RC - HY F
K1 K2 K3 K1 K2 K3
Step controlled additional heat
NOTE
Mark up any junction boxes with warnings for
external voltage.
External step controlled additional heat can be controlled by up
to three potential-free relays in the control module (3 step
linear or 7 step binary). Alternatively two relays (2 step linear
or 3 step binary) can be used for step controlled additional
heat, which means that the third relay can be used to control
the immersion heater in the water heater/accumulator tank.
Step in occurs with at least 1 minute intervals and step outs
with at least 3 seconds intervals.
Step 1 is connected to terminal block X2:2 on the additional
relay board (AA7).
Step 2 is connected to terminal block X2:4 on the additional
relay board (AA7).
Step 3 or immersion heater in the water heater/accumulator
tank is connected to terminal block X2:6 on the additional
relay board (AA7).
The settings for step controlled additional heat are made in
menu 4.9.3 and menu 5.1.12.
All additional heat can be blocked by connecting a potential-
free switch function to the software controlled input on
terminal block X2 which is selected in menu 5.4.
SMO
E
6
1 0 PE
A1
A2
A1
A2
A1
-K1 -K2 -K3
A2
External
RC-HY
20/40
AA7-X2 X1
LEK
L N 1 1 0 2 3 4 PE
X1
1 1 N L 0 E P 2 3 4
-X2
1
12
34
56
2 3 4 5 6
-X1
AA7-X2
RC-HY20/40
If the relays are to be used for control voltage, bridge the
supply from terminal block X1:1 toX2:1, X2:3 and X2:5 on
additional relay board (AA7). Connect the neutral from the
external additional heat to terminal block X1:0.
Use a cable with appropriate cross section.
For connection, see the installation manual for additional
heater.