7. SYSTEM DESIGN GUIDE
DATA G10
HEAT SOURCE UNITS
2 - 406
WY
Indoor
unit
Heat source
equipment
Water
circuit
Heat source
water pump
(MP)
Site control panel
Refrigerant piping
Transmission line
Remote controller
Room-A
Indoor
unit
Room-B
Room-E
Indoor
unit
Room-C
Indoor
unit
Room-D
Room-F
(Remote controller
operation at two spot)
Room-G
6) Pump interlock circuit
TM1
TM2
1
TB8
Heat source equipment
Heat source equipment
To next equipment
2
3
4
1
TB8
2
3
4
52P
MP
Site control panel
~ / N 240/230/220V
X
:
Relay
TM1, 2
: Timer relay
(closes after elapsing
the set time when it is
powered, while opens
promptly when it is not
powered)
52P
: Magnetic contactor
for heat source
water pump
MP
: Heat source
water pump
MCB :
Circuit
breaker
*Remove the short circuit
wire between 3 and 4
when wiring to TB8.
52P
TM1
MCB
TM2
• Plural indoor units (8HP:13sets, 16HP:16sets maximum) being connected to
a single refrigerant system can be controlled individually.
• The transmission line is of a jumper wiring system using non-polar 2 wires.
This circuit uses the “T
erminal block for pump interlock (TB8)“ inside the electrical parts box of the heat source equipment.
This circuit is for interlocking of the heat source equipment operation and the heat source water pump.
Wiring diagram
L1
N
