20
6.6.4 Electrical Connection for the HydroBox Indoor
Unit – Wiring Hub
All wiring to and from the HydroBox is done at the wiring hub. To access the
wiring hub, remove the left panel, when looking at the front of the HydroBox
with the touch screen controller. There will be a separate cover that will
need to be removed to access the line voltage section of the wiring hub. All
wires can be brought into the wiring hub through the back of the HydroBox.
The following must be connected in order to operated the HydroBox:
• Supply voltage - HydroBox communication/control, touch screen
display, HydroBox heat pump circulating pump (M16), and domestic
hot water circulating pump (M18):
120 volt, single phase, 60 hz power off a 15 amp 1-pole circuit breaker
needs to be supplied to the HydroBox wiring hub (terminal numbers
3, 4 and 7)
APP
BY
ENG
.XXX ± .005[.127]
CONTROL
APP
ALL COPIES MADE, IMMEDIATELY WHEN REQUESTED BY TACO.
FORMAT REV 9-1-17
PRELIMINARY
1:2
CI
VOL
DATE
APP
MFG
IT AND YOU AGREE TO RETURN THE DOCUMENT, TOGETHER WITH
QA
INCHES [MM]
07/16/2020
aco
Inc.
7
REV
BREAK SHARP EDGES
R.005[.127]TO.015[.38]
FOR ANY DAMAGES ARISING OUT OF YOUR USE OR MODIFICATION TO
125
FINISHES
THIS DOCUMENT, YOU AGREE THAT TACO WILL HAVE NO LIABILITY
ANSI Y14.5
SYMBOLS PER
D
6
OF
SHEET
JJK
UNLESS OTHERWISE SPECIFIED:
ANGLES ± 1°
FEATURE
.XXXX ± .0005[.0127]
1
SIZE
ECO/Submittal
SCALE
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL
AND PROPRIETARY TO TACO, INC. (“TACO”). IT IS PROVIDED FOR USE
ONLY FOR THE PURPOSES EXPRESSLY STATED BY TACO. BY USING
FRACTIONS±1/64[.397]
.XX ± .02[.508]
DR
CRANSTON, R.I.
APP
BY
ENG
.XXX ± .005[.127]
CONTROL
APP
ALL COPIES MADE, IMMEDIATELY WHEN REQUESTED BY TACO.
FORMAT REV 9-1-17
PRELIMINARY
1:2
CI
VOL
DATE
APP
MFG
IT AND YOU AGREE TO RETURN THE DOCUMENT, TOGETHER WITH
QA
INCHES [MM]
07/16/2020
aco
Inc.
7
REV
BREAK SHARP EDGES
R.005[.127]TO.015[.38]
FOR ANY DAMAGES ARISING OUT OF YOUR USE OR MODIFICATION TO
125
FINISHES
THIS DOCUMENT, YOU AGREE THAT TACO WILL HAVE NO LIABILITY
ANSI Y14.5
SYMBOLS PER
D
6
OF
SHEET
JJK
UNLESS OTHERWISE SPECIFIED:
ANGLES ± 1°
FEATURE
.XXXX ± .0005[.0127]
1
SIZE
ECO/Submittal
SCALE
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL
AND PROPRIETARY TO TACO, INC. (“TACO”). IT IS PROVIDED FOR USE
ONLY FOR THE PURPOSES EXPRESSLY STATED BY TACO. BY USING
FRACTIONS±1/64[.397]
.XX ± .02[.508]
DR
CRANSTON, R.I.
Fig. 15
Fig. 16
Fig. 17: HydroBox Wiring Hub
Ferrites (F60.01 and F60.02) must be installed at X1 and X2
terminations and are included in the accessories bag.
To access the wiring terminals in the heat pump outdoor unit, remove the
two side panels as shown in figure 3. Then remove the rear panel by
unscrewing the 3 screws on each side and then tilt and lift up. Access
the DIN rail mounted terminal blocks by removing the cover of the inverter
enclosure at the bottom of the unit. See figure 16 above for wiring details
on connecting power to X1 & X2 and communications to J11.
Utility block - optional:
The utility company’s blocking contactor with main contact and
auxiliary contact should be designed according to the heat pump
output, and must be supplied on-site. The floating NO contact of
the utility company’s blocking contactor is wired to the heat pump
manager and must be connected on the relevant plug DI1 for full
block (2 hour max) or DI2 for block (where freeze protection is still
enabled). Caution! Extra-low voltage!
A (+)
COMMUNICATION TO
HEAT PUMP OUTDOOR
UNIT TERMINAL N0-J11
B (-)
1
2
1
2
1
2
1
2
1
2
N
L
N
L
8 AWG
GND
GND
GND
GND
L1
L2
OUTDOOR
TEMPERATURE SENSOR
DHW
TEMPERATURE SENSOR
HEATING DEMAND -
SMART GRID 2
FORCED COOLING
CHANGE-OVER
HEAT/COOL CIRC PUMP
0-10 VDC SIGNAL
POWER OUTPUT
CONTACTOR FOR DHW
IMMERSION HEATER
120 VAC, 1A
POWER INPUT
120 VAC, 5A
GROUND
BUFFER TANK
IMMERSION HEATER
240 VAC, 26A
710-1048
GND
A (+)
COMMUNICATION TO
HEAT PUMP OUTDOOR
UNIT TERMINAL N0-J11
B (-)
1
2
1
2
1
2
1
2
1
2
N
L
N
L
8 AWG
GND
GND
GND
GND
L1
L2
OUTDOOR
TEMPERATURE SENSOR
DHW
TEMPERATURE SENSOR
HEATING DEMAND -
SMART GRID 2
FORCED COOLING
CHANGE-OVER
HEAT/COOL CIRC PUMP
0-10 VDC SIGNAL
POWER OUTPUT
CONTACTOR FOR DHW
IMMERSION HEATER
120 VAC, 1A
POWER INPUT
120 VAC, 5A
GROUND
BUFFER TANK
IMMERSION HEATER
240 VAC, 26A
710-1048
GND
A (+)
COMMUNICATION TO
HEAT PUMP OUTDOOR
UNIT TERMINAL N0-J11
B (-)
1
2
1
2
1
2
1
2
1
2
N
L
N
L
8 AWG
GND
GND
GND
GND
L1
L2
OUTDOOR
TEMPERATURE SENSOR
DHW
TEMPERATURE SENSOR
HEATING DEMAND -
SMART GRID 2
FORCED COOLING
CHANGE-OVER
HEAT/COOL CIRC PUMP
0-10 VDC SIGNAL
POWER OUTPUT
CONTACTOR FOR DHW
IMMERSION HEATER
120 VAC, 1A
POWER INPUT
120 VAC, 5A
GROUND
BUFFER TANK
IMMERSION HEATER
240 VAC, 26A
710-1048
GND
Right hand side of the terminal block are factory wired.
X1
X2
PE
N
L
L2
L1
PE
RS485
J11
N0
R
x-
/T
x-
R
x+
/T
x+
G
N
D
+A200
1~/N/PE
120V AC
60Hz
+A300
2~/N/PE
240V AC
60Hz
+A200
•
•
452169.21.14
X2
F1
N0
X1
Snap-on Ferrite
F60.02
1 Turn
Solid Core Ferrite
F60.01
2 Turns
J11
Electrical connections
In the lower section of the wiring hub is all the low voltage connection.
Required connections for proper operation of the System M includes:
• Communication between the Heat Pump outdoor unit and HydroBox
indoor unit:
The Modbus communication cable must a 24 AWG shielded, single
twisted pair (or CAT 6). The cable must be shielded and grounded at
each termination. At the HydroBox, connection is between the A(+),
B(-), and ground (terminals 1, 2 & 3) in the Hydrobox wiring hub. At
the heat pump outdoor unit, connection is between NO / J11 terminals
Rx+/Tx+, Rx-/Tx-, and ground. See figure 16.
• Outdoor Temperature Sensor:
Connect terminals 4 & 5 to the supplpied outdoor temperature sensor.
(Also see section 6.5.2)
• Domestic Hot Water Tank Temperature Sensor:
A DHW call is activated by the supplied sensor field-installed in the
thermal well in the SMT85-1 DHW tank. Connection is between
terminals 6 & 7 in the HydroBox wiring hub and the DHW tank sensor.
(See section 6.4)
IMPORTANT.
The 120 VAC power supplied to the HydroBox and the
Heat Pump outdoor unit must be run in parallel and supplied from the
same dedicated circuit. This simultaneously turns on both units, ensuring
communications synching between the two unit’s controllers.
X1
X2
PE
N
L
L2
L1
PE
RS485
J11
N0
R
x-
/T
x-
R
x+
/T
x+
G
N
D
+A200
1~/N/PE
120V AC
60Hz
+A300
2~/N/PE
240V AC
60Hz
+A200
•
•
452169.21.14
X2
F1
N0
X1
Snap-on Ferrite
F60.02
1 Turn
Solid Core Ferrite
F60.01
2 Turns
J11
Electrical connections
