Maritime Geothermal ATF-45, Инструкция по установке и обслуживанию

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1-Jun-2018 Page 13 002000MAN-01
Wiring
IMPORTANT NOTE: A properly qualified
electrician should be retained for all
connections to the heat pump and associat-
ed controls. The connections to the unit
MUST CONFORM TO LOCAL CODES.
TABLE 3 - Power Supply Connections
Line Description Voltages
L1 Line 1 All
L2 Line 2 All
L3 Line 3 3-phase only
GND Ground All (connect to ground lug)
** Only required if connecting 115VAC circulators.
N** Neutral 208/230-1-60, 208-3-60
Indoor Unit Power Supply Connections
Power supply for the heat pump from the breaker panel is
supplied to the indoor unit. The unit has a concentric 1.093” /
0.875” knockout for main power supply connection to the electri-
cal box. There are also two 7/8” knockouts and a 1/2” opening
with plastic grommet (grommet hole is 3/8”) for connections to
the air thermostat, optional aquastat, and power and signal con-
nections to the outdoor unit.
A schematic diagram (SCH) and electrical box layout
diagram (ELB) can be found on the electrical box cover of the
unit as well as in the Model Specific Information section of this
manual.
The Electrical Tables in the Model Specific Information
section contain information about the wire and breaker size.
Indoor Loop Circulator Pump Wiring
The indoor unit has provisions for connecting the indoor
circulator pump (between the heat pump and buffer tank) so that
it will be turned on whenever the compressor operates. Con-
nect the circulator pump module to the appropriate two terminals
( 115V & 115/230 or 230V & 115/230 ) of the terminal strip
marked Indoor Circulator Pumps , as per the voltage of the circu-
lator pump module. Ground wires should be connected to the
ground lug in the electrical box. Ensure that the total current
draw does not exceed the value indicated on the label in the
heat pump electrical box.
For 460VAC models , only 277VAC circulators may be
powered directly from the heat pump. If other voltage circulators
are used, they must be powered using an external contactor
actuated by the ICR terminal on the left side of the control board
and the C (24V ground) terminal.
TABLE 6 - Indoor Loop Circulator Connections
Signal Description
115V
230V
Use a 2-conductor 14ga cable.
Connection for 115V circulator
Connection for 230V circulator
115/230 Connection for 115V or 230V circulator
TABLE 4 - Outdoor Unit Power Supply Connections
Line Description
L1 Supply line
L2 Supply line
GND Ground
Use a two conductor outdoor rated 14ga minimum cable.
IMPORTANT NOTE: According to most
codes, a disconnect switch visible and/or
reachable from the outdoor unit must be in-
stalled in the power supply cable. If the
switch has fuses or breakers they must be
no more than 10A.
Outdoor Unit: Power Connections
The ACE outdoor unit is powered from the indoor unit.
The power supply for the ACE unit is 208 to 277VAC, 50/60Hz.
The ATF and ACE units have matching terminal strips for these
connections. Use a two conductor, minimum 14ga outdoor rat-
ed cable for this connection. Refer to diagram.
the size of wire for the connections, as well as the recommend-
ed breaker size.
Auxiliary Plenum Heater:
Signal Connections
The ATF unit has two dry contacts to control the 2 stages
of the plenum heater. These dry contacts can also be used to
control other types of auxiliary air heat. Note that dry contacts
are intended to activate equipment that has its own 24VAC
transformer; if equipment does not have its own transformer,
one will need to be installed in an external electrical box.
Connect the terminals on the ATF’s terminal strip to the
matching terminals on the plenum heater’s control board using
an 18-3 cable.
TABLE 5 - Plenum Heater Signal Connections
Signal Description
C
P
Common
1
2
Use a 3-conductor 18ga cable.
Dry contact for auxiliary heat stage 1
Dry contact for auxiliary heat stage 2
Auxiliary Plenum Heater:
Power Supply Connections
Auxiliary air heat will usually be provided by an electric
duct heater (plenum heater). These are available as accesso-
ries in 5, 7, 10, 15, and 20 kW sizes, and are installed as previ-
ously noted in this manual. The plenum heater will have its own
breaker and power supply wire. The Electrical Tables in the
Model Specific Information section contain information about
Control Transformer
The rest of the low voltage controls, including the control
board, are powered by a 100VA class II transformer. 208/230-1
-60 and 208-3-60 models have a resettable breaker on the sec-
ondary side for circuit protection. Should the breaker trip, locate
and correct the problem and then reset the breaker by pressing
in on it.
All other voltage models have primary and secondary fus-
es for circuit protection.