Water Furnace Envision User manual

IM1007WNA 01/21
Installation Information
Water Piping Connections
Electrical Data
Microprocessor Control
Startup Procedures
Preventive Maintenance
NDW Installation Manual
NDW 8 to 15 Tons Hydronic Heat Pump

NDW INSTALLATION MANUAL
Table of Contents
Model Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
General Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Field Connected Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical Application Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
The Aurora Base Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
HydroZone Controller Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reference Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Unit Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Operating Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Pressure Drop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Thermistor and Compressor Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Heat of Extraction/Rejection Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Heating Cycle Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Cooling Cycle Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Startup and Troubleshooting Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Revision Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4
NDW INSTALLATION MANUAL
Model Nomenclature
NDW 120 R 1 H A B
1-3 4-6 7 8 9 10 11
Model
NDW –Dual Compressor
Hydronic Heat Pump
Unit Cap acity ( MBT UH)
100, 120, 150, 180
Operation
R - Reversible
Voltage
1 – 208-230/60/1 (Residential)2
0 – 208-230/60/1 (Commercial)2
3 – 208-230/60/3
4 – 460/60/3
5 – 575/60/3
Vintage
* – Factory Use Only
Non-Standard Options
S –Standard
Control Box Location
1 – Front
2 – Back
Water Connections
B –Back Mounted Connections
T –Top Mounted Connections
IntelliStartTM Option
N –None
A –IntelliStart 3
Controls
H –Aurora Advanced Controls with
Energy and Refrigeration Monitoring
HydroZone 0 (HZO) Included
B –Aurora HydroLi nk2 (B ACnet)1 4
1
12
*
14
Rev.: 10 Oct 2020B
S
13
Notes:
1–Aurora HydroLink2 controls available for commercial units only.
2–Dual power feed required.
3 – IntelliStart Option available for single phase voltage options only.
4–HydroLink2 control option available to Commercial Reps only.
All Envision Series product is safety listed under UL1995 thru ETL and performance listed with AHRI in
accordance with standard 13256-2. The Envision Series is also Energy Star rated.

5
NDW INSTALLATION MANUAL
Safety Considerations
Installing and servicing air conditioning and heating
equipment can be hazardous due to system pressure and
electrical components. Only trained and qualified service
personnel should install, repair or service heating and air
conditioning equipment. When working on heating and
air conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit and other
safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have
fire extinguisher available for all brazing operations.
NOTE: Before installing, check voltage of unit(s) to ensure
proper voltage.
WARNING: Before performing service or
maintenance operations on the system, turn off
main power switches to the unit. Electrical shock
could cause serious personal injury.
Application
Units are not intended for heating domestic (potable) water
by direct coupling. If used for this type of application, a
secondary heat exchanger must be used.
Moving and Storage
Move units in the normal “Up” orientation as indicated by
the labels on the unit packaging. When the equipment
is received, all items should be carefully checked against
the bill of lading to ensure that all crates and cartons
have been received in good condition. Examine units for
shipping damage, removing unit packaging if necessary
to properly inspect unit. Units in question should also
be internally inspected. If any damage is observed, the
carrier should make the proper notation on delivery receipt
acknowledging the damage. Units are to be stored in a
location that provides adequate protection from dirt, debris
and moisture.
WARNING: To avoid equipment damage, do not
leave the system filled in a building without heat
during cold weather, unless adequate freeze
protection levels of antifreeze are used. Heat
exchangers do not fully drain and will freeze
unless protected, causing permanent damage.
General Installation Information
Unit Location
Provide sufficient room to make water and electrical
connections. If the unit is located in a confined space,
provisions must be made for unit servicing. Locate the
unit in an indoor area that allows easy removal of the
access panels and has enough space for service personnel
to perform maintenance or repair. These units are not
approved for outdoor installation and, therefore, must be
installed inside the structure being conditioned. Do not
locate units in areas subject to freezing conditions.
WARNING: Do not store or install units in
corrosive environments or in locations subject
to temperature or humidity extremes (e.g. attics,
garages, rooftops, etc.). Corrosive conditions and
high temperature or humidity can significantly
reduce performance, reliability, and service life.
WARNING: To avoid equipment damage and
possible voiding of warranty, be sure that
properly sized strainers are installed upstream
of both brazed plate heat exchangers to protect
them against particles in the fluid.
Mounting Units
Prior to setting the unit in place, remove and discard
both compressor hold down shipping bolts located at the
front of each compressor mounting bracket. Units should
be mounted level on a vibration absorbing pad slightly
larger than the base to provide isolation between the
unit and the floor. It is not necessary to anchor the unit to
the floor. Allow access to the front, back, and side access
panels for servicing.
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6
NDW INSTALLATION MANUAL
Dimensional Data
CONTROL BOX
2' ALTERNATE
SERVICE ACCESS
OPTIONAL LOW
VOLTAGE
(7/8" KNOCKOUT)
OPTIONAL
TOP WATER
CONNECTIONS
LINE VOLTAGE
(1-3/8" KNOCKOUTS)
LOW VOLTAGE
(7/8" KNOCKOUT)
CONTROL BOX
BACK LOCATION
12.11
33.60
25.58
24.01
10.18
12.11
14.05
5.28
5.82
2.26
21.07
2.26
LOAD
SOURCE
FRONT
BACK
WATERLINES
2'
PRIMARY
SERVICE
ACCESS
LOAD
SOURCE
CONTROL BOX
FRONT LOCATION
2' ALTERNATE
SERVICE ACCESS
OPTIONAL LOW VOLTAGE
(7/8" KNOCKOUT)
LINE VOLTAGE
(1-3/8" KNOCKOUTS)
LOW VOLTAGE
(7/8" KNOCKOUT)
CONTROL BOX
17.00
12.11
33.59
25.58
24.01
2.16 21.06 2.16
2.96 10.18
12.11
14.05
FRONT
BACK
WATERLINES
2'
PRIMARY
SERVICE
ACCESS
100-180 - Top Waterline Configuration
100-180 - Back Waterline Configuration

7
NDW INSTALLATION MANUAL
Physical Data
Model Model
100 120 150 180
Compressor (2 each) Scroll
Factory Charge R410A, oz [kg] 62 [1.76] 62 [1.76] 62 [1.76] 62 [1.76]
Load Water Connection
FPT - in 2222
Source Water Connection
FPT - in 2222
Weight - Operating, lb [kg] 390 [177] 400 [181] 400 [181] 420 [190]
Weight - Packaged, lb [kg] 385 [175] 395 [179] 395 [179] 415 [188]
3/9/09

8
NDW INSTALLATION MANUAL
General
Each unit is equipped with captive 2 in. [50.8 mm] FPT water
connections to eliminate ‘egg-shaping’ from use of a backup
wrench. For making the water connections to the unit, a Teflon
tape thread sealant is recommended to minimize internal
fouling of the piping. Do not over tighten connections.
NOTE: Units are factory run-tested using propylene
glycol. Prior to connecting piping to unit, thoroughly
flush heat exchangers.
The piping installation should provide service personnel
with the ability to measure water temperatures and
pressures. The water lines should be routed so as not to
interfere with access to the unit. The use of a short length
of high pressure hose with a swivel type fitting may simplify
the connections and prevent vibration. Optional stainless
steel hose kits are available as an accessory item.
Before final connection to the unit, the supply and return
hose kits must be connected, and the system flushed
to remove dirt, piping chips and other foreign material.
Normally, a combination balancing and close-off (ball) valve
is installed at the return, and a rated gate or ball valve is
installed at the supply. The return valve can be adjusted to
obtain the proper water flow. The valves allow the unit to
be removed for servicing. Both source as well as load fluid
piping must be at least as large as the unit connections on
the heat pump (larger on long runs).
Never use flexible hoses of a smaller inside diameter than
that of the water connection on the unit and limit hose length
to 10 ft. per connection. Check carefully for water leaks.
Load and Source Piping Connections
The Two-Stage Hydronic Series has two connection options
available. Each kit is intended to connect one piping
connection. Therefore, two kits will be required for each unit.
The kits can be mixed for installer convenience, one on source
and the other on load.
CKNDW1 - Strainer Connection Kit includes a 2” copper tee with
integral P/T plug and a 2” “Y” strainer. Other components to
complete the all copper piping can be sourced locally.
WFI-XYH200-F-24MO-M - Strainer Hose Kit set includes
2” Hose kit includes a 2” stainless steel braided hose with
integral P/T plug and 2” “Y” strainer.
Field Connected Water Piping
Water Flow Rate
The proper water flow must be delivered to each unit
whenever the unit heats or cools. To assure proper flow,
the use of pressure/temperature ports is recommended
to determine the flow rate. These ports should be located
adjacent to the supply and return connections on the unit.
The proper flow rate cannot be accurately set without
measuring the water pressure drop through the refrigerant-
to-water heat exchanger (See Pressure Drop Table for water
flow and pressure drop information).
Load Flow Rate
The load flow on all water to water products should be 3
gpm per ton (typically the rated flow and the highest flow
shown in the capacity charts). Refer to the table below. This
flow rate is required especially when heating water to limit
the effects of the higher condensing temperatures of water
heating for radiant floor heating or domestic water use.
Source Flow Rate
The source flow can range between 2.25 and 3 gpm per
ton for earth loops. For open loop well water systems the
minimum flow should be 1.5 gpm per ton. In earth loop
systems where entering water temperatures are expected to
be above 95°F, 3 gpm per ton should be used. In well systems
where the water temperature is below 50°F, 2 gpm per ton
should be used to avoid nuisance freeze detection trips.
Flushing
Flushing the system of debris is especially important in
brazed plate heat exchanger systems. These systems have
many small parallel flow paths in which debris can clog.
Initial flushing of the system can be accomplished in one
of two ways. First flushing the piping system toward the
strainer will allow the strainers to capture all debris prior the
heat exchangers and commissioning. Secondly a temporary
bypass can be included in the piping design so that the heat
pump itself can be bypassed during the initial flushing stage
with an external strainer gathering the debris.
CAUTION: Water piping exposed to outside
temperature may be subject to freezing.
Source Flow Rate
Load
Flow
Rate
Minimum
Open
Loop
Open
Loop
< 50°F
Closed Loop Range
(Min - Full Flow)
100 15 20 23 30 30
120 18 24 27 36 36
150 21 28 32 42 42
180 24 32 36 48 48
CKNDW1
WFI-XYH200-F-24MO-M

9
NDW INSTALLATION MANUAL
Field Connected Water Piping cont.
Closed Loop Tower/Boiler Systems
The water loop is usually maintained between 60°F [15.5°C]
and 90°F [32.2°C] for proper heating and cooling operation.
This is accomplished with a cooling tower and a boiler.
To reject excess heat from the condenser water loop, the
use of a closed-circuit evaporative cooler or an open type
cooling tower with a secondary heat exchanger between
the tower and the condenser water loop is recommended.
If an open type cooling tower is used without a secondary
heat exchanger, continuous chemical treatment and filtering
of the water must be performed to ensure the water is free
from damaging materials.
CAUTION: Water piping exposed to outside
temperature may be subject to freezing.
Open Loop Well Water Systems
Installation of an open loop system is not recommended
unless water quality guidelines are met.
Earth Coupled Systems
All supply and return water piping should be insulated to
prevent excess condensation from forming on the water
lines. Ensure pumping system is capable of providing
adequate flow rate at the system pressure drop, 3.0 GPM
per ton [0.054 LPS per kW] (source side) is recommended.
Antifreeze in the loop is strongly recommended.
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10
NDW INSTALLATION MANUAL
Typical Application Piping
LOAD PUMP
HYDRONIC
LOAD
Source OUT
P/T Ports
Ball Valve
Dielectric
Unions
Dielectric
Unions
WaterFurnace
NDW Series
NOTE: * A 30 PSI pressure relief valve
(Part No: SRV30) should be used in
hydronic applications.
1-1/2˝
FPT
Expansion
Tank
Air
Vent
Pressure
Gauge
30 PSI
RELIEF VALVE
Air
Separator
Back Flow Preventer /
Pressure Relief Valve
GEO
STORAGE
TANK
3-Way Valves
Y-Strainer
(required to prevent
damage from fouling)
Hose Kit
Pressure
Reduction
Pressure
Reduction
Hose Kit
P/T Ports
Source IN
Y-Strainer
(required to prevent
damage from fouling)
Flow Switch
(optional)
Unit

11
NDW INSTALLATION MANUAL
General
Hydronic systems may be successfully applied in a wide range
of residential, commercial, and industrial applications. It is the
responsibility of the system designer and installing contractor
to ensure that acceptable water quality is present and that all
applicable codes have been met in these installations.
Water Treatment
Do not use untreated or improperly treated water. Equipment
damage may occur. The use of improperly treated or untreated
water in this equipment may result in scaling, erosion, corrosion,
algae or slime. The services of a qualified water treatment
specialist should be engaged to determine what treatment,
if any, is required. The product warranty specifically excludes
liability for corrosion, erosion or deterioration of equipment.
The heat exchangers in the units are 316 stainless steel plates
with copper brazing. The water piping in the heat exchanger
is steel. There may be other materials in the building’s piping
system that the designer may need to take into consideration
when deciding the parameters of the water quality.
If an antifreeze or water treatment solution is to be used, the
designer should confirm it does not have a detrimental effect
on the materials in the system.
Contaminated Water
In applications where the water quality cannot be held to
prescribed limits, the use of a secondary or intermediate heat
exchanger is recommended to separate the unit from the
contaminated water.
Material Copper 90/10 Cupronickel 316 Stainless Steel
pH Acidity/Alkalinity 7 - 9 7 - 9 7 - 9
Scaling Calcium and
Magnesium Carbonate
(Total Hardness)
less than 350 ppm
(Total Hardness)
less than 350 ppm
(Total Hardness)
less than 350 ppm
Corrosion
Hydrogen Sulfide Less than 0.5 ppm (rotten egg
smell appears at 0.5 ppm) 10 - 50 ppm Less than 1 ppm
Sulfates Less than 125 ppm Less than 125 ppm Less than 200 ppm
Chlorine Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Chlorides Less than 20 ppm Less than 125 ppm Less than 300 ppm
Carbon Dioxide Less than 50 ppm 10 - 50 ppm 10 - 50 ppm
Ammonia Less than 2 ppm Less than 2 ppm Less than 20 ppm
Ammonia Chloride Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Ammonia Nitrate Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Ammonia Hydroxide Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Ammonia Sulfate Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Total Dissolved Solids (TDS) Less than 1000 ppm 1000 - 1500 ppm 1000 - 1500 ppm
LSI Index +0.5 to -0.5 +0.5 to -0.5 +0.5 to -0.5
Iron Fouling
(Biological Growth)
Iron, FE2+ (Ferrous)
Bacterial Iron Potential < 0.2 ppm < 0.2 ppm < 0.2 ppm
Iron Oxide Less than 1 ppm, above this
level deposition will occur
Less than 1 ppm, above this
level deposition will occur
Less than 1 ppm, above this
level deposition will occur
Erosion
Suspended Solids Less than 10 ppm and filtered
for max. of 600 micron size
Less than 10 ppm and filtered
for max. of 600 micron size
Less than 10 ppm and filtered
for max. of 600 micron size
Threshold Velocity
(Fresh Water) < 6 ft/sec < 6 ft/sec < 6 ft/sec
NOTES: Grains = ppm divided by 17
mg/L is equivalent to ppm
2/22/12
Water Quality
The following table outlines the water quality guidelines for unit
heat exchangers. If these conditions are exceeded, a secondary
heat exchanger is required. Failure to supply a secondary heat
exchanger where needed will result in a warranty exclusion for
primary heat exchanger corrosion or failure.
Strainers
These units must have properly sized strainers upstream of
both brazed plate heat exchangers to protect them against
particles in the fluid. Failure to install proper stainers and
perform regular service can result in serious damage to the
unit, and cause degraded performance, reduced operating
life and failed compressors. Improper installation of the unit
(which includes not having proper strainers to protect the
heat exchangers) can also result in voiding the warranty.
Field supplied strainers with 20-40 mesh (530-1060 microns)
are recommended, with 30 mesh (800 microns) being the
optimum choice. The strainers selected should have a mesh
open area of at least 6 square inches (39 square centimeters)
for each unit being serviced by the strainer. Using strainers
with a smaller amount of open area will result in the need for
more frequent cleaning.
Strainers should be selected on the basis of acceptable
pressure drop, and not on pipe diameter. The strainers
selected should have a pressure drop at the nominal flow rate
of the units low enough to be within the pumping capacity of
the pump being used.
WARNING: Must have intermediate heat
exchanger when used in pool applications.
Water Quality Guidelines

12
NDW INSTALLATION MANUAL
Figure 1 - Control Box
Electrical Data
Model Supply
Circuit
Rated
Voltage
Voltage
Min/Max
Compressor* Load
Pump
FLA
Source
Pump
FLA
Total
Unit
FLA
Min
Circ
Amp
Max
Fuse/
HACR
MCC RLA LRA LRA**
100
L1/L2 208-230/60/1 187/253 41.2 26.4 134.0 47.0 - - 26.4 33.0 50
L3/L4 208-230/60/1 187/253 41.2 26.4 134.0 47.0 4.2 4.2 34.8 41.4 60
Single 208-230/60/3 187/253 24.9 16.0 110.0 66.0 - - 32.0 36.0 50
Single 460/60/3 414/506 12.1 7.8 52.0 31.0 - - 15.6 17.6 25
Single 575/60/3 517/633 8.9 5.7 38.9 - - - 11.4 12.8 15
120
L1/L2 208-230/60/1 187/253 47.0 30.1 145.0 51.0 - - 30.1 37.6 60
L3/L4 208-230/60/1 187/253 47.0 30.1 145.0 51.0 4.2 4.2 38.5 46.0 70
Single 208-230/60/3 187/253 28.0 17.3 120.0 72.0 - - 34.6 38.9 50
Single 460/60/3 414/506 15.0 9.6 70.0 42.0 - - 19.2 21.6 30
Single 575/60/3 517/633 12.5 8.0 53.0 - - - 16.0 18.0 25
150
L1/L2 208-230/60/1 187/253 42.0 26.9 145.0 51.0 - - 26.9 33.6 60
L3/L4 208-230/60/1 187/253 42.0 26.9 145.0 51.0 4.2 4.2 35.3 42.0 60
Single 208-230/60/3 187/253 35.0 22.4 190.0 114.0 - - 44.8 50.4 70
Single 460/60/3 414/506 19.0 12.2 87.0 52.0 - - 24.4 27.5 30
Single 575/60/3 517/633 15.0 9.6 62.0 - - - 19.2 21.6 30
180
L1/L2 208-230/60/1 187/253 50.0 32.1 185.0 65.0 - - 32.1 40.1 70
L3/L4 208-230/60/1 187/253 50.0 32.1 185.0 65.0 4.2 4.2 40.5 48.5 80
Single 208-230/60/3 187/253 39.0 26.0 190.0 114.0 - - 52.0 58.5 80
Single 460/60/3 414/506 19.0 13.0 100.0 60.0 - - 26.0 29.3 40
Single 575/60/3 517/633 14.5 9.3 72.0 - - - 18.6 20.9 30
3/7/13
HACR circuit breaker in USA only
* Ratings per each compressor - unit supplied with two
** With optional IntelliStart
Optional IntelliStart
208-230/60/1 units only
reduces starting current
by 60% Aurora Controls
Aurora 'Base' Control and
Aurora 'Advanced' Control
(shown)
Run Capacitor
(Single Phase Only)
Field Low Voltage
Connections
75VAC
Transformer
Compressor
Contactor (CC-A)
Pump Contactor
(CC-P)
Compressor
Contactor (CC-B)
(
g
g
F
F
F
F
F
F
F

13
NDW INSTALLATION MANUAL
Wiring Schematics

14
NDW INSTALLATION MANUAL
Wiring Schematics
208-230/60/1 Supply Power with HydroZone
24V
Tra nsf orme r
24V
Tra nsf orme r
Red
208V NOTE 1
Ground
LegendLegend
CC – Compressor Contactor CɌ– Cur rent Transducer
ELT – Enter ing Load Tem p
ES – Emergency Shutdown EST – Enter ing S ource Temp
HP – High Pressu re LFS – Load Flow Switch
LLT – Leaving Load Temp
LP – Low Pressure LST – Leaving Source Temp L-WCT – L oad W ate r Coil Temp
PB – Po wer B lo ck RV – Rev ersing Valve
SFS – Source Flow Switch S-WCT – Source Water Coil Temp
TB – Terminal Board
Fa ctor y low v olt age w ir ing
Fa ctor y line vo lt age wi ring
Field low voltage wiring
Field line voltage wiring
Optional block
Field Supplied Option
Thermistor
Relay coil
T
¼” Quick Connector
Compressor A C
R
SC
R
S
Unit Power Supply #1
208-230/60/1
GL1L1 L2L2
Unit Power Supply #1
208-230/60/1
GL1 L2
CCA
L1L2
T1T2 CCA
L1L2
T1T2
Black
Blue
Tan (25A)
10AWG Red
CCP
L1L2
T1
T2 CCP
L1L2
T1
T2
G
Load
Pump
G
Ex te rn a l
Source
Pump
NOTE 6
NotesNotes
1 – Swap Red and Blue Transformer wires for 208V operation. 2 – Class 2 Transformers 3 – Unit Requires Dual Feed Power
4 – ABC Acc outp ut is cyc led with the lead co mpre ssor.
5 – The reversing valve will be energized for c ooling mode.
6 – Ex ternal load and sour ce pumps must be exter nally fus ed.
Notes
1 – Swap Red and Blue Transformer wires for 208V operation. 2 – Class 2 Transformers 3 – Unit Requires Dual Feed Power
4 – ABC Acc outp ut is cyc led with the lead co mpre ssor.
5 – The reversing valve will be energized for c ooling mode.
6 – Ex ternal load and sour ce pumps must be exter nally fus ed.
24V
Tra nsf orme r
24V
Tra nsf orme r
Red
208V NOTE 1
PB1
2
3
1
2
3
1
PB1
2
3
1
Cap A
Compressor B
C
R
SC
R
S
Unit Power Supply #2
208-230/60/1
GL1L1 L2L2
Unit Power Supply #2
208-230/60/1
GL1 L2
CCB
L1L2
T1T2 CCB
L1L2
T1T2
Black
Blue
Tan (25B)
10AWG Red
Cap B
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NET RS485 NET
P6
RS485 E XP
P3
SW2
On
Reheat/Normal
L Output Type
CC – Dual/Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Tes t Mode
F1
-
3
A
P1/P9
C
PWM
1 2 3 4 5 6 7 8
ALM
ALG
ACCCOM ACCNO ACCNC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Faul t
LED1
R
Status
LED3
Config
LED2
CC2 CC FCR F FG CC CCGCC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-A)
K1-RV Relay
K2-CC Rel ay
K3-CC2 Rel ay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
White (16) 12AWG
Bl ac k ( 1 7) 1 2 A WG
Blue
Black
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NET RS485 NET
P6
RS485 E XP
P3
SW2
On
Reheat/Normal
L Output Type
CC – Dual/Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Tes t Mode
F1-
3A
P1/P9
C
PWM
1 2 3 4 5 6 7
8
ALM
ALG
ACCCOM ACCNO ACCNC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Fau l t
LED1
R
Status
LED3
Config
LED2
CC2 CC FCR F FG CC CCGCC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-B)
K1-RV Relay
K2-CC Rel ay
K3-CC2 Rel ay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
Yello w
Bl ac k/Wh ite
Bl ack (4 )
Red (3)
Bl ack (2 )
Red (1)
TB
ES
Emerg Sh utd own
LSLo ad S he d
LO 1Lo ckout Circuit A
R24VAC
C24VAC Common
ORev ersing V alve
GFan
Y1Com pr esso r A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lo ck out Ci rcu it B
Y2Com pr esso r B
TB
ES
Emerg Sh utd own
LSLo ad S he d
LO 1Lockout Circ uit A
R24VAC
C24VAC Common
ORev ersing V alve
GFan
Y1Com pr esso r A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lo ck out Ci rcu it B
Y2Com pr esso r B
Class 2
Bl a ck ( E S1)
Bl a ck ( E S2)
Bl a ck ( LS 1)
Bl a ck ( LS 2)
Bl a ck (L O1 )
RVARVA
HPALPA
TT
FD1-ARVA
TT
FD2-A
RVBRVB
HPBLPB
TT
RVB
TT
To AXB-A
To AXB-B
Bl a ck (L O2 )
Bl a ck (R )
Bl a ck (C )
Bl a ck (O 1)
Bl a ck (O 2)
Bl a ck ( Y 1)
Black (Y2)
Or a n ge ( 6 0)
CCACCA
Violet(18)
Viole t (19 )
CCBCCB
Vi/Wh(20)
Vi/Wh(21)
Orange (61)
Gr/Yl (5) GN D
Wh
Yellow(62)
Yello w (63 )
Gray (64)
Gray (65)
Bl ue (6 6)
Bl ue (6 7)
Bl ac k ( 6 8)
Bl ac k ( 6 9)
Orange /White (70)
Orange /White (71)
Yellow/White (72)
Yellow/White (73)
Gray/White (74)
Gray/White (75)
Blue/White (76)
Blue/White (77)
Black/White ( 78)
Black/White ( 79)
Capacitor
CT A
Compressor
Com mo n CT
A
Capacitor
CT B
Compressor
Com mo n CT
B
Source
Pump
CT
Load
Pump
CT
FD1-B FD2-B NOTE 2
Note 4
Note 4
NOTE 5
NOTE 5

15
NDW INSTALLATION MANUAL
Wiring Schematics cont.
208-230/60/1 Supply Power HydroZone continued
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-A
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-A
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-B
SW1
Mo dbu s A dd.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOU T+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-B
SW1
Mo dbu s A dd.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOU T+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
CCPCCP
Black (22)
White (23)
White (24)
TT
White (81)
White (80)
TT
Purple (82)
Purple (83)
TT
White/Tan (8 5)
White/Tan (8 4)
TT
Purple/White ( 86)
Purple/White (87)
TT
Br own ( 88 )
Br own ( 89)
TT
Br ow n /W hi t e (9 0)
Br ow n /W hi t e (9 1)
To ABC-B P6
To ABC-A P 6
Pump
Contactor
RedRed
Red (104)
White ( 103)
Black (102)
Disch
Pr ess ur e B
RedRed
Red (98)
Whit e (97)
Black (96)
Disch
Pr ess ur e A
RedRed
Red (99)
White ( 100)
Black (101)
Suct
Pr ess ur e A
RedRed
Red (105)
White (106)
Black (107)
Suct
Pr ess ur e B
TT
Bl ue ( 9 3)
Bl ue ( 9 2)
SCT A
TT
Blue/Wh (95)
Blue/Wh (94)
SCT B
Blue(26)
Blue(27)
Red (28)
Red (29)
Black
Black
Bro wn
Bro wn
B lue /W hite ( 30)
Blue/White (31)
Red/White (32)
Red/White (33)
Capacitor
CT A
Compressor
Com mon CT A
Aux
Heat Ct
Load P ump
CT
Black
Black
Bro wn
Bro wn
Source Pump
CT
Aux 2
CT
Capacitor
CT B
Compressor
Com mon CT
B
Blue/White (45)
Pi nk / Whi t e ( 4 6)
Yellow/White (47)
Purple/White ( 48 )
Bl ue ( 4 9)
Pink (50)
Yello w (51 )
Purple (52)
Load Flow Switch
F il e d I n st al l e d
Sou rce Flow S wi tch
F il e d I n st al l e d
EST LST
ELT LLT
LLT - A
LLT - B
HydroZone Controller Wiring
OAT Sensor
GeoTank Sensor
OAT
OAT
Tank
Tank
Red (G ND)
Red (T S)
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
R C
O/B
P V
C1 C2 C3 C4
--
R C
O/B
P V
C1 C2 C3 C4
--
TB
ES Emerg Sh utd own
LS Lo ad S he d
LO 1
Lo ck out Ci rc uit A
R24VAC
C
24VAC Comm on
ORev ersing V alve
GFan
Y1
Com pr essor A
WElectric Heat
DH
DehumidiĮcaƟon
LO 2 Lo ck out Ci rc uit B
Y2 Compressor B
Class 2
TB
ES Emerg Sh utd own
LS Lo ad S he d
LO 1
Lo ck out Ci rc uit A
R24VAC
C
24VAC Comm on
ORev ersing V alve
GFan
Y1
Com pr essor A
WElectric Heat
DH
DehumidiĮcaƟon
LO 2 Lo ck out Ci rc uit B
Y2 Compressor B
Class 2
HydroZone Controller Wiring
OAT Sensor
GeoTank Sensor
OAT
OAT
Tank
Tank
Red (G ND)
Red (T S)
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
R C
O/B
P V
C1 C2 C3 C4
--
TB
ES Emerg Sh utd own
LS Lo ad S he d
LO 1
Lo ck out Ci rc uit A
R24VAC
C
24VAC Comm on
ORev ersing V alve
GFan
Y1
Com pr essor A
WElectric Heat
DH
DehumidiĮcaƟon
LO 2 Lo ck out Ci rc uit B
Y2 Compressor B
Class 2
LegendLegend
Factory Low V oltage Wirin g
Field L ow Voltage Wiring
1234567812345678 RJ 45 Conn e ctor
Legend
Factory Low V oltage Wirin g
Field L ow Voltage Wiring
12345678 RJ 45 C onn ect or
DESCRIPTION SW2-4 SW2-5
Not Used ON ON
Cycle with Compressor OFF OFF
Water Valve Slow Openi
n
ON OFF
Not Used OFF ON
AXB SW2 Accessory Relay
Mo dbu s A dd .
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
Mo dbu s A dd .
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
SW 1
1 2 3 4 5
SW 1
1 2 3 4 5
SW 1
1 2 3 4 5
ONOFF ONOFF
SW 1
1 2 3 4 5
ONOFF
Mo dbu s A dd .
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
SW 1
1 2 3 4 5
ONOFF
3 – Ac c2 o u tp ut i s cy cled w i th the le ad co mpre sso r
NotesNotes
1 – If no flowswitch is being used on the load side, wires connected to HA-1 need to be jumpered.Connect Purple and Yel low wire together. 2 – If no fl ow switc h is being used on the sourc e side, w ires connected to
HA-2need to be jumpered. Connect Pink and Blue wire together.
Notes
1 – If no flowswitch is being used on the load side, wires connected to HA-1 need to be jumpered.Connect Purple and Yel low wire together. 2 – If no fl ow switc h is being used on the sourc e side, w ires connected to
HA-2need to be jumpered. Connect Pink and Blue wire together.
Note 3
Note 3
Note 1
Note 2
Red/White (33)
Black
Black
Bro wn
Bro wn

16
NDW INSTALLATION MANUAL
Wiring Schematics cont.
208-230/60/1 with Soft Start Option and HydroZone
24V
Tra nsf orme r
24V
Tra nsf orme r
Red
208V NOTE 1
Ground
LegendLegend
CC – Compressor Contactor CɌ– Cur rent Transducer
ELT – Entering Load Tem p
ES – Em er ge n cy Sh u td o w n EST – Enter ing S ource Temp
HP – High Pressu re LFS – Load Flow Switch
LLT – Leaving Load Temp
LP – Low Pressure LST – Leaving Source Temp L-WCT – LoadW ater Coil Temp
PB – Po wer B lo ck RV – Reversing Valve
SFS – Source Flow Switch S-WCT – Source Water Coi l Temp
TB – Terminal Board
F a ct or y lo w v ol t ag e w ir in g
Factory li ne volta ge wiring
Field low voltage wiring
Fie ld li ne vo lta ge wiri ng
Optional block
Field Supplied Option
Thermistor
Relay coil
T
¼” Quick Connector
Compressor A C
R
SC
R
S
Soft Start
Run Winding
Active
Start Wind ing
Common Winding
Soft Start
Run Winding
Active
Start Wind ing
Common Winding
Unit Power Supply #1
208-230/60/1
GL1L1 L2L2
Unit Power Supply #1
208-230/60/1
GL1 L2
Black
Pink
CCA
L1L2
T1T2 CCA
L1L2
T1T2
Black
Blue
Tan (25A)
10AWG
Blue
Red
CCP
L1L2
T1
T2 CCP
L1L2
T1
T2
G
Load
Pump
G
External
Source
Pump
NOTE 6
NotesNotes
1 – Swap Red and Blue Transformer wi res for 208V operation. 2 – Class 2 Transformers
3 – Unit Requires Dual Feed Power
4 – AB C A cc outp ut is cyc led with the le ad compressor.
5 – The reversing valve will be energized for cooling mode. 6 – External load and sour ce pumps must be exter nally fused.
Notes
1 – Swap Red and Blue Transformer wi res for 208V operation. 2 – Class 2 Transformers
3 – Unit Requires Dual Feed Power
4 – AB C A cc outp ut is cyc led with the le ad compressor.
5 – The reversing valve will be energized for cooling mode. 6 – External load and sour ce pumps must be exter nally fused.
24V
Tra nsf orme r
24V
Tra nsf orme r
Red
208V NOTE 1
PB1
2
3
1
2
3
1
PB1
2
3
1
Cap A
Compressor B
C
R
SC
R
S
Soft Start
Run Winding
Active
Start Wind ing
Common Winding
Soft Start
Run Winding
Active
Start Wind ing
Common Winding
Unit Power Supply #2
208-230/60/1
GL1L1 L2L2
Unit Power Supply #2
208-230/60/1
GL1 L2
Pink
CCB
L1L2
T1T2 CCB
L1L2
T1T2
Black
Blue
Tan (25B)
10AWG Blue
Red
Cap B
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NET RS485 NET
P6
RS485EXP
P3
SW2
On
Reheat/Normal
L Output Type
CC – Dual/Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Tes t Mode
F1
-
3
A
P1/P9
C
PWM
1 2 3 4 5 6 7 8
ALM
ALG
ACCCOM ACCNO ACCNC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Fau l t
LED1
R
Status
LED3
Config
LED2
CC2 CC FCRFFGCCCCG
CC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-A)
K1-RV Relay
K2-CC Rel ay
K3-CC2 Rel ay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
Note 4
White (16) 12AWG
Bl ac k ( 1 7) 1 2 A WG
Blue
Black
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NET RS485 NET
P6
RS485EXP
P3
SW2
On
Reheat/Normal
L Output Type
CC – Dual/Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Tes t Mode
F1-
3A
P1/P9
C
PWM
1 2 3 4 5 6 7
8
ALM
ALG
ACCCOM ACCNO ACCNC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Fau l t
LED1
R
Status
LED3
Config
LED2
CC2 CC FCRFFGCCCCG
CC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-B)
K1-RV Relay
K2-CCRelay
K3-CC2 Rel ay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
Yello w
Bl ac k/Wh ite
Bl ack (4 )
Red (3)
Bl ack (2 )
Red (1)
TB
ES
Emerg Sh utd own
LSLo ad S hed
LO 1Lo ckout Circuit A
R24VAC
C24VAC Common
OReversing V alve
GFan
Y1Com pr essor A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lo ckout Circuit B
Y2Com pr essor B
TB
ES
Emerg Sh utd own
LSLo ad S hed
LO 1Lo ckout Circuit A
R24VAC
C24VAC Common
OReversing V alve
GFan
Y1Com pr essor A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lo ckout Circuit B
Y2Com pr essor B
Class 2
Bl a ck ( E S1)
Bl a ck ( E S2)
Bl a ck ( LS 1)
Bl a ck ( LS 2)
Bl a ck (L O1 )
RVARVA
HPALPA
TT
FD1-ARVA
TT
FD2-A
RVBRVB
HPBLPB
TT
RVB
TT
To AXB-A
To AXB-B
Bl a ck (L O2 )
Bl a ck (R )
Bl a ck (C )
Bl a ck (O 1)
Bl a ck (O 2)
Black (Y1)
Black (Y2)
Orange (60)
CCACCA
Violet(18)
Violet(19)
CCBCCB
Vi/Wh(20)
Vi/Wh(21)
Orange (61)
Gr/Yl (5) GND
Wh
Yellow(62)
Yello w (63 )
Gray (64)
Gray (65)
Bl ue (6 6)
Blue (67)
Bl ac k ( 6 8)
Bl ac k ( 6 9)
Orange/White(70)
Orange/White(71)
Yellow/White (72)
Yellow/White (73)
Gray/White (74)
Gray/White (75)
Blue/White (76)
Blue/White (77)
Black/White ( 78)
Bl ac k/Wh ite ( 79 )
Capacitor
CT A
Compressor
Com mo n CT
A
Capacitor
CT B
Compressor
Com mo n CT
B
Source
Pump
CT
Load
Pump
CT
FD1-B FD2-B NOTE 2
Note 4
NOTE 5
NOTE 5

17
NDW INSTALLATION MANUAL
208-230/60/1 Supply Power with HydroZone continued
Wiring Schematics cont.
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-A
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-A
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-B
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1
LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17
P18
P15
(Aurora Expansion Board)
AXB-B
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 1
3
CCPCCP
Black (22)
White (23)
White (24)
TT
White (81)
White (80)
TT
Purple (82)
Purple (83)
TT
White/Tan (85)
White/Tan (84)
TT
Purple/White ( 86)
Purple/White (87)
TT
Br own ( 88 )
Br own ( 89)
TT
Br ow n /W hi t e (9 0)
Br ow n /W hi t e (9 1)
To ABC-B P6
To ABC-A P6
Pump
Contactor
RedRed
Red (104)
White ( 103)
Black (102)
Disch
Pr ess ur e B
RedRed
Red (98)
Whit e (97)
Black (96)
Disch
Pr ess ur e A
RedRed
Red (99)
White ( 100)
Black (101)
Suct
Pr ess ur e A
RedRed
Red (105)
Whit e (106)
Black (107)
Suct
Pr ess ur e B
TT
Bl ue ( 9 3)
Bl ue ( 9 2)
SCT A
TT
Blue/Wh (95)
Blue/Wh (94)
SCT B
Blue(26)
Blue(27)
Red (28)
Red (29)
Black
Black
Bro wn
Bro wn
B lue /W hite ( 30)
B lue /W hite ( 31)
Red/White (32)
Red/White (33)
Capacitor
CT A
Compressor
Common CT A
Aux
Heat Ct
Load P ump
CT
Black
Black
Bro wn
Bro wn
Source Pump
CT
Aux 2
CT
Capacitor
CT B
Compressor
Com mon CT
B
Blue/White (45)
Pink /White (46)
Yellow/White (47)
Purple/White ( 48 )
Bl ue ( 4 9)
Pink (50)
Yellow (51)
Purple (52)
Load Flow Switch
Filed In stalled
Source Flow Switch
F il e d I n st al l e d
EST LST
ELT LLT
LLT - A
LLT - B
HydroZone Controller Wiring
OAT Sensor
GeoTank Sensor
OAT
OAT
Tank
Tank
Red (G ND)
Red (T S)
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
R C
O/B
P V
C1 C2 C3 C4
--
R C
O/B
P V
C1 C2 C3 C4
--
TB
ES Emerg Sh utd own
LS Lo ad S he d
LO 1 Lo ckout Circuit A
R24VAC
C24VAC Comm on
ORev ersing V alve
GFan
Y1 Com pr essor A
WElectric Heat
DH DehumidiĮcaƟon
LO 2 Lo ckout Circuit B
Y2 Com pressor B
Class 2
TB
ES Emerg Sh utd own
LS Lo ad S he d
LO 1 Lo ckout Circuit A
R24VAC
C24VAC Comm on
ORev ersing V alve
GFan
Y1 Com pr essor A
WElectric Heat
DH DehumidiĮcaƟon
LO 2 Lo ckout Circuit B
Y2 Com pressor B
Class 2
HydroZone Controller Wiring
OAT Sensor
GeoTank Sensor
OAT
OAT
Tank
Tank
Red (G ND)
Red (T S)
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
R C
O/B
P V
C1 C2 C3 C4
--
TB
ES Emerg Sh utd own
LS Lo ad S he d
LO 1 Lo ckout Circuit A
R24VAC
C24VAC Comm on
ORev ersing V alve
GFan
Y1 Com pr essor A
WElectric Heat
DH DehumidiĮcaƟon
LO 2 Lo ckout Circuit B
Y2 Com pressor B
Class 2
LegendLegend
Factory Low V oltage Wirin g
Field Low Voltage Wiring
1234567812345678 RJ 45 Co nn ect or
Legend
Factory Low V oltage Wirin g
Field Low Voltage Wiring
12345678 RJ 45 Co nn ect or
DESCRIPTION SW2-4 SW2-5
Not Used ON ON Cycle with Compressor OFF OFF
Water Valve Slow Openi
n
ON OFF
Not Used OFF ON
AXB SW2 Accessory Relay
Modbus Add.
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
Modbus Add.
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
SW 1
1 2 3 4 5
SW 1
1 2 3 4 5
SW 1
1 2 3 4 5
ONOFF ONOFF
SW 1
1 2 3 4 5
ONOFF
Modbus Add.
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
SW 1
1 2 3 4 5
ONOFF
3 – Acc2outputis cycled with the lead compressor
NotesNotes
1 – If no flowswitch is being used on the load side, wires connected to HA-1 need to be jumpered. Connect Purpl e and Yel low wire together. 2 – If no flowswitch is being used on the source side, wires connected to
HA-2need to bejumpered.Connect Pink and Blue wire together.
Notes
1 – If no flowswitch is being used on the load side, wires connected to HA-1 need to be jumpered. Connect Purpl e and Yel low wire together. 2 – If no flowswitch is being used on the source side, wires connected to
HA-2need to bejumpered.Connect Pink and Blue wire together.
Note 3
Note 3
Note 1
Note 2
Red/White (33)
Black
Black
Bro wn
Bro wn

18
NDW INSTALLATION MANUAL
3PH Supply Power with HydroZone
Wiring Schematics cont.
24V
Tra nsf orme r
24V
Tra nsf orme r
Red
208V NOTE 1
24V
Tra nsf orme r
24V
Tra nsf orme r
Red
208V NOTE 1
PB1
2
3
1
2
3
1
PB1
2
3
1
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NET RS485 NE T
P6
RS485 E XP
P3
SW2
On
Reheat/Normal
L Output Type
CC – Dual/ Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Test Mode
F1
-
3
A
P1/P9
C
PWM
1 2 3 4 5 6 7 8
ALM
ALG
ACCCOM ACCNO ACCNC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Fau l t
LED1
R
Status
LED3
Config
LED2
CC2 CC FCR F FG CC CCGCC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-A)
K1-RV Relay
K2-CCRelay
K3-CC2 Rel ay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NET RS485 NE T
P6
RS485 E XP
P3
SW2
On
Reheat/Normal
L Output Type
CC – Dual/ Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Tes t Mode
F1-
3A
P1/P9
C
PWM
1 2 3 4 5 6 7
8
ALM
ALG
ACCCOM ACCNO ACCNC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Fault
LED1
R
Status
LED3
Config
LED2
CC2 CC FCR F FG CC CCGCC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-B)
K1-RV Relay
K2-CCRelay
K3-CC2 Relay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
Yello w
Bl ac k/Wh ite
Bl ac k ( 4)
Red (3)
Bl ac k ( 2)
Red (1)
TB
ES
Emerg Sh utd own
LSLo ad S he d
LO 1Lock ou t Ci rc uit A
R24VAC
C24VAC Common
ORev ersing V alve
GFan
Y1Com pr esso r A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lockout Circ uit B
Y2Com pr esso r B
TB
ES
Emerg Sh utd own
LSLo ad S he d
LO 1Lo ck out Ci rcu it A
R24VAC
C24VAC Common
ORev ersing V alve
GFan
Y1Com pr esso r A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lockout Circ uit B
Y2Com pr esso r B
Cla ss 2
Bl a ck ( E S1)
Bl a ck ( E S2)
Bl a ck ( LS 1)
Bl a ck ( LS 2)
Bl a ck (L O1 )
RVARVA
HPALPA
TT
FD1-ARV A
TT
FD2-A
RVBRVB
HPBLPB
TT
RVB
TT
To AXB-A
To AXB-B
Bl a ck (L O2 )
Bl a ck (R )
Bl a ck (C )
Bl a ck (O 1)
Bl a ck (O 2)
Black (Y1)
Bl a ck ( Y 2)
Orange (60)
CCACCA
Viole t (18 )
Viole t (19 )
CCBCCB
Vi/W h (20)
Vi/W h (21)
Orange (61)
Gr/Yl (5) GND
Wh
Yello w (62 )
Yello w (63 )
Gray (64)
Gray (65)
Blue (66)
Blue (67)
Bl ac k ( 6 8)
Bl ac k ( 6 9)
Oran ge/White (70)
Oran ge/White (71)
Yellow/White (72)
Yellow/White (73)
Gray/White (74)
Gray/White (75)
Blue/White (76)
Blue/White (77)
Blac k/White ( 78)
Bl ac k/Wh ite ( 79 )
FD1-B FD2-B
Compressor A
T1
T2
T3 T1
T2
T3
Black A1
Red A3
White A2
Compressor B
T1
T2
T3 T1
T2
T3
L3 L2 L1
T3 T2 T1
Power
Distribution Block
Unit Power Supply
Line Voltage
G
L3 L2 L1
T3 T2 T1
Power
Distribution Block
Unit Power Supply
Line Voltage
GRed
Yellow
Black
CCA
T1
L1
T2
L2
T3
L3
CCA
T1
L1
T2
L2
T3
L3
Black B1
Red B3
White B2
Red
Yellow
Black
CCB
T1
L1
T2
L2
T3
L3
CCB
T1
L1
T2
L2
T3
L3
Ground
LegendLegend
CC – Compressor Contactor CɌ– Current Transducer
ELT – Enter ing Load Tem p
ES – Em er ge ncy Shu tdo wn ES T – En t er ing S our ce Te mp
HP – High Pressure LFS – Load Flow Switc h
LLT – Leaving Load Temp
LP – Low Pressure
LST – Leaving Source Temp
L-WCT – L oad W ate r Coil Temp
PB – Po wer B lo ck RV – Rev ersing Valve SFS – So u rce Flo w S wit ch S-WCT – Source Water Coil Temp
TB – Terminal Board
Fa ctor y lo w v ol tage w ir ing
Fa ctor y li ne volt age wi ring
Field low voltage wiring
Field line voltage wiring
Optional block
Field Supplied Option
Thermistor
Relay coil
T
¼” Quick Connector
NotesNotes
1 – Swap Red and Blue Transformer wi res for 208V operation. 208 -230/60/1 units only.
2 – Class 2 Transformer
3 – A c c ou t p ut i s c y cl ed w it h t h e l ea d c om p r es so r . 4 – The reversing valve will be energized for c ooling mode.
Notes
1 – Swap Red and Blue Transformer wi res for 208V operation. 208 -230/60/1 units only.
2 – Class 2 Transformer
3 – A c c ou t p ut i s c y cl ed w it h t h e l ea d c om p r es so r . 4 – The reversing valve will be energized for c ooling mode.
Note 2
Note 3
Note 3
Note 4
Note 4
SW1-4 SW1-5 DESCRI PTION
ON ON Not Used
OFF ON Cycles with CC (Normal)
ON OFF Not Use d
OFF OFF Not Used
AXB Accessory 2 DIP Settings
SW2
On
Fut u re U se
L Output Type
CC – Dual/Si ngle
Acc – Dip 5
Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F 1
2 3 4 5
6 7 8
Of f
SW2
On
Fut u re U se
L Output Type
CC – Dual/Si ngle
Acc – Dip 5
Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F 1
2 3 4 5
6 7 8
Of f
SW2
On
Fut u re U se
L Output Type
CC – Dual/Si ngle
Acc – Dip 5
Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F 1
2 3 4 5
6 7 8
Of f

19
NDW INSTALLATION MANUAL
Wiring Schematics cont.
3PH Supply Power with HydroZone continued
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1 LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17 P18 P15
(Aurora Expansion Board)
AXB-A
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 13
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1 LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17 P18 P15
(Aurora Expansion Board)
AXB-A
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 13HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1 LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17 P18 P15
(Aurora Expansion Board)
AXB-B
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 13
HW
P8
MOTOR
P6
RS485
P7
ZO NE
P9
ABC
STEPPER ANA ACC2 DH DIV
NO
COM
K6
NO
COM
K5
C R
L1 L1 L2 L2
P10 P5 P11
C R
(-)
(+)
C R
(-)
(+)
C R
(-)
(+)
P4 P2
K1
K2K3
HA2 HA1 SGI
LOOP VS DAT A VS PUMP PUMP SLAVE
P3
V+
C R
TX
RX
+5
P14
LLT
P1 LATFLO WLWTEWT
CT2
4 3
CT2
4 3
CT1
2 1
CT1
2 1
Status
G
DISCH
P16
P17 P18 P15
(Aurora Expansion Board)
AXB-B
SW1
Modbus Add.
ID
Future Use
1
2
3
4
5
ONOFF
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
S+5C CC21 INOUT+5S
SCT
2 13
HW
12
C
P12
SCP
2 13
TT
White (81)
White (80)
TT
Purple (82)
Purple (83)
TT
White/Tan (85)
White/Tan (84)
TT
Purple/White (86)
Purple/White ( 87)
TT
Br own ( 88)
Br own ( 89)
TT
Br ow n /W hi t e (9 0)
Br ow n /W hi t e (9 1)
To ABC-B P 6
To ABC-A P6
RedRed
Red (104)
White (103)
Black (102)
Disch
Pr ess ur e B
RedRed
Red (98)
White ( 97)
Black (96)
Disch
Pr ess ur e A
RedRed
Red (99)
White ( 100)
Black (101)
Suct
Pr ess ur e A
RedRed
Red (105)
Whit e (106)
Black (107)
Suct
Pr ess ur e B
TT Blue (93)
Bl ue ( 9 2)
SCT A
TT Blue/Wh (95)
Blue/Wh (94)
SCT B
Blue (26)
Blue(27)
Red (28)
Red (29)
Black
Black
Bro wn
Bro wn
B lue /W hite ( 30)
B lue /W hite ( 31)
Red/White (32)
Red/White (33)
Com p A T1
Com p A T2
Aux
Heat Ct
Load P ump
CT
Black
Black
Bro wn
Bro wn
Source Pump
CT
Aux 2
CT Com p B T1
Com p B T2
Blue/White (45)
Pink /White (46)
Yellow/White (47)
Purple/White ( 48)
Bl ue ( 4 9)
Pink (50)
Yello w (51 )
Purple (52)
Load Flow Switc h
F il e d I n s tal l e d
Sou rce Flow Switch
F il e d I n s tal le d
EST LST
ELT LLT
LLT - A
LLT - B
HydroZone Controller Wiring
OAT Sensor
GeoTank Sensor
OAT
OAT
Tank
Tank
Red (G ND)
Red (T S)
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
R C
O/B
P V
C1 C2 C3 C4
--
R C
O/B
P V
C1 C2 C3 C4
--
TB
ES Emerg Sh utd own
LS Lo ad S hed
LO 1 Lo ckout Circ uit A
R24VAC
C24VAC Common
ORev ersing V al ve
GFan
Y1 Com pr essor A
WElectric Heat
DH DehumidiĮcaƟon
LO 2 Lockout Circuit B
Y2 Com pressor B
Class 2
TB
ES Emerg Sh utd own
LS Lo ad S hed
LO 1 Lo ckout Circ uit A
R24VAC
C24VAC Common
ORev ersing V al ve
GFan
Y1 Com pr essor A
WElectric Heat
DH DehumidiĮcaƟon
LO 2 Lockout Circuit B
Y2 Com pressor B
Class 2
HydroZone Controller Wiring
OAT Sensor
GeoTank Sensor
OAT
OAT
Tank
Tank
Red (G ND)
Red (T S)
HydroZone
HZ0
Controller
GND
TS
OAT
GND
-
+
HZC
R C
O/B
P V
C1 C2 C3 C4
--
TB
ES Emerg Sh utd own
LS Lo ad S hed
LO 1 Lo ckout Circ uit A
R24VAC
C24VAC Common
ORev ersing V al ve
GFan
Y1 Com pr essor A
WElectric Heat
DH DehumidiĮcaƟon
LO 2 Lockout Circuit B
Y2 Com pressor B
Class 2
LegendLegend
Factory Low V oltage Wiring Field Low Voltage Wiring
1234567812345678 RJ 45 Conn e ctor
Legend
Factory Low V oltage Wiring Field Low Voltage Wiring
12345678 RJ 45 Conn ect or
Modbus Add.
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
Modbus Add.
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
SW 1
1 2 3 4 5
SW 1
1 2 3 4 5
SW 1
1 2 3 4 5
ONOFF ONOFF
SW 1
1 2 3 4 5
ONOFF
Modbus Add.
ID
Future Use
Future Use
Ac c 2 – D ip 1
Ac c 2 – D ip 2
SW 1
1 2 3 4 5
ONOFF
NotesNotes
1 – I f n o fl o w sw i tc h i s be in g us ed on t he lo ad s i de , wi r e s c o nn e ct ed t o
HA-1 need to be jumpered.Connect Purple and Yellow wire together.
2 – Ifno flowswitch is being used on the source side, wires connected to
HA-2 need to be jumpered. Connect Pin k and Blue wire togethe r.
Notes
1 – I f n o fl o w sw i tc h i s be in g us ed on t he lo ad s i de , wi r e s c o nn e ct ed t o
HA-1 need to be jumpered.Connect Purple and Yellow wire together.
2 – Ifno flowswitch is being used on the source side, wires connected to
HA-2 need to be jumpered. Connect Pin k and Blue wire togethe r.
DESCRIPTION SW2-4 SW2-5
Not Used ON ON Cycle with Compressor OFF OFF
Water Valve Slow Openi
n
ON OFF
Not Used OFF ON
AXB SW2 Accessory Relay
Note 2
Note 1

20
NDW INSTALLATION MANUAL
Wiring Schematics cont.
100-180 208-230/60/1 with HydroLink
24V
Tra nsf orme r
24V
Tra nsf orme r
PB2
2
3
1
2
3
1
PB2
2
3
1
Red
208V NOTE 1
Ground
LegendLegend
CC – Compressor Contactor CɌ– Cur rent Transducer
ELT – Entering Load Tem p
ES – Em erge nc y Sh utd ow n ES T – En ter in g S ource T emp
HP – High Pressure LFS – Load Flow Switch
LLT – Leaving Load Temp
LP – Low Pressure
LST – Leaving Source Temp
L-WCT – LoadW ater Coi l Temp
PB – Po wer B lo ck RV – Rev ersing Valve SFS – So u rce Flo w S wi t ch
S-WCT – Source Water Coi l Temp
TB – Terminal Boa rd
Fa ctor y lo w v ol tage w irin g
Fa ctor y line volt age wi ring
Field low voltage wiring
F ie l d li n e v ol ta g e w iri ng
Optional block
Field Supplied Option
Thermistor
Relay coil
T
¼” Quick Connector
Compressor A C
R
SC
R
S
Unit Power Supply #1
208-230/60/1
GL1L1 L2L2
Unit Power Supply #1
208-230/60/1
GL1 L2
CCA
L1L2
T1T2 CCA
L1L2
T1T2
Black
Blue
Tan (25A)
10AWG Red
CCP
L1L2
T1
T2 CCP
L1L2
T1
T2
G
Load
Pump
G
External
Source
Pump
NOTE 5
24V
Tra nsf orme r
24V
Tra nsf orme r
Red
208V NOTE 1
PB1
2
3
1
2
3
1
PB1
2
3
1
Cap A
Compressor B
C
R
SC
R
S
Unit Power Supply #2
208-230/60/1
GL1L1 L2L2
Unit Power Supply #2
208-230/60/1
GL1 L2
CCB
L1L2
T1T2 CCB
L1L2
T1T2
Black
Blue
Tan (25 B)
10AWG Red
Cap B
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NE T RS485 NET
P6
RS485 E XP
P3
SW2
On
Reheat/Normal
L Ou tpu t T y p e
CC – Dual/ Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Tes t Mode
F1
-
3
A
P1/P9
C
PWM
1 2 3 4 5 6 7 8
ALM
ALG
ACC COM ACC NO ACC NC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Fault
LED1
R
Status
LED3
Config
LED2
CC2 CC FCR F FG CC CCGCC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-A)
K1-RV Relay
K2-CCRelay
K3-CC2Relay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
Interface
24VDC
-GLAN
+
Interface
24VDC
-GLAN
+
123412345
12341234 5
EEV 1 EEV 2
P2
24V
GND
P1 P4 P3
J7
+5 V
GND GND
+2 4V
P5
C R5AMP
USB
123412345
12341234 5
EEV 1 EEV 2
P2
24V
GND
P1 P4 P3
J7
+5 V
GND GND
+2 4V
P5
C R5AMP
USB
White (16) 12AWG
Bl ac k ( 1 7) 1 2 A W G
Blue
Black
CFM
P13
P4
SW1
P5
JW2
P9
LO O/ B Y2 W DH
P8 P7
RS485 NE T RS485 NET
P6
RS485 E XP
P3
SW2
On
Reheat/Normal
L Output Type
CC – Dual/ Si ngle
Acc – Dip 5 Acc – Dip 4
RV – B/O
FP2 – 15°F/30°F
FP1 – 15°F/30°F
Com1
LED5
Com2
LED5
Tes t Mode
F1-
3A
P1/P9
C
PWM
1 2 3 4 5 6 7
8
ALM
ALG
ACC COM ACC NO ACC NC R C
G
Y1
EH2CEH1
C
CO
CR-+C R-+
Of f
Faul t
LED1
R
Status
LED3
Config
LED2
CC2 CC FCR F FG CC CCGCC2
HI
CC2
LO
CC2
GREVREV FP1 FP1 FP2 FP2 LPS LPSHPSHPS
Aurora Base Control A
(ABC-B)
K1-RV Relay
K2-CC Rel ay
K3-CC2 Rel ay
K4-Fan Relay
K5-Alarm
Relay
K6-Acc
Relay
F
R C
CCGY1
C
R
ES LS
P2
EH1
YY
GG GG
GGG
Yello w
Bl ac k/Wh ite
Bl ack (4 )
Red (3)
Bl ack (2 )
Red (1)
Red (6)
Bl ack (7 )
Bl ac k ( 9)
Red (8)
TB
ES
Emerg Sh utd own
LSLo ad S hed
LO 1Lo ck out Ci rc ui t A
R24V AC
C24V AC C ommon
ORe versing Va lve
GFan
Y1Com pr essor A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lo ckout Circuit B
Y2Com pr essor B
TB
ES
Emerg Sh utd own
LSLo ad S hed
LO 1Lo ck out Ci rc ui t A
R24V AC
C24V AC C ommon
ORe versing Va lve
GFan
Y1Com pr essor A
WElectric Heat
DHDehumidiĮcaƟon
LO 2Lo ckout Circuit B
Y2Com pr essor B
Cla ss 2
Bl a ck ( E S1)
Bl a ck ( E S2)
Bl a ck ( LS 1)
Bl a ck ( LS 2)
Bl a ck (L O1 )
RVARVA
HPALPA
TT
FD1-ARV A
TT
FD2-A
RVBRV B
HPBLPB
TT
RVB
TT
To AXB-A
To AXB-B
Bl a ck (L O2 )
Bl a ck (R )
Bl a ck (C )
Bl a ck (O 1)
Bl a ck (O 2)
Bl a ck ( Y 1)
Bl a ck ( Y 2)
Orange (60)
CCACCA
Violet(18)
Violet(19)
CCBCCB
Vi/W h (20)
Vi/W h (21)
Orange (61)
Red (12)
Bl ac k ( 1 3)
Gr/Yl (5) GND
GND
Gr/Yl (10)
Green/Yellow(14)
GND
GND
Gr/Yl (11)
Wh
Yellow(62)
Yellow(63)
Gray (64)
Gray (65)
Blue (66)
Blue (67)
Bl ac k ( 6 8)
Bl ac k ( 6 9)
Orange/White(70)
Orange/White(71)
Yellow/White (72)
Yellow/White (73)
Gray/White (74)
Gray/White (75)
Blue/White (76)
Blue/White (77)
Bl ac k/Wh ite ( 78 )
Black/White ( 79)
Capacitor
CT A
Compressor
Common CT
A
Capacitor
CT B
Compressor
Common CT
B
Source
Pump
CT
Load
Pump
CT
FD1-B FD2-B
Note 2
Note 3
Note 3
Note 4
Note 4
NotesNotes
1 – Swap Red and Blue Transformer wires for 208V operation. 2 – Class 2 Transformer 3 – Ac c ou t p ut is c yc l ed w it h t h e l ea d c om p res so r .
4 – Thereversing valve will beenergized for cooling mode.
5 – Ex ternal load and sour ce pumps must be exter nally fused.
Notes
1 – Swap Red and Blue Transformer wires for 208V operation. 2 – Class 2 Transformer 3 – Ac c ou t p ut is c yc l ed w it h t h e l ea d c om p res so r .
4 – Thereversing valve will beenergized for cooling mode.
5 – Ex ternal load and sour ce pumps must be exter nally fused.