Water Furnace Versatec Compact User manual

Commercial / to 6 Ton
Water Source/Geothermal Heat Pump
12
SPECIFICATION CATALOG
SPECIFICATION CATALOG

VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Table of Contents
Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
AHRI Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
The Versatec Compact Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
Inside the Versatec Compact Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-15
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-28
Application Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-31
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Installation Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-35
Vertical Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-37
Horizontal Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-39
Hanger Bracket Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Electrical Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43-45
Blower Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46-49
Selection Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-51
Reference Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Legend and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Correction Factor Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Performance Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-77
Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78-92
Engineering Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93-95
Revision Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

4
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Model Nomenclature
Note: See separate manual for economizer option
UB
U
B
1-2 3 4-6 7 8 9
Model Type
UB – Versatec Compact
Cabinet Configuration
V – Vertical
H - Horizontal
Unit Capacity (MBTUH)
006, 009, 012, 015,
018, 024, 030, 036,
0414(Vertical)
042, 048, 060, 070
Discharge Configuration
T – Top (Vertical)
E – End (Horizontal)
S – Side (Horizontal)
Return Air Configuration
L – Left
R – Right
Voltage
0 – 208-230/60/1
2 – 265-277/60/1 (006-036)
3 – 208-230/60/3 (024-070)
4 – 460/60/3 (024-070)
5 – 575/60/3 (PSC Only 042-070)
9 – 115/60/1 (006-012)
Refrigeration Option
0 – None
Bl owe r Mo tor Opt io ns
0 – PSC Blower
1 – Variable Speed ECM Blower (015-070)
4 – 5-Speed ECM Blower (015-070)
6 – Variable Speed Constant Torque ECM Blower (006-012)5
Water Coil Options
C – Copper
D – Insulated Copper
N – CuproNickel
P – Insulated CuproNickel
Sound Kit
A – None
B – Sound Kit (Not Available on UBH006-012)
Vintage
* - Factory UseOnly
Non-Standard Options
SS – Standard
DrainPan Option
0 – Composite, No Secondary Connection
1 – Composite, Secondary Connection
2 – Stainless Steel, No Secondary Connection
3 – Stainless Steel, Secondary Connection
Air Coil Option
3 – All-Aluminum, Uncoated
4 – All-Aluminum, AlumiSealTM
Filter Option
A – MERV 4
B – MERV 13
Cabinet Option
0 – Unpainted Cabinet, Filter Rail
1 – Painted Cabinet, Filter Rail
2 – Unpainted Cabinet, 4-Sided Filter Rack
3 – Painted Cabinet, 4-Sided Filter Rack
Electrical Options 1
N – No Phase Guard, No Disconnect
D – No Phase Guard, Disconnect
P – Phase Guard, No Disconnect
B – Phase Guard, Disconnect
Control Options2
A – AuroraTM Base Control (ABC)
E – AuroraTM UPCDDC Controller
F – AuroraTM UPCDDC Controller with LON
Water ControlOptions3
N – None
R – Water Flow Regulator (015-070)
V – 2-Way Valve (015-070)
B – 2-Way Valve w/ Water Flow Regulator (015-070)
W – Waterside Economizer
S – Waterside Economizer w/ Water Flow Regulator
E – Waterside Economizer w/ 2-Way Valve
C – Waterside Economizer w/ 2-WayValve &
Water Flow Regulator
10 11 12 14
V036 T L 0 0 0 C A N
13 A 15 N 16
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Note:
1 - Phase Guard Only Available on 208-230/60/3 and 460/60/3
2 - 50VA transformer with Aurora Base Control, and 75VA transformer with Aurora UPC control
3 - Waterside economizer option must be ordered with stainless steel drain pan and ei ther 5-speed
ECM or variable speed ECM (024-070)
4 – 2 way valve, water flow regulator, economizer, disconnect, 2" filter and filter rack not available in UBV041.
5 – Blower Motor option “6" only available in 115/60/1 and 208-230/60/1.

5
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
AHRI Data
All Versatec Compact Series product is safety listed under UL1995 thru ETL and performance
listed with AHRI in accordance with standard 13256-1.
PSC Motors
AHRI/ASHRAE/ISO 13256-1
English (IP) Units
Model
Flow Rate
Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump
Cooling
EWT 86°F
Heating
EWT 68°F
Cooling
EWT 59°F
Heating
EWT 50°F
Cooling
EWT 77°F
Heating
EWT 32°F
gpm cfm Capacity
Btuh
EER
Btuh/W
Capacity
Btuh COP Capacity Btuh
EER
Btuh/W
Capacity
Btuh COP Capacity Btuh
EER
Btuh/W
Capacity
Btuh COP
006 2.0 250 7,100 13.4 8,000 4.3 8,400 21.3 6,800 3.8 7,400 15.5 5,400 3.2
009 3.0 350 8,100 12.2 11,400 4.6 9,900 19.2 9,600 4.0 8,900 14.5 7,600 3.4
012 3.0 400 10,200 12.2 15,200 4.4 12,200 18.2 12,600 3.9 11,200 14.2 10,200 3.5
015 4.0 500 13,200 12.5 15,400 4.5 16,000 20.0 13,000 4.0 14,000 15.3 10,400 3.2
018 5.0 600 17,300 13.4 19,000 4.3 19,800 20.5 16,000 3.7 18,000 15.4 12,600 3.2
024 6.0 800 22,900 13.0 26,000 4.5 27,000 19.8 22,600 4.0 24,500 14.8 17,000 3.3
030 8.0 1000 28,400 13.8 34,000 4.5 33,500 21.0 28,000 4.0 30,000 16.0 21,000 3.3
036 9.0 1150 34,500 14.0 43,800 4.7 40,000 22.0 35,600 4.2 36,000 16.3 26,000 3.3
041 11.0 1100 37,600 13.5 48,000 4.3 44,500 20.4 38,500 3.8 40,000 15.0 28,500 3.2
042 11.0 1400 39,200 13.2 51,000 4.7 47,000 20.4 41,400 4.3 42,000 15.2 30,500 3.3
048 12.0 1600 47,200 13.0 59,000 4.6 57,000 19.8 48,000 4.0 49,500 15.0 36,500 3.3
060 15.0 1900 57,000 13.5 66,000 4.3 67,000 21.0 55,000 4.0 58,000 15.2 43,000 3.3
070 18.0 2100 66,000 14.0 80,000 4.5 75,000 20.5 64,000 4.0 68,000 15.6 49,000 3.3
8/9/18
Cooling capacities based upon 80.6°F DB, 66.2°F WB entering air temperature
Heating capacities based upon 68°F DB, 59°F WB entering air temperature
All ratings based upon 208V operation
Variable Speed ECM, 5 Speed ECM motor
AHRI/ASHRAE/ISO 13256-1
English (IP) Units
Model
Flow Rate
Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump
Cooling
EWT 86°F
Heating
EWT 68°F
Cooling
EWT 59°F
Heating
EWT 50°F
Cooling
EWT 77°F
Heating
EWT 32°F
gpm cfm Capacity
Btuh
EER Btu-
h/W
Capacity
Btuh COP Capacity Btuh
EER
Btuh/W
Capacity
Btuh COP Capacity Btuh
EER
Btuh/W
Capacity
Btuh COP
006 2.0 250 7,150 14.0 8,500 4.4 8,600 22.0 7,100 4.0 7,600 16.0 5,500 3.2
009 3.0 350 8,300 13.4 11,500 4.8 10,300 22.0 9,600 4.1 9,100 15.0 7,600 3.4
012 3.0 400 10,300 13.0 14,500 4.5 12,800 20.0 11,900 4.0 11,300 15.0 10,200 3.5
015 4.0 500 13,800 13.2 16,100 4.6 16,000 21.0 13,400 4.1 14,200 15.7 11,000 3.3
018 5.0 600 17,300 14.2 19,000 4.5 19,800 22.0 16,000 3.9 18,000 16.2 12,600 3.3
024 6.0 800 22,900 13.6 26,000 4.7 27,000 20.8 22,600 4.2 24,500 15.6 17,000 3.5
030 8.0 900 28,400 14.7 34,000 4.7 33,500 22.5 28,000 4.2 30,000 17.0 21,000 3.5
036 9.0 1150 34,500 14.5 43,800 4.9 40,000 23.0 35,600 4.4 36,000 17.0 26,000 3.5
041 11.0 1300 39,000 13.9 48,500 4.7 45,000 21.0 38,500 4.1 41,000 16.0 28,500 3.4
042 11.0 1400 39,200 14.2 51,000 4.9 47,000 22.0 41,400 4.5 42,000 16.6 30,500 3.5
048 12.0 1600 47,200 14.0 59,000 4.8 57,000 21.0 48,000 4.2 49,500 16.0 36,500 3.5
060 15.0 1900 57,000 14.0 66,000 4.6 67,000 22.0 55,000 4.2 58,000 16.0 43,000 3.5
070 18.0 2100 66,000 14.6 80,000 4.7 75,000 22.0 64,000 4.2 68,000 16.6 49,000 3.5
8/9/18
Cooling capacities based upon 80.6°F DB, 66.2°F WB entering air temperature
Heating capacities based upon 68°F DB, 59°F WB entering air temperature
All ratings based upon 208V operation

6
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
The performance standard AHRI/ASHRAE/ISO 13256-1 became effective January 1, 2000 and replaces AHRI Standards
320, 325, and 330. This new standard has three major categories: Water Loop (comparable to ARI 320), Ground Water (ARI
325), and Ground Loop (ARI 330). Although these standards are similar there are some differences:
Unit of Measure: The Cooling COP
The cooling efficiency is measured in EER (US version measured in Btu/h per Watt. The Metric version is measured in a
cooling COP (Watt per Watt) similar to the traditional COP measurement.
Water Conditions Differences
Entering water temperatures have changed to reflect the centigrade temperature scale. For instance the water loop
heating test is performed with 68°F (20°C) water rounded down from the old 70°F (21.1°C).
Air Conditions Differences
Entering air temperatures have also changed (rounded down) to reflect the centigrade temperature scale. For instance
the cooling tests are performed with 80.6°F (27°C) dry bulb and 66.2°F (19°C) wet bulb entering air instead of the
traditional 80°F (26.7°C) DB and 67°F (19.4°C) WB entering air temperatures. 80.6/66.2 data may be converted to
80/67 using the entering air correction table. This represents a significantly lower relative humidity than the old 80/67
of 50% and will result in lower latent capacities.
Pump Power Correction Calculation
Within each model, only one water flow rate is specified for all three groups and pumping Watts are calculated using
the following formula. This additional power is added onto the existing power consumption.
• Pump power correction = (gpm x 0.0631) x (Press Drop x 2990) / 300
Where ‘gpm’ is waterflow in gpm and ‘Press Drop’ is the pressure drop through the unit heat exchanger at rated water
flow in feet of head.
Blower Power Correction Calculation
Blower power is corrected to zero external static pressure using the following equation. The nominal airflow is rated
at a specific external static pressure. This effectively reduces the power consumption of the unit and increases cooling
capacity but decreases heating capacity. These Watts are significant enough in most cases to increase EER and COPs
fairly dramatically over ARI 320, 325, and 330 ratings.
• Blower Power Correction = (cfm x 0.472) x (esp x 249) / 300
Where ‘cfm’ is airflow in cfm and ‘esp’ is the external static pressure at rated airflow in inches of water gauge.
ISO Capacity and Efficiency Calculations
The following equations illustrate cooling calculations:
• ISO Cooling Capacity = Cooling Capacity (Btu/h) + (Blower Power Correction (Watts) x 3.412)
• ISO EER Efficiency (W/W) = ISO Cooling Capacity (Btu/h) x 3.412 / [Power Input (Watts) - Blower Power Correction
(Watts) + Pump Power Correction (Watt)]
The following equations illustrate heating calculations:
• ISO Heating Capacity = Heating Capacity (Btu/h) - (Blower Power Correction (Watts) x 3.412)
• ISO COP Efficiency (W/W) = ISO Heating Capacity (Btu/h) x 3.412 / [Power Input (Watts) - Blower Power Correction
(Watts) + Pump Power Correction (Watt)]
Comparison of Test Conditions
Conversions:
Airflow (lps) = cfm x 0.472; Water Flow (lps) = gpm x 0.0631;
esp (Pascals) = esp (in wg) x 249; Press Drop (Pascals) = Press Drop (ft hd) x 2990
AHRI Data cont.
ARI 320 ISO/AHRI 13256-1
WLHP ARI 325 ISO/AHRI
13256-1
GWHP ARI 330 ISO/AHRI
13256-1 GLHP
Cooling
Entering Air - DB/WB °F 80/67 80.6/66.2 80/67 80.6/66.2 80/67 80.6/66.2
Entering Water - °F 85 86 50/70 59 77 77
Fluid Flow Rate * ** ** ** ** **
Heating
Entering Air - DB/WB °F 70 68 70 68 70 68
Entering Water - °F 70 68 50/70 50 32 32
Fluid Flow Rate * ** ** ** ** **
Note *: Flow rate is set by 10°F rise in standard cooling test Note **: Flow rate is specified by the manufacturer
Part load entering water conditions not shown.
WLHP = Water Loop Heat Pump; GWHP = Ground Water Heat Pump; GLHP = Ground Loop Heat Pump

7
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
The Versatec Compact Series
Vertical Versatec Compact Series
Models UBV 006-070 (0.5-6 tons) Single Speed
Horizontal Versatec Compact Series
Models UBH 006-070 (0.5-6 tons) Single Speed
The Versatec Compact is the latest in WaterFurnace’s efforts to be the best in the water source heat pump industry. The
Versatec Compact raises the bar for boiler/tower applications by providing flexibility and efficiency into a compact cabinet at a
competitive price. A compact cabinet is important when choosing a replacement heat pump. Many water source heat pumps of
the 1980-90’s were relatively low efficiency models with a small footprint. Once they are installed in a building and piping and
ductwork is piped around the unit replacement with a larger footprint is nearly impossible. The Versatec Compact combines
the high efficiency of 21st century product in a footprint that matches a 1980 heat pump for easy replacement. The chart below
shows a comparison of a typical 1980 legacy wshp and current competitor data versus the Versatec Compact Series.
This full range product offers all the standard commercial voltages using high efficiency rotary and scroll compressors
along with either 3-speed permanent split-capacitor (PSC), 5-speed ECM, or variable speed ECM blower motors.
Versatec Compact Highlights
• High efficiency performance
- With PSC Blower Motor Up to 14.0 EER and 4.7 COP (ISO/AHRI 13256-1-WLHP)
- With Variable Speed ECM Blower Motor Up to 14.7 EER and 4.9 COP (ISO/AHRI 13256-1-WLHP)
- With 5-Speed ECM Blower Motor Up to 14.7 EER and 4.9 COP (ISO/AHRI 13256-1-WLHP)
• Unrivaled cabinet footprint that can fit most application requirements
- A four ton horizontal unit less than four feet long means the smallest horizontal cabinets in the industry!
• All-Aluminum rifled tube-and-fin air coils are not susceptible to formicary corrosion.
• Dedicated 460V 5-Speed ECM does not require use of a neutral!
• Aurora Base microprocessor control capable of operating 5-speed ECM or variable speed ECM with internally mounted
2-way valve
• Flexible factory installed options
- Corrosion-proof composite or stainless steel drain pan; including internally mounted secondary drain
connection option
- Copper or cupronickel heat exchanger and optional low temperature insulation
- Filter options: standard 1 in. MERV 4 or option 2 in. MERV 13 with either filter rails or option deluxe four sided
filter rack that is field switchable between 1 in. and 2 in.
- Aurora Base Control or with Aurora UPC with N2, BACnet, or optional LonWorks card
- Factory mounted internal water valve and/or flow regulator for variable speed pumping systems saves on
installation costs
- Other options: Sound Kit, Coated Air Coil, Phase Guard, Internally Mounted Non-fused Power Disconnect
Year WaterSource Heat Pump WLHP EER
(PSC/ECM)
Height
[in.]
Width
[in.]
Length
[in.]
3 Ton Horizontal WSHP
1980 Typical Legacy Unit 11.6/- 21.0 20.2 41.2
2018 Competitor A Compact Unit 14.2/- 19.0 22.0 54.5
2018 Competitor B Compact Unit 13.5/14 21.0 20.1 47.1
2018 Competitor C Compact Unit 13.7/- 19.0 25.0 50.0
2018 Versatec Compact 14/14.5 19.2 22.5 42.0
4 Ton Horizontal WSHP
1980 Typical Legacy Unit 10.4/- 21.0 27.2 46.2
2018 Competitor A Compact Unit 13/- 21.0 25.0 54.5
2018 Competitor B Compact Unit 13.3/14.2 21.0 24.1 54.1
2018 Competitor C Compact Unit 13.13/- 21.0 33.0 58.0
2018 Versatec Compact 13/14 19.2 22.5 45.0

8
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
The Versatec Compact Series cont.
Product Features: Vertical Cabinet
Versatec Compact vertical units are designed for high efficiency, maximum flexibility, and primary servicing from the front.
c
t Features: Vert
i
ca
l
Ca
bi
net
Compact vertical units are designed for high efficienc
y
, maximum flexibilit
y
, and primar
y
servicing from the fron
t.
Standard filter rail, field
switchable for 1 in. or
2 in. filters
Optional factory mounted
deluxe filter rack (shown),
field switchable for 1 in. or
2 in. filters
Corrosion-resistant,
composite drain pan with
overflow protection, optional
secondary drain connection
Optional stainless steel
drain pan with overflow
protection, optional
secondary drain connection Internally trapped
condensate line
Oversized rifled tube/
lanced fin all-aluminum air
coil (optional AlumiSealTM
coil coating).
Insulated divider panel
Fault and status LEDs
(
Aurora Base Control only )
A true left and right return option is available.
Microprocessor control
Aurora - Standard
Removable inlet rings for
easy blower removal
Optional ThermaShield
coated coaxial heat
exchanger
High efficiency rotary or
scroll compressor
AID Tool for diagnosing
and controlling the
Aurora control
Fault and status LEDs
( Aurora Base Control only )

9
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Optional factory mounted
filter rail accepts 1 in. and 2 in.
filters (field switchable)
Easily removable
control box
High efficiency rotary or
scroll compressor
Fault and diagnostic
LEDs (Aurora Base
Control only)
Product Features: Horizontal Cabinet
Horizontal units are designed for compact installation, maximum flexibility, and primary servicing from the front.
Four blower deck options are available. Factory or field conversion option of end or side discharge using switchable access
panels and a factory only option of true left or right return air coil.
The Versatec Compact Series cont.
Left hand return
with end discharge
Left hand return
with side discharge
Right hand return
with end discharge
Right hand return
with side discharge
Microprocessor control
ABC - Standard
UPC - Optional
Optional ThermaShield coated
coaxial heat exchanger
Smallest Cabinet
in Industry
Oversized rifled tube/lanced fin
all-aluminum air coil
(optional AlumiSeal coil coating).

10
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Flexible Product with Several Standard Options
• Compact cabinet design, vertical and horizontal with true
left and right return configurations
• Horizontal end and side discharge with vertical top
discharge air configurations
• Capacities of 6,000 through 70,000 Btu/h
• All commercial voltages including 115/60/1,
208-230/60/1, 265-277/60/1, 208-230/60/3, 460/60/3,
and 575/60/3.
• 3 speed PSC, 5 speed ECM, or optional variable speed
ECM blower motors
• All-Aluminum rifled tube-and-fin air coil are not
susceptible to formicary corrosion
• Optional AlumiSeal air coil e-coating for improved
condensate runoff
• Extended range insulation option
• Super Quiet Sound Package, including multi-density
compressor blanket
• Quiet rotary/scroll compressors
• 2-dimension refrigerant piping vibration loops to isolate
the compressor
• Discharge mufflers on sizes 048-070
• Heavy gauge cabinet and 4 vibration isolating
hanger brackets
• Internally mounted water flow regulator and/or water
solenoid valve for variable speed pumping systems
• Standard Aurora Base Control or UPC DCC Control with
standard N2, ModBus, BACnet, or optional LonWorks card
• Phase guard with optional ‘dial’ disconnect
• Polymer composite drain pan or stainless steel drain pan
with optional secondary drain connection
• 1 in. MERV 4 or 2 in. MERV 13 filters
Other options are available by special request through
WaterFurnace Commercial Sales.
High Efficiency
The Versatec Compact Series is a high efficiency water
source heat pump in a compact vertical and horizontal
cabinet. The product features highly efficient and reliable
single capacity rotary/scroll compressors mated with large
blowers. These blowers are driven by efficient 3 speed
PSC blower motors, 5-speed ECM blower motors, or highly
efficient variable speed ECM blower motors.
Super Quiet Option
An optional Super Quiet Sound Package is also available
for a modest cost and features multi-density laminate lined
compressor blanket designed to completely surround the
compressor and suppress low frequency noise.
Indoor Air Quality (IAQ)
All Versatec Compact Series features several IAQ benefits:
• Corrosion-free composite double-sloped drain pan to
eliminate standing water and prevent bacterial growth
• A washable surface on insulation in all air handler
compartments to allow cleanability and inhibit bacteria
growth. Optional non-fibrous closed cell insulation is
also available for more sensitive applications by special
request through commercial sales..
• Open filter rail comes standard for non-ducted return
applications. Filter rail is field switchable from 1 in. to 2 in.
[2.54 to 5.1 cm] for more filter options.
• Optional factory mounted, four sided, deluxe filter rack
that is field switchable from 1 in. to 2 in. [2.54 to 5.1 cm] is
available for ducted return applications.
• Standard supplied filter is a pleated MERV 4, 1 in. [2.54
cm]. An optional low static high efficiency 2 in. [5.1 cm]
MERV 13, for LEED certification points, is also available.
Internally Mounted Solenoid Valve Option
When variable speed circulating pump systems are
designed, low pressure drop (high Cv) solenoid valves are
specified at each unit to vary the pump according to flow
required. It is important that these valves be low pressure
drop to avoid unwanted pump watts. This option factory
installs this valve inside the unit.
Secondary Drain Connection Option
Some local building authority’s interpretation of codes
require more condensate overflow protection than standard
microprocessor based condensate sensors offer. In these
areas a full secondary drain pan might be required causing
both increased cost and unit service access issues. In many
of these cases a secondary drain connection option can
be added to the unit to pass this local interpretation of
condensate drain redundancy. This option adds a second
PVC drain connection to the drain pan at a higher level.
Phase Guard Monitor
Factory mounted phase guard device is available to protect
the compressor against loss of phase.
The Versatec Compact Series cont.

11
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
The Versatec Compact Series cont.
Aurora Base Control
The Aurora Base Control (ABC) System is a complete
residential and commercial comfort system that brings
all aspects of the HVAC system into one cohesive module
network. Aurora uses the Modbus communication protocol
to communicate between modules. Each module contains
the logic to control all features that are connected to
the module. The Aurora Base Control (ABC) has two
Modbus channels. The first channel is configured as a
master for connecting to devices such as a communicating
thermostat, expansion board, or other slave devices. The
second channel is configured as a slave for connecting the
Aurora Interface Diagnostic (AID) Tool.
Aurora Unitary Protocol Converter (UPC)
The optional Aurora UPC control provides unparalleled
capability in several areas including energy, refrigerant, and
performance monitoring, humidity, energy management,
and service diagnostics, and then communicates it all thru
standard DDC protocols like N2, Lon and BACnet MS/TP.
The most unique feature is integration of the Aurora
Base Control and UPC into the Versatec Compact as an
integrated heat Pump and DDC controller providing both a
cost advantage and providing features not typically found
on WSHP controls. This integration allows heat pump
monitoring sensors, status and service diagnosis faults
to be communicated thru the DDC direct to the building
automation system (BAS), giving building supervisors
detailed and accurate information on every piece of
equipment without removing an access panel!
Control General Description Application Display/Interface Protocol
Aurora Base
Control
The ABC microprocessor provides all the
features necessary to operate today’s standard
WSHPs that utilize dual capacity compressors
and variable speed ECM/5 speed ECM blower
motors with hot gas reheat. This control can
communicate to a handheld diagnostic tool
to help the installing contractor or service
technician with equipment setup and service. By
utilizing Modbus RTU communication protocol,
the ABC board can communicate with additional
devices on the Aurora network
Used for residential and commercial
applications that use single or dual capacity
compressors with PSC, 5-speed ECM, or
variable speed ECM blower motors. This base
control can also communicate to the AID Tool
to display faults, inputs/outputs, and software
revision. Commercial features such as hot gas
reheat, slow opening water valve, and random
start are also capable with the ABC board.
Optional AID toll
can be used for
field service.
Standalone
Aurora Base
Control w/UPC
BACnet or N2
The Aurora Unitary Protocol Converter (UPC)
is an integrated solution and communicates
directly with the Aurora Heat Pump Controls
and allows access/control of a variety of
internal Aurora heat pump operations such
as sensors, relay operation, faults and other
information. In turn, the UPC then converts
internal Aurora Modbus protocol to BACnet
MS/TP, or N2 protocols and communicates to
the BAS system. This provides the great benefit
of complete control integration and a myriad of
information available to the BAS from the heat
pump control. Plus it also allows individual unit
configuration such as ECM fan speeds or freeze
protection setting directly over the BAS without
the need for access to the actual heat pump.
The Aurora UPC is implemented with the Aurora
Base Controller (ABC) heat pump control into
our latest water source heat pumps. All Internal
Aurora points are accessible to the UPC via
firmware providing an integrated solution.
All zone temperatures and zone sensors
are connected to the UPC on an RNet bus,
simplifying hook up at the unit. RNet sensors
can include a combination of zone temperature
and humidity, CO2, and VOC sensors. The
UPC includes built-in support for a custom
configurable keypad/display unit.
Optional
Equipment Touch
display
BACnet MS/
TP or N2 Open
(DIP selectable)
Aurora Base
Control w/UPC
LonWorks
The Aurora Unitary Protocol Converter (UPC)
is an integrated solution and communicates
directly with the Aurora Heat Pump Controls
and allows access/control of a variety of
internal Aurora heat pump operations such
as sensors, relay operation, faults and other
information. In turn, the UPC then converts
internal Aurora Modbus protocol to LONWorks
protocol and communicates to the BAS system.
The Aurora UPC is implemented with the Aurora
Base Controller (ABC) heat pump control into
our latest water source heat pumps. All Internal
Aurora points are accessible to the UPC via
firmware providing an integrated solution.
All zone temperatures and zone sensors
are connected to the UPC on an RNet bus,
simplifying hook up at the unit. RNet sensors
can include a combination of zone temperature
and humidity, CO2, and VOC sensors. The
UPC includes built-in support for a custom
configurable keypad/display unit.
Optional
Equipment Touch
display
LonWorks
AXB Expansion
Board
(Future
Availability)
Aurora Advanced Control adds the Aurora
AXB expansion board and provides added I/O
and standard features. AXB can be added to
any of the above packages to enhance the I/O
of the controls.
• Refrigeration Monitoring – provides
Suction and discharge pressure,
Suction, liquid line temps and superheat
and subcooling.
• Performance Monitoring – provides
entering and leaving loop water
temperatures, loop flow rate as well as
heat of extraction or rejection rate into
the loop.
• Energy Monitoring – provides real-
time power measurement (Watt) of
compressor, fan, auxiliary heat and
zone pump.
• Plus many more I/O options

12
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Electrical Disconnect
An optional factory mounted, internally
(UBV/H006-012 externally mounted)
wired disconnect is available to avoid
scheduling problems with the electrical
contractor. Other features include:
• Non-fused, ‘dial’ type switch with
“on/off” position
• Compact design
• “Lockout/Tagout” feature to keep the unit “off”
during service
Low Ceiling Height Requirement (Horizontal 006-012)
Utilizing a raised drain pan, the condensate drain trap on
horizontal models 006 through 012 can be made within the
height of the cabinet. This allows the Versatec Compact to
be installed without any additional ceiling height, or in areas
where ceiling height is at a premium. The Versatec Compact
006-012 models have the lowest ceiling height installation
requirements of any AHRI listed manufacturer.
Factory Quality
• All refrigerant brazing is performed in a
nitrogen environment.
• Computer controlled deep vacuum and refrigerant
charging system.
• All joints are leak detected for maximum leak rate of
less than 1/4 oz. per year.
• Computer bar code equipped assembly line ensures all
components are correct.
• All units are computer run-tested with water to verify
both function and performance.
The Versatec Compact Series cont.

13
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Inside the Versatec Compact Series
Refrigerant
Versatec Compact products all feature zero ozone depletion
and low global warming potential refrigerant R-410A.
Cabinet
All units are constructed of corrosion resistant galvanized
sheet metal. One large lift-out access panel provides access
to the compressor and air handler section to allow servicing
of blower motor, blower, and drain pan. Refrigerant circuit
is designed to allow primary serviceability from the front.
Six (6) horizontal and six (6) vertical cabinets are provided
for application flexibility. The blower motor and blower can
be completely serviced or replaced without removal of the
unit. Service of the blower and blower motor is made easier
via the removable orifice ring on the housing.
Flexible configurations include four (4) blower deck options
for horizontals and a true left and right return on both
horizontal and vertical and the smallest horizontal cabinet
in the industry.
Filter Rack
All units come standard with an open filter rail, for use in
open return applications, or an optional deluxe filter rack/
duct collar for use with ducted returns. Both filter options
are field switchable between 1 in. [2.54 cm] and 2 in. [5.1
cm] thick filters for filter flexibility. A MERV 4, 1 in. [2.54 cm]
is standard with an optional 2 in. [5.1 cm] MERV 13 for LEED
certification points and high efficiency filtration.
Electrical Box
Unit controls feature quick
connect wiring harnesses
for easy servicing.
Separate knockouts for
low voltage and two sides
of the electrical corner
post for easy access to the
control box. 50VA or large
75VA transformer assures
adequate controls power for accessories.
Horizontal Hanger Kits
Each horizontal unit includes a hanger kit to meet seismic
specification requirements while still allowing filter access.
Drain Pan
All condensate connections are PVC glue for economical
corrosion free connections. Bacteria resistant composite
drain pan is sloped to promote complete drainage and will
never rust or corrode. Complete drainage helps to inhibit
bacterial or microbial growth. Vertical units feature an
internally trapped condensate line using clear PVC hose
for easy inspection and reduced installation cost. Optional
factory installed stainless steel drain pans are also available.
Compressors
The Versatec Compact features high efficiency R-410A
rotary (006 - 018) and scroll (024 - 070) compressors.
These types of compressors provide both high efficiency
and great reliability.

14
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Air Handler Insulation
Washable air handler insulation surface provides cleanability
to further enhance IAQ.
Thermostatic Expansion Valve
All Versatec Compact models utilize a balanced port
bidirectional thermostatic expansion valve (TXV) for
refrigerant metering. This allows precise refrigerant flow in
a wide range of entering water variation (20 to 120°F [-7 to
49°C]) found in geothermal systems. The TXV is located in
the compressor compartment for easy access.
Water-to-Refrigerant Coaxial Heat Exchanger Coil
Coaxial refrigerant to water heat exchangers provide
unparalleled efficiency. The coaxes are designed for
low pressure drop and low flow rates. All coaxes are
pressure rated to 450 psi water side and 600 psi on the
refrigerant side. Optional ThermaShield coating is available
on the water-to-refrigerant heat exchanger to prevent
condensation in low temperature loop operation.
Service Connections
and Serviceability
Two Schrader service ports are
provided in every unit. The suction
side and discharge side ports are for
field charging and servicing access. All
valves are 7/16 in. SAE connections. All
water and electrical connections are
made from the front of the unit. Unit is
designed for front access serviceability.
4-Way Reversing Valve
Versatec Compact units feature a reliable all-brass pilot
operated refrigerant reversing valve. The reversing valve
operation is limited to change of mode by the control to
enhance reliability.
All-Aluminum Air Coil
Beginning in Fall of 2013, all
models in the Versatec Compact
line began shipping with all-
aluminum air coils. WaterFurnace
is the first manufacturer to offer
an all-aluminum round-tube-and-
fin air coil in a packaged water
source heat pump. These air
coils are constructed of lanced
fin and rifled tube aluminum that
is not susceptible to formicary
corrosion. For additional
condensate runoff and meeting
project specifications, an optional
AlumiSeal e-coating is available.
Inside the Versatec Compact Series cont.
i
on
.

15
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Inside the Versatec Compact Series cont.
Blower Motor and Housing
High efficiency low rpm galvanized direct drive blower
featuring 3 speed permanently split capacitor (PSC) motor,
5-speed ECM motor, and optional variable speed ECM
blower motor. The variable speed ECM motor is controlled
directly through the unit's microprocessor control. The
lower rpm blower also reduces air noise. All PSC and
5-speed ECM motors have speed selection terminal strip on
the motor for easy speed change. All motors are vibration
isolated to reduce noise. Horizontal units can be field
converted from end to side discharge as well.
NOTE: 460V 5-speed ECM blower motor does not require a
neutral wire.
5-Speed ECM Constant Torque Motors
The 5-speed ECM is a ‘Constant Torque’ ECM motor and
delivers air flow similar to a PSC but operates as efficiently
as an variable speed ECM Motor. Because it’s an ECM Motor,
the 5-speed ECM can ramp slowly up or down like the
variable speed ECM Motor. There are 5 possible speed taps
available on the 5-speed motor with #1 being the lowest
airflow and #5 being the highest airflow. These speed
selections are preset at the time of manufacture and are
easily changed in the field if necessary.
5-Speed ECM Benefits:
- High efficiency
- Soft start
- 5 speeds with up to 4 speeds on-line
- Built in logic allows air flow to change with G, Y1,
Y2 and W signals
- Super efficient low airflow continuous blower
setting (G)

16
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Controls - Aurora Base Control
Aurora ‘Base’ Control
NOTE: Refer to the Aurora Base Control Application and
Troubleshooting Guide and the Instruction Guide: Aurora
Interface and Diagnostics (AID) Tool for additional information.
Control Features
S
oftware ABC Standard Version 3.0
Single or Dual Capacity Compressors
Either single or dual capacity compressors can be operated.
Variable Speed ECM
Blower Motor Option (If Applicable)
A Variable Speed ECM blower motor can be driven directly
using the onboard PWM output. Four blower speeds are
available based upon the G, Y1, Y2, and W input signals to
the board. The blower speeds can be changed either by the
ECM manual configurations mode method or by using the
Aurora AID Tool directly. All four blower speeds can be set
to the same speed if desired.
5-Speed ECM Blower Motor Option (If Applicable)
A 5-Speed ECM blower motor will be driven directly using
the thermostat connections. Any of the G, Y1, or Y2/W
signals can drive any of the 5 available pre-programmed
blower speeds on the motor. All 5 Series "G" vintage units
will be wired this way at the factory.
Other Control Features
• Random start at power up
• Anti-short cycle protection
• High and low pressure cutouts
• Loss of charge
• Water coil freeze detection
• Air coil freeze detection
• Over/under voltage protection
• Condensate overflow sensor
• Load shed
• Dehumidification (where applicable)
• Emergency shutdown
• Hot gas reheat operation (where applicable)
• Diagnostic LED
• Test mode push button switch
• Two auxiliary electric heat outputs
• Alarm output
• Accessory output with N.O. and N.C.
• Two Modbus communication Ports
Field Selectable Options via Hardware
DIP Switch (SW1) – Test/Configuration Button (See SW1
Operation Table)
Test Mode
The control is placed in the test mode by holding the push
button switch SW1 for 2 - 5 seconds. In test mode most of
the control timings will be shortened by a factor of sixteen
(16). LED3 (green) will flash at 1 second on and 1 second
off. Additionally, when entering test mode LED1 (red) will
flash the last lockout one time. Test mode will automatically
time out after 30 minutes. Test mode can be exited by
pressing and holding the SW1 button for 2 to 5 seconds or
by cycling the power. NOTE: Test mode will automatically
be exited after 30 minutes.
Variable Speed ECM Configuration Mode
(If Applicable)
The control is placed in the ECM configuration mode by
holding the pushbutton switch SW1 for 5 to 10 seconds, the
high, low, and “G” ECM speeds can be selected by following
the LED display lights. LED2 (yellow) will fast flash when
entering the ECM configuration. When setting “G” speed
LED3 (green) will be continuously lit, for low speed LED1
(red) will be continuously lit, and for high speed both LED3
(green) and LED1 (red) will be continuously lit. During the
ECM configuration mode LED2 (yellow) will flash each of
the 12 possible blower speeds 3 times. When the desired
speed is flashed press SW1, LED2 will fast flash until SW1
is released. “G” speed has now been selected. Next select
low speed, and high speed blower selections following the
same process above. After third selection has been made,
the control will exit the ECM configuration mode. Aux fan
speed will remain at default or current setting and requires
the AID Tool for adjustment.
Reset Configuration Mode
The control is placed in reset configuration mode by
holding the push button switch SW1 for 50 to 60 seconds.
This will reset all configuration settings and the EEPROM
back to the factory default settings. LED3 (green) will turn
off when entering reset configuration mode. Once LED3
(green) turns off, release SW1 and the control will reset.
DIP Switch (SW2)
SW2-1 FP1 Selection – Low water coil temperature limit
setting for freeze detection. On = 30°F; Off = 15°F.
SW2-2 FP2 Selection – On = 30°F; Off = N/A
SW2-3 RV – O/B - thermostat type. Heat pump
thermostats with “O” output in cooling or “B”
output in Heating can be selected. On = O; Off = B.
SW2-4 Access Relay Operation (P2)
and 2-5
Access Relay Operation SW2-4 SW2-5
Cycle with Blower ON ON
Cycle with Compressor OFF OFF
Water Valve Slow Opening ON OFF
Cycle with Comm. T-stat Hum Cmd OFF ON

17
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Controls - Aurora Base Control cont.
Cycle with Blower - The accessory relay will cycle with
the blower output.
Cycle with Compressor - The accessory relay will cycle
with the compressor output.
Water Valve Slow Opening - The accessory relay will
cycle and delay both the blower and compressor output
for 90 seconds.
SW2-6 CC Operation – selection of single or dual capacity
compressor. On = Single Stage; Off = Dual Capacity
SW2-7 Lockout and Alarm Outputs (P2) – selection of a
continuous or pulsed output for both the LO and
ALM Outputs. On = Continuous; Off = Pulsed
SW2-8 Future Use
Alarm Jumper Clip Selection
From the factory, ALM is connected to 24 VAC via JW2. By
cutting JW2, ALM becomes a dry contact connected to ALG.
Variable Speed ECM Blower Speeds
The blower speeds can be changed either by using the
ECM manual configurations mode method or by using the
Aurora AID Tool directly (see Instruction Guide: Aurora
Interface and Diagnostics (AID) Tool topic).
Field Selectable Options via Software
(Selectable via the Aurora AID Tool)
ECM Blower Speeds
An ECM blower motor can be driven directly using the
onboard PWM output. Four blower speeds are available,
based upon the “G”, Y1 (low), Y2 (high), and Aux input
signals to the board. The blower speeds can be changed
either by the ECM manual configurations mode method (see
ECM Configuration Mode topic) or by using the Aurora AID
Tool directly. All four blower speeds can be set to the same
speed if desired. Aux blower speed will remain at default or
current setting and requires the AID Tool for adjustment.
Safety Features
The following safety features are provided to protect the
compressor, heat exchangers, wiring and other components
from damage caused by operation outside of design conditions.
Fuse – a 3 amp automotive type plug-in fuse provides
protection against short circuit or overload conditions.
A
nti-Short Cycle Protection – 4 minute anti-short cycle
protection for the compressor.
Random Start – 5 to 80 second random start upon power up.
Fault Retry – in the fault condition, the control will stage off
the outputs and then “try again” to satisfy the thermostat
Y input call. Once the thermostat input calls are satisfied,
the control will continue on as if no fault occurred. If 3
consecutive faults occur without satisfying the thermostat
Y input call, then the control will go to Lockout mode.
Lockout – when locked out, the blower will operate
continuously in “G” speed, and PSC blower motor output
will remain on. The Alarm output (ALM) and Lockout output
(L) will be turned on. The fault type identification display
LED1 (Red) shall flash the fault code. To reset lockout
conditions with SW2-8 On, thermostat inputs “Y1”, “Y2”,
and “W” must be removed for at least 3 seconds. To reset
lockout conditions with SW2-8 Off, thermostat inputs “Y1”,
“Y2”, “W”, and “DH” must be removed for at least 3 seconds.
Lockout may also be reset by turning power off for at least
30 seconds or by enabling the emergency shutdown input
for at least 3 seconds.
Lockout With Emergency Heat - if the control is locked out
in the heating mode, and a Y2 or W input is received, the
control will operate in the emergency heat mode while the
compressor is locked out. The first emergency heat output will
be energized 10 seconds after the W input is received, and the
blower will shift to high speed. If the control remains locked
out, and the W input is present, additional stage of emergency
heat will stage on after 2 minutes. When the W input is
removed, all of the emergency heat outputs will turn off, and
the ECM blower will shift to “G” speed and PSC blower motor
output will remain on.
High Pressure – fault is recognized when the Normally
Closed High Pressure Switch, P4-9/10 opens, no matter
how momentarily. The High Pressure Switch is electrically in
series with the Compressor Contactor and serves as a hard-
wired limit switch if an overpressure condition should occur.
Low Pressure - fault is recognized when the Normally
Closed Low Pressure Switch, P4-7/8 is continuously open
for 30 seconds. Closure of the LPS any time during the 30
second recognition time restarts the 30 second continuous
open requirement. A continuously open LPS shall not be
recognized during the 2 minute startup bypass time.
Loss of Charge – fault is recognized when the Normally
Closed Low Pressure Switch, P4-7/8 is open prior to the
compressor starting.
Condensate Overflow - fault is recognized when the
impedance between this line and 24 VAC common or chassis
ground drops below 100K ohms for 30 seconds continuously.
Freeze Detection (Coax) - set points shall be either 30°F
or 15°F. When the thermistor temperature drops below
the selected set point, the control shall begin counting
down the 30 seconds delay. If the thermistor value rises
above the selected set point, then the count should reset.
The resistance value must remain below the selected set
point for the entire length of the appropriate delay to be
recognized as a fault. This fault will be ignored for the initial
2 minutes of the compressor run time.
Freeze Detection (Air Coil) - uses the FP2 input to protect
against ice formation on the air coil. The FP2 input will
operate exactly like FP1 except that the set point is 30
degrees and is not field adjustable.

18
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Controls - Aurora Base Control cont.
Over/Under Voltage Shutdown - An over/under voltage
condition exists when the control voltage is outside the
range of 18 VAC to 30 VAC. If the over/under voltage
shutdown lasts for 15 minutes, the lockout and alarm relay
will be energized. Over/under voltage shutdown is self-
resetting in that if the voltage comes back within range
of 18 VAC to 30 VAC for at least 0.5 seconds, then normal
operation is restored.
Operation Description
Power Up - The unit will not operate until all the inputs and
safety controls are checked for normal conditions. The unit
has a 5 to 80 second random start delay at power up. Then
the compressor has a 4 minute anti-short cycle delay after
the random start delay.
S
tandby In standby mode, Y1, Y2, W, DH, and G are not
active. Input O may be active. The blower and compressor
will be off.
Heating Operation
S
ingle Compressor Heating, 2nd Stage (Y1, Y2)
The compressor will be staged to full capacity 20 seconds
after Y2 input is received. The ECM blower will shift to high
speed seconds after the Y2 input is received.
Dual Compressor Heating, 2nd Stage (Y1, Y2)
In dual compressor operation, two ABC boards used in 24
VAC operation, there will be a Y2 call to the Y1 input on the
second ABC. The compressor will stage to full capacity 30
seconds after Y1 input is received to the second board.
S
ingle Compressor Heating, 3rd Stage (Y1, Y2, W)
The hot water pump is de-energized and the first stage of
electric heat is energized 10 seconds after the W command
is received. If the demand continues the second stage of
electric heat will be energized after 5 minutes.
Dual Compressor Heating, 3rd Stage (Y1, Y2, W) -
The first stage of electric heat is energized 10 seconds
after the W command is received. If the demand continues
the second stage of electric heat will be energized after 5
minutes
Emergency Heat (W) - The blower will be started on “G”
speed, 10 seconds later the first stage of electric heat will
be turned on. 5 seconds after the first stage of electric
heat is energized the blower will shift to Aux speed. If the
emergency heat demand is not satisfied after 2 minutes the
second electric heat stage will be energized.
Blower (G) - The blower will start immediately upon
receiving a thermostat G command. If there are no other
commands from the thermostat the ECM will run on “G”
speed until the G command is removed. Regardless of
blower input (G) from the thermostat, the blower will
remain on for 30 seconds at the end of each heating cycle.
Cooling Operation
In all cooling operations, the reversing valve directly tracks
the O input. Thus, anytime the O input is present, the
reversing valve will be energized.
Single Compressor Cooling, 2nd Stage (Y1, Y2, 0)
The compressor will be staged to full capacity 20 seconds
after Y2 input was received. The ECM blower will shift to high
speed 15 seconds after the Y2 input was received.
Dual Compressor Cooling, 2nd Stage (Y1, Y2, O)
In dual compressor operation, two ABC boards used in 24
VAC operation, there will be a Y2 call to the Y1 input on the
second ABC. The compressor will stage to full capacity 30
seconds after Y1 input is received to the second board.
Blower (G) - The blower will start immediately upon
receiving a thermostat G command. If there are no other
commands from the thermostat the ECM will run on “G”
speed until the G command is removed. Regardless of
blower input (G) from the thermostat, the blower will
remain on for 30 seconds at the end of each heating,
cooling, and emergency heat cycle.
Dehumidification (Y1, O, DH or Y1, Y2, O, DH) - When a
DH command is received from the thermostat during a
compressor call for cooling the ECM blower speed will be
reduced by 15% to increase dehumidification.
Emergency Shutdown - Four (4) seconds after a valid ES
input, P2-7 is present, all control outputs will be turned off
and remain off until the emergency shutdown input is no
longer present. The first time that the compressor is started
after the control exits the emergency shutdown mode,
there will be an anti-short cycle delay followed by a random
start delay. Input must be tied to common to activate.
Continuous Blower Operation - The blower output will
be energized any time the control has a G input present,
unless the control has an emergency shutdown input
present. The blower output will be turned off when G input
is removed.
Load Shed - The LS input disables all outputs with the
exception of the blower output. When the LS input has been
cleared, the anti-short cycle timer and random start timer
will be initiated. Input must be tied to common to activate.

19
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
Controls - Aurora Base Control cont.
CC2
EH1
Factory
Fault
ALG
ALM
LS
ES
ACCc
Status
AURORA BASE
CONTROL™
RV – K1
CC2
CC – K2
CCHi – K3
Fan – K4
Alarm– K5
Acc – K6
ACCno
ACCnc
O/B
C R
LO
G
Y1
Y2
W
DH
3A-Fuse
O/B
C
R
LO
G
Y1
Y2
W
DH
LO
G
HI
CCG
CC
FG
F
R
HP
HP
LP
FP2
FP2
FP1
REV
REV
CFM
PWM
ECMPWM
Factory
Factory Fan Connection
RR
CC
C
RS 485
EH2
C
EH1
C
CO
(+)
(-)
R
C
RS485 Exp Factory
Com1
Com2
Config
G
G
G
YR
SW1Test
FP1 – 15oF/30oF
JW2-
Alarm
P11
P5
P2 P1
P8
P7
P9
P6
P3
SW2
P13
P4 FP2 – 15oF/30oF
RV – B/O
ACC–Dip 4
ACC–Dip 5
CC – Dual/Single
L – Pulse/Continuous
Reheat/Normal
Factory Use
FieldConnectionsFieldConnections
C
LP
FP1
F
CC
G
Y1
1
2
3
4
5
6
7
8
Off On
N/A
RS485 NET
LED3
LED2LED1
Aurora Interface and Diagnostics (AID) Tool
The Aurora Interface and
Diagnostics (AID) Tool is
a device that is a member
of the Aurora network.
The AID Tool is used to
troubleshoot equipment
which uses the Aurora
control via Modbus RTU
communication. The AID
Tool provides diagnostics,
fault management, ECM
setup, and system configuration capabilities to the Aurora
family of controls. An AID Tool is recommended, although
not required, for ECM airflow settings. The AID Tool simply
plugs into the exterior of the cabinet in the AID Tool port.
ABC Control Board Layout
Aurora ‘Base’ Control LED Displays
These three LEDs display the status, configuration, and
fault codes for the control. These can also be read in plain
English via the Aurora AID Tool.
Status LED (LED3, Green)
Description of Operation Fault LED, Green
Normal Mode ON
Control is Non-functional OFF
Test Mode Slow Flash
Lockout Active Fast Flash
Dehumidification Mode Flash Code 2
(Future Use) Flash Code 3
(Future Use) Flash Code 4
Load Shed Flash Code 5
ESD Flash Code 6
(Future Use) Flash Code 7
Configuration LED (LED2, Yellow)
Description of Operation Configuration LED, Yellow
No Software Overwritten Flashing ECM Setting
DIP Switch was Overwritten Slow Flash
ECM Configuration Mode Fast Flash
Fault LED (LED1, Red)
Red Fault LED LED Flash
Code* Lockout Reset/ Remove
ABC Basic Faults
Normal - No Faults OFF –
Fault - Input 1 No Auto
Fault - High Pressure 2 Yes Hard or Soft
Fault - Low Pressure 3 Yes Hard or Soft
Fault - Freeze Detection FP2 4 Yes Hard or Soft
Fault - Freeze Detection FP1 5 Yes Hard or Soft
Fault - Condensate Overflow 7 Yes Hard or Soft
Fault - Over/Under Voltage 8 No Auto
Fault - FP1 & FP2 Sensor Error 11 Yes Hard or Soft
NOTE: All codes >11 use long flash for tens digit and short flash for the ones
digit. 20, 30, 40, 50, etc. are skipped.

20
VERSATEC COMPACT SERIES SPECIFICATION CATALOG
The Aurora Unitary Protocol Converter (UPC) is designed
to add-on to any Aurora based heat pump control. The
Aurora Unitary Protocol Convertor (UPC) is designed
to allow water source heat pumps to be integrated into
Building Automation Systems (BAS) with ease. The
Aurora UPC is an integrated solution and communicates
directly with the Aurora Heat Pump Controls and allows
access/control of a variety of internal Aurora heat pump
operations such as sensors, relay operation, faults and
other information. In turn, the UPC then converts internal
Aurora Modbus protocol to BACnet MS/TP, LON, or N2
protocols and communicates to the BAS system. This
provides the great benefit of complete control integration
and a myriad of information available to the BAS from
the heat pump control. Plus it also allows individual unit
configuration such as ECM fan speeds or freeze protection
setting directly over the BAS without the need for access
to the actual heat pump. The Aurora UPC is programmed
using the powerful Eikon object oriented.
The Aurora UPC is implemented with the Aurora Base
Controller (ABC) heat pump control into our latest water
source heat pumps. This will allow for a BAS to integrate
and communicate to the heat pump thru a choice of 3
different communication protocols. The Aurora UPC has
the ability to communicate BACnet MS/TP, N2 open, or
LonWorks (requires LON Plugin card). This flexibility is
possible due to the onboard dipswitches which allow for the
desired protocol and baud rate to be selected in the field.
All zone temperatures and zone sensors are connected
to the UPC on an RNet bus, simplifying hook up at the
unit. RNet sensors can include a combination of zone
temperature and humidity, CO2, and VOC sensors. The
UPC includes built-in support for a custom configurable
keypad/display unit - BACview6 (4-line by 40 character
per line display) or BACview5 (2-line by 16 character per
line display). Up to 2 Keypad/display units can be mounted
remotely for configuration and troubleshooting.
There are an extensive number of points that the UPC has
available over the network for integration into the BAS.
Control programmers need to carefully determine which
points they want to add into the BAS database. A list of
the BACnet points, N2 points, and LON SNVTs are available
along with their individual point descriptions by contacting
the Commercial Solutions Group at 1-877-677-4420.
Aurora UPC Controller ZS Series Sensors
Controls - UPC DDC Control (optional)