Johnson Controls RBS009 User manual

RB Series Engineering Guide
RB Series
Commercial
Water Source/Geothermal Heat Pump
• R-410A Refrigerant
• 0.5-6 Ton
Design Features
Factory Options
Accessories
Dimensional Data
Physical Data
Performance Data
Engineering Guide Specifications
R
B
Form: 146.07-EG2 (1018)
Supercedes: 146.07-EG1 (318)

RB SERIES ENGINEERING GUIDE
Table of Contents
Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
AHRI Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
The RB Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
Inside the RB Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-19
Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-22
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Installation Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23-25
Vertical Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-27
Horizontal Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28-29
Hanger Bracket Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Electrical Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33-35
Blower Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36-39
Selection Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40-41
Reference Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Legend and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Correction Factor Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45-65
Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66-71
Engineering Guide Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72-74
Revision Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

4
RB SERIES ENGINEERING GUIDE
Model Nomenclature
All RB Series product is safety listed under UL1995 thru ETL and performance listed with AHRI in
accordance with standard 13256-1.
RB S
RB
S
1-2 4 5-7 8 9 10
Model Type
RB – RB Series
Operation Range
S – Single Stage
Cabinet Configuration
V – Vertical
H - Horizontal
Unit Capacity (MBTUH)
006, 009, 012, 015,
018, 024, 030, 036,
041* (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 (018-036)
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)
Future Option
0 – None
Blower Options
0 – PSC Blower
1 – Variable Speed ECM Blower (015-070)
4 – 5-Speed ECMBlower (015-070)
Water Coil Option
C – Copper
N – CuproNickel
Sound Kit Option
A – None
B – Sound Kit (Not Available on H006-012)
Future Option
N – None
Vintage
* – Factory UseOnly
Non-Standard Options
SS – Standard
SA – Split Access Panel
SB – Service Ports located to thefront of the unit
SD – Split Access Panel and Service Ports located to
the front of the unit
Drain Pan Option
0 – Composite, No Secondary Connection
1 – Composite, Secondary Connection
2 – Stainless Steel, No Secondary Connection
3 – Stainless Steel, Secondary Connection
Cabinet Option
0 – Unpainted, 1 in MERV 4, Filter Rail
1 – Painted, 1 in MERV 4, Filter Rail
2 – Unpainted, 2 in MERV 13, Filter Rail
3 – Painted, 2 in MERV 13, Filter Rail
4 – Unpainted, 1 in MERV 4, Filter Rack
5 – Painted, 1 in MERV 4, Filter Rack
6 – Unpainted, 2 in MERV 13, Filter Rack
7 – Painted, 2 in MERV 13, Filter Rack
Electrical Option
N – No Phase Guard, No Disconnect
D – No Phase Guard, Disconnect
P – Phase Guard, No Disconnect
B – Phase Guard, Disconnect
Air Coil Option
5 – All-Aluminum, AlumiSealTM, Extended Range
6 – All-Aluminum, AlumiSeal, Standard Range
7 – All-Aluminum, No Coating, Extended Range
8 – All-Aluminum, No Coating, Standard Range
Control Option
A – AuroraTM Base Control (ABC)
Z – AuroraTM with SMART Equipment DDC
Water ControlOption
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
FlowRegulator
E – Waterside Economizer w/ 2-Way Valve
C – Waterside Economizerw/ 2-Way Valve &
Water Flow Regulator
11 12 13 15
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Note: Phase Guard Only Available on 208-230/60/3 and 460/60/3
50VA Transformer with Aurora and 75VA Transformerwith SMARTEquipment
Waterside economizer option must be ordered with stainless steel drain pan and either5-speed ECM orvariablespeedECM (024-070)
*2 way valve, water flow regulator, economizer, disconnect, 2" filter and filter rack not available in RBSV041.

5
RB SERIES ENGINEERING GUIDE
AHRI Data
PSC Motors
AHRI/ASHRAE/ISO 13256-1
English (IP) Units
Model
Flow Rate
AHRI 500* Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump
IEER SCHE Cooling
EWT 86°F
H e a t i n g
EWT 68°F
Cooling
EWT 59°F
H e a t i n g
EWT 50°F
Cooling
EWT 77°F
H e a t i n g
EWT 32°F
gpm cfm EER
Btuh/W
COP
Btuh/W
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 16.7 16.3 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 15.3 16.2 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 14.7 15.5 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 16.0 16.4 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 16.3 16.1 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 15.7 16.3 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 16.8 16.7 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 17.3 17.3 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 16.1 16.0 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 16.1 16.8 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 16.3 16.5 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 16.4 16.2 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 16.4 16.5 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
AHRI 500* Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump
IEER SCHE Cooling
EWT 86°F
H e a t i n g
EWT 68°F
Cooling
EWT 59°F
H e a t i n g
EWT 50°F
Cooling
EWT 77°F
H e a t i n g
EWT 32°F
gpm cfm EER
Btuh/W
COP
Btuh/W
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 17.2 16.7 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 16.7 17.3 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 15.9 16.3 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 16.6 16.9 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 17.3 17.0 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 16.5 17.0 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 17.9 17.6 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 18.1 18.1 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 16.8 17.1 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 17.5 17.8 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 16.8 17.3 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 17.2 17.1 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 17.5 17.4 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
The purpose of this standard is to establish an IEER and SCHE Method of Calculation for Water/Brine Source Heat Pumps. This standard utilizes
the Published, Certified Data, of performance standard ISO/AHRI/ANSI/ASHRAE 13256-1:1998, and includes the definitions; rating requirements;
minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions required.

6
RB SERIES ENGINEERING GUIDE
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
RB SERIES ENGINEERING GUIDE
The RB Series
Vertical RB Series
Models RBSV 006-070 (0.5-6 tons) Single Speed
Horizontal RB Series
Models RBSH 006-070 (0.5-6 tons) Single Speed
The RB Series 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 RB Series 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 RB
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.
RB Series 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 FEC 2611 with N2, LonWorks, or BACnet cards
-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 RB Series 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 RB Series 13/14 19.2 22.5 45.0

8
RB SERIES ENGINEERING GUIDE
The RB 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: Vertical
C
abinet
C
ompact vertical units are desi
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ff
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rom the
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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
Smart Equipment
Controls - Optional
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
RB SERIES ENGINEERING GUIDE
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 RB 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
Smart Equipment
Controls - 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
RB SERIES ENGINEERING GUIDE
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 18,000 through 70,000 Btu/h
• All commercial voltages including 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
• AlumiSeal coated air coils
• 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
• StandardAurora Base Control or FEC 2611 Control with optional
N2, Lonworks, or BACnet DDC cards
• 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 sales.
High Efficiency
The RB 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.
Quiet Operation
All RB Series product incorporates several noise reduction
technologies and is ARI 260 sound rated using third party sound
testing. Room Noise Criteria Curves (NC Curve) may be calculated
using data from the ARI 260 ratings giving the engineer total
flexibility in assuring a quiet environment. Please refer to the
separate Sound Ratings and Performance Catalog concerning this
standard and RB Series sound performance data.
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 units feature several IAQ benefits:
• Corrosion-free composite double-sloped drain pan to
eliminate standing water and prevent bacterial growth
• Awashable 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.
Flexible Control Options
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
satellite devices. The second channel is configured as a satellite for
connecting the Aurora Interface Diagnostic Tool (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.
The RB Series cont.
Aurora Base Control
and AID Tool
Aurora Base
C

11
RB SERIES ENGINEERING GUIDE
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
Factory mounted phase guard device is available to protect the
compressor against loss of phase.
Disconnect
An optional factory mounted, internally
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 RB Series to be installed without any
additional ceiling height, or in areas where ceiling height is at a
premium. The RB Series 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 RB Series cont.

12
RB SERIES ENGINEERING GUIDE
Inside the RB Series
Refrigerant
All units 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.
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. 50VAor 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
High efficiency R-410Areciprocating compressors are used
on every model. Reciprocating compressors provide both high
efficiency and great reliability.

13
RB SERIES ENGINEERING GUIDE
Air Handler Insulation
Washable air handler insulation surface provides cleanability to
further enhance IAQ.
Thermostatic Expansion Valve
All units 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
All 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
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 RB Series cont.

14
RB SERIES ENGINEERING GUIDE
Inside the RB 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
airflow 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
ECM 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)

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,
theABC board can communicate with additional
devices on theAurora 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 theABC board.
Optional AID Tool
can be used for field
service.
Standalone
15
RB SERIES ENGINEERING GUIDE
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. TheAurora 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 satellite devices. The second channel is configured as a satellite for connecting theAurora Interface Diagnostic Tool (AID Tool).
Controls

16
RB SERIES ENGINEERING GUIDE
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
Controls - Aurora Base Control

17
RB SERIES ENGINEERING GUIDE
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
RB SERIES ENGINEERING GUIDE
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
RB SERIES ENGINEERING GUIDE
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
RB SERIES ENGINEERING GUIDE
The Closed Loop Heat Pump Concept
The basic principle of a water source heat pump is the transfer
of heat into water from the space during cooling, or the transfer
of heat from water into the space during heating. Extremely high
levels of energy efficiency are achieved as electricity is used only
to move heat, not to produce it. Using a typical RB Series, one unit
of electricity will move four to five units of heat.
When multiple water source heat pumps are combined on a
common circulating loop, the ultimate in energy efficiency is
created: The heat pump units on cooling mode are adding heat
to the loop which the units in heating mode can absorb, thus
removing heat from the area where cooling is needed, recovering
and redistributing that heat for possible utilization elsewhere in
the system. In modern commercial structures, this characteristic
of heat recovery from core area heat generated by lighting, office
equipment, computers, solar radiation, people or other sources, is
an important factor in the high efficiency and low operating costs of
closed source heat pump systems.
In the event that a building's net heating and cooling requirements
create loop temperature extremes, RB Series units have the
extended range capacity and versatility to maintain a comfortable
environment for all building areas. Excess heat can be stored
for later utilization or be added or removed in one of three ways;
by ground-source heat exchanger loops: plate heat exchangers
connected to other water sources, or conventional cooler/boiler
configurations. Your sales representative has the expertise and
computer software to assist in determining optimum system type
for specific applications.
The Closed Loop Advantage
A properly applied water source heat pump system offers many
advantages over other systems. First costs are low because
units can be added to the loop on an “as needed basis”- perfect
for speculative buildings. Installed costs are low since units are
self-contained and can be located adjacent to the occupied
space, requiring minimal ductwork. Maintenance can be done
on individual units without system shut-down. Conditions remain
comfortable since each unit operates separately, allowing cooling
in one area and heating in another. Tenant spaces can be
finished and added as needed. Power billing to tenants is also
convenient since each unit can be individually metered: each pays
for what each uses. Nighttime and/or weekend uses of certain
areas are possible without heating or cooling the entire facility.
A decentralized system also means if one unit should fault, the
rest of the system will continue to operate normally, as well as
eliminating air cross-contamination problems and expensive high
pressure duct systems requiring an inefficient electric resistance
reheat mode.
The RB Series Approach
There are a number of proven choices in the type of RB Series
system which would be best for any given application. Most often
considered are:
• Closed Loop/Ground-Source Systems utilize the stable
temperatures of the earth to maintain proper water source
temperatures (via vertical or horizontal closed loop heat exchangers)
for RB Series extended range heat pump system. Sizes range from
a single unit through many hundreds of units. When net cooling
requirements cause closed loop water temperatures to rise, heat is
dissipated into the cooler earth through buried high strength plastic
pipe “heat exchangers.” Conversely if net space heating demands
cause loop heat absorption beyond that heat recovered from building
core areas, the loop temperature will fall causing heat to be extracted
from the earth. Due to the extended loop temperatures,AHRI/ISO
13256-1 Ground Loop Heat Pumps are required for this application.
Application Notes
Supply Water
Return Water
Pumps
RB Series
Unit
RB Series
Unit
RB Series
Unit
RB Series
Unit
RB Series
Unit
RB Series
Unit
Heater/
Rejector
Vertical - Closed Loop/Ground Source