Hubbell Electric Heater R0011-2S User Manual

Point-of-Use Tankless

Tankless Electric Water
Heater

Available 3 - 27 KW in Single Phase Voltages

Features

■ Heavy Duty Construction

� Constructed with high grade materials

to ensure long operating life

� Simple to install and operate
� Compact space saving design

■ Reliability

� Engineered to ensure reliable operation
� Wide selection of sizes

■ High Efciency

� On demand heating eliminates costly and

cumbersome storage tanks

� Instantaneous design reduces stand-by heat

loss and signicantly lowers operating costs
compared to traditional storage tanks

Electric Tankless Water Heater

Applications

■

Point-of-Use

■Single or Multiple Lav Sinks

■

Condos & Apartments

■

Whole House

Y

L

D

N

E

I

R

F

C

I

F

I

E

F

N

E

%

8

9

•

O

C

E

T

•

E

N

E

R

G

Y

&

W

A

T

E

R

S

•

A

V

G

I

N

The Hubbell Tankless is a highly efcient and compact
electric tankless water heater that is easy to install, operate

ANSI/NSF 5

and maintain.

Tankless Water Heater For Residential and Commercial Use

The Hubbell Tankless electric water heater is a highly
reliable and easily maintained heater designed for point­of-use or whole house operation. The Hubbell Tankless
electric water heater is compact, extremely efcient,
takes up minimal space and reduces operating costs.
Hubbell’s vast experience, meticulous engineering and

advanced technology ensure that you can rely on the
Hubbell Tankless heater for your water heating needs
in even the most demanding applications. The Hubbell
Tankless is the right choice for your water heating
needs and provides you with an energy efcient,
trouble-free and long lasting heater.

High Efciency Compact Electric Tankless Heater

Hubbell Tankless Features

How It Works

The Hubbell tankless electric water heater contains high powered heating elements that heat water
only when there is demand for hot water. When hot water is needed, a built in ow sensor measures
the exact ow rate, and that data combined with temperature readings at the heater’s inlet and outlet
are processed by the electronic temperature controller. This data is continuously transmitted to the
temperature controller, which constantly calculates the precise amount of power (kW) needed to achieve
the desired temperature. A zero cross over ring signal is sent to the fast acting triacs in order to
modulate the heating elements to the precise level needed to meet demand. The Hubbell tankless heater
uses only as much power as is needed, while delivering accurate and consistent hot water temperature.

Heater Overview - 3 Element Model Shown

Commercial Quality
Heating Elements

Incoloysheathedforlonglife

Safety Thermostats

AutoresettingHi-Limitthermostats
protectagainstoverheating

Stainless Steel Exterior

Sleekdesignandcorrosion
resistantforlonglife

Heating Chamber

Allcopperandbronze
construction

Outlet Thermistor

Providesfeedbacktoensure
consistentoutlettemperature

HOT WATER OUT

Inlet Thermistor

Sensescoldwatertemperature

Numeric Digital Display

ElectronicTemperatureController
isadjustablein1°incrementsineither
°For°C

Solid State Switching Triac

Modulatesheatingelements0-100%
toensureaccuratetemperaturesand
longelementlife

Power Terminal Block

Universalelectricalconnectionpoint

Flow Meter

Measurestheflowrateprecisely
toaccuratelycontrolhotwater
temperature

Press Fit Connections

Simplifiesplumbinginstallation

COLD WATER IN

Drain Port

Simplifieswinterizationprocess

forseasonalinstallations

Tankless Standard Specications

Heating Chamber:

Capacities:

Orientation:

Voltage:

Phase:

Power Factor:

Thermal Efciency:

Inlet/Outlet Size:

Min/Max Flow:

Thermostat Range:

2

Copper and Bronze

3 thru 27 kW

Wall Mounted

240 / 220 /208 Volt

1

Φ

0.999

98% +

3

/4" Press Fit

0.2 GPM Min, 8.0 GPM Max

32 -140°F / 0-60°C

Hi-Limit:

Design WP:

Design TP:

Elements:

Standby Power:

Chamber
Warranty:

Electrical
Warranty:

Enclosure:

Approvals:

150°F (65°C)

150 psi

300 psi

Incoloy 800

<

3 Watts

Residential:
Commercial:

Residential:
Commercial:

304 Stainless Steel Brushed Finish

cULus, UL EPH ANSI/NSF5

5 Years
5 Years

3 Years
1 Years

Technical Features

Temperature Controller

A sophisticated electronic temperature controller with LED digital display provides the user interface. The temperature

controller processes all ow and temperature data and calculates the precise amount of power needed to meet demand.

Operator Control Capabilities

✓

Power Limiting:

✓

Diagnostics:

✓

Cost Calculator:

✓

Temperature Control:

Full Heater Modulation

Each heating element is switched on/off using a fast acting solid state triac with zero cross over ring control. This
switching schema provides full modulation of each heating element, ensuring that the precise amount of heat is added to
meet demand. To improve operating efciency and component longevity, each triac is mounted to a heat sink located on
the incoming supply piping so that heat generated by the triac during the switching process is dissipated into the water.

Proper Power Integrity

All Hubbell tankless water heaters are engineered to operate as a balanced load and operate at 0.999 Power Factor.
All load switching in Hubbell tankless models is performed as zero cross over, eliminating phase angle ring interference
and associated EMI issues.

Allows the operator to reduce the power consumption by any percentage to provide
installation and operational flexibility and savings.

Display inlet and outlet temperatures, flow rate and error codes to assist in troubleshooting.

Determine the exact cost of operating the heater. Input your cost per KW·Hr and the
controller displays total KW·HRs consumed, total cost of operation, and total hot water usage
(shown in gallons or liters).

Set the digital display to the desired water temperature in °F or °C. Fully adjustable in 1°
increments from 32-194°F (0-90°C). A user adjustable +/- 3° calibration feature provides
additional control for superior accuracy.

Full Resource Staging

The Hubbell tankless control schema ensures that usage is equalized across all heating circuits. To achieve this,
once the controller has calculated the precise amount of kW required, all circuits are energized in a staggered fashion
such that each circuit is proportionally and independently energized and then time staggered between circuits. This
Full Resource Staging Schema reduces EMI output, increases component longevity and provides highly accurate and
consistent hot water temperatures.

Building Management Integration

Remote Control: Ability to remotely enable or inhibit the heating operation of the unit using one of the following two methods:

1. Customer supplied 24VDC signal is user congured for either Inhibit Mode or Normal Operation Mode.

2. Customer supplied volt free contact is user congured for either Inhibit Mode or Normal Operation Mode.

Priority Control: An integrated SPDT potential free dry contact (NO/NC 10A @ 240VAC) energizes when the unit is heating and

de-energizes when not heating. This feature is useful when it is desirable to give the water heater priority over
another electrical load to ensure that both are not operational at the same time.

Options

A. Inlet and Outlet Valve assembly simplies installation

and includes unions, shut offs, check valve, drain
ports and relief valve port.

B. Air Separator to clear the incoming cold water

of micro air bubbles, sand, dirt and rust.
Recommended for use with well water systems.

C. Descaler kit simplies the process of cleaning

the heater and removal of mineral deposits.

D. For heaters suitable for operation with 3 phase

voltages please see Hubbell model TX brochure.

E. Special construction features available.

Please consult factory.

F. Remote Control Display allows the heater to be

installed in a remote location. The 3" x 5" NEMA
4 display enclosure can be located up to 250'
from the heater and gives the operator full remote
control and monitoring capabilities.

Metric Conversions

Liters x 0.2641 = Gallons

Gallons x 3.79 = Liters

Gallons x 0.003785 = m

m3 x 264.2 = Gallons

1°C ∆T = 1.8°F ∆T

°F = (°C x 1.8) + 32

°C = (°F - 32) x 0.556

3

psi x 0.06896 = Bar

Bar x 14.5 = psi

psi x 6.86 = kPa

kPa x 0.1456 = psi

Kg / cm2 x 14.28 = psi

psi x 0.07 = Kg / cm

Lbs x 0.4536 = Kg

Kg x 2.2 = Lbs

2

3

13

1
2

"

12

1
2

"

2

5

16

"

16

3

16

"

14

1
4

"

1

3
8

"

16"

17"

2

5

16

"

16

3

16

"

14

1
4

"

1

3
8

"

Outline Dimensions and Model Selection

9

3 -18 KW Models (2 Element)

Hot Water

Outlet

Cold Water

Inlet

Withdrawal
Space 12"

3

1

16

KW Selection Chart

Model Number

KW Ratings

240V 220V 208V

R003-2S 3 2.5 2.2
R005-2S 4.5 3.7 3.3
R007-2S 7 5.8 5.2
R009-2S 9 7.5 6.7
R0011-2S 11 9.2 8.2
R0014-2S 14 11.7 10.5
R0016-2S 16 13.4 12
R0018-2S 18 15.1 13.5

Side View

11

"

16

9

3

"

16

"

3

1

3"

6"

Electrical knockout

3

/4" x 1" x 1

1

/4"

"

8

Pressure Drop: 3 psi @ 4 GPM Dry Weight: 16 Lbs Wet Weight: 16.5 Lbs Shipping Weight: 17 Lbs

21-27 KW Models (3 Element)

KW Selection Chart

Withdrawal
Space 12"

3

1

"

16

3"

Model Number

3"

6"

R021-3S 21 17.6 15.7
R024-3S 24 20.1 18
R027-3S 27 22.6 20.2

Side View

1

15

"

16

Electrical knockout

3

KW Ratings

240V 220V 208V

1

4

"

8

/4" x 1" x 1

1

/4"

9

3

"

16

3

1

"

8

Hot Water

Outlet

Cold Water

Inlet

Pressure Drop: 3 psi @ 4 GPM Dry Weight: 20 Lbs Wet Weight: 20.5 Lbs Shipping Weight: 21 Lbs

4

Model No.

KW Ratings at Various

Voltages

Heating Capability in GPM at oF

Temperature Rise (

o

FΔT)

Max Amps at 100% output

1 Phase Voltages

240V

220V

208V406080100

240V

220V

208V

R003-2S

3

0.51

0.34

0.26

0.20

12.5

2.52

0.43

0.29

0.21

0.17

11.4

2.25

0.38

0.26

0.19

0.15

10.8

R005-2S

4.5

0.77

0.51

0.38

0.31193.78

0.64

0.43

0.32

0.26

17.1

3.37

0.57

0.38

0.29

0.23

16.2

R007-2S

7

1.19

0.80

0.60

0.48295.88

1.00

0.67

0.50

0.40

26.7

5.2

0.89

0.59

0.44

0.35

25

R009-2S

9

1.54

1.02

0.77

0.61

37.5

7.56

1.29

0.86

0.64

0.52

34.3

6.7

1.14

0.76

0.57

0.46

32.2

R011-2S

11

1.88

1.25

0.94

0.75469.24

1.58

1.05

0.79

0.63428.2

1.40

0.93

0.70

0.56

39.4

R014-2S

14

2.39

1.59

1.19

0.965811.76

2.01

1.34

1.00

0.80

53.4

10.5

1.79

1.19

0.90

0.72

50.4

R016-2S

16

2.73

1.82

1.36

1.096713.44

2.29

1.53

1.15

0.926112

2.05

1.36

1.02

0.82

57.6

R018-2S

18

3.07

2.05

1.54

1.237515.12

2.58

1.72

1.29

1.03

68.7

13.5

2.30

1.54

1.15

0.92

64.9

R021-3S

21

3.58

2.39

1.79

1.43

87.5

17.64

3.01

2.01

1.50

1.20

80.1

15.75

2.69

1.79

1.34

1.07

75.7

R024-3S

24

4.09

2.73

2.05

1.64

100

20.16

3.44

2.29

1.72

1.38

91.6183.07

2.05

1.54

1.23

86.5

R027-3S

27

4.61

3.07

2.30

1.84

112

22.68

3.87

2.58

1.93

1.55

103

20.25

3.45

2.30

1.73

1.38

97.3

Heating Capacity and Amperage Chart

(°F ∆T)

40°F ∆T 60°F ∆T 80°F ∆T 100°F ∆T

Note:

• Alternate voltages including 277, 380, 415, 440, 575 and 600 volt available. Please consult factory for exact KW availability
in these voltages.

• For 3 phase voltages please reference Hubbell model TX brochure.

Sizing Formulas

Step 1

Variables To Solve For:

KW Requirement:

Temperature Rise:

KW x 6.824 ÷ GPM oF∆T

Flow Rate:

Step 2

Choose the Tankless model with the KW rating which meets the peak
demand (GPM) and required temperature rise (oF∆T) for your application.

Step 3

Choose the supply voltage available. Note the total amperage draw of the
unit and verify availability.

Solve for the unknown using formulas below.

GPM x oF∆T x 0.1465 = KW

KW x 6.824 ÷ oF∆T = GPM

Voltage De-Rating Factors

Rated Voltage Applied Voltage De-Rating Factor

240 V 230 V 92%

240 V 220 V 84%

240 V 208 V 75%

When the actual supply voltage (applied voltage) is different
than the design voltage (rated voltage) the resulting KW
output will be affected. Please see the chart for typical
voltage de-rating factors, or use the following formula.

Applied Voltage

Rated Voltage

2

X Rated KW = KW output at applied voltage

2

5

ISO 9 0 0 1 : 2 0 0 8

ISO

Master Specication: Point-of-Use Tankless

JOB NAME

REPRESENTATIVE

ENGINEER / ARCHITECT

CONTRACTOR

GENERAL

Provide a quantity of packaged type instantaneous electric tankless water heater(s) Model No.

as manufactured by HUBBELL Electric Heater Co., Stratford, CT. The entire unit is
packaged ready for plumbing and electrical service connections and shall bear the cULUs listing mark certifying the
entire unit to UL499, CSA C22.2 No. 64-M91 and UL EPH Sanitation listed to ANSI/NSF Standard 5.

HEATING CHAMBER

The heating chamber shall be all Sil-brazed copper and bronze construction. A plastic heating chamber shall not be
acceptable. Water heater heating chamber shall be rated for a maximum allowable working pressure of 150 psi. The
heating chamber and all electrical controls shall be completely enclosed in a heavy gauge Type 304 stainless steel
case.

HEATING CAPACITY

The tankless heater shall be rated at KW which will heat GPM of water at °F rise
( ° to °F ). Heaters that require the use of a ow restrictor or specialized aerator shall not be
acceptable.

ELECTRICAL

The heater shall be designed to operate at volts, single phase, 50/60Hz and will draw amps only
when operating at full power. The immersion heating elements shall be high quality incoloy sheathed and sized to
obtain the rated capacity. Each element is to be operated using zero cross over solid state controls. The heating
elements shall be fully modulated from 0-100% to provide precise temperature control through the full range of
ows. A Hi-Limit thermostat with automatic reset shall be factory installed to disconnect each heating element in the
event of an over-temperature condition. An electronic digital display temperature controller shall be user adjustable
in 1° increments in either °F or °C and shall display ow rate, outlet temperature, inlet temperature and provide error
indication. A turbine-type ow meter shall be factory installed to provide precise temperature control for water ows
as low as 0.2 GPM up to a maximum ow of 8 GPM. Heaters that require greater than 0.2 GPM ow for actuation or
restrict ow shall not be acceptable.

WARRANTY

Hubbell shall warranty all electrical components against defects in workmanship and material for a period of one
(1) year from date of start-up and the heating chamber for a full ve (5) years from date of start-up (for residential
service, ve (5) years heating chamber and three (3) years electrical), provided that the unit is started within three
(3) months of date of shipment and installed and operated within the scope of the heater's design and operating
capability. Labor is not covered under warranty. Each heater shall be shipped with a complete set of installation
and operating instructions including spare parts list and approved drawings. All fabrication and assembly shall be
performed in the U.S.A.

OPTIONS

In addition, the tankless electric water heater shall be supplied with the following options:

Option

Option

Option

Continuing research results in product improvement; therefore specications are subject to

change without notice. For the most updated information, consult the factory directly.

The Electric Heater Company ■P.O. Box 288 ■ Stratford, CT 06615-0288 ■ Phone: [phone] ■ Fax: [phone]

[e-mail] ■ www.hubbellheaters.com

Committed to continuous improvement...

MadeintheU.S.A.