Submittal Sheet

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Engineering

Submittal

Sheet

Bosch Thermotechnology Corp. reserves the right to make changes without notice due

to continuing engineering and technological advances |

BTC 742008301 E | 10.2014

Bosch Thermotechnology Corp.

Londonderry, NH • Ft. Lauderdale, FL

Tel: 1-866-642-3198 Fax: 1-603-965-7581 www.bosch-climate.us

C1050ES

Tankless Water Heater

1 of 7

Engineering Speciﬁ cations

The system shall consist of ___Model Greentherm C 1050

ES NG/LP tankless water heaters as manufactured by Bosch

Thermotechnology. Water Heater shall be CSA/ANSI Z21.10.3

listed. Water Heater shall have an input of 199,000 BTU/Hr with

a gross output of 184,500 BTU/Hr when ﬁ red with natural gas.

Water Heater shall operate with a 96% ANSI Z21.10.3 efﬁ ciency.

Water Heater shall have a recovery of 285 gallons per hour

at a 77°F temperature rise. Water Heater shall have Low NOx

emissions and is 2012 SCAQMD NOx certiﬁ ed to rule 1146.2.

CONSTRUCTION

Water Heater shall be gas ﬁ red, condensing tankless design

with a modulating power burner and negative pressure gas

valve. Burner shall be capable of 10:1 turndown of ﬁ ring,

without loss of combustion efﬁ ciency. Primary heat exchanger/

combustion chamber shall incorporate a multi pass copper tube

and ﬁ n design with internal turbulators. Secondary condensing

heat exchanger shall incorporate a multi-pass aluminum heat

exchanger of ﬁ n tube design with copper water path to prevent

galvanic corrosion. Heat exchangers shall be rated for

maximum working pressure not less than 150 psig.

The Water Heater shall be equipped with a computer

controlled active bypass valve that signiﬁ cantly improves water

temperature stability. On the cold water inlet connection the

Water Heater shall be equipped with an externally accessible

in-line water ﬁ lter.

The Water Heater control panel shall be a single printed

circuit board in water-resistant plastic enclosure. The entire

Water Heater control panel shall be Underwriters Laboratories

approved.

The control panel shall contain: embedded control board

incorporating LCD display to read temperature, and tactile

buttons for output power, temperature, and programming

control; CPU board houses all control functions; power

transformer; ignition spark module; and unique connections

Overview and Certiﬁ cations

Massachusetts

Plumbing Board

Approved

LOW-LEAD

Summary of content (7 pages)

PAGE 1
C1050ES Tankless Water Heater Engineering Submittal Sheet Overview and Certifications LOW-LEAD UP C ® ® C US Massachusetts Plumbing Board Approved Engineering Specifications The system shall consist of ___Model Greentherm C 1050 ES NG/LP tankless water heaters as manufactured by Bosch Thermotechnology. Water Heater shall be CSA/ANSI Z21.10.3 listed. Water Heater shall have an input of 199,000 BTU/Hr with a gross output of 184,500 BTU/Hr when fired with natural gas.
PAGE 2
Engineering Submittal Sheet C1050ES Tankless Water Heater Engineering Specifications transformer; ignition spark module; and unique connections for each sensor or component. The control board shall be field replaceable. The combustion safeguard/flame monitoring system shall utilize spark ignition and a rectification type flame sensor. The control panel hardware shall support wireless remote communications if the wireless module is installed.
PAGE 3
Engineering Submittal Sheet C1050ES Tankless Water Heater Dimensions and Connections Combustion air inlet D B Optional combustion air inlet Exhaust outlet C C Top view Top view A Hot water outlet E Cold water inlet Inlet water filter F G J H Front view C I Side view K Gas supply connection Bottom view Condensate drain Bottom view Dimensions Value Unit A B C D E F G H I J K Inches 30½ 17⅞ 5¼ 11¼ 2¾ 6⁵⁄₁₆ 2⁵⁄₁₆ 6½ 2¹⁄₁₆ 4¹⁄₁₆ 6¹⁰/₁₆ Performance Data Unit Value
PAGE 4
Engineering Submittal Sheet C1050ES Tankless Water Heater Operational Data C 1050 ES NG / Natural Gas - part number C 1050 ES LP / Liquid Propane - part number Weight Electrical voltage mains Power consumption max load Power consumption idle Unit Value − 7736501515 − 7736501517 lbs 74 VAC / Hz 120 / 60 A ≤ 2.5 mA 40 Min. Inlet gas pressure NG / LP Inch W.C. 3.5 / 8 Max. Inlet gas pressure NG / LP Inch W.C. 10.5 / 13 °F 140 Maximum Output Temperature Max.
PAGE 5
Engineering Submittal Sheet C1050ES Tankless Water Heater Required direct vent terminal clearances (twin pipe / concentric penetration) Clearance Data Item Description Value Canadian installations ¹) U.S.
PAGE 6
Engineering Submittal Sheet C1050ES Tankless Water Heater Required other than direct vent terminal clearances (single pipe penetration) 6720608836-23.1Av Clearance Data Item Description Value Canadian installations ¹) U.S.
PAGE 7
Engineering Submittal Sheet C1050ES Tankless Water Heater Water Heating Capacity Curve 13 12 11 10 9 Water Heating Capacity Data 8 Temperature Rise °F Flow 7 Rate (GPM) 6 Flow Rate GPM 35 10.7 5 45 8.3 4 55 6.8 3 65 5.8 2 75 5.0 1 90 4.2 0 10 100 3.7 120 3.1 140 2.7 20 30 40 50 60 70 80 Temperature rise (°F) 90 100 110 120 130 140 * 35°F capacity is based on installation with a mixing valve to overcome typical pressure loss through the water heater and system.