SECTION 22 33 13.02 Light Industrial C1N Series

Electric Tankless Light Industrial Water Heaters C1N Series Guide Specification

Keltech Tankless Light Industrial Water Heaters are designed to accommodate most light industrial fluid heating applications, where the demand is 18kW - 25kW and total flow is 0.75 GPM (2.8 l/m) up to 15 GPM (56.8 l/m). Standard units feature ≥ 0.75 GPM (2.8 l/m) activation, and lower flows are available. C1N-Series units are 3 Phase Delta, 480V or 600V. Low flow activation options at 0.25 GPM (1.0 l/m) and 0.50 GPM (1.9 l/m) are available. NEMA 4X and explosion proof purge system options are available.

Available for wall- or floor- mounting, Keltech Tankless Light Industrial Water Heaters range from 18 to 25 kW units. They feature shuttle type flow switches that activate a PID controller. Water heaters are equipped with Incoloy 800 sheathed low watt density heating elements and a three-mode (PID) controller with dual digital display of set-point and output water temperature.

Keltech's Light Industrial water heaters allow water supply to quickly reach the required setpoint temperatures, up to 160 deg. F (71.1 Deg. C) in as little as 20 to 30 seconds and provide a consistent flow of hot water – up to 15 GPM (56.8 l/m) continuously.

Redundant Control and Safety Features: Every Keltech Light Industrial water heater includes multiple safety features including internal fusing, digital microprocessor-based temperature control, and splash proof NEMA 4 water tight enclosures. Safety only circuits monitor for over-temperature conditions and ensure output temperature does not exceed maximum water heater allowable working water temperature.

View Keltech's complete line of innovative tankless water heaters for, continuous flow in industrial, healthcare and laboratory facilities, and specialty applications. Contact Keltech, Inc., Delton MI; Phone: (800) 999-4320) Email

Keltech eases the specifying process with a seasoned customer service staff and a range of helpful information tools on an advanced website. Keltech is a subsidiary of Bradley, the industry leader in the manufacture of safety eyewash, eye/face wash, and eyewash heaters, as well as premium quality commercial plumbing fixtures, valves, TMVs, electric tankless water heaters and washroom accessories that appear in the following CSI MasterFormat 2012™ Sections:

Section 22 11 19 - DOMESTIC WATER PIPING SPECIALTIES (Thermostatic mixing valves)

Section 22 33 13 - INSTANTANEOUS ELECTRIC DOMESTIC WATER HEATERS (Keltech tankless water heaters)



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A. Electric, tankless light industrial water heaters and water heater accessories.

Specifier: If retaining optional "Related Sections" article, edit to include sections applicable to Project.


A. Division 22 Section "General-Duty Valves for Plumbing Piping" for valves.

B. Division 22 Section "Domestic Water Piping" for water piping.

C. Division 22 Section "Domestic Water Piping Specialties" for vacuum breakers, water pressure-reducing valves, water-hammer arresters, and specialty valves.

D. Division 26 Sections for electrical power and control wiring.

Specifier: If retaining optional "References" article, edit to include standards cited in edited Section.


A. General: Applicable edition of references cited in this Section is current edition published on date of issue of Project specifications, unless otherwise required by building code in force.

B. American National Standards Institute (ANSI):

1. ANSI Z21.22 - Relief Valves for Hot Water Supply Systems

C. American Society of Heating, Refrigerating, and Air-Conditioning Engineers

1. ASHRAE/IESNA 90.1 - Energy Standard For Buildings Except Low-Rise Residential Buildings

D. American Society of Sanitary Engineering (ASSE):

1. ASSE 1003 - Performance Requirements for Water Pressure Reducing Valves for Domestic Water Distribution Systems

2. ASSE 1010 - Performance Requirements for Water Hammer Arresters

E. Canadian Standards Association/CSA Group (CAN/CSA):

1. CSA-C22.2 No. 88 - Construction and Test of Industrial Heating Equipment

F. National Electrical Manufacturers Association (NEMA)

1. NEMA Standards Publication 250 - Enclosures for Electrical Equipment (1000 Volts Maximum)

G. National Fire Protection Association (NFPA)

1. NFPA 70 - National Electrical Code

2. NFPA 496 - Standard For Purged and Pressurized Enclosures for Electrical Equipment

H. NSF International (NSF):

1. NSF 61 - Drinking Water System Components – Health Effects

2. NSF 372 - Drinking Water System Components - Lead Content

I. Underwriters Laboratories (UL)

1. UL 50E – Enclosures for Electrical Equipment, Environmental Considerations

2. UL 499 - Standard for Electric Heating Appliances


A. Product Data: For each product:

1. Manufacturer's data sheets indicating unit performance and compliance with requirements.

2. Include details of electrical and mechanical operating parts.

3. Show mounting and securing requirements and utility connection requirements.

Specifier: Retain "LEED Submittals" Paragraph and corresponding "ASHRAE/IESNA Compliance" Paragraph under Quality Assurance Article below for LEED projects.

B. LEED Submittals

1. Product Data for Prerequisite EA 2 Minimum Energy Performance: Documentation indicating that units comply with applicable requirements in ASHRAE/IESNA 90.1, Section 7, "Service Water Heating."


Specifier: Retain paragraphs below when Project requirements include compliance with Federal Buy American provisions.

A. Buy American Act Certification: Submit documentation certifying that products comply with provisions of the Buy American Act 41 U.S.C 10a – 10d.

B. Source quality-control test reports.

C. Field quality-control test reports.


A. Operation and maintenance data.


Specifier: Retain "ASHRAE/IESNA Compliance" Paragraph for LEED projects and for other projects where compliance is required by authorities having jurisdiction.

A. ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1.

B. Source Limitations: Obtain electric tankless water heaters through a single source from a single manufacturer.

C. Electrical Components: Listed and labeled per NFPA 70, Article 100, by a testing agency acceptable to authority having jurisdiction.

D. Sanitation Standard: Comply with NSF 61 for fixture components in contact with potable water.

E. Lead-Free Construction: Comply with NSF 372 for fixture components in contact with potable water.


A. Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of electric, domestic-water heaters that fail in materials or workmanship within specified warranty period.

1. Warranty Period: From Date of Substantial Completion

a. Electrical Components: Two years.

b. Heating Elements: Four years.

c. Heat Exchanger Free From Leaks: Eight years.



A. Basis-of-Design Product: Subject to compliance with requirements, provide electric tankless Light Industrial water heaters by Keltech, Inc., Delton MI. Phone: (800) 999?4320, Email:, Web site:

1. Submit requests for substitution in accordance with Instructions to Bidders and Division 01, General Requirements.


Specifier: The Bradley Keltech C1N series includes automatic reset and manual reset controls to disable the water heater if the water temperature increases to 175 deg. F (79.5 deg. C).

A. Electric tankless light industrial water heater, UL 499, sized for constant temperature duty to conform to flow requirements and maintain temperature setpoints up to 160 deg. F (71.1 deg. C), with PID Controller, liquid-cooled solid-state relays, and flow activation.

1. Basis of Design Manufacturer/Model: Keltech, Inc., Model C1N Light Industrial Heater.

Specifier: Select one of two "Enclosure" subparagraphs.

2. Enclosure: UL 50E [0.063-inch/16-ga.- (1.59-mm-) thick, NEMA 4] [0.063-inch/16-ga.- (1.59-mm-) thick stainless steel NEMA 4X].

3. Enclosure: UL 50E and NFPA 496 Explosion Proof, Class 1/Division 2: [0.063-inch/16-ga.- (1.59-mm-) thick, NEMA 4] [0.063-inch/16-ga.- (1.59-mm-) thick stainless steel NEMA 4X].

a. Mounting: [Wall mounted] [Floor mounted with leg kit].

4. Heat Exchanger: Copper tubing with brazed brass fittings and large internal passageways for minimal pressure drop. Provide NSF 61 barrier materials approved for potable water, without storage capacity.

Specifier: Retain lining and coating options below as required for deionized water or corrosive liquid processing requirements.

a. PFA-Teflon-lined Coating: FDA approved for deionized water or mild corrosive fluid applications

b. Xylan Fluoropolymeric Coating: FDA approved for food contact or deionized water

5. High Temperature Package: [Insert temperature required between 160 and 190 deg. F] [Not required].

6. Connections: 3/4 inch NPT (DN 19) inlet, outlet.

7. Pressure Rating: 150 psig (1035 kPa).

8. Flow Turn-On Point: [0.75 gpm (0.49 l/s)] [0.5 gpm (0.32 l/s)] [0.25 gpm (0.016 l/s)].

9. Heating Element: Incoloy 800 sheathed low-watt density resistive element.

10. Temperature Control: Microprocessor with PID logic and dual display of set-point and actual outlet water temperature.

11. Safety Controls:

a. Internal thermostat with auto reset high- limit switch

b. Surface mounted bi-metal thermostat with manual reset

c. Internal Fused Disconnect: [Required] [Not required].

d. Ground Fault Equipment Protection. For leakage to ground, greater than 1 amp, Door-mounted ground fault status light and reset: [Required] [Not required].

12. Capacity:

Specifier: If temperature rise/flow rate data appear on Drawings, then select "As scheduled" option. Otherwise, insert temperature rise and flow rate below from product data sheet. Temperature rise range available: 10 – 140 deg. F (6 – 78 deg. C).

High Temperature Option Setpoints Available: 160 - 190 deg. F (71.1 – 87.8 deg. C). Flow range available: 0.75 - 15 gpm (1.9 - 57 L/m).

a. Temperature Rise at Flow Rate: [___ deg F (__ deg C) at ___ gpm (__ L/m)] [As scheduled].

b. Adjustable Temperature Setpoint: [___ deg F (___ deg C)] [As scheduled].

13. Electrical Characteristics: [18] [25] kW at [480VAC/3-phase/3-wire] [600VAC/3-phase/3-wire] [As scheduled].

Specifier: Retain one or more of the following three subparagraphs that describe available options for the HL Series models.

14. Facility Controls Integration: 4: 20 mA input.


A. Provide electric tankless water heater system including the following system accessories

Specifier: Retain accessories required for project from those in subparagraphs below; coordinate with contents of other Division 22 sections.

1. Pressure and Temperature Relief Valves: Pressure and Temperature Relief Valves: [Brass] [Stainless steel, ASME rated and stamped pressure relief valve]. Adjust to pressure setting less than water heater working-pressure rating.

a. Pressure and Temperature Safety Relief Valve set to 80 psig (552 kPa).

2. Pressure-Reducing Valves: ASSE 1003.

3. Vacuum Relief Valves: ANSI Z21.22/CSA 4.4.

4. Shock Absorbers: ASSE 1010 or PDI-WH 201, Size A water hammer arrester.

5. Thread Adapters: NPT to BSPP, stainless steel.

6. Y-Strainer: [Lead Free Brass] [Stainless steel].



A. Electric, Tankless, Domestic-Water Heater Mounting:

1. Install water heaters in accordance with manufacturer's written instructions.

2. Install water heaters level and plumb, according to layout drawings and referenced standards. Insert metal shims as required to level unit and anchor to structure as recommended by manufacturer.

Specifier: Retain subparagraph below for applications where seismic design of component fastening to structure is required by authorities having jurisdiction. Consult project structural engineer for performance requirements.

a. Anchor unit in accordance with Project seismic design requirements.

3. Maintain manufacturer's recommended clearance and access dimensions.

B. Install water supply piping to each water heater, and from heater to fixture requiring hot water supply connection.

1. Install stop valves on water supply and outlet piping. Provide stop valve on each supply in readily-serviced location. Lock stop valve in OPEN position.

2. Comply with Division 22 Section, General-Duty Valves for Plumbing Piping, for stop valve requirements.

C. If shipped loose, install pressure and temperature safety relief valves on water heater. Manifold relief valve discharge as shown in manufacturer's written instructions.

Specifier: Select one of the two following paragraphs, as required by project conditions.

D. Extend relief-valve outlet line, and discharge by positive air gap above closest floor drain.

E. Install relief valve drain piping as indirect waste to spill by positive air gap into open drains or over floor drains. Install hose-end drain valves at low points in water piping.

F. Run relief valve drain piping without creating tripping hazard.

Specifier: Retain accessories in following paragraph that are required for project; coordinate with contents of other Division 22 sections.

G. Install [pressure-reducing valve with integral bypass relief valve in water heater cold water inlet piping] [and] [water hammer arrester in water-heater outlet piping], maximum outlet pressure [___ psig (___ kPa)] [as scheduled].


A. Do not energize water heater until hydrostatic testing of domestic water lines is complete. See Division 22 Section "Domestic Water Piping."

B. Test and adjust installation.

1. Set field-adjustable temperature set point of temperature-actuated controls. Adjust set point within allowable temperature range.

2. Replace defective or malfunctioning controls and equipment.

C. Clean unit surfaces, test fixtures, and leave in ready-to-use condition.





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