Specification Sheet

Keltech
®
SNA-Series - Safety Shower Heaters
Tankless Water Heating Solutions
© 2017 Bradley
P.O. Box 309, Menomonee Falls, WI 53052-0309
800 BRADLEY (800 272 3539) [phone]
bradleycorp.com
Page 1 of 5 12/6/2017
This information is subject to change without notice.
Bradley_Keltech_SNASeries
• 36 - 144 kW (122,800 - 491,300 BTUs)
• Temperature overshoot purge system
• Certified Lead-Free Design
• NEMA 4 enclosure standard
• ASME and NB Certified options available
• New & Improved Pressure Drop Advantage
• Dual Flow Activation
• Variable Temp Heat Exchanger
• Liquid-Cooled Solid State Relays
• Internal fusing (included) adds safety and permits single power connection
• Controller-locked temperature setting, output fixed at 80°F (27°C)
• Meets ANSI/ISEA Z358.1 standards
• Emergency stop button
• Door cutoff switch
Standard Equipment
Tankless Water Heating Specifications
Keltech, Inc. Tankless Shower Heaters provide warm water intended to supply safety
fixtures. The heaters uniquely perform in applications with low line pressure, while still
accommodating ANSI standard flow rates. Standard units: activation flow ≥1.5 GPM. The
durable components withstand higher pressures which result in longer service life, while
ensuring the delivery of precise output temperature. Keltech's durable components withstand
power abnormalities found in industrial environments and ensure tepid water standards are
never exceeded (100°F) with it's three-tier anti-scald protection and hot water purge. SNA-
Series units are also suited to applications with 3 Phase Delta 480V or 600V, 50/60 Hz. The
heat exchanger features o-ring seals that out last typical gasket construction. 1-1/4" NPT
female inlet and outlet connections. Keltech Tankless systems do not require the installation
of an emergency thermostatic mixing valve.
Construction
Temperature Controller
Keltech's PID Temperature Controller is more energy efficient and reliable than traditional
microprocessors using staged elements. Power is infinitely variable, with no fixed inputs.
The PID controller makes it possible to modulate the amount of power applied to the
elements while also dispersing the required power evenly across all elements. This unique
feature increases the product's life cycle.
Heating Element
Each heater features a heavy duty, low watt density, incoloy 800 sheathed resistive
element. The Keltech design ensures greater protection, durability and resistance
to scaling from hard water because water is only heated when flowing; this means
sediment will not collect in the heat exchanger.
Solid State Relays
The liquid cooled solid state relays provide silent switching, which has a fast response and works
in conjunction with the PID controller to infinitely modulate and add to the life of the heater.
Electrical
The SNA-Series requires only one service feed per unit. Includes internal fusing as
standard. Internal fusing provides superior protection so the incoming circuit can be
higher than 48 amps (NEC). Keltech protects each heating element with fusing.
Cabinet Enclosure
The floor-mounted standard cabinet enclosure is NEMA 4 rated and made from 14 gauge
mild steel and powder coated with ANSI 61 gray, corrosive resistant paint. The NEMA 4X
enclosures are corrosion resistant for harsher environments and made from 16 gauge 304
stainless steel. The NEMA 4X enclosure can also be specified with 316 stainless steel.
Additional service access panel located on top of cabinet enclosure.
Independent Safeties
Each heater has three-tier anti-scald protection and hot water evacuation (overshoot purge
protection). The controller alarm sends a signal to disconnect power to the elements if
the temperature reaches 90°F (32°C). The internal thermostat with auto reset high limit
switch ensures that when the temperature limit is reached, the unit will power down a bank
of elements; when the temperature returns to the set point, power is restored. The surface
mounted bi-metal thermostat with manual reset acts as a fail-safe and must be manually
reset before power can be restored to the elements if the temperature limit is exceeded.
TepidGuard
™
is an anti-scald feature, standard on all SNA-Series Safety Shower Heaters. This
overshoot purge will automatically open and purge excess temperature water. This feature
actively monitors temperature within the heater while operational. It also passively monitors
water temperature while the heater is inactive. This is beneficial for outdoor installations
where sun and weather can cause water temperature to exceed ANSI standards.
Temperature Safety Values:
Internal thermostat with auto reset high limit switch: 95°F (35°C)
Surface mounted bi-metal thermostat with manual reset: 100°F (38°C)
Overshoot purge: 95°F (35°C)
Dual Flow Activation
Keltech Safety Shower heaters have a dual flow activation. The low flow activation is used with
eyewashes, eye/face washes, and drench hoses. The high flow activation is for safety shower
usage. This allows just the right capacity of heated water to be used for each application.
Code Compliance and Certifications
Lead-Free
Products marked with the Lead-Free logo comply with the Safe Drinking Water
Act (SDWA) requirements of a weighted average of less than 0.25% lead content
on wetted surfaces of pipes, pipe fittings, plumbing fittings, and fixtures.
ETL listed to UL499
ETL listed to UL 50E
ETL listed to NFPA 496 (Requires EXP2CFPM Option)
cETL listed to CSA-C22.2 No. 88
Standard product selections contained within this document are third party
CERTIFIED to NSF/ANSI 372 meeting the Lead-Free content requirement. Any
product configured with custom options will be COMPLIANT with NSF/ANSI 372
meeting the Lead-Free content requirement.
ASME Certification available. Keltech units 58kW (200,000 btu)
and higher are the only electric tankless water heaters National
Board certified with the HLW stamp (Requires HLW Option).
Compliant to NEC/NFPA 70 and Canadian Electrical Code C22.1.
Protected by one or more of the following patents: 7,007,316 B2; 7,243,381 B2.
®
Certified to
NSF/ANSI 372