A.O. Smith HUC-40, HUR-40, HUC-50, HUR-50, HURT-50L User Manual

PROLINE® MASTER ULTRA-LOW NOx

COMMERCIAL-GRADE RESIDENTIAL

COMMERCIAL-GRADE

RESIDENTIAL GAS WATER HEATERS

INTELLIGENT CONTROL LOGIC

• The internal microprocessor provides
enhanced operating parameters and tighter
differentials for precise sensing and faster
heating response to optimize performance.

• Uses a thermopile to generate the power
needed to operate the electronic gas control
without requiring an external power source

• The electronic gas control incorporates an
LED status indicator that monitors system
operation & service diagnostics.

HIGH UNIFORM ENERGY FACTOR (UEF)

• Eco-friendly non-CFC foam insulation, heat
traps and specially designed combustion
chamber combine to produce a high UEF for
maximum savings on operating costs.

GREEN CHOICE® GAS BURNER

• Enhanced Ultra-low NOx burner complies
with SCAQMD Rule 1121 and other air
quality management districts with similar
requirements for NOx emissions of less than
10 ng/J.

DYNACLEAN™ DIFFUSER DIP TUBE

• Helps reduce lime and sediment buildup and
maximizes hot water output. Made from
long-lasting PEX cross-linked polymer.

COREGARD™ ANODE ROD

• Our anode rods have a stainless steel core
that extends the life of the anode rod
allowing superior tank protection far longer
than standard anode rods.

• ProLine® Master products have increased
anode protection with either longer, or
multiple anodes depending on model.

PUSH-BUTTON PIEZO IGNITOR

• Makes lighting the pilot fast and easy with
one-hand push-button spark ignition.

HEAT TRAP NIPPLES

• Factory-installed for faster installation

BLUE DIAMOND® GLASS COATING

• Provides superior corrosion resistance
compared to industry standard glass lining.

• Blue Diamond® Glass coating blend is
formulated in the same lab that creates
the protection for our industry-leading
commercial product line.

ENHANCED-FLOW BRASS DRAIN
VALVE

• Our residential water heaters have a solid
brass, tamper resistant, enhanced-flow, ball
type, drain valve.

• Uses a standard female hose fitting that
allows for fast and easy draining during
maintenance.

• Designed for easy operation, this valve
includes an integral screwdriver slot that
features a ¼ turn (open/close) radius, which
not only permits full straight-through water
flow but also a quick and positive shut off.

CODE COMPLIANCE

• Meets UBC, CEC and HUD National Codes.

• Meets the thermal efficiency and standby
loss requirements of the U.S. Department of
Energy and current edition of ASHRAE/IES

90.1.

• Complies with the Federal Energy
Conservation Standards effective April 16,
2015, in accordance with the Energy Policy
Conservation Act (EPCA), as amended.

CSA CERTIFIED AND ASME RATED T&P
RELIEF VALVE

• Top-mounted T&P relief valve available as
option.

DESIGN-CERTIFIED BY CSA
INTERNATIONAL

• Certified at 300 psi test pressure and 150
psi working pressure. Listed according to
ANSI Z21.10.1-CSA 4.1 standards governing
storage tank-type gas water heaters.

8-YEAR LIMITED TANK AND PARTS
WARRANTY

© May 2017 A. O. Smith Corporation. All rights reserved.

www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015

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