Heavy Duty Electric
Commercial Water Heaters
Available in 50, 85 and 120 Gallon Tank-Type Models
ꢀ
6 KW thru 81 KW
Rheem-Ruud Electric Commercial Water Heaters are suitable for general commercial
hot water applications and are also ideal for point-of-use installations. A single unit can
be used as a booster heater to satisfy the hot water requirements of commercial dish-
washers. A single temperature storage unit, when installed with a mixing valve, will
supply two temperatures in food service establishments.
Construction Features:
• System Sentinel –
Elements are directly immersed in the
water for maximum recovery efficiency
(98%) and are easily changed by sim-
ply screwing new ones into the tank.
LIFEGUARD elements feature a three
(3) year limited warranty.
immersion thermostat models employ
an element diagnostic panel, utilizing
light emitting diodes (L.E.D.), corre-
sponding to the number and location
of each heating element. This system
monitors the on-off function of the
electric heating elements.
• Full port, full flow brass drain
valve
• Long life ASME tank design –
proprietary steel formulation with
high temperature porcelain enamel to
maximize corrosion resistance result-
ing in a superior tank design.
• Minimal heat loss design –
85% of the tank surface area on all
Rheem-Ruud Commercial Electric
products are insulated with 3" of rigid
polyurethane foam insulation providing
superior insulating qualities. Unlike
other designs, Rheem-Ruud
Commercial Electrics can achieve 85%
because of the unique compact layout
of the heating elements. This results
in heat losses less than the energy
used by a 100 watt light bulb during
a 48 hour standby period!
• LIFEGUARD heating elements –
separate screw-in type elements fea-
ture a stainless steel outer sheath of
INCO-LOY 840, surrounding a
Nichrome wire filament, to resist water
chemical corrosion and burn-out even
in air or sediment…for long element
life and long life performance.
208, 240,
277 and 480
Voltages
Surface Mounted
and Immersioin
Thermostat
Models
Certifications and Ratings:
®
• Efficiency – in accordance with ANSI test procedures, these models tested
below the maximum allowable standby loss levels of ASHRAE Standard
90.1b-2001 (Part of the Federally mandated Energy Policy Act (EPact)).
Also exceeds energy efficiency codes of all states including California Energy
Commission (CEC).
• Safety and construction – These products are design certified by Underwriters
Laboratories (UL) to meet UL standard 1453 as electric booster and commercial
storage tank water heaters. All models are North Carolina code compliant.
CERTIFIED FOR A 150 PSI MAXIMUM WORKING PRESSURE
(160 PSI FOR ASME MODELS).
(With Optional
Seal Kit)
• Optional construction – ASME construction is available on immersion
thermostat models.
Continued on reverse.
Heavy Duty Electric continued.
MODEL NUMBERS
SURFACE MOUNTED THERMOSTATS
IMMERSION THERMOSTATS
Tank Capacity In Gallons
INPUT
KW
Tank Capacity In Gallons
50
85
120
50
85
120
6
9
ES50-6-G
ES50-9-G
ES50-12-G
ES50-15-G
ES50-18-G
ES50-24-G
ES50-27-G
ES50-30-G
ES50-36-G
ES50-45-G
ES50-54-G
N/A
ES85-6-G
ES85-9-G
ES85-12-G
ES85-15-G
ES85-18-G
ES85-24-G
ES85-27-G
ES85-30-G
ES85-36-G
ES85-45-G
ES85-54-G
N/A
ES120-6-G
ES120-9-G
ES120-12-G
ES120-15-G
ES120-18-G
ES120-24-G
ES120-27-G
ES120-30-G
ES120-36-G
ES120-45-G
ES120-54-G
N/A
E50-6-G
E50-9-G
E50-12-G
E50-15-G
E50-18-G
E50-24-G
E50-27-G
E50-30-G
E50-36-G
E50-45-G
E50-54-G
N/A
E85-6-G
E85-9-G
E120-6-G
E120-9-G
12
15
18
24
27
30
36
45
54
81
E85-12-G
E85-15-G
E85-18-G
E85-24-G
E85-27-G
E85-30-G
E85-36-G
E85-45-G
E85-54-G
E85A-81-GS
E120-12-G
E120-15-G
E120-18-G
E120-24-G
E120-27-G
E120-30-G
E120-36-G
E120-45-G
E120-54-G
E120A-81-GS
• Fuse type – the “G” in the model number represents Class G fuses.
• Thermostat staging – E models (Immersion thermostat) 24 kW and above (18 kW for 208V), may be ordered
with additional thermostat(s) for staging. Add “S” after fuse type designation. Recommended on 81kW models.
Example: E85-36-G becomes E85-36-GS.
• ASME construction – E models (Immersion Thermostat) may be ordered with ASME certified construction.
Add “A” after capacity designation. Example: E85-36-G becomes E85A-36-G.
• UL Sanitation compliance – all models are UL Sanitation (NSF5) compliant when equipped with the optional
ring seal kits. E(S)50 – AS38355, E(S)85 – AS38356, E(S)120 – AS38357.
• Solid state low water cut-off – E models (Immersion Thermostat) may be ordered with probe type cut-off for
field installation (AP8408).
DIMENSIONAL INFORMATION All dimensions shown in English and Metric
APPROX. SHIPPING
MODEL
WEIGHT (LBS.)
NUMBER
UNITS
inches
mm
A B C D E
STD.
ASME
E(S)50
E(S)85
E(S)120
43-5/8
26-1/4
36-1/4
32
813
17-1/4
270 lbs.
122 kgs.
320 lbs.
145 kgs.
1108
667
920
438
inches
mm
57-11/16
1465
28-1/4
718
49-1/2
1258
34
864
18-1/4
464
350 lbs.
159 kgs.
380 lbs.
172 kgs.
inches
mm
67-5/8
1718
30-1/4
768
58-3/4
1493
36
914
19-1/4
489
430 lbs.
185 kgs.
460 lbs.
209 kgs.
• System Sentinel –
D
all models employ a diagnostic panel
utilizing light emitting diodes (L.E.D.),
corresponding to the number and
location of each heating element.
L.E.D.’s are energized when the elec-
tric elements are operating. An unlit
L.E.D. pinpoints the exact location of
a non-functioning element, making
element operation diagnosis simple
and positive.
1 1/2
"
HOT OUTLET
NIPPLE
B
E
T&P
SYSTEM SENTINEL
A
C
The minimum distance to provide
adequate clearance for protection of
combustible material is 0 inches from
jacket and 18 inches from access door.
However, additional clearance for
accessibility to permit inspection and
servicing such as removing heating
elements or checking controls must be
provided. All models are approved for
installation on combustible flooring.
AUTOMATIC
36 1/8
"
TEMPERATURE
CONTROL
(917mm)
(IMMERSION ONLY)
1 1/2
"
COLD INLET
NIPPLE
4 3/4
"
5"
(127mm)
(121mm)
Heavy Duty Electric continued.
Other Features:
• Integral Fusing –
• Terminal Block –
all models have integral fusing for each element.
all models are equipped with U.L. listed terminal
blocks for simplicity of installation. The terminal
block will accept either copper or aluminum field
connect wire.
• Anode Rods –
two (2) magnesium anodes are installed in each tank
to ensure long life and corrosion resistance.
• 120 Volt Control Circuit –
• Temperature and Pressure Relief Valve –
AGA/ASME rated and factory installed.
all units are furnished with a fused 120 volt control
circuit. All controls (thermostats, high temperature
limit, etc.) are operated off of this basic 120 volt
control circuit. This circuit is created by an internal
multi-tap transformer of unique design that has four
(4) taps for the primary voltages, 208, 240, 277
and 480.
• Electrical Connections –
pre-wired, accessible control box with multiple knock-
outs on side in size selections to match the National
Electric Code. Sizes range from 1/2" to 2". A ground-
ing screw is provided for attaching an equipment
grounding conductor.
• Water Connections –
• Single Panel Control Box –
with hinged door, provides immediate access to all
electrical components and elements.
hot outlet and cold inlet are 1-1/2" NPT dielectric
nipples which prevent excessive turbulence of heated
water and results in optimum tank draw.
Recommended Specifications:
Water heater(s) shall be model ________________, manufactured by RHEEM-RUUD, having electrical input of __________
kW and a recovery rate of _____________ GPH at a 100°F temperature rise. Water heater(s) shall have a storage capacity of
___________ gallons. Water heater(s) shall have the UL seal of certification and be factory equipped with an AGA/ASME rated
temperature and pressure relief valve. Tank(s) shall have a double coating of high temperature porcelain enamel and furnished
with magnesium anode rods rigidly supported. Water heater(s) shall meet or exceed the standby loss requirements of
ASHRAE Standard 90.1b-2001. Tank(s) shall have a working pressure of 150 psi, and shall be completely assembled. Water
heater(s) shall be approved-listed and constructed in accordance with UL Sanitation (NSF5). Water heater(s) shall be equipped
with LIFEGUARD “screw-in” type elements featuring a stainless steel outer sheath of INCO-LOY 840 material. Tank shall be
insulated with 3" of rigid polyurethane foam insulation. Water heater(s) shall be constructed with a SYSTEM SENTINEL
element diagnostic panel utilizing light emitting diodes. Each LED will correspond to the number and location of the heating
elements and monitor their on-off function. Water heater(s) shall be provided with internal power circuit fusing, control circuit
fusing, magnetic contactors, 120 volt control circuit transformer and surface mounted thermostat or immersion thermostat(s)
with manual reset high limit control. 1-1/2" inlet and outlet water connections shall be provided. Water heater(s) shall be
covered by a three year limited warranty against tank leaks.
Add for ASME construction
Water heater(s) shall be constructed in accordance with the requirements of the ASME Boiler and Pressure Vessel Code,
Section IV Part HLW.
Limited Warranty:
This product features a three year limited warranty against tank leaks. Please refer to Commercial Warranty Information
brochure for complete warranty information.
C O M M E R C I A L
W A T E R H E A T E R S
In keeping with its policy of continuous progress and product improvement, Rheem-Ruud reserves the right to make changes without notice.
Rheem Canada Ltd./Ltée,128 Barton Street West, Hamilton, Ontario L8N 3P3
PRINTED IN U.S.A
02/06 WP
FORM NO. RR102CE-1 Rev. 12
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