SPACESAVER SSETU-18K Point Of Use Electric Tankless Owner’s Manual

SSETU-18K Point Of Use Electric Tankless

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Product Specifications

Model Number| Voltage (V)| Number of Elements| Total Input Wattage (kW)| Wattage per Element| Total Current Draw (Amps)| Recommended Canada Circuit Breaker Size (Amps)| Conductor Size (AWG)| Activation GPM
---|---|---|---|---|---|---|---|---
SSETU-18K| 120| 2| 1.75| 0.88| 14.58| 20| 14| 0.17

Product Usage Instructions

Installation

Ensure the minimum clearances are maintained during
installation:

• Front Clearance: 15+ inches (38.1+ cm)
• Side View: 12 inches (30.5 cm)

Orientation & Clearance

Properly orient the unit with hot and cold water connections as
indicated:

Frequently Asked Questions (FAQ)

Q: What is the warranty on the product?

A: The product comes with a standard warranty. For detailed
warranty information, please refer to the warranty documentation
provided.

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POINT-OF-USE ELECTRIC TANKLESS
COMMERCIAL/RESIDENTIAL

EASY INSTALLATION
· Compact size perfect for point-of-use applications close to fixtures
· Mounts easily to the wall · No venting required · ½” NPT water connection · No T&P valve required (check local
codes)
WIDE ARRAY OF MODELS AND MODES OF OPERATION
· 1.75kW ­ 3.5kW, 120V · 3.5kW ­ 11kW, 240V (208V) · Single Phase, 50/60 Hz · Two mode options, easy switching · Lavatory mode, default 105°F; temp
range 80°F ­ 149°F · Emergency eye wash mode, 85°F
ONBOARD SELF-DIAGNOSTICS & TROUBLESHOOTING
· Onboard self-diagnostics to monitor performance and protect the unit
· Bright LED display for status updates and making system selections and adjustments
· Error codes for troubleshooting and faster resolution

HIGHLY EFFICIENT & RELIABLE THERMOSTATIC DESIGN
· On-demand water heater capable of supplying endless hot water when appropriately sized
· Ultra-low activation of 0.17 GPM min.
· Energy efficiency 0.91 UEF or higher
· Dry-fire protection to prevent premature element failures
· Secondary temperature regulation to limit hot water output appropriate for use with hand or eye washing applications
· Scale detection (Patent Pending) and easy maintenance for extended service life of the heater
CONSTRUCTION
· Housing ­ Bayblend® FR3010 plastic, dark gray
· Chamber Material ­ Entec Nylon, glass-filled
· Sheathed copper elements for longer life
WARRANTY
· 6-Year limited warranty on chambers
· 1-Year limited warranty on all parts
· For complete information, consult the written warranty

Page 1 of 4 1-888-599-2837 Toll-free Canada | A. O. Smith Enterprises Ltd. | 599 Hill Street West | Fergus, ON N1M 2X1 ©2024 A. O. Smith Enterprises Ltd.

SET506N (07-24)

POINT-OF-USE ELECTRIC TANKLESS
COMMERCIAL/RESIDENTIAL

PRODUCT SPECIFICATIONS

Model Number

Voltage (V)

Number of Elements

Total Input Wattage (kW)

Wattage per Element

Total Current Draw (Amps)

Recommended Canada Circuit Breaker Size (Amps)

Conductor Size (AWG)

Activation GPM

SSETU-18K

120

2

1.75

0.88

14.58

20

14

0.17

SSETU-24K

120

2

2.40

1.20

20.00

25

12

0.17

SSETU-30K

120

2

3.00

1.50

25.00

35

10

0.17

SSETU-35K

120

2

3.50

1.75

29.17

40

10

0.17

SSETU-35E

240+

2

3.50

1.75

14.58

20

14

0.17

SSETU-45E

240+

2

4.50

2.25

18.75

25

12

0.17

SSETU-55E

240+

2

5.50

2.75

22.92

30

10

0.17

SSETU-70E

240+

4

7.00

1.75

29.17

40

10

0.17

SSETU-90E

240+

4

9.00

2.25

37.50

50

8

0.17

SSETU-110E

240+

4

11.00

2.75

45.83

60

8

0.17

Copper conductors only. All wiring/conductors must be rated for 90°C or greater. + This model may be connected to a 208 VAC supply with reduced power output. Connection to 208 VAC may require different breaker and/or wire size than shown in the table. NOTICE: Incoming line voltage variations may result in nuisance breaker trips. Contact Technical Support if there are multiple breaker trips when the recommended breaker size is in use.

GPM AT TEMPERATURE RISE

Volts

kW

25°F 30°F 35°F 40°F 45°F 50°F 55°F 60°F 65°F 70°F 75°F 80°F 85°F

1.75kW 0.47 0.39 0.33 0.29 0.26 0.23 0.21 0.20 0.18 0.17

–

–

–

2.4kW

0.64 0.54 0.46 0.40 0.36 0.32 0.29 0.27 0.25 0.23 0.21 0.20 0.19

120V

3kW

0.80 0.67 0.57 0.50 0.45 0.40 0.36 0.33 0.31 0.29 0.27 0.25 0.24

3.5kW

0.94 0.78 0.67 0.59 0.52 0.47 0.43 0.39 0.36 0.33 0.31 0.29 0.28

3.5kW

0.94 0.78 0.67 0.59 0.52 0.47 0.43 0.39 0.36 0.33 0.31 0.29 0.28

4.5kW

1.20 1.00 0.86 0.75 0.67 0.60 0.55 0.50 0.46 0.43 0.40 0.38 0.35

240V (208V)

5.5kW

1.47 1.23 1.05 0.92 0.82 0.74 0.67 0.61 0.57 0.53 0.49 0.46 0.43

7kW

1.87 1.56 1.34 1.17 1.04 0.94 0.85 0.78 0.72 0.67 0.62 0.59 0.55

9kW

2.41 2.01 1.72 1.50 1.34 1.20 1.09 1.00 0.93 0.86 0.80 0.75 0.71

11kW

2.94 2.45 2.10 1.84 1.63 1.47 1.34 1.23 1.13 1.05 0.98 0.92 0.87

Cold water inlet temperatures raised to 105°F setpoint.

Page 2 of 4 1-888-599-2837 Toll-free Canada | A. O. Smith Enterprises Ltd. | 599 Hill Street West | Fergus, ON N1M 2X1 ©2024 A. O. Smith Enterprises Ltd.

SET506N (07-24)

POINT-OF-USE ELECTRIC TANKLESS
COMMERCIAL/RESIDENTIAL

DIMENSIONS Front View

1.03″ (2.62 cm)

Side View
5.11″ (12.98 cm)

2.29″ (5.82 cm)

°F °C
ENTER

12.22″ (31.04 cm)
11.25″ (28.58 cm)

12.22″ (31.04 cm)

7.65″ (19.43 cm)

Top View

2.20″ (5.59 cm)

4.77″ (12.12 cm)

1.24″ (3.15 cm)

5.11″ (12.98 cm)

2.29″ (5.82 cm)
2.45″ (6.22 cm)

7.65″ (19.43 cm)

DIMENSIONS ­ SHIPPING Models 1.75kW – 5.5kW 7.0kW – 11kW

Width
in (cm)
11.25 (28)
11.25 (28)

Height
in (cm)
15.5 (38)
15.5 (38)

Page 3 of 4 1-888-599-2837 Toll-free Canada | A. O. Smith Enterprises Ltd. | 599 Hill Street West | Fergus, ON N1M 2X1 ©2024 A. O. Smith Enterprises Ltd.

2.29″ (5.82 cm)
2.45″ (6.22 cm)

Depth
in (cm)
8 (20)
8 (20)

Weight
lb (kg)
6.0 (2.7) 8.0 (3.6)
SET506N (07-24)

POINT-OF-USE ELECTRIC TANKLESS
COMMERCIAL/RESIDENTIAL

INSTALLATION
Wall
Side View

12″ (30.5 cm)

MINIMUM CLEARANCES Front View

Wall or adjacent object

Front Clearance: 15″ + (38.1 cm +)

8″ (20.3 cm)

12″+ (30.5 cm +) Drain Pan

Drain Pan Floor

°F °C
8″
ENTER
(20.3 cm)
12″+ (30.5 cm +)

ORIENTATION & CLEARANCE
· All models must be oriented with the inlet and outlet facing updward. · Top clearance ­ a minimum of 12 inches (30.5 cm) to provide access
for plumbing connections. · Side clearance ­ a minimum of 8 inches (20.3 cm) to remove the screws
and protective cover and to provide access for electrical wires to enter through the side of the unit. · Bottom clearance ­ a minimum of 12 inches (30.5 cm) for access to and maintenance of heating elements. Do not store any items beneath the water heater. · Front clearance ­ a minimum of 8 inches (20.3 cm). In the absence of a door or removable access panel in front of the heater, allow a minimum of 15 inches (38.1 cm) for cover removal and ease of service.

Hot

Cold

°F °C
ENTER

For Technical Information call 1-888-599-2837. A. O. Smith Enterprises Ltd. reserves the right to make product changes or improvements without prior notice.

Page 4 of 4 1-888-599-2837 Toll-free Canada | A. O. Smith Enterprises Ltd. | 599 Hill Street West | Fergus, ON N1M 2X1 ©2024 A. O. Smith Enterprises Ltd.

SET506N (07-24)

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