SPACE SAVER SSETU Series Point of Use Electric Tankless Installation Guide

: September 14, 2024
: SPACE SAVER

Table of Contents

SPACE SAVER SSETU Series Point of Use Electric Tankless
EASY INSTALLATION
ONBOARD SELF-DIAGNOSTICS & TROUBLESHOOTING
WARRANTY
PRODUCT SPECIFICATIONS
DIMENSIONS
INSTALLATION
ORIENTATION & CLEARANCE
Read User Manual Online (PDF format)
Download This Manual (PDF format)

SPACE SAVER SSETU Series Point of Use Electric Tankless

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

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.

Volts| kW| 25°F| 30°F| 35°F| 40°F| 45°F| GPM AT TEMPERATURE RISE

50°F 55°F 60°F

| 65°F| 70°F| 75°F| 80°F| 85°F
---|---|---|---|---|---|---|---|---|---|---|---|---

120V

| 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
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.

DIMENSIONS

DIMENSIONS – SHIPPING

Models| Width

in (cm)

| Height

in (cm)

| Depth

in (cm)

| Weight

lb (kg)

1.75kW – 5.5kW| 11.25 (28)| 15.5 (38)| 8 (20)| 6.0 (2.7)
7.0kW – 11kW| 11.25 (28)| 15.5 (38)| 8 (20)| 8.0 (3.6)

INSTALLATION

ORIENTATION & CLEARANCE

All models must be oriented with the inlet and outlet facing upward.
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.

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.