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TANKLESS
WATER HEATERS
Models & Prices
Tankless Water Heater Product Guide
Description / Specification
Tankless Water Heater Applications
Residential / Commercial
Tankless Water Heater Electrical Guide
Service Calculations
Tankless Water Heater Installation
Plumbing / Electrical
Tankless Water Heater Cost Comparisons
Reports / Listings
Tankless Water Heaters Service Guide
Remove / Repair
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Functional
Checks
After the initial start-up,
following the Pre-Power and Operational Checks described in the Electrical
Tankless Water Heater Installation section of this manual, it may be necessary to make adjustments
to the system to insure that the heater is functional and providing hot
water.
Beeps & Flashing Lights —
What do they Mean?
It is normal
at start-up or any time the heater is powered-on for the control board
to beep and the LED to flash red and then green. Normal status of the
heater is for the control to flash all green repeatedly. The initial 2
to 4 red flashes and beeps after power-on are normal, but should not continue.
SEISCO Provides On-Board Self Diagnostics
However,
in the event that the LED light continues to flash a red sequence after
power-on, then there may be a need for further investigation. The heater’s
control provides self diagnostics by emitting a red flashing code. The
code definitions and possible solutions can be found in the Trouble
Shooting section of the Seisco Service Manual.
Some of the most common problems discovered
during Tankless Water Heater Installation and initial start-up are as follows:
- Circuit breakers are not turned-on
(especially, heaters with multiple circuits)
- Incoming power wires to the heater
are out-of-phase (heaters with multiple circuits)
- Water supply valve not turned-on,
no water in the heater chamber
- Water supply lines are reversed;
hot and cold reversed
- Water supply connection(s) are leaking
- T&P Relief Valve (where required
by local code) is leaking or stuck open
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The Seisco Heater Alerts the User of
Water Leaks!
Diagnostic codes
are designed to tell the installer or user if there is a problem and what
the problem might be. Also, the Seisco heater has a built in alarm that
will sound if there is water leaking onto the heater, possibly from a
leaky water line connection or from a leaky T&P Relief Valve. It is
important to turn off all of the circuit breakers to the heater whenever
a leak is detected to prevent possible damage to the control board. After
the leak is discovered and repaired, it is important to dry any moisture
or water accumulation on the heater. This can be done with a standard
household hair dryer or dry towels. Any attempts to dry the heater should
be done with all the power off to the heater.
System Match — Faucets and Heater
When
a Seisco heater is selected for the home or building, the faucets should
be selected to match the flow rating and temperature rise specifications
of the heater. Seisco heater specifications can be found in the Product
Description and Specifications section of this manual. Sometimes,
this is overlooked and the user discovers that the faucets in the home
are a higher flow rate than the design of the Seisco model(s) selected.
Solutions for High Flow Applications
Another
oversight may be the lifestyle of the user. For instance, if the user
wants to take two showers at the same time or run the washing machine
and the bath tub at the same time, then the flow rate demands of the water
heater are increased, sometimes beyond the capability of the Seisco heater.
Multiple Seisco heaters are used for higher flow applications, such as
for multiple task lifestyles, whirl pool and Jacuzzi tubs and body spa
showers as well. Refer to Product Applications and Diagrams section
of this manual for recommended multiple Seisco heater arrangements. Note,
it is important to evaluate the electrical capacity of the home or building
when selecting multiple Seisco heaters for a high flow application. Refer
to the Electrical Service Requirements and Sample Load Calculations
section in this manual.
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Typical Flow USE Rates
in Gallons per Minute (gpm)
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Fixture
Type
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Lavatory
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Bathtub
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Shower
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Kitchen
Sink
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Pantry
Sink
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Laundry
Sink
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Dish-
Washer
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Flow Rates
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0.8 — 1.5
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2.0 — 4.0
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1.5 — 3.0
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1.0 — 1.5
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1.5 — 2.5
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2.5 — 3.0
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2.0 — 3.0
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Temperature Adjustment
After
the Seisco heater has been installed and the operational checks are completed,
the output of the hot water can be measured and adjusted if necessary.
The temperature adjusting knob can be found on the left side of the control
board. The factory setting is usually between 117 and 120 degrees F. The
knob will usually be in the 2 to 3 o’clock position. Turning the
knob to the left decreases the temperature and turning it to the right
increases the temperature. Note: it is important to understand the effects
of increasing the temperature above the factory setting as follows:
- The heater will use more power to
heat the water; energy savings are reduced.
- There will be a greater chance that
the heater will produce scaling and sediment build-up.
- The heater may not have the power
to achieve temperatures higher than factory settings.
- Safety; with higher temperatures,
there will be a higher risk of scalding and personal injury.
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