LAARS IGE-199C-5(N,X) - Service Manual - Manual (Page 5)

I - GENERAL INFORMATION
This tankless water heater is a high output, high efficiency appliance, which heats the water
continuously as hot water is being drawn for use. Unlike tank type storage water heaters, this water
heater does not store hot water. The burner operates whenever there is a demand for hot water and
is off when the water flow stops. Hot water is continuously supplied for any length of time required,
as long as the specified flow rates are not exceeded. There is no need to set the temperature higher
than required for sufficient capacity. The water heater has sufficient capacity to supply several hot
water faucets simultaneously. The hot water flow capability will be dependent upon the temperature
of the outlet water selected. Operational features of this water heater include:
• This water heaters is designed to be installed outdoors on an outside wall using the
supplied wall bracket. No indoor space is needed and the water heater can be
mounted at a height convenient for servicing.
• The burners ignite by direct spark ignition within 3 seconds of detecting minimum
operational water flow. There is no standing pilot.
• A variable speed combustion air blower forces the combustion air supply into the
burner compartment.
• No venting system required. For outdoor installation only.
• An optional recess box is available which allows the water heater to be recessed into
an outside wall and conceal the piping behind a cover for a more attractive installation.
The box enclosure dimensions are: 40 1 ⁄
2
" H x 14 3 ⁄
4
" W x 9 1 ⁄
2
" D. Contact your supplier
to order this optional accessory.
• The burner flame is continuously monitored and modulated to match the heating
requirements of the water flow. Temperature and flow sensors continually monitor the
water flow and outlet water temperature and adjust the burner and combustion air
blower to maintain temperature.
• The included, remote mount Main Control may be conveniently located near the point
of use and is adjustable from 96-160°F for residential models or 96-180°F for
commercial models. In addition to the Main Control, up to two optional bathroom
controls are available on the residential models for setting the temperature in the
bathroom fixtures up to 120°F.
• The Remote Main Control also displays fault codes if the water heater malfunctions to
assist with servicing the water heater.
• The heat exchanger coil is provided with anti-freeze heaters for cold climate conditions
for protection as low as -30°F (-34°C). Drain solenoids should be installed to drain the
water heater in the event of a power failure. (See installation instructions)
Tools Required for Troubleshooting
Multifunction Digital Test Meter with needle point test leads.
Long reach (12") Magnetic Phillips screw driver (#2 Tip).
3/16 Allen wrench.
Small (pocket size) blade screw driver.
Monometer or Magnehelic inches water column gage.
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