Lochinvar COPPER-FINN2 502 - Manual (Page 50)

50
7
Operating information
Installation & Operation Manual
Freeze protection
DO NOT install the appliance in a room likely to freeze.
The following integral feature of the SMART SYSTEM control
module provides some protection for the appliance only -- not
for the system.
• The SMART SYSTEM control module provides
freeze-up protection as follows when the appliance
water temperature drops below 45°F (7.2°C):
• Below 45°F (7.2°C), the appliance and system pumps
operate constantly.
• Below 37°F (2.7°C), the appliance turns on.
• Appliance and pumps turn off if appliance water
temperature rises above 45°F (7.2°C).
This feature of the SMART SYSTEM
control module does not eliminate the
possibility of freezing. The installer must
still use recognized design, installation and
maintenance practice to prevent freeze
potential for the appliance and system.
ƽ CAUTION
High limit operations
When outlet temperature exceeds 210°F (99°C), high limit
action occurs. The appliance shuts down until the outlet water
cools down and the RESET button on the Operator Interface is
pressed.
Monitor external limits
Connections are provided on the connection board for external
limits such as a louver proving switch. The SMART SYSTEM
will shut off the burner and inhibit relighting whenever any of
these external limits open.
Low water cutoff protection
1. The SMART SYSTEM control module uses temperature
sensing of both inlet and outlet areas of the heat exchanger.
If the flow rate is too low or the outlet temperature too
high, the control module modulates and shuts the appliance
down. This along with the flow switch, ensures appliance
shutdown in the event of low water or low flow conditions.
2. Some codes and jurisdiction may accept these integral
features of the control in lieu of requiring an additional
limit control or low water cutoff. Consult local jurisdiction
to determine. Contact manufacturer for low water cutoff
kit availability.
Run-time and cycle counting
The control uses two timers to monitor the total hours of
burner operation. One timer monitors the time the appliance
is firing under 50% of rate. The other timer monitors the time
the appliance is firing over 50% rate.
The control uses four (4) ignition counters to monitor the
amount of appliance cycles. The first counter counts all
ignitions of the control. The second counter counts only
ignition attempts that have failed. The third and fourth
counters are the same as the first and second respectively, but
can be reset by the installer.
Service reminder
The control can be programmed for service reminder
notification. This notification will become active when either a
set time frame has expired, or a set amount of running hours or
cycles has expired (all adjustable by the installer). The display
will alternate the standard text on the display screen with Service
Due every 5 seconds. The service reminder notification can be
reset by the installer.
Error logging
The control will hold in memory the last 10 error codes as
well as the last 10 turn-off functions. The date and time of the
occurrence will be recorded as well. Only the 10 most current
occurrences will be held in memory.
Pool heater temperature regulation
Operating temperature (target)
The SMART SYSTEM control module senses water temperature
and regulates appliance firing rate to achieve a target temperature.
The target temperature can be set between 40°F (4.5°C) and
105°F (40.5°C).
Run-time and alarm outputs
The appliance provides dry contacts for indicating when the
appliance is running, and when it is unable to operate.
The control monitors the temperature difference between
the inlet and the outlet sensor. If this difference exceeds the
first limit the control will turn off stages. If the temperature
difference exceeds a second limit the control will shut the unit
down. The unit will restart automatically once the temperature
difference has dropped 10°F (6°C) and the minimum off time
has expired.
RISE LIMITING
Outlet Temperature Firing Rate
Up to 180°F (82°C) Full Fire
180°F (82°C) to 185°F (85°C) Low Fire
Above 185°F (85°C) Off