Monitor external limits
Connections are provided on the connection board for
external limits. The SMART TOUCH control will shut off
the burner and inhibit relighting whenever any of these
external limits open.
Run-time and alarm outputs
The water heater provides dry contacts for indicating
when the water heater is running, and when it is unable to
operate.
Run-time and cycle counting
The control uses two timers to monitor the total hours of
burner operation. One timer monitors the time the unit
is firing under 50% of rate. The other timer monitors the
time the unit is firing over 50% rate.
The control uses four (4) ignition counters to monitor the
amount of unit 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 blockings. The date and time of the
occurrence will be recorded as well. Only the 10 most
current occurrences will be held in memory.
Water heater temperature regulation
Operating temperature (target)
The SMART TOUCH control module senses water
temperature and regulates water heater firing and firing rate
to achieve a target temperature. The target temperature can
be set between 70°F (21°C) and 185°F (85°C).
51
11
Operating information
(continued)
Protection features
Outlet temperature, flue temperature, and temperature
rise limiting
The outlet temperature is monitored by the water heater outlet
temperature sensor. When the outlet temperature exceeds 185°F
(85°C), the unit will reduce the fan speed. If the outlet water
temperature exceeds 195°F (90°C) the control will shut the unit
down until it cools off.
The control module monitors the flue temperature by a sensor
located in the flue exhaust. If the flue temperature exceeds 215°F
(102°C) the control will reduce the maximum fan speed. If the
flue temperature exceeds 240°F (115°C) the control will shut
the unit down. The unit will restart automatically once the flue
temperature drops 25°F (14°C) and the minimum off time has
expired.
The control monitors the temperature difference between the
inlet and the outlet sensor. If this difference exceeds 30°F
(17°C) the control will reduce the fan speed. If the temperature
difference exceeds 35°F (19°C) the control will shut the unit
down. The unit will restart automatically once the temperature
difference has dropped below 30°F (17°C) and the minimum off
time has expired.
Freeze protection
DO NOT install the water heater in a room likely to freeze.
The following integral feature of the SMART TOUCH control
module provides some protection for the water heater only --
not for the system.
•
The SMART TOUCH control module provides
freeze-up protection as follows when the water heater
water temperature drops below 45°F (7°C):
•
Below 45°F (7°C), the water heater pumps operate
constantly.
•
Below 37°F (3°C), the water heater turns on.
• Water heater and pumps turn off if water
temperature rises above 45°F (7°C).
Installation & Operation Manual
Содержание Armor X2 AWL1500
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