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Installation & Operation Manual
60
When the outlet temperature exceeds 200°F, the automatic high
limit action occurs. The water heater shuts down until the outlet
water temperature cools below 190°F, and a 60 second timer has
expired. If the outlet temperature continues to increase, the
manual reset high limit action will occur at 210°F.
High limit test procedure
Monitor external limits
Connections are provided on the connection board for
external limits such as flow switch, gas pressure switches,
and a louver proving switch. The SMART SYSTEM will
shut off the burner and inhibit relighting whenever any of
these external limits open.
Runtime and alarm outputs
The water heater provides dry contacts for indicating
when the water heater is running, and when it is unable to
operate.
Runtime and cycle counting
The control uses a timer to monitor the total hours of
burner operation. The timer monitors the time the water
heater is firing.
The control uses two (2) ignition counters to monitor the
amount of water heater cycles. The first counter counts all
ignitions of the control. The second counter counts only
ignition attempts that have failed.
Service reminder
The control can be programmed for service reminder
notification. This notification will become active when
either a set amount of time has expired, or a set amount of
running hours or cycles has expired (all adjustable by the
installer). The display will show a Maintenance Required
screen. The service reminder notification can be reset or
disabled by the installer.
The time dependent feature has been disabled by the
manufacturer. To enable this feature change parameter
I1 to the desired time range, reference the Armor Service
Manual for details regarding parameters.
Error logging
The control will hold in memory the last 10 lockouts 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 of each will be held in memory.
Water heater temperature regulation
Operating temperature (target)
The SMART SYSTEM 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 60°F and 190°F.
11 Operating information
1. Turn ON the main power to the water heater by placing the
ON/OFF switch in the ON position.
2. If water heater status reads [SHUTDOWN] place the water
heater into the active position by pressing the RIGHT
SELECT [ON] key.
3. Locate the pinhole (SERVICE button) below the RESET
button on the display board. Insert a thin wire (such as a
paper clip) into the hole and press the button once, hold
for five (5) seconds to place the water heater into Service
Mode. In Service Mode the water heater will fire at ignition
speed and will then modulate up to full fire.
4. From the Status Screen, press the NAVIGATION dial to
access the Set Points Screen.
5. Press the LEFT SELECT [LIMITS] key.
6. Select the manual reset high limit (MRHL) by pressing the
NAVIGATION dial.
7. Decrease the set point of the MRHL below the outlet
temperature by turning the NAVIGATION dial
counterclockwise.
8. Press the RIGHT SELECT [SAVE] key.
9. Press the RIGHT SELECT [HOME] key.
10. The new parameters will upload to the control and the
MRHL will function causing water heater shutdown and
[LOCKOUT] to be displayed.
11. Press the RESET button to clear the lockout.
12. Repeat Steps 4, 5 and 6.
13. Set the MRHL to the appropriate set point by turning the
NAVIGATION dial clockwise.
14. Repeat Steps 8 and 9.
Low water cutoff protection
1. The SMART SYSTEM control module uses temperature
sensing of both supply and return 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 water
heater down. This ensures water heater 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. A low water cutoff is available from the
factory (WTR20009).
Please note that the brackets ([]) denote
screen status.
NOTICE
High limit operations
The Armor water heater is equipped with a fixed automatic
reset hight limit and an adjustable manual reset high limit.
The automatic reset high limit has a set point of 200°F and
the manual reset high limit has a maximum set point of
210°F.