Lochinvar 000 through 2 - Manual (Page 41)

41
NOTE:
Allow 10 seconds for data shown in the display screens to
update when viewing or making adjustments to any of the
six adjustable points.
POINTS FROM INFORMATION
VISIBLE FROM THE SCREEN OF
THE COMMAND DISPLAY
1. Calculated Set Point — The water temperature as
adjusted by an optional outdoor reset function
used on a heat
ing boiler only. If no outdoor reset
function is used, this displays the same
temperature as the set point. Outdoor Air Reset
function not available on a water heater application.
2. Set Point Temp — The desired water temperature
as adjusted by the owner/operator. This becomes
the lowest boiler operating temperature when an
optional outdoor reset function is used (Changeable Point
from the Com mand Display).
3. Return/Inlet Temp — The tem per a ture of the water
entering the boiler or water heater, a basic thermometer
function to display inlet water temperature.
4. Supply/Outlet Temp — The tem per a ture of the
water leaving the boiler or water heater, a basic
thermometer func
tion to display outlet water
temperature.
5. Temp. Rise — The difference be tween inlet and
outlet water tem per a ture at the boiler or water
heater to show the water temperature rise.
6. Status — Displays current status of the control as
the appliance is going through its firing sequence
and possible faults that could occur and the
condition of each. See Status Point Modes and
Alarms.
7. O.A. Lockout — The maximum out door air
temperature where the boiler will continue to
operate. When the outdoor temperature rises
above this setting, no heat should be needed for
the building and the boiler will lock
out and not
fire.
8. O.A. Max — The warmest outdoor air temperature
where the boiler reset function will begin to
function and operate the boiler at the initial
set point temperature. The boiler set point will
increase based on a cor
re spond ing drop in outdoor
temperature below this temperature.
9. O.A. Min — The coldest outdoor air temperature
where the boiler reset function will reach a
maximum boiler water temperature. No additional
reset (increase) in boiler temperature will occur
past this point as outdoor tem
per a ture continues
to drop lower (Change able Point from the
Command Display).
10. O.A. Temp. — A display of the outdoor air
temperature as sensed by the optional outdoor air
reset sensor.
11. Max. SetPoint — The maximum water temperature
the boiler or water heater may be set to operate at
(Changeable from the Command Display).
12. Min. SetPoint — The minimum water temperature the
boiler or water heater may be set to operate at. This
temperature is established in the configuration process
at the factory.
13. Total Run Time — The accumulated number of
hours that the boiler or water heater burner has
been in operation. Time is accumulated in one hour
increments and can total up to 99,999 hours before
rolling over to restart the accumulation process.
14. Sequencing Type — The type of sequencing
selected for operation of multiple units, FOFO,
FOLO, etc., when ordered as an option. See
“Sequencing Options” (Changeable Point from
the Command Display).
15. Percent Modulation — The percent of maximum
input that the burner is actually firing at. This
may vary from 25% up to 100% of rate based on demand.
16. Auxiliary Relay — The “ON” or “OFF” status of an
additional relay to in
di cate a specified function of
the unit.
17. Percent Bypass — The percent that the bypass valve is
open to allow heat
ed discharge water to be
recirculated into the inlet of the primary heat exchanger
in order to control condensate formation on the primary
heat exchanger. 0% indicates that the valve is fully
closed and 100% in di cates that the valve is fully open.
The percentage will vary with valve operation.
18. Bypass Temp. — A display of the water
temperature in the inlet to the primary heat
exchanger after being mixed with hot discharge
water from the bypass piping when the bypass
valve is open.
19. Operating Sensor — A display which indicates
the location of the operating sensor in the unit.
The operating sensor may be in the
Return/Inlet or Supply/Outlet of the boiler or water
heater (Changeable Point from the Command Display).
20. Heater Pump — The “ON” or “OFF” sta tus of the
integral circulating pump for the boiler or water
heater.
21. Heater I.D. — An indication of whether the unit
is a boiler or water heater (Changeable Point
from the Command Display).