LAARS EBP 175 MBTU/h - Installation, Operation and Maintenance Instructions - Manual (Page 28)

Page 28 LAARS Heating Systems
de construction doivent également être respectées.
Lors de la redimension de toute partie du système
de ventilation commun, le système de ventilation
commun doit être redimensionné pour approcher la
taille minimale comme celle déterminée dans la partie
en rapport de la plus récente publication des codes
d’installation ci-dessus références.
7.2 Filling the System
1. Open all supply and return valves.
2. Fill heating system to minimum operating
pressure 12 psig.
3. Loosen screw in coin vent and allow any trapped
air to escape. Collect any water that escapes so
that it does not drip on the blower electronics
and damage them. Small amounts of air that
may remain will be purged by the internal pump.
Tighten screw after purging.
It is helpful, for air removal, to manually open
the lever on the anti-condense valve. The “manual
operation” lever located on the top of the valve
operator requires moderate pressure to latch the valve
open and then again to unlatch it and allow it to close.
4. Purge all lines by opening vents.
5. Close gas shutoff valve located above gas valve.
6. Turn on 120 volt power, the display will initially
display [---] for five seconds before displaying
[ OFF].
7. If the temperature sensor detects a temperature
below 39°F (4°C) it will display [ ICE]. The
appliance will then be in its Low Temperature
Mode. The Endurance will call for the pump
to run for 5 minutes, or until the discharge
temperature reaches 45°F (7°C). When the
internal zone valve is manually opened, the
water will be allowed to be pumped to the space
heating system, if the system zones are also open.
This is a good time to ensure that the system is
fully discharged of all air and the water charge
pressure is correct.)
8. If the display remains at [ OFF], press the on/
off button on the boiler control. The Endurance
will respond to any calls for heat it has (DHW,
tank charge, or space heating). The appliance
will attempt to ignite three times after which it
will lock out and display [ LO]. The fan and the
pump will then stop. Ensure that the system is
fully discharged of all air and the water charge
pressure is correct.
9. Turn the main electrical supply off.
10. Manually reset the internal zone valve to its
normal position.
11. System is now ready for operation.
7.3 Firing Burner
1. Be sure the system has been filled properly and is
leak tight.
2. Open gas shutoff valve.
3. Turn on main electrical switch.
4. If the temperature sensor detects a temperature
below 39°F (4°C) it will display [ICE]. The
appliance will then be in its Low Temperature
Mode.
5. If the display shows “OFF”, press the on/
off button on the front upper left of the boiler
control.
6. If the boiler had been locked out, the reset button
on top of the Endurance will need to be pressed.
7. When there is a call for heat, the pump and
the blower will start, the display will show the
supply temperature. The appliance will attempt
to ignite three times, if ignition is not successful,
the appliance will lock out and display “LO”.
Ignition reset is done by pressing the reset button
on top of the control panel. Endurance will
continue to operate until the 20 gallon transfer
tank is up to temperature.
8. Turn on a hot water tap. This puts the appliance
in the DHW mode.
Caution
Should any pronounced odor of gas be
detected, or if the gas burner does not appear
to be functioning in a normal manner, close
main shutoff valve, do not shut off switch, and
contact your heating contractor, gas company,
or factory representative
You MUST check flame monitoring control
(ignition system safety shut-off device).
9. Close gas shutoff valve with burner operating.
10. The gas valve status light will go out, and
immediately a new trial for ignition will begin.
The burner will not relight, because the gas is off.
The control will make two more attempts to light
the burner. Ignition will not occur, as the gas is
off. The boiler will lockout, and the display will
show “LO” after the gas valve has closed on the
third ignition attempt. The ignition control LED
will show a three-flash sequence.
11. Open gas shutoff valve. Press reset button on the
top of the control panel. The ignition sequence
will start again and the burner will start. The
appliance will return to its previous mode of
operation.