AERCO Esteem O&M Manual - Manual (Page 51)

45
Operation Verifi cation - Domestic Hot Water
• If the burner flame proves, the burner
will continue to fire at the ignition fan
speed for approximately 10 seconds to
stabilize the flame.
• If the burner flame is not proven the
control module will repeat the ignition
sequence. If the flame is not proven
after five attempts the control will lock-
out and the display will show [
E-02 ]
• To verify flame failure lockout, close
the manual shut off valve on the gas
supply piping to the boiler and repeat
ignition sequence. When verification is
completed, ensure the manual shut off
valve is returned to the open position.
• [
3140
] This is the normal space heat-
ing operation cycle. After the flame is
proven and stabilized the burner will
fire at low input for approximately 1
minute. After this time period, the con-
trol module will begin to modulate the
burner firing rate based on actual boiler
outlet temperature and the set point
temperature.
6. Allow the boiler to operate and allow the
boiler outlet temperature to reach the set
point temperature.
• [ 6180 ] This begins the burner shut-
down and post purge cycle. The space
heating circulator will continue to run
until the room thermostat is satisfied.
7. Lower the room thermostat set point
below the room temperature to end the
call for heat.
• [ 1180 ] This begins a post purge cycle.
When the room thermostat is satisfied,
the boiler will shutdown. The control
module will close the gas valve and
the blower will continue for 30 seconds
for a post purge cycle before shutting
down. If another call for heat is initi-
ated, the boiler will remain off for an
additional 30 seconds before starting a
new ignition sequence.
• [ 7180 ] The space heating circulator
will continue to run for a 1 minute post
pump cycle.
• [ 0180 ]The boiler is in standby MODE
waiting for a call for heat.
8. Verify the operation of the boiler by
repeating the operational sequence sev-
eral times.
9. Return the room thermostat to a desired
setting. Reconnect the DHW wiring or
return the DHW aquastat to desired set-
ting, placing the DHW system into opera-
tion.
GF-125