ECR International HML-C Installation, Operation And Maintenance Manual - page 9
After three or four minutes of burner operation, the limit
control should turn the burner off. When the limit function
test is complete, shut off electrical power to the furnace,
replace the neutral wire to the blower fan motor, and then
restore power. The blower fan will start up immediately.
Once the temperature has dropped and the limit control
has reset, the fan will operate until the fan off time is
achieved. The oil burner will then resume operation and
continue until the thermostat is satisfied. Restore the
thermostat setting to a comfortable temperature.
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To Shut Down Unit
Set the thermostat to the lowest possible setting.
Set the manual switch (if installed) in the Electrical Power
Supply Line to "OFF".
21. OPERATING INSTRUCTIONS (HMLV-C)
Before Lighting
Open all supply and return air registers and grilles.
Open all valves in oil pipes.
Turn on electric power supply
To Light Unit
Set the thermostat above room temperature to call for
heat. The burner should start. NOTE: It may be
necessary to press the RESET button on the primary
combustion control relay.
There will be a fan on time delay before the circulating
fan is energized. The United Technologies 1168-1 has
an adjustable fan on/off time delay that is programmed
into the ECM motor, and is set by selecting the SW4 DIP
switch combination displayed in Table A-10 page 15.
Fan on/off delay must be adjusted according to input
(nozzle size).
1. Set the thermostat below room temperature. The oil
burner should stop.
The air circulation blower will continue to run until the
blower off delay setting programmed into the ECM motor
times out.
To check the operation of the limit switch, shut off power
to the furnace. Temporarily remove the 5 pin power
connector plug from the ECM blower motor. NOTE:
Isolate the AC Line pins on the 5 pin power
connector with electrical tape to prevent electric
shock hazard.
Restore the electrical power to the
furnace and set the thermostat above room temperature.
After three or four minutes of burner operation, the limit
control should turn the burner off. When the limit function
test is complete, shut off electricalpower to the furnace,
replace the 5 pin power plug to the blower fan motor, and
then restore power. The blower fan will start up
immediately. Once the temperature has dropped and the
limit control has reset, the fan will operate until the fan off
time is achieved. The oil burner will then resume
operation and continue until the thermostat is
satisfied. Restore the thermostat setting to a
comfortable temperature.
NOTE: IF THE FURNACE IS TO BE SHUT
DOWN FOR AN EXTENDED PERIOD OF
TIME, CLOSE THE OIL SUPPLY VALVE TO
THE BURNER.
DO NOT ATTEMPT TO START THE BURNER
WHEN EXCESS OIL HAS ACCUMULATED,
WHEN THE FURNACE IS FULL OF VAPOUR,
OR WHEN THE COMBUSTION CHAMBER IS
VERY HOT. NEVER BURN GARBAGE OR
PAPER IN THE FURNACE, AND NEVER
LEAVE PAPER OR RAGS AROUND THE
UNIT.
22. ECM BLOWER MOTOR OPERATION
(HMLV-C)
Setting Blower “ON” and “OFF” Timings
Blower on/off time delays are handled by ECM
motor programming. Features of this ECM variable
speed motor are that it will deliver a constant airflow
within a wide range of external static pressures, and
also includes:
Soft Start:
This ECM variable speed motor will
slowly ramp up to the required operating speed.
This feature in the heating cycle allows the heat
exchanger to reach operating temperature before
the set heat speed, which minimizes noise and
increases comfort.
Soft Stop:
At the end of the heating cycle, the ECM
variable speed motor will slowly ramp down. This
feature allows for increased energy efficiency and
reduced noise levels.
Dehumidification:
A dehumidification feature has
been programmed into the variable speed motor. At
the start of each cooling cycle, the variable speed
motor will run at 82% of the rated airflow for 7.5
minutes. After 7.5 minutes has elapsed, the motor
will increase to 100% of the rated airflow. This
profile is used to provide dehumidification and
improve system efficiency.
Continuous Fan Operation
: When the thermostat
continuous fan (G) switch is on without a call for
heating or cooling, the indoor fan is immediately
energized up to 50% of the cooling speed. This
feature allows continuous circulation of air between
calls for heating or cooling.
If a call for heat (W) or cool (Y) occurs during
continuous fan, the blower will remain energized