Olsen HTL-90D - Operating Instructions (HTLV-D); ECM Blower Motor Operation (HTLV-D)

10
OPERATING INSTRUCTIONS HTLVD
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. e
burner should start. NOTE: It may be necessary to press the RESET
button on the primary combustion control relay.
ere will be a fan on time delay before the circulating fan is ener-
gized. e United Technologies 1168-1 has an adjustable fan on/
o time delay that is programmed into the ECM motor, and is set by
selecting the SW4 DIP switch combination displayed in
Tables 8 A
and B
pages 16 and 17 . Fan on/o delay must be adjusted according
to input (nozzle size).
Set the thermostat below room temperature. e oil burner
1.
should stop.
e air circulation blower will continue to run until the blower
2.
o delay setting programmed into the ECM motor times out.
To check the operation of the limit switch, shut o power to the
3.
furnace. Temporarily remove the 5 pin power connector plug
from the ECM blower motor.
NOTICE
Isolate the AC Line pins on the 5 pin power connec-
tor with electrical tape to prevent electric shock hazard.
Restore the electrical power to the furnace and set the
thermostat above room temperature.
Aer three or four minutes of burner operation, the limit
4.
control should turn the burner o. When the limit function
test is complete, shut o electrical power to the furnace, replace
the 5 pin power plug to the blower fan motor, and then restore
power. e blower fan will start up immediately. Once the
temperature has dropped and the limit control has reset, the
fan will operate until the fan o time is achieved. e oil burner
will then resume operation and continue until the thermostat
is satised. Restore the thermostat setting to a comfortable
temperature.
NOTICE
IF THE FURNACE IS TO BE SHUT DOWN FOR AN
EXTENDED PERIOD OF TIME, CLOSE THE OIL SUP-
PLY VALVE TO THE BURNER.
!
CAUTION
DO NOT ATTEMPT TO START THE BURNER WHEN
EXCESS OIL HAS ACCUMULATED, WHEN THE
FURNACE IS FULL OF VAPOR, OR WHEN THE COM-
BUSTION CHAMBER IS VERY HOT. NEVER BURN
GARBAGE OR PAPER IN THE FURNACE, AND NEVER
LEAVE PAPER OR RAGS AROUND THE UNIT.
ECM BLOWER MOTOR OPERATION HTLVD
Setting Blower “ON” and “OFF” Timings
Blower on/o time delays are handled by ECM motor programming.
Features of this ECM variable speed motor are that it will deliver a
constant airow within a wide range of external static pressures, and
also includes:
Soft Start : is ECM variable speed motor will slowly ramp up to
the required operating speed. is feature in the heating cycle allows
the heat exchanger to reach operating temperature before the blower
motor starts, which minimizes noise and increases comfort.
Soft Stop : At the end of the heating cycle, the ECM variable speed
motor will slowly ramp down. is feature allows for increased
energy eciency and reduced noise levels.
Dehumidication : A dehumidication feature has been pro-
grammed into the variable speed motor. At the start of each cooling
cycle, the variable speed motor will run at 82% of the rated airow
for 7.5 minutes. Aer 7.5 minutes has elapsed, the motor will
increase to 100% of the rated airow. is prole is used to provide
dehumidication and improve system eciency.
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. is
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.