ECR International HML-C, Инструкция по установке, эксплуатации и обслуживанию

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NOTE: Beckett AF Series Burner electrode specifications
have been revised. They should be adjusted to be 5/16”
above the nozzle centerline.
17. BURNER PRIMARY (SAFETY) CONTROL
The furnace is equipped with a primary combustion
control, sometimes referred to as the burner relay or
burner protector relay, which uses a light sensing device
(cad cell) located in the burner housing, to monitor and
control combustion. Over time, dust or combustion
residuals can build up on the lens of the cad cell
impairing its response to the flame. The cad cell should
be checked for cleanliness and proper alignment if the
primary control frequently shuts down combustion.
ALL FURNACE CONTROLS ARE SENSITIVE
AND SHOULD NOT BE SUBJECTED TO
TAMPERING. IF PROBLEMS PERSIST, CALL
YOUR SERVICE CONTRACTOR.
18. COMBUSTION CHAMBER
This furnace is equipped with a high quality cerafelt
combustion chamber. It is held in place by a retaining
bracket.
CHECK THE ALIGNMENT OF THE COMBUSTION
CHAMBER AND OIL BURNER BEFORE FIRING.
IT IS POSSIBLE FOR THE COMBUSTION
CHAMBER TO SHIFT IF SUBJECTED TO ROUGH
HANDLING DURING TRANSIT
.
The combustion
chamber should be inspected for damage or carbon build
up whenever the oil burner is removed for repairs or
routine maintenance.
DO NOT START THE BURNER UNLESS THE
BLOWER ACCESS DOOR IS SECURED IN
PLACE.
19a. CIRCULATING AIR BLOWER (HML-C)
The HML-C and HMLV-C furnace models are equipped
with direct drive blower systems. HML-C models are
equipped with PSC motors; HMLV-C models are
equipped with electronically commutated motors (ECM).
Direct drive blower speed adjustments are not normally
required in properly sized extended plenum duct
systems. The motor RPM and air CFM delivery will vary
automatically to accommodate conditions within the
usual range of external static pressures typical of
residential duct systems. Under-sized duct systems may
require a higher blower speed to obtain a reasonable
system temperature rise. Some older duct systems were
not designed to provide static pressure. They typically
feature special reducing fittings at each branch run and
lack block ends on the trunk ducts. These systems
may require modification to provide some resistance
to the airflow to prevent over-amping of the direct
drive blower motor. Selecting a lower blower speed
may correct this problem. Direct drive blower speeds
are adjusted by changing the "hot" wires to the
motor winding connections. Please refer to wiring
diagrams in Appendix B or the wiring diagram label
affixed to the furnace.
THE NEUTRAL WIRE
(normally the white wire) IS NEVER MOVED TO
ADJUST THE BLOWER SPEED
.
It is possible and acceptable to use a single blower
speed for both heating and cooling modes. The
simplest method to connect the wiring from both
modes is to use a "piggy-back connector"
accommodating both wires on a single motor tap. It
is also acceptable to connect the selected motor
speed with a pigtail joined to both heating and
cooling speed wires with a wire nut. As a safety
precaution against accidental disconnection of the
wires by vibration, it is advisable to secure the wire
nut and wires with a few wraps of electricians tape.
DO NOT CONNECT POWER LEADS
BETWEEN MOTOR SPEEDS. THE NEUTRAL
WIRE MUST ALWAYS BE CONNECTED TO
THE MOTOR'S DESIGNATED NEUTRAL
TERMINAL.
If the joining of the blower speed wiring is done in
the furnace junction box, tape off both ends of the
unused wire.
Do not use the blower speed wires as a source
of power to accessories as electronic air
cleaners and humidifier transformers.
The
unused motor taps auto-generate sufficiently high
voltages to damage accessory equipment.
DISCONNECT THE POWER SUPPLY TO THE
FURNACE BEFORE OPENING THE BLOWER
ACCESS DOOR TO SERVICE THE AIR
FILTER, FAN AND MOTOR. FAILURE TO
SHUT OFF POWER COULD ALLOW THE
BLOWER TO START UNEXPECTEDLY,
CREATING A RISK OF DEATH OR
PERSONAL INJURY.
19b. CIRCULATING AIR BLOWER (HMLV-C)
(See Section 22 Page 9)
30173 Rev B 4/29/2008
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