Dettson AMT400B34-SM1PMA, Installation Instructions And Homeowner'S Manual

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8
WARNING
Poisonous carbon monoxide gas hazard.
Install the evaporator coil on the supply side of the
furnace ducting ONLY.
An evaporator coil installed on the return air side of the
ducting can cause condensation to form inside the heat
exchanger, resulting in heat exchanger failure. This in
turn, can result in death, bodily injury and/or property
damage.
A clearance of 15 cm (6") is required between the bottom of
the coil drain pan and the top of the heat exchanger. If a heat
pump is installed, a “dual-energy” thermostat, or other control
is recommended, in order to prevent the simultaneous
operation of the furnace and the heat pump. It also prevents a
direct transition from heating by way of the heat pump to
heating with oil. Refer to the thermostat instructions or those of
another control used for the proper wiring.
If a coil blower compartment is used, install air tight, motorized
and automatic air dampers. Cold air coming from the coil and
passing across the furnace can cause condensation and
shorten the life of the heat exchanger.
3 OPERATION
3.1 START-UP
Before starting up the unit, be sure to check that the following
items are in compliance:
1.
The electrical installation, the oil supply system, the
venting system, combustion air supply and ventilation;
2.
The blower access door is in place and the blower rail
locking screws are well tightened;
3.
The Blocked Vent Shut-Off (BVSO) is installed according
to instructions (for chimney venting);
4.
The oil supply valve is open;
5.
The burner ‘’Reset’’ button is well pushed in or re-armed;
6.
The preliminary air adjustments on the burner comply with
the technical specifications in this manual;
7.
The blower speed adjustments for heating and air
conditioning are appropriate and according to the
specifications in this manual;
8.
The blower start/stop delays are satisfactory;
9.
The thermostat of the room is in the heating mode and is
set higher than the ambient temperature.
To start the unit, turn the main electrical switch on.
3.2 SEQUENCE OF OPERATION
BECKETT AFG / RIELLO 40-F
1. Normally open contact (T-T) on primary relay
closed when thermostat calls for heat;
2. Beckett burner: The motor starts and spark is
established. The pump pressure builds and the
oil supply mechanism opens, admitting fuel to the
nozzle;
Riello burner: Burner motor starts. The burner
motor fan pre-purges the combustion chamber
and vent for 10 seconds, establishing the
combustion air pattern. During this time the
solenoid valve holding coil pressure is
approximately 100 psig. The solenoid valve
opens, allowing oil to flow through the nozzle. At
the same time, the burner motor ignition coil
produces a spark;
3. Spark ignites oil droplets;
4. Cad cell senses flame and burner continues to
fire. Ignition transformer ceases sparking (Riello
R40-F);
5. After fan-limit control heats up to the factory set
point, the circulating air blower and electronic air
cleaner starts;
6. The circulating air blower and burner motor
remain on until the thermostat is satisfied (AFG).
The ignition transformer continues to spark
(AFG). The solenoid valve remains open (R40-F);
Thermostat is satisfied :
7. Primary relay contacts open, solenoid valve
closes (R40-F), burner fan motor shuts down. The
ignition transformer ceases sparking (AFG);
8. The fan-limit control bi-metal cools down to the
factory set point of 90
o
F (32
o
C). At that point the
circulating air blower stops.
3.3 CHECKS AND ADJUSTMENTS
3.3.1
P
URGING THE OIL LINE
Open the bleed port screw and start the burner. Allow the
oil to drain into a container for at least 10 seconds. The oil
should flow absolutely free of white streaks or air bubbles
to indicate that no air is being drawn into the suction side
of the oil piping and pump. Slowly close and tighten the
bleed screw. Once closed, the flame will light up.
3.3.2
P
RESSURE ADJUSTMENT
The oil pressure must be adjusted according to the
Technical Specifications of this manual. An adjustment
screw and a connection for a pressure gauge are located
on the oil pump for that purpose. Also refer to the burner
instruction manual.