Dettson AMT Serie Guide D'installation Et Manuel Du Propriétaire page 8

Figure 6:Blower start / stop delays - Board #1158
2.11 SUPPLY AIR ADJUSTMENT (ECM
VARIABLE SPEED MOTORS)
On units equipped with ECM variable speed blower motors,
the air supply must be adjusted based on heating/air
conditioning output. The start/stop delays of the blower must
also be adjusted by positioning the DIP switches on the
electronic board. Refer to the following tables and the wiring
diagram in this manual for the proper settings:
Table 3:Heating Mode
SW1 – HEAT
DIP Switch Positions
1 2
OFF OFF
ON OFF
OFF ON
ON ON
Table 4: Air Conditioning Mode
SW2 – COOL
DIP Switch Positions
1 2
OFF OFF
ON OFF
OFF ON
ON ON
Table 5:CFM adjustment - All Modes
SW3 – ADJ (Adjustment)
DIP Switch Positions
1 2 POSITION
OFF OFF A
ON OFF B
OFF ON C
ON ON D
Table 6:Delay adjustments - Heating Mode
SW4 – Delay
DIP Switch Positions
1 2
OFF OFF
ON OFF
OFF ON
ON ON
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Input
USGPH
POSITION
A 0.70
B 0.55
C* 0.55
D ALL
Output
Tons
POSITION
A 3.0
B 2.5
C 2.0
D 1.5
CFM HTG. CFM A/C
% increase % increase
or decrease or decrease
0% 0%
+10% +10%
-10% -10%
N/A 0%
Input
USGPH
POSITION
A 0.70
B 0.55
C* 0.55
D ALL
2.12 INSTALLATION OF ACCESSORIES
WARNING
Electrical shock hazard.
Turn OFF electrical power at the fuse box or service
panel before making any electrical connections and
ensure a proper ground connection is made before
connecting line voltage.
Failure to do so can result in death or bodily injury.
H (HUM)
2.12.1
UMIDIFIER
The 120 VAC HUM terminal on the electronic board of the
blower is tied directly to terminal 8 of the 9-terminal
connector of the electronic board. It supplies 120 VAC
electric power when the burner is in operation.
A 24 VAC signal can also be supplied from the W and C
terminals on the blower electronic board to activate a
switching relay.
Also refer to the instructions supplied with the accessory.
E
2.12.2
LECTRONIC AIR
The EAC terminal on the electronic board supplies 120
VAC when the blower is operating in the heating or air
conditioning mode. This signal can be used to activate an
electronic air cleaner that is not equipped with an air flow
switch. If the cleaner is equipped with an air flow switch,
the S terminal on the electronic board can be used to
provide a constant supply of 120 VAC.
Also refer to the instructions supplied with the accessory.
A C
2.12.3
IR ONDITIONER
An air conditioning coil has to be installed on the supply
air side ONLY.
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.
8
C (EAC)
LEANER
( H P )
OR EAT UMP