Daikin DM96SE, Руководство по установке

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30
O
PERATIONAL
C
HECKS
The burner flames should be inspected with the burner com-
partment door installed. Flames should be stable, quiet, soft,
and blue (dust may cause orange tips but they must not be
yellow). Flames should extend directly outward from the burn-
ers without curling, floating, or lifting off. Flames must not
impinge on the sides of the heat exchanger firing tubes.
S
AFETY
C
IRCUIT
D
ESCRIPTION
A number of safety circuits are employed to ensure safe and
proper furnace operation. These circuits serve to control any
potential safety hazards and serve as inputs in the monitoring
and diagnosis of abnormal function. These circuits are con-
tinuously monitored during furnace operation by the integrated
control module.
I
NTEGRATED
C
ONTROL
M
ODULE
The integrated control module is an electronic device which,
if a potential safety concern is detected, will take the neces-
sary precautions and provide diagnostic information through
an LED.
P
RIMARY
L
IMIT
The primary limit control is located on the partition panel and
monitors heat exchanger compartment temperatures. It is a
normally-closed (electrically), automatic reset, temperature-
activated sensor. The limit guards against overheating as a
result of insufficient conditioned air passing over the heat
exchanger.
A
UXILIARY
L
IMIT
The auxiliary limit controls are located on or near the circula-
tor blower and monitors blower compartment temperatures.
They are a normally-closed (electrically), manual-reset sen-
sors. These limits guard against overheating as a result of
insufficient conditioned air passing over the heat exchanger.
B
URNER
T
EMPERATURE
S
WITCH
The Burner Temperature Switch is mounted on the burner
assembly and monitor the burner box temperature. It is
normally-closed (electrically), auto-reset sensor. This limit
guards against burner flames not being properly drawn into
the heat exchanger.
P
RESSURE
S
WITCHES
The pressure switches are normally-open (closed during op-
eration) negative air pressure-activated switches. They moni-
tor the airflow (combustion air and flue products) through the
heat exchanger via pressure taps located on the induced draft
blower and the coil front cover. These switches guard against
insufficient airflow (combustion air and flue products) through
the heat exchanger and/or blocked condensate drain condi-
tions.
F
LAME
S
ENSOR
The flame sensor is a probe mounted to the burner/manifold
assembly which uses the principle of flame rectification to
determine the presence or absence of flame.
P
RESSURE
S
ENSOR
Pressure sensor is mounted on the induced draft blower.
Its function is to regulate the induced draft blower’s speed
in order to maintain proper air-fuel ratio for clean and
reliable combustion.
T
ROUBLESHOOTING
E
LECTROSTATIC
D
ISCHARGE
(ESD) P
RECAUTIONS
NOTE: Discharge body’s static electricity before touching unit.
An electrostatic discharge can adversely affect electrical
components.
Use the following precautions during furnace installation and ser-
vicing to protect the integrated control module from damage. By
putting the furnace, the control, and the person at the same
electrostatic potential, these steps will help avoid exposing the
integrated control module to electrostatic discharge. This pro-
cedure is applicable to both installed and uninstalled (ungrounded)
furnaces.
1. Disconnect all power to the furnace. Do not touch the
integrated control module or any wire connected to the
control prior to discharging your body’s electrostatic
charge to ground.
2. Firmly touch a clean, unpainted, metal surface of the
furnace away from the control. Any tools held in a person’s
hand during grounding will be discharged.
3. Service integrated control module or connecting wiring
following the discharge process in step 2. Use caution not
to recharge your body with static electricity; (i.e., do not
move or shuffle your feet, do not touch ungrounded
objects, etc.). If you come in contact with an ungrounded
object, repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new
control from its container. Follow steps 1 through 3 if
installing the control on a furnace. Return any old or new
controls to their containers before touching any ungrounded
object.
HIGH VOLTAGE !
T
O AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK
,
DISCONNECT ELECTRICAL POWER
BEFORE
PERFORMING ANY SERVICE OR MAINTENANCE
.
WARNING
F
AULT
C
ODE
R
ETRIEVAL
Function: When the SW1 button is pressed momentarily,
the control displays the last five (5) fault codes recorded
in non-volatile memory upon demand.
Operation: The control must be powered and the ther-
mostat satisfied (no call for heat or cool). Depress and
release the SW1 button once (less than 5 seconds); the