Daikin DRG0361DL00001S, Инструкция по эксплуатации

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SERVICING
Measuring Inlet And Manifold Gas Pressure
NOTE! SUPPLY PRESSURE
IS TO BE BETWEEN 5.0 & 7.0 INCHES NATURAL
AND 11.0 & 14.0 INCHES L.P. WITH THE FURNACE
OPERATING.
INLET (SUPPLY) PRESSURE MANOMETER
(FIELD SUPPLIED)
OUTLET (MANIFOLD)
PRESSURE MANOMETER
(FIELD SUPPLIED)
MANIFOLD PRESSURE
IS TO BE BETWEEN
3.2 & 3.7 NATURAL AND
10.0 & 11.0 INCHES L.P.
HIGH FIRE OR
SINGLE STAGE AND
BETWEEN
1.7 AND 2.3 INCHES
NATURAL
7.0 & 8.0 INCHES
LOW STAGE
NOTE!
Two-Stage H Valve
Measuring Inlet And Manifold Gas Pressure
With Power ON:
WARNING
Line Voltage now present.
3. Put unit into heating cycle and turn on all other gas
consuming appliances.
SINGLE STAGE MODELS
For NATURAL GAS:
A. Inlet pressure should be a nominal 7” w.c.
B. Manifold pressure for 2 stage heat models on low
stage should be 2.0” w.c. ± .3”w.c.
C. Manifold pressure for single stage heat models and
2 stage heat models on high stage should be 3.5”
± .3”w.c.
For PROPANE GAS:
A. Inlet pressure should be a nominal 11” w.c.
B. Manifold pressure for 2 stage heating models on
low stage should be 6” w.c.
C. Manifold pressure for single stage heat models and
2 stage heat models on high stage should be 10”
w.c.
Range Nominal
Low Stage 1.6 - 2.2" w.c. 2.0" w.c.
High Stage 3.2 - 3.8" w.c. 3.5" w.c.
Low Stage 5.7 - 6.3" w.c. 6.0" w.c.
High Stage 9.7 - 10.3" w.c. 10.0" w.c.
Range Nominal
Natural
Single Stage
3.2 - 3.8" w.c. 3.5" w.c.
Propane Single Stage 9.7 - 10.3" w.c. 10.0" w.c.
MANIFOLD GAS PRESSURE
Gas
Natural
Propane
Gas
2 Stage Heat Models
Single Stage Heat Models
If operating pressures differ from chart, make necessary
pressure regulator adjustments, check piping size, etc.,
and/or consult with local utility.
S-308 Checking For Delayed Ignition
Delayed ignition is a delay in lighting a combustible mixture
of gas and air which has accumulated in the combustion
chamber.
When the mixture does ignite, it may explode and/or
rollout causing burning in the burner venturi.
If delayed ignition should occur, the following should be
checked:
1. Improper gas pressure - adjust to proper pressure.
(See S-307)
2. Improper burner positioning - burners should be in
locating slots, level front to rear and left to right.
3. Carry over (lighter tube or cross lighter) obstructed -
clean.
4. Main burner orifice(s) deformed, or out of alignment
to burner - replace.
S-309 Checking For Flashback
Flashback will also cause burning in the burner venturi, but
is caused by the burning speed being greater than the gas-
air flow velocity coming from a burner port.
Flashback may occur at the moment of ignition, after a
burner heats up or when the burner turns off. The latter is
known as extinction pop.
Since the end results of flashback and delayed ignition
can be the same (burning in the burner venturi) a definite
attempt should be made to determine which has occurred.
If flashback should occur, check for the following:
1. Improper gas pressure - adjust to proper pressure.
See S-307.
2. Check burner for proper alignment and/or replace
burner.
3. Improper orifice size - check orifice for obstruction.
S-310 Checking Pressure Control
A pressure control device is used to measure negative
pressure at the induced draft blower motor inlet to detect
a partial or blocked flue.