Справочник Пользователя для Honeywell DVD Recorder L

23

66-1153—03

1. INITIATE Period:

a. Purge card is not installed or is removed.

b. Purge card is bad.

c. Configuration jumpers are changed (after 200 hours 

of operation).

d. AC line power errors occur; see Operation section.

e. Four minute INITIATE period has been exceeded.

2. STANDBY Period:

a. Flame signal is present after 240 seconds.

b. Pre-Ignition Interlock is open an accumulative time 

of 30 seconds.

c. Interlock check feature is enabled and the 

Interlock String (including airflow switch) is closed 

for 120 seconds with controller closed.

d. Ignition/pilot valve/intermittent pilot valve terminal is 

energized.

e. Main valve terminal is energized.

f. Internal system fault occurs.

g. Purge card is not installed or is removed.

h. Purge card is bad.

3. PREPURGE Period:

a. Pre-Ignition Interlock opens anytime during PRE-

PURGE period (R7140L).

b. Flame signal is detected after first ten seconds 

during PREPURGE (R7140L).

c. High Fire Switch fails to close within 4 minutes and 

15 seconds after the firing rate motor is commanded 

to drive to the high fire position at the start of PRE-

PURGE (R7140L).

d. Low Fire Switch fails to close within 4 minutes and 

15 seconds after the firing rate motor is commanded 

to drive to the low fire position at the end of PRE-

PURGE.

e. Running Interlock does not close within 30 seconds 

(R7140G,M).

f. Lockout Interlock does not close within 10 seconds 

(R7140L).

g. Lockout Interlock opens during PREPURGE (R7140L).

h. Ignition/pilot valve/intermittent pilot valve terminal is 

energized.

i.

Main valve terminal is energized.

j.

Internal system fault occurs.

k. Purge card is removed.

l.

Purge card is bad.

4. PILOT FLAME ESTABLISHING Period (PFEP):

a. Low Fire Switch opens.

b. Lockout Interlock opens (RM7140L).

c. Ignition/pilot valve/intermittent pilot valve terminal is 

not energized.

d. Early spark termination terminal is energized after 

five seconds.

e. No flame is present at the end of PFEP.

f. Main valve terminal is energized (R7140G,M).

g. Internal system fault occurs.

h. Purge card is removed.

i.

Purge card is bad.

5. MAIN FLAME ESTABLISHING Period (MFEP):

a. Low Fire Switch Opens.

b. Lockout Interlock opens (R7140L).

c. Ignition/pilot valve/intermittent pilot valve terminal is 

not energized.

d. Main valve terminal is not energized.

e. No flame is present at the end of MFEP.

f. Internal system fault occurs.

g. Purge card is removed.

h. Purge card is bad.

6. RUN Period:

a. No flame is present.

b. Lockout Interlock opens (R7140L).

c. Interrupted pilot valve terminal is energized 

(R7140G,M).

d. Main valve terminal is not energized.

e. Internal system fault occurs.

f. Purge card is removed.

g. Purge card is bad.

7. POSTPURGE Period:

a. Pre-Ignition Interlock does not close in five seconds 

and opens after five-second time period.

b. Ignition/pilot valve/intermittent pilot valve terminal is 

energized.

c. Main valve terminal is energized.

d. Internal system fault occurs.

e. Purge card is removed.

f. Purge card is bad.

The R7140 has the following operating sequences; see Fig. 4, 

9, and 14. The R7140 LED provides positive visual indication 

of the program sequence: POWER, PILOT, FLAME, MAIN 

and ALARM. (Note: The Power LED is lit for 4 1/2 seconds 

and off for 1/2 seconds, to indicate normal operation.)

The R7140 enters the INITIATE sequence when the Relay 

Module is powered. The R7140 can also enter the INITIATE 

sequence if the Relay Module verifies voltage fluctuations of 

+10/-15 percent or frequency fluctuations of ±10 percent 

during any part of the operating sequence. The INITIATE 

sequence lasts for ten seconds unless the voltage or 

frequency tolerances are not met. When the tolerances are 

not met, a hold condition is initiated for at least five seconds. 

When the tolerances are met, the INITIATE sequence 

restarts. If the condition is not corrected and the hold condition 

exists for four minutes, the R7140 locks out. Causes for hold 

conditions in the INITIATE sequence:

a. AC line dropout is detected.

b. AC line noise prevents a sufficient reading of the line 

voltage inputs.

c. Low line voltage brownouts occur.

The INITIATE sequence also delays the burner motor starter 

from being energized and de-energized from an intermittent 

AC line input or control input.

The R7140 is ready to start an operating sequence when the 

operating control determines a call for heat is present. The 

burner switch, limits, operating control and all microcomputer 

monitored circuits must be in the correct state for the R7140 to 

continue into the PREPURGE sequence.