Guspro BB-8416884 - OPERATION; 2. STANDBY PERIOD; 3. PREPURGE PERIOD; 4. PILOT FLAME ESTABLISHING PERIOD (PFEP)

RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES
66-1090—310
Fig. 4. RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D Relay Module, exploded view.
2.
STANDBY PERIOD
a. Airflow lockout feature is enabled and the airflow
switch does not close after ten seconds or within the
specified pur
g
e card timin
g
.
b. Flame si
g
nal is detected after 30 seconds.
c. I
g
nition/pilot valve/intermittent pilot valve terminal is
ener
g
ized.
d. Main valve terminal is ener
g
ized.
e. Dela
y
ed main valve terminal is ener
g
ized
(
RM7895C,D
)
.
f. Internal s
y
stem fault occurred.
g
.Pur
g
e card is removed.
h. Pur
g
e card is bad.
3.
PREPURGE PERIOD
a. Airflow lockout feature is enabled and the airflow
switch opens.
b. I
g
nition/pilot valve terminal is ener
g
ized.
c. Main valve terminal is ener
g
ized.
d. Dela
y
ed main valve terminal is ener
g
ized
(
RM7895C,D
)
.
e. Internal s
y
stem fault occurred.
f. Pur
g
e card is removed.
g
.Pur
g
e card is bad.
h. Flame si
g
nal is detected.
4.
PILOT FLAME ESTABLISHING PERIOD
(
PFEP
)
a. Airflow lockout feature is enabled and the airflow
switch opens.
b. No flame si
g
nal at end of PFEP.
c. I
g
nition/pilot valve/intermittent pilot valve terminal is
not ener
g
ized.
NOTE: For the RM7895C1020 and RM7896C1036, durin
g
the first 8 seconds of PFEP, when a flame si
g
nal is
detected, terminal 10 is de-ener
g
ized. If the flame
si
g
nal is lost, terminal 10 will re-ener
g
ize.
d. Main valve terminal is ener
g
ized.
e. Dela
y
ed
(
second sta
g
e
)
main valve terminal is
ener
g
ized
(
RM7895C,D/EC7895C; RM7896C,D
)
.
f. Internal s
y
stem fault occurred.
g
.Pur
g
e card is removed.
h. Pur
g
e card is bad.
HONEYW
ELL
POWER
PILOT
FLAME
MAIN
ALARM
RESET
DUST
COVER
PURGE
TIMER
WIRING
SUBBASE
CAPTIVE
MOUNTING
SCREW
RUN/TEST (C,D ONLY)
SWITCH
CONFIGURATION
JUMPERS
RELAY
MODULE
SEQUENCE
STATUS
LED PANEL
RESET
BUTTON
FLAME
AMPLIFIER
BURNER CONTROL
M15122