Honeywell 7800 Series Operating Instructions Manual page 7

4.2.1 table 5. static Checkout.
test Voltme-
test Jumpers
no.
1 –
2 –
3 3-10
4 3-8
5 3-9
6 3-4
FINAL
After completing these tests, open the master switch, remove all test jumpers from the subbase terminals, and remove any
4.2.2 Fig. 1. Internal block diagram of the RM/eC7890
3
CONFIGURATION
1
JUMPERS
MICROCOMPUTER
RESET
PUSH-
BUTTON
SAFETY RELAY
CIRCUIT
STATUS LEDs
LIMITS CONTROLLER
6
3K1
OPTIONAL KEYBOARD
DISPLAY MODULE
RS485
DDL
1
2
DDL
REMOTE
3
COMMUNICATIONS
RESET
normal operation
ter
3-L2 Line Voltage
6-L2 Line Voltage
Ignition spark (if ignition transformer is
—
connected to terminal 10).
1. Ignition spark (if ignition transformer is
connected to terminal 8).
2. Automatic pilot valve opens (if connec-
— ted to terminal 8 or main valve if DSI
application).
NOTE: Refer to wiring diagram of system
being tested.
Automatic fuel valve(s) opens. (If using
– direct spark ignition, check the second
stage fuel valve(s).)
– Alarm (if used) turns on.
equipment Damage Hazard.
Can cause serious equipment damage.
bypass jumpers from the low fuel pressure limits to prevent equipment damage.
L1
L2
(HOT)
2
FLAME SIGNAL
PLUG-IN
FLAME
TEST
AMPLIFIER
RELAY
2K
DRIVE
RELAY
3K
CIRCUIT
STATUS
4K FEEDBACK
AND LINE
VOLTAGE
1K INPUTS
CONTROL
POWER SUPPLY
POWER
1K1 2K2 5K1
4K1
2K1
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACKAND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
If operation is Abnormal, Check the Items
Listed Below
1. Master switch.
2. Power connected to the master switch.
3. Overload protection (fuse, circuit breaker, etc.) has
not opened the power line.
1. Limits.
2. Burner control.
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean
b. Ignition transformer is okay.
1. Watch for spark or listen for buzz:
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
2. Listen for click or feel head of valve for activation:
a. Actuator, if used.
b. Pilot valve.
Same as test number 4. If using direct spark ignition,
check the first stage fuel valve(s) instead of the pilot
valve.
1. Alarm.
CAUtIon!
L2
RM7890C
TEST
JACK
F
F
N. O.
G
22
3
1 NUMBERS IN CIRCLES ARE RELAY MODULE
TERMINAL NUMBERS.
2 PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
120 VAC, 50/60 HZ (RM7890); 220-240 VAC,
IGNITION
10
50/60 HZ (EC7890) POWER SUPPLY.
8
PILOT
3
EC7890 REQUIRES A 220/240 VAC TO 120 VAC,
10VA, STEPDOWN TRANSFORMER (NOT
9 MAIN VALVE
SUPPLIED) WHEN USING C7012E, F; C7061A,
AND C7076A FLAME DETECTORS. NOT APPLICABLE
4
ALARM
FOR C7061A1020, C7061A1079, C7061F1003 and
C7061F1011-N.
EN-7
M11586A