Honeywell 7800 Series Installation Instructions Manual page 7

Test
No. Test Jumpers
1 —
2 —
3 3-10
4 3-8
5 3-9
6 3-4
FINAL
CAUTION
Equipment Damage Hazard.
Can cause serious equipment damage.
After completing these tests, open the master switch, remove all test jumpers from the subbase terminals,
and remove any bypass jumpers from the low fuel pressure limits to prevent equipment damage.
3
CONFIGURATION
1
JUMPERS
RESET
PUSH-
BUTTON
SAFETY RELAY
CIRCUIT
STATUS LEDs
LIMITS CONTROLLER
3K1
OPTIONAL KEYBOARD
DISPLAY MODULE
RS485
DDL
1
DDL 2
COMMUNICATIONS
Table 5. Static Checkout.
Voltmeter Normal Operation
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
connected 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.
L1
L2
(HOT)
2
FLAME SIGNAL
MICROCOMPUTER
TEST
RELAY
2K
DRIVE
CIRCUIT 3K
4K
1K
POWER SUPPLY
1K1 2K2
6
4K1
2K1
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
REMOTE
3
INTERNAL WIRING
RESET
Fig. 1. Internal block diagram of the RM/EC7890.
RM7890A,B/EC7890A,B 7800 SERIES RELAY MODULES
If Operation is Abnormal, Check the Items
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.
L2
TEST
JACK
F
PLUG-IN
G
FLAME
AMPLIFIER
22
3
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
1
INPUTS
CONTROL
2
POWER
5K1
IGNITION
10
8 PILOT
3
9 MAIN VALVE
4
ALARM
7
Listed Below
RM7890C
F
N. O.
NUMBERS IN CIRCLES ARE RELAY MODULE
TERMINAL NUMBERS.
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
120 VAC, 50/60 HZ (RM7890); 220-240 VAC,
50/60 HZ (EC7890) POWER SUPPLY.
EC7890 REQUIRES A 220/240 VAC TO 120 VAC,
10VA, STEPDOWN TRANSFORMER (NOT
SUPPLIED) WHEN USING C7012E, F; C7061A,
AND C7076A FLAME DETECTORS. NOT APPLICABLE
FOR C7061A1020, C7061A1079, C7061F1003
M11586A
32-00157-03