Honeywell RM7890B2014 Installation Instructions

RM7890A,B/EC7890A,B 7800 SERIES RELAY MODULES
7 32-00157-03
Fig. 1. Internal block diagram of the RM/EC7890.
Table 5. Static Checkout.
Test
No. Test Jumpers Voltmeter Normal Operation
If Operation is Abnormal, Check the Items
Listed Below
1 — 3-L2 Line Voltage. 1. Master switch.
2. Power connected to the master switch.
3. Overload protection (fuse, circuit breaker,
etc.) has not opened the power line.
2 — 6-L2 Line Voltage. 1. Limits.
2. Burner control.
3 3-10 — Ignition spark (if ignition
transformer is connected to
terminal 10).
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean
b. Ignition transformer is okay.
4 3-8 — 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.
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.
5 3-9 — Automatic fuel valve(s) opens. (If
using direct spark ignition, check
the second stage fuel valve(s).)
Same as test number 4. If using direct spark
ignition, check the first stage fuel valve(s)
instead of the pilot valve.
6 3-4 — Alarm (if used) turns on. 1. Alarm.
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.
CONFIGURATION
JUMPERS
MICROCOMPUTER
RESET
PUSH-
BUTTON
STATUS LEDs
SAFETY RELAY
CIRCUIT
POWER SUPPLY
OPTIONAL KEYBOARD
DISPLAY MODULE
PLUG-IN
FLAME
AMPLIFIER
RELAY
DRIVE
CIRCUIT
CONTROL
POWER
TEST
JACK
REMOTE
RESET
DDL
DDL
COMMUNICATIONS
IGNITION
PILOT
MAIN VALVE
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
1K
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
LIMITS CONTROLLER
1K1
2K2
FLAME SIGNAL
TEST
RS485
1
2
3
L1
(HOT)
L2
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
3
6
5K1
4K1
2K1
10
8
9
4K
3K
2K
F
G
22
ALARM
3K1
4
L2
M11586A
F
RM7890C
1
2
2
1
3
3

Honeywell RM7890B2014 Specifications

General

Brand	Honeywell
Model	RM7890B2014
Category	Relays
Language	English