Honeywell RA890G, Manual

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60-2035—9 4
RA890G
INSTALLATION
WIRING THE SUBBASE
IMPORTANT: When connecting wire to screw terminal of
terminal strip, wrap wire at least 3/4 of distance
around screw without overlapping. With appropri-
ately sized screwdriver, tighten screw until wire is
snugly in contact with underside of screw and contact
plate. Tighten screw additional one-half turn. Do not
use push-type ratchet screwdriver.
M8717
YES NO NO NO NO
1. All wiring must comply with applicable electrical
codes, ordinances, and regulations. Use NEC Class 1 wiring.
2. For normal installations, use moisture-resistant
No. 14 wire (rated for 167 ° F (75 ° C) or higher required by
Underwriters Laboratories Inc).
3. For high temperature installations, use moisture-re-
sistant No. 14 wire selected for a temperature rating above
the maximum operating temperature for all but the ignition
and flame detector F leadwires.
a. For the ignition, use Honeywell Specification no.
R1061012 Ignition Cable or equivalent. (This wire is
rated at 350
°
F (175
°
C) for continuous duty, and up to
500 ° F (260 ° C) for intermittent use. It was tested to
25,000 volts.)
b. For the flame detector F leadwire, use Honeywell
Specification no. R1298020 or equivalent. (This wire
is rated up to 400
° F (205 ° C) for continuous duty. It is
tested for operation up to 600 volts and breakdown up
to 7500 volts.)
4. For ignition installations in a contaminating environ-
ment, use Honeywell Specification no. R1239001 High
Tension Ignition Cable or equivalent. This wire is very
resistant to severe conditions of oil, heat, and corona, and is
tested to withstand high voltages up to 25,000V rms in a salt
bath for one minute without breakdown. It is rated at 200
° F
(93 ° C) for continuous duty, and up to 350 ° F (175 ° C) for
intermittent use.
IMPORTANT: Do not run high voltage ignition trans-
former wires in the same conduit with the flame
detector wiring.
5. Refer to Fig. 2 and 3 for typical field wiring connec-
tions. Follow the burner manufacturer’s wiring diagram if
provided.
Fig. 2—Gas system with interrupted ignition.
APPLICATIONS
Either a line or low voltage controller can be used. If a
line voltage controller is used, connect it between the limit
control and terminal 6, and jumper T-T.
Refer to the appropriate flame detector instructions when
paralleling two flame detectors.
IMPORTANT: The C7027, C7035 and C7044 Flame De-
tector leads are color coded blue and white. The blue
lead must be connected to the F terminal and the white
lead to the G terminal. The circuit is dc and the UV
tube is polarity sensitive. Reversing the leads, even
momentarily, can damage or destroy the UV tube.
All wiring must be NEC Class 1 and conform to local
electrical codes, ordinances, and regulations. If the leadwires
are not long enough to reach the flame safeguard control,
splices must be made in a junction box.
M8718
L1
(HOT) L2
1
2
3
4
3
3
2
4
4
1
FOR INTERMITTENT IGNITION, CONNECT TO TERMINAL 3.
ALARM TERMINALS OPTIONAL. IF LINE VOLTAGE ALARM IS USED.
RA890G MUST BE MOUNTED IN SUITABLE ENCLOSURE. ALARM
TERMINALS ARE ENERGIZED THROUGH THE RA890 SAFETY SWITCH.
ALARM IS NOT SOUNDED UNTIL THE SAFETY SWITCH TRIPS OUT.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
MAY USE LINE OR LOW VOLTAGE CONTROLLER. IF LINE VOLTAGE
CONTROLLER IS USED, CONNECT IT BETWEEN THE LIMIT CONTROL
AND TERMINAL 6. JUMPER T-T.
LINE VOLTAGE
CONTROLLER
MAIN GAS
VALVE
IGNITION
TRANSFORMER
PILOT
GAS VALVE
LOW VOLTAGE
CONTROLLER
BLUE
WHITE
6
T
T
F
G 2
2
1
3
4
5
DISCONNECT
SWITCH
LINE OR
LOW VOLTAGE
NO ALARM
NC NO COM
USE TERMINALS
NC AND C FOR
NORMALLY
CLOSED ALARM
INDICATOR OR
INTERBLOCK
CIRCUIT IF
DESIRED.
LINE OR LOW VOLTAGE
ALARM POWER SUPPLY
POWER
SUPPLY
RA890G
MANUAL OR AUTO RESET
LOCKOUT LIMIT CONTROL