60-2034—7
4
RA890F
INSTALLATION
Installation
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to fol-
low them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced, flame safe-
guard control technician.
4. After installation is complete, check out product op-
eration as provided in these instructions.
CAUTION
1. Disconnect power supply before beginning in-
stallation to prevent electrical shock and equip-
ment damage.
2. All external timers must be Listed or Component
Recognized by authorities that have jurisdiction
for the specific purpose for which they are used.
Refer to Fig. 3 and 4 for typical field wiring connections.
See Fig. 5 for schematic diagram. Follow the burner manu-
facturer’s instructions if supplied. Otherwise proceed as
follows.
LOCATION
Temperature
Install the RA890F where the surrounding temperatures
remain within the Ambient Operating Temperature Ratings
listed in the SPECIFICATIONS section.
Humidity
Install the RA890F where the relative humidity never
reaches the saturation point. Condensation of moisture on
the RA890F may cause enough leakage to short the flame
signal to ground and prevent the burner from starting.
Vibration
Do not install the RA890F where it could be subject to
excessive vibration. Vibration shortens the life of the elec-
tronic and mechanical components.
Weather
The RA890F is not designed to be weathertight. If it is
installed outdoors, use a suitable weathertight enclosure.
Mount Subbase
Locate the subbase where ambient temperature is within
the specified rating.
Mount the subbase so the top and bottom are horizontal
and the back is vertical. The subbase can lean backward as
much as 45 degrees when necessary. See Fig. 1.
Fig. 1—Mounting subbase in in. (mm).
M8681
HORIZONTAL
VERTICAL
2-7/8
(73.0)
4-1/8 (104.8)
KNOCKOUTS (9) FOR
1/2 IN. (13) CONDUIT
45 DEGREES
MAXIMUM LEAN
WIRE SUBBASE
1. Disconnect power supply (see Fig. 2) before making
wiring connections to avoid electrical shock and equipment
damage. Assure all wiring complies with applicable electri-
cal codes, ordinances, and regulations. Use NEC Class 1
(line voltage) wiring.
When wiring the Q270A Universal Mounting Base for
use with the RA890F, use the terminal designations 6, T and
T (printed in white).
2A. For normal installations, use moisture-resistant
No. 14 wire suitable for at least 167
°
F (75
°
C). For
high temperature installations, use moisture-resis-
tant 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 25,000V.)
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 was tested for operation up to 600V and
breakdown up to 7500V.)
2B. 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 inter-
mittent use.