Parker RK 11861 User manual

Heater Relay Kits
For 12 and 24 Volt DC Applications
Contact Information
Parker Hannin Corporation
Racor Division
P.O. Box 3208
3400 Finch Road
Modesto, CA 95353
phone [phone]
209 521 7860
fax [phone]
[e-mail]
www.parker.com/racor
Overview
A relay kit may be necessary when
installing a Racor heater due to
power demand. Standard OE fuses,
wiring and alternator may be unable
to carry the load without overheating
or potential shorting, creating a
serious condition.
Racor relay kit’s provide higher
amperage power to the Racor heater
using the relay as an independent
‘switch’. The relay coil is energized
either from a manual toggle switch
or by means of activation, such as a
thermostat.
Note: Ensure the electrical supply
system can support the power
demands of the fuel heater
(and other accessories) prior to
installation.
Instruction Part Number 11-2012 Rev A
VOLT AMPS WATT Part Number
12 25 300 RK 11861
24 12.5 360 RK 11862
12 60 720 RK 19490-12
24 60 1440 RK 19490-24
Note: RK 11861/RK 11862 include fuse and holder, RK 19490 kits have them built in.
Special Notes: Do not use on gasoline applications.

Wiring Diagrams
Battery
+ -
Fuse
12 vdc = 25 amp
24 vdc = 15 amp
Ignition
Switch
Relay
Optional
Toggle
Switch
Racor
Fuel
Heater
Racor 2-wire Heater
Connection Diagram
Racor ‘2-wire’ fuel heaters
have no polarity!
Either wire may be used for hot (+)
or ground (-).
30
86
87
85
Black 14
Red 18 White 18
Schematic A - For Light Duty Power Relay Kits: RK 11861 and RK 11862
Refer to applicable diagrams
Installation Instructions for all Kits
1. Before beginning, familiarize
yourself with the steps to be
taken and ensure all hardware,
wiring, necessary terminals
and tools are on hand.
2. Disconnect vehicle battery
ground cable before splicing
or connecting the relay unit to
avoid electrical shock or re.
3. e power relay unit should be
mounted in a location which
oers protection from harsh
environments or contact with
moving parts. An engine or
cab compartment is suitable.
4. Solder all electrical terminals
to reduce electrical resistance
and ensure a durable
connection.
5. Ensure all wires are routed
in a manner to oer the best
protection from contact with
other moving parts which can
lead to chang and shorting
out of components.
6. Use provided wire ‘zip-ties’ to
secure wires to avoid vibration
and movement - obtain more
if needed.
7. Where additional wire lengths
may be needed, ensure the
same gauge (AWG) and color
(if possible) is used. Solder all
connections and use shrink
tubing to protect exposed
wires.
8. Never operate power relay
unit when there is no fuel in
heated Racor product. is can
permanently damage heater
and related products and
potentially start a re.
9. Follow Installation and Use
Instructions provided with
Racor products.
10.In event of a failed fuse,
determine reason for failure
before replacing.
11.Always disconnect power from
the relay unit when servicing it
or heated Racor products.
Green 14
+
+ +
_
Fuse Box
1A Min.

Battery
+ -
Fuse
12 vdc = 25 amp
24 vdc = 15 amp
Ignition
Switch
Racor
Fuel
Heater
Racor 3-wire Heater
Connection Diagram
Racor ‘3-wire’ fuel heaters have polarity!
Red wire is for hot (+)
Black wire is for ground (-) and
White activates the power relay.
30
86
87
85
black 14
Green 14
red 14
white 18
Optional
Toggle
Switch
Schematic B - For Light Duty Power Relay Kits: RK 11861 and RK 11862
Battery
+ -
Ground
Ignition
Switch
Fuse Box
Rocker
Switch*
Detachable
Connector
Racor 2-wire Heater
Connection Diagram
Schematic C - For Heavy Duty Power Relay Kits: RK 19490-12 and RK 19490-24
Red 18
YLW 18 (2)
Fuse Location
60 amp
Red 10
Black 18
1A Min.
Red 18
Black 14
+
+ +
-
White 18
Fuse Box
1A Min.
Alternator:
Positive (+)
Output Terminal
Racor
Fuel
Heater
Red 10
Black 10

March 2011© Parker Hannin Corporation
All products manufactured
or distributed by Racor are
subject to the following, and
only the following, LIMITED
EXPRESS WARRANTIES, and
no others: For a period of
one (1) year from and after
the date of purchase of a new
Racor product, Racor warrants
and guarantees only to the
original purchaser-user that
such a product shall be free
from defects of materials
and workmanship in the
manufacturing process. The
warranty period for pumps and
motors is specifically limited
to ninety (90) days from date of
purchase. A product claimed to
be defective must be returned
to the place of purchase. Racor,
at its sole option, shall replace
the defective product with a
comparable new product or
repair the defective product.
This express warranty shall be
inapplicable to any product not
properly installed and properly
used by the purchaser-user
or to any product damaged or
impaired by external forces.
THIS IS THE EXTENT OF
WARRANTIES AVAILABLE
ON THIS PRODUCT. RACOR
SHALL HAVE NO LIABILITY
WHATSOEVER FOR
CONSEQUENTIAL DAMAGES
FLOWING FROM THE USE OF
ANY DEFECTIVE PRODUCT
OR BY REASON OF THE
FAILURE OF ANY PRODUCT.
RACOR SPECIFICALLY
DISAVOWS ALL OTHER
WARRANTIES, EXPRESS
OR IMPLIED INCLUDING,
WITHOUT LIMITATION, ALL
WARRANTIES OF FITNESS
FOR A PARTICULAR PURPOSE
(EXCEPT FOR THOSE WHICH
APPLY TO PRODUCT OR
PART THEREOF THAT IS
USED OR BOUGHT FOR USE
PRIMARILY FOR PERSONAL,
FAMILY, OR HOUSEHOLD
PURPOSES), WARRANTIES OF
DESCRIPTION, WARRANTIES
OF MERCHANTABILITY,
TRADE USAGE OR
WARRANTIES OR TRADE
USAGE.
Warning
Failure or improper selection
or improper use of the
products and/or systems
described herein or related
items can cause death,
personal injury and property
damage. This document and
other information from Parker
Hannifin Corporation, its
subsidiaries and authorized
distributors provide product
and/or system options for
further investigation by users
having technical expertise.
It is important that you
analyze all aspects of your
application and review the
information concerning the
product or system in the
current product catalog. Due
to the variety of operating
conditions and applications
for these products or systems,
the user, through its own
analysis and testing, is solely
responsible for making the
final selection of the products
and systems and assuring that
all performance, safety and
warning requirements of the
applications are met.
The products described
herein, including with
limitation, product features,
specifications, designs,
availability and pricing, are
subject to change by Parker
Hannifin Corporation and
its subsidiaries at any time
without notice.
The following statement
is required pursuant to
proposition 65, applicable
in the State of California:
‘This product may contain a
chemical known to the State of
California to cause cancer or
reproductive toxicity’.
Limited Warranties Statement