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Under Cabinet Heater
RKHA Series
IMPORTANT INSTRUCTIONS
When using electrical appliances, basic precautions should always be followed to reduce the risk of re, electric
shock, and injury to persons, including the following:
1. Read all instructions before using the heater.
2. The heater is hot when in use. To avoid burns, do not let bare skin touch hot surfaces. The trim around the heater
outlet becomes hot during heater operation. Keep combustible materials, such as furniture, pillows, bedding,
papers, clothes, and curtains at least 3 ft (0.9 m) from the front of the unit and keep them away from the sides
and rear.
3. Extreme caution is necessary when any heater is used by or near children or invalids and whenever the unit is
left operating and unattended.
4. Do not operate any heater after it malfunctions. Disconnect power at the service panel and have the heater
inspected by a reputable electrician before reusing.
5. Do not use outdoors.
6. To disconnect the unit, turn the controls o, and then switch o at main power supply panel.
7. Do not insert or allow foreign objects to enter any ventilation or exhaust opening as this may cause an electric
shock or re, or damage to the heater.
8. To prevent a possible re, do not block air intake or exhaust in any manner.
9. All electrical heaters have hot and arcing or sparking parts inside. Do not use in areas where gasoline, paint, or
ammable liquids are used or stored.
10. Do not modify this heater. Use it only as described in this manual. Any other use not recommended by the
manufacturer may cause re, electric shock, or injury to persons.
SAVE THESE INSTRUCTIONS
gasoline or other ammable vapors or liquids in the vicinity of
the heater.
Installation Instructions
WARNING: To reduce the risk of re, do not store or use
CAUTION: High temperature, risk of re, keep electrical
cords, drapery, furnishings, and other combustibles at least
3 feet (0.9 m) from the front of the heater.
!
NOTE: It is extremely important to read all information
labels. Care must be taken to ensure that the heater
is rated the same voltage as the electrical supply wires.
Failure to do so could result in unsafe heater operation as
well as damage to the unit. If replacing an existing heater,
check the labels of the old heater to ensure the voltage of
the new heater is compatible.
!
NOTE: Care must be taken to prevent undue strain on all
wiring or heating element assembly, when removing and
re-assembling heating element assembly.
CAUTION: For eld rewiring to 120V all leads must be
secured under wire clamps.
!
NOTE: Air and grille temperatures conform to CSA & UL
regulations but may discolour certain materials, particularly
those materials incorporating clear vinyl. Materials should
be checked prior to installation to determine if discolouration
or distortion would occur in the vicinity of 60° C (140° F)
!
NOTE: This heater needs to be installed with a line voltage-
thermostat or the optional built-in thermostat (CKHATD23)
Under Cabinet Heater Installation
!
NOTE: Unit should be installed so that it is not directly under
sink or other frequently used work area as air temperature
may be uncomfortably warm. Also, if carpeting is on oor,
mount unit so bottom of grille is level or above the top of the
carpet pile.
1. Measure area of intended use. The optional grille trim may
be used if required. Otherwise the frame may be removed
by removing grille frame from heater (screw “A”), remove
frame and re-insert grille.
7200960100R013
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2. Cut 22 ⅜ in (568 mm) x 3 ⅝ in (92 mm) opening (Figure
2). Keep clearance area free of obstructions.
3. Bring in service cable to left or rear of 10 in (254 mm)
minimum area as shown in Fig. 2.
4. Remove heater cover and appropriate knockout. Attach
service cable to unit with approved connector and connect
the appropriate power wires in outlet box. To change
wattage or voltage connections, see Figure 5.
5. Replace cover, slide unit into opening, and secure each
side (Figure 1).
!
NOTE: Make sure unit is installed right side up. Refer
to “TOP” label.
FIGURE 1
Heater Cover
Top Label
Junction Box Cover
Screw ‘C’
Heater
Element
Sot or Stair Riser Installation
1. Cut opening as for heater installation (22 ⅜ in
(568 mm) x 3 ⅝ in (92 mm)). Allow ¾ in (19 mm) clearance
below cabinet doors. Add supports for unit (Figure 3).
2. Proceed as for heater installation. After securing unit in
opening, install combination of frame and grille if desired
(Figure 1).
Operation
WARNING: This heater must be properly installed before it
is used.
1. Prior to powering on the unit, remove all construction dirt
(plaster, sawdust, etc.) from interior and exterior of heater.
2. If the unit is installed using the eld-installed built-in
thermostat (CKHATD23), adjust the thermostat with pliers.
This unit can also be controlled from a line voltage single
pole or double pole wall thermostat.
Dimplex Under Cabinet heaters are designed and tested
for safe and trouble-free operation and are protected
against overheating by a built-in thermal cutout. Free airow
throughout the heater is extremely important for the most
ecient operation of the heater. Restricted airow may cause
the thermal overload protector to cycle the heater “ON and
OFF”. A cycling heater will not supply sucient heat to the
room.
Avoid direct contact of paper, fabric, or furniture with heater.
Screw ‘A’
FIGURE 2
Service
SERVICE
CABLE
Cable
KNOCKOUTS
Knockouts
FIGURE 3
CEILING
GRILLE
CABINET
DOOR
FIGURE 4
CABINET
DOOR
GRILLE
FLOOR
HEATER
HEATER
10" MIN.
10" MIN.
22"
22"
Screw‘B’
Grille
Optional Grille Frame
22-3/8"
22 3/8"
3-1/2"
3 1/2"
9-1/2"
9 1/2"
CLEARANCE 5" MIN.
PARTITION
OR ADDED
SUPPORT
PARTITION
OR ADDED
SUPPORT
3-5/8"
3 5/8"
3/4"
MIN.
3/4
MIN.
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Maintenance
WARNING: Disconnect power and allow heater to cool
before attempting any maintenance or cleaning to reduce
the risk of re, electric shock, or injury to persons.
Remove grille and frame by removing screws “A”. Remove
two screws “B”, and slide out heating assembly. When
re-assembling, reverse the procedure above.
Cleaning
!
NOTE: This heater should not be operated with an
accumulation of dust or dirt on or in the unit, as this can
cause a build-up of heat and eventual damage. For this
reason the heater must be inspected regularly, depending
upon conditions and at least at yearly intervals.
FIGURE 5
Factory Wiring
208/240 675/900 WATTS
3.2 A / 3.7A
Field Wiring
208/240 1350/1800 WATTS
6.5 A / 7.5 A
• With grille in place - Use vacuum cleaner hose to suck
out lint and dirt around grille. Reverse hose on vacuum to
use as a blower to move dust out of enclosure. Reverse
hose back to suck out dirt at front area of heater.
• With grille removed - Remove two screws “B” at bottom
front of heating element assembly. Pull gently to remove
it from enclosure. Swing assembly out. Vacuum inside of
enclosure and around heating element assembly. Reverse
procedure above to re-assemble unit.
Field Wiring
120 V
FAN
M
Safety Switch
FAN
M
Safety Switch
IMPORTANT: Terminate unused leads with wire nuts and
retighten all leads with cable clamp
NOTE: See supplemental wiring diagram for thermostat wiring, Figure 5a.
FAN
M
Safety Switch
RATING CONNECT
450W / 3.75A 7-8 (AS SHOWN)
900W / 7.5A 7-8, 1-2
1350W / 11.2A 7-8, 1-2, 3-4
1800W / 15A 7-8, 1-2, 3-4, 5-6
FIGURE 5a
THERMOSTAT
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Warranty
The Manufacturer warrants the heating elements and
components of the enclosed product against any defect in
material or workmanship for a period of one year from the
date of purchase. In full satisfaction of any claims under
this Warranty the Manufacturer will repair or replace without
charge, in its factory or in the eld as it alone may decide, any
parts which in its opinion are defective.
The Manufacturer shall not be responsible for any transportation
or shipping costs in relation to such repair or replacement
except as specically assumed by it. Misuse of this product or
repairs by persons other than the Manufacturer’s authorized
personnel without the Manufacturer’s written approval, will
void this Warranty.
This Warranty is in lieu of all other warranties or conditions
whether expressed or implied including but not limited to those
of merchantability or tness for purpose and shall constitute
the sole remedy of the Purchaser and the sole liability of the
Manufacturer in respect of the sale of the product, whether
in the nature of breach or breach of fundamental term, or of
negligence or otherwise.
The Manufacturer shall not be liable for any special, indirect
or consequential damages or for any damages resulting from
removal or replacement of a heater subject to warranty claim
without the Manufacturer’s authorization.
This Warranty is transferable by the original consumer
purchaser of the product. Any claims under this Warranty
must be brought to the attention of Technical Support at
www.dimplex.com/customer_support or by phone at
1-888-346-7539. Limited warranty service requires a proof of
purchase of the product.
Replacement Parts
Motor 2000280400RP
Fan Blade 5300210100RP
Element 22003260100RP
Cut out (Manual) 03005035RP
Cutout (Automatic) 211A619RP
Grille Kit (Black) CKHABG
Grille Kit (White) CKHAWG
Grille Kit (Silver) CKHASG
1-888-346-7539 | www.dimplex.com
In keeping with our policy of continuous product improvement,
we reserve the right to make changes without notice.
© 2019 Glen Dimplex Americas
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