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Soffit or Stair Riser Installation

1.  Cut opening as for kickspace installation (22 3/8” x 

 

3 5/8”).  Allow 3/4” clearance above cabinet doors.  

 

Add supports for unit (Fig.3).

2.  Proceed as for kickspace installation.  After 

 

securing unit in opening, install combination of 

 

frame and grille (fig.1).

CAUTION - Disconnect main to de-energize receptacle 

before servicing or for electrical inspection.

SERVICING - 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

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.

Thermostat Adjustment (CKHATD13 / CKHATD23)

Adjust thermostat with screwdriver. 

Fig. 3

Soffit or Stair Riser Installation
1.

Cut opening as for kickspace installation (22 3/8” x
3 5/8”).  Allow 3/4” clearance above cabinet doors.
Add supports for unit (Fig.3).

2.

Proceed as for kickspace installation.  After
securing unit in opening, install combination of
frame and grille (fig.1).

CAUTION - Disconnect main to de-energize receptacle
before servicing or for electrical inspection.

SERVICING - 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
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.

Thermostat Adjustment (CKHA20D31T)
Adjust thermostat with screwdriver.

Fig 3.

CEILING

HEATER

GRILLE

CABINET DOOR

PARTITION  OR

ADDED SUPPORT

3/4”

MIN

M

FAN

FACTORY CONNECTION

208/240 VOLT 675/900 WATTS

3.2 A / 3.7A

1

5

2

6

7

8

3

4

IMPORTANT:

RETIGHTEN ALL LEADS WITH CABLE CLAMP
AFTER RECONNECTING UNINSULATED ENDS OF
UNUSED LEADS WITH WIRE NUTS.

M

FAN

M

FAN

SAFETY SWITCH

SAFETY SWITCH

SAFETY SWITCH

FIELD CONNECTION

208/240 VOLT 1350/1800 WATTS

6.5 A / 7.5 A

FIELD CONNECTION

120 VOLT

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

1

5

2

6

7

8

3

4

1

5

2

6

7

8

3

4

NOTE:

If installing unit with factory thermostat, see
supplemental wiring diagram, fig. 4a.

Fig. 4a

Fig. 4

THERMOSTAT

7200960100R04

FACTORY CONNECTION

208/240 VOLT 675/900 WATTS

3.2 A / 3.7A

FACTORY CONNECTION

208/240 VOLT 1350/1800 WATTS

6.5 A / 7.5 A

FACTORY CONNECTION

120 VOLT

Fig. 4

FAN

FAN

FAN

M

M

M

SAFETY SWITCH

SAFETY SWITCH

SAFETY SWITCH

IMPORTANT:  

RETIGHTEN ALL LEADS WITH CABLE CLAMP

 

AFTER RECONNECTING UNINSULATED ENDS OF 

 

UNUSED LEADS WITH WIRE NUTS

Fig. 4a

THERMOSTAT

NOTE: 

If installing unit with factory thermostat, see

 

supplemental wiring diagram, Fig. 4a.

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

CATALOG NO.

MOTOR

FAN BLADE

ELEMENT

CUT OUT

(MANUAL)

CUT OUT

(AUTOMATIC)

GRILLE KIT

CKHA20D31

CKHABG

CKHA20D31W

CKHAWG

RKHA20D31W

2000280400RP

5300210100RP

2203260100RP

03005035RP

211A619RP

CKHAWG

REPLACEMENT PART

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