Robertshaw 800 Data Sheet

9801

i

9815

i

9820

i

111-321D

Shut off all power to system before installing.

Read entire manual before installing.

Make sure that all wiring conforms to
national and local codes.

Install on voltages greater than 30 VAC.

Short jumper across terminals on the gas
valve or at the system control.

Connect ground to any terminal in
this unit.

Install on outside walls or in direct sunlight.

Select location for installation.

Open the case with a screwdriver. Place
in slot and gently pry forward at all four
locations.

Mark mounting hole locations on wall.

Drill  

3

/

16

” holes at marked locations on

wall. Insert plastic anchors into holes.

Align unit base over plastic anchors
embedded in wall and secure with the
screws provided.

Connect wiring between unit and 
furnace. For Model 9801i (1H/1C 
furnace applications).

Cut

out

opening

a

b

1/4"

1-1/2"

1"

1

2

3

4

Mark mounting hole 
locations on wall using 
unit base as template.

Drill 3/16  holes

a

b

Press anchors into holes until flush.

Thermostat

C

- 24VAC Common

R

- 24VAC

Y1

- 1st stage cooling

E/W1 - 1st stage heating
O

- Not used

B

- Not used

G

- Fan

H

- Humidification

TERMINAL DESIGNATIONS

C

C

H

R

Y

W

G

B

O

Note: To avoid electrical problems, use the system transformer for both

the thermostat and humidifier.

9801

i

Humidifier

Equipment Wiring 
Terminals
Please refer to furnace 
installation manual for 
proper terminations

Remove 1/4” of insulation
from end of each wire