Models
9901
i
,
9915
i
and
9920
i
Quick Start Installation Manual
111-326C
Installation DOs and DON’Ts
DO
•
Shut off all power to system before installing.
•
Read entire manual before installing.
•
Make sure that all wiring conforms to national and
local codes.
DO NOT
•
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.
Recycling Thermostat
If this thermostat REPLACES a thermostat that contains mercury,
DO NOT discard the old thermostat in the regular trash. Mercury is harmful
to humans and the environment. For this reason, do not open, break, or
crush the mercury cell. If mercury leaks from a damaged cell, DO NOT
touch or handle mercury with bare hands. Use protective, non-absorbent
gloves to place mercury into a sealable container. Fill the container with
sand or another absorbent material and seal the container completely.
Return the mercury or mercury products, in a sealed container, to Invensys
Climate Controls or a local recycling center for proper disposal. If you have
any questions, call Robertshaw technical support at 1-800-445-8299.
Invensys Climate Controls
28C Leigh Fisher Blvd.
El Paso, TX 79906
Attn: Mercury Recycling Center
Select location for installation.
1
Open the case with a screwdriver. Place
in slot and gently pry forward at all four
locations.
Lift cover straight off. Do not pivot on
upper or lower retaining clips.
2
Mark mounting hole locations on wall.
3
Drill
3
/
16
” holes at marked locations on
wall. Insert plastic anchors into holes.
4
Align unit base over plastic anchors
embedded in wall and secure with the
screws provided.
5
Connect wiring between unit and
furnace. For Model 9901i (1H/1C
furnace applications).
6
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.
Y1
R
C
E/W1
A1 O B G
Thermostat
C - 24VAC Common
R - 24VAC
Y1
- 1st stage cooling
E/W1 - 1st stage heating
O - Not used
B - Not used
G - Fan
A1 -
Aux
contact
A2 -
Aux
contact
W2 - Not used
Y2
- Not used
L
- Not used
TERMINAL DESIGNATIONS
C
R
Y
W
G
B
O
9901
i
W2
A2
Y2
L
Equipment Wiring
Terminals
Please refer to
furnace installation
manual for proper
terminations
Remove 1/4” of insulation
from end of each wire
DELUXE
PROGRAMMABLE
THERMOSTATS
