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Honeywell CT3300 Installation And Programming Instructions page 10

Weekday/weekend (5-day/2-day) programmable heat and/or cool low voltage (20 to 30 vac) thermostat and mounting plate
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Old thermostat terminals that do not match new thermostat terminals
Use the table below to wire the new thermostat.
Connect to New
Old Thermostat
Terminal
R, RH, 4, V
R*
Rc, R
Rc*
W, W
, H
W
1
Y, Y
, M
Y
1
G, F
G
O
Do not continue
installation
B
C, X, B
Do not connect
W
, H
Do not continue
2
2
installation.
Y
2
*Remove factory-installed jumper between R and Rc terminals in 5-wire systems.
69-1634—1
Thermostat
Terminal
Power
Power for cooling
Heat
Cooling
Fan
Changeover in cool (O terminal) or changeover in heat (B terminal).
You have a single-stage heat pump or zoning system. Select an alternate
thermostat model.
Transformer common.
Second stage heat (W
You have a multistage heating/cooling system. Select an alternate
thermostat model.
Description
, H
) or second stage cooling (Y
2
2
10
).
2

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