Carrier 33CS Installation And Operating Instructions Manual page 7

4. Press the Fan button repeatedly until the Fan icon appears
with a single bar next to it. Confirm that the fan is running
at low speed. Press the Fan button again. The Fan icon
appears with two bars next to it. Confirm that the fan is
running at medium speed. Press the Fan button again.
The Fan icon appears with three bars next to it. Confirm
that the fan is running at high speed. Press the Fan button
again. The bars next to the Fan icon should disappear.
When no bars are shown, the fan will operate in the
AUTO mode. The fan speed will automatically change
based on load requirements.
5. Press the Mode button repeatedly until the Cool icon
appears on the display. The thermostat is now in Cooling
mode.
6. Press the DOWN ARROW button until the cooling set
point is 10 F (6 C) lower than the current room tempera-
ture. The cold water valve will open and the fan should be
energized.
7. Press the Mode button repeatedly until the OFF icon
appears. Both valves should be closed and the fan should
be off.
8. If heating, cooling, or fan do not operate properly, check
wiring and consult Table 4.
TWO-PIPE OPERATION WITH CHANGEOVER SEN-
SOR AND NO STRIP HEAT — To check thermostat opera-
tion of a 2-pipe system with changeover sensor, perform the
following procedure:
1. Turn on power to fan coil unit.
2. Make sure the thermostat is correctly configured for use
in two-pipe applications. Advanced Setup Step 3 should
be set to 2 (two-pipe applications). Advanced Setup Step
4 should be set to 3 (heat/cool changeover system without
electric heat).
3. Press the Fan button repeatedly until the Fan icon appears
with a single bar next to it. Confirm that the fan is running
at low speed. Press the Fan button again. The Fan icon
appears with two bars next to it. Confirm that the fan is
running at medium speed. Press the Fan button again.
The Fan icon appears with three bars next to it. Confirm
that the fan is running at high speed. Press the Fan button
again. The bars next to the Fan icon should disappear.
When no bars are shown, the fan will operate in the
AUTO mode. The fan speed will automatically change
based on load requirements.
4. If hot water heat is available, press the Mode button
repeatedly until the Heat icon appears on the display. The
thermostat is now in Heating mode.
5. Press the UP ARROW button until the heating set point is
10 F (6 C) higher than the current room temperature.
The hot water valve will open and the fan should be
energized.
6. If cold water cooling is available, press the Mode button
repeatedly until the Cool icon appears on the display. The
thermostat is now in Cooling mode.
7. Press the DOWN ARROW button until the cooling set
point is 10 F lower than the current room temperature.
The cold water valve will open and the fan should be
energized.
8. Press the Mode button repeatedly until the OFF icon
appears. The valve should be closed and the fan should
be off.
9. If heating, cooling, or fan do not operate properly, check
wiring and consult Table 4.
TWO-PIPE OPERATION WITHOUT CHANGEOVER
SENSOR — To check thermostat operation with a 2-pipe
system without changeover sensor, perform the following
procedure:
1. Turn on power to fan coil unit.
2. Make sure the thermostat is correctly configured for use
in two-pipe applications. Advanced Setup Step 3 should
be set to 2 (two-pipe applications). Advanced setup Step
4 should be set to 1 (heat only), 2 (cool only), or 5 (cool-
ing with total electric heat).
3. Press the Fan button repeatedly until the Fan icon appears
with a single bar next to it. Confirm that the fan is running
at low speed. Press the Fan button again. The Fan icon
appears with two bars next to it. Confirm that the fan is
running at medium speed. Press the Fan button again.
The Fan icon appears with three bars next to it. Confirm
that the fan is running at high speed. Press the Fan button
again. The bars next to the Fan icon should disappear.
When no bars are shown, the fan will operate in the
AUTO mode. The fan speed will automatically change
based on load requirements.
4. If heating is available, press the Mode button repeatedly
until the Heat icon appears on the display. The thermostat
is now in Heating mode. Press the UP ARROW button
until the heating set point is 10 F (6 C) higher than the
current room temperature. Heating will energize (the hot
water valve will open or the strip heat will energize) and
the fan will run.
5. If a cooling only or cooling only with strip heat system,
press the Mode button repeatedly until the Cool icon
appears on the display. The thermostat is now in Cooling
mode. Press the DOWN ARROW button until the cool-
ing set point is 10 F lower than the current room tempera-
ture. The cold water valve will open and the fan will run.
6. Press the Mode button repeatedly until the OFF icon
appears. The valve should be closed and the strip heater
and fan should be off.
7. If heating, cooling, or fan do not operate properly, check
wiring and consult Table 4.
TWO-PIPE OPERATION WITH CHANGEOVER SEN-
SOR AND STRIP HEAT — To check thermostat operation
of a 2-pipe system with changeover sensor and strip heat, per-
form the following procedure:
1. Turn on power to fan coil unit.
2. Make sure the thermostat is correctly configured for use
in two-pipe applications. Advanced Setup Step 3 should
be set to 2 (two-pipe applications). Advanced setup
Step 4 should be set to 4 (heat/cool changeover system
with auxiliary electric heat).
3. Press the Fan button repeatedly until the Fan icon appears
with a single bar next to it. Confirm that the fan is running
at low speed. Press the Fan button again. The Fan icon
appears with two bars next to it. Confirm that the fan is
running at medium speed. Press the Fan button again.
The Fan icon appears with three bars next to it. Confirm
that the fan is running at high speed. Press the Fan button
again. The bars next to the Fan icon should disappear.
When no bars are shown, the fan will operate in the
AUTO mode. The fan speed will automatically change
based on load requirements.
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