A. Select location to place sensor. For gas/electric HVAC systems, sen-
sor must be in leaving air duct, preferably as far from the coil/heat
exchanger as possible but not past the bypass tap. For heat pumps,
sensor must be placed between coil and auxiliary heat. If heat
pump does not have auxiliary heat, place sensor as specified for
gas/electric system.
See Figure 1
.
B. Cut or drill a hole in selected location large enough to fit sensor
through.
C. For 101CAPGE, TRLAT, SYCAP, CAPL-2 and CAPL-4, determine if
Capacity Controller will be mounted integral with sensor or remote
from sensor. Mounting sensor remotely enables you to place the
Capacity Controller in a location easily visible and serviceable.
D. For the 101ALAS, TRFPC, or if mounting any other model with the
sensor integral with Capacity Controller, place sensor through hole made
in duct and mount Capacity Controller to duct with screws. Use grommet
or tape to protect sensor wire from sharp edges.
See Figure 2
.
E. If mounting sensor remotely, refer to
Figure 3
and do the following:
1. On Capacity Controller, and – terminal screws and
disconnect sensor.
2. Remove circuit board screws and pull circuit board away from
casing.
3. Pull sensor out of casing.
4. Reattach circuit board to casing with screws previously removed.
6. Place sensor in hole made in duct and secure with tape, wire tie
or cable clamp. Use grommet or tape to protect sensor wire from
sharp edges.
7. Select location for Capacity Controller and mount with screws.
8. Wire sensor to Capacity Controller, red to + and white to –. If less
than 200 feet, use separate 18 gauge, two conductor wire. If over
200 feet, use separate two conductor shielded wire and connect
shield to TR2 or C terminal of Capacity Controller.
C
A
P
A
C
I
T
Y
Sensor
Protect sensor wire from
sharp edges by using
grommet or tape.
C
O
N
T
R
O
L
L
E
R
Protect sensor wire from
sharp edges by using
grommet or tape.
Secure sensor with tape,
cable clamp or wire tie
White
Red
+
-
White to –
Red to +
Circuit board screws (qty. 3)
If using shielded wire, connect
shield to TR2 or C
BYPASS
TAP
BYPASS
RETURN
AIRFLOW
GAS/ELECTRIC
BYPASS
TAP
BYPASS
RETURN
Place sensor in heat
pump between coil and
auxiliary heat
AIRFLOW
HEAT PUMP
C
O
I
L
C
O
I
L
H
E
A
T
A
U
X
Place sensor in supply duct,
as far from coil/heat exchanger
as possible but not past
Bypass tap.
Figure 3. Capacity Controller with Remote Sensor
Figure 2. Capacity Controller Mounted with Sensor
CAPACITY CONTROLLERS – INSTALLATION
Figure 1. Sensor Location
40
