114
FIELD CONNECTION TERMINAL STRIPS — Field con-
nection terminal strips are located in the main control box. See
Fig. 28 and Table 113.
Accessory Control Components —
In addition to
the factory-installed options, the units can also be equipped
with several field-installed accessories that expand the control
features of the unit. The following hardware components can
be used as accessories.
ROOM THERMOSTATS (48/50AJ,AW ONLY) — The
Comfort
Link™ controls support a conventional electro-
mechanical or electronic thermostat that uses the Y1, Y2, W1,
W2, and G signals. The control also supports an additional
input for an occupied/unoccupied command that is available on
some new thermostats. The
Comfort
Link control can be
configured to run with multiple stages of capacity which allows
up to 6 stages of capacity. Although the unit can be configured
for normal 2-stage control, it is recommended that the multi-
stage control be used. The room thermostat is connected to
TB4.
SPACE SENSOR — The
Comfort
Link control supports the
use of space temperature sensors. The T55 and T56 sensors
and CCN communicating T58 room sensor can be used. The
T55 and T56 sensors are connected to TB5 terminal 3, 4, and 5.
The T58 sensor is connected to the CCN connections on TB3.
When a T55, T56, or T58 sensor is used, the user must install
the red jumpers from R to W1, and W2 on TB4 for the heat
function to work correctly.
SPACE CO
2
SENSORS — The
Comfort
Link control also
supports a CO
2
IAQ sensor that can be located in the space for
use in demand ventilation. The sensor must be a 4 to 20 mA
sensor and should be connected to TB5 terminal 6 and 7. See
Fig. 29 for sensor wiring.
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
1
2
3
4
5
6
7
8
R
Y1
Y2
W1 W2 G
C
X
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
TB5
TB6
TB3
TB4
C
LEN
CCN
CCN
+
- GRD
J6
TB4
1
2
3
4
5
6
7
1
2
3
4
5
6
7
TB5
UNIT CONTROL BOX
1
2
J3
J5
J4
B4
OVERRIDE
3
2
1
1
2
3
Fig. 28 — Field Connection Terminal Strips (Main Control Box)
Fig. 29 — CO
2
and Space Temperature Sensor Wiring (33ZCT55CO2 and 33ZCT56CO2)
A48-7081
A48-7306
Summary of Contents for WEATHERMAKER 48AJ020
Page 95: ...95 Fig 13 Typical Main Control Box Wiring Schematic A48 7787 ...
Page 96: ...96 TO NEXT PAGE Fig 14 Auxiliary Control Box Wiring Schematic A48 7294 ...
Page 98: ...98 Fig 15 Typical 2 Stage Gas Heat Wiring Schematic Size 051 and 060 Units Shown A48 6866 ...
Page 102: ...102 TO NEXT PAGE Fig 18 Typical Power Schematic Size 051 and 060 Units Shown A48 7298 ...
Page 104: ...104 Fig 19 Controls Option Wiring Schematic A48 7810 ...
Page 105: ...105 Fig 20 Small Chassis Component Location Size 020 035 Units A48 7301 ...
Page 106: ...106 Fig 21 Large Chassis Component Locations Size 036 060 Units A48 7302 ...