Lennox CBX40UHV Series Unit Information page 14

H−AIR HANDLER CONTROL 9−PIN CONNECTOR
1. Air Handler ONLY − 2−wire harness (Wired to points 7
and 8) from the factory provides 230 volt power to Air
Handler Control.
2. Air Handler with ECB40 Electric Heat − 8−wire harness
(Wired as noted in table 2)
NOTE − See Figure 4
Table 2. Stages
Position
& Wire Function / Description
Color
1 red Heat stage 1 relay coil
2 orange Heat stage 2 relay coil
3 yellow Relay coil return
4 black Heat stage 3 relay coil
5 brown Heat stage 4 relay coil
6 blue Heat stage 5 relay coil
7 black L1 230VAC supply from heater kit
8 red L2 230 VAC supply from heater kit
9 Not Used
THERMOSTAT CONNECTIONS
Table 3 (CBX40UHV−XXX−230−6−01 and −02)
Label Function
First−stage heating demand.
W1
Second−stage heating demand. W1 input must be active to
W2
recognize second−stage heat demand. .
Third−stage heating demand. W1 and W2 inputs must be
W3
active to recognize third stage heat demand.
Fan control input.
G
Y1 and
First and second−stage cooling inputs.
Y2
24VAC Common.
C
24VAC power.
R
24VAC output for Humiditrol
DH
24VAC output for humidification.
H
For Future Use ONLY. (DO NOT USE)
L
Reversing Valve input. (Energized by thermostat in cooling
O
mode or by heat pump defrost control in defrost mode.)
Blower speed control input for Harmony III
DS
mostat de−humidification control.
®
t
Zoning or ther-
Table 4. Air Handler Control Connections
Communicating (CBX40UHV−XXX−230−6−02)
Label Label
R
i+
Thermostat
i−
C
R
i+
Outdoor Unit
i−
C
i+
Link
i−
Table 5. Run Length
(CBX40UHV−XXX−230−6−02)
Wire Run Length
Maximum length of wiring
for all connections on the
RSBus is limited to 1500
feet (457 meters).
Table 6. Run Length
(CBX40UHV−XXX−230−6−01 and −02)
Wire Run Length
Less than 100' (30m)
More than 100' (30m)
Page 14
Function
24VAC
RSbus data high connection
RSbus data low connection
24VAC command (ground)
24VAC
RSbus data high connection
RSbus data low connection
24VAC command (ground)
Not used.
Communicating
AWG # Insulation/Core Types
Color−coded, temperature
º º
rating 95 F (35 C) minimum,
18
solid core. (Class II Rated
Wiring)
Non−Communicating
AWG # Insulation/Core Types
Color−coded, temperature
18
º º
rating 95 F (35 C) minimum,
solid core. (Class II Rated
16
Wiring)
CBX40UHV