Application; Installation - Lennox LGH 036 Installation Instructions Manual

LONWORKS NETWORK
TRANSMIT LED (L1)
LED (L2) NOT USED
LONWORKS NETWORK
RECEIVE LED (L3)
SYSTEM READY LED
SYSBUS (SBUS) NET-
WORK CONNECTION

Application

The LonTalk module allows communication between the
Lennox unit controller and a LonWorks
module translates input and output variables between Len-
®
nox L Connection protocol and the LonWorks network.
®
The LonTalk Module has been developed to communi-
cate with building automation systems. The functional pro-
files are proprietary in content and will require the integra-
tor to use the datapoint information included in the service
manual.
Either a Lennox zone sensor or a LonTalk network zone sen-
sor is required to send the zone temperature to the unit con-
troller.
WARNING
Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.

Installation

CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
1. Disconnect all electrical power to unit.
24VAC
HOT
SYSBUS
+ −
COM
Figure 2. LonTalk
2. Open compressor section access doors.
3. Begin installation depending on unit size as follows:
®
network. The
4. Route the SYSBUS network cable to the IMC SYS-
5. For M1−7, M1−8 Locate the thermostat wire provided
5. For M2 Connect power leads to gray COM (24VAC
6. If module is field−installed, locate the temperature con-
Page 2
LONWORKS SERVICE
PIN
LONWORKS NETWORK
CONNECTION
POWER INDICATION LED
24VAC POWER CONNEC-
TION
MOUNTING HOLES (4)
®
Module
A Box (036−060 units) Position the LonTalk module
in the compressor section as shown in figure 3. Secure
with four #6 screws.
B, C, & D Box (150/360 units)
ing plate in the location shown in figure 5. Secure with
7/8" screws. Install the LonTalk module on the mount-
ing plate and secure with #6 screws.
E Box (420/600 units)
beneath the IMC board as shown in figure 4. Secure
with four #6 screws.
BUS terminal block. Secure network cable away from
all power cables. Connect the cable shield drain wire
to the G" terminal on the controller. Do not connect the
cable shield drain wire to the LonTalk module (see fig-
ure 6).
in this kit. Connect one wire between the LonTalk mod-
ule 24v. hot and the rooftop unit TB1 terminal 6. Con-
nect the other wire between the LonTalk module com-
mon and the rooftop unit TB1 terminal 7. See wiring
diagram provided in this kit or on the inside of the com-
pressor access panel.
return) and the red 24VAC service wire terminals.
trol wiring diagram sticker on the inside of the com-
pressor access panel. Affix the C68 temperature con-
trol wiring diagram (provided in this kit) over the
existing diagram.
Position the mount-
Position the mounting plate