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Tuesday
29 o£ Sep
1998.
Faxination
->5123390477
Page
3 o£
Installation
Procedures
I
Remove
line power
from
both
appliances
before
starting installation of the twinning kit.
2
Locale the Zl and Z2 connectic^s
along one edge of
each control
(see Figure
1).
The demgnalions
are
printed on top of the circuit board, and a black bar
shows the correct orientation
of the metal body which
will be pust_ed in to make connection.
3
Remove
furnace
casing
hole
plugs and route the
[winning leads through bushings provided as required,
and lengthen
if necessary
by splicing.
Be sure to
observe
the polarity required
so as lo match Z1 to Z1
and Z2 to Z2 (see Figure 2).
4.
Push the terminal into the slot on the circuit board
edge. Be sure to align the body with the black bar to
line up the solder finger below the circuit board (see
Figure 1). The terminal will "bite into" the solder and
make the necessary
connection. Repeat for each end
of both wires.
5
Locale and mount the isolation relay in the circulating
blower
compartment
on the
same
panel
as the
electronic fen control in furnace #1 (see Figure 1).
6,
Refer to single stage or two stage thermostat wiring as
noted below.
Single
Stage
Thermostat
Operation
Reference
Figure
3
1
Interconnect the thermostat
wiring in parallel from the
thermostat to the terminaJ blocks on each fan control.
for the "G" and '+Y"connections only
Interconnect the
winng from the "C" connections at the terminal blocks
on each fan control. Note: The "Y" connection ls not
required if air conditloning is not available.
2.
Connect wire from "W" connection at the thermostat to
the "W" connection of the electronic fan control of
furnace #1
3
Connect wire from "R" connection
at the thermoslat
to
the "R" connection
of the electronic
fan control of
furnace #1.
4.
Connect wire from the "W" connection of the electronic
fan control of furnace #1 to one side el the 24Vac coil of
the isolaUon relay (terminal #3)+ (Wire terminals
for
connection to the isolation relay are provided in the kit)
5,
Connect wire from the "C" connection of the electronic
fan control of furnace #1 to the other side of the 24Vac
coil of the isolation relay (terminal #1).
6.
Connect
one
wire to each
of the normally
open
terminals
of the isolation relay (terminals
#2 and #4)
and connect to the "R" and "W" connections
at the
electronic fan control of furnace #2.
7. -*S_t-the heat delay off timings on each control to the
same setting.
8.
Set thermostat
anticipator
setting at 090
9.
Recheck wiring connections,
splices, and insulation
Re-apply line power to both appliances.
Two Stage
Thermostat
Operation
Reference
Figure
3
1
Interconnect
the Ihermostat wiring in parallel from the
thermostat
to the terminal blocks on each fan control.
2,
for the "G' and 'Y' connections
only. Interconnect [_,e
wir+ng from the C" connections
at the terminal blocks
on each fan control.
Note. The "'Y" connection _snot
reduired if air conditioning is not availab t=
Connect wire from "WI"
of the thermostat
to the W'"
connection of the electronic fan control of furnace Pl.
3.
Connect wire from "W2" of the thermostat
to one side
of the 24Mac coil of the isolation
relay (terminal #3).
(VVire terminals for connection to the isolation relay are
provided in the kit)
4.
Connect wire from'R"
connection at the thermostat to
the "R" connection
of the electronic
fan control of
furnace #1.
5.
Connect wire from the "C" connection of the electronic
fan control of furnace #1 to the other side of the 24Vac
coil of the isolation relay (terminal #1).
6.
Connect
one wire to each
of the normally
open
terminals of the isolation relay (terminal #2 and #4) and
connect
to the 'R"
and
"W" connections
at the
electronic fan control of furnace #2.
7.
Set the heat delay off timings on each control Lo the
same setting.
8.
Set thermostat
anticipator
setting at 0.75 for the tst
stage and 0.15 for the 2rid stage.
9.
Recheck wiring connections, splices, and insulation.
Re-apply
line power to both appliances.
Twinning+Kit
Operation
1.
Turn
the heat/cool
switching
at the thermostat
to
"OFF", or set so neither a call for heating nor cooling _s
being made.
2.
Turn the fan switch to "ON" from "AUTO", or jumper
from '+R"to "G" at "furnace 1". Within several seconds,
the circulation blowers of each furnace will start at the
same
speed
connected
to their
respective
'heat =.
speed laps,
3.
Turn the fan switch to ='OFF" from "AUTO" or remove
the jumper from "R" to"G". Both circulation blowers will
stop after several seconds.
4.
Disconnect one wire from the high limit connection on
"furnace
1". Within several seconds, the circulation
blowers of each furnace will start at the same speed
connecled to their respective "heat" speed taps.
5.
Re-connect
the wire removed
from the high limit
connection on "furnace 1". After the completion of the
heating "blower off" delay, both blowers will stop.
6.
Repeat steps (4) and (5) with the limit connection
in
"furnace 2" versus :furnace 1".
The same operation
should result.
7.
8.
Operate
the system
through a normal call for heat,
burner on operation,
and burner off operation.
Each
furnace should fire and cycle both blowers, including
blower on and off delays, as in a normal single system.
Operate the system through a normal call for cooling.
The compressor
operation
should function normatiy.
with each furnace circulation
blower operating at the
speeds
connected
to their respective
"cool" speed
taps after cooling "blower on" delay. When the call for
cooling ends, Ihe circulation blowers will stop upon the
completion of the "cooling off" delay.
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