Page 17
FIGURE 25
INTERIOR MAKE-UP BOX INSTALLATION
P69 from
Control Box
J69
MAKE-UP
BOX
BUSHING
FIGURE 26
EXTERIOR MAKE-UP BOX INSTALLATION
P69 from
Control Box
J69
(Shown with
accessory
wire connected)
MAKE-UP
BOX
BUSHING
2 - Remove cap from knockout in blower deck on the
same side as the installed make-up box.
IMPORTANT
Ignition control will not operate unless unit is properĆ
ly grounded. 120V supply must be installed with corĆ
rect polarity.
3 - Electrically ground unit in accordance with local codes
or, in the absence of local codes, in accordance with
the current National Electric Code (ANSI/NFPA No.
70) and in Canada with the current Canadian Electric
Code part 1 (CSA standard C22.1). The ground wire is
pro-vided in the field make-up box.
To ensure proper grounding of the furnace, two star
washers are included in the electrical make-up box
bag assembly. Place the star washer on securing
screw before installing the make-up box. Make sure
the star washer breaks the paint on the cabinet so
that the washer is touching metal. Unit is not prop-
erly grounded if paint has not been removed by star
washer.
4 - An optional 120 volt accessory wire is provided with
G26 units. Install brown accessory wire into J69 jack
plug by inserting the pin of the brown wire into the open
socket of the jack. See fig-
ure 27. Any accessory rated
up to 4 amps can be con-
nected to this wire. Connect
the neutral leg of the accesĆ
sory to the neutral white wire
in the make-up box. The acĆ
cessory terminal is enerĆ
gized whenever the blower
is in operation.
5 - Insert the three-pin (P69)
plug from the control box
into the knockout provided in the blower deck.
6 - Connect jack (J69) from make-up box to jack plug in
blower deck.
7 - Select wire size according to the blower motor amps.
8 - Snaphole bushing is provided for the wiring entry hole
in the cabinet. A snaphole plug is provided to seal the
unused wire entry hole.
9 - Install room thermostat according to instructions pro-
vided with thermostat. See figure 28 for thermostat desĆ
ignations. If furnace is being used with heat pump refer
to FM21 installation instruction.
10 - Install a separate fused disconnect switch near the
unit so power can be turned off for servicing.
FIGURE 28
COMPRESSORā
COMMON
POWER
HEAT
INDOOR BLOWER
Y
C
R
G
C
R
W
G
COMMON
HS UNIT
COMMON
HS UNIT
COMPRESSOR
Y
C
R
G
C
R
W
G
G26
Furnace
Condensing Unit
Thermostat
G26 and CONDENSING UNIT
THERMOSTAT DESIGNATIONS
(Refer to specific thermostat and outdoor unit.)
COOLING
11 - Complete wiring connections to equipment using wirĆ
ing diagrams provided with unit and in figures 31 and
32. Use 18-gauge wire or larger for thermostat conĆ
nections.
BLACK
WHITE
NEUTRAL
BROWN
J69
INSTALLING BROWN
ACCESSORY WIRE TO J69
FIGURE 27
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