Lennox G26 series Installation Instructions Manual page 17

INTERIOR MAKE-UP BOXINSTALLATION
BUSHING
P69 from
Control Box
FIGURE 25
EXTERIOR MAKE-UP BOX INSTALLATION
MAKE-UP
BOX
BUSHING
J69
(Shown wlth
accessory
wire connected)
P69 from
Control Box
FIGURE 26
2- Remove cap from knockout in blower deck on the
same side as the installed make-up box.
AIMPORTANT
3 - Electrically ground unit in accordance with local codes
or, in the absence of local codes, in accordance with the
current National Electdc Code (ANSI/NFPA No. 70)
and in Canada with the current Canadian Electdc 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
4 -
5-
_
7-
8-
_
10-
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.
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- INSTALLING BROWN
ure 27. Any accessory rated ACCESSORY WIRE TOJ69
up to 4 amps can be con-
nected to this wire. Connect BROWN
the neutral leg of the acces-
sory to the neutral white wire NEUTRAL
in the make-up box. The ac-
cessory terminal is ener-
gized whenever the blower
is in operation.
Insert the three-pin (P69)
plug from the control box FIGURE 27
into the knockout provided in the blower deck.
Connect jack (J69) from make-up box to jack plug in
blower deck.
Select wire size accordingto the blower motoramps.
Snaphole bushing is provided for the widng entry hole
in the cabinet. A snaphole plug is provided to seal the
unused wire entry hole.
Install room thermostat according to instructionspro-
vided with thermostat. See figure 28 for thermostat des-
ignations. Iffurnace is being used with heat pump refer
to FM21 installation instruction.
Install a separate fused disconnect switch near the
unit so power can be turned off for servicing.
G26 and CONDENSING UNIT
THERMOSTAT DESIGNATIONS
(Refer to specific thermostat and outdoor unit.)
Thermostat G26 Condensing Unit
Furnace
_ _ HS UNIT
® coMP.Esso.
® ,NDOO,.LOWE, ®1
@
®
@
@j
owE, ®j .SUNiT
COMMON @ COMMON / _COMMON
FIGURE 28
11 - Complete widng connecfions to equipment using wiring
diagrams provided_ unitand in figures31 and 32. Use
18-gauge wire or larger for thermostat connections.
Page 17