Junction Box (J- Box) Relocation; Thermostat; Furnace Control; Humidifier/Electronic Air Cleaner - Arcoaire N9MP1 Installation Instruction

Junction Box (J- Box) Relocation

The J--Box is installed on left side of casing. An alternate J--Box
location on right side can be used.
1. Remove bag containing two hole plugs and two self tapping
screws from loose parts bag in blower compartment.
2. Remove two screws holding J--Box to casing.
3. Move large hole plug from right to left J--Box location.
4. Clip wire tie holding J--Box wires.
5. Move J--Box to alternate location and attach using two self
tapping screws from bag.
6. Apply two hole plugs from bag at left J--Box location.

Thermostat

Thermostat location has an important effect on the operation of the
unit. Follow instructions included with thermostat for correct
mounting and wiring.
Low voltage connections to furnace must be made on terminal
board of furnace control.
Heat anticipator setting will need to be measured if 24VAC
humidifier is installed. Measure current in series from R to W at the
thermostat. Be sure 24VAC humidifier is wired up to control. Allow
furnace to operate for 2 minutes before recording the AC
amperage reading. Set anticipator on thermostat to recorded
value.

Optional Equipment

All wiring from furnace to optional equipment MUST conform to
local codes or, in the absence of local codes with the latest edition
of The National Electric Code, ANSI NFPA 70 and/or The
Canadian Electric Code CSA C22.1. Install wiring in accordance
with manufacturer's instructions. The wiring MUST have a
minimum temperature rating of 105° C.

Humidifier/Electronic Air Cleaner

The furnace is wired for humidifier and/or electronic air cleaner
connection.
CAUTION
!
REDUCED FURNACE LIFE HAZARD.
Failure to follow caution may result in reduced
furnace life.
Do NOT exceed 115V/1.0 amp. maximum current
load for both the EAC terminal and the HUM
terminal combined.
HUMIDIFIER -- The HUM (115) is energized when the pressure
switch closes on a call for heat. The HUM is energized when
the inducer is energized.
ELECTRONIC AIR CLEANER -- EAC is energized when there
is a blower speed call, except is NOT energized when blower
operates in the hard--wired continuous fan mode.
38

Furnace Control

The furnace control is preset at the factory with a fixed blower ON
delay of 30 seconds in the heating mode. The blower OFF timing is
preset at 140 seconds. If desired, the fan OFF delay can be reset to
obtain the longest delay times while still maintaining comfort
levels. See "Furnace Wiring Diagram" .
NOTE: Junction Box can be
mounted to either the left or right
side.
NOTE: 115 VAC/60Hz/single--phase
Operating voltage range*: 127 VAC max, 104 VAC min.
* Permissible limits of voltage at which unit will operate satisfactorily
Furnace Control Fuse
The 24V circuit contains a 5--amp, automotive--type fuse located
on furnace control. (See Figure 41) Any electrical shorts of 24V
wiring during installation, service, or maintenance may cause fuse
to blow. If fuse replacement is required, use only a fuse of identical
size (5 amp.)
Figure 41
Specifications are subject to change without notice
Electrical Connections
Figure 40
115V. 60 Hz
W
BK
G
Connection
Box
Ground
R
Low Voltage
Terminal Board G
W
Y
G
W
R G
Control Board
Blower Off
Delay Jumper
24 VAC
HUM
FUSE
Models may
O N
O F F
have 1 or 2
pressure
switches
25--24--90--2
Diagnostic Light
115 VAC
HUM
EAC
25--24--98
440 01 1024 01