Allied Air Enterprises 4AC16LT - Manual (Page 3)

506467-01 Issue 1008
Electrical Wiring
All field wiring must be done in accordance with the National
Electrical Code (NEC) recommendations, Canadian
Electrical Code (CEC) and CSA Standards, or local codes,
where applicable.
Page 3
Unit must be grounded in accordance with national and
local codes. Failure to ground unit properly can result in
personal injury or death.
WARNING
Figure 2
Slab Mounting
Discharge Air
Mounting Slab
Ground Level
Building
Structure
Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
rating plate for minimum circuit ampacity and maximum
overcurrent protection size.
1. Install line voltage power supply to unit from a properly
sized disconnect switch. Any excess high voltage field wiring
should be trimmed or secured away from the low voltage
field wiring.
2. Ground unit at unit disconnect switch or to an earth ground.
To facilitate conduit, a hole is in the bottom of the control
box. Connect conduit to the control box using a proper
conduit fitting. Units are approved for use only with copper
conductors. 24V Class II circuit connections are made in
the low voltage junction box. A complete unit wiring diagram
is located inside the unit control box cover (see also page
22 of this instruction).
3. Install room thermostat on an inside wall that is not subject
to drafts, direct sunshine, or other heat sources.
4. Install low voltage wiring from outdoor to indoor unit and
from thermostat to indoor unit (See Figure 3).
5. Do not bundle any excess 24V control wire inside control
box. Run control wire through installed wire tie and tighten
wire tie to provide low voltage strain relief and to maintain
seperation of field-installed low and high voltage circuits.
Thermostat Designations
See unit wiring diagram for power supply connections.
If the indoor unit is not equipped with a blower relay, one must be field
supplied and installed.
Do not connect C (common) connection between indoor unit and
thermostat except when required by the indoor thermostat. Refer to
thermostat installation instructions. C (common) connection between
indoor unit and outdoor unit required for proper operation.
Figure 4
If the 4AC16LT unit is being installed with a new indoor coil
and line set, the refrigerant connections should be made as
outlined in this section. If an existing line set and/or indoor
coil will be used to complete the system, refer to this section
as well as the section that follows entitled - Flushing
Existing Line Set and Indoor Coil.
If this unit is being matched with an approved line set or
indoor coil which was previously charged with R-22
refrigerant, the line set and coil must be flushed prior to
installation. If the unit is being used with and existing indoor
coil which was equipped with a liquid line which served as a
metering device (RFCI), the liquid line must be replaced prior
to the installation of the 4AC16LT unit.
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (sweat connections) to the indoor coil
(flare or sweat connections).
Refrigerant Piping
Refrigerand can be harmful if inhaled. Refrigerant must
always be used and recovered responsibly. Incorrect or
irresponsible use of refrigerant can result in personal
injury or death.
WARNING