506762-01
Page 3 of 24
Issue 1143
If the 4SHP13 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 R22 refrigerant, the
line set and coil must be flushed prior to installation. If the
unit is being used with an 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 4SHP13 unit.
• Locate unit away from overhanging roof lines which would
allow water or ice to drop on, or in front of, coil or into
unit.
Slab Mounting
When installing a unit at grade level, install on level slab
high enough above grade so that water from higher ground
will not collect around the u nit (see Figure 2).
Roof Mounting
Install unit at a minimum of 6” above surface of the roof to
avoid ice buildup around the unit. Locate the unit above a
loard bearing wall or area of the roof that can adequately
support the unit. Consult local codes for rooftop applications.
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.
Unit must be grounded in accordance with national and
local codes. Failure to ground unit properly can result in
personal injury or death.
WARNING
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
wiring diagram in 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 on page 4).
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
separation of filed-installed low and high voltage circuits.
Refrigerant Piping
Figure 2
Slab Mounting
Discharge Air
Mounting Slab
Ground Level
Building
Structure
Refrigerant 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
Line voltage is present at all components when unit is
not in operation on units with single pole contractors.
Disconnect all remote electric power supplies before
opening access panel. Unit may have multiple power
supplies. Failure to disconnect all power supplies could
result in personal injury or death.
WARNING
