12
PERSONAL INJURY AND/OR EQUIPMENT
DAMAGE HAZARD
Failure to follow this caution may result in personal injury
and/or equipment damage.
Be sure unit panels are securely in place prior to rigging.
CAUTION
!
1. Rig the unit. Keep the unit upright and lift using a sling.
Use cardboard or padding under the sling, and spreader bars
to prevent sling damage to the unit. See Fig. 23 for the
center of gravity reference.
2. Mount unit on a solid concrete pad or platform.
3. Isolate unit and piping from structure.
4. If a heat pump is being installed, use a field-- provided snow
stand or ice rack where prolonged subfreezing temperatures
or heavy snow occurs.
5. On cooling only units, an accessory stacking kit can be used
when units are to be stacked. See installation instructions
provided with accessory kit.
A07396
Fig. 23 – Lifting Unit with Sling
Mounting Unit on Wall
The units can also be mounted on the wall using the accessory
mounting kit.
COMPLETE OUTDOOR REFRIGERANT
CONNECTIONS
Follow the following general guidelines:
1. Use refrigerant grade field – supplied tubing. Refer to Table
11 for the correct line sizes.
2. Do not use less than 10 ft (93.05 m) of interconnecting
tubing.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
If any section of pipe is buried, there must be a 6 in. (152.4
mm) vertical rise to the valve connections on the outdoor
unit. If more than the recommended length is buried,
refrigerant may migrate to cooler, buried section during
extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start--up.
When more than 80 ft. (24.4 m) of interconnecting tubing is used,
consult the Residential Long Line Application Guide for required
accessories.
3. Insulate both lines. A minimum of 1/2 inch foam pipe
insulation is recommended.
4. Run the refrigerant tubes as directly as possible and avoid
unnecessary turns and bends.
5. Suspend refrigerant tubes to avoid damage to insulation or
tubes so they do not transmit vibration to the structure.
6. When passing refrigerant tubes through the wall, seal the
opening so rain and insects do not enter the structure. Leave
some slack in refrigerant tubes between structure and
outdoor unit to absorb vibration.
Connection at Outdoor Unit
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
To prevent damage to unit or service valves observe the
following:
S
A brazing shield
MUST
be used.
S
Wrap service valves with wet cloth or use a heat sink
material.
24AHA4/124ANS Units:
1. Assemble the connector tube to the factory supplied filter
drier by:
S
Braze the field supplied connector to the inlet of the filter
drier (see Fig. 24).
A09536
Fig. 24 – Cooling Only Connector Tube Assembly
2. Braze the completed filter drier assembly to the liquid
service valve.
3. Connect the field supplied line set to the filter drier
assembly and the suction valve. A sweat connection is
required at the suction valve and flare connection is required
for the mixed phase line.
4. Insulate any exposed areas between the line set and the
liquid valve.
25HHA4/224ANS Units
1. Assemble the connector tubes to the factory supplied filter
drier by brazing the factory supplied flare connectors to the
inlet and outlet for the filter drier (see Fig. 25).
A09537
Fig. 25 – Heat Pump Connector Tube Assembly
