4
Rigging
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
!
Keep the unit upright and lift unit using a sling. Use cardboard or
padding under the sling, and spreader bars to prevent sling damage
to the unit. See Fig. 3. See Fig. 2 for center of gravity reference.
Install the unit so that the coil does not face into prevailing winds.
If this is not possible and constant winds above 25 mph are
expected, use accessory wind baffle. See installation instructions
provided with the accessory kit.
NOTE
: Accessory wind baffles should be used on all units with
accessory low ambient temperature control.
Field--fabricated snow or ice stands may be used to raise unit when
operation will be required during winter months. Units may also be
wall mounted using the accessory wall mounting kit.
A07396
Fig. 3
---
Lifting Unit with Sling
Step 3
—
COMPLETE REFRIGERANT PIPING CONNEC-
TIONS
Outdoor units may be connected to indoor units using
field--supplied tubing of refrigerant grade and condition. See Table
1 for correct line sizes. Do not use less than 10 ft (3.05 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 (24.38 m) of interconnecting tubing and
more than 20 ft (6.10 m) of vertical lift is used, consult the
residential Long Line Application Guide for required accessories.
If either refrigerant tubing or indoor coil is exposed to the
atmosphere, the system must be evacuated following good
refrigeration practices.
Run refrigerant tubes as directly as possible, avoiding unnecessary
turns and bends. Suspend refrigerant tubes so they do not damage
insulation on vapor tube and do not transmit vibration to structure.
Also, when passing refrigerant tubes through a wall, seal the
opening so that vibration is not transmitted to structure. Leave
some slack in refrigerant tubes between structure and outdoor unit
to absorb vibration. Refer to separate indoor unit installation
instructions for additional information.
Expansion Device
A hard shutoff, thermostatic expansion valve (TXV) is required at
the indoor section of the system for proper operation of these
products. If the indoor section of the system is not equipped with a
hard shutoff TXV, refer to Spec Sheet for the correct TXV kit to be
installed. Follow the instructions in the kit for proper installation.
38H
D
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