VII. DUCTWORK
Ductwork should be fabricated by the installing contractor in accordance with local codes
and NFPA90A. Industry manuals may be used as a guide when sizing and designing the
duct system - contact Air Conditioning Contractors of America, 2800 Shirlington Road,
Suite 300, Arlington, VA 22206, http://www.acca.org.
The unit should be placed as close to the space to be air conditioned as possible allow-
ing clearance dimensions as indicated. Ducts should be run as directly as possible to
supply and return outlets. Use of non-flammable waterproof flexible connectors on both
supply and return connections at the unit to reduce noise transmission is recommended.
It is preferable to install the unit on the roof of the structure if the registers or diffusers
are located on the wall or in the ceiling. A slab installation could be considered when the
registers are low on a wall or in the floor.
On ductwork exposed to outside air conditions of temperature and humidity, use a mini-
mum of 2" of insulation and a vapor barrier. Distribution system in attic, furred space or
crawl space should be insulated with at least 2" of insulation with vapor barrier. One-half
to 1" thickness of insulation is usually sufficient for ductwork inside the air conditioned
space.
Balancing dampers should be provided for each branch duct in the supply system.
Ductwork should be properly supported from the structure.
When installing ductwork, consider the following items:
1. Noncombustible flexible connectors should be used between ductwork and unit to
reduce noise and vibration transmission into the ductwork.
2. When auxiliary heaters are installed, use noncombustible flexible connectors and
clearance to combustible material of 0" for the first 3 feet of discharge duct.
Clearance to unit top and side is 0".
!
WARNING
DO NOT, UNDER ANY CIRCUM-
STANCES, CONNECT RETURN
DUCTWORK TO ANY OTHER HEAT
PRODUCING DEVICE SUCH AS A
FIREPLACE INSERT, STOVE, ETC.
UNAUTHORIZED USE OF SUCH
DEVICES MAY RESULT IN FIRE,
CARBON MONOXIDE POISONING,
EXPLOSION, PROPERTY DAMAGE,
SEVERE PERSONAL INJURY OR
DEATH.
ILL I301
FIGURE 6
PACKAGE AIR CONDITIONER –
ROOFCURB INSTALLATION
9
Summary of Contents for RLNL-C 13 SEER Series
Page 5: ...5 FIGURE 1 UNIT DIMENSIONS BACK VIEW SIDE VIEW FRONT VIEW BOTTOM VIEW ...
Page 39: ...39 FIGURE 14 WIRING DIAGRAM ...
Page 41: ...3 5 TON AIR CONDITIONER 13 14 SEER 41 ...
Page 42: ...4 TON AIR CONDITIONER 13 14 SEER 42 ...
Page 43: ...5 TON AIR CONDITIONER 13 SEER 43 ...
Page 46: ...46 ...
Page 47: ...47 ...
Page 48: ...48 CM 0610 ...
