1.9.1)
Air conditioning
An air conditioning coil may be installed on the supply air side only.
Also, notwithstanding the evaporator coil manufacturer's instructions,
a minimum clearance of 15 cm (6") must be allowed between the
bottom of the coil drain pan, and the top of the heat exchanger. Wire
the thermostat and condensing unit contactor as indicated in the wiring
diagram in Figure 5, p. 21.
1.9.2)
Ductwork and Filter
Installation
Design and install the air distribution system to comply with Air
Conditioning Contractors of America manuals or other approved
methods that conform to local codes and good trade practices.
When ducting supplies air to a space other than where the furnace is
located, the return-air ducts must be sealed and also be directed to
the space other than where the furnace is located.
Install the air conditioning cooling coil (evaporator) downstream from
the supply air plenum of the furnace. If a separate evaporator and
blower unit is used, install appropriate sealing dampers for air flow
control. Cold air from the evaporator coil going through the furnace
could cause condensation and shorten furnace life.
CAUTION
Dampers (purchased locally) MUST be automatic.
WARNING
Poisonous carbon monoxide gas hazard.
Do NOT draw return air from inside a closet or
utility room. Return air duct MUST be sealed to
furnace casing.
Failure to properly seal ducts can result in death,
personal injury and/or property damage.
WARNING
Poisonous carbon monoxide gas hazard.
Install evaporator coil on the supply side of the
furnace ducting.
Evaporator coil installed in return side ducting can
cause condensation to form inside heat exchanger
resulting in heat exchanger failure. This could result
in death, personal injury and/or property damage.
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