Air Distribution; Options - Lennox CWC 090-4P Installation, Operation & Maintenance Manual

OPTIONS

OPTIONAL ELECTRIC HEATER TECHNICAL DATA
MODELS
070-2P / 090-2P
• Side knockouts panel are provided. One to connect a fresh air inlet duct, and another to connect an air distribution
duct to deliver air to an adjacent room.
FRESH AIR MAKE UP
INSTALLATION
• Remove the 68 mm insulation material and cut out the
prepunched side knockouts.
• Secure the duct connection flange to the unit. Conduits
can be of flexible polyester type or corrugate aluminium,
externally covered with anti-condensate material.
• Install a supplementary fresh air fan for the introduction
of fresh air into the unit. The fan motor must be controlled
by an ON-OFF switch.
• Fresh air flow must be less than 10% of the total air flow,
to avoid operating problems. A speed controller should
be installed in the supplementary fan motor, for adjusting
the air flow.
AIR SUPPLY TO AN ADJACENT ROOM
INSTALLATION
• Remove the 150 mm insulation material and cut out the
prepunched side knockouts. Do not use the same fan to
provide air conditioned to both ducts.
• Cut away the polystyrene around the inside edge of the
opened panel, remove the polystyrene.
• Use a duct connection flange and a suitable duct.
• Air supply to an adjacent room requires that outlet
corresponding with the duct is closed.
• An air inlet grille must be fitted (if possible near the floor)
between the air conditioned room (where the unit is
situated) and the adjacent room.
• Conduits can be of flexible polyester type or corrugate
aluminium, externally covered with anti-condensate
material. The duct length can be calculated by taking
into account the pressure drop through the unit, using
the following table.
Air flow supplied to an adjacent room in m /h, fresh air fan at high speed.
UNIT/MODELS
Air flow
Available pressure
POWER
2,5 Kw / 4 Kw
3
CWC 070-2P / CWC 070-4P
3
m /h
400 200
Pa.
0
10
230 V 1Ph -50Hz
230 V / 400 V 3Ph -50Hz
Duct connection Ø75 mm(*)
Duct
Ø125mm
Duct
Ø150mm
(*)Elements included in optional kit
Duct connection Ø150mm
flange and clip (*)
CWC 090-2P / CWC 090-4P
50 500
20 0
16
Reduction
125-75mm(*)
Branch 150x125(*)
Fan (*)
Air inlet grille
and filter
Air intake
Insulated flexible
duct Ø150
250 50
20 30
Air inlet
grille