Lennox CWC 020 2P, Application Manual

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9
ELECTRIC HEATER (only for CWC 020-030-040-070-090 2P). TECHNICAL DATA
POWER
230 V 1Ph -50Hz
230 V / 400 V 3Ph-50Hz
1.5 kW CWC 020 2P
2 kW CWC 030-040 2P
2.5 kW / 4 kW CWC 070-090 2P
VOLTAGE
230 V 1Ph -50Hz
600x600 600x1200
FIG. 5
Duct connection Ø75 mm (*)
Duct Ø125mm
Air inlet grille and filter
Air intake
Fan (*)
Reduction
125-75mm (*)
Duct connection Ø75 mm (*)
Duct Ø125mm
Air inlet grille
and filter
Air intake
Fan (*)
Reduction
125-75mm (*)
Conic tapping
150x125 (*)
Duct Ø150mm
600x600 600x1200
FIG. 6
Duct connection
Ø150mm flange
and clip (*)
Insulated flexible
duct Ø150
Grille
Duct connection Ø150mm
flange and clip (*)
Insulated flexible
duct Ø150
Grille
OPTIONS
• 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.
AIR SUPPLY TO AN ADJACENT ROOM (FIG. 6)
FRESH AIR MAKE UP (FIG. 5)
INSTALLATION
INSTALLATION
• Remove the 68 mm insulation material and cut out the prepunched side knockouts.
• Secure the duct connection flange to the unit. Conducts can be of flexible polyester type or corrugate aluminium,
externally covered with anticorrosion 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.
• Remove the 150 mm insulation material and cut out the prepunched side knockouts. For models 600x600, the
two prepunched side knockouts must not be used at the same time to provide conditioned air to an adjacent
room. For models 600x1200, 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.
• Conducts can be of flexible polyester type or corrugate aluminium, externally covered with anticorrosion 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
3
/h, fresh air fan at high speed:
Air flow
UNIT/MODELS
Available
pressure
Pa
m
3
/h
CWC 090 2P
CWC 090 4P
CWC 020-030 2P
CWC 020-030 4P
175 100 25
0 8 15
CWC 040 2P
CWC 040 4P
200 100 25
0 10 20
CWC 070 2P
CWC 070 4P
400 200 50
0 10 20
500 250 50
0 20 30
CWC 050 2P
CWC 050 4P
250 125 25
0 20 30
(*) Elements included in optional kit