Carrier Atmosphera 42EM series - Flexible Pipe Option; Optional Electric Heater; Codification

14
W
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Minimum bending radius:
• non-insulated pipes 72 mm
• insulated pipes 106 mm.

WARNING: Disconnect the power supply before carrying
out any work on the unit.
If the electric heater develops a fault, it must be replaced;
this requires the removal of the fan motor assembly: Fig. 17
(17a = screw).
CAUTION: Do not touch the live metal heater elements
when the electric heater is connected to the power supply.
Electric heater replacement procedure:
• Remove the filter.
• Remove the fan motor assembly access panel.
• Identify and note the fan speeds wired to the auto-
transformer terminal block. Disconnect the power
supply cable.
• Remove the fan motor assembly.
NOTE: Be careful not to touch the fan blades during
the removal process to avoid unbalancing the fans.
• Disconnect the electric heater power supply cables
and remove them through the cable conduit.
• Unscrew the defective heater(s) and replace it (them).
• Replacement of the fan motor assembly is by the
reversal of the above procedure.


A G3 rear access
B G3 access from below
- None
RIGHT
A 125 mm ø fresh air spigot only
B 8.3 l/s (30 m
3
/h)
C 16.6-44.4 l/s (21/28/36) 60-160 m
3
/h
(75/100/130)
E Motorised fresh air valve adapter ø
125 mm
J 125 mm ø fresh air spigot only
LEFT
K 8.3 l/s (30 m
3
/h)
L 16.6-44.4 l/s (21/28/36) 60-160 m
3
/h
(75/100/130)
N Motorised fresh air valve adapter ø
125 mm
0 None
A 230 V on/o
- None
A NTC
B HDB
D NTC + IAQ board
E Terminal block with plastic cover
F E + relay
G E + relay + fuse holder
K NTC + fuse holder
L NTC + IAQ board + fuse holder
M HDB + fuse holder
R E + fuse holder
B Modular unit with 2 supply air spigots
C Modular unit with 3 supply air spigots
G Modular unit with 1 supply air spigot at the end (in-line conguration)
H Modular unit with 1 supply air spigot at the side (opposite coil)
J Modular unit with 4 supply air spigots
K Modular unit with 5 supply air spigots
M Return air plenum 1 spigot and modular unit 1 supply air spigot (in-line conguration)
N Return air plenum 1 spigot and modular unit 1 supply air spigot (U-shape conguration)
P Return air plenum 2 spigots and modular unit 2 supply air spigots
Q Return air plenum 3 spigots and modular unit 3 supply air spigots
R Return air plenum 4 spigots and modular unit 4 supply air spigots
S Return air plenum 5 spigots and modular unit 5 supply air spigots
T Compact unit with 1 return air spigot and 1 supply air spigot
U Compact unit with 2 return air spigots and 2 supply air spigots
V Compact unit with 3 return air spigots and 3 supply air spigots
NOTE: Terminal 1 = highest speed, Terminal 6 = lowest speed.
Fan set
Codication (last digit)
or option 600
Red wire
Grey wire
Black wire
Wire marked L
Six wired
speeds
Terminal marking (standard wiring), option 600 not selected
and option 570 = NTC or HDB
- None
A Return air sensor
B Supply air sensor
C Change-over sensor
D A + B
E A + B + C
F A + C
G B + C
A 2 pipes right
B 2 pipes left
C 4 pipes right
D 4 pipes left
E 2 pipes/2 wires, right, low pressure
F 2 pipes/2 wires left, low pressure
G 2 pipes/2 wires, right, high pressure
H 2 pipes/2 wires left, high pressure
0 5
1 0
2 1
2 2
2 3
3 1
3 2
3 3
- None
C 2-way valve
D 4-way valve
J 2-way valve + exible piping
K 4-way valve + exible piping
Product type Size
Modication code Coils Supply and return air plenum Valves Valve motors Control Sensors Filter and access Fresh air Motor wiring
Product reference
4 2 E M N N C A A A A A A A A A
Digit
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
{
Variable-speed
LEC motor