Carrier Idrofan 42NL User manual
Translation of the original document
DUCTED FAN COIL UNITS
42NL & 42NH
INSTALLATION, OPERATING AND
MAINTENANCE INSTRUCTIONS
CONTENTS
1 - PRECAUTIONS ...............................................................................................................................................11
1.1 - Operating limits ........................................................................................................................................... 11
1.2 - Clearances required.................................................................................................................................... 11
1.3 - Receiving a shipment - installation methods............................................................................................... 11
1.4 - Supply voltage.............................................................................................................................................12
2 - SAFETY CONSIDERATIONS ..........................................................................................................................13
2.1 - General........................................................................................................................................................13
2.2 - Protection against electrocution ..................................................................................................................13
2.3 - General installation conditions ....................................................................................................................13
2.4 - Caution for the control of the unit ................................................................................................................14
2.5 - Regulations .................................................................................................................................................14
3 - INSTALLATION OF THE UNIT ........................................................................................................................15
3.1 - Installing the unit in the false ceiling............................................................................................................15
3.2 - Installation procedure..................................................................................................................................15
3.3 - Removal procedure.....................................................................................................................................16
3.4 - Safety considerations relating to nal shut-down........................................................................................16
4 - COMPONENTS AND MAINTENANCE ...........................................................................................................17
4.1 - Fan motor assembly....................................................................................................................................17
4.2 - Drain pan removal ......................................................................................................................................18
4.3 - Water coil ....................................................................................................................................................18
4.4 - Duct connection spigots ..............................................................................................................................18
4.5 - Duct connection rectangular anges...........................................................................................................18
4.6 - Optional lter and lter access ....................................................................................................................19
4.7 - Fresh air controller ......................................................................................................................................19
4.8 - Optional water ow control valves...............................................................................................................19
4.9 - Flexible pipe option .....................................................................................................................................21
4.10 - Optional electric heater .............................................................................................................................22
4.11 - Optional water sensor................................................................................................................................22
4.12 - Optional condensate pump .......................................................................................................................22
3
A B C
42NH/L - size 2 744 300 50
42NH/L - size 3 914 300 50
42NH/L - size 4 1114 300 50
42NH/L - size 5 1314 300 50
42NH/L - size 6 1314 345 50
42NH/L - size 7 1614 345 50
B
C
A
B
A B
42NH/L - size 2 744 300
42NH/L - size 3 914 300
42NH/L - size 4 1114 300
42NH/L - size 5 1314 300
42NH/L - size 6 1314 345
42NH/L - size 7 1614 345
C
A
B
4
A B
42NH/L - size 2 744 300
42NH/L - size 3 914 300
42NH/L - size 4 1114 300
42NH/L - size 5 1314 300
42NH/L - size 6 1314 345
42NH/L - size 7 1614 345
D
A
B
EFG
H I
0.5%
5
±0.5% ±0.5%
+
9a 9b
L
11a
11a
K
10a
10b
M
12b
12a
N
13a 13a
6
O
Ø16
26
Ø16
4w-v
2w-v
2w-v + B
40
40
40
B
B
B
G
G
G
C
C
C
C
C
H
D
I
E
J
F
F
F
F
K
7
R
BAS
60 50
75
100
70
80
90
DOWN
17a
17b
17c
Q
16a 16b 16c 16d
P
15a
15b
15d
15c
15e
8
S
18a
9
Figure titles and legends:
1 Clearance in mm without rectangular ange inlet
2 Clearance in mm with rectangular ange inlet
3 Clearance in mm with small or large plenum
4 Electrical danger pictogram
5 Caution hand hazard pictogram
6 General danger pictogram
7 Lifting unit for installation in a false ceiling
8/9 Levelling the unit
10 Condensate drain pipe
10a 20 mm/m fall in horizontal pipe run
10b 50 mm siphon
11 Several units connected to one condensate collector
11a 20 mm/m fall
12 Fan assembly removal
12a Removing fan access panel
12b Position of torx screws
13 Electric heater removal
13a Location of screw
14 Coil inlet/outlet positions, all sizes
1 Cooling water outlet (4 and 2-pipe coil)
2 Cooling water inlet (4 and 2-pipe coil)
3 Heating water outlet (4-pipe coil)
4 Heating water inlet (4-pipe coil)
5 Air vent
6 Water drain
7 Water outlet of 4w-v
8 Water inlet of 4w-v
9 Water outlet of 2w-v
10 Water outlet of 2w-v + B
2w-v Two-way valve
2w-v+B Two-way valve and balancing function
4w-v Four-way valve (= Three-way valve with integral by-pass)
Connections for two-way valve with balancing function :
- Size 2 and 3 : 3/4’’ diameter
- Size 4 and 5 : 1’’ diameter
Connections for other valves and coils:
- Size 2, 3, 4 and 5 : 1/2’’ diameter
- Size 6 and 7 : 3/4’’ diameter
15 Meaning of wires - proportional valve actuator (not applicable for valves
with balancing functions)
15a Black wire (230 V valve actuator), actuator rod rising
15b Green wire (24 V valve actuator), actuator rod rising
15c Brown wire, Actuator rod lowering
15d Actuator rod in high position
15e Actuator rod in low position
16 Waterow adjustment of optional 2-way valve with balancing function
16a Control knob removal
16b Knurled nut untightening
16c Waterow adjustment (white knob)
16d Knurled nut tightening in initial position
17 Optional airow controller
17a Air Damper
17b Fresh airow setting (in m3/h)
17c Airow adjustment screw
18 Coil protective caps removal
18a Protective caps (factory tted)
10
This manual suits for next models
1
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