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 Waterow adjustment of optional 2-way valve with balancing function
16a Control knob removal
16b Knurled nut untightening
16c Waterow adjustment (white knob)
16d Knurled nut tightening in initial position
17 Optional airow controller
17a Air Damper
17b Fresh airow setting (in m3/h)
17c Airow adjustment screw
18 Coil protective caps removal
18a Protective caps (factory tted)
10