Connection Best Practice; Wiring Best Practices - Elsteam EHPN Series Operating And Maintenance Manual

6.4 Connection best practice

6.4.1 Wiring best practices

RISK OF ELECTRIC SHOCK AND FIRE
• Do not install the equipment while the power supply is connected.
• Cutoffthepowersupplytoallequipment,includinganyconnecteddevices,beforeinstalling/uninstallingcablesorwires.
• Do not use the device with loads greater than those indicated in the technical data section.
• Do not exceed the temperature and humidity ranges indicated in the technical data section.
• Providesafetyinterlocks(isolators)ofasuitablesizebetweenthepowersupplyandthehumidifier,withacontactopening
distance of at least 3 mm for each pole.
• Only use cables with a suitable cross-section as indicated in the section "Wiring best practices".
When wiring the humidifiers,observethefollowinginstructions:
• Makesuretheoperatingenvironmentandconditionsfallwithinthespecifiedvalues.
• Usecableswiththecorrectdiameter,suitedtothevoltageandcurrentrequirements.
• Use double-insulated cablessuitableforoutdooruse(minimumrequirement:H05RN-F)whichalsoincludeanearthwire.
LOOSE WIRING CAUSES ELECTRIC SHOCKS AND OVERHEATING
Tighten the connections in compliance with the technical specifications relating to tightening torques.
MALFUNCTIONING OF THE EQUIPMENT
• Performthewiringcarefully,incompliancewithelectromagneticcompatibilityandsafetyrequirements.
• Carry out a full start-up test.
• Makesurethewiringiscorrectfortheendapplication.
• Minimisethelengthoftheconnectionsasmuchaspossible,toavoidwindingthecablesaroundelectricallyconnectedparts.
• Beforeapplyingthepowersupply,checkallthewiringconnections.
• Donotconnectcablestounusedterminalsand/orterminalsmarkedwiththetext"Noconnection"(N.C.).
REGULATORY INCOMPATIBILITY
Makesurealltheequipmentusedandsystemsdesignedconformtocurrentlocal,regionalandnationalstandards.
Suitable wiring for power supply (at the fuse holder)
Step 17.8 mm (0.70 in.)
7
mm
0.28
in.
mm 2
4 4
AWG 10 10
no. of conductors
2
Suitable wiring for the power cables
Step 5.08 mm (0.199 in.)
7
mm
0.28
in.
mm
2 0.2...2.5 0.2...2.5
AWG 24...14 24...14
Suitable wiring for I/O SELV
Step 3.5 mm (0.137 in.)
7
mm
0.28
in.
mm
2
0.14...1.5 0.14...1.5
AWG 25...15 25...15
924EHPNE4.01 - EHPN series humidifiers
Ø 3.5 mm (0.14 in.)
4
10
Fig. 25. Suitable wiring for power supply (at the fuse holder)
0.25...2.5 0.25...2.5 2 x 0.2...1 2 x 0.2...1.5
22...14 22...14 2 x 24...18 2 x 24...16
Fig. 26. Suitable wiring for the power cables
0.25...1.5 0.25...0.5 2 x 0.08...0.5
22...15 22...20 2 x 28...20
Fig. 27. Suitable wiring for I/O SELV
DANGER
DANGER
WARNING
WARNING
2,5
N•m
C
lb-in 22.12
2 x 0.25...1 2 x 0.5...1.5
2 x 22...18 2 x 20...16
2 x 0.5...0.5
2 x 0.08...0.5 2 x 0.25...0.34
2 x 20...20
2 x 28...20 2 x 23...21
| 42 | Electrical connections |
N•m
C
Ø 3.5 mm (0.14 in.)
lb-in
C
Ø 3.5 mm (0.14 in.)
0.5...0.6
4.42...5.31
0.5...0.6
N•m
lb-in 4.42...5.31
02/2024