DriSteem VAPORMIST Specifications download pdf (Page 18)

VAPORMIST INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Fused

disconnect

(provided by

installer)

Power

supply

(provided

by installer)

OM-1007

Notes:

• Control wiring and power wiring must be

run in dedicated or separate earthed metal

conduit, cable trays, or trunking.

• Separate the line voltage wiring from low

voltage control circuit wiring when routing

electrical wiring inside the humidiﬁer

cabinet.

• Do not use chassis or safety grounds as

current-carrying commons. Never use a

safety ground as a conductor or neutral to

return circuit current.

INSTALLATION

HUMIDIFIER FIELD WIRING

All wiring must be in accordance with all governing codes, and with the

humidiﬁer wiring diagrams. The diagrams are located inside the removable

subpanel cover on the right side of the humidiﬁer cabinet. Power supply wiring

must be rated for 220 °F (105 °C).

When selecting a location for installing the humidiﬁer, avoid areas close to

sources of electromagnetic emissions such as power distribution transformers.

The ﬁll valve, drain valve, probes, and temperature sensors use Class 2, 24

VAC power.

The use of semiconductor fusing sized per the National Electric Code is

recommended with the SSR option.

GROUNDING REQUIREMENTS

The approved earth ground must be made with solid metal-to-metal connections

and must be a good conductor of radio frequency interference (RFI) to earth

(multistranded conductors).

Ground wire should be the same AWG (mm2) size as the power wiring or

sized per NEC requirements (in Europe, IEC 60364 requirements).

PROPER WIRING TO PREVENT ELECTRICAL NOISE

Electrical noise can produce undesirable effects on electronic control circuits,

which affects controllability. Electrical noise is generated by electrical

equipment such as inductive loads, electric motors, solenoid coils, welding

machinery, or ﬂuorescent light circuits. The electrical noise or interference

generated from these sources (and the effect on controllers) is difﬁcult to deﬁne,

but the most common symptoms are erratic control or intermittent operational

problems.

Important:

• For maximum EMC (electromagnetic compatibility) effectiveness, wire all

humidity, high limit, and airﬂow controls using multicolored shielded/

screened plenum-rated cable with a drain wire for the shield/screen.

Connect the drain wire to the shield/screen ground terminal with wire less

than 2" (50 mm) in length.

• Do not ground shield at the device end.

mc_061610_0625-NA

Wiring

WARNING

Electric shock hazard

Only qualiﬁed electrical personnel

should perform ﬁeld wiring installation

procedures. Improper wiring or contact

with energized circuits can cause

property damage, severe personal

injury, or death as a result of electric

shock and/or ﬁre.

Do not remove the humidiﬁer electrical

panel cover or the heater terminal cover

until electrical power is disconnected.

Contact with energized circuits can

cause property damage, severe

personal injury, or death as a result of

electrical shock.

mc_062310_0629

mc_062310_0630-VMHT

Vapormist

humidiﬁer

FIGURE 14-1: FIELD WIRING

REQUIREMENTS

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 55 56

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DriSteem VAPORMIST Specifications Page 18

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