Aprilaire model 800 Drain LINE, Automatic Digital Control and Control Wiring, Wiring Instructions

INSTALLATION INSTRUCTIONS (continued)

Drain LINE

Attach the 7/8” I..D.. drain tubing provided to the drain assembly at the bottom of the humidifier.. Secure with the hose clamp provided.. Do not over tighten..

Make sure the drain line has a constant downward slope from the humidifier to the drain and is not kinked or blocked..

Automatic Digital Control and Control Wiring

The control circuit operates on 24VAC..

The ADHC (Automatic Digital Humidifier Control) Model 62 must be mounted in the return air duct at least 6” upstream of any fresh air intake ducts or sources of moisture (steam dispersion tube if it is in the return..) Follow instructions provided with the control.. Connect “H” terminals on ADHC to “HUMIDISTAT” terminals on humidifier circuit board..

If protection from over-humidification is desired, install optional high humidity limit switch #4594 at least 4 feet downstream of the dispersion tube.. If airflow verification is desired, install optional airflow proving switch #4592 in duct.. The high humidity limit switch and the airflow proving switch are wired in series with the ADHC (humidistat) circuit..

Electrical Power Wiring & SHUT-OFF SWITCH

CAUTION

Only qualified electrical personnel should perform field wiring procedures. Improper wiring or contact with energized circuits can cause property damage or severe personal injury.

All wiring must be installed in accordance with all governing electrical codes and with the wiring diagram provided inside the front panel.. Power wiring must be rated for 105°C (220°F)..

Do not loop power wiring.. Do not use aluminum wire..

A safety grounding system that meets all governing electrical codes is required.. The ground connection must be made with solid metal to metal connections.. Ground wire must be the same size as the power wiring..

Humidifier draws 11..5 amps ±10%.. Use12..7 amps when sizing circuit..

The Model 800 Steam Humidifier can operate with 120, 208 or 240 VAC.. If using 208V or 240V, remove jumper between N and L2 terminals on power terminal block.

When wiring to 208 or 240 V, run two conductors plus neutral plus ground..

Wiring Instructions

Install disconnect switch (not provided) between line power source and humidifier..

Knock-outs for power wiring and low voltage control circuit wiring are located on the top of the humidifier..

Connect power and ground wiring as shown in wiring diagram, Figure 6..

Do not run high voltage power lines over internal circuit boards..

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