Whole Home Central Air Humidifier

BEFORE YOU START - GENERAL SAFETY AND INSTALLATION PRECAUTIONS

Please read and  understand these instructions fully before you begin this installation and save them for future reference.
The manufacturer and e-humidifiers.com will assume no responsibility and the warranty will be void if the user does not adhere to the following precautions

Required tooling
Tin snips, 3/32" drill, pliers, screwdrivers, electric drill, hammer, center punch. IMPORTANT NOTE : This humidifier is supplied with RECEX ® screws that allows the use of either a Robertson or Phillips head screwdriver.

Preparing the humidifier

This humidifier is factory assembled with the air inlet located at the left side, thus the motor will be installed on the right side. This is reversible, if necessary. However, if it is suitable as supplied, please go directly to Step 6 (Installing the humidifier).  If the plastic is cold, please allow it to warm-up before you proceed with this unfolding operation. If humidifier reversal is necessary, do the following (Fig. 12):

• Lift the front of the water pan to disengage it from the sides of the humidifier and slide it out of the unit.
• Remove the two screws (12.1) located at the top of the humidifier body.
• Open the two sides (12.2) of the humidifier.
• Bend the two sides in the opposite direction and finish with the top.
• Put the two screws (12.1) back in place, taking care to not strip the plastic material.

Installing the humidifier

(Please see Fig. 2, 3 and 4)

• Please refer to the general view of a typical installation.
• Shut off the furnace power.
• Kit No. 1 contains all the material you need to install the humidifier body.
• Choose the location of the template and make sure that a distance of approximately 14" between the furthest left vertical line of the humidifier opening and the center of the air takeoff collar can be obtained. (Fig.2). This 14" dimension is given for a typical installation, some installations may differ.
• Apply the humidifier template (#1) on the return duct, level it and then attach it to the duct.
• Starting from the vertical line of the opening (the one closest to the warm air duct), measure 14" and mark the center of the air takeoff opening.
  Warning:   Always check that you are not about to cut or drill into any air conditioning or electrical accessory during installation.
  
• Center punch the four screw holes and the four corner holes through the template and pierce 8 holes in the duct with a 3/32" drill.
• Remove the template. Join the four corner holes with a marker line. Make a starting hole and cut a rectangular opening that will correspond to the back opening of the humidifier (7-3/4" x 6-1/2").
• Install the humidifier in the opening and attach it with the four screws #8 x 3/4". The ribs around the humidifier back opening must fit into the rectangular opening in the duct. Check that the humidifier body is level from side to side and from back to front to make sure the drum will touch the water equally. Then fasten the humidifier to the duct.
• Fasten the motor (4.1) to the opposite side of the air intake. Kit No. 5 contains the motor (4.1) and two screws (4.2).

Installing the air takeoff collar (Fig. 2 and 10)
The plastic air takeoff collar is combined with an adjustable damper.

• Draw a 6" dia. circle on the point previously marked on the warm air duct.
  WARNING : Always check that you are not about to cut or drill into any air conditioning or electrical accessory during installation.
  
• Make a starting hole in the duct and cut the round opening for the air takeoff collar.
• Center the collar on the opening and rotate it so that the damper actuator will be accessible after you install the flexible duct. Then mark and drill the four fastening holes (3/32" dia).
• Fasten the air takeoff collar to the duct with four screws.

Installing the flexible duct

(General view Fig. 2)

• Measure the required flexible duct length necessary to connect the humidifier to the air takeoff collar (2.3), so it does not sag.  Keep in mind that the damper mobile plate needs a little space to rotate inside the flexible duct. Then cut the excess portion of the flexible duct.
• Slide the flexible duct (2.1) on the air takeoff collar (2.3) and secure it by inserting the plastic pins (2.2) through the vinyl in between two reinforcement wires.
• Repeat this operation at the humidifier side.

Installing the automatic valve (Fig. 4, 5 and 7)
Kit No. 2 contains all the material you need to install the automatic valve. The automatic valve can be installed only on the left side of the unit, the right side of the pan being occupied either by the overflow protection or the automatic draining system.

• Remove the oblong knockout on the left side to open a hole where the automatic valve will be installed.
• Install the valve (7.1) inside the casing and fasten it with the hexagonal plastic nut (7.4). The valve body is held in a vertical position by two ribs (4.4) of the humidifier body.
  

Take the float (7.3) and install it behind the valve lever (7.2) with the pivot pin (7.5) fitted in the round hole.From the front, insert the screw (7.6) in the kidney shaped opening through the valve lever (7.2) and the float arm (7.3) and screw it into the nut (5.1) installed in the hexagonal housing of the float arm. Partially tighten the screw (7.6)

Preparing the water pan (Fig. 11 & 15)
The water pan can be assembled in two different ways.  The hole already pierced in the front right corner of the pan can receive either an overflow kit or an automatic draining kit. Fig. 11 shows how to assemble the overflow tube into the water pan.

Your humidifier is a M-300, it is supplied with an overflow protection tube to be installed in the hole of the pan. Although it is strongly recommended using it, if you don't want to take advantage of the overflow feature or if you don't have a floor drain, leave the vinyl cap (11.6) factory installed on the spigot.
Fig. 11 shows how to assemble the overflow tube into the water pan.

• Install the overflow tube through the hole in the pan.
• Install the O-ring (11.5) around the screw part that sticks at the outside of the pan, then the plastic washer (11.4).
• Secure the overflow tube (11.7) to the water pan (11.1) with the plastic nut (11.8), without stripping.
• Then follow the instructions at section 11.
• Install the overflow tube through the hole in the pan.
• Install the O-ring (11.5) around the screw part that sticks at the outside of the pan, then the plastic washer (11.4).
• Secure the overflow tube (11.7) to the water pan (11.1) with the plastic nut (11.8), without stripping.

Installing the pan into the humidifier

• Slide the water pan into the humidifier, between the two plastic rails located at the sides of the unit.
• Slightly open the sides of the humidifier and insert the two side tabs of the water pan into the two rectangular holes (4.5) in the sides of the humidifier.
• Push the front of the water pan down to snap the two tabs in the sides of the humidifier.
• Remove the black vinyl cap (11.6) blocking the end of the spigot.
• Push one end of the drain hose (11.3) onto the spigot of the overflow tube (11.2). The other end MUST be connected to a floor drain, not any kind of bucket. Please install the tubing as vertical as possible and do not leave bends or loops where water could accumulate, thus allowing minerals to buildup in the tubing.
• The housing of the draining system is designed to protect against failure. Any overflow would be drained immediately.

Connecting the supply tubing to the humidifier (Fig. 7)

Please ensure that operations 12, 13 and 14 are completed in sequence. The plastic tubing MUST be kept away from hot surfaces (e.g. the warm air duct or the exhaust vent). Please measure carefully before cutting.

• Slip the plastic compression nut (7.9) onto the tubing and fit one of the brass inserts [(7.7) 1/2" long, supplied with the brass valve] into the end of the tubing. The compression nut contains its own and non-removable plastic ferrule.
• Push the tubing fully into the automatic valve, tighten the plastic compression nut (7.9) firmly by hand then add half a turn with a small wrench, without stripping. The compression nut will indent the plastic tubing and keep it firmly inside the valve.
• Although using the supplied plastic tubing is recommended, it is also possible to use copper tubing if this is already installed from a previous installation. Copper tubing does not need a brass insert. After having tightened the compression nut firmly by hand, just add three quarters of a turn with a small wrench.
• This valve is equipped with an integrated closing feature. On the top of the valve is a little pivoting lever (7.8). It allows keeping the automatic valve closed for a short period without having to close the supply valve installed on the copper pipe. In order to lock the automatic valve, lift the float (7.3) until the valve is firmly closed then turn the little arm located at the top of the valve in the middle position until it locks the valve arm in place. Since this operation compresses the seat and the rubber strongly, it is intended for maintenance periods only and is not to be used as a permanent closure.  For longer periods or in summer time, please use the supply valve instead.

Installing the supply valve on a copper pipe (Fig. 13)
A plastic bag contains a brass valve and all the material required to install the water supply valve. Water is taken from the nearest cold water pipe suitable for the supply valve installation. Shut off the main water valve.

CAUTION : Please make sure that the piercing needle is completely recessed into the valve body by turning the handle counter
clockwise.

• Assemble one side of the top clamp (13.1) to bottom clamp (13.2) with a screw (13.3) and a nut (13.4).
• Make sure that the rubber gasket (13.5) is in place over the piercing needle and position the valve assembly on the copper water line.
• Assemble the other side of the top clamp (13.1) to the bottom clamp (13.2) with the remaining screw and nut.
• Tighten the two screws so that the valve is firmly attached to the water pipe. The two sides of the clamp must be parallel.
• Turn the valve handle completely clockwise until it stops. This will pierce the copper pipe and close the valve.
• This saddle valve is designed to be fully open or closed. Do not use it to regulate the water flow.

Connecting the water supply tubing to the supply valve (Fig. 13)

• Slip the brass compression nut (13.9) onto the plastic tubing, then the nylon sleeve (13.7) with its most tapered end towards the end of tubing.
• Fit the second brass insert (13.8, 1/2" long, supplied with the brass valve) into the end of tubing.
• Push the tubing fully into the supply valve. Then tighten the brass compression nut with a small wrench.
• NOTE: The brass sleeve (13.6) supplied with the brass valve is to be used only if the plastic tubing is replaced by copper tubing (optional).

Installing the drum

The drum shaft has a flat end (14.6) that fits into the motor. The opposite end of the shaft snaps into position in the center of the air collar.

Adjusting the water level (Please see Fig. 7)

The water level is adjusted by altering the height of the float.
The optimal water level in the pan is at 3/4" from the top of the water pan.

• Open the main water valve then the supply valve installed on the water pipe.
• Loosen the screw (7.6) and adjust the float in such a way that it closes the automatic valve when the water level reaches 3/4" from the top of the water pan.
• Tighten the screw (7.6) when achieved.
• Wait until the automatic valve completely closes and check all fittings. If necessary, tighten the compression nuts a little more without stripping.

Installing the Humidistat and the transformer (Fig. 1, 2, 8 and 9)

This humidifier is supplied with a transformer that can be plugged in to any electric outlet. The Humidistat is a duct mounted type.  The RETURN duct mounting method allows a better "sensing" of all the air returned to the furnace without being disturbed by a sudden increase in moisture level (kitchen or bathroom), thus offering superior humidity control.  Kit No. 4 contains all the material you need to install the Humidistat.

• The Humidistat should be installed on a flat and vertical surface of the RETURN duct at 6 inches minimum upflow from the humidifier top (Fig. 2).
• Attach the Humidistat template (#2) on the duct.
  WARNING: Always check that you are not about to cut or drill into any air conditioning or electrical accessory during installation.
  
• Mark and drill the mounting holes and cut an opening for the Humidistat.
• Push the two quick connectors (9.5) on the Humidistat (9.3) terminals identified #2 (or COM) and #3 (or NO).
• Split the wire coming from the transformer (9.1) in two on a suitable distance to connect one end to one of the motor (9.2) wires and the other end to the Humidistat terminal identified #2 (or COM).
• Use the separate piece of wire (9.4) to connect the other wire of the motor to the second Humidistat terminal identified #3 (or NO).
• Run the control wires through an opening located at the bottom of the front panel of the Humidistat.
• Hold the wires while you install the Humidistat in the opening. Check that the metal of the duct neither touches the connections nor cuts the wire insulation. Then fasten the Humidistat to the duct. The Humidistat mechanism is exposed in the duct.
• Temporarily install the control knob (8.4) on the Humidistat. (Finalize after the humidifier startup).