Carrier HUMCCLFP1025-A specifications Installation of Humidistat, ÐWall Mounting Low Voltage

compression fittings. Plastic compression nut supplied with float valve should not be torqued greater than 25 in.-lb. For copper tubing installations: copper tubing may be connected to float valve by using a field-supplied 1/4 to 1/4 in. straight- through compression union. Run copper tubing to 1 side of compression union and use a standard compression sleeve. Tighten compression nut to torque recommended by manu- facturer. Attach approximately 6 in. of polyethylene supply tubing (supplied) between compression union and float valve. Prepare polyethylene tubing on both ends with brass inserts to prevent tubing collapse. Use compression nut at union to manufacturer's recommended torque, tighten plastic nut on float valve to maximum of 25 in.-lb.

3. Open valve and check installation for leaks.

NOTE: Valve is self piercing on copper lines; 1/4-in. hole must be drilled in steel or iron pipes. Use only a grounded drill or a hand drill to avoid shock hazard. Turn off water and drain the pipe prior to drilling 1/4-in. hole.

Step 8ÐInstall Humidistat and Complete Wiring

1.Mount humidistat on inside wall or return-air duct in accor- dance with section INSTALLATION OF HUMIDISTAT on page 10.

NOTE: Wiring must comply with national electrical code and any local codes or ordinances that may apply. (See Fig. 17.)

HUMIDISTAT

MOTOR	24VAC
	FURNACE

	TRANSFORMER
HUMIDISTAT	(10-VA)
MOTOR		115V
	24V	FIELD
		WIRING

A96014

Fig.17ÐHumidistat Installation for

HUMCCWTR2019-A--

Step 9ÐStart-Up

1.Open saddle valve to permit water to flow to the solenoid valve.

2.Check all connections for water leaks.

3.Set thermostat to call for heat. Set humidistat at highest humidity setting to be sure the contacts are closed. After a few minutes of operation, check the drain connection for leaks and to see if water is flowing through humidifier.

4.Reverse thermostat and humidistat settings to insure proper shutdown.

5.Reset thermostat to normal setting. Reset humidistat to rec- ommended setting.

Step 10ÐFinal Steps

Attach humidifier maintenance instruction sticker to a visible location.

1.Inform homeowner of proper operation, maintenance, and humidistat setting.

a.If unit is installed during cooling season, close bypass damper, set humidistat for summer setting (OFF or lowest setting).

b. If installed during heating season, set unit for normal operation.

INSTALLATION OF HUMIDISTAT

The humidistat provides automatic control of humidifiers in central heating systems. It is designed for low voltage, wall, or surface duct mounting and contains a SPST snap-acting dustproof switch.

Disconnect power supply before making wiring connections to prevent possible electrical shock and equipment damage. Make wiring connections in accordance with Installation Instruction supplied with the humidifier.

1.Installer must be a trained, experienced service person.

2.Disconnect power supply before beginning installation.

3.Conduct a thorough checkout before leaving installation.

Step 1ÐWall Mounting (Low Voltage)

1.Choose a location for humidistat about 5 ft above floor on inside wall with average room temperature and relative humidity conditions. Maximum ambient temperature of se- lected location must not exceed 125°F. Humidistat may be mounted directly on wall.

2.Drill a small hole in wall and run low-voltage wiring to location chosen. Pull about 6 in. of wire through hole. Plug opening to prevent drafts from affecting humidistat operation.

3.Remove knob, faceplate, and switch assembly from case by following steps listed below.

a.Remove knob by pulling away from casing. (See Fig. 18.)

b.Lift off faceplate, starting at right side. Left end of faceplate protrudes under lip of casing. (See Fig. 18.)

c.Remove switch by removing 2 screws in back of casing. Pressing tab on case. Lift out control. (See Fig. 19.)

MOUNTING HOLES

KNOB

CASE

FACEPLATE

A97102

Fig. 18ÐKnob and Faceplate Removal

4.Make connections to screw terminals on switch assembly. Re-install switch into casing Ð secure with 2 short screws.

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