Sears 2500 manual Cold air plenum mount no20, Wall mount Fig, On ColdAir Hot Air Plenum Minimum

installation

HUMIDISTAT

The humidistatis designedto _ount on the cold air plenum of your furnace or on an interiorwall of the home.The cold air ple- num, however is the preferredlocationfor sensingthe average humiditythroughoutyourhome. Select your location and follow the appropriateinstructions.

IFOROTE:COLDTHE AIRHUMIDISTATASPLENUMINSTALLATION(FIGSUPPLIEDISASSEMBLED.20).

cold air plenum mount (no20).

On ColdAir					Hot Air
					Plenum
Plenum	I			I _
6"		t
Minimum			Flow
		_,Air
		"" _	-- ""		Fumaca

Apply Gasket Here Around Opening

[] 1 Select a location that is a minimum of 6" upstream

on cold air plenum (Fig. 19). Peel off paper backing and posi- tion template supplied, drill four 1/8" diameter holes and cut out center portion along solid line. Peel off backing and apply gasket matedal as indicatedby dashedlines.

I CAUTION: DONOT install humidistat on hot air plenum. I

[] 2 Remove knob and cover from humidistat. To remove cover, place screwdriver blade in slotat side of humidistat and twist.

[] 3 Position humidistat in opening and fasten with four screws provided.

Knob

, Return Air

Plenum

Opening

DUCT MOUNT

[] 4 Installshaft extension.Installcover by snappingonto backplate. Press knob onto shaft extension.

5Connect wiring (Fig. 21)_ Plug 24 VAC transformer into 120 VAC outlet. Do not use existing transformer on furnace.

6Peel off backing and attach the operating instruc- tion label to the cold air plenum next to the humidistat.

wall mount (Fig. 22)

[] 1 Remove knob end cover from humidistat.To remove cover,placescrewdriverbladeinslotat sideof humidistatand twist.

2 Convert humidistat for wall mounting by removing

control unit from backplate. Reassemble control unit to backplate as illustrated in Pig. 22 with spacers to rear and shaft forward. Remove electrical disconnect by cutting the (2) wires. Strip ends 1/2" for splicing to wall wire.

I NOTE: Shaft extension is not required for wall mounting, I

3 Select a location on a convenient inside wall, usu- ally beside your furnace thermostat.

[] 4 Run low voltage wire through the wall, Exit hole must be within the lower backplate opening. (Purchase additional wire as required.)

Humid

Electdcal

Disconnect

Humidifiert

120 VAC Wall Outlet

[] 5 Connect low voltage wires from wall to previously cut leads on humidistat by stripping ends and using wire nuts (not provided). Position and fasten humidistat to wall with four screws provided. Install cover by snapping onto backplate.

Press knob onto humidistat shaft. Make sure 1/8" air space is maintained between wall and backplate to allow air circulation and humidity sensing.

6 Connect wiring (Fig. 21). Remove electrical discon- nect by cutting wires on harness, strip ends and splice to low voltage wire from wall humidistat using wire nuts. (Wire nuts not provided. Purchase them from your local Sears Hardware

Store.) Plug 24 VAC transformer into 120 VAC outlet. Do not use existing transformer on furnace.

I MediaNOTE:_Humidifierhumidifiesonlywilltum whenever humidistatcallswhen fumaco isforon,humidityhowever,. J

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