Aprilaire 1750A, 1770A Whole-Homeinstallation continued, Basement Ducting & Wiring, Wiring Notes

Whole-Home installation (continued)

BASEMENT DUCTING & WIRING

Figure 9 – Whole-Home Basement Installation

DEHUMIDIFIED AIR IS SUPPLIED

DOWNSTREAM FROM A-COIL TOA-COIL

MINIMIZE EVAPORATION OFF A-COIL

SUPPLY DUCT

RETURN

DUCT

HVAC / FURNACE

Figure 10 – Whole-Home Basement Wiring
		DEHUMIDIFIER
		CONTROL BOARD
		VENT
		DAMPERS
		DEH
THERMOSTAT	HVAC EQUIPMENT
R	R	Rf
C	C	Cf
		Gs HVAC
G
		EQUIP
	G	Gh
W	W	W

115VAC CIRCUIT

FLOOR DRAIN

AIR IS PULLED FROM

RETURN DUCT

DEHUMIDIFIER

CONDENSATE HOSE

(TO COMMON DRAIN OR OUTSIDE)

Y	Y	DH
		FLOAT
		SWITCH
		ODT
		SENSOROT
		A
		B
		REM
		+
		-

90-1536

90-1537

ATTIC DUCTING & WIRING

Figure 11 – Whole-Home Attic Installation

Figure 12 – Whole-Home Attic Wiring

		MAIN SUPPLY DUCT
DEHUMIDIFIER		HVAC EVAPORATOR COIL
DEHUMIDIFIED AIR IS		HVAC / FURNACE
SUPPLIED DOWNSTREAM
FROM EVAPORATOR COIL TO
MINIMIZE EVAPORATION		MAIN
115 VAC CIRCUIT
		RETURN
		DUCT
AIR FILTER
ACCESS
DOOR
		CONDENSATE HOSE
		(TO COMMON DRAIN
OPTIONAL		OR OUTSIDE)
EXTERNAL		CONDENSATE PAN
CONTROL
LOCATED IN	PRINCIPAL	WITH FLOAT SWITCH
LIVING SPACE
	LIVING
	SPACE

THERMOSTAT

R

C

G

W

Y

DEHUMIDIFIER

CONTROL BOARD

VENT DEH

DAMPERS

HVAC EQUIPMENT

	R		Rf
			Cf
	C		HVAC
			EQUIP
			Gs
	G		Gh
	W		W
	Y		DH
			SWITCH
			FLOAT
LOW VOLTAGE			SENSOROT
NORMALLY CLOSED			ODT
FLOAT SWITCH
			A
			REM
			B
		+

	90-1536
Attic Installation Note:	Wiring Notes:

-

90-1537

The dehumidifier must be installed in a secondary condensate pan with a float switch..

•If wiring to a Model 70 Living Space Control, see MODEL 70 LIVING SPACE CONTROL section on page 16..

•If wiring to a third-party control, see THIRD-PARTY CONTROL section on page 17.

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