Aprilaire 1870, 1870W Installation Manual

Model 1870 & 1870W Dehumidifier

Installation Instructions

SAFETY INSTRUCTIONS

WARNING

1.120 Volts may cause serious injury from electric shock. Disconnect electrical power before starting installation or servicing. Leave power disconnected until installation/service is completed.

2.Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling duct work.

3.Dropping may cause personal injury or equipment damage. Handle with care and follow installation instructions.

CAUTION

1.Read all instructions before beginning installation.

2.Improper installation may cause property damage or injury. Installation, service, and maintenance must be performed by a qualified service technician.

3.Do not use in pool applications. Pool chemicals can damage the dehumidifier.

4.Do not use solvents or cleaners on or near the circuit board. Chemicals can damage circuit board components.

5.Wait 24 hours before running the unit if it was not shipped or stored in the upright position

6.Do not use dehumidification to prevent window condensation in the winter. To address window condensation, use ventilation to lower indoor humidity in the winter.

READ AND SAVE THESE INSTRUCTIONS

TABLE OF CONTENTS

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	. .	.	. .	.	.	. .	. .	. 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	. .	.	. .	.	.	. .	. .	. 3
Set Up Dehumidifier for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	.	. . . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	.	.	. .	.	.	. .3. . . . . . . . . . .
Duct Collars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	. .	.	. .	.	. .	. 4
Control Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	. .	.	. .	.	. .	. 5
1870W Hard Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	.	. .	.	.	. .	. 6. . . .
Electrical Specifications for Hard Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	. .	.	. .	.	. .	. 6
Wiring Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	.	.	.	. . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	.	.	.	.	. .	. 7. . . . . . . . . . .
Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	. .	.	. .	.	. .	. 8
Drain Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	. .	.	. .	.	. .	. 9
Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	.	. .	.	.	. .	. 9. . . . . . . . . .
Condensate Pan, Condensate Pump and Float Switch . . . . . . . . . . . . . . . . . . . . .	.	.	.	.	.	. . . . . . . . . . . . . . . . . . . .	.	.	.	.	.	.	. .	.	.	. 9. . . . . . . . . .
Ducting to HVAC System – Basement and Attic Installations . . . . . . . . . . . . . . . . . .	.	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	. .	.	. .	.	. .	10
Ducting for Stand Alone Installations or Non-Ducted Installations . . . . . . . . . . . . .	.	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	. .	. .	.	.	. .	11
Ducting for Two Zone Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. .	.	.	.	. . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	.	. .	.	. .	.	12. . . . . . .
Model 76 – External Control or Crawl Space/Sealed Attic Control and Wiring . .	.	.	. .	.	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	. .	. .	.	.	. .	13
Wiring the Dehumidifier to the HVAC System and Zone Dampers . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	. .	. .	.	.	. .	14
System Set Up and Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	.	.	. .	. . . . . . . . . . . . . . . . . .	. .	.	.		. .	.	.	.	.	15. . . . . . . . . . .
Installer Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	.	. .	. .	.	.	. .	17
Start Up and Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	18
Single Zone Whole House or Stand Alone Using the Dehumidifier Control . . . . . .	.	.	.	.	.	. . . . . . . . . . . . . . . . . .	.	.	.	.	.	.	.	.	.	18. . . . . . . . . .
Single Zone Whole House or Stand Alone Using Model 76 External Control . . . . . . . .	.	.	.	. .	.	. . . . . . . . . . . . . . . . . . . . . . .	.	.	.	. .	.	. .	.	.	.	.18. . . . .
Crawl Space (Remote) Control Using Model 76 . . . . . . . . . . . . . . . . . . . . .	.	.	.	.	.	. . . . . . . . . . . . . . . . .	.	.	.	.	.	.	.	.	.	.18. . . . . . . . .
Two Zone – Primary and Secondary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	18
Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	19
Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . .	. .	.	. .	.	.	. .	.	. .	.	19. .
Vent Auto & Vent-Timed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	20
Outdoor Temperature Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	20
Determine Ventilation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	21
Installer Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	22
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	. .	.	. .	.	. . . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	.	23
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	. .	.	.	. .	. . . . . . . . . . . . . . . . . . . . . . .	.	.	.	. .	.	. .	.	.	. .	24. . . . . . . . .
Table 4 – Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	.	.	.	. . . . . . . . . . . . . . . . . .	.	.	.	.	.	.	.	.	. . 24. . . . . . . . . .
Table 5 – Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	.	.	.	. . . . . . . . . . . . . . . . . . . .	.	.	.	.	.	. .		. .	.	26. . . . . . . . . . .
Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.	.	. .	.	. .	. . . . . . . . . . . . . . . . . . . . . . . . .	. .	.	.	. .	.	. .	.	.	. .	27

SPECIFICATIONS

		Model 1870 & 1870W

Weight		113 lbs..

Capacity		130 pints per day @ 310 CFM
AHAM DH-1-2008 80°F, 60% RH Conditions

Power		8..3A operating current
115 VAC, Single Phase, 60Hz

Dehumidifier Inlet Air Conditions	Dehumidification: 50°F – 104°F, 40°F dew point minimum
	Ventilation: 40°F – 140°F, 0%RH – 99%RH (non-condensing)

Filter		MERV 8, washable

Airflow	External Static Pressure ("w.c.)		Airflow (CFM)
	0..0		310

	0..2		270

	0..4		225

	0..6		175

0.7” w.c. is maximum design external static pressure.

The dehumidifier is not designed to prevent window condensation in winter.. Indoor humidity levels must typically get lower than what dehumidifiers can achieve to address window condensation.. Use ventilation to lower indoor humidity levels in winter..

SET UP DEHUMIDIFIER FOR INSTALLATION

IMPORTANT: Cut the strap securing the compressor shipping support bracket and remove the strap and shipping bracket.. See Figure 1..

FIGURE 1 – Remove Shipping Bracket

REMOVE SCREWS (2)

DISCARD SHIPPING BRACKET

REINSTALL SCREWS (2)

CLIP OFF PLASTIC STRAP

90-2013

SET UP DEHUMIDIFIER FOR INSTALLATION (CONTINUED)

DUCT COLLARS

STANDARD BASEMENT AND ATTIC INSTALLATIONS (FULLY DUCTED)

•Use the screws in the parts bag to attach the duct collars to the inlet and outlet of the dehumidifier.. The outlet collar has a backflow damper..

•The outlet duct collar may be attached to the top or end of the unit.. Move the outlet cover to the location not being used.. See

Figure 2..

•Make sure there are no bends in the ductwork coming off the outlet for a minimum of 4”.. This will ensure that the ductwork will not interfere with the backflow damper function..

SEALED ATTIC OR BASEMENT INSTALLATIONS

If dehumidifying the space in which the dehumidifier is installed, the duct collars do not need to be installed.. Leave the outlet cover on top of the unit.. See Figure 3..

FIGURE 2 – Fully Ducted Installations

	OUTLET COVER
	OUTLET DUCT
INLET	COLLAR W/BACK
INLET	DRAFT DAMPER
DUCT
COLLAR

		END DISCHARGE
		MOVE OUTLET
	INLET	COVER AND
	INLET	INSTALL DUCT
	DUCT	INSTALL DUCT
	DUCT	COLLAR TO
	COLLAR	COLLAR TO
	COLLAR	TOP DISCHARGE
		TOP DISCHARGE
		LOCATION

TOP DISCHARGE

90-2014

FIGURE 3 – Non-ducted Installations

OUTLET COVER

90-2016

SET UP DEHUMIDIFIER FOR INSTALLATION (CONTINUED)

CONTROL LOCATION

The on-board control can be located on the top of the dehumidifier or can be relocated to the front of the dehumidifier if the control can not be seen/accessed in the top orientation..

To move the control:

1.Remove the front control panel cover..

2.Remove the filter access door and filter..

3.Detach the on-board control by removing the four

(4) screws around the control.. NOTE: Use one hand to support the bottom of the on-board control when removing..

4.Keep the control in the unit and relocate to the front access hole..

5.Secure the control with the same four screws used to attach the control to the top of the unit..

6.Secure the control panel cover to the top of the unit..

	FIGURE 4 – Control Location
	CONTROL	CONTROL
	CONTROL	PANEL COVER
		PANEL COVER
	CONTROL	CONTROL
	CONTROL
	PANEL COVER
		FILTER ACCESS DOOR
		90-2017

1870W HARD WIRING

WARNING

ELECTRICAL SHOCK HAZARD: 115-volts may cause serious injury or death from electrical shock. Disconnect and tag electrical service before starting installation or field-service. Leave electrical service disconnected until installation or field-service is complete.

ELECTRICAL SHOCK HAZARD: An interrupted or broken ground may cause property damage, serious injury or death should an electrical fault occur. The cabinet must be grounded in accordance with NEC ANSI/NFPA 70-2011 or local codes. In Canada, refer to Canadian Electrical Code CSA C22.1.

FIRE HAZARD: Use of improper wire may cause serious injury, property damage or death due to fire. Do not use aluminum wire for electrical service to the dehumidifier. Use only copper wire.

CAUTION

Use of an undersized circuit breaker may cause property damage and/or the need for mold remediation service. See Specifications for wire and circuit breaker sizing.

The Model 1870W dehumidifier must be hard wired.. An electrical disconnect switch can be installed as needed to comply with appropriate codes or ordinances.. The ON/OFF switch on the dehumidifier interrupts the 115VAC service to the internal components of the dehumidifier, but does not disconnect the power supply at the 115VAC terminals on the dehumidifier..

United States Installations: Make all electrical connections in accordance with the current edition of the NEC ANSI/NFPA 70 and any local codes or ordinances that may apply..

Canada Installations: Make all electrical connections in accordance with the current edition of the Canadian Electrical Code CSA C22..1 and any local codes or ordinances that may apply..

ELECTRICAL SPECIFICATIONS FOR HARD WIRING MODEL 1870W

	Model 1870W

Voltage	110-120 VAC, 60 Hz, 1 phase

Minimum Circuit Capacity	12A

Maximum Fuse or Circuit Breaker Amps	20A

Minimum Wire Size AWG	14

Aprilaire 1870, 1870W Installation Manual

1870W HARD WIRING (CONTINUED)

WIRING INSTRUCTIONS

1.Disconnect electrical service at the main fuse or circuit breaker box..

2.Install any code required electrical disconnects to the line service..

3.Remove the side panel and electrical service panel from the dehumidifier.. See Figure 5..

4.Route the service cable through the 7/8” diameter hole where the power cord was removed.. USE ONLY COPPER SUPPLY WIRES..

5.Secure the cable/conduit to the dehumidifier using fittings/ connectors approved for the type of cable/conduit used..

6.Connect the ground wire of the service cable to the ground lug in the electrical service box.. See Figure 6..

7.Connect the line voltage wires of the service cable to the LINE BLK and NTRL WHT terminals.. See Figure 6..

8.Reattach the electrical service panel and side panel..

9.Restore electrical service at the main fuse or circuit breaker box..

FIGURE 5 – Electrical Service Box Location

SIDE PANEL

ELECTRICAL

SERVICE BOX

STRAIN

RELIEF

POWER CORD

90-2018

FIGURE 6 – Hard Wire to 115 VAC Service

LINE			ELECTRICAL
VOLTAGE			SERVICE BOX
USE COPPER		LINE
SUPPLY WIRES		LINE	115V AC WIRING
		BLK	115V AC WIRING
	NTRL		TERMINALS
UTILISER DES FILS			TERMINALS
		WHT
D'ALIMENTATION		G
EN CUIVRE.		G

GROUND LUG

GROUND

LINE SERVICE

CABLE/CONDUIT

NEUTRAL	FITTING AS
	FITTING AS
	REQUIRED

90-2019

LOCATION CONSIDERATIONS

•Allow sufficient clearance for filter removal and to prevent airflow obstruction

•Electrical service access will require the removal of the side panel shown.. Allow sufficient space for service on this side of the unit..

•If locating the unit in an attic or crawl space, a Model 76 Control mounted in the living space is recommended..

•For attic installations, it is recommended that the dehumidifier be suspended..

•Always install the dehumidifier in a condensate pan when locating in or over a finished space..

FIGURE 7 – Filter Access Clearance
ELECTRICAL SERVICE
ACCESS THIS SIDE
	6" MINIMUM
	CLEARANCE
	FOR PROPER
	AIR FLOW
6 FT. POWER CORD
FILTER
TOP VIEW	20" MINIMUM
	20" MINIMUM
	CLEARANCE
	FOR FILTER
	(EITHER SIDE)
	90-2020

DRAIN INSTALLATION

The drain outlet on the dehumidifier can be hard piped using a 3/4” PVC Slip x 3/4” MNPT fitting and 3/4” nominal drain tubing or the provided 3/4” MNPT x 3/4” hose barb fitting and 3/4” clear PVC tubing can be used to drain the dehumidifier.. Always maintain a constant downward slope from the dehumidifier to the drain and do not allow soft tubing to curl up which may result in air lock.. NOTE: PTFE thread seal tape is recommended for the threaded connection and hand tighten only.. If hard pipe is used, PVC primer and cement is recommended for the slip fit connection..

LEVELING

The feet can be adjusted to level the unit, and if required, to accommodate drain fittings and a secondary condensate pan.. Leveling is required to ensure proper drainage from the dehumidifier.. See Figure 8..

FIGURE 8 – Level the Unit

0.38” MIN

2.00” MAX

3/4” FNPT DRAIN

90-2021

CONDENSATE PAN, CONDENSATE PUMP AND FLOAT SWITCH

Always install the dehumidifier in a condensate pan

when locating in or above a finished space.. Adhere FIGURE 9 – Float Switch Wiring to local codes regarding draining of the condensate

pan.. If a condensate pump is needed, install it in the condensate pan as well..

Install a condensate overflow safety switch (i..e.. float switch) in the condensate pan, remove the factory installed jumper wire between the Float Switch terminals on the control and wire the float switch

to the dehumidifier as shown in Figure 9.. Overflow safety switches on condensate pumps can be wired to the Float Switch terminals in a similar fashion..

FLOAT DH DH Switch

NORMALLY CLOSED

FLOAT SWITCH

90-1857

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