Dehumidistat Operation

Low Voltage - 24 VAC

Dehum

idistat

 

 

 

 

e to

 

 

 

g Relativ

ns

 

Settin

 

 

 

 

 

 

Outside

Conditio

 

 

 

 

 

 

 

 

 

WINTER:

 

 

 

Set

dehumidistat

 

 

 

30% to

40%.

 

between

dry,

 

is too

.

If

home

 

 

 

to higher

setting

adjust

 

is too

humid,

 

If home

setting.

 

 

 

adjust

to lower

 

 

 

 

 

 

SUMMER:

 

 

 

Set dehumidistat

 

 

 

to OFF

 

 

 

 

Installation

REMOTE DEHUMIDISTAT

*requires 2 wires

anywhere humidity is a concern

opens dampers to allow ventilation when humidity level exceeds

selected setting

Part No. 99-130

 

 

 

 

 

PROBLEMS

SOLUTIONS

 

 

Air is too dry

• Increase humidity

 

 

 

• Switch ventilation mode from continuous

 

 

 

to intermittent

 

 

 

• Install a humidifier

 

 

 

 

 

 

Air is too humid

• Reduce the humidity

 

 

 

• Verify if dryer is venting in basement

 

 

 

• Verify if heating wood is stored in basement

 

 

 

• Wait for outside temperature to change

 

 

 

Ex. Summer can be extremely humid

 

 

 

• Verify balancing of the HRV

 

 

 

• Run furnace blower continuously to increase

 

 

 

ventilation rate

 

 

 

 

 

 

 

 

 

 

 

Return Air

 

 

3’

 

 

min.

 

Insulated

recommended

Outdoors

 

Duct

Built-in balancing damper*

 

 

 

 

in both air streams.

DRAIN

DRAIN

SPOUT

SPOUT

TAPE

TEE

CONNECTOR

Cool Air

Return

*Unit is normally balanced with furnace running at highest operational speed

Forced

Air

Furnace

TO DRAIN

NOTES:

1.Furnace blower is required to operate when ventilation is required.

2.Weatherhood arrangement is for drawing purposes only. Six feet (2 m) minimum separation required. Eighteen inches (460 mm) above grade minimum.

3.Due to pressure differences in the equipment, airflows must be adjusted and confirmed on site.

4.Maintenance should be performed twice a year or more if required. Remove and wash filters and core and replace. Outside hoods should be visually checked for blockage regularly.

5.Drain is required as shown above.

6.Built in balancing damper may require seasonal adjustments.

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Lifebreath 94-EXCHANGER-MD, 99-MD-KIT specifications Low Voltage 24 VAC, Dehumidistat Operation