Carrier HRVCCSVB1100 Wall Control, Connect Ducts to ERV/HRV, Locate and Install Exterior Hoods

ERV / HRV

Connect Ducts to ERV/HRV

!CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in minor property damage from sweating duct or loss of unit efficiency and capacity.

If ERV/HRV duct work is installed in an unconditioned space, insulated flexible duct is required.

Insulated flexible duct is required on both fresh-air inlet and exhaust-air outlet ducts connecting to exterior wall. When using insulated flexible duct, the vapor barrier of the flexible ducts must be taped very tight to prevent condensation problems. To reduce pressure drop, stretch the flex duct and support it in a proper manner to avoid reduced airflow.

When connecting the ERV/HRV to a return-air duct system, insulated flexible duct can be used. However, when metal or rigid ducts are applied use approximately 18-in. (457mm) of flexible duct at ERV/HRV ports for fresh-air supply, and stale-air return. When using metal duct from fresh-air supply to system duct work, the metal duct should be insulated. (See Fig. 8.) This can act as a silencer when connecting ducts to return-air duct system. This should eliminate transmission of noise or vibration from unit to main duct system.

STALE-AIR

RETURN

FRESH-AIR

SUPPLY

FLEXIBLE DUCTS CONNECTING TO

RETURN-AIR DUCT SYSTEM

A08102

Fig. 8 - Flexible Duct Fit-Up

Locate and Install Exterior Hoods

IMPORTANT: To prevent condensation problems, insulated flexible ducts are required on both fresh-air inlet and exhaust-air outlet ducts connecting between ERV/HRV and exterior wall.

Fresh-air intake and stale-air exhaust must be separated by at least 6 ft (1.8m). Fresh-air intake must be positioned at least 10 ft (3m) from nearest dryer vent, furnace exhaust, driveway, gas meter, or oil fill pipe. Fresh-air intake must be positioned as far as possible from garbage containers and potential chemical fumes. When possible, it is advised to locate the intake and exhaust hoods on same side of house or building. The intake and exhaust hoods should never be located on interior corners or in dead air pockets (See Fig. 7). Both intake and exhaust hoods must be 18-in. (457mm) from ground and at least 12-in. (305mm) above anticipated snow level.

After selecting proper hood locations, make appropriate size hole through exterior wall, pass flexible duct through hole and insert hood tube into duct. Tape duct vapor barrier tightly around hood tube and insert assembly back into wall and fasten securely.

Condensate Drain

(For ERV, skip this step and continue to the next step.)

To connect condensate drain, proceed as follows:

1.Punch out holes in foam insulation and door, then insert sleeved grommets into bottom of unit using the gasket washer and nut. (See Fig. 9.)

2.Cut two sections of plastic tubing, about 12-in. / 305mm long and attach them to each drain.

3.Join the two short sections of plastic tubing to the “T” con- nector and the main tube as shown.

4.Make a loop in the tubing below the “T” connector to create a trap to prevent sewer gases from entering the ventilation system. (See Fig. 9.)

5.Connect unit drain to building’s main drain. Provide slight slope from unit for run-off.

A99268

Fig. 9 - Condensate Drain With Loop Trap (HRV Only)

WALL CONTROL

Types

Four remote wall control options are available:

1.Basic Control (see Table 1).

2.OneTouch Control

3.Standard Control (includes dehumidistat)

4.Latent Control (includes humidistat for use with ERV’s only)

Table 1 – Basic Control

MODE	OPERATION	DAMPER	FAN
		POSITION	SPEED
Off	Off	Closed to outside	Off
Low	Air exchange with	Open to outside	Low
	outside
Intermittent	Air exchange with	Open to outside	Low
	outside
High	Air exchange with	Open to outside	High
	outside

Location

The Standard Control and the Latent Control sense humidity and not temperature. They must be located in an area where they will continually monitor fresh air circulating within the home. Install ERV/HRV wall controls as close as possible to main system thermostat and follow same guidelines as installing a thermostat (locate approximately 5 ft (1.5m) above floor, mount on an inside partitioning wall, etc.)

Wiring

Remove top cover assembly from wall control and pass thermostat wire through hole located on back of control before attaching to wall. Connect Y, R, G, and B (yellow, red, green, and black)

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