Field Controls HHSC+ User Manual

HEALTHY HOME SYSTEM

CONTROL Plus

Model: HHSC+

The Field Controls Healthy Home System™ Controller Plus (HHSC+) is designed to work in conjunction with
the forced air HVAC system to periodically introduce fresh air into the home by controlling an FAD Fresh Air
Damper installed in a fresh air duct connected to the HVAC return plenum, and circulate it throughout the
home eectively and eciently, and enables the HVAC system to meet ASHRAE 62.2 and other ventilation
codes and standards.. The HHSC+ is designed to operate continuously year round without user intervention.
The HHSC+ is initially programed by the installer and operates interactively with the HVAC system thermostat.
Certain features are readily accessible by the occupants for customization of the system, to meet their individual
preferences.

ITEMS INCLUDED IN KIT:

1-HHSC+ Ventilation and Fan Cycling Control
1-Four-wire connector harness for FAD Fresh Air Damper (FAD not included)
1-Installation Hardware
1-Instruction Booklet

READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY BEFORE PROCEEDING WITH THE INSTALLATION.

This device MUST be installed by a qualied agency in accordance with the manufacturer's installation instructions. The denition of a
qualied agency is: any individual, rm, corporation or company which either in person or through a representative is engaged in, and
is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the precautions
required, and has complied with all the requirements of the authority having jurisdiction.

Installed By: Phone:

Please retain these instructions after installation.

Installation Date:

www.eldcontrols.com

FEATURES

• System Status LED

• User-Programmable Inhibit Mode

• UV lamp replacement reminder

• Air Filter replacement reminder

• Time/Date display

• Automatic Daylight Savings Time correction

• Damper Monitor Feature monitors FAD damper for proper operation

• Remote Activation Terminals: timer, on/o switch, Carbon Monoxide (CO) detector with alarm contacts,

makeup air sensor, multiples having dry contacts

• Auxiliary Output terminals (24 VAC): exhaust fan, etc.

• Powered by system transformer, works in conjunction with 24V thermostat or EIM, no additional transformer

required

• Compatible with any system having accessible 24V R W Y G terminals

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INSTALLATION

CHOOSE FAD FRESH AIR DAMPER LOCATION:

The fresh air damper can be located anywhere in the fresh air inlet duct. Minimize the length of the inlet
duct to improve airow and improve system eciency. It is recommended that the damper be as close to
the return air plenum and the HHSC+ as possible, and that the inlet duct connect to the return plenum
upstream of the system lter, and downstream of any duct-mounted sensors.

CHOOSE FRESH AIR INTAKE LOCATION:

ASHRAE recommends that the fresh air intake be located at least 10’ from any source of pollutants, such
as auto exhaust, dryer exhaust, exhaust from any fuel-burning appliance, etc. Avoid installation near odor
sources such as garbage bins or barbecue grills. A minimum of 3’ above ground is recommended to avoid
ingress of leaf litter, grass clippings, etc. Do not use a crawl space, basement, or attic as a source of intake
air. Always be sure to comply with local building code requirements regarding fresh air inlets.

CHOOSE HHSC+ CONTROL LOCATION:

The HHSC+ controller provided with your Fresh Air System can be installed anywhere in your home.
Because the HHSC+ does not require routine adjustment it is generally more eective to mount the
controller as close to the HVAC system and damper as possible.

CAUTIONS

• Before installing the HHSC+, turn o all power to your HVAC system.

• Read and follow all instructions carefully.

• Follow all local electrical codes during installation. All wiring must conform to local and national electrical

codes.

• Use caution when mounting components to surfaces that may have concealed wiring beneath the surface.

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INSTALLATION (con’t)

HOW TO INSTALL DAMPER:

The damper may be installed in any position; although it is recommended to install with the motor at the
3 or 9 o’clock position if mounted horizontally. Air may ow through in either direction, although it is
recommended to install with the crimped end as the outlet of the damper. Use care to avoid distorting the
damper housing, and provide adequate support.

HOW TO INSTALL THE CONTROLLER:

HHSC+ OVERVIEW

CAUTION: DISCONNECT POWER TO THE HVAC SYSTEM BEFORE BEGINNING ANY ELECTRICAL
CONNECTIONS OR MODIFICATIONS TO EXISTING WIRING.

1. Unsnap the HHSC+ mounting base (back of unit) from the HHSC+.

2. Route wires through large hole in the mounting base. Hold the base against wall and mark wall through 3
mounting holes.

3. Drill 3 - 1/8-in. pilot holes in wall where marked, or holes for drywall anchors if mounting on drywall.

4. Secure mounting base to wall with 3 screws (provided), making sure all wires extend through hole in
mounting base.

5. Adjust length and routing of each wire to reach proper terminal and connector block on mounting base
with 1/4 in. of extra wire. Strip only 1/8 to 3/16 in. of insulation from each wire to prevent adjacent wires
from shorting together when connected.

6. Connect wires to proper terminals of the connector blocks, use appropriate diagram from Typical Wiring
Diagrams. Both (R) and (C) must be connected for proper operation. Improper wiring or installation may
damage the controller. If using stranded wire, use caution to avoid shorts from stray strands. Check to
make sure wiring is correct before proceeding with installation or turning the unit on.

7. Push any excess wire into wall and against mounting base.

8. Snap HHSC+ onto base making sure pins align with sockets in connectors.

9. Once initially powered the HHSC+ will automatically enter into installer programming mode.

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TYPICAL WIRING DIAGRAMS

Figure 1 Single-Stage Heating/Cooling

Figure 2 Multi-Stage Heating/Cooling

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TYPICAL WIRING DIAGRAMS (con’t)

Figure 3 Heat Pump

WIRING TO OPTIONAL EXHAUST FAN AND/OR OPTIONAL REMOTE
OVERRIDE DEVICES

Figure 4 Exhaust Fan & Override Device Control

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