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Heat Exchanger
with Digital or Manual Controller
Digital controller
Warm stale Air from house
Fresh Air from outside
Cleaner, Warmer, Drier, Healthier Homes
Congratulations on purchasing a HEX Energy Recovery Ventilation Unit
HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015
HEX390
• Operating Instructions
• Installation Instructions
• Setup Instructions (digi)
• Wiring Diagrams
Heat is transferred to or from the incoming fresh air
HEX
p2-4
p5-8
p9-12
p13-14
Manual controller
Warmed Fresh Air to house
Exhaust Air to outside
1
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Summary of Contents for Smooth-Air HEX390 m
- Page 1 HEX390 Heat Exchanger with Digital or Manual Controller • Operating Instructions p2-4 • Installation Instructions p5-8 • Setup Instructions (digi) p9-12 • Wiring Diagrams p13-14 Digital controller Manual controller Warm stale Air from house Warmed Fresh Air to house Exhaust Air to outside Fresh Air from outside Heat is transferred to or from the incoming fresh air Cleaner, Warmer, Drier, Healthier Homes Congratulations on purchasing a HEX Energy Recovery Ventilation Unit...
- Page 2 HEAT RECOVERY DESIGN permitted without the prior written authority of Smooth-Air Products. This document is to be returned to Smooth-Air Products when the agreed The unit is designed to recover heat from exhaust air, which in turn warms (or ALL DIMENSIONS +- 0.5mm UNLESS STATED PROJECT purpose is fulfilled.
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Page 3: Manual Controller
Manual Controller User Operating Instructions This unit has High / Medium / Low speeds which the homeowner can use to regulate the fresh air amount to suit the load. Typically: • High where a number of people are living in the house and/or outside temperatures are moderate •... -
Page 4: Digital Controller
Digital Controller User Operating Instructions Congratulations on purchasing a HEX, Heat Recovery Ventilator with Digital Controller. This controller allows the user to adjust fan speed from high to low (fan limits are set in the commissioning menu to suit the size of house and system layout). -
Page 5: Installation Instructions
Installation Instructions These units must be installed by a suitably qualified tradesperson. Electrical supply must be installed by a suitably qualified electrician as per the schematics on p13 (manual controller) and p14 & p15 (digital controller). 1. Plan layout, check required equipment: Supplied: •... - Page 6 3. Drain installation Drain adaptor (supplied inside HEX filter cover) is to be mounted to bottom of HEX unit. HEX unit must be level. Attach drain adaptor onto hole on base of unit Bottom of unit Condensate drain hose needs to be connected Drain Adaptor and shaped into a “P trap”, as in diagram:...
- Page 7 8. Mount Attic box Attic box can be mounted on the unit or anywhere in the attic. The hall controller - digital or manual 3 speed - will be shipped inside the attic box. Electrical supply must be installed by a suitably qualified tradesperson as per the schematics on pages 13, 14 &...
- Page 8 10a. Internal On/Off thermostat (optional) Digital Controller: If there is an internal On/Off thermostat, this should be disabled for digital controller, as the digital controller should control all airflows. 10b. Internal On/Off thermostat (optional) Manual Controller: The optional thermostat can be set so the unit turns off if incoming air exceeds the set point (eg if thermostat is set to 30, the unit will turn off if the incoming fresh air is above 30ºC).
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Page 9: Setup Instructions
Digital Controller Setup Instructions The Heat Recovery Digital Controller has a number of features available to customize the system to suit house size, layout and user preferences. The Setup menu is accessed by pressing the ↑ & ↓ buttons together for about 5 seconds until the display reads ‘Setup Menu’. - Page 10 Press up and down arrows together for 5 secs to get to Setup Menu Use up arrow to change, then Press together 5 secs to get Setup Menu, mode to advance through menu display will then change to: Use Mode button to scroll through options 1.
- Page 11 5. Winter Mode Y/N (default N). Winter mode shuts the system down when the outside air temperature gets below eg 2°C. If Winter Mode is on, another menu item will appear to allow adjustment of actual shut down temp: Range -2°C to +5°C.
- Page 12 Installer’s recommended settings: 1. Heater Kit Heater option not available for HEXdigi-NH Heater ON time: ..: ..Heater OFF time: ..: ..2. Max Fan Speed ..3. Min Fan Speed ..4. Fan Speed Heat ..Heater option not available for HEXdigi-NH 5.
- Page 13 Wiring for manual 3speed switch The attic box also comes with a two core wire for use with the optional thermostat. HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015...
- Page 14 Wiring for HEX digital controller Attic Controller Circuit Board Patch lead socket Terminate grey Isolator & brown wires Switch. from the HEX Circuit Board unit separately Patch lead socket See p7 for full Isolator image Heat Sensor Plug. Switch. Heat Sensor Plug. 240VAC MOTOR HEAT...
- Page 15 Heater option not available for HEXdigi-NH Electrical Supply 230VAC by installer HEXdigi Attic box wiring diagram HEX Warranty 24 months manufacturing warranty from date of first retail purchase. This HEX product, when delivered to you in new condition from a HEX authorized dealer and used in normal conditions, will be free from any defects in manufacturing, materials and workmanship for the periods set out above (“Warranty Period”): Any faulty goods will be repaired or replaced via the HEX dealer.
- Page 16 Operating Outside Air Mode Temp (OS) Fan Speed Inside Air Status Temp (IS) Time Fan Speed Mode Increase [to scroll] [Y/Ntoggle] Fan Speed Decrease Display Key OS - Outside Air Temperature IS - Inside Air Temperature Winter - Winter mode is on Heater is fitted Heater option not available for HEXdigi-NH Warm stale Air from house...
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