Smooth-Air HEX390 m User manual

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Warm stale Air from house

Fresh Air from outside

Warmed Fresh Air to house

Exhaust Air to outside

HEX

Heat is transferred to or from the incoming fresh air

HEX390

Heat Exchanger

with Digital or Manual Controller

Cleaner, Warmer, Drier, Healthier Homes

•Operating Instructions p2-4

•Installation Instructions p5-8

•Setup Instructions (digi) p9-12

•Wiring Diagrams p13-14

Congratulations on purchasing a HEX Energy Recovery Ventilation Unit

Draft

Manual controllerDigital controller

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

HEX

Operating Instructions

Cleaningtheunit’slters

The internal lters are designed as secondary lters (there should be

extended surface lters cleaning the air before reaching the unit). However,

when unit lters are heavily soiled, wash or replace the lter material.

To wash: use vacuum cleaner to remove excess dust, then wash in warm

detergent treated water, keep lters at or leave in frame to wash.

A A

B B

C C

D D

HRV ASSEMBLY

HEAT RECOVERY DESIGN

PROJECT

BEN MUNRO 18/02/2012

1 / 2

EDITION DRG. NO :

DATE MATERIAL

SCALE: 1:3

ALL DIMENSIONS IN mm

ALL DIMENSIONS +- 0.5mm UNLESS STATED

This is Smooth-Air Products copyright and contains proprietary owned

intellectual property rights and confidential data. All rights are strictly

reserved. The information must not be used except for the agreed

purpose. Unauthorised use, reproduction,or issue to any third party is not

permitted without the prior written authority of Smooth-Air Products. This

document is to be returned to Smooth-Air Products when the agreed

purpose is fulfilled.

DO NOT SCALE

391.5

343.0

263.0

754.5

600.5

90.3

PLAN VIEW

FRONT VIEW

ISOMETRIC VIEW

SIDE VIEW

Polymer cross ow

Heat Recovery core

Fans

Return Air

from house

Fresh Air

from outside

Supply Air to house

Exhaust Air to outside

Return Air lter

HEX unit

Supply Air

Return Air

Exhaust Air

Outside Air

The unit is designed to recover heat from exhaust air, which in turn warms (or

cools) the fresh outside air.

Supply Air lter

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Return Air lter

Fresh Air lter

Optional

Internal On/Off

Thermostat

3 speed switch

The 3 speed switch has four settings:

0 - Off

1 - Low

2 - Medium

3 - High

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

• Medium less people in the house and/or colder outside temperatures

• Low mainly to keep air fresh in the home during extremely cold conditions.

Internal On/off thermostat (optional) For the 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).

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

• Optional User System On/Off is available in User Menu, indicated by “OFF”

on unit display.

• Optional Filter Timer measures the hours run by the fan and gives a ashing

display when the lter needs to be cleaned/replaced.

• Clock function has battery back-up in the event of a power failure. Time can

be set/adjusted by pressing mode and ↓ buttons together until “Entering

Menus” then “Set Clock” appears. Time can then be adjusted using up & down

buttons, once correct time is set, press “mode” to save new setting.

• Optional Attic Damper Kit. A diverting branch can be attached to divert the

intake from the attic to the cooler outside air. Press mode and up arrow

together. ‘Enteringmenus’ will display, hold until ‘Damper is on’ or ‘Damper is o’,

then ‘Change damper? ON’ or ‘Change damper? OFF’ displays. Use the up arrow to

change between the two settings.

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).

The controller will automatically shut down in summer if outside air temperature

(OS) exceeds 27°C and home is warm.

There are a number of other features available at time of installation which will

need to be discussed with the installer when the unit is commissioned (see Digital

Controller Setup instructions p6-9). They include:-

• Optional supply air boost

heater (when heater tted) is

controlled automatically when

outside air temp (OS) is less

than 12°C and home is cold.

This is indicated by “H” with

bar symbol in the unit display.

Heat is controlled over a

proportional band so that as

OS gets colder, heater output

increases to maximum.

• Optional winter off

mode shuts down the fan

automatically when outside

temperature (OS) is less than

2°C. This is indicated by

“winter” on the unit display.

Fan Speed

Status

Outside Air

Temp (OS)

Operating

Mode

Inside Air

Temp (IS)

Fan Speed

Increase

Time

Fan Speed

Decrease

Mode

button

Heater option

not available for

HEXdigi-NH

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Exhaust Air

Fresh Outside Air

Balanced Pressure Ventilation

Supply Air

Return Air

Key Benefits

• Better Climate Control

• Reduced heating load

• Reduced air-conditioning load

• Fresh air

• Energy efficiency

• Reduces condensation

HEX390

Installation Instructions

These units must be installed by a suitably qualied tradesperson.

Electrical supply must be installed by a suitably qualied electrician as per the

schematics on p13 (manual controller) and p14 & p15 (digital controller).

Supplied:

• HEX unit

• HEX attic box

• Triple rocker switch (inside attic box)

• Drain adaptor (inside HEX lter access door)

Required:

• Primary extended surface lters

• External inlet and outlet grilles

• Internal supply and return grilles

• Duct

• Tape

• 3 and 4 core wire

• Drain condensate hose

2. Mount Unit securely in ceiling space (eg use bungees to

hang, or anti-vibration pad) where it can be readily connected

to an electrical supply and is sufciently high enough above

the ceiling that a condensate drain can be run with a fall and

P-trap to a suitable outlet (see drain installation over page).

Once duct etc connected, unit needs to be level for drain to

work properly.

HEX hangers on

top of unit

1. Plan layout, check required equipment:

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Exhaust Air

Return Air lter

Fresh Air lter

HEX body

Supply Air

Return Air

Outside Air

HEX

Drain

adaptor

P trap in condensate

drain hose

Drain Adaptor

Bottom of unit

Attach drain adaptor onto hole on base

of unit

4. External inlet and exhaust - Mount Fresh Air inlet and Exhaust Air discharge

away from each other, so that cross contamination is not possible, and as suits

the home owner.

5. Internal return and supply - Mount supply air grilles as suits the homeowner,

eg in the hallway and living areas. A hinged lter grille (eg PYHF400) can be

used for return air. Mount return air grilles as suits the homeowner, eg one in

the bathroom and one at the other end of the hall from supply grille.

6. Filters inside unit are secondary lters. Mount hinged lter grilles (eg

PYHF400) or extended surface lters (eg FBP200) in ducting prior to unit for

return air from house as well as fresh intake air.

3. Drain installation

Drain adaptor (supplied inside HEX lter

cover) is to be mounted to bottom of

HEX unit. HEX unit must be level.

Condensate drain hose

needs to be connected

and shaped into a “P

trap”, as in diagram:

7. Duct Attach insulated ducting to all spigots and Y branches securely, ensuring

an airtight seal by using tape. Duct runs must be stretched and as straight as

possible, with long radius bends to minimise airow resistance. Ducting must

be supported separately from the HEX unit. Ducts must be insulated.

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Internal On/off thermostat (optional)

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).

HEX Attic box

Temperature sensor

mounted in fresh air inlet

Temperature

sensor wire

plugs in here

9. Thermostat for Digital Controller

The thermostat for the digital controller is placed into incoming fresh air ow,

through the pre-drilled hole, and xed with the cable tie.

It is then plugged into the attic box as pictured above.

Cat5 cable to digital

wall controller

For digital controller, mount

with pack glands downwards

Terminate

separately

the grey &

brown wires

from the

HEX unit

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 qualied tradesperson

as per the schematics on pages 13, 14 & 15.

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Heater option not available for HEXdigi-NH

11. Next step

Before commissioning the digital controller, consider the desired options

for the situation & write them down eg on p12

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 airows.

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).

Return Air lter

Fresh Air lter

Optional

Internal On/Off

Thermostat

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Display Key

OS - Outside Air Temperature

IS - Inside Air Temperature

Winter - winter mode is on

H - Heater is tted

Heater option not available for HEXdigi-NH

HEX

There are a number of options which can be scrolled through by

pressing the Mode button as below.

If no button is pressed within 5 seconds the controller automatically

reverts to normal operation. Once a button is pressed a backlight will

operate and remain on for 20 seconds after the last keystroke.

Press ↑ button to toggle between Y/N (Yes/No) or other options, then

press ‘Mode’ to advance through the menu.

Options are on following pages.

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’.

The controller comes preset with default factory settings, these can be

reinstated using menu item ‘Factory Reset’ (number 14 on next pages). If the

unit is not set up correctly to suit the house, performance may be reduced.

Fan Speed

Status

Outside Air

Temp (OS)

Operating

Mode

Inside Air

Temp (IS)

Fan Speed

Increase

[Y/Ntoggle]

Time

Fan Speed

Decrease

Mode

[to scroll]

Digital Controller setup instructions continued on next page

Please note: if settings are changed from recommendations, performance

of the unit may be reduced.

HEX390man & HEX390digi - Operating Instructions, Installation Instructions, Wiring diagrams Sept 2015

Press together 5 secs to get Setup Menu,

display will then change to:

1. Heater Kit Y/N (default N).

If N - heater options are removed from all menus.

If Y - heater options are available in User menu - Heater On/Off for

continuous or night heat (to times as set below) .

To set night heat option:

• press up arrow to select Y, then:

• press mode to display ‘Heater Times’ >display then changes

automatically to show the current settings (default: )

>display changes again to ‘Change Times’ Y/N (default N).

• At this point, use then to select Y & change the times.

• Select desired Heater ON time in Hours:Mins using or

• Select desired Heater OFF time in Hours:Mins using or

• Heater Test Y/N (default N)

• change to Y, heater test will be performed. If there are any faults

(including no heater connected), ‘Heater Fault’ will display. (See

menu item 4.Fan Speed Heat for possible Heater Fault causes.)

To reset Heater Fault display, turn unit off.

2. Max Fan Speed (default 100%) – Range is 10% to 100% adjustable in

10% increments using up & down arrows.

For a large house set to a max of 100%.

3. Min Fan Speed (default 10%) – Range is 10% to 100% adjustable in

10% increments using up & down arrows.

For a large house set to a min of 50%

4. Fan Speed Heat (default 50%) – Range is 10% to 100% adjustable in

10% increments using up & down arrows.

Fan Speed Heat sets a minimum speed for the fan to ensure

enough airow for the heater to operate. There are many duct fan

combinations, some more restrictive to airow than others. Therefore,

when setting up, the installer must check that the heater operates

without ‘Heater Fault’ ashing on the display. ‘Heater Fault’ is triggered

when the heater is operating but draws no current, this is most often

due to insufcient airow causing the airow proving switch to cut off.

If there is insufcient airow, increase the ‘Fan Speed Heat’ setting.

Heater fault may also be caused by manual reset thermal cutouts which

may need to be reset.

Heater ON 19:00

Heater OFF07:00

Heater option not available for HEXdigi-NH

Use up arrow to change, then

mode to advance through menu

Use Mode button to scroll

through options

Press up and down arrows

together for 5 secs to get to

Setup Menu

Digital Controller setup instructions continued on next page

This manual suits for next models

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