Ensto Enervent eair User manual

7.3.2016

Enervent eAir

ENG Installation instruction

ENGLISH................................................5

Read me ﬁrst..................................................6

Explanation of the type designation.....................6

Warnings ..................................................6

General ................................................6

Electrical ...............................................6

Terminology ..................................................7

Before installing unit ..........................................7

Selecting installation location ..............................7

Pinion, Pingvin, Pingvin XL, Pandion, Pelican, Pegasos,

Pegasos Twin Tropic and Pallas ..........................7

LTR-2, LTR-3, LTR-4, LTR-6 and LTR-7......................8

Building the ventilation system.............................9

Insulating ventilation ducts .............................9

Installing duct coils ....................................10

Installing ventilation unit ceiling installation plate

(OPTIONAL) ...........................................12

Installing geo-cooling equipment......................12

Installing CHG geothermal pre-heating / pre-cooling

equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Requirements and preparations for electrical connections . 14

Preparatory electrical work ............................14

Installation ..................................................18

Additional materials needed for installation ...............18

Installing models Pinion, Pingvin, Pingvin XL, Pandion, Pelican,

Pegasos, Pegasos Twin Tropic and Pallas ...................19

Wall installation .......................................19

Ceiling installation.....................................19

Floor installation ......................................21

Installing models LTR-2, LTR-3, LTR-4, LTR-6 and LTR-7......21

Draining condensate water ...............................21

Further installation phases:

models MD and MDE .....................................23

Installing model MDW ....................................23

Installing model CG, TCG and Twin Tropic CW ..............24

Installing model ION. .....................................24

Commissioning ..............................................25

Calibrating airﬂow ........................................25

Commissioning checklist..................................25

Control system ...........................................26

Commissioning eAir control panel .....................26

Important to know about control system ...............26

Setting up system with setup wizard ...................27

Setting up system without setup wizard ...................34

Documenting commissioning.............................36

Use ..........................................................36

General...................................................36

Using eAir control panel ..................................37

Description of operations .................................37

Operations ............................................37

TCG units..............................................38

Twin Tropic units ......................................38

Fans...................................................38

Constant duct pressure control ........................38

CO2, humidity and temperature boosting of fans .......38

Extra time (Oﬃce mode) ...............................39

Overpressure (lighting ﬁreplace) .......................39

Manual boosting ......................................39

Cooker hood and central vacuum cleaner modes .......39

Summer night cooling.................................39

Weekly and annual program ...........................39

Temperature control...................................40

Alarms ................................................41

Maintenance .............................................41

Changing ﬁlters .......................................41

Cleaning heat exchanger ..............................42

Cleaning fans..........................................42

Service of ionizer module. .............................42

Technical information and attachments.......................43

Table 1: Afterheating and cooling duct coils ...............44

Table 2: Preheating and precooling coils ...................45

Extra equipment available ................................47

Troubleshooting..........................................48

Models and components..................................53

Technical features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Dimensional drawings ....................................65

Wiring diagrams ..........................................83

MD basic electric diagrams ............................84

MD preheater electric diagrams........................89

TCG diﬀering electric diagrams.........................92

Pallas diﬀering electric diagrams .......................94

Twin Tropic diﬀering electric diagrams .................98

Miscellaneous electrical connections..................101

Principal diagrams .......................................107

Control diagrams ........................................123

MD adjustment charts ................................125

Pallas adjustment charts ..............................130

Twin Tropic adjustment chart .........................136

Table of parameters......................................137

Record of measuring air amounts and sound levels .......140

EU declaration of conformity .............................141

Representatives for the products outside Finland .........142

Installation instructions

ENGLISH

Read me rst

This document is intended for everyone involved in

installation of Enervent ventilation units. The equip-

ment described in this manual is to be installed by

skilled persons only, according to the instructions

given in this manual, and local law and regulations.

Failure to comply with instructions in this manual will

void the warranty of the equipment, and possibly

result in harm to people or property.

The equipment described in this manual is not to be

used by persons (including children) with reduced

physical, sensory or mental capabilities, or lack of

experience and knowledge, unless they have been

given supervision or instruction concerning use of the

equipment by a person responsible for their safety.

Tables at the end of this manual list

• ventilation units introduced in this document

• components that are included in the delivery

NOTE: If your delivery does not include all the

components listed in the Models and compo-

nents table at the end of this manual, check

your order and contact your seller or Ensto

Enervent before starting installation.

The type plate is located near the main power switch

or inside the ventilation unit. Before you start reading,

please check the type marking of the unit.

ilmastointilaite

ventilation unit

TYYPPI/TYPE:

SRJ.NRO/SERIAL NO:

W/ V/ HZ / A:

ENSTO ENERVENT OY

KIPINÄTIE 1 06150 PORVOO

TEL +358 (0)207 528800 FAX +358 (0) 207 528844

Explanation of the type designation

• The ﬁrst part of the type designation indicates the

chassis of the ventilation unit, for instance LTR-3, or

Pandion

• The next two letters indicates the type of automa-

tion the ventilation unit is equipped with, in this

case MD.

• The next letter of the type designation indicates the

type of afterheater the ventilation unit is equipped

with, E= electrical, W= water.

• The next two separate letters indicate if the ventila-

tion unit is equipped with cooling =C, and type of

cooling the ventilation unit is equipped with, G=

geothermal cooling, W= cooling with water, O=

integrated heatpump for cooling in Pegasos venti-

lation units. There can also be the letters XL in the

type designation. This indicates that the ventilation

unit is equipped with more powerful fans than nor-

mally. Example: Pegasos XL MDE-CG means a venti-

lation unit with Pegasos chassis, equipped with MD

automation, electrical afterheater, and geothermal

cooling functionality. Additionally the ventilation

unit is equipped with more powerful fans.

Warnings

General

WARNING: Before opening the maintenance

hatch, always make sure that the unit’s supply

voltage has been switched oﬀ.

WARNING: In case of malfunction, always

ﬁnd out the cause for it before restarting the

unit!

WARNING: After switching oﬀ the unit power,

wait two (2) minutes before starting mainte-

nance work. Even though the power is

switched oﬀ, the fans continue spinning and

the afterheater coil may remain hot for some

time.

WARNING: All ventilation units that come

with a water coil must be equipped with

dampers to avoid freezing of the coil during

possible power failure.

Electrical

WARNING: Do not open the electrical box

unless you are a qualiﬁed electrician.

Installation instructions

Term Explanation

outside air Outside air supply to ventila-

tion unit

underpressure

prevention Actions taken for avoiding

excessive under pressure cli-

mate inside when one or sev-

eral appliances are extracting

air in addition to the ventilation

unit.

summer night

cooling Cooling method that utilizes

cool outside air when the out-

side temperature is lower than

the inside temperature.

supply air Inbound air ﬂow to rooms.

%RH Relative humidity percent that

is used here for determining

whether ventilation should be

boosted to remove excessive

humidity.

Before installing unit

Selecting installation location

Before you start installing the ventilation unit, make

sure the installation location is suitable for the model

you are installing.

Pinion, Pingvin, Pingvin XL, Pandion,

Pelican, Pegasos, Pegasos Twin Tropic

and Pallas

The ventilation unit can be installed

• on the wall (Pinion, Pingvin, Pingvin XL and

Pandion)

• hanging from the ceiling (Pinion, Pingvin, Pingvin

XL and Pandion), requires ceiling installation plate,

(sold as accessory)

• on the ﬂoor (Pandion, Pelican, Pegasos and Pallas),

• on a suitable, ﬂat plane.

Ventilation unit models Pinion, Pingvin, Pingvin XL,

Pandion, Pelican, Pegasos, Pegasos Twin Tropic and

Pallas need to be installed in a warm space (over

+5°C):

• We recommend the unit is installed in a technical

space if one is available.

WARNING: Make sure you follow the local

regulations for electrical installations.

WARNING: Make sure the unit is fully

detached from the electrical network before

carrying out voltage tests, insulation resist-

ance measuring or other electrical work or

measuring. This kind of work may cause

damage to sensitive electronic equipment.

WARNING: Control equipment used in venti-

lation units may cause leakage current. This

may aﬀect the functionality of fault current

protection.

WARNING: All ventilation units that come

with an MD control system must be equipped

with over voltage protection.

Terminology

Term Explanation

active cooling Cooling created by a cooling

unit included in some ventila-

tion units.

after heating After heating warms the air

after the heat recovery wheel.

It ensures that the incoming air

is not too cold. After heating

can be realized with either an

electrical or water coil. Suitable

temperature for the incoming

air is 5°C less than the room

temperature if no extra heating

of the room i desired.

click models New ceiling installation

method for models Pingvin and

Pandion.

eAir Control panel for managing the

ventilation unit.

exhaust air Air removed from house after

heat recovery.

extract air Outbound air ﬂow from rooms.

Modbus Communication protocol that

is used here for communication

between the ventilation unit

and home automation systems

(+ possible accessories).

• Avoid installing the unit in spaces with high tem-

perature and high humidity level. In certain condi-

tions these can cause condensation on the unit’s

outer shell.

• Consider the unit noise level when choosing the

installation location. If possible install the unit on

a soundproof wall. Avoid installing the ventilation

unit directly outside a bedroom, since even though

the ventilation unit is quiet, it can never be com-

pletely silent.

• Install an insulating plate at the back of the ven-

tilation unit, or otherwise try to prevent structure

borne noise. Soft, foamed plastic sheets are recom-

mended for this (not included in the delivery).

• Make sure it is possible to connect the condensate

water drain and water lock and consider the space

needed for it.

• Make sure to install ﬁre shutoﬀ valves if the unit is

placed in a separate ﬁre area.

• Units mounted on the wall are recommended to be

installed on a partition wall rather than on an exte-

rior wall.

• Consider the unit maintenance tasks when install-

ing the unit: Doors of the unit need to be fully

opened for maintenance work. Leave minimum 15

mm space surrounding the ventilation unit to the

sides. Otherwise the service doors cannot be fully

opened.

• Consider the space needed for duct coils (if

included).

LTR-2, LTR-3, LTR-4, LTR-6 and LTR-7

LTR-2, LTR-3, LTR-4, LTR-6 and LTR-7 ventilation units

can be installed in either warm or cold space.

All LTR-2, LTR-3 and LTR-4 units can be installed in two

positions: maintenance hatch up or on the side.

Standard LTR-6 and LTR-7 unit can be installed with

the maintenance hatch up. On request, units can be

made for installation with the hatch on the side. This

must be mentioned when the unit is ordered. LTR-4,

LTR-6 and LTR-7 ventilation units equipped with built

in cooling coil are recommended to order with the

maintenance hatch to the side. This will enable the

condensation formed in the cooling coil to drain more

easily.

WARNING: Do not install any LTR units so

that the maintenance hatch is facing down-

wards or so that the unit is standing upright.

Always make sure one of the condensate

water drains is downwards.

• Installation location for LTR units can be for exam-

ple in a storage space or attic.

• Insulate the unit with a minimum of 100 mm extra

layer of insulation, if it will be installed in a space

where the temperature drops below +5°C. If you are

using solid (hard) insulation, make sure the insula-

tion does not carry sound to the frame of the house.

• Avoid installing the unit in spaces with high tem-

perature and high humidity level. In certain condi-

tions these can cause condensation on the unit’s

outer shell.

• Consider the unit noise level when choosing the

installation location. Avoid installing the ventilation

unit directly outside a bedroom, since even though

the ventilation unit is quiet, it can never be com-

pletely silent.

• Set the unit on top of a sound-prooﬁng 100 mm

insulation.

• Make sure it is possible to connect the condensate

water drain and water lock and consider the space

needed for it.

• Make sure to install ﬁre shutoﬀ valves if the unit is

placed in a separate ﬁre area.

• Consider the unit maintenance tasks when install-

ing the unit:

• Make sure that there is enough space in front of

or above the maintenance hatch:

• LTR-2 and LTR-3 min. 50 cm

• LTR-4 and LTR-6 min. 60 cm

• LTR-7 min. 70 cm

• Make sure the electrical connections can be

easily accessed.

• Take into account the space needed for opening

the maintenance hatch locking latches.

• Consider the space needed for duct coils (if

included).

Installation instructions

NOTE: The ventilation ducts must be plugged

close until the ventilation system is taken into

use. This is in order to keep warm air from

ﬂowing into the duct. Warm air causes con-

densation if it meets cold outside air or sur-

faces in the duct. Furthermore the plugging

keeps dirt and other unwanted particles from

clogging the system.

Insulating ventilation ducts

Insulate the ventilation ducts appropriately. This is

especially important when the ventilation unit comes

with cooling functionality.

Ventilation ducts must be thermally insulated to pre-

vent water from condensing to the inner or external

duct surfaces in any circumstances. Additionally, the

air temperature must not decrease or increase exces-

sively in the ducts because of external factors. The

ventilation engineer calculates the insulation require-

ments depending on the placement of the ducts and

the air temperatures.

Ventilation duct thermal insulation in heating use

Supply air duct from

the ventilation unit

to the supply valve

The insulation must be

designed and implemented

so that the maximum air tem-

perature change in the duct is

less than 1°C.

Extract air duct from

the extract valve to

the ventilation unit

The insulation must be

designed and implemented

so that the maximum air tem-

perature change in the duct is

less than 1°C.

Ventilation duct thermal insulation in cooling use

Supply air duct from

the ventilation unit

to the supply valve

The insulation must be

designed and implemented

so that the maximum air tem-

perature change in the duct is

less than 1°C. At least 18 mm

of cellular rubber insulation

on the duct surface and suﬃ-

cient additional insulation.

Extract air duct from

the extract valve to

the ventilation unit

The insulation must be

designed and implemented

so that the maximum air tem-

perature change in the duct is

less than 1°C.

Building the ventilation system

Designing the ventilation system must be done by a

professional ventilation designer. By following closely

the design plan when building the ventilation system,

you ensure the operation of the whole ventilation

system and customer satisfaction. Use the Enervent

Energy Optimizer calculation program at the Enervent

home page to calculate the performance and esti-

mated heating/cooling power of a particular ventila-

tion unit.

• Use type-approved factory made materials when

building the ventilation system.

• Use valves that are suitable for mechanical

ventilation

• Do not cover the outside air grating with mosquito

net. This would make it very diﬃcult to keep clean.

• Prevent rain water and snow from entering the out-

side air and exhaust air duct.

• Install enough inspection hatches in the ventilation

network to enable cleaning of the ventilation ducts.

• To make it easier to ﬁnd the inspection hatches,

mark their location for example on the rafters.

• Ventilation systems for diﬀerent ﬁre zones must

be separate. For example garage is one ﬁre zone

whereas living quarters are another ﬁre zone, which

means that they cannot be connected to the same

ventilation system.

• Use a cooker hood with its own fan in the kitchen,

above the stove. The cooker hood should have

its own extract duct directly out. A motorless

cooker hood can be connected to the ventilation

unit only if the ventilation unit has a cooker hood

connection.

• A drying cabinet with its own fan can be indirectly

connected to the outlet valve using the connection

system that comes with the drying cabinet. If this is

done, some of the extract air will be taken from the

living space and some from the drying cabinet. The

extract air must ﬂow through the valve at a speed

of 12 litres / second minimum

• Install silencers at least in the supply and extract

ducts.

• The amount of silencers must be considered case

by case.

• We recommend that automatically closing damp-

ers are installed in outside and exhaust air ducts. In

case of a power failure, the dampers will close and

block out cold air, preventing any water coil from

freezing. If cold air gets into ventilation ducts, it will

create condensate when mixing with warm air.

• Install pressure-diﬀerence transmitters in the ducts

if the unit is to be constant duct pressure controlled.

Cold/semi-warm* spaces:

• In standard ventilation the insulation must be

designed and implemented so that the maximum

air temperature change in the duct is less than 1°C.

For example, 100 mm of sheet, mat, or pipe-cov-

ering insulation can be used (plus the blown wool,

when used).

In heating and cooling use see tables Ventilation duct

thermal insulation in heating use and Ventilation duct

thermal insulation in cooling use.

Exhaust air duct

Cold spaces:

• 100 mm of sheet, mat, or pipe-covering insulation

Warm/semi-warm spaces:

• Option 1: 80 mm insulation with vapour-proof

external surface

• Option 2: 20 mm of cellular rubber insulation on

the duct surface and 50 mm insulation with vapour-

proof external surface.

The insulation must prevent water vapour from con-

densing to the external and internal duct surfaces.

Circulation air duct

The insulation must be designed and implemented so

that the maximum air temperature change in the duct

is less than 1°C. When Kotilämpö systems are renewed,

the recycling air duct can be left as it is.

* semi-warm space = +5-+15°C

NOTE: Note that duct coils included in the

ventilation system must be insulated the

same way as the ducts.

Installing duct coils

Duct coils are used in several unit models both as pre

heaters, afterheaters and coolers. For information

what type of coils are used with your particular venti-

lation unit model, please refer to tables listing models

with duct coils at the end of this manual. Check the

principal diagrams at the end of this manual for cor-

rect mounting of duct coils.

Table 1 lists the ventilation unit models that come

equipped with duct coils for after heating or cooling.

Ventilation Duct Insulation Examples

Sound insulation is not taken into account in these

insulation instructions and examples.

NOTE: A semi-warm* space refers also to

dropped ceilings, sub-ﬂoors, and casings.

Outside air duct (fresh air duct)

Cold spaces:

• 100 mm of sheet, mat, or pipe-covering insulation

(plus the blown wool, when used).

Warm/semi-warm* spaces and also for dropped ceil-

ings, sub-ﬂoors, and casings:

• Option 1: 80 mm insulation with vapour-proof

external surface

• Option 2: 20 mm of cellular rubber insulation on

the duct surface and 50 mm insulation with vapour-

proof external surface.

The insulation must prevent water vapour from con-

densing to the external duct surface and excessive air

temperature rise during summer.

Supply air duct

Cold/semi-warm* spaces and also for dropped ceil-

ings, sub-ﬂoors, and casings:

• In standard ventilation the insulation must be

designed and implemented so that the maximum

air temperature change in the duct is less than 1°C.

For example, 100 mm of sheet, mat, or pipe-cov-

ering insulation can be used (plus the blown wool,

when used).

Warm spaces:

• Insulation is not required in standard ventilation.

In heating and cooling use see tables Ventilation duct

thermal insulation in heating use and Ventilation duct

thermal insulation in cooling use

Extract air duct

Warm spaces:

• Insulation is not required in standard ventilation.

Installation instructions

These coils are installed in the supply air duct (after

the ventilation unit).

Table 2 shows preheating/precooling coils. These coils

are installed in the outside air duct (before the ventila-

tion unit).

Duct coils must be accommodated in the ventilation

ducts. There must also be suﬃcient room for mainte-

nance and draining condensate water.

NOTE: For more technical details about the

coils, see the technical features table at the

end of the manual.

Duct coil for uids

When installing a duct coil

• Place the duct coil in the supply air duct after the

ventilation unit or in the outside air duct before the

ventilation unit depending on its function.

• Make sure there is a ﬁlter before pre-heater coils in

the outside air duct to prevent dirt from entering

the coil.

• Do not install the coil too close to a fan outlet

or a bend in the ducting. This can result in lower

eﬃciency.

• Connect the coil so that the system is easy to empty

for maintenance.

• A duct heater can be ﬁtted in a horizontal or a verti-

cal duct with optional direction of airﬂow. To facili-

tate venting of the coil, the unit should be ﬁtted

with the longitudinal tubes horizontal.

• A duct cooler must be ﬁtted in a horizontal duct

and the airﬂow must be in the direction of the

arrow. The cooler must be insulated externally to

prevent the formation of condensation. The cooler

must be connected to a condensate drain and

water trap and tilted at an angle of 10-15 degrees to

the horizontal in the direction of the drain.

• Insert the coil into standard spiral ducting and

attach it to the ducting with screws. Support the

weight of the coil.

• Connect the coil with clamping ring connectors.

• Connect the water inlet to the lowest pipe connec-

tor in order to facilitate venting of the coil.

• Consult the principal drawings at the end of the

manual on how to construct the hydronic circulat-

ing system.

• Install a venting valve near the coil or at the highest

point in the system.

• Check the duct coil and its connections for leaks

immediately after the system has been ﬁlled with

liquide.

• Place the supply air temperature sensor (TE10) in

the duct after the coil, and the water coil return

water sensor (TE45) on the return water pipe of the

coil, if the coil is mounted in the supply air duct.

Place the outside air temperature sensor (TE01)

in the outside air duct before the coil, if the coil is

mounted in the outside air duct.

• Connect the sensor to the ventilation unit control

circuit board. Refer to the electrical schematics at

the end of this manual for correct connections.

Electrical duct coils

• The heater is designed for insertion into stand-

ard spiral ducting and is ﬁxed to the ducting with

screws.

• The air must ﬂow through the heater in the direc-

tion indicated by the arrow on the side of the con-

nection box.

• The heater can be ﬁtted in either horizontal or verti-

cal ducting. The heater may only be ﬁtted in ducts

that are made of incombustible and heat-and-cold

resistant material. The connection box can be freely

placed facing upwards or sideways to a maximum

angle of 90°.

WARNING: Fitting with the connection box

facing downwards is NOT allowed.

• The distance from (to) the heater to (from) a duct

bend, valve, ﬁlter, etc, should correspond to at least

twice the duct diameter. Otherwise there is a risk

that the airﬂow through the heater will be uneven

which can cause activation of the overheating

cut-out.

• The duct heater may be insulated in accordance

with valid regulations for ventilation ducting.

However, the insulation must be incombustible. The

insulation must not cover the lid, since the rating

plate must be visible and the lid must be remova-

ble. Furthermore, the insulation must not cover any

heatsinks, nor the side of the connection box where

the SCR’s (Triac’s) are mounted.

• The duct heater must be accessible for replacement

and inspection.

• The distance from the heater metal casing to any

wood or other combustible material must NOT be

less than 30 mm.

• Install the duct sensor TE10 (delivered with the

heater) in the duct after the heater, if the heater is

mounted in the supply air duct. Or if the heater is

mounted in the outside air duct, install the temper-

ature sensor (TE01) before the heater in the outside

air duct and connect the sensor(s) to the MD con-

trol circuit board..

NOTE: We recommend installing a safety

switch for the electric heater.

Installing ventilation unit ceiling installa-

tion plate (OPTIONAL)

NOTE: Ceiling installation plate is separately

sold extra equipment available for ventilation

unit models Pinion, Pingvin, Pingvin XL and

Pandion.

Before attaching the ceiling installation plate

• Make sure that the ceiling is even so that the plate

will be stable and straight after it has been installed.

• The gap between the plate and the back wall

should be at least10 mm (recommendation) and at

least 15 mm between the plate and the side walls.

• Consider the height level of the ﬁnal ceiling surface

material. The top of the ceiling installation plate can

be max 15 mm above the inner ceiling level.

To attach the ceiling installation plate,

1. Prepare holes in the ceiling for the ventilation

ducts.

2. Attach the plate on the ceiling using screws that

are suitable for the ceiling material.

3. Seal the ceiling installation plate against the ceil-

ing’s vapor barrier using for example duct tape.

4. Attach the ducts to the ceiling installation plate

with rivets.

Make sure there are no gaps between the insula-

tion and the ducts.

5. Consider the unit’s weight when screwing the

plate to the ceiling. The ceiling installation plate

must be absolutely rigid. Weights for all units are

found in the technical table in the end of this

instruction.

Installing geo-cooling equipment

If a geothermal heat pump is in use, the cold brine in

the ground loop can be used in the summertime to

cool the incoming air. The system can be implemented

in two ways: the solution can be circulated through

the geothermal pump (option 1) or a separate pump

can be used (option 2). The cooling coil can be either

built in the ventilation unit or it can be a duct coil,

depending on the model. A duct coil is mounted

in the supply air duct after the ventilation device.

Standard ventilation unit delivery is according to

option 2.

Detailed principal charts are found at the end of this

manual.

Option 1:

A geothermal heat pump is used for circulating brine

also in the supply air coil.

The delivery includes

• a relay for starting up the brine pump. The relay is

situated on the unit motherboard, connection DO3.

• a 3-way control valve (Termomix D32S) needed for

cooling and

• the actuator (Belimo NRYD24-SR-W + installation

set MS-NRE).

Temperature is controlled using the ventilation unit’s

own automatic control. The ventilation unit controls

the geothermal heat pump and the 3-way valve.

Installation:

1. Mount the cooling coil horizontally in the supply

air duct (in case of a duct coil).

2. Isolate a separate loop for the cooling coil.

Don’t forget the one-way valve. Follow the princi-

pal chart at the end of this manual.

3. Connect the condensate water outlet.

4. Install the 3-way valve and the actuator in the

ground collector’s piping. The actuator will con-

trol the brine ﬂow to the cooling coil as needed.

Be sure to isolate the pipes carefully with vapour

proof insulation to prevent condensation on the

outside of the pipes in warm and semi-warm

spaces.

Installation instructions

The heat pump will not be started up for ventilation

cooling.

Installation:

1. Mount the cooling coil in the supply air duct (in

case of a duct coil).

2. Connect the condensate water outlet.

3. Build a separate pump group with valve and

actuator for circulating cool brine adjacent to the

ventilation unit cooling coil. Be sure to isolate the

pipes carefully with vapour proof insulation to

prevent condensation on the outside of the pipes

in warm and semi-warm spaces.

Follow the principal chart at the end of this

manual.

NOTE: The valve and actuator must be in the

same position when connected. When the

valve is in open position, the actuator is

turned counter-clockwise before connecting,

and when the valve is closed, the actuator is

turned cw before connecting. The Figure 1

shows the valve and markings on valve spin-

dle in valve open (cooling/heating on max)

position.

4. Prepare / connect wiring between the ventilation

unit, the geothermal pump and the actuator, as

shown in the connection diagram at the end of

this manual.

Installing CHG geothermal pre-heating /

pre-cooling equipment

A geothermal pre-heating / pre-cooling coil for

improving the system energy eﬃciency can be

installed in the ventilation system. A duct coil is always

used when a hydronic pre-heating coil is needed. The

coil is mounted in the outdoor air duct before the ven-

tilation unit. The duct or the coil must have a ﬁlter to

keep dirt out of the coil.

To avoid freezing the coil, the brine used in the coil

system must meet the local rated temperature value.

For example in Helsinki, the brine must still be func-

tional at -26°C whereas in Lapland the temperature

value is -38°C.

It is also possible to use earth to air heat exhangers

(Earth tubes) for pre-heating or pre-cooling. The earth

tube must be combined with a normal outside air

duct and a damper that switches the outside air ﬂow

between the earth tube and the normal outside air

duct depending on the actual need for pre-cooling

Figure 1. Valve and actuator open counter-clockwise and close clock-

wise. Picture shows valve and actuator in the fully open position. Also

shown is the allowed direction of the liquid ﬂow.

NOTE: The valve and actuator must be in the

same position when connected. When the

valve is in open position, the actuator is

turned counter-clockwise before connecting,

and when the valve is closed, the actuator is

turned cw before connecting. The Figure 1

shows the valve and markings on valve spin-

dle in valve open (cooling/heating on max)

position.

5. Prepare / connect wiring between the ventilation

unit, the geothermal pump and the actuator.

Option 2:

A separate pump is used for circulating brine in the

supply air coil.

The delivery includes

• a relay for starting up the circulation pump for the

ventilation unit’s cooling coil. The relay is situated

on the unit motherboard, connection DO3.

• a 3-way control valve (Belimo R3..) needed for cool-

ing and

• the actuator (Belimo TR24-SR).

Temperature is controlled using the ventilation unit’s

own automatic control. The ventilation unit controls

the circulation pump and the 3-way valve.

and pre-heating. The damper can be controlled from

the same relay that controls the circulation pump for

the hydronic pre-cooler/heater.

The CHG pre-heating / pre-cooling system can be built

as a separate system (option 1) or as a part of the geo-

thermal heat system (option 2).

Detailed principal charts are found at the end of the

manual.

Option 1:

A ground loop is built for the pre-heating/cooling coil.

To avoid freezing of the system, brine in the loop must

meet the local rated temperature value. The ventila-

tion unit automatic control regulates the system’s tem-

perature. The ventilation unit controls the circulation

pump and the 3-way valve.

Installation:

1. Mount the cooling/heating coil in the outside air

duct.

2. Connect the condensate water outlet.

3. Build a separate pump group for circulating cool

brine adjacent to the ventilation unit cooling/

heating coil. Be sure to isolate the pipes carefully

with vapour proof insulation to prevent conden-

sation on the outside of the pipes in warm and

semi-warm spaces.

4. Prepare / connect wiring between the ventilation

unit, the circulation pump and the actuator.

5. Install and connect the outside air temperature

sensor (TE01) in the outside air duct before the

duct coil. Consult the electrical connection dia-

grams at the end of this manual.

Option 2:

A separate loop is isolated from the geothermal pump

brine loop for the cooling coil. To avoid freezing the

coil, brine in the loop must meet the local rated tem-

perature value. In addition to this, a heat exchanger is

installed in the coil system to ensure the functionality

of the geothermal pump. For the pre-heating / pre-

cooling coil to yield any beneﬁts, there must be some

ﬂow in the collector ground loop of the geothermal

pump. Temperature is controlled using the ventilation

unit’s own automatic control. The ventilation unit con-

trols the circulation pump and the 3-way valve.

Installation:

1. Mount the cooling / heating coil in the outside air

duct.

2. Connect the condensate water outlet.

3. Build a separate pump group for circulating cool

brine adjacent to the ventilation unit cooling coil.

Be sure to isolate the pipes carefully with vapour

proof insulation to prevent condensation on the

outside of the pipes in warm and semi-warm

spaces.

4. A heat exchanger is installed in the coil system.

5. Install and connect the outside air temperature

sensor (TE01) in the outside air duct before the

duct coil. Consult the electrical connection dia-

grams at the end of this manual.

6. Prepare / connect wiring between the ventilation

unit, the geothermal pump and the actuator.

Requirements and preparations

for electrical connections

NOTE: Only an authorized electrician is

allowed to perform electrical work on the

ventilation units.

Refer to the electrical drawings at the back of this

manual.

Preparatory electrical work

Before you start the installation, make sure that:

• Appropriate power supply is available for the venti-

lation unit.

• Higher than 30mA fault current is provided.

Because of this, no other electrical appliances

should be plugged into the same outlet.

• An internet connection is provided, if the user

wants to access the eAir panel network interface.

• Wall mount of the eAir panel is installed on a wall

junction box. Do not keep the eAir wall mounting

bracket uninstalled while using the eAir panel. If

You accidentally contact the circuit board behind

the wall mounting bracket with your hand or

any conductive object, you can damage the wall

mounting bracket.

• Cabling between the unit and the control panel

wall mount. The cable must run inside a protective

conduit of at least Ø 20 mm. The cable included in

the basic delivery is 10 m. Optionally, a 30 m cable is

available. The cable heads are type RJ4P4C.

Installation instructions

External sensors:

Some external sensors might need to be installed

depending on model of ventilation unit.

• The sensor element for duct mounted temperature,

RH and CO2 sensors is to be mounted inside the

duct. Most temperature sensors are supplied with

a ready made 5 m long cable. RH and CO2 sensors

need wiring on site.

• The place for the sensor is chosen according to

the unit of measurement that is to be measured.

Consult the control diagram at the end of this

manual. The placement in the duct is chosen at a

straight segment, at least 2x the duct Ø before and

after any duct coil, bends or ﬁttings.

• A suitable hole for the sensor and a rubber grom-

met is drilled in the duct.

• Sensors attached to a cable is pushed trough the

rubber grommet so that the sensor element is a few

centimetres inside the duct. The rubber grommet

must be air tight, and tight enough that the sensor

cable cannot slip trough by itself. A cable tie is rec-

ommended to lock the sensor in place.

• Sensors with rigid pipe type sensor elements,

are mounted trough an adjustable ﬂange, that is

mounted to the duct. The sensor element is pushed

trough the ﬂange and locked in place with a screw

at a suitable depth.

• Electrical connections are done according to the

electrical schematics at the end of the manual.

Preparing eAir control panel wall mounting

bracket

The eAir control panel needs to be installed on a wall

junction box. One ventilation unit can be controlled

with the maximum of 2 panels. The panels can have

their own wall mounting brackets, or both panels can

be linked to the same wall mounting bracket. If the

panels have a shared holder, the other panel needs

a separate micro USB charger (not supplied by Ensto

Enervent).

Commissioning two control panels with their own

wall mounting brackets

If the ventilation unit is controlled with two control

panels with their own wall mounting brackets, the

panels must be given diﬀerent addresses. The address

is chosen on the controller card on the back of the wall

mounting bracket. One of the wall mounting brackets

will get the address“1” and the other the address“2”.

We recommend that the address is marked both on

the wall mounting bracket and on the control panel,

so the residents know which panel belongs in which

wall mounting bracket.

Commissioning two control panels with shared

wall mounting bracket

If the ventilation unit is controlled with two control

panels with a shared wall mounting bracket, the

additional panel must be linked to the wall mounting

bracket. To do that, slide the DIP sliding switch“2”

down and up again. Check the electrical connection

diagram on page 85 . The linking mode is activated

if a yellow LED light starts ﬂashing on the controller

card. The linking mode is active for 10 minutes.

Momentarily place the eAir operating panel in the wall

mounting bracket, for the panel to start up. The panel

will show that it is trying to connect to the network.

Press Re-connect the radio > Reset. Now the control

panel will connect to the wall mounting bracket.

Connecting room temperature sensor to wall

mounting bracket (additional equipment)

In order to run the unit on room temperature regula-

tion, a room temperature sensor must be connected.

The room temperature sensor is connected to the con-

troller card on the back of the wall mounting bracket.

If you install two wall mounting brackets with room

temperature sensor, the sensor TE20 is connected to

the wall mounting bracket“1” and TE21 connected to

the wall mounting bracket“2”.

NOTE: You need to go through the set-up

wizard only in one of the panels. Connect

the power to the other panel when you are

ready with the wizard. The panel will fetch the

updated data from the motherboard.

The functions and accessories listed in the following table may need external wiring or connecting to

function:

Location on MD

controller card Voltage/current Cable

(example) Wiring outside

AHU

AI NTC

TE20 /TE21 Room temperature

sensor Connector on

eAir operating

panel wall holder

circuit board

3,3VDC KLM 2X0.8 Yes

TE01 Outside air temperature X1 3,3VDC Quick connector

5m cable sup-

plied with AHU

Yes, if preheater/

preecooler (CHG)

TE10 Supply air temperature X3 3,3VDC Quick connector

5m cable sup-

plied with AHU

Yes, if duct heater/

cooler coil

TE62 Supply coil liquid pipe

(MDX) X5 3,3VDC Quick connector

5m cable sup-

plied with AHU

Yes, if DX duct coil

TE62 (MDX)

TE45 Heating coil return water

temperature X12 3,3VDC Quick connector

5m cable sup-

plied with AHU

Yes, if duct heater

coil

Digital outputs DO Potential free contact

ON/OFF Control for heating DO2 Max 250VAC/50VDC

8A/2A inductive load MMJ 3x1,5 Yes, if hydronic

heating

ON/OFF Control for cooling

/ ON/OFF control for heating

(MDX)

DO3 Max 250VAC/50VDC

8A/2A inductive load MMJ 3x1,5 Yes, except HP and

ON/OFF Control for dampers DO5 Max 250VAC/50VDC

8A/2A inductive load MMJ 3x1,5 Yes

ON/OFF Control for preheating

/ ON/OFF Control for precool-

ing (CHG) / ON/OFF Control for

heating circulating pump (Aqua

KIW)

DO6 Max 250VAC/50VDC

8A/2A inductive load MMJ 3x1,5 Yes, except Twin

Tropic or built in

preheater coil

Timer controlled relay / ON/OFF

Control for circulating pump

PU80 (Aqua) / ON/OFF control

for extract air cooling (TCG)

DO7 Max 250VAC/50VDC

8A/2A inductive load MMJ 3x1,5 Yes

A/AB alarm output NO DO8 Max 250VAC/50VDC

8A/2A inductive load KLM 2x0.8 Yes

Analog inputs AI

%RH1 AI1 (user

conﬁgurable) 0-10VDC KLM 4x0.8 Yes

%RH2 / Boiler temperature TE80

(Aqua) AI2 (user

conﬁgurable) 0-10VDC KLM 4x0.8 Yes

Free / PDE10 supply air duct

pressure AI3 (user

conﬁgurable) 0-10VDC KLM 4x0.8 Yes

Free / PDE30 extract air duct

pressure AI4 (user

conﬁgurable) 0-10VDC KLM 4x0.8 Yes

CO2/1 AI5 (user

conﬁgurable) 0-10VDC KLM 4x0.8 Yes

CO2/2 AI6 (user

conﬁgurable) 0-10VDC KLM 4x0.8 Yes

RH10 Supply air relative humid-

ity sensor (Dehum/Twin Tropic/

TCG)

AI11 (sw

conﬁgurable) 0-10VDC KLM 4x0.8 Yes, if duct coil

TE10 Supply air temperature

(Dehum/Twin Tropic/TCG) AI12 (sw

conﬁgurable) 0-10VDC KLM 4x0.8 Yes, if duct coil

Installation instructions

Location on MD

controller card Voltage/current Cable

(example) Wiring outside

AHU

Free AI13 (sw

conﬁgurable) 0-10VDC KLM 4x0.8

Free AI14 (sw

conﬁgurable) 0-10VDC KLM 4x0.8

Free AI15 (sw

conﬁgurable) 0-10VDC KLM 4x0.8

Free AI16 (sw

conﬁgurable) 0-10VDC KLM 4x0.8

Analog Outputs AO

Control voltage for cooling /

Control voltage for additional

after heater (MDX-E/HP-E/HP-W)

AO3 0-10VDC 10mA KLM 2x0.8 Yes, except built in

heater

Control voltage for heating /

Control voltage for compressor

power (MDX/HP)

AO5 0-10VDC 10mA KLM 2x0.8 Yes, if MDX or

hydronic heating

Control voltage for preheater

/ Control voltage for precooler

(CHG) / Control voltage for HRW

#2 (Twin Tropic)

AO6 0-10VDC 10mA KLM 2x0.8 Yes, CHG

Control voltage for extract air

preheater (HP) / Control voltage

for extract air dehumidiﬁcation

(TCG) / Control voltage for HRC

defrosting (WGHR)

AO7 0-10VDC 10mA KLM 2x0.8 Yes, if duct heater

Control voltage for hot water

production AO8 0-10VDC 10mA KLM 2x0.8 Yes

Digital inputs DI Connected to poten-

tial free NO contact

Emergency stop DI1 (ﬁxed) 24VDC KLM 2x0.8 Yes

PDS10 supply fan pressure

switch / Defrosting indication

(MDX/HP)

DI2 (user

conﬁgurable) 24VDC KLM 2x0.8 Yes, MDX

Additional time (oﬃce mode

only) DI3 (user