enervent eWind LTR-2, Installation Instruction

Page: 14 / 96

14
To install:
1. Prepare the 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
ceiling’s vapor barrier using for example duct tape.
4. Attach the ducts to the ceiling installation plate
with rivets.
•
Make sure that there are no gaps between the
insulation and the ducts.
• 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 manual.
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:
• In a standard delivery, a separate pump is used
(Option 1).
• Alternatively, the brine is circulated through the
geothermal pump (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.
Detailed principal charts are found at the end of this
manual.
Option 1 (standard)
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 DO8.
• A 3-way control valve (Belimo R3) needed for
cooling.
• An actuator (Belimo TR24-SR).
The temperature is controlled using the ventilation
unit’s own automatic control. The ventilation unit
controls the circulation pump and the 3-way valve.The
heat pump is not started up for ventilation cooling.
To install:
1. Install the cooling coil in the supply air duct (in
case of a duct coil).
2. Connect the condense water outlet.
3. Build a separate pump group with valve and
actuator for circulating cool brine adjacent to the
ventilation unit cooling coil.
4. 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 the open position, the actuator is turned
counter-clockwise before connecting, and
when the valve is closed, the actuator is turned
clockwise before connecting. Figure 1 on page
15 shows the valve and markings on valve
spindle in valve open (cooling/heating on max)
position.
5. 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.
Option 2
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 DO8.
• A 3-way control valve (Termomix D32S) needed for
cooling.
• An actuator (Belimo NRYD24-SR-W + installation
set MS-NRE).
The temperature is controlled using the ventilation
unit’s own automatic control. The ventilation unit
controls the geothermal heat pump and the 3-way
valve.
To install:
1. Install the cooling coil horizontally in the supply air
duct (in case of a duct coil).
2. Isolate a separate loop for the cooling coil.
• Make sure to include the one-way valve.
• Follow the principal chart at the end of this
manual.
3. Connect the condense water outlet.
4. Install the 3-way valve and the actuator in the
ground collector’s piping.