Version: 1.00, 01-01-2015
Software version 1.40.05
Installation instruction
CTS 700 by Nilan
Comfort CT300
Comfort CT300 Polar
Table of contents
Table of contents ............................................................................................................................ 2
Figure table .................................................................................................................................... 2
Introduction ..................................................................................................................................... 3
Power supply .................................................................................................................................. 4
Assembly of Comfort ...................................................................................................................... 5
Condensation drain / water seal ..................................................................................................... 6
Ducting ........................................................................................................................................... 8
Heating surface, water .................................................................................................................... 9
Technical specifications, heating surface, water ........................................................................ 10
Heating surface, electrical (retrofitting) .......................................................................................... 11
Heating surface, electrical (retrofitting) ......................................................................................... 12
Filter change Comfort CT300........................................................................................................ 13
System dimensions ...................................................................................................................... 14
Accessories/spare parts ............................................................................................................... 15
Figure table
Figure 1: CTS 700 control ............................................................................................................... 4
Figure 2: Mounting the Comfort unit................................................................................................ 5
Figure 3: Installation of water trap ................................................................................................... 7
Figure 4: Insulation of ducting ......................................................................................................... 8
Figure 5: Connecting the heating surface, suggestion .................................................................... 9
Figure 6: Filter change .................................................................................................................. 13
Figure 7: System dimensions for Comfort CT300 ......................................................................... 14
Nilan reserves the right to alter these instructions without prior notice Page 3 af 15
Introduction
Please control that the following documents have been delivered together with the unit:
- Directions for assembly & use (this document)
- CTS 700 user guide
- Electrical chart
Should you have any questions on how to operate the system, contact your nearest Nilan dealer,
who you can find at www.nilan.dk/dealers
The purpose of this instruction manual is to offer the installation contractor and the user instructions on correct installation and maintenance of the Comfort system.
Comfort is a ventilation unit with heat recovery. The unit can yield up to 400m3/h at 100Pa external
back pressures. The energy in the exhaust air is being transferred to the inlet air.
The system is prepared for retrofitting of a post-heating element (electricity or water) for supply
heating of the inlet air. The post-heating element is controlled via CTS 700.
The unit is delivered with a G4 filter. In addition to this the unit can be equipped with different accessories e.g. hygrostat and filter box with pollen filter.
The plant has to be started immediately after installation and connection to the canal system.
When a ventilation plant is not running, the moist air from the rooms will be able to penetrate into
the channels and systems and allocate condensation. Condensation can run out of the valves and
damage furniture and floors. Condensed water in the plant may damage the electronics and the
fans.
Operating the unit is done with the CTS 700 control. The control has many functions such as menu
based attendance, week programme, time controlled filter guard and adjustment of the velocity of
the ventilator. (Directions for the CTS 700 control is described in another document delivered with
the unit.)
Comfort is delivered tested and ready for use. Installation and start-up must be carried out by an
authorized electrician.
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Power supply
Power supply including safety switch must be installed by an authorized electrician.
The Comfort-unit must be connected according to the attached electrical chart.
The unit is delivered with 3 m test cable for the CTS 700 panel. The panel should be connected to
the CTS 700 control in the unit with cable type cat 5e twisted in pairs. (Maximum length 20m).
The CTS 700 panel must be placed dry and frost-proof. The panels’ integrated feeler prevents further cooling of the building if the primary heat-supply stops by stopping the ventilation if the panel
feeler gets below a specific value. (Factory setting is 10°C; the value can be set from 1-20°C.)
Figure 1: CTS 700 control
If a water heating element is installed in the system, the regulation vent must be connected electrically as described in the enclosed wiring diagrams.
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Assembly of Comfort
When mounting the Comfort-unit future service and maintenance should be considered.
For the Comfort CT300 a free place of minimum 60 cm in front of the system and 20 cm
below the system is recommended. The CT300 can be mounted directly on the wall.
In order to ease the mounting each of the connection pieces is labeled. Please notice the labels.
The connection between the unit and the ducting should be a flexible transition.
The system must be level because of the condense outlet. The condense outlet requires a minimum clearance height of 11,5 cm beneath the outlet connection.
The exchanger is low-noise and low-vibration. However, potential vibrations spreading from the
system to the individual building parts must be taken into account. To detach the system from the
floor, we recommend that the system is placed on vibration absorbers. The vibration absorbers
must be placed diagonally on each corner to ensure that the system does not “fall down” from
them.
It is not necessary to re-insulate the system as it is delivered with a 20 mm standard insulation.
1 cm
Comfort
Top
4
∼
Comfort
300/450/ 600
vibration absorbers
Figure 2: Mounting the Comfort unit
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Condensation drain / water seal
The Comfort unit is delivered with a 20mm condensation drain. (PVC, GF-fittings). The drain is
placed under the discharge.
The condensation drain should be carried with an even inclination of at least 1cm per
metre, frost-proof to the nearest outlet. The overflow from the safety valve should also be
carried to the nearest outlet.
To avoid frost problems it can be necessary to supply the condensation drain with a
heating cable. It is the plumbers’ responsibility to secure the drain. (See Accessories)
When the system is running, there can be a vacuum of up to 500Pa (corresponding to 50mm water
column) in the outlet. For this reason, the difference in height in the water seal must be minimum
50mm. This means that the first bend of the water seal must be at least twice as long in order for
the system to be able to dispose of the condense water (see figure 3).
The condensation drain must be airproof from the unit to the water seal in order for the condensation water to be let away from the unit. If the condensation drain is not airproof false air will be
sucked in to the unit and the water will stay inside the unit.
The water seal can dry out and avoid the water from running out of the unit. Therefore the water
seal should be tested regularly and refilled with water if necessary. An elevated height of the water
seal will reduce the need for refilling with water.
Ø20 mm drain
Unit
5 cm
5 cm
11,5 cm
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3°
Figure 3: Installation of water trap
After the installation of the water trap, the operation can be tested in the following manner (the unit must be connected to the canal system and the front door of the unit must
be closed):
Fill the condensate tray with water and start the unit on the highest fan speed. Let the
system run for a few minutes. Make sure that there is no water in the condensate tray
when the test is completed.
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Ducting
We recommend that there are used ducts and fittings with rubber packing that meet sealing class
B and that the connections between the unit and the ducting are made with 1 meter sound absorbing flexible transitions as regards sound reduction.
The ducts should be shortened with a hacksaw or an angle grinder and laid out according to the
working drawing. The ducts are typically laid out on the main beam of the truss frame and are secured with hole belts or they are being hanged in assembly belts. Please avoid any unnecessary
area reductions and breaks of the ducting.
The ducts should be insulated – in some cases with the ordinary attic-insulation. All ducts should
be insulated with mineral wool to avoid heat loss and condensation. This also applies for flexible
transitions. If the ducts are laid out in an unheated room it will cause condensation problems if the
unit are turned off for a longer period of time as the hot air from the heated room will rise to the
ducts and cause condensation which can cause damp problems.
Figure 4: Insulation of ducting
The discharge duct leads the exhaust air (from which the system has recovered the energy it contained) to the outside through the roof or outer wall. It is important that the roof stack or wall grille
has at least the same area as the duct immediately ahead of the stack or grille. Any contraction will
cause unnecessary pressure drop, which may reduce ventilation capacity.
The holes for the inlet- and exhaust valves should be cut according to the mounting-frame for the
prescribed valve. The frame for the valve must be secured with screws before placing the valve in
the frame. The valves are placed in accordance with the size, construction and use of the room. As
an example we would not recommend placing an inlet valve just above people with sedentary work
because the inlet air in some cases would be experienced as a draught.
Loft insulation
material
Duct
Granulate
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Heating surface, water
Connecting the heating surface must be done by an authorized plumber.
Heating surface for Comfort CT300 is a surface that should be installed in the ducting.
The heating unit is delivered as accessory and consists of heating surface with temperature sensor
T9 and frost-protection B3, actuator and regulating valve.
The heating surface should be connected, scavenged and checked for any leakages before start-
ing the unit.
The dirt-catcher should be checked and cleaned after a thoroughly flushing of the system.
Air flow
Flow
Return
B3
T9
2
1
M
Heating surface
3
Note that the temperature sensor T9 and frost-protection B3 is placed at the heated side of the heating
surface close to the return connection. See electrical chart.
1:
Actuator and regulating valve:
Danfoss AME 140/24V 0-10V signal, 2-way valve VZ2 Kvs 0,4, (Nilan delivery) Kvs-value must be
checked in accordance with supply.
Differential pressure: 0,1 – 0,6 bar
There is calculated with a cooling of 20°C over the heating surface at a flow of 60°C.
2:
Scavenging (not Nilan delivery)
3:
Dirt-catcher (not Nilan delivery)
Figure 5: Connecting the heating surface, suggestion
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IMPORTANT regarding Danfoss Actuator type AME 140:
Re-installing the actuator must be done as described below:
1. Disconnect the power supply and remove the cover of the actuator.
2. Liberate the gear by pressing down the button as the spindle is turned up (counter clockwise)
3. Re-install the actuator and turn on power.
4. DIP-switch nr. 1 should be moved to ON and then to OFF.
5. The actuator is automatically calibrating for up to 6 minutes.
(The LED is flashing when calibrating and is lit constantly when finished).
6. Re-install the cover of the actuator.
The actuator should be placed in an environment of 0°C to 55°C.
Technical specifications, heating surface, water
Connections: 15mm Cu-pipes for flow and return.
Maximum output for Comfort CT300 is 2,0kW at a waterflow of 0,09m3/h, a pressure drop of1,9kPa
at the waterside and a flow temperature of 60°C. Pressure tested to13,5Bar..
See electrical chart.
Electrical heating surface should be installed in the ducting (Ø160/Ø200). When retrofitting an electrical heating surface it should be activated in the CTS 700 control panel as described in the user
guide
T7 placed after reheating surface.
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Heating surface, electrical (retrofitting)
Electrical heating surface should be installed in the ducting. When retrofitting an electrical heating
surface it should be activated in the CTS 700 control panel as described on page 15.
Power supply must be installed by an authorized electrician.
See electrical chart for the ventilation unit.
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Heating surface, electrical (retrofitting)
The heating surface should be installed in the inlet duct immediately after the unit.
There should be a safety distance of minimum 150mm from the heating surface to any flammable
materials. The heating surface must be insulated with a fire resistant material. However the electrical box may not be insulated. (Important: instructions from the manufacturer of the heating surface
must be followed).
See electrical chart.
The heating coil is fitted with temperature limiter and safety thermostat state. Here is short-circuited
terminals 3 & 4 of CN6. When installing other hot surfaces should be thought carefully about the
safety of these. Heating coil must be equipped with temperature limiter and safety thermostat.
CV
230 VSignal for overheatning
Unit
Intet
T7
The heating surface must be activated in the CTS 700 control panel.
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Filter change Comfort CT300
Outdoor- and extract air filters are placed behind the top lid on the front of the system.
The filters are changed when needed (see section about accessories). CTS 700 control has a time
based filter monitor, which indicates filter change after a set time.
Before filter change the system is turned off. Screws are loosened and the lid is removed. The filters can be removed without using tools.
Figure 6: Filter change
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System dimensions
Figure 7: System dimensions for Comfort CT300
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Accessories/spare parts
Filters
Type
System type
Qty
Nilan item no.
Insulated pollen filter unit with F7 filter, for
fitting in inlet duct (Ø160)
1
8527
Pollen filter for fitting
Comfort CT 300
1
3987
Pollen filter for fitting
Comfort CT 300
1
3885
Filter G4 (1set = 2stk.)
Comfort CT 300
3939001
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