Jaga OXYGEN Manuel utilisateur
Oxygen Technical Manual
Oxygen Description
Intelligent, healthy energy-efficient IAQ control
Jaga Oxygen is an energy-efficient, intelligent and fully programmable heating and ventilation solution
which creates a fresh, healthy and comfortable indoor climate in buildings of any age or type.
Particularly suited for rooms with high occupancy such as classrooms, offices and care homes, Oxygen
delivers clean, healthy, fresh air on demand and in a highly energy efficient way.
In schools, poor indoor air quality (IAQ) has long been an issue and has been proven to have a detrimental
effect on educational performance. Similarly in an office environment, good indoor climate is essential for
productivity and to reduce sickness and absenteeism. In care homes the need is even more acute as
poor IAQ, due to excess CO2, is a real threat to healthy living and occupants’ comfort.
How Does it Work?
The Oxygen system works by monitoring and measuring the air quality in a room and cutting in
automatically when required. This ensures that an adequate supply of fresh, clean outside air is
introduced into the room and the contaminated, stale air is removed.
As the Oxygen’s intelligent demand controlled (heating and) ventilation system only vents fresh air when
required it is more efficient than natural ventilation and eliminates the drawbacks of draughts, stuffiness
and security risks. During the hot summer months Oxygen’s boost function can be used to deliver effective
secure night-time air purging. This cools the building fabric down so that the environment is more
comfortable first thing in the morning.
The Oxygen system can be specified with a wide range of Jaga wall-mounted heating solutions. Oxygen
systems can be linked to an existing building management system, centrally controlled in a stand-alone
system, or even controlled simply through a panel on the radiator.
The system features Oxygen Refresh fans built into Jaga’s patented Low H2O radiators. The refresh unit
draws in outside air and filters it before discharging it through the radiator and into the space.
The Jaga Master controller regulates and balances inlet (and exhaust if installed) air. The exhaust unit
directs stale air outside or into central corridors to provide a degree of heat recovery. The Oxygen CO2
sensor controls the whole system, continuously measuring the air quality and reacting accordingly by
replacing stale air with fresh clean air. As the ventilation demand changes the Low H2O radiator is able
to respond instantly offering excellent fast response heating control.
The fresh air, depending on the requirements of the CO2 sensor, will vary from 30 m3/hr on 1.0 vdc output
from main oxygen control panel to 200 m3/hr on 4.5 vdc output from main oxygen control panel, which
will be boosted up to 400 m3/hr on 7.0 vdc output once the ‘BOOST’ button has been depressed on the
smart switch.
When using The Jaga Oxygen control system, remote access can provide real-time monitoring of room
conditions including, CO2, temperature and air volumes.
Also, with the ‘Cloud Service’ the current status can be monitored and changed remotely – ideal for
Facility Managers.
Oxygen Technical Manual
Installed Components
CO2 Sensor
CO2 Sensor communicates with the other control components over the Jaga bus system to control
and balance the inlet and exhaust fans.
This sensor also measures the room temperature and can control the heating valves and ventilation
speed to provide a degree of temperature control within the space.
Refresh Unit & Damper
The Oxygen air inlet fans are housed within the Jaga Low H2O radiator casing. Depending on the
type of casing being used, up to four air inlet fans can be fitted into one radiator, therefore saving
valuable wall space.
Each of the air inlet fans require a 163mm diameter feed to outside air and accommodate the damper
assembly. The damper closes when the fan is not operational to ensure full control.
Exhaust Fan
An exhaust fan is used to remove stale air from the space. It can accept a 0 – 10 volt signal. The
fan curve is programmed into the Jaga Master Controller to ensure accurate control, balanced with
the inlet air from the refresh units.
Oxygen Technical Manual
Room Smart Switch
A single 2-button switch can be installed in each room to provide a user interface with the system.
The indicator lights illuminate in different colours depending on the mode of operation.
Central Control Panel and Associated Components
The panel is located in a central location(comms room or plant room) and houses the master control
unit to communicate with all bus components.
The front of the panel has an isolator and smart switch for service and maintenance purposes.
Analogue Output Module 0..10vdc
Each refresh unit (maximum four refresh units) and exhaust fan/s, require an analogue output
module to convert the Green Wire BUS signal into a 0-10vdc control signal from the controller using
an inbuilt program by Jaga to configure their speed of running on the dictates of the CO2 sensor.
Oxygen Technical Manual
Display
A display is provided to give an indication to of the system conditions including settings, operating
speeds and CO2 levels.
Radiators and TRVs
The radiator design is to suit the requirements of the specification, and houses a low water content
heat emitter and valves.
The radiators are fitted with TRVs to control the water flow based on the space temperature. This
can be traditional manual type or electrically activated.
Oxygen Technical Manual
Refresh Unit Description
Type Of Units Available with Oxygen
Model
LowH2O
Standard
H min.
Low H2O
Twin
H min.
Length minimum
1 Unit 2 Units 3 Units 4 Units
Strada 500 650 800 1400 2400 2800
Maxi WT/WF N/A 740 1033 1433 2033 N/A
Maxi FT/FF N/A 740 1033 1433 2033 N/A
Guardian FT N/A 800 840 1440 N/A N/A
Guardian WT N/A 600 840 1440 N/A N/A
Tempo 500 600 800 1400 2400 2800
Play 650 650 1000 N/A N/A N/A
Oxygen Technical Manual
Performance Data
This shows the performance data, in graph form, of the Oxygen Refresh Unit showing Airflow (m3/hr)
and Noise Level (dBA) against Control Voltage (vdc).
All the tests have been taken on the Refresh Unit alone, without radiator casing.
0
10
20
30
40
50
60
70
80
0
50
100
150
200
250
300
350
400
450
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
NOISE LEVEL - DBA
AIR FLOW - M3/HR
CONTROL VOLTAGE
Voltage vs Airflow
Airflow m3/hr Noise LwA SRL Apr 2016
Oxygen Technical Manual
Fitting Instructions
Fit the element and brackets as their fitting instructions, then mount the template:
Mounting
template
REFRESH UNIT
OXRU.015
REFRESH UNIT
OXRU.015
Oxygen Technical Manual
Core drill through the wall from the marked out circle from the mounting template :
Wire the refresh unit as described in the wiring section.
Wiring of System
Oxygen Technical Manual
Typical Oxygen system layout –
Oxygen Technical Manual
Refresh Unit wiring -
Exhaust Fan –
Internal circuit board of Exhaust
Fan
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