Servitec - Model 30 -Self Optimizing Vacuum Spray Deaeration Make-up Unit
Vacuum spray degassing unit with integrated automatic refill for closed heating or chilled water circuits which are equipped with pressurization units as well as installations with static precharged expansion vessels. Active and central degassing of the installation according to the principle of vacuum degassing.
Unit for wall mount existing of a hydraulic part and a Reflex Control Basic operating unit. The entire unit is protected against dirt intrusion by
means of a housing made of expanded polypropylene with a removable hood for maintenance access.
It is featuring an "auto-setup" function including a selfoptimizing operation. The deaerator eliminates entirely the free gases in the installation and withdraws up to 90% of the dissolved gases of the installation water.
The vacuum degassing of a partial flow of the installation water is processed according to an optimised time schedule with selectable degassing programmes. After a period of continuous degassing (adjustable and depending on the installation volume) at the start up, the control switches automatically to an economic mode (interval degassing).
The hydraulic part is standard provided with a discharge and with isolating lockshield ball valves on all connection pipes. Both the inlet line equipped with a strainer and the supply for the integrated automatic water make-up are connected to a three-way electrically actuated fail safe ball valve. Possibility to connect the make-up supply to the water mains or to a break tank (eventually also for glycol mixture make-up). The vacuum spray chamber is part of the stainless steel pump body.
The multistage pump discharge is connected to a modulating electrically actuated ball valve with position opti misation through the microprocessor control.
The Reflex Control Basic is integrated in a sturdy pre wired plastic cabinet which has IP 54 protection class and in which all electric and electronic components are integrated. The control panel is consisting of a display and a membrane keyboard which is insensitive to dirt.
The Control Basic is a fully automatic freely programmable microprocessor control unit.On the two-line LCD screen, operation mode,failures and system pressure are indicated in plain text. (16 language display).
Also two function-LED indicate the unit to be in automatic mode and malfunction. The control features a parameter- and error memory. This way
it is possible to display in chronological order the last 20 error messages with indication of date and time.
The control as standard is provided with:
RS 485 Interface
for transfer of complete operation information to a BMS e.g. by use of a bus module or for data exchange between multiple Reflex control units
- a volt free output for common fault message.
- an input terminal for evaluation of a contact water meter pulse
The control is reading the system pressure via a pressure transducer. The degassing of a partial flow of the installation water is processed accor- ding to an optimised time schedule with selectable degassing programmes. After a period of continuous degassing
(adjustable and depending on the installation volume) at the start up, the control switches automatically to an economic mode (interval degassing).
When the water make-up is activated, error message will be triggered if the water make-up cycle goes over a time limit and/or if the number of make-up cycles is exceeded over a given period.
This will result in an error message in both cases and interruption.
In case the water supply line is fitted with a contact water meter, also the total added water volume is indicated on the display and an error message is activated in the event of overshooting the maximum make-up volume (added up). This is also the case when the established
input make-up quantity is exceeded against an input volume in one filling cycle, or if the make-up system because of malfunction lets water through without being activated by the control.
Documentation and monitoring of the connected HVAC-system with respect to the above-mentioned parameters.
Type: 30
- adm. excess oper. press.: 8 bar
- adm. operating temp.: 70 °C
- adm. ambient temp.: >0..35 °C
- sound level: < 55 dB(A)
- power supply: 230 V/ 50 Hz
- electr. power cons.: 0,75 kW
- electr. nominal curr.: 3 A
- depth x width x height (mm): 285/257/653
- empty weight: 13 kg
- connections pressure-side: G 1/2
- flow-off side: G 1/2
- make-up: G 1/2
- elimin. degree of dissolved gases: up to 90 %
- part. vol.flow netw. up to: 0,05 m³/h
- make-up volume flow up to: 0,025 m³/h
- min. flow press. make-up: 0,1 bar