Atag iSteel 120, Руководство по установке

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COMMISSIONING SERVICING
FILLING
Check all connections for water tightness including any factory made connections such as the temperature and pressure
relief valve. The pressure in the expansion vessel should be checked to ensure it is 3 bar (45PSI). The valve is of the car
tyre (Schrader) type.
The hot tap furthest away from the iSteel should be opened before filling the system to let air out.
The system should be flushed before use. The remaining taps should be opened in turn to expel air.
DIRECT UNITS
The system must be fully filled and flushed before switching on the power to the immersion heaters and allowing the
unit to heat up. The immersion heater is supplied pre-set at 55°C. Turning fully to + sets to approx. 65°C.
INDIRECT UNITS
Ensure the lever on the two port valve is set to the filling position and use the boiler manufacturers commissioning
instructions to fill the primary circuit. When full release the lever. Switch the programmer to Domestic Hot water (DHW)
and allow the unit to start to heat. Adjust the dial of the dual thermostat to between 55°C and 65°C as required.
STORAGE TEMPERATURE
A storage temperature of 60-65°C is normal for both direct and indirect iSteel. In hard water areas consideration should
be given to reducing this to 55-60°C. In many healthcare applications the guidance on Legionella control and safe water
delivery temperatures will require storing the water at 60-65°C, distributing at 50-55°C and using thermostatic mixing
valves to control the final temperature. For details consult the NHS estates guidance on safe hot water temperatures.
SAFETY VALVE CHECKS
Any water coming from either the expansion relief valve or the temperature / pressure relief valve during heat up is
indicative of a problem which needs to be identified and rectified. The temperature relief and expansion relief valves
should be fully opened, one at a time then both together allowing as much water as possible to flow through the tundish.
Check that your discharge pipework is free from debris and is carrying the water away without spillage over the tundish
and release the valves and check that they re-seat properly.
GENERAL
Servicing should only be carried out by competent installers and any spare parts used must be purchased from ATAG
Heating Technology UK Ltd. NEVER bypass any safety devices or operate the unit without them fully operational.
DRAINING
Isolate from the electrical supply to prevent the immersion heaters burning out. Isolate the unit from the cold mains.
Attach a hose to the draining tap ensuring it reaches to a level below the unit (This will ensure an efficient syphon is set
up and the maximum amount of water is drained from the unit). Open the hot tap closest to the unit and open the
draining tap.
WARNING: WATER DRAINED OFF MAY BE VERY HOT!
ANNUAL SERVICING
A competent installer should carry out the following checks on an annual basis, ideally at the same time as the annual
boiler service.
1. The expansion relief valve on the inlet control set should be eased open allowing water to flow for 5 seconds. The
valve should then be closed making sure it resets correctly. Repeat this procedure with the pressure / temperature
relief valve. Always insure that the discharge pipework is allowing the water to drain away adequately. If not check
for blockages etc. and clear.
WARNING: THE WATER DISCHARGED MAY BE VERY HOT!
2. Ensure that any immersion heaters that are fitted are working correctly and that they are controlling the water at
a temperature of between 55°C and 65°C.
3. Make sure the pressure in the expansion vessel is charged to 3 bar. Turn off the water supply to the unit and open
a hot tap first. The valve on the expansion vessel is a Schrader (standard car tyre) type. Air or CO2 can be used to
re-pressurise the expansion vessel.
4. Remove the head on the inlet control set by unscrewing, and clean the mesh filter within.
5. The benchmark service record supplied within this manual should be updated at each service.
YOUR GUARANTEE MAY BE VOID WITHOUT PROOF OF ANNUAL SERVICING. THE COMMISSIONING CERTIFICATE
SUPPLIED AT THE REAR OF THIS MANUAL SHOULD ALSO BE COMPLETED BY THE INSTALLER.