Completion of Commissioning
Note:
Operating with a lower heating flow temperature will
result in the appliance operating in the much more efficient
condensing mode. To ensure that the rooms are properly heated
the radiators must be sized accordingly.
Switch off the appliance.
Disconnect the pressure gauge at the gas valve and tighten the
test point screw. Check for gas soundness around the screw. See
Fig. 18.
Refit the front cabinet.
If the appliance is to be passed over to the user immediately
then refer to Section 14.
If there is any possibility of the appliance being left inoperative
for very long periods in very frosty weather then drain the
appliance and the system. Turn off the gas and electricity
supplies.
Instruct the user in the efficient and safe operation of the
appliance and hand over the user’s leaflet.
Describe the operation and function of the controls. Set the
appliance and external controls to the user’s requirements.
Show the user how to vent the radiators.
Tell the user of the system pressure which must be maintained.
Tell the user what to do if the appliance is not to be used in frosty
conditions.
Advise the user of the importance of regular (annual) servicing to
maintain the efficiency and extend the life of the appliance.
Worcester Heat Systems will be pleased to offer a service
contract.
It is the law that any service work is carried-out by competent
engineers such as British Gas or CORGI registered engineers.
Pre-Service Inspection
Check that the flue terminal (and terminal guard) are clear and
undamaged.
If the appliance is in a cupboard/compartment check that the
specified service spaces are clear. Refer to Fig.2 and 3.
Check the connections in the system and remake any which
show signs of leakage. Refill, vent and repressurise the system
after this work. Do not forget to refill the condensate trap and
syphon.
Operate the appliance and system and take note of any action
which needs to be taken.
NOTE: If the mains elecricity is turned off then the siphon
check procedure will take place when it is re-established.
Refer to Section 13 Commissioning.
To disable the siphon check procedure follow the following
instructions.
The siphon check programme will run automatically if:
a)
Power is applied or re-applied to the boiler.
b)
The boiler has not run for a period of 48 hours.
c)
At a change from Summer to Winter operation and
vice versa.
The siphon check is operating when there is
on the display.
The check comprises operation for 15 minutes at minimum rate.
To Disable the Siphon Check:
1. Set the CH temperature control to E. Refer to Fig.S1.
2. Press the Setting and Service buttons and hold until
appears on the display. Refer to Fig.S1.
15. Inspection and Servicing
14. Instructions For The User
21
Fig. 18. Gas valve.
Inlet Pressure
Test Point
Seal
Locknut
Air
Distributor
Seal
Gas
Valve
Gas Valve
Solenoids
Inner Case
Base
Fig. S1..
Summary of Contents for Greenstar ZWBR 11-25 A31
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