Commissioning; Convert Boiler To Low Nox - Worcester GREENSTAR 24i Junior Installation Instructions Manual

COMMISSIONING

5 COMMISSIONING
5.1

CONVERT BOILER TO LOW NOx

NOTICE: Low NOx
B The Low NOx performance is achieved
just by changing the code plug.
No setting need to be made.
The boiler can be converted to a "Low NOx" version.
The "Low NOx" specifications can be found in the
Technical Data on page 7.
The setting are only applicable to the central heating
function of the boiler.
CAUTION:
B ISOLATE THE MAINS ELECTRICAL
SUPPLY BEFORE STARTING ANY WORK
AND OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS.
The Greenstar i Junior combi boiler range require a new
code plug to convert them to low NOx variants.
Each conversion kit is specific to the boiler size, refer to
the table below.
Boiler type Gas type
24kW i junior kit
28kW i junior kit
Tab. 21 Code plug number
ACCESS TO CODE PLUG
B Remove boiler casing to access control panel.
1. Remove the screw securing the control panel.
2. Lower the control panel into the horizontal service
position.
1. Referring to figure 53, unscrew the three screws in
the control panel.
2. Remove the connections cover.
1.
Fig. 53 Removing the connection cover
36
Code plug no.
NG 1130
NG 1131
1.
2.
1.
ST10
ST18
Fig. 54 Connector locations
B Identify ST18, the code plug and connector.
2.
ST18
Fig. 55 Remove and replace the code plug
1. Refer to figure 55 and remove the code plug from the
controller, cut the tie securing the plug to the boiler
chassis and discarded the plug and tie.
2. The new code plug, tie and low NOx labels are found
in a plastic bag attached to the left hand side wall of
the boiler under the control panel.
Fit the code plug from the kit, making sure that code
plug is secured to the boiler chassis with the new tie.
B Confirm that the number on the code plug
corresponds to the boiler type in table 21.
B Replace the control panel cover.
B Move the control panel into the operational position
and secure.
B Replace the boiler casing.
UPDATE DATA LABEL
The data label is located on the right-hand inside wall of
the boiler, refer to item 1 of figure 57.
B The data label must be updated to show the "Low
NOx" variant data, peel off the larger portion of the
green label and apply over the original data label.
B The boiler must be identified as a "Low NOx" variant,
peel off the smaller portion of the green label and
apply to the bottom, right corner of the fascia.
6 720 644 741a (2010/10)
ST6
ST8
ST15
ST17
1.
6720645222-10.1Wo