Boiler Connections - Worcester GREENSTAR 24i Junior Installation, Commissioning And Servicing Instructions

INSTALLATION
1.
3.
Fig. 26 Outer case screw removal
4.4

BOILER CONNECTIONS

CAUTION: ISOLATE THE MAINS GAS SUPPLY BEFORE
STARTING ANY WORK AND OBSERVE ALL RELEVANT
SAFETY PRECAUTIONS.
GAS, WATER AND CONDENSATE CONNECTIONS
▶ Remove wall mounting template and secure the wall mounting frame
to the wall with the appropriate fixings for the boiler weight and wall
type.
▶ System pipes may be run vertically upwards behind the boiler or
below it. See Plumbing Manifold Section on page 15.
1. CH flow (22mm),
2. DHW outlet (15mm)
3. Gas inlet (22mm),
4. Domestic Cold Water inlet (15mm),
5. CH return (22mm),
FITTING THE CONDENSATE PIPE WORK
Pre-fit the plastic condensate drain pipe through the wall frame as
shown in the example below.
1. Secure the pipe to the wall at the last joint.
2. Ensure the pipe protrudes through the wall frame by 25mm.
▶ If exiting through the wall, to run externally, the pipe must have a 3°
fall and be increased to a 32mm insulated pipe.
25mm
Fig. 27 Condensate drain pipe work detail
22
5
2.
1
2
PREPARING THE WALLFRAME
If using the optional filling loop: 7 716 192 281 (not supplied with the
boiler) fit it before hanging the boiler on the wall frame.
The bonded washer supplied is for the Gas connection
only.
▶ Fit sealing washers to service valves before hanging boiler.
1.
2.
3.
Fig. 28 Sealing washers
NOTICE: Before hanging the boiler onto the wall
mounting frame ensure that the pressure relief valve
connection is in the DOWN position.
This is located on the right hand side of the wall frame at
the rear.
Apply a smear of silicone lubricant to the seal to ease
connection later.
1. Pull the extended lever forward and down until there is no further
travel.
Fig. 29 PRV connection in the down position
4.
5.
1.
6 720 802 047 (2013/05)