Worcester Greenstar i Series

COMMISSIONING
6 720 804 532 (2012/09) 29
Fig. 57 Wiring centre
OPTIONAL EXTERNAL FROST STAT CONNECTION ST6:
Fig. 58 Frost Thermostat
▶ Connect frost thermostat cables to terminals F
S
& F
R
.
▶ These are not polarity sensitive.
▶ The external frost thermostat only operates the pump (see page 53
for internal frost protection).
5 COMMISSIONING
5.1 PRE-COMMISSIONING CHECKS
Check that the service and water pipes are connected to the correct
position on the manifold.
Fig. 59 Pipe fittings
Ensure that the washers have been fitted to the water connections and
the bonded washer to the gas connection on the manifold.
1. - CH Flow (22mm)
2. - Gas inlet (22mm)
3. - CH Return (22mm)
▶ Check the gas type specified on the identification plate (1), on the
inside of the flap, matches that of the gas supply.
Fig. 60 Identification plate
▶ Turn on the main gas supply, check the gas pipe work, connections
and rectify any leaks.
▶ Check that the discharge pipe (1) has been connected to the syphon
and condensate outlet pipe.
NOTICE:
▶ External diverter valve(s) and all other 230V parts are
not supplied with the boiler.
▶ A fascia mounted programmer/timer cannot be fitted
unless optional integral diverter valve is used.
▶ Refer to manufacturers‘ instructions when connecting
external parts to the wiring centre.
▶ Worcester, Bosch Group cannot be held responsible
for wiring errors.
▶ There is an option to fit an internal diverter valve. This
also requires fitting an extra harness and a code plug
change. See “Optional Diverter Valve” instructions
supplied with the integral diverter valve kit.
▶ Option Integral Diverter Valve kits:
12kW - 7 716 192 566
15kW - 7 716 192 567
18kW - 7 716 192 568
24kW - 7 716 192 409
6720644743-20.1Wo
L
N
S
N
L
SLR
N
blue
brown
green/yellow
live
switched live
neutral
E
ST10
230V
MAINS
SUPPLY
L
NE SWL
Wiring Centre/Junction Box
Frost Thermostat
FSFR NP LP
ST6
6720643895-43.1Wo
CAUTION: ISOLATE THE MAINS ELECTRICITY SUPPLY
BEFORE STARTING ANY WORK AND OBSERVE ALL
RELEVANT SAFETY PRECAUTIONS.
6720644743-11.3Wo
1.
2.
3.
1
6720804530-11.1Wo