Water Systems & Pipework - Worcester GREENSTAR 12Ri Instruction Manual

8
WATER SYSTEMS & PIPEWORK
WATER SYSTEMS & PIPEWORK
PLASTIC PI PEWOR K & U N DE R FLOOR
HEATING:
• Any plastic pipework must have a polymeric
• Plastic pipework used for underfloor heating
CONNECTIONS/VALVES:
• All system connections, taps and mixing
• Radiator valves should conform to
• All other valves should conform to BS1010.
• On new installations TRV's must be used on
• A drain cock is required at the lowest point
• An air vent is required at the highest point on
S and Y PLAN SYSTEM:
NOTE: Generally a bypass is not necessary
A Static Head - Minimum static head 250mm
measured from the highest point in the heating
system (top surface of the appliance or highest
point in the heating system) to the water level in
the feed and expansion tank.
B Heating Vent (22mm minimum)
C Primary Cold Feed (15mm minimum)
D Diverter Valve and Zone Valves
E Pump, max power 90 Watts
F Automatic Bypass
G Radiator Valve (Flow)
H Lockshield Valve (Return)
NOTE: A drain cock should be fitted at the
FULLY PUMPED SEALED SYSTEM:
• The CH sealed system must be filled using a
• Do not use galvanised pipes or radiators.
I Expansion Vessel
J Pressure Gauge
K 3 Bar Pressure Relief Valve
L Stop Valve Fixed Cylinder Type or sealed
NOTE: A drain cock should be fitted at the
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR Ri
barrier with 600mm (minimum) length of
copper pipe connected to the boiler.
must be correctly controlled with a
thermostatic blending valve limiting the
temperature of the circuits to approx. 50°C.
valves must be capable of sustaining a
pressure up to 3 bar.
BS2767:10.
all radiators except where a room thermostat
is sited. On all installations TRV's should at
least be fitted in the sleeping areas. See note
below on open radiator/bypass
on the system.
the system.
on a Y plan system as one of the
ports is open to flow.
lowest point of the heating circuit
and beneath the appliance.
WRAS approved filling loop or comply with
the diagram opposite for System fill
systems approved connection
lowest point of the heating circuit
and beneath the appliance.
8 716 115 168a (06/2008)