Pre-Installation; Cleaning Primary Systems - Worcester 29CDi Classic Installation, Commissioning And Servicing Instructions

PRE-INSTALLATION

Product data
Product type
Condensing boiler
Combination heater
Rated heat output
Seasonal space heating energy efficiency
Energy efficiency class
Useful heat output
At rated heat output and high temperature regime
At 30 % of rated heat output and low temperature
2)
regime
Useful efficiency
At rated heat output and high temperature regime
At 30 % of rated heat output and low temperature
2)
regime
Auxiliary electricity consumption
At full load
At part load
In standby mode
Other items
Standby heat loss
Emissions of nitrogen oxides
Sound power level, indoors
Additional data for combination heaters
Declared load profile
Daily electricity consumption
Annual electricity consumption
Daily fuel consumption
Annual fuel consumption
Water heating energy efficiency
Water heating energy efficiency class
Table 7 Product data for energy consumption
1) High temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
2) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
3 PRE-INSTALLATION
3.1

CLEANING PRIMARY SYSTEMS

NOTICE:
▶ All the following Pre-Installation sections must be
read and requirements met before starting boiler or
flue installations.
CAUTION:
▶ ISOLATE THE MAINS SUPPLIES BEFORE STARTING
ANY WORK AND OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS.
NOTICE:
▶ Debris from the system can damage the boiler and
reduce efficiency. Failure to comply with the
guidelines for the use of water treatment with the
appliance will invalidate the appliance guarantee.
10
Symbol Unit 7 738 100 252 7 738 100 253 7 738 100 246 7 738 100 247
– – 38CDi
Classic
– – Yes
– – Yes
P kW 30
rated

% 92
s
– – A
1)
P kW 30.0
4
P kW 10.0
1

1)
% 88.2
4

% 97.5
1
el kW 0.052
max
el kW 0.028
min
P kW 0.004
SB
P kW 0.048
stby
NOx mg/kWh 20
L dB(A) 55
WA
– – XL
Q kWh 0.171
elec
AEC kWh 38
Q kWh 22.388
fuel
AFC GJ 1,368

% 84
wh
– – A
BEFORE CLEANING THE SYSTEM:
▶ Ensure that the system and pipe work is in good working order.
▶ Where possible keep the existing boiler/circulating pump in
place when flushing the system.
FOLLOW THE GUIDANCE OF BS7593:
Treatment of water in domestic hot water central heating and also the
flushing guidelines below.
FLUSHING THE SYSTEM
▶ Fill the system with cold water and check for leaks.
▶ Open all drain cocks and drain the system.
▶ Close drain cocks and add a suitable flushing agent compatible with
aluminium at the correct strength for the system conditions in
accordance with the manufacturer's instructions.
The pH value of the system water must be less than 8 or the
appliance guarantee will be invalidated.
▶ Circulate the flushing agent before the boiler is fired up.
▶ Run the boiler/system at normal operating temperature as directed
by the manufacturer of the flushing agent.
38CDi 42CDi
ErP ErP
Classic LPG Classic
Yes Yes
Yes Yes
30 30
92 92
A A
30.0 30.0
10.0 10.0
88.2 88.2
97.5 97.5
0.052 0.052
0.028 0.028
0.004 0.004
0.048 0.048
20 20
55 55
XL XL
0.171 0.171
38 38
22.388 22.377
1,368 1,367
84 87
A A
NOTICE: ARTIFICIALLY SOFTENED WATER MUST NOT
BE USED TO FILL THE CENTRAL HEATING SYSTEM.
42CDi
ErP ErP
Classic LPG
Yes
Yes
30
92
A
30.0
10.0
88.2
97.5
0.052
0.028
0.004
0.048
20
55
XL
0.171
38
22.377
1,367
87
A
6 720 815 725 (2015/05)