Worcester 27i System Compact User Manual

APPLIANCE INFORMATION
Greenstar i System Compact - 6 720 807 726 (2013/05)8
1 Wall mounting frame 26 Fan
2 Expansion vessel 27 Flow temperature sensor (NTC)
3 CH return isolator 28 Electrode assembly
4 Gas inlet isolator 29 Maximum safety sensor NTC
5 CH flow isolator 30 Auto air vent
6Condensate connection 31 Aluminium Silicon Heat exchanger
7 Flue connector 32 Flueway
8 Flue overheat thermostat 33 Sump assembly
9 Main superstructure 34 Pressure gauge connection point
10 Case 35 Diverter valve actuator blank
11 Case retaining screws 36 Diverter valve body
12 Bottom panel 37 Modulating pump
13 Case retaining clips 38 Drain point
14 Control, top panel 39 CH return connection to service valve
15 Menu buttons 40 PRV
16 Blank for optional programmer 41 Gas connection to service valve
17 Diagnostic port (for Worcester service engineers) 42 CH flow connection to service valve
18 Pressure gauge 43 Condensate discharge pipe
19 DHW temperature control* 44 Siphon
20 Boiler identification label 45 Expansion vessel connection point
21 Operation/fault diagnostic light (blue) 46 Return temperature sensor (NTC)
22 Control panel flap 47 Gas valve
23 Boiler fascia guide location 48 Combustion air inlet
24 CH temperature control 49 Ignition transformer
25 Boiler display
Table 4 Boiler components
* DHW temperature control.
The optional Integral Diverter Valve kit with cylinder sensor is required to enable the hot water temperature control to be used.
The table below lists:
▶ the accessories that can be fitted when the integral diverter valve is fitted.
▶ with which accessory the DHW control is operational
DHW control operational
Accessory Integral diverter valve External diverter valve
DT10RF Digital programmable room thermostat YES N/A
DT10RF Optimiser Digital programmable room thermostat YES N/A
DT20 Twin channel digital programmer YES N/A
DT20RF Digital RF thermostat with twin channel programmer YES N/A
FR110 Programmable room thermostat NO N/A
FW100 weather compensation controller NO N/A
The FR110 and FW100 assume control over the DHW set point temperature control, making the manual DHW temperature control
inoperative.
Worcester fascia mounted mechanical timers cannot be used with this appliance.

Worcester 27i System Compact Specifications

General

Brand	Worcester
Model	27i System Compact
Category	Boiler
Language	English