Gas Type Conversion - Bosch Greenstar FS Series Installation And Maintenance Instructions For Contractors

Gas type conversion

Service function A.b: Display DHW temperature
This service function allows displaying the current DHW temperature.
Service function A.C: Display DHW tank temperature
This service function allows displaying the temperature of the DHW tank
temperature sensor.
Service function b.F: Solar DHW back-up heating delay (only combi
boiler KWB..-3A)
For systems with a solar thermal DHW tank in series before the DHW line
of the combi boiler. DHW heating by the boiler will be suppressed
expecting that solar thermal DHW will reach the hot water temperature
sensor prior eliminating the need to run the boiler. Set the heating delay
in accordance with system conditions.
If this setting is enabled, the DHW demand signal is no longer available
 Section 67.
The start delay can be set between 00 to 50 (0 to 50 seconds) in
increments of 1 second.
Default setting is 00.
Service function C.d: Display current heat demand
Available displays are:
• 00: No heat demand
• 01: Space heating demand present
• 02: DHW heat demand present
12 Gas type conversion
DANGER:
Personal injury and property damage
▶ This conversion shall only be performed by a trained and certified
installer in accordance with the manufacturer's instructions and all
applicable codes and requirements of the authority having
jurisdiction.
▶ If the information in these instructions is not followed exactly, or the
installation, adjustment, modification, operation or maintenance is
carried out by an unqualified person, a fire, explosion or generation
of large amounts of carbon monoxide may result in property damage,
personal injury or loss of life.
▶ Before carrying out electrical work: disconnect the installation from
the power supply at the emergency shutoff switch or by disengaging
the heating system circuit breaker. Take measures to prevent
accidental reconnection.
▶ The installer is responsible for the proper conversion of this
appliance.
▶ The conversion is not complete until the operation of the converted
appliance is checked as specified in these instructions.
Adjustment to different flue systems using throttle discs or baffles is not
necessary.
NG
• Appliances are set at the factory to Wobbe index 1,333 BTU/ft
3
(49.6 MJ/m ) at 60 °F (15 °C), 30" Hg (1016 hPa) and 7.0" W.C.
(17.4 mbar) gas supply pressure and sealed.
Converting to a different gas type
62
DANGER:
Explosion!
▶ Close the gas cock prior to working on the gas train.
▶ Check for gas leaks after working on the gas train.
A gas conversion kit is included in the scope of delivery.
▶ Swing the Heatronic boiler control to the left.
▶ Check the number on the code plug from the gas conversion kit:
Appliance NG Code plug
Order number
KBR16-3A 8 714 432 501 0
KBR21-3A 8 714 432 528 0
KBR28-3A 8 714 432 502 0
KBR35-3A 8 714 432 503 0
KBR42-3A 8 714 432 504 0
KWB28-3A 8 714 432 520 0
KWB35-3A 8 714 432 524 0
KWB42-3A 8 714 432 500 0
▶ Replace the code plug in the Heatronic with the code plug from the
gas conversion kit.
Fig. 71 Replacing the code plug
1. Loosen the pipe connection
2. Loosen the gas/air premix chamber
3. Remove the gas pipe with the premix chamber
3
LPG Code plug & fixed gas throttle
Order number
8 714 432 506 0
8 714 432 529 0
8 714 432 507 0
8 714 432 508 0
8 714 432 509 0
8 714 432 521 0
8 714 432 525 0
8 714 432 505 0
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
Ø
3.8
4.9
4.9
5.6
5.6
4.9
5.6
5.6
6 720 641 933-57.1O