Checking The Gas Rate; Gas Rating Test; Checking For Leaks During Operation; Domestic Hot Water - Benchmark 27i System Compact Installation, Commissioning And Servicing Instructions

COMMISSIONING

6.5.2 CHECKING THE GAS RATE

▶ The gas rate should be measured at the gas meter after the boiler has
been operating for a minimum of 10 minutes at maximum output.
▶ See Technical data section on page 8 of this manual for gas rates and
CO/CO ratios.
2
▶ Where a gas meter is not available (e.g. L.P.G.) the CO/CO
checked.

6.5.3 GAS RATING TEST

▶ Ensure all other gas appliances are isolated.
1. Set the boiler to maximum output by pressing
buttons together for at least 5 seconds.
The chimney sweep symbol (1) will be displayed at the top of the
screen and the word "Max" will flash at the bottom of the screen. The
boiler will ramp up to maximum output in 30 to 35 seconds.
≈
5 s
eco
°C
reset ok
°F
Max
1.
e
min max
Fig. 56 Setting boiler to maximum
▶ Ensure that the boiler has stabilised at maximum output.
▶ Carry out Gas rating procedures as described in "Essential Gas
Safety" third edition.
▶ If pressure and gas rate are satisfactory press the
and the boiler will return to normal operation.
– If left in the service mode the control will return to normal operation
after 15 minutes.
38
must be
2
and the
eco
2
1 1 3
0 bar 4
1
min max
°C
°F
Max
button again

6.5.4 CHECKING FOR LEAKS DURING OPERATION

▶ Use an approved leak detector to check all connections for possible
leaks. The product must be certified as a gas leak testing agent.
▶ Do not allow the product to come into contact with the electrical
wiring.
6.6

DOMESTIC HOT WATER

Controlling the hot water temperature:
NOTICE: Domestic Hot Water
▶ The hot water temperature can only be controlled
when the "Optional diverter valve" kit is fitted.
The hot water temperature can be set to between approximately 40°C
and 70°C using the DHW temperature control.
Greenstar i System Compact ErP - 6 720 813 280 (2015/07)