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Page 26
Page 27
GULFSTREAM
2000
8. FINAL ADJUSTMENTS
COMMISSIONING
IMPORTANT:
Test nipple B is connected via a permanent sensing line to a nipple located in
the elbow below the air pipe inlet and it senses air inlet suction which is the
MINIMUM suction value.
Test nipple A is, when opened to atmosphere, under MAXIMUM suction.
When the nipples are connected correctly as described below the suction at B
is subtracted from the suction at A and will result in a negative suction reading
on the instrument.
Correct readings are as follows:-
1. Re-light the appliance and allow the
thermal store to heat to maximum. Check
for water leaks, turn the boiler off, drain
the system whilst hot.
2. If an in line water strainer, is fitted, it should
now be checked and cleaned if necessary.
The strainer is situated in the inlet to the
cold feed compression joint.
3. Refill the system and adjust to the system
fill pressure (1.2 bar). Check the pressure
gauge pointer is set to the system design
pressure. Check all air is vented from the
system.
4. Re-light the appliance and allow the
thermal store to heat to maximum.
5. To check the operation of the domestic
hot water supply, open a domestic hot
water tap and ensure that hot water is
satisfactory, i.e. the flow and temperature
are in accordance with TECHNICAL DATA.
Turn off the tap. To check the operation of
the central heating, ensure all the external
controls (should they be fitted) are calling
for heat, switch the time clock over-ride
switch to the ‘ON’ position. The central
heating pump will come on and distribute
the stored water around the central
heating system. The thermal store
temperature control may fire the boiler to
replenish the store. Balance the heating
circuits as normal practice. Switch the time
clock over-ride switch to ‘OFF’.
6. Set the time clock switch to the timed
position and check that the clock is set
at the desired time periods. Set the
room thermostat (if fitted) to the required
setting.
7. Instruct the User on the correct operation
of the appliance and any system controls
if fitted. Ensure the User is fully conversant
with all aspects of boiler and system
operation.
IMPORTANT:- THE USER MUST BE
INFORMED NOT TO TAMPER WITH THE
APPLIANCE OR TO BREAK ANY SEALS
ON THE PRESET CONTROLS OF THE
APPLIANCE.
9. EXTERNAL CONTROLS
Check that any other external controls
connected in the system such as time
clocks and thermostats, control the boiler as
required.
Explain and instruct the occupants on how
to use the system.
CO2 operation at slightly higher level (upto 9.8% is satisfactory provided 0.01%
CO is not exceeded.
Proceed as follows:
1. Turn off the electrical supply and gas supply. Ensure manometers are set to
zero refer to Figure 25 and Figure 26.
2. Open the inlet pressure test nipple and connect a sensing line from it to the
vertical manometer.
3. Remove the existing sensing line from nipple B and connect it to the T Piece.
Run a new line from the T to nipple B. Connect the remaining open outlet from
the T to the MINIMUM section side of the micromanometer - as shown.
4. Open nipple A and run a sensing line from it to the MAXIMUM suction side
of the micromanometer.
5. Before relighting the appliance, disconnect the sensing lines at the
micromanometer and (temporarily) join the ends with a solid dowel. Excessive
fan suction during pre-purge may draw fluid into the sensing lines if they are
left connected at this stage.
6. Connect the flue gas analyser to the flue gas sample point at the bottom of
the appliance (figure 4) . Turn on the gas and electrical supplies. Allow the
appliance to ignite and run for about 10 minutes. Meanwhile reconnect the
micromanometer.
7. Ensure the appliance is running continuously at maximum output (fan speed
98% for 25 model, 96% for 18 model and fan speed 68% for 12 model). After
10 minutes note the CO and CO
2
and offset readings and adjust to the figures
in the table above. Then ensure the CO and CO
2
readings reduce as the
appliance modulates down i.e. fan speed reduces - this ensures the offset
has been correctly set.
8. When the readings are satisfactory turn off gas and electricity supplies.
Remove/disconnect equipment and ensure all pressure test points are closed
and caps fitted over are sealed.
9. Re-fit all sensing lines correctly.
10. Undertake a gas soundness check.
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Summary of Contents for GC2000/120/E
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