49
COMMISSIONING
At the time of commissioning, please ensure the Commissioning Checklist is completed for the installation.
CYLINDER UNIT - INITIAL FILL PROCEDURE
•
BEFORE FILLING CHECK AND TIGHTEN ALL MECHANICAL JOINTS AND CONNECTIONS IN CASE THESE HAVE
LOOSENED DURING TRANSIT.
•
Check expansion vessel pre-charge pressure. The vessel is supplied pre-charged to 3.5 bar to match the control pressure of
the pressure reducing valve. The pre-charge pressure is checked using a car tyre gauge by unscrewing the plastic cap opposite
the water connection.
•
Check all connections for tightness including the immersion heater(s). An immersion heater key spanner is supplied for this
purpose.
•
Ensure the drain cock is CLOSED.
•
Open a hot tap furthest from the cylinder.
•
Open the cylinder isolating valve to fill the unit. When water flows from the tap, allow to run for a few minutes to thoroughly
flush through any residue, dirt or swarf, then close the tap.
•
Open successive hot taps to purge the system of air.
•
Ensure all hot taps are closed to retain system charge.
CYLINDER UNIT - SYSTEM CHECKS
•
Check all water connections for leaks and rectify as necessary.
•
Turn off water supply to the cylinder.
•
Remove the Pressure Reducing Valve head work to access the strainer mesh, clean and re-fit.
•
Manually open, for a few seconds, each relief valve in turn, checking that water is discharged and runs freely through the
tundish and out at the discharge point.
•
Ensure that the valve(s) re-seat satisfactorily and reinstate the cylinder water supply.
CYLINDER UNIT - INITIAL FLUSH PROCEDURE
•
Energise system to heat-up cylinder unit contents to a temperature of approx. 30 - 40°C.
•
Flush/drain the water contents to remove any residue/impurities resulting from the installation works.
•
Use the cylinder unit drain cock to safely discharge the warmed water to drain via a suitable hose.
•
On completion, close drain cock, re-fill system and resume system commissioning.
DOMESTIC HOT WATER (DHW) CIRCULATION
Ensure the DHW circulation pump is set to speed setting II to ensure optimum DHW heating performance
. Failure to
do so can result in excessive use of the back-up immersion heater or lower storage temperatures than required.
PRIMARY CIRCUIT - FILLING THE SYSTEM
•
Check and charge expansion vessel.
•
Check all connections including factory fitted ones are tight.
•
Insulate pipework between cylinder and outdoor unit.
•
Thoroughly clean and flush, system of all debris. (see page 24 for instruction.)
•
Fill cylinder unit with potable water. Fill primary heating circuit with water and suitable anti-freeze and inhibitor as necessary.
Always use a filling loop with double check valve when filling the primary circuit to avoid back flow
contamination of water supply.
•
Check for leakages. If leakage is found, retighten the screws onto the connections.
•
Pressurise system to 1 bar.
•
Release all trapped air using air vents during and following heating period.
•
Top up with water as necessary. (If pressure is below 1 bar)
•
After removing the air, automatic air vent
MUST
be closed.
Fernox HP5-c frost protection levels:
10% Concentration provides frost protection to -4°C
20% Concentration provides frost protection to -9°C
30% Concentration provides frost protection to -14°C
Switch on the electrical supply to the Air Source Heat Pump and immersion heater. Programme the Air Source Heat Pump Main
Remote Controller as detailed in the previous System Set Up chapter. Set the controller for hot water operation only. After a short
delay the heat pump circulating pump on the return to the Heat Pump and the DHW circulating pump should run and the Heat
Pump operate. The temperature of the primary flow to the cylinder should increase, if it does not, check for a wiring or piping error.
Allow the cylinder unit to heat up.
Select the heating only function on the controller. The heat pump circulating pump and the heating zone 1 circulating pump should
run and the Heat Pump operates. The primary flow to the low loss header and the secondary flow to the heating zone 1 circuit should
become hot, if it does not check for a wiring or piping error.
The minimum hot water setting is 40°C. The maximum hot water setting is 60°C. In hard water areas a maximum of 55
o
C is
recommended.
When the heating and hot water temperatures are reached, the pumps should stop running and the Heat Pump stop operating.
Check that no water is discharged from either the expansion valve or temperature and pressure relief valve during the heating
cycle. If the user temperatures or “On” and “Off” times have been adjusted for commissioning purposes, the main remote controller
should be reset to the desired settings. The operation of the user controls should be demonstrated to the user and the main remote
controller installation and user instructions left with them for future reference.
Содержание EHPT15X-UKHDW1S
Страница 50: ...50 Notes ...
Страница 51: ...51 Notes ...
