Commissioning - Jet 120i Installation & Servicing Instructions Manual

Commissioning

Filling The Unit With Water
Ensure that all fittings and immersion heaters are
correctly fitted and tightened. An immersion heater
key is provided to aid tightening the immersion
heater(s)
• Check all connections for tightness including the
immersion heater(s). An immersion heater key
spanner is supplied for this purpose.
• Ensure any drain valve fitted is CLOSED.
• Open a hot tap furthest from the cylinder.
• Open the mains stop 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.
System Checks
• Check all water connections for leaks and rectify
as necessary.
• Turn off mains water supply.
• Remove the pressure reducing valve head to
access the strainer mesh, clean and re-fit.
• Turn mains water supply on.
• 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) reseat satisfactorily.
Indirect Units
Fill the indirect (primary) circuit following the boiler
manufacturer's commissioning instructions. To ensure
the cylinder primary heat exchanger is filled, the 2
port motorised valve (supplied) should be manually
opened by moving the lever on the motor housing
to the MANUAL setting. When the primary circuit
is full return the lever to the AUTOMATIC position.
Switch on the boiler, ensure the programmer is
set to Domestic Hot Water and allow the cylinder
to heat up to a normal working temperature 60
(recommended),. If necessary the temperature can
be adjusted by inserting a flat bladed screwdriver
in the adjustment knob and rotating. The minimum
thermostat setting is 12°C. Adjustment represents a
temperature range of 12°C to 72°C. Fig. 10, opposite.
Check the operation of the indirect thermostat, and 2
port motorised valve, and that no water has emitted
from the expansion relief valve or temperature/
pressure relief valve during the heating cycle.
14
Benchmark Log Book
On completion of the installation and commissioning
procedures detailed in this manual the Benchmark
Installation, Commissioning and Service Record Log,
pages 20 and 21 should be completed and signed
off by the competent installer or commissioning
engineer in the relevant sections. The various
system features, location of system controls, user
instructions and what to do in the event of a system
failure should be explained to the customer. The
customer should then countersign the Benchmark
Commissioning Checklist (page 20) to accept
completion. The service record should be filled
in when any subsequent service or maintenance
operation is carried out on the product.
THERMAL CUT-OUT RESET BUTTON
SPINDLE POSITIONS
= MINIMUM TEMP 12ºC
= MAXIMUM TEMP 72ºC
= APPROX 60 °C
ROTATE SPINDLE CLOCKWISE
C
o
FOR TEMPERATURE INCREASE
AND COUNTER CLOCKWISE
FOR TEMPERATURE DECREASE
Fig. 10: Temperature Adjustment Details
TEMPERATURE ADJUSTING
SPINDLE
TM