9 Handing the product over to the operator
22 Installation and maintenance instructions SUSTAIN ..c 0020200954_00
8.3 Setting the bypass valve
Caution.
Risk of material damage caused by incor-
rect setting of the high-efficiency pump
If the pressure at the bypass valve is in-
creased (by turning it clockwise) and the
pump output is set to less than 100%, the
product may not operate correctly.
▶ In this case, set the pump output to
5 = 100% using diagnostics parameter
d.14.
If the pump operating mode d.14 Pump speed target value
= Auto (∆p limit) is set, the default setting must not be
changed.
▶ Remove the front casing. (→ Page 11)
▶ Regulate the pressure using the adjusting screw (1).
Position of the ad-
justing screw
Pres-
sure
in MPa
(mbar)
Notes/application
Right-hand stop
(turned all the way
down)
0.035
(350)
If the radiators do not
heat up sufficiently at the
default setting. In this
case, you must set the
pump to the maximum
speed.
Mid-position (5 turns
to the left)
0.025
(250)
Default setting
5 further turns to the
left from the mid-
position
0.017
(170)
If noises are produced in
the radiators or radiator
valves
▶ Install the front casing. (→ Page 11)
8.4 Setting the hot water temperature
Danger!
Risk of death from Legionella.
Legionella multiply at temperatures below
60 °C.
▶ Ensure that the operator is familiar with all
of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.
▶ Set the hot water temperature.
Conditions: Water hardness: > 3.57 mol/m³
– Hot water temperature: ≤ 50 ℃
9 Handing the product over to the
operator
▶ When you have finished the installation, attach the sticker
supplied (in the operator's language) to the product
cover.
▶ Explain to the operator how the safety devices work and
where they are located.
▶ Inform the operator how to handle the product.
▶ In particular, draw attention to the safety information
which the operator must follow.
▶ Inform the operator of the necessity to have the product
maintained on a regular basis.
▶ Instruct the operator about measures taken to ensure the
supply of combustion air and flue gas pipe.
10 Inspection and maintenance
10.1 Observing inspection and maintenance
intervals
▶ Adhere to the minimum inspection and maintenance in-
tervals. The inspection may require maintenance to be
carried out earlier, depending on the results.
Inspection and maintenance work – Overview
(→ Page 37)
10.2 Procuring spare parts
The original components of the product were also certified
as part of the declaration of conformity. If you do not use
certified Glow-worm original spare parts for maintenance
or repair work, this voids the conformity of the product. We
therefore strongly recommend that you install Glow-worm
original spare parts. Information about available Glow-worm
original spare parts is available by contacting the contact
address provided on the reverse of this document.
▶ If you require spare parts for maintenance or repair work,
use only Glow-worm original spare parts.
10.3 Removing the gas-air mixture unit
Note
The gas-air mixture unit consists of three main
components:
– Ventilator
– Gas valve
– Burner cover
1. Switch off the product via the main switch.
2. Close the gas isolator cock.
3. Remove the front casing. (→ Page 11)
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