20
FA ROTEX HPSU monobloc compact • 09/2017
4
x
Set-up and installation
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Slide the retaining plate between the manifold and its horizon-
tal mounting and insert the manifold (fig. 4-12, item F) back
into its mounting through the middle hole of the retaining
plate.
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Secure the manifold with plug bracket (fig. 4-12, item G) in its
mounting again.
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Insert the two connection couplings (fig. 4-12, item B) into the
lateral mountings through the retaining plate.
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Secure the two connection couplings with plug brackets
(fig. 4-12, item C) in their mountings.
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Insert the sealing plug (fig. 4-12, item E) into the upper
mounting.
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Secure the sealing plug with plug bracket (fig. 4-12, item D).
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Cut out side openings in the thermal insulation (fig. 4-13,
item A) using a suitable tool.
4.4.2 Connecting hydraulic lines
Prerequisite: optional accessories (e.g. solar, backup heater) are
mounted on the ROTEX HPSU monobloc compact as specified
in the enclosed instructions.
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Check cold water pressure (maximum 6 bar).
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If a higher pressure is present in the domestic water pipe,
a pressure reducer will need to be installed.
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Establish hydraulic connections on the ROTEX HPSU mono-
bloc compact.
–
Refer to fig. 4-1 / fig. 4-2 and tab. 3-1 for the position and
dimensions of the heater connections and the outdoor unit
connections.
–
Pay attention to the stipulated tightening torque (see
chap. 10.3 "Tightening torque").
–
Install the line so that the sound insulation hood can be
positioned easily after installation.
–
Connect the water for filling or refilling the heating system
as per EN 1717 so that contamination of the drinking
water due to return flow is reliably prevented.
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Connect the drain line to the safety overpressure valve and
diaphragm expansion vessel as per EN 12828.
–
Check the seat of the drain hose on the pressure relief
valve.
–
If necessary, connect and install a separate hose.
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Carefully insulate pipework against heat loss and to avoid
condensation (insulation thickness at least 20 mm).
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Water shortage protection:
the controller's pressure and
temperature monitoring function shuts off the ROTEX HPSU
monobloc compact reliably if there is a shortage of water. No
additional water shortage protection is needed in the con-
struction.
–
Damage due to deposits and corrosion:
observe the rele-
vant technical rules to avoid corrosion products and deposits.
Minimum requirements regarding the quality of filling and sup-
plementary water:
–
Water hardness (calcium and magnesium, calculated as
calcium carbonate):
3 mmol/l
–
Conductivity:
1500 (ideal:
100)
ȝ
S/cm
–
Chloride:
250 mg/l
–
Sulphate:
250 mg/l
–
pH-values (heating water): 6.5 - 8.5
Measures for desalination, softening, hardness stabilisation or
other suitable conditioning measures are necessary to adhere to
the required water quality if the filling and top-up water have a
high overall hardness or other properties that deviate from the
minimum requirements.
Fig. 4-12 Heating supply and return connections aligned to the rear
CAUTION!
If the plug brackets cannot be put on properly,
the couplings can be detached from their
mountings to ensure a very strong or continuous
escape of liquid can occur.
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Before putting on a plug bracket, make sure
that the plug bracket engages in the coupling
groove. To do so, insert the coupling far
enough into the mounting that the groove is
visible through the plug bracket mounting.
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Insert the plug bracket up to the end stop.
Fig. 4-13 Cut-out in thermal insulation