Installation In Older Systems And Systems Requiring Modifications; Boiler Location; Water Quality Guidelines - Riello Array AR 399 SE Installation, Operation And Service Manual

Fig. 14 Installation
24.80"
Fig. 15 Array AR SE
ø 0.41''
ø 0.41''
Fig. 16 Anchoring bolt detail
3.6 Installation in older systems and systems
requiring modifications
When installing these boilers in older systems or systems requiring
modifications, always perform the following checks:
− Make sure that the flue is able to withstand the tempera-
ture of the combustion gases and that it has been designed
and made in compliance with applicable standards. The
flue must also be as straight as possible, sealed, insulated
and not blocked or choked. See section "Combustion gas
exhaust" for any additional information.
− Make sure that the electrical supply system has been in-
stalled by a qualified electrician in compliance with appli-
cable standards
− Make sure that the fuel feed line and any storage tank are
made and installed in compliance with applicable stan-
dards
− Make sure that expansion tank(s) are big enough to contain
the additional volume generated by thermal expansion
− Make sure that the flow rate, head and direction of flow of
the pumps are suitable and correct
− The system has been washed, cleaned of mud and grime
and water seals have been checked
− A treatment system is fitted when the supply/refill water
has values other than those indicated in section "Water
Chemistry Guidelines"
9
NOTE: The manufacturer declines all responsibility for damage
caused by incorrectly constructed flue systems.

3.7 Boiler Location

− This boiler is suitable only for indoor installations.
− To operate properly and safely, this boiler requires a con-
tinuous supply of air for combustion. Install this boiler in a
clean, dry location with adequate air supply.
− Do not locate this boiler in an area where it will be subject
to freezing.
− The boiler should be located close to a floor drain in an area
where leakage from the appliance or connections will not
result in damage to the adjacent area or to lower floors in
the structure.
− DO NOT install this appliance in any location where gasoline
or flammable vapors are likely to be present.
− DO NOT install this appliance on top of carpet or combusti-
ble flooring.
− Appliance must be installed on a concrete level service pad
(3.5" - 4" minimum recommended height).
− Maintain required clearances 2" (50.8mm) from combusti-
ble surfaces.

3.8 Water Quality Guidelines

Excessive water hardness causing a lime buildup in the stainless
steel coils or tubes is not a fault of the appliance and is not covered
by warranty. Water hardness must fall within the following limits:
Parameters
General feature -
2.56''
PH value
Dissolved Oxygen
Total iron (Fe)
Total copper (Cu)
Na SO
2 3
N H
2 4
PO
4
21
Units Value
Colorless, no sediment
PH Min 6.5; Max 9
mg/l < 0,05
mg/l < 0,3
mg/l < 0,1
mg/l < 10
mg/l < 3
mg/l < 15
INSTALLATION