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INSTALLATION
PILOT
-C14-
MANUAL
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8
4.2.1 - Recommendations
A type CB backflow prevention device may be installed. This
device must be at diff erent, non-regulated pressure zones. Check
your national laws and regulations to know if this is an obligatory
requirement. The backflow prevention device is designed to
prevent incoming heating water from entering the drinking water
circuit. It must be connected to the mains drainage system.
4.2.1.1 - Backfl ow prevention device
The output actually needed determines the water fl ow rate of
the heating circuit and allows to calculate the dimensions of the
distribution network.
Adapt the speed of the circulator pump to the hydraulic
characteristics using the fl ow rate/pressure curve provided.
All necessary measures must be taken to ensure that the installation
can be continuously purged. Automatic air purging valves should be
placed at each high point of the installation, and manual air purging
valves should be installed on each radiator.
A suffi
cient fl ow rate should be ensured so that the diff erence in
temperature between the outlet and inlet points does not exceed
6°C. In an installation equipped with thermostatic mixing valves, this
inspection must be done with all taps/valves open.
4.2.1.2 - Cross sections, purging of the
heating circuits
4.2 - Hydraulic installation
Consult the hydraulic schematic diagrams in the appendix.
Plan for a desludging tank with a suffi
icient volume at a low point
on the inlet of the heating circuit. This tank must be equipped
with a drain so it can collect the oxides, particles, and calamines
which detach from the inner walls of the heating circuit while it is
in operation.
4.2.1.3 - Desludging tank
Before placing the pilot and heat pump, it is necessary to rinse the
installation with an appropriate product. This allows to eliminate all
traces of soldering waste, joint fi ller, grease, sludge, metallic particles,
etc... in the radiators, underfl oor heating, etc...
The installation must be equipped with an expansion vessel. Its
capacity must be suffi
cient.
4.2.1.4 - Preparing the hydraulic circuit
(rinsing)
Frost protection is necessary if the pilot is switched off during the
winter months (ex: secondary residence, etc...).
4.2.1.6 - Frost protection
If the appliance is connected to an
electricity supply, the heating circuit is
protected from freezing. It is IMPERATIVE
to drain the domestic hot water circuit however.
If the pilot is not being supplied with electricity
(electrical cut-off for example), or it is defective
and there is a risk of freezing, it is IMPERATIVE to
completely drain the appliance (heating and hot
water).
The installation must be equipped with an expansion vessel with
a suffi
cient capacity (which depends on the static height of the
installation, the blowing-up pressure of the expansion vessel and
the volume of the installation)
4.2.1.5 - Expansion vessel
It is mandatory to install a 65°C safety aquastat (OPT) with manual
reset (OPT) on the underfl oor heating outlet.
CAUTION WHEN THE INSTALLATION INCLUDES A SANITARY
TANK !
4.2.1.7 - Underfl oor heating
1. The DHW setpoint setting must be less than 55 ° C.
2. Place the safety aquastat as close as possible to the
common outlet of all the underfl oor heating loops (that
is to say just upstream of the fl oor outlet manifold) so as
to move it away from the Pilot’s fl oor outlet outlet and in
order to avoid its triggering after a load of the domestic
hot water tank.
I t is I M P E R AT I V E to refer to the
installation instructions for the initial
installation of the ambient temperature
thermostat to ensure satisfactory operation.
In an installation with both thermostatic
v a l ve s a n d a r o o m t e m p e r a t u r e
thermostat, the radiator(s) in the room in which
the thermostat is located MUST be equipped
with a manual valve(s).
Thermostatic valves: these valves should prioritise rooms with
higher levels of heat gain.
4.2.1.8 - Thermostatic valves
4.2.1.9 - Treatment of the water in the
heating circuit
It is MANDATORY to read the additional
document concerning the quality of
water used for fi lling the installation.This
document is included with this manual as well as
in the packet with the warranty information.
This document also contains information which is
PERTINENT to the WARRANTY of the material.
