-
INSTALLATION
PRIMO PILOT
MANUAL
-
8
The
PRIMO
Pilot
must be placed in an area which is free from frost
and adverse weather conditions.
It must be placed as close to the heat pump as possible without
exceeding the maximum distance.
The maximum distance depends on the diameter of piping and the
number of elbows used (see «Hydraulic connection» tables).
The 2-core sheathed cable which connects the
PRIMO
Pilot
and
the heat pump measures 10m. There is a 20m length available as
an optional extra (Ref.751005).
4.2.1 - Recommandations
French law (articles 16.7 and 16.8 of the «Reglement Sanitaire
Departementale») stipulates that a type CB backfl ow prevention
device must be installed. This device must be at diff erent, non-
regulated pressure zones, in accordance with the NF P 43-011
standard. This is also an obligatory requirement in other countries,
which makes it important to verify the current laws and regulations
in eff ect in the country of installation to ensure that your installation
is in compliance. The backfl ow 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
4.2 - Hydraulic installation
Consult the hydraulic schematic diagrams in the appendix.
4 - INSTALLATION
4.1 - Placement choice
The Pilot must be installed on a level
and stable base which is distanced from
appliances used for cooking and other
heat sources.
4.1.1 - Appropriate placement choice
4.1.2 - Integration
A
B
Primo
pilot
400
791
Plan for a desludging tank with a suffi
cient 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
PRIMO
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...
4.2.1.4 - Preparing the hydraulic circuit
(rinsing)
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.
The output actually needed determines the water fl ow rate of
the heating circuit and allows to calculate the dimensions of the
distribution network.
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.
4.2.1.2 - Cross sections, purging of the
heating circuits
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
Pressure head of the
installation (m)
2.5
5
7.5
10
12.5
15
Pre-infl ated pressure
(bar)
(1)
0.25
0.50
0.75
1.00
1.25
1.50
Maximum volume of
the installation covered
by the 8L expansion
vessel*
(2)
152
138
125
111
97
83
Expansion factor*
(3)
0.05 0.058 0.064 0.072 0.083 0.096
*The values given are for application to radiators (water at 80
o
C)
For application to underfl oor heating:
-Multiply
values
(2)
by 2
-Divide
values
(3)
by 2
(1)
: Defl ate and check pressure in the expansion vessel if necessary.
(2)
: As a guideline, take into account:
•11 litres per kW heating capacity for steel radiators
• 13 liters per kW heating capacity for cast-iron radiators
• 17 liters per kW heating capacity for underfl oor heating
(3)
For installation with a larger volume of water, multiply the volume by the
expansion factor corresponding to the pre-infl ated pressure to obtain
the minimum required capacity of the expansion vessel. When an 8L
expansion tank is included in the unit, add an additional expansion
tank, if necessary.
