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INSTALLATION
DS170 PILOT
MANUAL
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11
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...
4.2.1.4 - Preparing the hydraulic circuit
(rinsing)
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.
If necessary, add an additional expansion vessel to the 8L one
already included in the boiler.
Frost protection is necessary if the pilot is switched off during the
winter months (ex: secondary residence, etc...).
4.2.1.5 - 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).
It 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 ro o m t e m p e rat u re
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.
4.2.1.7 - Thermostatic valves
4.2.1.8 - 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.
4.2.1.6 - Underfl oor heating
It is mandatory to install a 65°C safety aquastat (OPT) with manual
reset on the underfl oor heating outlet.
OPT kit (Ref. 710111)
: Use the additional wiring provided in the
kit to protect the underfl oor heating.
Refer to the diagrams in Appendix.
When the installation includes an underfl oor heating, do not exceed
a temperature target of 55°C.
CAUTION WHEN THE INSTALLATION INCLUDES A SANITARY
TANK !
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.
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