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INSTALLATION
PILOT
-C14-
MANUAL
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36
A2.4 - 2 underfl oor heating circuits
AQS :
Aquastat
CAR :
Non-return
valve
Ch
:
Boiler back-up (optional)
CP
:
Pressure
sensor
Cpac :
HP
circulator
C1
:
Circuit 1 circulator
C2
:
Circuit 2 circulator
D :
Filling
valve
Ext
:
Outside
sensor
F
:
Filter
Valve
LTP :
OPT - overheat protection thermostat
P :
Air bleed
Pl :
Underfl oor heating circuit
SA
:
Ambient
sensor
Sch :
Boiler pressure relief valve
Spil :
Pilot pressure relief valve
TA
:
Ambient
thermostat
Tpil :
Pilot sensor (hot water outlet)
VA
:
Shut-off valve
Vb
:
Sludge fl ushing valve
VE
:
Expansion
vessel
Outside sensor
or
Ambient sensor or Ambient thermostat
Towards boiler
’s
thermostat input