5.11 Filling The System; Water Treatment - REMEHA CALORA TOWER GAS 15S EX Installation And Service Manual

CALORA TOWER GAS 15S EX CALORA TOWER GAS 25S EX
CALORA TOWER GAS 35S EX
230V / 50Hz Power supply
MBO PUMP Boiler pump
F6.3AT 6.3A fuse
HMI Control interface
X1...X20 PCB connector PCU X112
L Live
N Neutral

5.11 Filling the system

22/04/2016 - 300026141-001-07
PCU Primary control unit
SONDE DHW Domestic hot water sensor X121 Reversal valve
SONDE EXT Outside sensor
X111 SU bus connector
Water pressure gauge
X114 Return temperature
X115 Flow temperature
5.11.1.
In most cases, the boiler and the central heating installation can be
filled with normal tap water and no water treatment will be necessary.
5.11.2.
1. Open the cold water inlet and heating outlet valves.
2. Open the filling/draw-off valve on the heating system.
T000181-B
3. Close the filling valve when the pressure gauge shows a pressure
of 2 bar.
X117 Limiter thermostat, top
X21 Gas valve
X22 Ignition transformer
X41 BO PUMP 230V
X91 Fan
ZG General switch

Water treatment

WARNING
Do not add chemical products to the central heating water
without consulting Remeha. For example: antifreeze,
water softeners, products to increase or reduce the pH
value, chemical additives and/or inhibitors. These may
cause faults in the boiler and damage the heat exchanger.
For untreated water, the pH value of the water in the
4
installation must be between 7 and 9 and for treated
water between 7 and 8,5.
The maximum hardness of the water in the installation
4
must be between 0,5 - 20,0 °dH (Depending on the
total installed heat output).
For more information, refer to our publication water
4
quality rules. The rules in the aforementioned
document must be respected.
Filling the system
CAUTION
Before filling, open the valves on every radiator in the
installation.
In order to be able to read off the water pressure from the
boiler display, the boiler must be switched on.
5. Installation
53