Gas Connection - Hamworthy VARMAX 120 Installation, Commissioning And Servicing Instructions

VARMAX - Installation, Use and Maintenance
4.12.7. Boiler with 4 tappings
figure 29 - Connection with 4 tappings
WARNING:
WARNING :
4.12.8. Condensate removal
WARNING:

4.13. Gas connection

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Main exchanger
flow
Condenser flow
main exchanger return
Condenser return
U0501961-A
Do not connect DHW (domestic hot water) or swimming pool water to
the condenser circuit.
Check the water supply of the condenser circuit before starting up
the boiler.
Removal to the drains, via a drain hopper, using a P.V.C tube (minimum
diameter 32 mm) is mandatory because the condensates are acidic and thus
aggressive (pH between 3 and 5).
Use a sufficient slope of 3% to ensure correct flow of the condensates.
Neutralise these condensates before removal according to regulations
in force.
Before installing the boiler, it is necessary to clean the inside of the installation's
gas line (metallic particles, soldering residue, etc.). This helps to improve the
product's longevity.
Before commissioning the boiler, check that the natural gas supply pressure
corresponds to the boiler's nominal pressure mentioned on the identification
plate.
Before feeding gas to the installation, ensure that the different connections
are correctly made and gas tight.
In particular, check the presence of a removable connector between the
isolating valve and the boiler gas supply tapping.
An additional improvement can be obtained
by connecting the boiler in 4 taps. It consists in
decoupling the condenser (low temperatures)
from the main exchanger (high temperatures).
VARMAX 4-port boilers are equipped with 2
internal irrigation circuits which separate the
return from the installation circuits connected to
the main exchanger from the one with the most
favorable return to the installation, connected to
the condenser.
There are no throughput constraints regarding the
condenser.
00BNO9168-I (U0606551)