Connection To Water, Gas And Pipe - HTW Modulante A02 series Owners And Installation Manual

To technician personnel
Use methods as below to install the water heater:
1. Use installation template of the graph in "Technical Information" to decide positions of
installation holes.
2. If necessary, use installation template to pre-install connection parts of gas, flue gas
and water pipe.
3. Open the flip cover and shut off controlling knobs.
4. Unscrew the two screws on the bottom of the framework and dismantle the framework.
5. Install the water heater.
6. Take off the plastic cap from the connectors.
7. Install connectors. (Refer to the part of "Connection to Water, Gas and Pipe")
8. Install framework and put on controlling knobs.
4

Connection to Water, Gas and Pipe

Gas water heater connections can only be carried out by professional technician
personnel.
Obey national installation rules.
Make sure that the gas and gas pressure are same as those described on the gas water
heater technical plate.
Please carefully clean dirt and installation residues before connecting gas pipe
and water pipe to the water heater.
Connection to Gas
4.1
Gas supply pipe shall be installed with a companion gas valve of G1/2'' (as reference
image below).
If necessary, a pressure-relief valve must be installed on gas supply line.
4.2 Connection to water
A check valve must be
installed on cold water supply
line (as reference image).
We suggest install a pressure-
relief valve on cold water
supply line.
Connect a check valve to cold
water pipe.
Use a corrugated hose to
connect cold water inlet and
check valve.
Use another corrugated hose to
connect hot water outlet to water
tap.
8
Recommended Connection Line