G Max Operation and Maintenance Manual
15
3 - OPERATION
3.1 Preliminary checks
Before starting the heater, check that:
1. All connections, both electrical and gas, are made according to the instructions in this manual;
2. The heater is free and clean;
3. The manual gas shut-off valve on the gas supply line is open.
3.2 First start-up
•
The operations described in this paragraph must be carried out exclusively by authorised
and qualified technical personnel, using suitable personal protective equipment.
•
Check that the air inlet and outlet sections are not obstructed, even partially;
•
Make sure that all cables are properly positioned and that they are not pinched or
pulled too tight;
•
Ensure that the connections to the gas supply line are correct;
•
Open the tap on the gas supply line (or cylinder)
•
Check that there are no leaks along the gas supply line and on the connections
using a leak detector liquid or soapy water.
•
Check that the supply pressure complies with what is shown in the technical data
tables for the type of gas used
.
•
Start the heater by setting the room thermostat to the desired temperature, or, in the case of
manual operation, by powering up the appliance via an ON/OFF switch, electrical
panel, etc.
•
Check that the startup sequence is correct.
Startup sequence
The contact on pins 1-2 of the thermostat socket
is closed
KO
→
Wait for contact closure
OK
Gas valve test (3")
KO
→
Lock-out + light signal
OK
Flow switch test: contact open?
KO
→
Wait until it opens
OK
Fan start
Flow switch test: contact closed (4")?
KO
→
Lock-out + light signal
OK
Check closure (3")
“No f
lame
”
check
KO
→
Lock-out + light signal
OK
Opening gas valve and spark
“
Flame
on”
check
KO
→
Lock-out + light signal
OK
Flame on: regular operation
Control and adjustment of working pressures
The unit is equipped with a multifunctional gas valve that includes two safety solenoid valves and a
regulator, allowing to control the inlet and outlet gas pressures and to adjust the outlet pressure to the
burner (see Fig. 3.2.1)
The appliance is set at the factory for operation in the Country of destination, with the type of gas and
pressure shown on the setting data label on the side of the appliance.
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