INSTALLATION INSTRUCTIONS
24
3.7 Gas Connection
3.7.1 Gas Piping Guidelines
Follow all local codes and/or the most recent edition of the National Fuel Gas Code (ANSI Z223.1/NFPA 54) in
the USA or the Natural Gas and Propane Installation Code in Canada (CAN/CSA B149.1).
3.7.2 Gas Supply Lines Pressures
The minimum and maximum inlet gas pressures are
Natural Gas Min. 7.00”WC – Max. 14.00”WC
.
Gas pressures over and above the specified range will result in adverse performance and dangerous operating
conditions; any damage resulting from extreme gas supply pressures will not be covered by the limited
warranty.
Until pressure testing of the main gas supply line is completed, ensure the gas line to the FLOWMAX
Combination Water Heater is disconnected to avoid any damage to the water heater.
The appliance and its individual shut off valve must be disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in excess of 0.5 psi (3.5 kPa)..
The appliance must be isolated from the gas supply piping system by closing its individual manual shut-off
valve during any pressure testing of the gas supply system at test pressures equal to or less that 0.5 psi (3.5
Pa).
The gas appliance and its gas connections must be leak tested before placing the appliance in operation.
Leaks can be found by using a gas leak detection device or by applying soapy water to all gas fittings. Should
bubbles occur, tighten those connections and re-test.
Always purge the gas line for any debris before connecting to the water heater gas inlet.
Never use an open flame to test for gas leaks as property damage, personal injury or death could result.
The maximum inlet gas pressure must not exceed the valve specified by the manufacturer and that the
minimum valve listed as for the purposes of input adjustment.
The connection to the gas supply must be carried out by professionally qualified personnel in accordance with
the relevant standards.
■
Check the internal and external seals of the gas supply system.
■
A gas shut-off valve must be installed upstream of the appliance
■
Before starting up the water heater, make sure that the type of gas corresponds to that for which the appliance
has been set-up.
■
The gas supply pressure must be between the values reported on the rating plate.
■
Conversion of the appliance from natural gas to LPG or vice versa must be carried out by qualified personnel.
■
The power supply cable must be replaced by a qualified electrician. If the cable is damaged in any way, switch
off the appliance and have the cable replaced by a suitably qualified electrician.
When using an electrical appliance, a few fundamental rules must be observed:
•
Do not touch the appliance with damp or wet parts of the body or when barefoot.
•
Do not pull on the electric wires.
•
Do not allow the appliance to be used by children or anyone unfamiliar with its operation.
If the unit fails to re-start after any fault, unplug the unit for 30 seconds, then re-plug in the unit and try to restart with the on/off
switch. If the unit fails to restart, call a qualified Technician for service.
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