74
Make sure that the cold water supply line and the hot water supply line are properly connected to
the Combi Boiler.
Make sure that appropriate heat insulation measures are taken according to regional climate.
(e.g. wrapping with heat insulation materials, using electric heaters)
Connecting the Heating Pipe
(See page 44 - 47)
Yes No
Make sure that heating system pressure is 12 to 30 psi at the Combi Boiler outlet.
Make sure that no water leakage from heating supply pipe, heating return pipe and all of
connections.
Make sure that the backflow preventer is installed as required by local codes.
Make sure that expansion tank is installed. And check precharged pressure should equal the
system fill pressure for the Combi Boiler.
Make sure that air separator is installed.
Make sure all of the air is removed from the heating system.
Connecting the Condensate Drain
(See page 48 - 49)
Yes No
Make sure that the condensate drain piping is connected.
Make sure that corrosion resistant material is used for the condensate drain piping.
Make sure that the size of the condensate drain piping is 1/2 in or larger.
Make sure that the condensate drain piping slopes towards the inside floor drain or condensate
pump.
Make sure that the end of the condensate drain pipe is open to the atmosphere.
Make sure that the condensate has been treated before disposal as necessary.
(when required by local code or when the condensate could cause damage)
Make sure that measures are taken to prevent the condensate drain lines from freezing.
(e.g. insulation material, heat tape or electric heater)
Connecting Electricity
(See page 50 - 58)
Yes No
Make sure that the electrical supply is 120 VAC at 60 Hz.
Make sure the grounding resistance is less than 100 Ω.
Setting the DIP Switches
(See page 67 - 68)
Yes No
Make sure that all DIP switches are set correctly.
Water Filling and Trial Operation
(See page 68 - 72)
Yes No
Open a hot water fixture, make sure the BURNER ON indicator or the Flame indicator is displayed
on the Operation Display and hot water is present at the fixture.
Clean the filter in the cold water inlet after the trial operation.
If the Combi Boiler will not be used immediately, do the following.
• Close all gas and water shutoff valves.
• Drain all the water in the Combi Boiler and the plumbing system.
• Disconnect the electrical power to the Combi Boiler.
Explain the “Important Safety Information”, “Operation Procedures” and “Follow-up Service”
according to the Owner's Guide to the customer.
Quick Connect Multi-System Installation
(See page 51-52, 80)
Yes No
Make sure that the Water Heater’s Remote Controller is disconnected*.
* Quick Connect Multi System is operated by Combi Boiler’s Operation Display.
Checklist After Installation