Navien CH-180 Installation Manual page 9

Installation Warnings:
15.
Protect against snow accumulation around the vent terminations. Ensure the exhaust pipe
and the intake air pipe remain clear from obstructions at all times.
16.
DO NOT overtighten fittings as pipe and/or fitting damage may occur causing leakage.
17.
DO NOT install the combination Water Heater / Heating Boiler where subject to vibrations.
18.
The vent for this appliance shall not terminate over public walkways, or near soffit vents, crawl
space vents and other areas where condensate or vapor could create a nuisance, hazard or
cause property damage. Or where condensate and vapor could cause damage to or could be
detrimental to the operation of regulators, relief valves, or other equipment.
19.
For other than a direct vent appliance, the appliance must be located as close as possible to a
chimney or gas vent.
20.
Should overheating occur or the gas supply fails to shut off, turn off the manual gas control
valve to the appliance. Contact a Service Technician immediately.
21.
The gas connections and water connections must be leak tested before placing into operation.
22.
After placing into operation the ignition safety device must be tested.
23.
Visually inspect the venting system for proper size and horizontal pitch and determine there is
not blockage or restriction, leakage, corrosion and other deficiencies which could cause an
unsafe condition.
24. Insofar as is practical, close all building doors and windows and all doors between the space
in which the appliances remaining connected to the common venting system are located and
other space of the building. Turn on cloths dryers and any appliance not connected to the
common venting system. Turn on any exhaust fans, such ar range hoods and bathroom
exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.
Close fireplace dampers.
25. Place in operation the appliance being inspected. Follow the lighting instructions. Adjust
thermostat so appliance will operate continuously.
26. After it has been determined that each appliance remaining connected to the common venting
system properly vents when tested as outlined above, return doors, windows, exhaust fans,
fireplace dampers and any other gas-burning appliance to their pervious condition of use.
27. Any improper operation of the common venting system should be corrected so the installation
conforms with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CSA B149.1,
Natural Gas and Propane Installation Code. When resizing any portion of the common venting
system, the common venting system should be resized to approach the minimum size as
determined using the appropriate tables in Appendix F in the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural Gas and Propane Installation Codes.
28.
The instructions for the installation of the venting system shall specify that the horizontal
portions of the venting system shall be supported to prevent sagging; the methods of and
intervals for support shall be specified. These instructions shall also specify that the venting
system:
■ For Category I, II and IV boilers, have horizontal runs slopping upwards not less than 1/4
inch per foot (21 mm/m) from the boiler to the vent terminal;
■ For Category II and IV boilers, be installed so as to prevent accumulation of condensate;
and
■ For Category II and IV boilers, where necessary, have means provided for drainage of
condensate.
29.
"Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can
cause improper and dangerous operation."
30.
"Verify proper operation after operation servicing."
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