Navien CH-180 Installation Manual - Heating Boiler:
If installing into a very tight space or corner, please ensure there is sufficient service
and maintenance access to all gas and water piping to ensure that regular
maintenance (such as cleaning the water filter, the air filter and the condensate trap)
will not become problematic.
Allow sufficient clearance:
DO NOT install in an area that contains or stores gasoline or other flammables.
Ensure that combustibles are clear of the immediate area. Ensure hanging laundry or
other such items will not impede the air movement into or out of the Water Heater /
Heating Boiler or its venting.
For commercial applications, avoid greasy fumes or a large amount of steam; take
measures to prevent the fumes and steam from entering in the equipment.
The boiler piping system of a hot water boiler connected to heating coils located in air
handling units where they may be exposed to refigerated air circulation must be
equipped with flow control valves or other automatic means to prevent gravity circula-
tion of the boiler water duriing the cooling cycle.
All Navien units come with an upper mounting bracket pre-drilled at 16" on center
for easy installation on standard stud walls. Affix the bracket to the wall securely,
ensuring that it is level and that it can support the weight of the combination Water
Heater / Heating Boiler. If the strength of the wall it not sufficient, reinforce the area
to prevent any unsafe situations.
If the framing is not standard, reinforcement of the wall is required or if installing
on an uneven surface, fasten 3/4" plywood to the stud wall and then attach the
mounting brackets to the plywood.
When using the supplied mounting bracket, it creates a 5/8" clearance from the
back of the unit.
The upper bracket is installed on the wall and the combination Water Heater /
Heating Boiler is then hung on the bracket. On the back of the combination Water
Heater / Heating Boiler at each of the top corners, there is a hanger bracket on the
back of the combination Water Heater / Heating Boiler that interlocks with a tabs on
the wall mounting bracket.
Top of Water Heater / Heating Boiler
Back of Water Heater / Heating Boiler
Front of Water Heater / Heating Boiler
Sides of Water Heater / Heating Boiler
Bottom of Water Heater / Heating Boiler
Min. 9 inches
Min. 0.5 inches
Min 4 inches
Min. 3 inches
Min. 12 inches
Indoor Install
Outdoor Install
Min. 36 inches
Min. 0.5 inches
Min. 24 inches
Min. 3 inches
Min. 12 inches
Locating the Combination Water Heater /
Heating Boiler:
Mounting the Unit to the Wall:
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