Navien CH-180 Installation Manual page 15

Plumbing:
Failure to properly pipe Water Heater / Heating Boiler may result in improper operation
and damage to the Combination Water Heater / Heating Boiler or structure.
This Combination Water Heater / Heating Boiler must only be used with the following
water supply system conditions;
Navien Combination Water Heater / Heating Boiler is equipped with a factory installed pres-
sure sensor type Low Water Cut Off device.
The Mininum operation system pressure allowable with this device is 7 psig.
Check local code if a Low Water Cut Off is requred. If so, determine if this device meets the
requirements of the local codes.
If a separate LWCO device is required by certain local jurisdications or when the Navien
Combination Water Heater / Heating Boiler is installed above the system piping, the folloing
guidelines must be followed:
- The LWCO device must be installed in a tee connection on the Water Heater / Heating Boiler
/supply piping above the Water Heater / Heating Boiler.
A hot water boiler installed above radiation level or as required by the Authority having
jurisdiction, must be provided with a low water cutoff device either as a part of the boiler or
at the time of boiler installation.
15