Navien CH-180 Installation Manual - page 62

Venting

Electrical Wiring

Has the combination Water Heater / Heating Boiler been vented with 3" ABS 

(except cellular core ABS), 3" PVC, Navien’s 4" Stainless Steel Concentric Vent 

kit or Type BH Special Gas Vent (S636 PVC or stainless steel) for Category IV 

appliances or in accordance with this manual and/or your local code?

Ensure that ABS cellular core or PVC cellular core pipe has not been used as 

venting for this Water Heater / Heating Boiler.

Is the vent sloped upwards toward the vent terminal at a rate of 1/4" per foot (2%

grade)?

Are all vent runs properly supported?

Has the vent terminal been properly supported?

Have all air intake and exhaust joints from flue collar to termination been properly

sealed?

Have the vent end caps been installed on the exhaust and the intake pipes?

Has the venting been checked for leakage?

Is the vent terminal a minimum of 12" above the exterior grade?

Has sufficient make-up air been supplied?

Is the total vent length within the stated maximum vent length restriction?

Has a condensation drain line been installed from the combination Water Heater / 

Heating Boiler to a floor drain or laundry tub?

Is the supplied voltage 110~120VAC?

Is the combination Water Heater / Heating Boiler plugged into a properly 

grounded electrical outlet?

If the supplied power cord has been discarded to meet local codes, has an 

“ON/OFF” switch been installed to facilitate end-user maintenance?

INSTALLATION CHECKLIST

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