Navien CR-180 Installation Manual page 45

o Venting
o Has the water heater 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?
o Ensure that ABS cellular core or PVC cellular core pipe has not been used as
venting for this water heater;
o Ensure the water heater is not common vented with any other appliance or vent
stack;
o Is the vent sloped upwards toward the vent terminal at a rate of W' per foot (2%
grade)?
o Are all vent runs properly supported?
o Has the vent terminal been properly supported?
o Have all air intake and exhaust joints from flue collar to termination been properly
sealed?
o Have the vent end caps been installed on the exhaust and the intake pipes?
o Has the venting been checked for leakage?
o Is the vent terminal a minimum of 1 2" above the exterior grade?
o Has sufficient make-up air been supplied?
o Is the total vent length within the stated maximum vent length restriction?
o Has a condensation drain line been installed from the water heater to a floor
drain or laundry tub?
o Electrical Wiring
o Is the supplied voltage 1 1 0- 1 20V AC?
o Is the water heater plugged into a properly grounded electrical outlet?
o If the supplied power cord has been discarded to meet local codes, has an
"On/Off" switch been installed to facilitate end-user maintenance?