Navien NPE-32AWE Installation Manual page 16

Adequate installation clearances
CAUTION
Do not install the water heater on carpeting.
Install the water heater in an area that allows for service and
maintenance access to utility connections, piping, filters,
and traps. Based on the installation location, ensure that the
following clearances are maintained:
Back
Sides
16 Installing the Water Heater
Top
Sides
Front
Bottom
Clearance from: Indoor Installation
Top 250 mm minimum
Front 100 mm minimum
Bottom 300 mm minimum
Back 20 mm minimum
Sides 76 mm minimum
Clean, debris and chemical-free combustion air
Do not install the water heater in areas where dust and debris
may accumulate or where hair sprays, spray detergents,
chlorine or similar chemicals are used.
Do not install the water heater in areas where petrol or other
flammables are used or stored.
Ensure that combustible materials are stored away from the
water heater and that hanging laundry or similar items do not
obstruct access to the water heater or its flue system.
About Water Quality
Proper maintenance of the water heater is required when water
quality does not meet standards. Damage caused by poor water
quality is not covered under warranty. The following table shows
the maximum contaminant levels allowed. If you suspect that
your water is contaminated in any way, discontinue use of the
water heater and contact an authorized technician or licensed
professional.
Installation in hard water areas
In areas with hard water (hardness exceeding 200 ppm), it is
important to install a scale reducer. The advice of the local water
authority should be sought.
Contaminant
Total Hardness
Aluminum
Chloride
Copper
Iron
Manganese
pH
Sulfate
Total Dissolved Solids (TDS) Up to 500 mg/l
Zinc
Chlorine
Maximum Allowable Level
Up to 200 mg/l (12 grains/gallon)
0.05 to 0.2 mg/l
Up to 250 mg/l
Up to 1.0 mg/l
Up to 0.3 mg/l
Up to 0.05 mg/l
6.5 to 8.5
Up to 205 mg/l
Up to 5 mg/l
Up to 4 mg/l