19
Installing the Water Heater
WARNING
●
Before connecting the gas supply, determine
the gas type and pressure for the water heater
by referring to the rating plate. Use only
the same gas type indicated on the rating
plate. Using a different gas type will result
in abnormal combustion and malfunction
of the water heater. Gas supplies should be
connected by a licensed professional only.
●
To avoid damaging the connectors on
the water heater, use two wrenches when
tightening pipes to the water heater. Use
one wrench to prevent the connector at the
water heater from turning, and use the other
wrench to tighten the connection. Damaged
connectors may result in system leaks.
●
Properly support the pipes with hangers. Do
not allow the pipes to be supported by the
water heater or its accessories.
●
Ensure that the gas piping is protected
from physical damage and freezing, where
required. Failure to follow these instructions
could result in gas leakage, and result in fire,
explosion, property damage, severe personal
injury, or death.
●
The appliance and its gas connection must
be leak tested before placing the appliance
in operation.
●
To avoid danger of explosion and fire, do not
use flame to check for a gas leak. Perform a
bubble test on the joints to check for gas
leaks. If a leak exists, bubbles will form at
the leaking joint. A gas leak could result
in substantial property damage, severe
personal injury, or death.
●
This water heater cannot be converted from
natural gas to propane or vice versa without
a Navien gas conversion kit. Do not attempt a
field conversion of this water heater without
a Navien gas conversion kit installed by a
qualified service agency.
3.3 Connecting the Gas Supply
WARNING
●
E773 - Improper Gas Type Detection Warning
This error code activates when the unit
detects a discrepancy between the gas type
set during installation and the gas type
connected to the unit. This function may not
detect all abnormal gas connections and that
the #1 DIP switch setting must be verified on
the Front panel before use.
The unit may take some time to detect the
gas type discrepancy as it depends on the gas
flow rate and the exhaust outlet temperature.
The error code may activate with the correct
gas type and gas type setting due to varying
measuring tolerances in the unit.
If the error code persists when the DIP switch
setting matches the connected gas type,
contact Navien Technical Support.
●
Using a different gas type will result in
abnormal combustion and malfunction of
the product.
To prevent death, serious injury or property
damage:
-
ALWAYS check the Rating Plate located on
the side of the product matches the gas
type, gas pressure, water pressure, and
electrical supply available for the unit.
-
CHECK the #1 DIP switch setting on the
Front panel matches the type of gas
supplied to the unit (OFF for Natural Gas
and ON for Propane Gas).
1
2 3 4 5 6 7 8 9 10
ON
ON
ON
OFF
1
2 3 4 5 6 7 8 9 10
ON
ON
OFF
[NHW700 Indoor Models]
[NHW700 Outdoor Models]
Switch Function Setting
1
Gas Type
Natural Gas
1: OFF
Propane Gas 1: ON
