Navien NFC-200 Quick Installation Manual page 3

Venting

Vent Termination Options
Horizontal vent termination
Interior view
Intake Air
Exhaust Gas
Vertical vent termination
in .
m ) m
Maintain 12" (300mm)
0 0 m
1 2 " (3
36" (900 mm) min. from any obstruction
above, below, left, or right
Venting Length
3" pipe venting
Maximum Length 150'
7
3
2
2-to-3-inch
1
Maximum number
of elbows: 8
· 90˚ elbow = 5 linear feet of venting
· 45˚ elbow= 3 linear feet of venting
Electrical Connections/High Altitude DIP Switch Settings

External LWCO Connection
(if required by local codes)
LWCO
Live
lLWCO
AC24VL
AC24VN
Live
Neutral
Refer to your local codes to determine if an
LWCO device is required for your system and
ensure that the built-in device meets the
requirements.
Safety
CAUTION
Disconnect the power to
the boiler before installing
any wire connections on
the main PCB.
Exterior view
in .
m ) m
0 0 m
1 2 " (3
Sidewall vent termination
2" pipe venting
8 6
Maximum Length 60'
5
4
3
2
1
Maximum number
of elbows: 6
· 90˚ elbow = 8 linear feet of venting
· 45˚ elbow= 4 linear feet of venting
Power Connection
120 V AC 60 Hz
Min. 2 Amp current with proper
grounding
CAUTION
Using abnormally high or low AC
voltage may cause abnormal operation,
thereby causing fire which reduces the
life expectancy of this product.
DO NOT touch DO NOT allow
the power the boiler to be
cord with wet exposed to
hands. excessive
amounts of
water.
Concentric Vent Termination
Sidewall installation
Combustion Air
Vent
Roof installation
Vent
Combustion
Air
Maintain 12" (300mm) min.
clearance above highest
anticipated snow level or
grade, whichever is greater
(maximum of 24" above roof )
Combustion Air
Vent
Exhaust Vent Piping Materials
All Navien boilers are Category IV appliances.
·
The venting system should be approved for use with Category IV appliances (typically Type BH
·
Special Gas Vent approved by UL 1738-S636).
· Venting requirements in the USA and Canada are different (see below).
Navien recommended venting materials
Locale Recommended Vent Materials
· PVC/CPVC Schedule 40 or 80 (Solid Core)
USA · Approved Polypropylene (PP)
· Approved Stainless Steel (SS)
· Type BH Special Gas Vent Class IIA (PVC)
Canada* · Type BH Special Gas Vent Class IIB (CPVC)
· Type BH Special Gas Vent Class IIC (Polypropylene/Stainless Steel)
* For installation in Canada, field-supplied plastic vent piping must comply with CAN/CGA B149.1 (latest
edition) and be certified to the Standard For Type BH Gas Venting Systems, ULC-S636. Components of this
listed system must not be interchanged with other vent systems or unlisted pipes or fittings. All plastic
components and specified primers and glues of the certified vent system must be from a single system
manufacturer and must not be intermixed with another system manufacturer's parts.
The supplied vent connector and vent termination are certified as part of the boiler.
Confirmation of DIP Switch Settings
DIP Switch 1 (6 switch unit)
SW Function Setting
Normal
1-OFF, 2-OFF
Operation
Operation
2-stage MAX 1-ON, 2-OFF
1 & 2
Status
1-stage MIN 1-OFF, 2-ON
1-stage MAX 1-ON, 2-ON
DIP Switch 2 (8 switch unit)
SW Function Setting Comment
Natural Gas 1-OFF
1 Gas Type
Propane Gas 1-ON
Refer to
0-1,999 ft 2-OFF,
Table 1
(0-609 m) 3-OFF
on page
103 in the
2,000-5,399 ft 2-ON,
Installation
(610-1,645 m) 3-OFF
High
&
2 & 3
Altitude
Operation
5,400-7,699 ft 2-OFF,
Manual.
(1,646-2,346 m) 3-ON
7,700-10,100 ft 2-ON,
(2,347-3,078 m) 3-ON
3
Combustion Air
Maintain 12" (300
mm) min. clearance
above highest
1" (25mm) min.
anticipated snow
level or grade,
whichever is greater
SW Function Setting Comment
Used 4-ON -
4 Well Pump
Unused 4-OFF -
5-OFF,
5 & 6 Country US/Canada -
6-OFF
Space Used 7-OFF -
7 Heating
Thermostat Unused 7-ON -
Used 8-OFF -
Exhaust
8 Temperature
Unused 8-ON -
Control
· When PCB DIP switch 2 #8 is set to
Note
On, ensure that CPVC,
polypropylene, or stainless steel is
used for exhaust venting.
· This unit may be installed at
elevations up to 10,100 ft (3,078 m)
for use with natural gas and
propane. To use the unit at a specific
altitude, the DIP switches should be
set as described above.
· High Altitude: Above 2,000 ft (610 m),
the unit will de-rate by 3% for each
1,000 ft (305 m) of altitude gain.
· For NG, if you install the unit at
above 5,400 ft (1,646 m), it is
required to change the Gas Orifice
for high altitude. Be careful not to
confuse it with the LP Gas Orifice.
For detail, refer to page 103 in the
Installation & Operation Manual.
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