Electrical Connections - Navien NCB-180 Quick Installation Manual

Venting
Vent Termination Options
Horizontal vent termination
Interior view
Intake Air
Exhaust Gas
Vertical vent termination
Venting Length
3" pipe venting
Maximum Length 150'
2-to-3-inch
reducer
Maximum number
of elbows: 8
90 elbow = 5 linear feet of venting
45 elbow= 3 linear feet of venting

Electrical Connections

External LWCO Connection
(if required by local codes)
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
12"(300mm)min.
Sidewall vent termination
2" pipe venting
Maximum Length 60'
Maximum number
of elbows: 6
90 elbow = 8 linear feet of venting
45 elbow= 4 linear feet of venting
Power Connection
120 VAC 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 allow
DO NOT
the boiler to be
touch the
exposed to
power
excessive
cord with
amounts of
wet hands.
water.
Concentric Vent Termination
Sidewall installation
Combustion Air
Vent
Roof installation
Vent
Combustion
Air
Maintain 12" min.
(18" min. for Canada)
clearance above highest
anticipated snow level
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
Navien recommended venting materials
Locale Recommended Vent Materials
USA PVC Schedule 40(Solid core)
CPVC Schedule 40 or 80(Solid core)
Approved Polypropylene
Canada* Type BH Special Gas Vent Class IIA (PVC)
Type BH Special Gas Vent Class IIB (CPVC)
Type BH Special Gas Class IIC (Polypropylene)
* Approved polypropylene systems include:
Durevent Polypro (Single Wall): 2PPS-xxx (2"), 3PPS-xxx (3")
Centrotherm I W: ISxx02xx (2"), ISxx03xx (3")
Refer to manufacturer's literature for detailed information.
** For installation in Canada ld-supplied plastic vent piping must comply
with CAN/CGA B149.1 (latest edition) and be cer
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 ttings. All plastic components a
of the ed 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 cer
of the boiler.
Confirmation of Panel DIP Switch Settings
PCB Dip Switch 2 (Set of 8)
SW Function Setting
1 Temperature Return Water 1-ON
Control
Supply Water 1-OFF
7 Thermostat Unused
or Zone (Permanent
Controller Space
Heating
Demand)
Used
8 Exhaust Temperature
Thermostat Limit Unused
(CPVC)
Setting (PVC) 8-OFF
3
Combustion Air
Maintain 12" min.
clearance above
1" (25mm) min
highest anticipated
snow level or grade.
ent (see below).
to the Standard
s and glues
s part
Front Panel Dip Switch 1 (Set of 10)
SW Function Setting
2 Temperature °C (Celsius)
Unit
°F (Fahrenheit) 2-OFF
3 Well Pump On
7-ON
Off
4 & 5 High Altitude* 0-1,999 ft
(0-609 m)
7-OFF
2,000-5,399 ft
(610-1,645 m)
8-ON
5,400-7,699 ft
(1,646-2,346 m)
7,700-10,100 ft
(2,347-3,078 m)
* Above 2,000 ft (610 m), the boiler will derate by 4% for
each 1,000 ft (305 m) of altitude gain.
Front Panel Dip Switch 2 (Set of 2)
SW Function Setting
2 Gas Type Natural Gas
Propane Gas
2-ON
3-ON
3-OFF
4-OFF,
5-OFF
4-ON,
5-OFF
4-OFF,
5-ON
4-ON,
5-ON
2-OFF
2-ON