Electrical Connections; Power Connection - Navien NCB-150E Quick Installation Manual

Venting
Vent Termination Options
Horizontal vent termination
Interior view
Intake Air
Exhaust Gas
Vertical vent termination
12"min. from any
36" (900mm) min.
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

External LWCO Connection
(if required by local codes)
CN23 CN10 CN24 CN25
Common Hot
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
6
8
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 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 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" 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 are different (see below).
Navien recommended venting materials
Locale Recommended Vent Materials
PVC Schedule 40(Solid core)
USA PVC Schedule 40 or 80(Solid core)
Approved Polypropylene*
Type BH Special Gas Vent Class IIA (PVC)
Canada** Type BH Special Gas Vent Class IIB (CPVC)
Type BH Special Gas Class IIC (Polypropylene)
* Approved Polypropylene Systems include:
Refer to manufacture's literature for detailed installation instructions.
** 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 Panel DIP Switch Settings
PCB Dip Switch 2 (Set of 8)
SW Function Setting
1 Temperature Return
1-ON
Control Water
Supply
1-OFF
Water
7 Thermostat Unused
or Zone (Permanent
Controller Space 7-ON
Heating
Demand)
Used 7-OFF
Exhaust
8 Temperature
Thermostat Limit
8-ON
Unused
(CPVC)
Setting
8-OFF
(PVC)
3
Combustion Air
Maintain 12" min.
clearance above
highest anticipated
1" (25mm) min
snow level or grade.
Front Panel Dip Switch 1 (Set of 10)
SW Function Setting
2 Temperature °C (Celsius) 2-ON
Unit
°F (Fahrenheit) 2-OFF
3 Well Pump On 3-ON
Off 3-OFF
4 & 5 High
0-1,999 ft 4-OFF,
Altitude* (0-609 m) 5-OFF
2,000-5,399 ft
4-ON,
(610-1,645 m)
5-OFF
5,400-7,699 ft 4-OFF,
(1,646-2,346 m) 5-ON
7,700-10,100 ft 4-ON,
(2,347-3,078 m) 5-ON
* 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 2-OFF
Propane
2-ON
Gas
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