3
Venting
>
Electrical Connections
>
Vent Termination Options
Horizontal vent termination
Interior view
Intake Air
E
xhaust Gas
1
2"
(300mm)
min.
Exterior view
Vertical vent termination
Sidewall vent termination
12"min. from any
obstruction above,
below, left, or right
1
2"
(300mm)
min.
1
2"
(300mm)
min.
3
6
"
(
9
00mm)
min.
Concentric Vent Termination
Sidewall installation
Combustion Air
Combustion Air
1" (25mm) min
Maintain 12" min.
clearance above
highest anticipated
snow level or grade.
Vent
Roof installation
Vent
Vent
Combustion Air
Maintain 12" min.
(18" min. for Canada)
clearance above
highest anticipated
snow level maximum
of 24" above roof.
Combustion
Air
Venting Length
3” pipe venting
2” pipe venting
8
1
3
7
2
Maximum Length 150'
Maximum number
of elbows: 8
2-to-3-inch
6
1
3
4
5
2
Maximum number
of elbows: 6
Maximum Length 60'
e
90˚ elbow = 5 linear feet of venting
e
45˚ elbow= 3 linear feet of venting
e
90˚ elbow = 8 linear feet of venting
e
45˚ elbow= 4 linear feet of venting
Exhaust Vent Piping Materials
e
All Navien boilers are Category IV appliances.
e
The venting system should be approved for use with Category IV appliances (typically Type B
H
Special Gas Vent approved by UL 1738-S636).
e
Venting requirements in the USA and Canada are different (see below).
Navien recommended venting materials
Locale
Recommended Vent Materials
USA
e
PVC Schedule 40(Solid core)
e
PVC Schedule 40 or 80(Solid core)
e
Approved Polypropylene*
Canada**
e
Type B
H
Special Gas Vent Class IIA (PVC)
e
Type B
H
Special Gas Vent Class IIB (CPVC)
e
Type B
H
Special Gas Class IIC (Polypropylene)
* Approved Polypropylene Systems include:
t%VSBWFOU1PMZQSP 4JOHMF8BMM7FOU114YYY7FOU114YYY
t$FOUSPUIFSN*OOP'MVF487FOU*4YYYY7FOU*4YYYY
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 B
H
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.
External LWCO Connection
(if required by local codes)
Power Connection
C
N
23
C
N1
0
C
N
24
C
N
25
C
o
mm
o
n
H
ot
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.
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.
CAUTION
Disconnect the power to
the boiler before installing
any wire connections on
the main PCB.
Safety
DO NOT touch
the power
cord with wet
hands.
DO NOT allow
the boiler to be
exposed to
excessive
amounts of
water.
Confirmation of Panel DIP Switch Settings
PCB Dip Switch 2 (Set of 8)
Front Panel Dip Switch 1 (Set of 10)
SW
Function
Setting
1
Temperature
Control
Return
Water
1-ON
Supply
Water
1-OFF
7
Thermostat
or Zone
Controller
Unused
(Permanent
Space
H
eating
Demand)
7-ON
Used
7-OFF
8
E
xhaust
Thermostat
Temperature
Limit
Unused
(CPVC)
8-ON
Setting
(PVC)
8-OFF
SW
Function
Setting
2
Temperature
Unit
°C (Celsius)
2-ON
°F (Fahrenheit)
2-OFF
3
Well Pump
On
3-ON
Off
3-OFF
4 & 5
H
igh
Altitude*
0-1,999 ft
(0-609 m)
4-OFF,
5-OFF
2,000-5,399 ft
(610-1,645 m)
4-ON,
5-OFF
5,400-7,699 ft
(1,646-2,346 m)
4-OFF,
5-ON
7,700-10,100 ft
(2,347-3,078 m)
4-ON,
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
Gas
2-ON
