ICP C8DNL Installation Instructions Manual - Warning
441 01 2314 06
Specifications are subject to change without notice.
25
Table 6
PROPANE GAS MANIFOLD PRESSURE (in wc)
HEATING VALUE
at ALTITUDE
BTU/CU. FT.
MEAN ELEVATION ABOVE SEA LEVEL − ft(m)
0 to 2000
(0 to 610)
2001 to 3000*
(610 to 914)
*
3001 to 4000
(915 to 1219)
4001 to 5000
(1220 to 1524)
5001 to 6000
(1524 to 1829)
6001 to 7000
(1829 to 2134
)
7001 to 8000
(2134 to 2438)
2500
10.0
10.0
9.0
10.0
9.4
8.5
10.0
Orifice Size
#54
#54
#54
#55
#55
#55
#56
Conversion: 1 in wc = 249 Pa
NOTE:
Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1/NFPA
54−2009 or National Standard Of Canada, Natural Gas And Propane Installation Code CSA B149.1−05.
*
In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design−certified by CSA.
In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (610 to
1372m) above sea level. Use the 2001 to 3000 (610 to 914m) column in Table 5 and Table 6.
The burner orifice part nos. are as follows:
Orifice #41
1096942
Orifice #42
1011351
Orifice #43
1011377
Orifice #44
1011352
Orifice #45
1011353
Orifice #54
1011376
Orifice #55
1011354
Orifice #56
1011355
High Altitude Air Pressure Switch
The factory−installed pressure switch need NOT be changed for
any furnace installations from sea level up to and including 8,000′
(2438m) altitude. See service parts for use above 8,000′ (2438m)
altitude.
Changing Orifices
1. After disconnecting power and gas supply to the furnace, re-
move the burner compartment door, exposing the burner
compartment.
2. Disconnect gas line from gas control valve so manifold can be
removed.
3. Disconnect wiring at gas control valve. Be sure to note the
proper location of all electrical wiring before being discon-
nected.
4. Remove the four (4) screws holding the manifold and gas con-
trol valve to the manifold supports. Do not discard any screws.
See Figure 20.
5. Carefully remove the manifold assembly.
Figure 20
Manifold
25-25-15
Representative drawing only, some models may vary in appearance.
6. Remove the orifices from the manifold and replace them with
proper sized orifices. See Figure 21.
7. Tighten orifices so they are seated and gas−tight. See
Figure 21.
Figure 21
Clearances
Measure from face of orifice to the
back side of the manifold.
1.11″ (28.2mm)
1.21″ (30.7mm)
8. Reassemble all parts in reverse order as removed. Be sure to
engage the main burner orifices in the proper openings in the
burners.
9. After reassembling, turn gas on and check all joints for gas
leaks using a soapy solution. All leaks must be repaired imme-
diately.
Propane Conversion
An accessory kit shall be used to convert to propane gas use, see
the furnace rating plate for the Propane conversion accessory kit
part number.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could
result in personal injury, death and/or property
damage.
NOx inserts for use with Natural Gas units
ONLY. If Propane Gas is required, NOx inserts
must be removed.
!
WARNING
FIRE, EXPLOSION, UNIT DAMAGE HAZARD
Failure to follow this warning could
result in personal injury, death and/or property
damage.
A Propane conversion accessory kit is required
when operating the furnace with Propane gas.
!
WARNING
For Propane conversion remove screws that secure the NOx in-
sert and discard insert.
Reinstall screws. See Figure 22