17
6-534.1
Table 17.1 - High Altitude Kits for PTX/BTX ➀
➀ For Label Only kits(67248), Modine part number 5H0807146005 is
required to be lled out and attached to the unit by the installer. Please
contact the local Modine representative at 1.866.828.4328 (HEAT).
INSTALLATION - HIGH ALTITUDE ACCESSORY KIT
If the heating value of the gas being supplied is different than the values
shown in Tables 16.1 and 16.2, use the following equation to determine the
appropriate manifold pressure for the altitude and gas heating value being
supplied.
Equation 17.1 - Manifold Pressure for Derated Gas
WHERE:
MP
ACT
= Manifold Pressure (in. W.C.) at Altitude –
Manifold pressure setting for the heater being
installed
BTU
TBL
= BTU/ft
3
Content of Gas –
Obtained from Tables 16.1 or 16.2 (whichever is
applicable)
BTU
ACT
= BTU/ft
3
Content of Gas –
Obtained from the local utility company
MP
SL
= Manifold Pressure (in. W.C.), at Sea Level –
Use 3.5" W.C. for natural gas and 10.0" W.C. for
propane gas
NOTE: Only the primary manifold pressure should be adjusted
on units equipped with two-stage or modulating gas controls.
No adjustments to the lowf fire manifold pressure are necessary
on these units.
US and Canada
Altitude (ft)
Model Size
150 175 200 250 300 350
400
Item
Code
Item
Code
Item
Code
Item
Code
Item
Code
Item
Code
I
tem
Code
0-2,000
not re-
quired
not re-
quired
not re-
quired
not re-
quired
not re-
quired
not re-
quired
not re-
quired
2,001-5,500 67248 67248 67248 67248 67248 67248 68413
5,501-6,500 67248 67248 67248 67248 67412 67248 68413
6,501-7,000 67248 67248 67248 67248 68412 67248 68413
7,001-7,500 67248 67248 67248 67248 68412 67248 68413
7,501-8,500 68411 67248 67248 67248 68412 77787 N/A
8,501-10,000 68411 67248 55941 77785 68412 77787
N/A
10,001-11,000 68411 67248 55941 77785 68412 77787
N/A
11,001-12,000 68411 68411 55941 77785 55949 77787
N/A
12,001-13,000 68411 68411 55941 77785 55949 77787
N/A
13,001-14,000 68411 68411 55941 77785 55949 77787
N/A
To Next Page
Loading...
