Schwank P40U Fenwal - Manual (Page 40)

40
P40U-F / P40U-IF I&O Manual
IM101220
RD: MAY 2014
RL: 5A
ORIFICE CHART - ALTITUDE CONVERSION
MODEL NO
FOR USE AT ALTITUDES ABOVE (FEET)
Gas Orifice Drill Size / Part #
Supplied USA Only USA & CANADA*
0 2000 3000 4000 5000 6000 7000 8000
P40U / P40U-I NG
31 DMS
JS-0731-DM
3 mm
JS-0730-MM
32DMS
JS-0732-DM
32DMS
JS-0732-DM
33DMS
JS-0733-DM
34DMS
JS-0734-DM
7/64
JS-0731-IN
36DMS
JS-0736-DM
P40U / P40U-I LPG*
49 DMS
JS-0749-DM
50 DMS
JS-0750-DM
50 DMS
JS-0750-DM
50 DMS
JS-0750-DM
51 DMS
JS-0751-DM
51 DMS
JS-0751-DM
51 DMS
JS-0751-DM
52 DMS
JS-0752-DM
When this appliance is installed above the altitude stipulated below, the input must be de-rated
by 4% for each 1000 ft . If your local utility supplies gas with a de-rated heat content, no
orifice change is required in the heater . Check with your local utility regarding de-rating.
USA: The factory installed orifice for this appliance is approved for altitudes zero to
2000 feet above sea level. Above 2000 feet, refer to table below.
Canada: The factory installed orifice for this appliance is approved for altitudes zero to
4500 feet above sea level. When installed above 4500 feet, refer to the table below
27. HIGH ALTITUDE INSTALLATION
* Field Conversion Kit required to convert between fuel gas types:
 Part number: JS-0555-XB P40U - Natural Gas to Propane Gas Conversion Kit
 Part number: JS-0555-XA P40U - Propane Gas to Natural Gas Conversion Kit