Schwank STR-JZ Installation & Owner's Manual page 47

28.
HIGH ALTITUDE INSTALLATION
ORIFICE CHART - ALTITUDE CONVERSION
MODEL NO
Supplied
29 DMS
STR-JZ -45 NG
JS-0729-DM
46 DMS
STR-JZ -45 LPG
JS-0746-DM
25 DMS
STR-JZ -60 NG
JS-0725-DM
42 DMS
STR-JZ -60 LPG
JS-0742-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.
FOR USE AT ALTITUDES ABOVE (FEET)
USA Only
0 2000 3000
29 DMS 30DMS
JS-0729-DM JS-0730-DM
46 DMS 46 DMS
JS-0746-DM JS-0746-DM
26 DMS 27 DMS
JS-0726-DM JS-0727-DM
42 DMS 43 DMS
JS-0742-DM JS-0743-DM
Gas Orifice Drill Size / Part#
4000 5000
30DMS 30DMS
JS-0730-DM JS-0730-DM
48 DMS 48 DMS
JS-0748-DM JS-0748-DM
27 DMS 28 DMS
JS-0727-DM JS-0728-DM
43 DMS 43 DMS
JS-0743-DM JS-0743-DM
47
USA & CANADA*
6000 7000
30DMS 31DMS
JS-0730-DM JS-0731-DM JS-0731-DM
48 DMS 49 DMS
JS-0748-DM JS-0749-DM JS-0749-DM
28 DMS 29 DMS
JS-0728-DM JS-0729-DM JS-0729-DM
44 DMS 44 DMS
JS-0744-DM JS-0744-DM JS-0745-DM
STR-JZ I&OManual
RD: AUG 2009
8000
31DMS
49 DMS
29 DMS
45 DMS
IM090831
RL: 09A - BA