Supplemental Manual
32
HE+ Series 1-Stage Supplemental Manual
-Refer to chart below for Restrictions
When installed above the altitude stipulated below for USA, the input must be de-rated by 4% for
each 1000 ft above the altitude listed. Refer to the tables below for orifice size and restrictions that
apply to high altitude installation (including total system length restrictions). Check with your local
utility regarding the gas supply and the de-rating of this appliance. Maintain gas supply pressure
indicated in Section 4.
The factory installed orifice for this appliance is approved for altitudes zero to 2000 feet
above sea level.
1. Do not install at altitudes greater than 8,500 ft
2. Restrict the length of any model to the shortest tube length at altitudes greater than 4,500 ft
When this appliance is installed above the altitude stipulated in the Table below, the input must be
de-rated by 4% for each 1000 ft of altitude. -
. Check with your local utility regarding de-
rating, and the following specifically for country of installation.