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a.
Seal any unused openings in the venting system.
b.
Inspect the venting system for proper size and horizontal
pitch, as required in the National Fuel Gas Code, NFPA 54/
ANSI Z223.1 or CSA B149.1 Installation Code - Latest Edition
and these instructions. Determine that there is no blockage
or restriction, leakage, corrosion, or other deficiencies, which
could cause an unsafe condition.
c.
As practical, close all building doors and windows and all
doors between the space in which the appliance(s) connect-
ed to the venting system is (are) located and other spaces
of the building. Turn on clothes dryers and any exhaust
fans such as range hoods and bathroom exhausts, so they
shall operate at maximum speed. Do not operate a summer
exhaust fan. Close fireplace dampers.
d.
Follow the lighting instructions. Place the appliance being
inspected in operation. Adjust the thermostat so that the
appliance will operate continuously.
e.
After it has been determined that each appliance connected
to the venting system properly vents when tested as outlined
above, return doors, windows, exhaust fans, fireplace damp-
ers and any other gas-burning appliance to their previous
conditions of use.
f.
If improper venting is observed during any of the above tests,
the venting system must be corrected.
23. After confirming the proper operation of the heater, replace the
access panel.
24. Should overheating occur, or the gas supply control system fail
to shut off the flow of gas, shut off the manual gas valve to the
heater before shutting off the electrical supply.
25. Do not use this heater if any part has been under water. Immedi-
ately call a qualified service technician to inspect the heater and
replace any gas control which has been under water.
PROPANE AND HIGH ALTITUDE INSTALLATION
All models are certified by ETL at elevations of 0' - 2000' (0-610m),
2,001' - 5,400' (610.5m-1,645m), 5,401' - 7,800' (1645.5m-2,377m)
and 7,801' - 10,100' (2,377.5m-3,078m). The input rating in this
manual is for 0' - 2,000' (0-610m). If a unit is to be installed at an
elevation above 2,000' (610m), the following instructions must be
followed. Included with every heater is a high altitude label that must
be filled in with permanent marker and attached to the heater next to
the name plate.
Natural Gas High Altitude Adjustments and Conversion Kits
Table 8 lists the required manifold pressure, and pressure switch
setting if different than sea level (factory) and orifices for high altitude
natural gas installations. Orifices do not need to be changed on any
model for high altitude. Pressure switches will need to be purchased
from the factory. Part numbers are listed in the "Replacement Parts"
section of this manual.
Propane Conversions and Propane High Altitude Information
Table 9 lists the required manifold pressure, pressure switch setting
if different than sea level (factory) and orifices for all elevations for
propane. Follow the instruction sheet included with the propane
conversion kit on how to convert from natural gas to propane.
Refer to the Parts Table for "Conversion Kits" part numbers. Contact
your local sales representative or Customer Service for availability.
Refer to the "Operation" section of this manual to properly
adjust the heater.
Table 8 - Natural Gas High Altitude Information and Conversion
Model
HSU100 100,000
HSU125 125,000
HSU150 150,000
HSU200 200,000
HSU250 250,000
HSU300 300,000
HSU400 400,000
Model
HSU100 100,000
HSU125 125,000
HSU150 150,000
HSU200 200,000
HSU250 250,000
HSU300 300,000
HSU400 400,000
Model
HSU100 100,000
HSU125 125,000
HSU150 150,000
HSU200 200,000
HSU250 250,000
HSU300 300,000
HSU400 400,000
14
Compact Unit Heater
TABLE 8.1
High Altitude Information NG Units:
2,001' to 5,400' (610m to 1,645m)
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
TABLE 8.2
High Altitude Information NG Units:
5,401' to 7,800' (1,645.5m to 2,377m)
NG Manifold
Btu/Hr
Pressure
Input
(in. w.c.)/(kPa)
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
3.5/0.87
TABLE 8.3
High Altitude Information NG Units:
7,801' to 10,100' (2,377m to 3,078m)
NG Manifold
Btu/Hr
Pressure
Input
(in. w.c.)/(kPa)
3.5/0.87
3.5/0.87
3.5/0.80
3.5/0.87
3.5/0.82
3.5/0.87
3.5/0.87
Operating Instructions and Owner's Manual
Orifice
N/A
#42 (4)
N/A
#42 (5)
N/A
#42 (6)
N/A
#38 (7)
N/A
#37 (8)
N/A
#36 (9)
-1.41
#36 (12)
Orifice
Pressure
Drill Size
Switch
(Quantity)
-0.72
#42 (4)
N/A
#42 (5)
N/A
#42 (6)
N/A
#38 (7)
-1.07
#37 (8)
N/A
#36 (9)
-1.32
#36 (12)
Orifice
Pressure
Drill Size
Switch
(Quantity)
-0.72
#42 (4)
-0.72
#42 (5)
-0.72
#42 (6)
-0.72
#38 (7)
-1.07
#37 (8)
N/A
#36 (9)
-1.32
#36 (12)
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