Hired-Hand Super-Savers (Forced Air Heaters) XL: Orifice Replacement - Manual (Page 2)

HIRED-HAND, INC. · 1733 Co Rd 68 · Bremen, AL 35033 ·-Phone 1-800-642-0123 · Fax 205-287-2000
Manual Part No. 4801-0135 Page 2 of 4
22) Have a certified gas technician check gas pressure while heater is in operation.
Pressure requirements are printed on the heater’s rating label.
Caution: To be performed by a CERTIFIED GAS TECHNICIAN only!
a) Disconnect heater from power source and turn OFF gas supply going to the
heater.
b) Remove the manifold pressure tap plug from the gas control valve and
connect pressure gauge.
c) Reconnect heater to power source and turn ON gas supply going to the
heater.
d) Return heater to operation and read pressure gauge. Note: To obtain an
accurate manifold pressure reading , the heater must be cycled on and off
several times to stabilize the pressure regulator diaphragm.
e) The gas pressure must be measured with all gas appliances in operation that
use the same gas supply or piping.
f) If necessary, adjust the built-in pressure regulator on the gas control valve to
the acceptable manifold pressure that is found on the ratings plate and page
two of the owner's manual.
g) To adjust the manifold gas pressure, remove the cap screw located on the
top of the pressure regulator.
h) Using a slotted tipped screwdriver, turn the adjustment screw clockwise to
raise manifold gas pressure or counterclockwise to lower manifold gas
pressure.
i) Always replace cap screw and tighten firmly to prevent gas leakage.
j) Disconnect heater from power source and turn OFF gas supply going to the
heater.
k) Remove gas pressure gauge, and reinstall manifold pressure plug.
l) Close side swinging door.
m) Reconnect heater to power source and turn ON gas supply to the heater.
n) Return heater to operation and observe through at least one complete cycle
to ensure all controls are operating properly.
o) Perform gas leak test at outlet pressure tap plug. (A soap-and-water solution
works well.)
27) Return heater to operation.