Installation manual

Altitude Natural Gas Propane
Feet Meters inches w.c.
Manifold Pressure Settings by Altitude for the UNITED STATES
0-2000 0-610 3.5 10.0
2001-3000 611-915 3.1 8.8
3001-4000 916-1220 3.0 8.5
4001-5000 1221-1525 2.8 8.1
5001-6000 1526-1830 2.7 7.7
6001-7000 1831-2135 2.6 7.4
7001-8000 2136-2440 2.5 7.1
8001-9000 2441-2745 2.4 6.7
9001-10000 2746-3045 2.2 6.4
Manifold Pressure Settings by Altitude for CANADA
0-2000 0-610 3.5 10.0
2001-4500 611-1373 2.8 8.1
2. Locate the 1/8” output pressure tap on the valve (See FIGURE 6). Turn the
switch or knob on the top of the valve to “OFF”. Connect a manometer to the
1/8” pipe outlet pressure tap in the valve. Use a water column manometer that
is readable to the nearest tenth of an inch.
NOTE: This adjustment can
only be done after the heater
is in operation. High altitude
adjustment is included in the
startup procedures.
Valve Outlet Pressure
Settings by Elevation
3. Turn the switch or knob on the top of the valve to “ON”. Remove the cap
from the output pressure adjusting screw and adjust the gas train pressure
to the pressure selected from the table above. Adjust pressure by turning the
regulator screw IN (clockwise) to increase pressure or OUT (counterclockwise)
to decrease pressure.
4. Turn up the thermostat. Depress and hold the door safety switch. Cycle the
burner once or twice to properly seat the adjustment spring in the valve.
Re-check the pressure. When the outlet pressure is right for the installation,
remove the manometer and replace the cap.
Check for leak at the pressure tap tting.
5. With the heater operating determine that the inlet pressure to the heater for
natural gas is between 5 and 13.5 inches w.c. and for propane between 10
and 13.5 inches w.c. Take this reading as close as possible to the heater
(Heaters are equipped with gas valves that have an inlet pressure tap.) If the
inlet pressure is not within the specied range, the inlet pressure must be
corrected and Steps 3 and 4 repeated.
6. Find the High Altitude Adjustment label, P/N 197062, in the plastic bag with
this installation manual. Using a permanent marker, ll-in the appropriate
information from the tables below. Select a location for the label on the outside
of the heater access panel so that it will be conspicuous to anyone operating
or servicing the unit. Be sure the surface is clean and dry and adhere the
label.
The input and/or the capacity of the heater changes with the derate. The tables
below (page 12) list inputs and capacities at altitudes from sea level to 10,000 ft
(3045M).
FIGURE 6 - Top
View of Valve
showing Outlet
Pressure Tap
and Adjustment
Locations
1/8”
Output
Pressure
Tap
Inlet
Pressure Tap
Output
Adjustment
Screw
Valve - UEAS 260 & 310
Valve - UEAS 130 & 180
1/8”
Outlet
Pressure
Tap
Inlet
Pressure
Tap
Adjust Outlet
Pressure
Form I-UEAS, P/N 221232 R11, Page 11