Manual 2100-365
Page 22
19. MANIFOLD PRESSURE
ADJUSTMENT
You will need a 0 to 15 inch water manometer with 0.1
inch resolution and a 1/8" NPT manual shutoff valve to
measure actual manifold pressure.
Depending on your local gas heating value and
elevation, you may need to adjust manifold pressure or
change orifices to get proper gas input rate. Check
with your local gas supplier to determine heating value
(BTU/cu. ft.) of natural gas in your area.
NOTE: If furnace is being installed at an altitude of
more than 6,000 feet above sea level, you
must derate the furnace. See Section 21
"Standard Orifice Sizing and High Altitude
Derate".
20. CHECKING GAS INPUT RATE
It is the installer's responsibility to see that the BTU
input rate of the furnace is properly adjusted. Under-
firing could cause inadequate heat, excessive
condensation or ignition problems. Overfiring could
cause sooting, flame impingement or overheating of
heat exchanger.
8. Adjust manifold pressure by turning gas control
regulator adjusting screw clockwise to increase
pressure or turning counterclockwise to decrease
pressure. Manifold pressure must be within
allowable range below:
•
Natural gas manifold pressure must be between
3.2 and 3.8 inches W.C. Rated pressure is 3.5
inches.
•
Propane gas (LP) manifold pressure must be
between 9.7 and 10.3 inches W.C. Rated
pressure is 10 inches.
NOTE: For natural gas, if gas flow rate can't be
properly set within these pressure ranges
then you must change main burner orifices to
obtain proper gas flow rate.
9. Shut off furnace. Turn off gas at equipment shutoff
valve in gas supply line just ahead of furnace.
Install outlet pressure tap plug in gas control. Turn
on gas.
10. Check regulator adjustment cover screw and gas
control plug for gas leaks. Use a commercial soap
solution made for leak detection.
1. Turn off gas at equipment shutoff valve in gas
supply line just ahead of furnace.
2. Remove plug from outlet pressure tap in gas control
or gas manifold.
3. Install 1/8" NPT manual shutoff valve in hole
vacated by plug. Make sure shutoff valve is in off
position.
4. Attach manometer to 1/8" NPT manual shutoff
valve just installed.
5. Slowly open equipment shutoff valve in gas supply
line just ahead of furnace. Start furnace following
"Operating Instructions" on front door.
6. Slowly open 1/8" NPT manual shutoff valve leading
to manometer.
7. Read manifold pressure on manometer.
PROPANE (LP) GAS CONVERSION
This unit may be converted in the field for
use with Propane (LP) gas. Propane gas
conversion kit number WGCK-1 is designed
for conversions of units installed from
0 – 6,000 feet elevations. Propane gas
conversion kit number WGCK-2 is designed
for conversions of units installed from 6,001
– 10,000 feet elevations. These kits may be
purchased from your local dealer.
WARNING
Correct manifold pressure is necessary for
proper ignition and burner operation. Failure
to accurately adjust pressure could cause
heat exchanger failure.
WARNING
Failure to adjust furnace to the proper firing
rate could cause heat exchanger failure.
Summary of Contents for WG241
Page 12: ...Manual 2100 365 Page 9 FIGURE 2 MOUNTING INSTRUCTIONS FOR WG24 WG30 AND WG36 MIS 1681...
Page 13: ...Manual 2100 365 Page 10 FIGURE 2A MOUNTING INSTRUCTIONS FOR WG42 WG48 AND WG60 MIS 1472...
Page 16: ...Manual 2100 365 Page 13 FIGURE 6 COMMON WALL MOUNTING INSTALLATIONS MIS 1474...
Page 22: ...Manual 2100 365 Page 19 FIGURE 11 LOW VOLTAGE WIRING MIS 1719...
Page 23: ...Manual 2100 365 Page 20 FIGURE 12 GAS PIPE CONNECTION MIS 1683...
Page 33: ...Manual 2100 365 Page 30 26 LIGHTING AND SHUTDOWN INSTRUCTIONS FIGURE 15 INSTRUCTION LABEL...
Page 50: ...Manual 2100 365 Page 47 WG241 A 230 208 60 1...
Page 51: ...Manual 2100 365 Page 48 WG241 A 230 208 60 1...
Page 52: ...Manual 2100 365 Page 49 WG241 B 230 208 60 3...
Page 53: ...Manual 2100 365 Page 50 WG241 B 230 208 60 3...
Page 54: ...Manual 2100 365 Page 51 WG241 C 460 60 3...
Page 55: ...Manual 2100 365 Page 52 WG241 C 460 60 3...
Page 56: ...Manual 2100 365 Page 53 WG301 A WG361 A 230 208 60 1...
Page 57: ...Manual 2100 365 Page 54 WG301 A WG361 A 230 208 60 1...
Page 58: ...Manual 2100 365 Page 55 WG301 B WG361 B 230 208 60 3...
Page 59: ...Manual 2100 365 Page 56 WG301 B WG361 B 230 208 60 3...
Page 60: ...Manual 2100 365 Page 57 WG301 C WG361 C 460 60 3...
Page 61: ...Manual 2100 365 Page 58 WG301 C WG361 C 460 60 3...
Page 62: ...Manual 2100 365 Page 59 WG422 A 230 208 60 1...
Page 63: ...Manual 2100 365 Page 60 WG422 A 230 208 60 1...
Page 64: ...Manual 2100 365 Page 61 WG422 B 230 208 60 3...
Page 65: ...Manual 2100 365 Page 62 WG422 B 230 208 60 3...
Page 66: ...Manual 2100 365 Page 63 WG422 C 460 60 3...
Page 67: ...Manual 2100 365 Page 64 WG422 C 460 60 3...
Page 68: ...Manual 2100 365 Page 65 WG481 A WG601 A 230 208 60 1...
Page 69: ...Manual 2100 365 Page 66 WG481 A WG601 A 230 208 60 1...
Page 70: ...Manual 2100 365 Page 67 WG481 B WG601 B 230 208 60 3...
Page 71: ...Manual 2100 365 Page 68 WG481 B WG601 B 230 208 60 3...
Page 72: ...Manual 2100 365 Page 69 WG481 C WG601 C 460 60 3...
Page 73: ...Manual 2100 365 Page 70 WG481 C WG601 C 460 60 3...