10757-UAI-B-1204
Unitary Products Group
3
crooked on bracket, bracket not bent or loose on main
burner).
8.
Adjust the manifold pressure to the required IWG with
gas supplied to the unit at a pressure of 7 to 10.5 inches
WC.
9.
If burning at the orifices, excessive yellow tipping, or
excessive noise is observed during any phase of main
burner operation, adjust the main burner air shutters
(See Figure 1) to eliminate the problem(s).
10. With main burners ignited, check for gas leaks, espe-
cially in the following locations: pilot tubing connection at
the pilot, pilot tubing connection at the gas valve, gas
valve inlet and outlet connections, manifold union in the
burner compartment, and main burner orifices where
they thread into the manifold. Repair any leaks found,
and recheck. DO NOT CHECK WITH OPEN FLAME.
11. With main burners off, disconnect the manometer and
replace the manifold plug. Check for gas leaks at this
plug.
12. Remove jumpers and replace all access panels.
Manifold pressure for the respective BTU/HR input or out-
put must be adjusted to the IWG as specified on the ori-
fice label (035-07981) located on the inside of the unit gas
heat access panel.
FIGURE 1 - MAIN BURNER, PILOT TUBE, GAS
MANIFOLD AND ADJUSTABLE SHUTTERS
PARTS SUPPLIED WITH THIS ACCESSORY
ITEM
QTY.
PART NO.
DESCRIPTION
1
8
9584
Burner Orifice, #31
2
2
9570
Pilot Orifice, #60
3
2
9571
Pilot Orifice, #61
4
2
9574
Pilot Orifice, #66
5
1
10433
High Altitude Conversion Label (to
4,500 ft.)
6
1
10434
High Altitude Conversion Label (to
6,000 ft.)
7
1
10561
Conversion/Modification Label
8
1
10757
Accessory Instruction Form
