Manifold Pressure Settings - American Standard 50A65-475 Manual

Manifold Pressure Settings

The 40" gas furnaces are shipped from the factory
for use with natural gas. Conversion to propane
requires a change in the main burner orifices. The
two stage gas valve, 36E96 type 227, used in the
UX/ DX or UY/ DY-R furnace is a dual purpose
valve and does not require a regulator spring change
for LP conversion.
Main Burner
Orifice
Drill Size
45
56
Valve Models
1 36E22-209 White-Rodgers
2 36E96-227 White-Rodgers
3 36E54-201 White-Rodgers
4 36F22-209 White-Rodgers
4 36F22-205 White-Rodgers
1. Single Stage with
Toggle VAL06377
4. Toggle VAL06968
and VAL06969
Type Fuel
NATURAL
PROPANE
Opening
Supplier Characteristics
Single
Fast
Two Stage
Two Stage
Fast1
Slow1
2. Two Stage
First Stage (LO) Manifold
Pressure Adjustment
1 Has toggle switch safety shut off.
2 Remove the slotted screw on top of the gas valve for First Stage
NOTE: It is necessary to adjust the "HI" fire setting to
maximum rate (turn adjustment screw clockwise until
it bottoms) before setting the "LO" propane fire rate,
otherwise the "LO" fire rate of 4.0 – 4.5" W.C. cannot be
set above the 3.5" W.C. natural gas "HI" fire setting.
First letter of models may be an "A" or "T" .
Final Manifold Pressure Setting
First Stage
1.4 – 1.7" W.C.
4.0 – 4.5" W.C.
Factory Outlet Propane
Pressure Settings Convertible
3.0 – 3.5 in W.C. Yes
1.4 – 1.7 in W.C.
3.0 – 3.5 in W.C. Yes
See Note2
1.4 – 1.7 in W.C.
3.0 – 3.5 in W.C. Yes
See Note2
3.0 – 3.5 in W.C. Yes
3.0 – 3.5 in W.C. Yes
VAL04420
6 3
1
ON
OFF
Second Stage (HI) Manifold
Pressure Adjustment
(LO) manifold pressure adjustment. Remove slotted screw on
outlet side for Second Stage (Hl) adjustment. Turn the adjustment
nut clockwise to increase the gas flow rate, and out to decrease
the gas flow using a 3/32" hex wrench.
44
Second Stage
3.0 – 3.7" W.C.
10.5 – 11.0" W.C.
Gas
Valve LP Kit
KIT03831 or
VAL06377
BAYLPKT210A
Dual Purpose Valve
VAL04420 Operates on Natural
or Propane
Dual Purpose Valve
VAL06376 Operates on Natural
or Propane
KIT03831 or
VAL06969
BAYLPKT210A
KIT03831 or
VAL06968
BAYLPKT210A
3. Two Stage with
Toggle VAL06376