Page 4
LGH036-360 Agency
HONEYWELL VR9205 GAS VALVE
NEGATIVE AIR
PRESSURE PORT
POSITIVE AIR
PRESSURE PORT
MANIFOLD
PRESSURE TAP
INLET
OUTLET
SUPPLY
PRESSURE
TAP
GAS VALVE SHOWN IN THE ON POSITION
MANIFOLD PRESSURE ADJUSTMENT
(TURN CCW TO INCREASE PRESSURE)
FIGURE 8
TO GAS
SUPPLY
MANUAL MAIN
SHUT-OFF VALVE
GAS PIPING
SUPPORT
GROUND
JOINT UNION
(REFER TO
LOCAL CODES)
DRIP LEG
OUTSIDE OF UNIT GAS PIPE CONNECTION
TO GAS
VALVE
FIGURE 9
High Alititue Derate
Locate the high altitude conversion sticker in the unit liter-
ature bag. Fill out the conversion sticker and affix next to
the unit nameplate.
Refer to table 1 for high altitude adjustments.
TABLE 1
HIGH ALTITUDE DERATE
Altitude Ft.*
Gas Manifold Pressure
2000-4500
See Unit Nameplate
4500 And Above
Derate 2% / 1000 Ft. Above Sea Level
*Units installed at 0-2000 feet do not need to be modified.
NOTE
- This is the only permissible derate for these units.
DRIP LEG
MANUAL MAIN
SHUT-OFF VALVE
GROUND
JOINT UNION
BOTTOM ENTRY GAS PIPING COMPLETED
7” NIPPLE
STREET
ELBOW
TO GAS
SUPPLY
TO GAS
VALVE
Grommets for both gas pipe openings are field provided.
2-1/2” NIPPLE
FIGURE 10
High Altitude Derate - ULNOx Units
Ultra-Low NOx units are approved for installations from 0
-4500 ft. No modifications are required. Above 2000 ft, the
furnace will naturally de-rate approximately 10%.
Pressure Test Gas Piping
Operating pressures at the unit gas connection must be
as shown in table 2.
TABLE 2
OPERATING PRESSURE AT GAS CONNECTION “w.c
Model
Natural Gas
LP/ Propane Gas
Min.
Max.
Min
Max.
KG/KD 024-090
4.5
10.5
11
13
KG/KD 092-300
4.7
10.5
11
13
When testing the pressure of gas lines, the gas valve must
be disconnected and isolated. Gas valves can be dam-
aged if subjected to more than 0.5 psig.
WARNING
FIRE OR EXPLOSION HAZARD Failure
to follow the safety warnings exactly could
result in serious injury, death or property
damage. Never test for gas leaks with an
open flame. Use a commercially available
soap solution made specifically for the
detection of leaks to check all connections. A
fire or explosion may result causing property
damage, personal injury or loss of life.
