High Altitude Derate; Lighting Instructions - American Standard GRWF130A94A0A Installation Manual

Figure 27

3.9 High Altitude Derate

This boiler is designed to operate up to altitudes of
2000 feet without any adjustments. At altitudes
from 2000 to 4500 feet, the manifold pressure must
be adjusted according to the table. Table 10 shows
the maximum manifold pressures for both natural
gas and propane gas at the varying altitudes. At
altitudes below 4500 feet, no orifi ce tube changes are
required.
Table 10 - High Altitude Applications
Altitude
Model
*GBWF090A93AVA
*GBWF130A94AVA
*GBWF173A95AVA
*GBWF215A96AVA
*GRWF130A94A0A
NOTES: 1. * May be "A" or "T"
2. No orifi ce change is required up to 4500 Feet.

3.10 Lighting Instructions

▲ ▲
WARNING
!
DO NOT ATTEMPT TO MANUALLY LIGHT THE
BURNER. THIS BOILER IS EQUIPPED WITH
AN ELECTRONIC (SPARK TO PILOT) IGNITION
SYSTEM.
FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN SERIOUS INJURY, DEATH, OR PRO-
PERTY DAMAGE.
Each installation must be checked out at the
time of initial start up to insure proper ope-
ration of all componinet. Check out should
include putting the unit through one complete
cycle as outlined in the following.
Turn on the main electrical supply and set the ther-
mostat above the indicated temperture. The electro-
nic ignition control will automatically generate a
spark, then the gas valve is energized to permit the
fl ow of gas to the burners. After ignition and fl ame
is established, the fl ame control module monitors the
fl ame and supplies power to the gas valve until the
10.6
0-2000 Feet Altitude
Gas Maximum Heat Input
Type manifold Maximum
pressure (BTU/h)
(In. W.C.)
NG 3.6 90,000
LP 10.6
NG 3.6 130,000
LP 10.6
NG 3.6 173,000
LP 10.6
NG 3.6 215,000
LP 10.6
NG 3.6 130,000
LP 10.6
thermostat is satisfi ed.
The control will attempt to light for 51 seconds and
then lock out. To restart the ignition sequence, the
reset button must be depressed. After three manual
resets within 15 minutes, the control module will go
into a hard lockout. To restart the ignition sequence,
power to the boiler must be turned off and then on
before the ignition sequence can start again.
2001-4500 Feet Altitude
Heat Gas Maximum
Output Type manifold
Maximum pressure
(BTU/h) (In. W.C.)
73,800 NG 2.9
LP 8.5
106,500 NG 2.9
LP 8.5
141,500 NG 2.9
LP 8.5
176,100 NG 2.9
LP 8.5
107,400 NG 2.9
LP 8.5
TO SHUT OFF BOILER
For complete shutdown: Close the manual valve loca-
ted in the supply gas line. Disconnect the electrical
supply to the unit.
Boiler Shutdown in Cold Weather or for Exten-
ded Periods of Time
▲ ▲
If power shutdown is performed during the cold
weather months, provisions must be taken to prevent
freeze-up of all water pipes and water receptacles.
Failure to follow this caution could result in property
damage.
▲ ▲
If the boiler is left operational and unattended for any
extended periods of time, provisions must be taken
periodically to ensure the system operation. This is
especially important in below freezing weather. If for
any reason your boiler should fail to operate, damage
could result, such as frozen water pipes.
Heat Input Heat
Maximum Output
(BTU/h) Maximum
(BTU/h)
80,100 65,700
115,700 94,800
154,000 126,000
191,400 156,800
115,700 95,600
CAUTION
!
CAUTION
!
18-CG02D1-4
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