Operating Information - American Standard GRWF130A94A0A Installation Manual

Energize gas valve by setting thermostat
above room temperature.
f) Adjust manifold gas pressure, as
needed, to achieve desired input capacity.
To accomplish this, turn the adjustment
screw clockwise to increase the gas fl ow
rate and counterclockwise to decrease the
gas fl ow rate using an fl at-head screwdri-
ver. See Figure 58.
g) The fi nal manifold pressure setting
shall be no more than 3.6" W.C. with an
input of no more than nameplate rating
and no less than .7" W.C. of the nameplate
rating.
h) Turn off electrical power to the boiler.
Close manual On/Off gas valve.
i) Remove the manometer fl exible tubing
from outlet pressure port and close the
outlet pressure port using a screwdriver.
See Figure 56.
j) Replace the regulator adjustment screw
cap and tighten securely.
k) Open manual On/Off gas valve and
then turn on electrical power to the boiler.
l) Using a soap solution, check for gas
leaks at the pressure ports and manifold
adjustment cover.
▲ ▲
SAFETY HAZARD
REPLACE AND/OR TIGHTEN ALL PLUGS REMO-
VED WHEN ADJUSTING GAS PRESSURE. LEAK
CHECK THE FITTING BEFORE PLACING THE
BOILER INTO REGULAR SERVICE. FAILURE
TO FOLLOW THIS WARNING COULD RESULT
IN FIRE, EXPLOSION, OR PROPERTY DAMAGE.
IMPROPER INSTALLATION, MAINTENANCE
OR SERVICING COULD RESULT IN SERIOUS
INJURY, DEATH, OR PROPERTY DAMAGE.
For LP gasses, the fi nal manifold pressure setting
shall be 10.6" W.C. with an input of no more than
the nameplate rating and not less than .7" W.C. of
the nameplate rating, unless the unit is derated for
altitude.
WARNING
!
▲
!
If, after correctly carrying out the lighting procedure,
the burners do not light and the red pushbutton light on
the control panel comes on, wait about 15 seconds and
then press the pushbutton to reset. The reset controller
will repeat the ignition cycle. If the burners do not light
after the second attempt, consult the Service Facts
"Troubleshooting" section.
NOTE: In case of an electrical power failure while the
boiler is working, the burners will go out and re-ignite
automatically when power is restored.
Determine that the water pump(s) are operating
properly.
Test low water cutoffs, automatic feed controls, pressure,
and temperature limit controls, and relief valves to
determine they are in operating condition.

4.2 Operating Information

Conditions Affecting System Operation
1. FLUE BLOCKAGE
If the fl ue is blocked, the induced draft power
switch will not close preventing ignition.
2. LOSS OF FLAME OR GAS SUPPLY
FAILURE
If loss of fl ame occurs during a heating cycle
(when fl ame is not present at the sensor), the
control module will retry the ignition sequence
one time after the sensor cools. If ignition is not
achieved, it will lockout the boiler.
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.
CAUTION
18-CG02D1-4
37