Alpine Installation, Operating, and Service Instructions

92
103448-10- 6/18
IX. System Start-up (continued)
Example:
Using a meter with dial labeled 1 cubic foot
per revolution, measured time is 72 seconds
for 2 Revolutions, i.e. 36 seconds per 1 cubic
foot.
Calculate hourly gas flow rate:
3600 sec/hr ÷ 36 sec/cu ft = 100 cu ft/hr
5. Obtain gas-heating value
(BTU per cubic
foot) from gas supplier.
6. Multiply hourly gas flow rate by gas heating
value to determine the boiler input rate, BTU/hr
Example:
Natural gas heating value provided by local
gas utility is 1050 BTU per cubic foot.
Measured and calculated hourly gas flow rate
is 100 cu ft/hr.
Measured boiler input rate is:
100 cu ft/hr * 1050 BTU/ cu ft = 105, 000 BTU/
hr
7. Verify measured input rate is within 88% to
100% of the max. input listed on the boiler
rating label.
8. If measured input is too high, reduce
maximum modulation fan speed (either central
heat or domestic hot water, depending on
source of call for heat) in increments of 50 RPM
and check the input rate after each adjustment.
Follow instructions in Section X. “Operation” to
adjust the maximum modulation fan speed.
9. If measured input is too low, increase
maximum modulation fan speed (either central
heat or domestic hot water, depending on
source of call for heat) in increments of 50 RPM
and check the input rate after each adjustment.
Follow instructions in Section X “Operation” to
adjust the maximum modulation fan speed.
10. Return boiler to normal operating mode by
pressing “Auto”.
11. Return other gas-fired appliances to previous
condition of use.
N. Test Safety Limits Controls
1. Test the ignition system safety shut-off by
disconnecting the flame sensor connector
(black plug with orange wire) from the flame
ionization electrode. See Figure 27. The boiler
must shut down and must not start with the
flame sensor disconnected.
2. Test low water cutoffs (if used).
a. Hydrolevel 1100H4 Autotmatic Reset LWCO
(100592-01). Press TEST button to simulate
low water condition. Amber “LOW WATER”
LED should illuminate and burner should
turn off.
b. McDonnell & Miller 751 Manual Reset
LWCO (80160718 ). Press TEST button
for 30 seconds to activate test cycle; red
LED will flash. When test cycle activated
red LED will turn on and burner will turn off.
Control must be reset by pressing MANUAL
RESET to resume normal operation.
3. Test any other external limits or other
controls in accordance with the manufacturer’s
instructions.
O. Check Thermostat Operation
Verify that the boiler starts and stops in response
to calls for heat from the heating thermostat and
indirect water heater thermostat. Make sure that
the appropriate circulators also start and stop in
response to the thermostats.
P. Adjust Supply Water Temperature
As shipped, the heating set point supply temperature
is set to 180°F (82.2°C) and, indirect water heater set
point supply temperature is set to 170°F (76.7°C). If
necessary, adjust these to the appropriate settings for
the type of system to which this boiler is connected.
See Section X “Operation” (Parameter Table 29 on
page 108) of this manual for information on how to
adjust supply setpoint.
Q. Adjust Thermostats
Adjust the heating and indirect water heater
thermostats to their final set points.
R. Field Conversion From Natural Gas to LP Gas
Alpine models ALP080 through ALP285 (-02, 27, 07
altitude code builds.) are factory shipped as natural
gas builds and can be field converted to LP gas.
Alpine models ALP150, ALP210 and ALP285 (-70
altitude code builds) are factory shipped as natural
gas builds but are not permitted to be field converted
to LP gas.
Follow steps below for field conversion from natural
gas to LP Gas.
1. Conversion of Alpine models ALP080B through
ALP285B (-02, 27, 07 altitude code builds) from
one fuel to another is accomplished using the
throttle screw on the gas valve. Figure 37 “Gas
Valve Detail” shows the location of the throttle
screw on the valve. Locate the throttle screw on
the boiler being converted.
2. If conversion is being made on a new
installation, install the boiler in accordance