U.S. Boiler Company ALTA Quick Start Manual

"Quick Start" Guide
IMPORTANT PRE-START CHECKS: Follow combi boiler fill (and other) instructions in the ALTA Boiler Installation, Operating and Service
instructions (I,O&S). Inspect and correct all water lines, gas lines, wiring, venting and associated connections. Follow instructions to purge all
air from the heat exchanger and system piping with the hose provided. DO NOT OPERATE boiler with LP gas UNLESS you complete the two-
step LP conversion process per the instructions. Do not install this combi boiler model over 2000 ft. (610 m) altitude.
TIME-SAVING NOTE: Gas valve throttle screw and offset adjustments are not required for start up. This combi boiler adapts to heating requirements
with a self-calibrating, "gas adaptive" control that monitors flame ionization to automatically adjust the gas valve to a correct air-fuel ratio.
Start a call for domestic hot water (DHW)
and observe the display.
NOTE: Combi Boiler fires ten seconds after
1.
DHW call. If combi does not light after two
tries, the boiler will enter a "soft lockout"
for one hour. For fast reset:
• Interrupt power for three seconds
• Re-connect power and restart
• Press
• Watch for flame icon
+
–
Check gas pressure at valve inlet test port.
2.
Verify that the inlet gas pressure is between the
minimum and maximum gas pressures shown on
the rating plate when operating at maximum gas
input rate and when all gas appliances (including
the boiler) are both on and off.
Safety Check: Combustion
• Verify combi boiler is running over 50% firing rate
3.
• Close combi boiler front door and wait five minutes
• Insert combustion analyzer probe into test port.
• Measure carbon monoxide (CO)
• If CO is under 200ppm, combustion check is complete
• If CO exceeds 200ppm, follow troublehooting in I,O&S
• Replace test port cap into test port
Safety Check: Ignition Safety Shut-Off
4.
• When boiler is running, carefully unplug black electrode/
flame sensor wire at burner door using insulated pliers.
• The burner should shut off immediately.
• Reconnect black electrode/flame sensor wire.
Quick Menu and Commands
See separate instruction card (110493-01) for these additional advanced menus:
Password, History, Diagnostic, Firing Rate, Setpoints, Pump, Lead/Lag
+
Press
buttons
–
to adjust
parameters
Press and hold for three seconds
to access Adjust Mode
Press to exit current menu or
cancel current editing session
button to reset
reset lockout
High Efficiency, "Hang and Heat" Combi Boiler
Without a DHW/Heat call
(Stand-by)

GAS PRESSURE REQUIREMENTS (0-2,000 ft. only)
Min: 2.5 in.wc (natural gas), 8.0 in.wc (L.P. gas)
Press
buttons to
view next
menu or
parameter
Press to select menu
or parameter to edit
Model ALTAC-136
95% AFUE, 10:1 turndown
During DHW call
(While running)
Flame icon appears
last, after start up
protocol is complete
and after boiler is
running.
Max: 14.0 in.wc
A
Quick Menu
a01 Boiler Switch: On/Off
a02 DHW Comfort Mode: On/Off
DHW Setpoint:
a03
(60°F to 140°F, 16°C to 60°C)
Central Heat 1 Setpoint:
a04
(60°F to 190°F, 16°C to 88°C)
Central Heat 2 Setpoint:
a05
(60°F to 190°F, 16°C to 88°C)
When not flashing or alternating, this
temperature is:
• DHW outlet temperature during DHW priority
• Boiler supply temperature at all other times
Visible when Central Heating demand is
present
Visible when DHW heating demand is present,
icon will flash if DHW setpoint is being
adjusted
Visible when burner is firing, icon adjacent to
active priority
Visible when DHW Comfort Mode is selected
Visible when Central Heating setpoint reset is
enabled
Visible when adjust mode is active, icon will
flash if manual mode is enabled
Visible when manual reset lockout is active
Default
On
Off
120°F
49°C
180°F
83°C
180°F
83°C