U.S. Boiler Company ALTA ALTAC-136 User 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
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 button to reset
• Watch for flame icon
During DHW call
(While running)
1.
2.
Check gas pressure at valve inlet test port.
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.
GAS PRESSURE REQUIREMENTS (0-2,000 ft. only)
Max: 14.0 in.wc
Min: 2.5 in.wc (natural gas), 8.0 in.wc (L.P. gas)
4.
Safety Check: Ignition Safety Shut-Off
• 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.
3.
Safety Check: Combustion
• Verify combi boiler is running over 50% firing rate
• 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
Without a DHW/Heat call
(Stand-by)
Flame icon appears
last, after start up
protocol is complete
and after boiler is
running.
reset lockout

Model ALTAC-136
High Efficiency, “Hang and Heat” Combi Boiler
95% AFUE, 10:1 turndown
Press
buttons
to adjust
parameters
+
–
Press
buttons to
view next
menu or
parameter
Press and hold for three seconds
to access Adjust Mode
Press to select menu
or parameter to edit
Press to exit current menu or
cancel current editing session
Quick Menu and Commands
See separate instruction card (110493-01) for these additional advanced menus:
Password, History, Diagnostic, Firing Rate, Setpoints, Pump, Lead/Lag 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
+
–
AQuick Menu Default
a01 Boiler Switch: On/Off On
a02 DHW Comfort Mode: On/Off Off
a03 DHW Setpoint:
(60°F to 140°F, 16°C to 60°C)
120°F
49°C
a04 Central Heat 1 Setpoint:
(60°F to 190°F, 16°C to 88°C)
180°F
83°C
a05 Central Heat 2 Setpoint:
(60°F to 190°F, 16°C to 88°C)
180°F
83°C

Illustrations are for representation only. Improperly located vent can damage property;
Before cementing external vent terminations, complete all preparation
and run start up tests per I,O&S Instructions.
Improper installation, adjustment, alteration, service or maintenance can cause severe personal injury,
death, or substantial property damage. For assistance or additional information, consult a qualified
installer, service agency, or the gas supplier. This boiler requires a special venting system. Read
Installation, Operating and Service Instructions carefully before installing.
WARNING
NEAR BOILER HEAT PIPING
Install
NO OTHER
VALVES
between safety relief
valve and boiler
NEAR BOILER DOMESTIC HOT WATER PIPING
Approximate derates at maximum lengths:
2”-7%, 3”-1%
DHW OUTLET
w/connector
DHW INLET
w/connector
Installation Tips Model ALTAC-136
High Efficiency, “Hang and Heat” Combi Boiler
95% AFUE, 10:1 turndown

Vent/Air
Size-Inches
(mm)
Minimum
Equivalent
Length-Feet
(m)
Maximum
Equivalent
Length-Feet
(m)
2 (60) 2.5 (0.76) 70 (21.3)
3 (80) 2.5 (0.76) 135 (41.1)
SELECT
Horizontal 2-pipe
low profile
Horizontal 2-pipe
concentric
Horizontal 2-pipe
(up to 7’ separation)
Hybrid
roof and wall

vent length & diameter UNPACK
universal connector, lubricate heat
exchanger gasket, install connector
SELECT
vent termination
For more vent termination options and complete
venting information, see I,O&S Instructions.
Do not mount components on
either of the side access panels
(shown removed)
Fast preventative maintenance:
Only four nuts, one gas fitting, one wire to deep heat
exchanger access
WALL MOUNT QUICK DRILLING GUIDE:
Allow these clearances from 5/16” wall mount
bracket holes or consult boiler I,O&S Instructions if
tighter spacing is needed.
26” Min.
26” Min.
26” Min.
56” Min.
LP gas conversion:
1. Turn switch 90° with 2.5mm hex wrench
2. Set fuel gas selection at boiler display
Switch
Direction
Switch
Direction
• Install standard 3/4” PVC to trap drain
• Attach Alta FastPipe (primary/secondary header-included w/boiler)
• Insert dirt and magnetic filters before return
• Attach G 1/2” (BSSP) DHW connectors (2-included) to 3/4” elbows
pointed to rear for best clearance
• Install DHW pressure relief valve in outlet piping
• Install ASSE 1017 or ASSE 1070 listed mixing valve
NOTE
All piping is field-supplied
except where noted below
110492-01
Position 1 Position 2