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
Consult Installation Operating and Service instructions
(I,O&S) for approximate vent de-rates
Installation Tips
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
NOTE
All piping is field-supplied
111182-02
Position 1
Position 2
Model ALTA-080, ALTA-120B, ALTA-150, ALTA-180
High Efficiency Condensing Boiler
For service access:
first disconnect the spark wire at
the heat exchanger. Gently push the
plastic control enclosure down, then
to the left and allow it swing down into
the service position (as pictured).
NEAR BOILER PIPING: PRIMARY/SECONDARY KIT
Part Number: 111884-01
Boiler Return
from system
Boiler Supply
to system
Boiler Pump*
Dirt & Magentic Filter
(highly recommended)
From
System
Header Temperature Sensor
(when used)
B
A
*Supplied with boiler
A. At least eight (8) pipe diameters upstream of first tee
B. No further apart than 12" or four pipe diameters,
whichever is smaller.
REVISIONS
REV.
EN
DATE
DESCRIPTION
DWN
CHK
APVD
A
A
B
B
2
2
1
1
TITLE:
FIRST USE:
ITEM NUMBER:
MATERIAL:
ALTA
NEAR BOILER PIPING
HEAT ONLY
QUICK-START GUIDE
DES: EJL
CHK:
APVD:
SCALE: 1:10
SIZE: A
SHEET: 1 OF 1
DATE:
REVISION:
DRAWING NUMBER:
11/17/2021
TS-103-70
A
UNLESS OTHERWISE NOTED:
ALL DIMENSIONS IN INCHES.
TOLERANCES:
X.X ±.1 X.XXX ±.005
X.XX ±.03 ANGLE ±1°
PROPERTY OF
U.S. Boiler Company, Inc.
LANCASTER, PA
THIS DOCUMENT CONTAINS CONFIDENTIAL INFORMATION
AND ITS CONTENTS ARE THE SOLE PROPERTY OF U.S. BOILER
COMPANY, INC. ANY REPRODUCTION IN PART OR AS A
WHOLE WITHOUT THE WRITTEN PERMISSION OF U.S. BOILER
COMPANY, INC. IS STRICTLY PROHIBITED.
THIRD ANGLE
PROJECTION
NEAR BOILER PIPING:
CLOSELY SPACED TEES
Install
NO OTHER
VALVES
between safety
relief valve and boiler.
Install in near boiler
piping.
18"
Boiler Pump*
Boiler Return Connection
(1" NPT)
Boiler Supply Connection (1" NPT)
Male Safety
Relief Valve*
(3/4" NPT)
T/P Gauge*
(1/4' NPT)
3/4" x 2" Lg. Nipple*
3/4" x 90 Elbow*
Figure 1: Primary/Secondary Manifold
*Supplied with Boiler
System Return (1 1/4" Sweat)
System Supply (1 1/4" Sweat)
Gasket
Gasket
Pump Flange Gasket*
Pump Flange Gasket*
REVISIONS
REV
EN
DATE
DESCRIPTION
DWN
CHK
APVD
A
103-215-15232
09/30/2022
INITIAL RELEASE.
CWH
SMR
CK
A
A
B
B
4
4
3
3
2
2
1
1
TITLE:
FIRST USE:
ITEM NUMBER:
MATERIAL:
ALTA
GENERAL CONFIGURATION
HEAT ONLY UNITS
DES: EJL
CHK: ---
APVD: ---
SCALE: 1:3
SIZE: B
SHEET: 1 OF 1
DATE:
REVISION:
DRAWING NUMBER:
09/03/2021
TS-103-85
UNLESS OTHERWISE NOTED:
ALL DIMENSIONS IN
MILLIMETERS.
TOLERANCES:
X ±1 X.X ±.5 ANGLE ±1°
PROPERTY OF
U.S. Boiler Company, LLC
LANCASTER, PA
THIRD ANGLE
PROJECTION
THIS DOCUMENT CONTAINS CONFIDENTIAL INFORMATION
AND ITS CONTENTS ARE THE SOLE PROPERTY OF U.S. BOILER
COMPANY, LLC. ANY REPRODUCTION IN PART OR AS A
WHOLE WITHOUT THE WRITTEN PERMISSION OF U.S. BOILER
COMPANY, LLC IS STRICTLY PROHIBITED.
A
A
B
B
4
4
3
3
2
2
1
1
