5
110328-02 - 6/22
ALTA
Installation, Operating & Service Instructions
Table 3-3: Air Intake and Vent Lengths
Model Number
Intake/Vent Size in. (mm)
Min Length
ft. (m)
Max Length
ft. (m)
Approx. Derate at
Max. Length (%)
ALTA-120
Standard
2 (60)
2.5 (0.76)
70 (21.3)
7
w/ increaser
3 (80)
2.5 (0.76)
135 (41.1)
1
ALTA-150
ALTA-180
Standard
2 (60)
2.5 (0.76)
70 (21.3)
9
w/ increaser
3 (80)
2.5 (0.76)
135 (41.1)
5
Table 3-4: Inlet Gas Pressure Range
Min in. wc (kPa)
Max in. wc (kPa)
Natural Gas
2.5 (0.62)
14.0 (3.48)
LP Gas
8.0 (1.99)
3
Specifications
(continued)
Table 3-5: Weights and Volume
Electrical Requirements
: 120 VAC, 60 Hz, 1-ph. 1.8A for boiler and pump + current draw of any external pumps
connected to boiler.
Controls
: Boiler flow switch and integrated manual reset high limit provided with boiler are both UL-353 listed.
LP Gas Conversion
: Boiler is shipped from factory configured for natural gas and is field convertible to LP gas. See
Section 14 Start-up and Checkout for instructions to convert to LP gas.
Altitude
: Only part no. ending in -00 (i.e. ALTA-180-1G
00
) is listed for 0 to 10,100 ft. (3,079 m). See Section 14
Start-up and Checkout for altitude conversion instructions.
For part no. ending in -02 (i.e. ALTA-180-1G
02
), boiler is listed for 0 to 2,000 ft. (610 m). Do not install above 2,000
ft. (610 m).
Model
Number
Shipping
Weight lb.
(kg)
Empty
Boiler
Weight lb.
(kg)
Shipping
Crate D in.
(mm)
Shipping
Crate W in.
(mm)
Shipping
Crate H in.
(mm)
Water
Content
gal (L)
Heat
Exchanger
Surface Area
ft
2
(m
2
)
ALTA-120
112 (51)
76 (35)
41.4 (1050) 20.0 (508) 18.3 (465) 0.75 (2.8)
11.99 (1.11)
ALTA-150
132 (60)
103 (47)
41.4 (1050) 20.0 (508) 22.3 (567)
1.0 (3.8)
17.98 (1.67)
ALTA-180
132 (60)
103 (47)
41.4 (1050) 20.0 (508) 22.3 (567)
1.0 (3.8)
17.98 (1.67)
Air Intake
Vent
Front View
Low Voltage
Knockouts
Boiler
Supply
Boiler
Return
120 VAC
Knockouts
Gas
Condensate Trap
Cleanout
Condensate Drain
Bottom View
REVISIONS
REV.
EN
DATE
DESCRIPTION
DWN
CHK
APVD
A
103-143-14599
9/3/2021
PRODUCTION RELEASE
EJL
TITLE:
FIRST USE:
ITEM NUMBER:
MATERIAL:
ALTA
GENERAL CONFIGURATION
HEAT ONLY UNITS
DES: EJL
CHK: ---
APVD: ---
SCALE: 1:10
SIZE: A
SHEET: 1 OF 1
DATE:
REVISION:
DRAWING NUMBER:
09/03/2021
TS-103-62
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
A
A
B
B
2
2
1
1
Figure 3-6: Boiler Connections
Air Intake
Vent
Front View
Low Voltage
Knockouts
Boiler
Supply
Boiler
Return
120 VAC
Knockouts
Gas
Condensate Trap
Cleanout
Condensate Drain
Bottom View
REVISIONS
REV.
EN
DATE
DESCRIPTION
DWN
CHK
APVD
A
103-143-14599
9/3/2021
PRODUCTION RELEASE
EJL
TITLE:
FIRST USE:
ITEM NUMBER:
MATERIAL:
ALTA
GENERAL CONFIGURATION
HEAT ONLY UNITS
DES: EJL
CHK: ---
APVD: ---
SCALE: 1:10
SIZE: A
SHEET: 1 OF 1
DATE:
REVISION:
DRAWING NUMBER:
09/03/2021
TS-103-62
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
A
A
B
B
2
2
1
1
