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110327-04 - 1/22
ALTA
Combi Installation, Operating & Service Instructions
Space Heating Ratings
Domestic Hot Water (DHW) Ratings
1
Model
Number
Input
2
(MBH)
DOE
Heating
Capacity
(MBH)
AHRI
Net
Rating
3
(MBH)
AFUE
Input
2
(MBH)
Hot Water Draw Limits GPM (L/min)
2
Min
Max
Min
Max
Max
Min
4
70°F
(39°C)
Rise
77°
(43°C)
Rise
90°F
(50°C)
Rise
ALTAC-136
13.6
120
112
97
95.0
13.6
136
3.7 (14)
3.4 (13)
2.9 (11) 0.5 (2)
ALTAC-200
20
150
141
123
95.0
20
200 5.2 (19.6) 4.7 (17.8) 4.0 (15) 0.5 (2)
Figure 3-6: Boiler Connections
3
Specifications
(continued)
Table 3-5: Weights and Volume
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
)
ALTAC-136
112 (51)
95 (43)
41.4 (1050)
20.0 (508)
18.3 (465)
1.0 (3.8)
11.99 (1.11)
ALTAC-200
135 (62)
116 (53)
41.4 (1050)
20.0 (508)
22.3 (567)
1.3 (4.9)
17.98 (1.67)
Electrical Requirements
: 120 VAC, 60 Hz, 1-ph. 1.6A for boiler and internal 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 15 Start-up and Checkout for instructions to convert to LP gas.
Altitude
: Boiler is listed for 0 to 2,000 ft. (610 m). Do not install above 2,000 ft. (610 m).
Safety
Relief
Valve
Vent
Connector
Air Intake
Front View
120 VAC
Knockouts
Low Voltage
Knockouts
Domestic
Cold Water
Inlet
Boiler Return
Condensate Trap
Cleanout
Condensate Drain
Gas
Domestic
Hot Water
Outlet
Boiler
Supply
Bottom View
Combi Block Drain (hydronic side)
