Thermal Solutions APEX APX425C User Manual

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106308-05 - 3/23
APEX Installation, Operating, & Service Instructions APEX Installation, Operating, & Service Instructions
Boiler
Model
Supply
Connection
(in.)
Return
Connection
(in.)
DT= 35°F ΔT = 30°F ΔT = 25°F ΔT = 20°F
Minimum
Required
Flow (GPM)
Boiler
Head
Loss
(ft.)
Required
Flow
(GPM)
Boiler
Head
Loss (ft.)
Required
Flow
(GPM)
Boiler
Head Loss
(ft.)
Maximum
Required
Flow (GPM)
Boiler
Head
Loss (ft.)
APX425C 1-1/2 1-1/2 21.5 6.1 25.1 7. 9 30.2 10.8 37.7 15.9
APX525C 2 2 27.7 5.2 32.3 6.8 38.8 9.3 48.5 13.6
APX625C 2 2 33.9 4.7 39.6 6.1 47.5 8.4 59.4 12.4
APX725C 2 2 39.4 6.0 45.9 7. 9 55.1 10.9 68.9 16.1
APX825C 2 2 43.4 5.9 50.7 7. 8 60.8 10.8 76.0 16.1
Notes: Required Flow = Output*1000/(500*ΔT), where flow rate is in GPM, output is in MBH, and ΔT is in °F
Outputs for specific boiler models are provided in Table 1-6. See also Tables 6-4 and 6-5 for near boiler piping sizing. Using boiler
antifreeze will result in increased fluid density and may require larger circulators.
Table 6-3: Flow Range Requirement Through Boiler
Boiler
Model
Supply
& Return
Connection
(in.)
Near
Boiler
Pipe
Size
(in.)
DT=35°F DT=30°F DT=25°F DT=20°F
Flow
(GPM)
Boiler &
Piping
Head
Loss
(ft.)
Circulator
Model
Flow
(GPM)
Boiler &
Piping
Head
Loss
(ft.)
Circulator
Model
Flow
(GPM)
Boiler &
Piping
Head
Loss
(ft.)
Circulator
Model
Flow
(GPM)
Boiler
&
Piping
Head
Loss
(ft.)
Circulator
Model
APX425C 1½ 2 21.5 6.4 UP26-64F 25.1 8.4 UP26-99F 30.2 11.5
UPS43-
100F,
Spd. 2
37.7 16.9
UPS43-
100F,
Spd. 3
APX525C 2 2 27.7 5.8
UPS43-
44FC,
Spd. 2
32.3 7.5 UPS43-44F 38.8 10.3
UPS43-
100F,
Spd. 2
48.5 15.2
UP50-60F,
Spd. 3
APX625C 2 2 33.9 5.5
UPS43-
44FC,
Spd. 3
39.6 7.2
UPS43-
100F, Spd. 2
47.5 9.9
UPS50-60F,
Spd. 2
59.4 14.7
UPS40-
80/2,
Spd. 3
APX725C 2 2 39.4 7.1
UPS43-
100F,
Spd. 2
45.9 9.4
UPS43-
100F, Spd. 3
55.1 12.9
UPS50-60F,
Spd. 3
68.9 19.1
UP50-80/2,
Spd 3
APX825C 2 2½ 43.4 6.4
UPS43-
100F,
Spd. 2
50.7 8.5
UPS43-
100F, Spd. 3
60.8 11.8
UP50-60F,
Spd 3
76.0 17.6
UPS50-
80/2,
Spd. 3
Table 6-5: Recommended Grundfos Circulators for 50 Equivalent ft. Near Boiler Piping [Approximately 20 ft.
Straight Pipe, (4) 90° Elbows, and (2) Full Port Ball Valves]
Table 6-4: Recommended Taco Circulators for 50 ft. Equivalent ft. Near Boiler Piping [Approximately 20 ft.
Straight Pipe, (4) 90° Elbows, and (2) Full Port Ball Valves]
Boiler
Model
Supply
& Return
Connection
(in.)
Near
Boiler
Pipe
Size
(in.)
DT=35°F DT=30°F DT=25°F DT=20°F
Flow
(GPM)
Boiler &
Piping
Head
Loss
(ft.)
Circulator
Model
Flow
(GPM)
Boiler &
Piping
Head
Loss
(ft.)
Circulator
Model
Flow
(GPM)
Boiler &
Piping
Head
Loss
(ft.)
Circulator
Model
Flow
(GPM)
Boiler
&
Piping
Head
Loss
(ft.)
Circulator
Model
APX425C 1½ 2 21.4 6.4 0014 25.0 8.3 0013 30.0 11.4 2400-60 37.5 16.8 2400-70
APX525C 2 2 27.7 5.8 0012 32.3 7.5 2400-60 38.8 10.3 2400-60 48.5 15.2 2400-65
APX625C 2 2 33.9 5.5 2400-60 39.6 7.2 2400-60 47.5 9.9 2400-65 59.4 14.7 2400-70
APX725C 2 2 39.4 7.1 2400-60 45.9 9.4 2400-65 55.1 12.9 2400-65 68.9 19.1 1935
APX825C 2 2½ 43.4 6.4 2400-60 50.7 8.5 2400-65 60.8 11.8 2400-65 76.0 17.6 1935
6 Water Piping and Trim (continued)

Thermal Solutions APEX APX425C Specifications

General

Brand	Thermal Solutions
Model	APEX APX425C
Category	Boiler
Language	English