Product Overview

Dimensions
AA
B B
D
C
F F
E
H
G
TO SECONDARY
SUPPLY HEADER
TO SECONDARY
RETURN HEADER
SYSTEM SUPPLY
SYSTEM RETURN
4
5
1
3
5
2
7
6
8
9
10
30
70
100
140 70
100
140
0
20
35
60 20
35
60
80
80
30
180
0
180
A
1
1/4”
B
11/2”
C
5”
D
14
1/4”
E
9 3/4”
F
2
7/8”
G
10”
H
3
3/16”
Weight(lb)
21
Component Characteristics
1 Variable-speed pump Alpha 25-55U or three-speed pump UPS
15-58
2 Adjustable differential pressure by-pass valve
(optional-shown in this view)*
3 Supply temperature gauge
4 Return temperature gauge
5 Secondary circuit shuf-off ball valves
6 Connecting pipes
7 Wrench to adjust secondary circuit shut-off ball valves
8 Insulation
9 Spacer (no flow path)
10 Check valve
*Factory set-up includes a blind spacer (no flow path)
Hydraulic diagram
Secondary circuit shut-o
ball valve
Temperature gauge
Adjustable dierential pressure
by-pass valve
Circulator pump
Check valve
1
2
34
55
6
SYSTEM RETURN SYSTEM SUPPLY
TO SECONDARY
RETURN HEADER
FROM SECONDARY
SUPPLY HEADER
10
Code
165600A
165610A
165602A
165612A
Description
Dual line with 15-58 pump on right
Dual line with 15-58 pump on left
Dual line with Alpha pump on right
Dual line with Alpha pump on left
AA
B B
D
C
F F
E
H
G