Product Overview

Dimensions
AA
B B
D
C
F F
E
H
G
AA
B B
D
C
F F
E
G
H
TO SECONDARY
RETURN HEADER
SYSTEM
RETURN
5
6
1
2
4
6 3
8
7
9
SYSTEM
SUPPLY
10
FROM SECONDARY
SUPPLY HEADER
30
70
100
140 70
100
140
20
35
60 20
35
60
80
30
180
0
0
80
180
A
1 1/4”
B
1 1/2”
C
5”
D
14 1/4”
E
9 3/4”
F
2 7/8”
G
10”
H
3 3/16”
Weight(lb)
22
Component Characteristics
1 Three-way mixing valve with built-in temperature sensor
2 Variable-speed pump Alpha 25-55U or three-speed UPS 15-58 pump
3 Adjustable differential pressure by-pass valve (optional - shown in view)*
4 Supply temperature gauge
5 Return pressure gauge
6 Secondary circuit shut-off ball valves
7 Connecting pipes
8 Wrench to adjust secondary circuit shut-off ball valves
9 Insulation
10 Check valve
*Factory set-up includes a blind spacer (no flow path)
Hydraulic diagram
1
Secondary circuit shut-o ball
valve
Adjustable dierential pressure
by-pass valve
3-way thermostatic
mixing valve
Circulator pump
Check valve
2
3
45
66
SYSTEM RETURN
T
T
SYSTEM SUPPLY
TO SECONDARY
RETURN HEADER
FROM SECONDARY
SUPPLY HEADER
Temperature gauge
7
11
Code
166600A
166610A
166602A
166612A
Description
Thermostatic fixed temperature mixing unit with Grundfos 15-58 pump on right
Thermostatic fixed temperature mixing unit with Grundfos 15-58 pump on left
Thermostatic fixed temperature mixing unit with Grundfos Alpha 25-55U pump on right
Thermostatic fixed temperature mixing unit with Grundfos Alpha 25-55U pump on left