Installation (cont’d.) – Chromalox PQ404-6 User Manual
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High Pressure
Control
Pressure
Gauge
Manual Reset
Pressure Conrol
Electric
Control
Box
Blow Down
Drain Valve
(L)
Return
Inlet (J)
Heating
Elements
Step Sequencer
(Optional)
Wall
30”
C
B
A
Wall
D
I
H
E
Blow Down
Drain Valve (L)
Check Valve
Water Inlet (K)
Water
Level
Control
G
60”
Safety
Valve (G)
Steam
Outlet (F)
INSTALLATION (cont’d.)
Figure 1
Figure 2
Figure 3
Model Number
A
B
C
D
E
F*
G
H
I
J
K
L
CHS-150 thru CHS-300
57”
45”
32”
40”
68”
3” NPT
1”
25”
31”
2” NPT
1” NPT
1” NPT
CHS-360 thru CHS-420
57”
45”
32”
40”
68”
4”
1”
25”
31”
2” NPT
1” NPT
1” NPT
CHS-495 thru CHS-630
57”
45”
32”
47”
86”
4”
1”
34”
40”
2” NPT
1” NPT
1” NPT
CHS-720 thru CHS-810
76”
58”
45”
47”
94”
6”
1-1/2”
38”
44”
2” NPT
1” NPT
1” NPT
CHS-945 thru CHS-1080
76”
68”
45”
47”
94”
6”
1-1/2”
38”
44”
2” NPT
1” NPT
1” NPT
CHS-1215 thru CHS-1620
86”
76”
56”
50”
98”
6”
1-1/2”
40”
46”
2” NPT
1-1/2” NPT
1” NPT
*CHS- thru 1620 have 2 control boxes (See Figure 2). Add 13” to “B” dimension.
*4” and 6” are flanged.
Safety
Valve
Globe
Valve
Insulated Steam Lines
(Pitch Down 5˚)
Water/Steam
Separator
Gate
Valve
Heat
Exchanger
Gate
Valve
Trap
Trap
(Typical Load)
Check Valve
Check Valve
Check
Valve
Vacuum
Breaker
Drain
Boiler
Auxiliary
Inlet
Cold Water
(for Initial Fill)
Pitch Down 5˚
Vent
Condensate
Return
Return
Cold Water
Make-Up
Strainer
Drain
Centrifugal
Turbine Pump
Typical Plumbing Installation of a Steam Boiler with Condensate Return System