Optional heaters, Install boiler controls, Csd-1 control system — natural gas – Weil-McLain EGH-125 User Manual
Page 7: Steam boilers, Steam boilers only
CSD-1 control system — Natural gas
Part Number 550-110-677/0299
7
Install boiler controls —
steam boilers
III
Figure 4
Steam boiler connections
Table 3
Steam boiler connections
32¾"
23 / "
13
16
(Water line)
13½"
11¾"
27 / "
5
8
16 / "
3
16
2 / "
11
16
16 / "
5
8
24"
C
T
E
G
D
Return
Supply
risers
H
S
V
L
677-07
Tapping
Application
W-M Part No.
T
McDonnell & Miller PS852M-24 M/R
probe LWCO
511-114-530
C
Not used — plug tapping
—
D
Drain connection (per EGH manual)
—
E
ASME relief valve (per EGH manual)
—
G
Not used - plug tapping
—
H
Float LWCO, automatic reset —
—
Gravity return — McD-M 67W-1
511-114-494
Pumped return — McD-M 42-A
511-114-531
L
Pressure gauge
510-218-045
Pressure limit, automatic reset
510-312-135
Honeywell L404C-1147 M/R limit
510-312-060
S
Skim tapping (per EGH manual)
510-312-209
V
Gas supply connection (right or left)
—
Plug all tappings not used.
All water level controls must mount on the left end of the boiler. Failure to do
so could result in nuisance shutdowns and possible lockout on the manual
reset control due to water level variations from end to end. Substantial
property damage could result from freezing due to loss of heat.
All controls must mount on left end of the boiler. The correct tappings are
available only on the left end section.
Install steam trim components as required by CSD-1, latest edition. See Figure 4 and Table 3.
See also Figure 8 or Figure 10 for finished assembly.
•
CSD-1 requires two low water cutoffs (one manual reset) and two limit controls (one
manual reset) as shown in the illustration.
•
For float type (automatic reset only) low water cutoffs other than those shown in this
Supplement, refer to
EGH Manual
for mounting and piping instructions.
Install a blowdown valve on any float type low water cutoff as described in
the
EGH Manual
, Section III.
Plug all unused tappings.
All piping and control connections must also comply with the
EGH Manual
.
Optional heaters —
steam boilers only
IV
Install optional tankless heater, if used, (steam boiler only) per
EGH Manual
Section IV.