Weil-McLain EGH-125, EGH-105 III Install boiler controls steam boilers, Steam boiler connections

Page 7

CSD-1 control system — Natural gas

III Install boiler controls — steam boilers

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.

 

IV Optional heaters — steam boilers only

 

 

 

Install optional tankless heater, if used, (steam boiler only) per EGH Manual Section IV.

Figure 4

 

 

 

 

Table 3

 

 

Steam boiler connections

 

 

Steam boiler connections

 

11¾"

275/8"

 

Tapping

Application

W-M Part No.

 

 

 

 

 

 

163/16"

 

 

T

McDonnell & Miller PS852M-24 M/R

511-114-530

 

 

 

 

 

 

 

 

 

 

probe LWCO

 

 

 

 

 

 

 

 

E

G

Supply

 

C

Not used — plug tapping

—

 

risers

 

D

Drain connection (per EGH manual)

—

 

 

 

 

 

 

 

 

L

 

E

ASME relief valve (per EGH manual)

—

 

 

 

S

 

G

Not used - plug tapping

—

32¾"

C

 

 

 

H

Float LWCO, automatic reset —

—

2313/16 "

T

 

H

V

Gravity return — McD-M 67W-1

511-114-494

(Water line)

 

 

 

 

Pumped return — McD-M 42-A

511-114-531

 

 

 

 

 

 

 

 

 

D

 

 

Pressure gauge

510-218-045

 

 

 

165/8"

L

Pressure limit, automatic reset

510-312-135

13½"

 

 

 

Return

 

 

Honeywell L404C-1147 M/R limit

510-312-060

 

 

 

 

 

 

 

 

 

 

S

Skim tapping (per EGH manual)

510-312-209

211/16"

 

 

 

 

V

Gas supply connection (right or left)

—

 

24"

 

 

 

Plug all tappings not used.

 

 

 

 

677-07

 

 

Part Number 550-110-677/0299

 

 

 

 

 

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Contents Control Supplement Please read this page first Boiler cartons Carton guideGas train assembly InstallationVent damper assemblies Install optional vent damper if suppliedII Piping connections III Install boiler controls water boilersWater boiler connections IV Optional heaters steam boilers only III Install boiler controls steam boilersSteam boiler connections Gas piping VI WiringCall for heat VI Wiring sequence of operationWater boiler wiring Wiring water boilersSchematic Wiring Diagram Control assembly water boiler VI Wiring water boilersCSD-1 control panel Gravity return VI Wiring steamSchematic Wiring Diagram 13a Control assembly steam, gravity returnCSD-1 control panel Pumped return Schematic Wiring Diagram Control assembly steam, pumped return Terminal strip Before proceeding To place boiler in operation VII Final adjustmentsOperating instructions VII Final adjustments operating instructionsViii Check-out procedure operation Leak test procedure Viii Check-out procedure leak testVerify proper operation after servicing Viii Check-out procedure troubleshootingReplace pilot assembly TS-2 No Spark System boiler with vent damper does not work Not OK TS-3 Pilot lights Main valve will not come on from previous IX Service and maintenance Water boiler assembly Replacement parts water boilersRV20VL Water boiler replacement partsSteam boiler assembly Replacement parts steam boilersRV20VL Steam boiler replacement partsWeil-McLain Blaine Street Michigan City,
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