Weil-McLain EGH-125 - Manual (Page 3)

CSD-1 control system — Natural gas
Part Number 550-110-677/0299 3
Carton guide
Table 1 Boiler cartons
Verify that the correct cartons are available before beginning assembly. Note that the Base assembly and Trim &
controls cartons for CSD-1 are special. The CSD-1 ignition control panel (in Base assembly carton) consists of ignition
control module, impulse relay and lighted push-button switch mounted and wired on a panel base.
Carton Comments EGH-105 EGH-115 EGH-125
Section assembly (a)
With tankless opening 321-711-120 321-711-130 321-711-140
Without tankless opening 321-711-125 321-711-135 321-711-145
Base assembly (b) CSD-1 381-700-400 381-700-402 381-700-404
Base panels 381-700-250 381-700-255 381-700-260
Jacket 411-800-280 411-800-290 411-800-300
Collector hood 450-014-752 450-014-753 450-014-754
Draft hood 450-206-242 450-206-243 450-206-244
Float low water cutoff (steam)
Gravity return (M&M #67W-1) 381-700-341 381-700-341 381-700-341
Pumped return (M&M #42-A) 511-114-531 511-114-531 511-114-531
Vent damper (optional) (c) 381-800-446 381-800-447 381-800-447
Tankless heater (optional) Steam boilers only 386-700-350 386-700-350 386-700-350
Trim & controls (see below)
Water, CSD-1 — or — 381-700-406 381-700-406 381-700-406
Steam, CSD-1, gravity return — or — 381-700-408 381-700-408 381-700-408
Steam, CSD-1, pumped return 381-700-410 381-700-410 381-700-410
Note a — CSD-1 water boilers cannot be equipped with a tankless heater.
Note b — Base assembly includes burner tubes, gas train components, pilot assembly and control panel (with ignition control).
Note c — EGH vent dampers meet ASME CSD-1 requirements (paragraph CF-210(c)) because they comply with ANSI Z21.13.
Steam trim and control carton
Gravity return Steam trim and control carton
Pumped return Water trim carton
Pressure limit control, automatic reset Pressure limit control, automatic reset Aquastat, automatic reset
Pressure limit control, manual reset Pressure limit control, manual reset Aquastat, manual reset
Probe low water cutoff, manual reset Probe low water cutoff, manual reset Probe low water cutoff, manual reset
Transformer/relay Transformer/relay Transformer/relay
Wire harness, steam gravity return Wire harness, steam pumped return Wire harness, water
Crimp spade wire terminations Crimp spade wire terminations Crimp spade wire terminations
ASME Relief valve ASME Relief valve ASME Relief valve
Pressure gauge Pressure gauge
Pressure/temperature gauge
Gauge glass and valves Gauge glass and valves
Brass cross, brass nipple, bushings (3) and
siphons (3) for mounting pressure controls
and gauge Brass cross, brass nipple, bushings (3)
and siphons (3) for mounting pressure
controls and gauge