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CSD-1 control system — Natural gas
Part Number 550-110-677/0299
35
Table 6 Steam boiler replacement parts
Before replacing any parts on the boiler — Turn off power to boiler and shut off gas supply. Failure to comply could
result in severe personal injury, death or substantial property damage.
Item Part description Boiler models Vendor Vendor part number
Weil-McLain
part number
1 Main burner EGH-105 – 125 Weil-McLain — See EGH Manual —
2 Main burner with pilot bracket EGH-105 – 125 Weil-McLain — See EGH Manual —
3 Pilot burner bracket (not shown) EGH-105 – 125 Weil-McLain — See EGH Manual —
4 Pilot burner (not shown) EGH-105 – 125
Beckett Gas E48A-1
511-330-166
Johnson Controls Q90GE-1
5 Main gas valve EGH-105 – 125 Robertshaw 7000DERHC-S7C 511-044-287
6 Manual gas valve, 1" NPT EGH-105 – 125 Watts FBV3-06 511-246-290
7 Leak test valve EGH-105 – 125 Key Gas 511-246-339
8 Pilot gas valve EGH-105 – 125
Honeywell V8046C-1014
511-044-039
Johnson Controls H91ABG
8a Pilot gas pressure regulator EGH-105 – 125 Maxitrol RV20VL 510-933-195
9 Pilot shutoff valve EGH-105 – 125 Conbraco 53-300-01 511-246-345
10 Pilot tubing, alum. 1/8" O.D. x 34" long EGH-105 – 125 Available at local supply house
11 Ignition control EGH-105 – 125 United Technologies 1003-615 511-330-086
12 Impulse relay EGH-105 – 125 Potter-Brumfield S89R-11ABD1-24 510-350-226
13 Push-button switch EGH-105 – 125
Honeywell AML21CBA2AA
511-624-580
Eaton Controls 221K11810
14 Lens cover EGH-105 – 125
Honeywell AML51-C10R
511-624-581
Eaton Controls 220PM02A
15 Light bulb EGH-105 – 125 TI-¾ (available at local supply house)
16
Wiring harness, pumped return steam EGH-105 – 125 Weil-McLain 591-391-888
Wiring harness, gravity return steam EGH-105 – 125 Weil-McLain 591-391-887
17
Vent damper assembly — optional
(not for use in Canada)
EGH-105
Effikal RVGP-KS-10BF
381-800-446
Johnson Controls Q35GP-2 (note 1)
EGH-115 – 125
Effikal RVGP-KS-12BF
381-800-447
Johnson Controls Q35GR-2 (note 1)
18 Vent damper actuator EGH-105 – 125
Effikal only RVGP 510-512-337
Johnson only M35BE-1C 510-312-255
19 Vent damper harness EGH-105 – 125 Weil-McLain 10C321 591-391-795
20 Limit control, automatic reset EGH-105 – 125
Honeywell PA-404-A 510-312-135
White-Rodgers P47EA-3 510-311-023
21 Limit control, manual reset EGH-105 – 125 Honeywell L404C-1147 510-312-060
22 Probe LWCO, manual reset EGH-105 – 125 McDonnell & Miller PS852M-24 511-114-530
23a Float LWCO, automatic reset EGH-105 – 125 McDonnell & Miller 67W-1 511-114-494
23b Float LWCO/pump control, auto reset EGH-105 – 125 McDonnell & Miller 42-A 511-114-531
24 Pressure gauge EGH-105 – 125
Ametek P505K
510-218-045
Winter E1437
25 Transformer/relay EGH-105 – 125 Honeywell R8285D-5001 510-312-169
Note 1 — Johnson damper assembly consists of M35BC actuator and Y15 vent pipe.
Replacement parts must be purchased through a local Weil-McLain distributor. When ordering, specify boiler model and series and
include description and number of replacement part. Results from using modified or other manufactured parts will not be covered
by warranty and may damage boiler or impair operation.
Refer to boiler manual for parts not listed above.