Gas fired commercial copper boilers user's manual printed in the u.S.A. 0212 321082-000 thank you for buying this energy efficient boiler. We appreciate your confidence in our products. Models: hw 300, 399, 420, 520, 670 for hydronic heating and hot water supply up - flow models operation - maintena...
2 table of contents table of contents .......................................................................... 2 safe installation, use and service.......................................... 3 general safety................................................................................ 4 introduct...
3 the proper installation, use and servicing of this boiler is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your boiler to warn you and others of a potential injury hazard. Read and obey all safety...
4 general safety.
5 this design complies with the current edition of the ansi z21.13 low-pressure boiler standard. Compliance under this standard implies that when the boiler underwent test, the gas manifold and control assembly pro vided on the boiler met safe lighting and other performance criteria. Detailed instal...
6 figure 1. Component locations control components.
7 thermal balancer figure 4 shows the internal wiring of the thermal balancer. The device may be tested after disconnecting the four leads from their respective terminals on the unit. 1. Apply a test light to the yellow and red leads. • the lamp should light as the contact in this circuit is normall...
8 pressure relief valve an asme rated pressure relief valve is furnished with the boiler. A fitting for the pressure relief valve is provided in the top of the boiler. Never operate the heating elements without being certain the boiler is filled with water and a properly sized pressure relief valve ...
9 use anti-scald valve(s) in the hot water system to reduce the risks of scalds at points of use such as lavatories, sinks and bathing facilities. A change in water temperature in the storage tank lower than the tank temperature control setting will cause the sensor to close its contacts and consequ...
10 boiler start up and operations after placing the boiler into operation, the ignition system safety shutoff device must be tested by the following test method . 1. Reset high limit temperature control to lowest setting. (see figure 2 on page 7). 2. Reset system controller to maximum setting, causi...
11 figure 7. Spark ignition pilot burner and burner flame figure 8. Adjusting pilot flame 2. Pilot burner - electronic ignition to establish pilot flame without main burner operation, it will be necessary to perform the following steps: servicing of the pilot burner (every six months) includes keepi...
12 5. Repeat steps 1 thru 6 of the operating instructions. 6. Remove the pressure gauge or manometer from the manifold pressure tapping. Replace the screw-in plug in the manifold pressure tap. 7. Repeat steps 7 thru 11 of the operating instructions on page 15. The boiler will resume normal operation...
13 start stage 1 trial for ignition stage 2 main burner operation end thermostat (controller) calls for heat spark generator powered first valve (pilot) operator opens pilot burner operation pilot burner lights. Pilot burner does not light module senses module response flame current. S-8600m after 1...
14 lighting and operating instructions (natural and propane for hw300 - hw399.
15 lighting and operating instructions (natural and propane with i.I.D. For hw420 & up).
16 table 3. Cer-temp 80 recovery system checkout procedure before any extensive troubleshooting, perform the following: ensure that: • voltage (120 vac) is supplied to the boiler. • system control (tank temperature control, thermostat, etc.) is calling for boiler operation (call for heat). • other c...
17 checking honeywell s-8600h or s-8600m intermittent ignition controls turn off gas supply. Is voltage (24 vac) across the 24 v terminals on module during “call for heat”? Turn off power supply. Is ignition cable firmly plugged into pilot assembly and module? Is ground wire firmly attached to pilot...
18 checking honeywell s-8600h or s-8600m intermittent ignition controls spark at pilot burner but pilot will not light ensure all manual shutoff valves are fully open; all filters are clean; all gas connections are gas tight; pilot tubing is not damaged, obstructed or kinked; and pilot orifice is un...
19 checking honeywell s-8600h or s-8600m intermittent ignition controls pilot burner lights but main burner does not light does the pilot flame cover 3/8” to 1/2” of igniter/sensor rod? Does spark stay on for more than 15 seconds after the pilot is “proven” (lit)? Ensure the ground wire and ignition...
20 checking honeywell s8600h or s-8600m intermittent ignition controls no spark at pilot burner but pilot will not light turn off gas supply. Is there a good connection between terminals? Is module securely attached to boiler for good ground connection? Is voltage (24vac) across transformer positive...
21 yellow led flash code a indicates recommended service action heartbeat normal flame signal not applicable 2 weak flame signal- system will operate reliably but flame signal is less than desired. Note: this indication may flash temporarily during or shortly after lightoff on some applications. Per...
22 green led flash code (x+y) a indicates next system action recommended service action off no "call for heat" not applicable none flash fast startup - flame sense calibration not applicable none heartbeat normal operation not applicable none 2 5 minute retry delay • pilot flame not detected during ...
23 green led flash code (x+y) a indicates next system action recommended service action off no "call for heat" not applicable none flash fast startup - flame sense calibration not applicable none heartbeat normal operation not applicable none 3 recycle • flame failed during run initiate new trial fo...
24 maintenance procedures these boilers are designed to give many years of efficient and satisfactory service when properly operated and maintained. To assure continued good performance, the following recommendations are made. The area around the boiler should be kept clean and free from lint and de...
25 venting maintenance it is recommended that the heating surfaces and vent piping of the boiler be checked every six months for dust, deterioration and carbon deposits. Remove all soot or other obstructions from chimney and flue which will retard free draft. Replace any damaged or deteriorated part...
26 notes.
27 limited warranty a. O. Smith corporation, the warrantor, extends the following limited warranty to the owner of this boiler: 1. If within ten years after initial installation of the boiler, a heat exchanger or gas burner should prove upon examination by the warrantor to be defective in material o...
28 25589 highway 1, mcbee, sc 29101 technical support: 800-527-1953 • parts: 800-433-2545 • fax: 800-644-9306 www.Hotwater.Com.
