The relief valve is set to open at 30 psi. If the valve is replaced, the replacement must have a relief capacity in excess of the DOE heating capacity for the boiler. Pipe the discharge of the relief valve to a location where water or steam will not create a hazard or cause property damage if the valve opens. The end of the discharge pipe must terminate in an unthreaded pipe. If the relief valve discharge is not piped to a drain, it must terminate at least 6 inches above the floor. Do not run re

Be careful to cut the pipe square. De burr the cut end with a file or emery cloth. d) Make an insertion mark 1” from the male end of the outer pipe. e) Cut the plastic inner pipe so that it will protrude 3/8” beyond the male end of the outer pipe when reinstalledin the outer pipe. Use a fine tooth hacksaw or a PVC saw to cut the plastic pipe and be careful to cut the pipe square. De burr the cut edge of the plastic pipe with a file, razor blade, or fine sandpaper. f) Reinstall the inner pipe. FI

Stainless vent manufacturer’s wall thimble part numbers are shown in Table 7.5. Note that concentric vent has a “zero” clearance to combustibles and therefore does not require the use of wall thimbles. TABLE 7.5: PERMISSIBLE STAINLESS STEEL VENT SYSTEMS AND PRINCIPLE VENT COMPONENTS (VENT OPTIONS 2, 5) MANUFACTURER VENT SYSTEM SIZE COMPONENT PART NUMBER HEAT FAB SAF-T VENT EZ SEAL 3 BOILER COLLAR CROWN 230510 3 WALL THIMBLE HEAT FAB 7393, 7393GCS, 5391CI 3 HORIZONTAL TERMINAL CROWN 230511 3 VERT

These options include: 1) 80/125mm concentric venting may be used to achieve longer vent runs. 2) 80/125mm concentric venting may be used for vertical vent applications. 3) An 80/125mm concentric snorkel kit is now offered. 4) Metal-Fab “Corr/Guard” may now be used for stainless steel vent applications. Refer to the installation manual supplied with the boiler for important warnings and other information not covered in this supplement. VII Venting WARNING FAILURE TO VENT THIS BOILER IN ACCORDANC

WATER DESCRIPTION CROWN PART # QUANTITY HYDROLEVEL 550 LWCO 450560 1 L4006E1109 35-3100 1 3/4 LONG WELL 35-1020 1 B. STEAM GRAVITY RETURN DESCRIPTION CROWN PART # QUANTITY #64 LWCO 40-640 1 STEAM FITTING PACKAGE 332001 1 C. STEAM PUMPED RETURN DESCRIPTION CROWN PART # QUANTITY #150S-MD LWCO 40-160 1 STEAM FITTING PACKAGE 332001 1 D. STEAM FITTING PACKAGE DESCRIPTION CROWN PART # QUANTITY 3/4 BLACK EXTENSION 95-090 1 3/4 X 1/4 BRASS BUSHING 950016 1 90 DEG. BRASS PIGTAIL 95

The temperature must be set below the lowest permissible temperature for any system related component affected by boiler supply water. Under no circumstances can the high limit aquastat be set higher than 250°F. I. BOILER MODULATING CONTROL - Various controls are used to modulate burner firing rates. No attempt will be made to cover every possibility, however a general outline will be given. Most modulation controls require the entry of a boiler temperature identifying boiler operation at the

Do not rely on the pressure gauge to indicate that the boiler is at zero pressure. Open the safety valve to relieve all internal pressure prior to proceeding. Safety valve discharge piping must be piped such that the potential for burns is eliminated. e. Unscrew the probe from the boiler tapping. f. Inspect that portion of the probe that is exposed to the boiler water for a scale or sediment buildup. g. Light deposits may be removed by wiping the probe with a damp cloth. Wiping the probe with

Circuit breaks on temperature rise. 10) Expansion tanks, air scoops and other components left out for clarity. 11) Observe all applicable plumbing and electrical codes. This diagram is for reference only. The installer or designer is responsible for the proper selection and design of the system. A4. 3-way RTC in Primary/Secondary - Heating and DHW using Indirect Water Heater on Primary Loop; without Outdoor Reset (ELECTRICAL) A1 = Aquastat, Indirect DHW Tank C1 = Mixing Valve Actuating Mo

For assistance or additional information, consult a qualified installer, service agency or the gas supplier. This boiler requires a special venting system. Read these instructions carefully before installing. CR®WN Boiler Co. Manufacturer ofHydronic He ating Products P.O. Box 14818 3633 I. Street Philadelphia, PA 19134 Tel: (215) 535-8900 • Fax: (215) 535-9736 • IMPORTANT INFORMATION - READ CAREFULLY All boilers must be installed in accordance with National, State and Local Plumbing, Heati

The 14 gauge mounting bracket must be attached to the jacket first using four (4) #8 x %” drill point sheet metal screws. One may find it easier to install some of the conduit connectors with their corresponding conduit runs onto the RTC back panel before mounting to the bracket. The actual controller can and should be removed from the back panel during the mounting process. This will eliminate the potential for accidental damage to the controller. The RTC back panel is mounted onto the brack