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Locate the heater near a floor drain if pos- sible for easy maintenance and protection if trouble should occur. Allow ample space around the heater for servicing (see combustible clearance warning, page 1). Adequate air for combustion must be available. NOTE: Locate the heater so it is not subject to physical damage by moving vehicles or possible flooding. CONSUMER RESPONSIBILITIES MULTIPLE BURNER INSTALLATION SELECT THE RIGHT LOCATION FIGURE 1 Check for exhaust fans in the heater room or adja- cent areas which draw combustion air away from heater. THE HEATER MUST HAVE COMBUS- TION AIR TO OPERATE. WHEN THE WATER HEATER IS USED IN A COM- BINED APPLIANCE APPLICATION, PLEASE CONTACT THE LOCAL DISTRIBUTOR OR THE FAC- TORY FOR INSTALLATION INSTRUCTIONS ON “SYSTEM PLUS”. DO NOT INSTALL THE WATER HEATER ON COMBUS- TIBLE FLOORING (see Figure 2). Refer to NFPA 31 or contact Bock Water Heaters with questions concern- ing proper flooring materials. Minimum clearance to combustible construction is: SIDES 6"; BACK 6"; FRONT 24". The installation of this water heater must conform with local codes and ordinances. In the absence of local codes, the instal- lation must comply with the National Fire Protection Association (NFPA 31) Code. FAILURE TO FOLLOW THESE INSTRUCTIONS OR ALL APPLICABLE BUILDING CODES AND REGULATIONS VOIDS THE WARRANTY ON THIS WATER HEATER. – 3 – FIGURE 2 CONNECT WATER PIPING Hot water outlet (“HOT”) is on tank top. Cold water inlet is on right front bottom of 33E and 40E. On all other models, cold water inlet is on tank top. NOTE: INDEX MARK ON INLET BUSING MUST POINT TOWARD ARROW ON DECAL. HOLD INLET BUSHING OR NIPPLE WHEN TIGHTENING FITTINGS. ROTATING BUSHING COULD DRASTI- CALLY REDUCE PERFORMANCE. INLET BUSHING INDEX MARK – 3 – FIGURE 2 CONNECT WATER PIPING Hot water outlet (“HOT”) is on tank top. Cold water inlet is on right front bottom of 33E and 40E. On all other models, cold water inlet is on tank top. NOTE: INDEX MARK ON INLET BUSING MUST POINT TOWARD ARROW ON DECAL. HOLD INLET BUSHING OR NIPPLE WHEN TIGHTENING FITTINGS. ROTATING BUSHING COULD DRASTI- CALLY REDUCE PERFORMANCE. INLET BUSHING INDEX MARK Connect the water piping, being careful not to apply heat to the heater nipples. Install dielectric unions and shut off valves on both hot and cold water lines. The 40E and all “C” models (example: 32EC, 51PPC) have a 1” NPT tapping located on the front left side of the tank. This is an alternate outlet for use with combined appliance applications. If this fitting is not used, plug it with a fitting suitable for potable water. A 1” NPT fitting is also located behind the drain valve on the 40E and all “C” models. This is for use as an alternate inlet or a combined appliance return. Your heater is shipped with a reducer in this location to mount the drain valve. The 33E and 40E models are equipped with a brass inlet bushing installed in the tank. Heaters equipped with this bushing are marked next to the inlet by the decal shown on the le...

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