Specifications

17
LP- 276 REV. 9.4.14
The boiler is designed to be connected to a storage tank to supply domestic hot water. HTP offers storage tanks that are 80/119/175
gallon size storage tanks constructed in either stainless steel or glass-lined construction. These storage tanks connect directly to the
boiler supply and return connections. Connect the cold water supply to both the storage bottom port and the supply side of the Mod Con
VWH (shown in Piping details, this section). It is important that you install a flow check on the supply line of Mod Con VWH before you
connect the feed line to the storage tank. This will allow the cold feed to flow through the storage tank first. It is recommended that you
install shut off valves on the cold feed line for ease of future service. If there is a back flow preventer or any type of no return valve in
the system, you must install an additional tee for a suitable potable hot water expansion tank. Connect the Storage tank return line to
the return connection located on the Mod Con VWH (shown in Section H, Piping Diagrams). Then connect your hot water outlet located
on the storage tank to your hot water plumbing lines.
Never use dielectric unions or galvanized steel fittings when connecting to a stainless steel storage tank or boiler.
When raising tank temperature, you increase the risk of scalding. Use a water tempering or mixing valve and extreme caution. Consult
codes for conformance.
E. INSTALLATION OF THE FLOW SWITCH
NOTE: If you are converting the boiler to a VWH, you will follow steps 1 – 9. If you have purchased a factory VWH, you will only need to
follow steps 1 – 3 and 8.
1. Attach flow paddle as shown.
2. Thread brass tee onto outlet nipple using pipe dope.
3. Thread flow switch into tee using pipe dope, making certain the FLOW arrow points in the correct direction.
4. Disconnect red wire on the low water cut off probe and connect it to the red wire from the wire harness (included in kit).