Note:
The HotSpot ACWH unit does not ship with factory installed boiler drain valves.
We recommend the installation of boiler drain valves and a isolation valve at the
ACWH unit end of the water lines. Drainable valves, also known as “Stop and
Waste” valves should be used, as they will allow draining of the heat exchanger if
needed and will also perform as air-bleeds when filling the system.
IMPORTANT:
*Make sure that the water lines are connected to the “cold water in” And “hot
water out” connections of the ACWH unit. Connecting the water lines to the
wrong ACWH connection will lower the efficiency of the heat recovery circuit.
*Make sure that the water line from the water heater’s cold water supply tee is
connected to the “cold water in” stub on the ACWH unit. Performance is
significantly impaired if the water line connections are reversed.
*When using the Tank Tap, note that the side-inlet of the Tank Tap connects to the
ACWH “cold in” stub and the Tank Tap end connection connects to the ACWH “hot
out’ stub. See Tank Tap instructions if using a Tank Tap.
•
***IMPORTANT*** If connecting the water lines to the
ACWH with copper
pipe
, DO NOT BRAZE this connection, use soft solder only. Inside the unit, soft
solder is used to connect to the pump – if you heat the water line by brazing, the
solder will melt and run out, causing a leak.
Insulate the entire length of both water lines between the water heater and the
ACWH unit, using closed cell foam pipe insulation.
