02/22/2012 1
HI114
Introduction
The use of a buffer tank and controller is an important part of most water-to-water or air to water heat pump
applications, particularly if a combination of a forced air coil and hydronic zones are utilized. Choosing the
right buffer tank controller is important, as the correct controller can make a big difference in efficiency and in
the smooth operation of the entire heat pump system. Electro Industries’ Buffer Tank Controller utilizes many
features you won’t find on most controllers. Outdoor reset (the sensing and utilization of the outdoor
temperature to determine tank target temperature), easy set-up, dual fuel system interfacing and solid design are
just a few of the features you will appreciate in this controller.
Other Features:
Control forced air water coils plus up to eight hydronic zones with one controller
Digital or Standard Thermostat Compatible
Fuse Protected, Control Board and Zone Valve Connections
Onboard LED troubleshooting lights indicate stat calls and pump power for each individual zone
Remote Data Communication between the hydronic board and buffer tank controller
All pumps powered from the controller simplifies wiring
Model HP-BTC features 120VAC outputs.
Model HP-BTC-24 features 24VAC outputs
Compatibility:
Although most of the drawings in this manual represent Northern Heat Pump North Star Series heat pumps, this
buffer tank controller can be easily incorporated into any manufacturers’ water to water heat pump system.
Heating/Cooling
The Buffer Tank Controller will satisfy heat calls utilizing a forced air water coil (if present) and the hydronic
water loops. The controller will satisfy a chilled water call (cooling) using the forced air coil loop only. The
Buffer Tank Controller will not send chilled water through the hydronic loops.
Initial Inspection
Be certain to inspect all cartons and crates as units are received before signing the freight bill. Verify that all
items received have no physical damage. Report any damage or shortages on the freight bill. The purchaser is
responsible for filing the necessary claims with the carrier. Concealed or hidden damages not discovered until
removing packaging must be reported to the carrier within 15 days of receipt.
Unit Location and Mounting
Locate the unit on a dry indoor wall near the buffer tank. There are 4 mounting holes in the rear of the Buffer
Tank Controller cabinet. Using proper fasteners (not provided), utilize these mounting holes to secure the
cabinet to the wall of the structure.
Safety Considerations
WARNING
BEFORE PERFORMING SERVICE OR MAINTENANCE OPERATIONS ON A SYSTEM, TURN
OFF MAIN POWER SWITCHES TO THE INDOOR UNITS. IF APPLICABLE, TURN OFF THE
ACCESSORY HEATER POWER SWITCH. ELECTRICAL SHOCK COULD CAUSE PERSONAL
INJURY.
Installing and servicing heating and air conditioning equipment can be hazardous due to system pressure and
electrical components. Only trained and qualified service personnel should install, repair or service heating and
air conditioning equipment. When working on heating and air conditioning equipment, observe precautions in
the literature, tags and labels attached to the unit and other safety precautions that may apply, such as the
following safety measures:
Follow all safety codes.
Wear safety glasses and work gloves.
