THE ENERGY CONSERVATION UNIT (E.C.U.)
Heat Recovery Unit
Installation instructions
Models HR06
Special equipment suggested:
In addition to the normal tools used by air conditioning technicians, the following should
be available. A precision thermometer - thermocouple type, a vacuum pump, and a refrigerant recovery unit.
Caution:
Check each installation in advance. Make sure the air conditioning system is operating within the manufacturer’s
specifications. Do not proceed until equipment is operating correctly.
Note: The “Uniflow Connector” is actually an Installation Fitting such as
the IK-5.
Refrigerant Lines Maximum
Length (FT) One Way
Compressor to ECU
Nominal
Cooling
Capacity
Btu/Hr
3/8
O.D.
1/2
O.D.
5/8
O.D.
3/4
O.D.
7/8
O.D.
18,000
6
20
40
-
-
24,000
-
10
30
-
-
30,000
-
7
25
-
-
36,000
-
5
15
50
-
42,000
-
-
12
40
-
48,000
-
-
10
30
-
54,000
-
-
-
25
40
60,000
-
-
-
20
30
Note:
If high pressure switch and/or
external mufflers are present in the
discharge line, they should remain in line
between compressor and ECU.
1. Turn off power to water heater (if gas, turn off gas valve), and air conditioning equipment.
2. Turn off water supply to water heater.
3. Drain tank if necessary with hot water faucet open.
4. Locate ECU as close to condensing unit as possible.
5. Mount unit. Unit should be vertically
wall mounted
with tubes down and be
above the height of the compressor
.
Never with tubes upward or horizontally pad mounted.
6. Recover refrigerant charge. Cut hot gas line as close as practical to compressor (before the four way valve on heat
pumps). Cut openings in condensing unit for hot gas lines. Attach "Gas In" line to compressor discharge line. Attach
"Gas Out" line to other side of cut leading to condenser coil. This unit is designed for heat pump or straight cool
application.
Note:
Hot gas lines and water lines must be insulated with armaflex, rubatex, or similar material. Do not combine
any lines within the same insulation sleeve or in a chase that may become filled with water.
7. When refrigerant connections are complete, pressurize system and leak check. Replace or install standard filter
dryer in liquid line (optional but recommended). Openings in condensing unit must be large enough to pull armaflex
through, or high temperature grommets installed to prevent contact and abrasion of copper lines.
8. Evacuate system to remove air and moisture. Recharge to manufacturer's specifications.
Water Circulating Pump
Must Be Shut Off Before Charging Begins.
9. Connect tubing to "Water In" line of unit. Extend this line to the cold water supply line at the water tank as close to
the tank as possible. Attach cold water supply with a tee soldered into the line, or a saddle valve of not less than
5/16” opening.
Note:
Less than 50' one way use 1/2" O.D., 50'-90' one way use 5/8" O.D. water lines.
