19
19
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connected to the storage tank. If more than one water heating
appliance is connected to the storage tank the aggregate total
of all heating input ratings of all connected appliances must be
factored when choosing a T&P valve for the storage tank.
The pressure rating of the T&P valve should always be rated
equal to or below the working pressure rating of the storage tank
or water heater, whichever rating is lower.
Contact the manufacturer of the storage tank for assistance in
sizing of a temperature and pressure relief valve. Follow the
storage tank manufacturer’s instructions regarding the proper
installation of these products.
TANK SELECTION
The HPWH unit is not an instantaneous water heater and must
be connected to a storage tank. Storage tank configurations must
meet these criteria:
1. The HPWH must not be connected directly to a standard gas
or electric water heater.
2.
3.
If the HPWH is connected to a used storage tank, the tank
should be thoroughly cleaned of scale and sediment before
the HPWH is installed.
Connection ports used on the storage tank must permit the
recommended flow r ate t hrough H PWH. T he connection
ports used on the storage tank must not be smaller than the
inlet outlet connection sizes on the HPWH unit. See Table 4
on page 15.
4. Water heated by the HPWH should be returned to the tank at
a location that is above the level of the tank’s cold water inlet
and/or the heat pump’s inlet source.
5. The HPWH unit’s inlet and outlet lines to the storage tank
should be dedicated. Example: no other line (such as a
building re-circulating loop or cold water supply) should be
connected to the HPWH unit’s inlet or outlet water lines.
SOLAR TANKS
Solar tanks should be used with caution. Some solar tanks with
top connections have dip tubes which may significantly reduce
the efficiency performance of the HPWH unit.
Before using any solar tank in this application, contact your
representative or call the toll free technical support number on
the back cover of this manual for further assistance.
TABLE 5
Water Temperature
Time to Produce 2nd & 3rd
Degree Burns on Adult Skin
180°F (82°C)
Nearly instantaneous
170°F (77°C)
Nearly instantaneous
160°F (71°C)
About 1/2 second
150°F (66°C)
About 1-1/2 seconds
140°F (60°C)
Less than 5 seconds
130°F (54°C)
About 30 seconds
120°F (49°C)
More than 5 minutes
CONTAMINATED WATER
Connecting the heat pump to any system other than a water
system may lead to premature corrosion of the unit's heat
exchanger and void the unit warranty.
Corrosive Chemical Hazard
•
This HPWH unit must not be used to heat any fluid other than
water. Corrosive chemicals must not be introduced into the
waterways in this HPWH unit.
TEMPERATURE - PRESSURE RELIEF VALVE
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in the designated
opening in the storage tank.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
This heat pump water heater should only be connected to a
storage tank with a properly rated/sized and certified combination
temperature - pressure relief valve. The valve must be certified by
a nationally recognized testing laboratory that maintains periodic
inspection of production of listed equipment of materials as
meeting the requirements for Relief Valves for Hot Water Supply
Systems, ANSI Z21.22 • CSA 4.4, and the code requirements of
ASME.
When the HPWH unit is connected to a storage tank a temperature
and pressure relief valve must be installed in the designated
opening for the T&P valve per the storage tank manufacturer’s
requirements. The T&P valve’s Btu/hr rating must be equal to
or greater than the total heating input rating of all water heaters
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7
Potentially harmful fumes and vapors could be introduced
into occupied spaces. See Unit Placement on page 18.
STORAGE & HANDLING
HEAVY OBJECT!
All Heat Pump Water Heaters (HPWHs) covered by this manual
are beyond the safe lifting weight for one person. Use
proper conveyance equipment to move the unit for storage
or during installation. Use OSHA approved safety equipment
when moving the unit.
The heat pump water heaters covered in this manual are
stationary refrigeration appliances. Careful handling is necessary
to prevent internal damage.
• IMPORTANT: Do not remove, cover or deface any
permanent instructions, wiring diagrams, labels, or the
rating label from the outside cabinet or the inside panels on
the HPWH unit.
• Do not tilt the unit beyond 45° at any time. All internal
components are braced from the base of unit. Tilting may
compromise the refrigeration piping inside unit and cause
refrigerant leaks.
• Do not hoist the unit with chains or straps unless
spreader bars are furnished and used as depicted in
Figure 4 and Figure 5. The side panels and roof of the
unit are not constructed to handle significant force from
the sides or above.
• When using a forklift to raise the HPWH unit ensure the
forks are positioned correctly between the runners on the
bottom of the HPWH unit. See Figure 6.
• The HPWH unit must be lifted from the front side only
when using a forklift to raise the unit. See Figure 6.
COMPRESSOR
SIDE
SPREADER
BAR
SUPPORT BARS
RIGGING
FRONT
Figure 4
SPREADER
BAR
SIDE
Figure 5
Figure 6
STORAGE RECOMMENDATIONS
The HPWH units should be stored indoors. Do not stack units or
stack other construction materials on the units while in storage.
The HPWH units contain electrical/electronic components
and should only be stored in conditions between 0ºF to 110°F
(-17°C to 43°C) and 5 to 95 percent relative humidity. Electrical
components are not moisture-tolerant.
NOTE
: The limited warranty does not cover damage to the unit or
controls due to negligence during storage.
The pictures may appear different than your actual unit, all information
and reference to lifting applies to all of our models.
,