Nyle e360 - Tools, Materials, and Rough-In

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Water Piping
CAUTION
All information in this manual is superseded by all applica-
ble local codes and regulations. Where codes and guid-
ance from Nyle are in conict, advise Nyle or your local
manufacturer’s representative of the conict.
e-Series heat pump water heaters are designed to be
piped to tank water storage in a “Single-Pass” cong-
uration only. This means water is delivered at a vari-
able rate, at a xed temperature, to the top of a strat-
ied temperature storage tank, and is pulled from the
colder, bottom portion of the tank.
In order to maintain stratication in the tank as well
as minimum temperature rise requirements at the
heat pump, circulating loops from other sources, such
as building recirculation loops or boiler backup heat,
must be handled with a separate “swing tank”, which
is fed by the heat pump storage tank during domestic
hot water demands. See the sample piping diagram
for an example of this strategy.
Flow rates will vary from e-Series units depending on
inlet water temperature, outlet target water temperature,
and ambient temperature. The unit is not an on demand
water heater. Storage tanks are always required.
WARNING
Expansion:
All hot water systems require accommodation for uid
expansion when heated. Ensure that expansion devic-
es such as expansion tanks or compression tanks are
specied and sized by a qualied engineer. T&P Valves
are required on primary storage tanks and should be
sized for the total maximum BTU capacity of all at-
tached heat sources. Failure to properly accommodate
expansion can result in equipment failure, nuisance
callbacks, injury, or death.
Water Temperature Control
Commercial water heating is typically done at storage
temperatures that are dangerous for human contact.
Nyle recommends all water heating systems install
mechanical temperature limiting devices, such as
tempering valves, between storage volumes and the
building’s plumbing xtures. Failure to provide these
safety devices can result in scalding injuries or death.
Water Quality Specications
CAUTION
Components and Water Circuit Additives:
Use only components and joining methods suitable for
potable water usage and suitable for temperatures in
excess of 160 degrees fahrenheit on the water piping
circuit. Only pure water or food grade additives should
ever be used within the water circuit on the heat pump.
Any other additives or contaminants in the water circuit
can render it unusable for potable water heating.
Tank Selection
Temperature stratication is necessary to the proper
operation of Single-Pass systems. To ensure strati-
cation, DO NOT USE horizontal tanks in Single-Pass
domestic water heating systems.
CAUTION
Water Quality:
Water quality is an important concern for human health
and well being. Ensure source supply water is clean and
meets all applicable standards for potable water consump-
tion. In addition, water quality can affect longevity and per-
formance of the heat pump water heater system. Ensure
system water meets, or is treated to meet, the specica-
tions in the table of water quality guidelines in this manual.
Table 6: Water Quality Specications
MG/l or ppm
Alkalinity 70-300
Sulfate <70
HCO3/SO4 >1
Conductivity 10-500 μS/cm
pH 7.5-10
Ammonium <2
Chlorides <100
Free Chlorine <1
Hydrogen Sulde <0.05
Free CO2 <5
Total Hardness 60-120
Nitrate <100
Iron <0.2
Aluminum <0.2
Manganese <0.1