A.O. Smith THR-160, Инструкция по установке и руководство по эксплуатации и уходу

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Residen al Gas Tankless Water Heater Use and Care Guide • 37
INSTALLATION
Dual Purpose Water
Hea ng for the State
of Massachuse s
• This sec on applicable to
Massachuse s (USA) installa ons
only. Not applicable in Canada.
• Priority Control Devices such as a
fl ow switch, an Aquastat or other
electronic controller can be used
to priori ze the domes c water
system over the hea ng system.
• Follow all local codes, or in the
absence of local codes, follow the
current edi on of the Na onal
Standard Code, ANSI Z21.10.3, CSA
4.3.
• The illustra on below is a concept
design only. The reference to
the 1/8-inch hole in the check
valve is only required in the State
of Massachuse s. There are
a wide variety of varia ons to
the applica on of controls and
equipment presented. Designers
must add all the necessary safety
and auxiliary equipment to
conform to code requirements and
design prac ce. For more details,
contact the manufacturer or local
code authority.
120 VAC
switch or
outlet
Hot w
at
er outlet
Check valve
Electronically controlled
every 6 hours for 60
seconds. Wire to
product approved pump
(used with air-handler)
Cold water supply
Discharge must
comply with local and
state codes. Cannot
be common vented
with other appliances
An approved temperature and pressure
water heater model used
Check valve will have
1/8-inch hole drilling
Atmospheric
vacuum
breaker
valve
Pressure
gauge
Apply correct thermal
expansion tank-size
Check valves
Cold w
at
er inlet
Gas inlet
Water Drain
plug
Hot water
supply and
return to
System installed with reverse
Suggested but not required by
248 CMR
50’-0” maximum distance from
water heater to fan coil.
(Developed length) Not including
NSF-61 product
approved pump
must be installed below
the top of the water heater
as per manufacturer’s
Piping loop
between water
heater and fan
coil shall be in
compliance with
248 CMR
Tempered water to
meet temperature
requirements of 248 CMR
All water piping should be insulated
in accordance with 780 CMR
The ƌĞĐŝƌĐƵůĂƟŽŶ pump is t Ž pr Ž vide ŶŽ less ƚŚĂŶ 2 GPM (7.5 >ͬŵŝŶͿ ĂŶĚ ŶŽ ŵŽƌĞ ƚŚĂŶ 4 GPM (15 >ͬŵŝŶͿ ƚŚƌŽƵŐŚ
each ĂĐƟǀĂ ted ƵŶŝƚ ŝŶ the system.
Ball
Valve
Isola ƟŽ n
Valve
Unions
Figure 32 - Diagramma c Layout of Radiant Hea ng and Domes c Water Heater