U.S. Boiler Company ASPEN ASPN-085, Инструкция по установке, эксплуатации и обслуживанию, Страница: 126 / 180

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Example Pump Parameter selections (continued):
XII. Operation
F. Changing Adjustable Parameters (continued)
Single Boiler with Supply Piped IWH, System and DHW Wired to Master
C
B
B
A
Flow Check
Optional
Full Port
Isolation
Valves
Heating
Circulators
Optional
Full Port
Isolation
Valves
To
System
Expansion Tank
Air Separator
& Air Vent
Close Nipple
(Locate Header Sensor
As Close As Possible
To Downstream Tee)
Hydraulic Separator
May Be Substituted
For Tees
Header Temperature
Sensor
(When Used)
Fill
Valve
Backflow
Preventer
Cold
Water
Line
Y-Strainer
(Recommended)
From
System
Full Port
Isolation
Valves
Indirect
Circulator
Relief Valve
Drain Valve
Secondary Unions Not
Required; Optional
Locations Shown
Full Port
Isolation
Valves
Flow Check
Indirect
Supply
Indirect
Return
Indirect Domestic
Water Heater
(IWH)
At least eight pipe diameters upstream of first tee. A.
No further apart than 12" (~30 cm) or four pipe diameters, whichever is smaller. B.
At least 18" (~46 cm) of straight pipe for Conventional Air Scoop. C.
Boiler Circulator
To
System
Heating
System
Circulator
System
Zone
Valves
Optional Zone Valve
Controlled System
1
CAUTION:
It is the installers responsibility
to select boiler piping configurations that provide
the proper flow rates and performance for the boiler
and indirect water heater.
Parameter Selections:
System Pump = “Central Heat,
Optional Priority”
Boiler Pump = “any demand”
DHW Pump = “Primary Loop Piped IWH”
DHW Priority Enable is optional
Explanation:
When call for Domestic Hot Water is received
the DHW pump is turned on and the boiler
pump is turned on. This piping arrangement
permits the system pump to run or not run
when there is a domestic hot water call for
heat. Domestic hot water priority is optional.
It is permissible for the domestic and system
pumps to run at the same time. The boiler
pump must run for every call for heat.
Parameter Selections:
System Pump = "Central Heat Optional
Priority"
Boiler Pump = "CH, OFF for DHW"
DHW Pump = "Boiler Piped IWH"
Explanation:
Ensure boiler and DHW pump are sized
to maintain flow through boiler within limits
shown in Table 9.3. Only DHW pump runs
during DHW demand. Only Boiler and
System pumps run during CH, Auxiliary
Heat, and Frost Protection demands.
When there is CH demand and DHW
demand has remained on longer than
Priority Time, DHW pump is forced off and
Boiler and System pump will start.
CAUTION:
It is the installers responsibility
to select boiler piping configurations that provide
the proper flow rates and performance for the boiler
and indirect water heater.
Single Boiler with Supply Piped IWH, Heating Top/Indirect Bottom Connection
C
B
A
Flow Check
Optional Full
Port Isolation Valve
Heating Circulator
Optional Full
Port Isolation Valve
To
System
Expansion Tank
Air Separator
& Air Vent
Fill Valve
Backflow Preventer
Cold Water Line
Header Temperature Sensor
(When Used)
Indirect
Supply
Indirect
Return
Indirect Domestic
Water Heater (IWH)
Close Nipple
(Locate Header Sensor
as close as possible to
downstream tee)
From
System
A. At least eight pipe diameters upstream of first tee.
B. No further apart than 12" (~30cm) or four pipe diameters, whichever is smaller.
C. At least 18" (~46cm) of straight pipe for Conventional Air Scoop.
Y-Strainer
(Recommended)
Hydraulic Separator
may be substituted
for tees
Flow Check
Indirect Circulator
Full Port Isolation Valves
Drain Valves
Boiler
Circulator
Flow Check
Full Port Isolation Valves
Relief Vavle
Secondary Unions
(Not Required; Optional
Location Shown)
Optional Zone Valve
Controlled System
Heating
System
Circulator
System
Zone
Valve
To
System