Lochinvar EFFICIENCY PLUS, Руководство дизайнера

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SPECIAL DESIGN
APPLICATIONS
Air Conditioning Re-Heat System
When used in connection with a refrigeration
system, the boiler
must be installed so the
chilled medium is piped in parallel with the
boiler and with appropriate valves to prevent
the chilled medium from entering the boiler.
The piping system of the hot water boiler
(when connected to heating coils located in
air handling units where they may be
exposed to refrigerated air circulation)
must
be equipped with flow control valves or other
automatic means to prevent gravity circulation
of the boiler water during the cooling cycle.
The heating coil must be vented at the high
point, and the hot water from the boiler must
enter the coil at this point. Due to the fast
heating capacity of the boiler, it is not
necessary to provide a duct-stat to delay
circulator operation. Also, omit thermal flow
checks, as the boiler is cold when the heating
thermostat is satisfied. This provides greater
economy overall by maintaining standby
heat.
AIR REMOVAL
An air separation device should be placed in
the installation piping, on the suction side of
the system pump, to eliminate trapped air in
the system. Locate a system air vent at the
highest point in the system. Additionally, a
properly sized expansion tank may be
required. Air charged, diaphragm type
compression tanks are common. The
expansion tank
must be installed close to the
boiler and on the suction side of the system
pump to ensure proper operation.
18 L o c h i n v a r
D E S I G N E R
’
S G U I D E E F F I C I E N C Y
+
B O I L E R
6 1 5 - 8 8 9 - 8 9 0 0
Lochinvar
EXPANSION
TANK
LOW WATER
FLOW SWITCH
PUMP
B A
C
IN
R
OUT
WATER
SUPPLY
GAS
SUPPLY
DIAGRAM NOTES:
1. VALVES "D" AND "C" MAY BE MANUAL OR AUTOMATIC- TO SUIT.
2. PROVIDE DRAIN FOR RELIEF VALVE "R" TO SAFE PLACE.
3. CLOSE BOTH "A" AND "C" VALVES WHEN RUNNING CHILLER.
4. CLOSE BOTH "B" AND "D" VALVES WHEN RUNNING BOILER.
5. WATER SUPPLY VALVE REMAINS OPEN AT ALL TIMES.
D
E
HEATING &
COOLING
COIL
CHILLER
BOILER
(FIG. 17) HEATING/CHILLED WATER SYSTEM