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2. Relief Valve Piping, ALP285B Boiler Model
a. Locate and remove (1) ¾ in. NPT x close
black nipple, (1) ¾ in. NPT x 10 in. black
nipple, ¾ in. NPT black tee, ¾ in. FPT x ¾
in. FPT Pressure Relief Valve, ¾ in. NPT
Drain Valve.
b. Install close nipple into tee branch, then,
screw the assembly into boiler left side front
¾ in. tapping making sure tee run outlets
are in vertical plane and parallel to boiler
side.
c. Install the ¾ in. NPT x 10 in. black nipple
into tee run top outlet.
d. Mount ¾ in. FPT x ¾ in. FPT Pressure Relief
Valve onto the 10 in. nipple.
e. Install Drain Valve into the tee bottom outlet.
3. Temperature /Pressure Gauge Piping,
ALP080B through ALP210B Boiler Models
a. Locate and remove 1 in. NPT x 4 in. long
black nipple, 1 in. x 1 in. x 1 in. NPT black
tee, 1 in. x ¼ in. NPT black reducing
bushing and Temperature & Pressure
Gauge.
b. Mount the nipple into 1 in. boiler supply
tapping (see Figures 1A and 1B), then,
install the tee onto the nipple, making sure
1 in. branch outlet is in horizontal plane and
facing the boiler front.
c. Install 1 in. x ¼ in. NPT black reducing
bushing into the tee branch, then, put in
Temperature & Pressure Gauge.
4. Temperature /Pressure Gauge Piping,
ALP285B Boiler Model
a. Locate and remove 1¼ in. NPT x 2 in. long
black nipple, 1¼ in. x 1¼ in. x ¾ in. NPT
black tee, ¾ in. x ¼ in. NPT black reducing
bushing and Temperature & Pressure
Gauge.
b. Mount the nipple into 1¼ in. boiler supply
tapping (see Figures 1B and 1C), then,
install the tee onto the nipple, making sure
¾ in. branch outlet is in horizontal plane and
facing the boiler front.
c. Install ¾ in. x ¼ in. NPT black reducing
bushing into the tee branch, then, put in
Temperature & Pressure Gauge.
B. Piping System To Be Employed.
Alpine boilers are designed to operate in a closed
loop pressurized system. Minimum pressure in
the boiler must be 14.5 PSI (100 kPa). Proper
operation of the Alpine boiler requires that the
water flow through the boiler remain within the
limits shown in Table 14, any time the boiler is
firing.
1. Near boiler piping must isolate ALP boiler
from system piping via closely spaced tees
to insure specified flow range through boiler
any time the boiler is firing:
a. The flow rate through the isolated near-
boiler loop is maintained by factory
recommended and installer supplied boiler
circulator.
b. The flow rate through the isolated near-
boiler loop is
completely independent
of
the flow rate through the heating system
loop(s).
c. The flow rate through the heating system
loop(s) is controlled by installer sized/
provided system loop circulator(s).
d. This piping arrangement can be used either
for space heating-only applications or
space heating with indirect water heater(s)
applications.
i.
Space heating only
-
refer to Table
13 and Figure 21 “Near Boiler Piping -
Heating Only” as applicable.
ii.
Space heating plus indirect water
heater
(s) - refer to Table 13 and Figure
22 “Near Boiler Piping - Heating Plus
Indirect Water Heater” as applicable.
2. Direct connection of Alpine boiler to heating
system
,
similar to a conventional boiler, is NOT
RECOMMENDED because:
a. The flow rate through system must be the
same as through boiler and fall within limits
specified in Table 14.
b. Pressure drop through entire system must
be known, added to pressure drop through
boiler, and, a circulator selected to provide
required flow at total calculated pressure
drop.
c. It is often very difficult to accurately
calculate the pressure drop through the
system.
VI. Water Piping and Trim
(continued)
NOTICE
Failure to maintain the flow through
boiler within specified limits could result in
erratic operation or premature boiler failure.
NOTICE
Where it is not possible to install a
separate boiler loop, the system circulator
must be sized to ensure that the flow through
boiler stays within the defined parameters to
prevent overheating when the boiler is fired
at it’s full rated input. Install a flow meter to
measure the flow, or fire the boiler at full rate
and ensure the boiler DT does not exceed 35°F
(19°C).
Summary of Contents for Alpine ALP080B
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Page 77: ...103448 10 6 18 77 VIII Electrical continued Figure 27 Wiring Connection Diagram...
Page 78: ...78 103448 10 6 18 Figure 28 Ladder Diagram VIII Electrical continued...
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