Alpine Installation, Operating, and Service Instructions

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2. Relief Valve Piping, ALP285B and ALP399 Boiler
Models
a. Locate and remove (1) ¾” NPT x close black nipple,
(1) ¾” NPT x 12” black nipple, ¾” NPT black tee,
¾” FPT x ¾” FPT Pressure Relief Valve, ¾” NPT
Drain Valve.
b. Install close nipple into tee branch, then, screw
the assembly into boiler left side front ¾” tapping
making sure tee run outlets are in vertical plane
and parallel to boiler side.
c. Install the ¾” NPT x 12” black nipple into tee run
top outlet.
d. Mount ¾” FPT x ¾” FPT Pressure Relief Valve
onto the 12” nipple.
e. Install Drain Valve into the tee bottom outlet.
3. Temperature /Pressure Gauge Piping, ALP080B thru
ALP210B Boiler Models
a. Locate and remove 1” NPT x 4” long black nipple,
1” x 1” x 1” NPT black tee, 1” x ¼” NPT black
reducing bushing and Temperature & Pressure
Gauge.
b. Mount the nipple into 1” boiler supply tapping (see
Figures 1A and 1B), then, install the tee onto the
nipple, making sure 1” branch outlet is in horizontal
plane and facing the boiler front.
c. Install 1” x ¼” 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” NPT x 2” long black
nipple, 1¼” x 1¼” x ¾” NPT black tee, ¾” x ¼”
NPT black reducing bushing and Temperature &
Pressure Gauge.
b. Mount the nipple into 1¼” boiler supply tapping
(see Figures 1B and 1C), then, install the tee onto
the nipple, making sure ¾” branch outlet is in
horizontal plane and facing the boiler front.
c. Install ¾” x ¼” NPT black reducing bushing into
the tee branch, then, put in Temperature & Pressure
Gauge.
5. Temperature /Pressure Gauge Piping, ALP399 Boiler
Model
a. Locate and remove 1½” NPT x 2” long black
nipple, 1½” x 1½” x ¾” NPT black tee, ¾” x ¼”
NPT black reducing bushing and Temperature &
Pressure Gauge.
b. Mount the nipple into 1½” boiler supply tapping
(see Figures 1B and 1D), then, install the tee onto
the nipple, making sure ¾” branch outlet is in
horizontal plane and facing the boiler front.
c. Install ¾” x ¼” NPT black reducing bushing into
the tee branch, then, put in Temperature & Pressure
Gauge.
B. Piping System To Be Employed.
Alpine (ALP) boilers are designed to operate in a closed
loop pressurized system. Minimum pressure in the
boiler must be 12 PSI. Proper operation of the Alpine
(ALP) boiler requires that the water ow through the
boiler remain within the limits shown in Table 16, any
time the boiler is ring.
NOTICE
Failure to maintain the ow through boiler within
specied limits could result in erratic operation or
premature boiler failure.
1. Near boiler piping must isolate ALP boiler from
system piping via closely spaced tees to insure
specied ow range through boiler any time the
boiler is ring:
a. The ow rate through the isolated near-boiler
loop is maintained by factory recommended and
installer supplied boiler circulator.
b. The ow rate through the isolated near-boiler
loop is completely independent of the ow rate
through the heating system loop(s).
c. The ow 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 17 and
Figure 37 “Near Boiler Piping - Heating
Only” as applicable.
ii. Space heating plus indirect water
heater(s) - refer to Table 17 and Figure 38
“Near Boiler Piping - Heating Plus Indirect
Water Heater” as applicable.
NOTICE
Where it is not possible to install a separate
boiler loop, the system circulator must be
sized to ensure that the ow through boiler
stays within the dened parameters to prevent
overheating when the boiler is red at it’s full
rated input. Install a ow meter to measure the
ow, or re the boiler at full rate and ensure the
boiler DT does not exceed 35°F.
VI. Water Piping and Trim A. Factory Supplied Piping and Trim (continued)