Install Instructions

103448-08 - 9/16 55
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 ow through the
boiler remain within the limits shown in Table 14, 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 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.
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 (19°C).
2. Direct connection of Alpine boiler to heating
system
, similar to a conventional boiler, is NOT
RECOMMENDED because:
a. The ow rate through system must be the same
as through boiler and fall within limits specied
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
ow at total calculated pressure drop.
VI. Water Piping and Trim B. Piping System To Be Employed (continued)