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Page
-Pressure relief valve-
The micro-boiler has a high-temperature shuto
ff
switch built in as a standard safety feature (called a
Hi-Limit switch) therefore a
“pressure only”
relief valve is required.
•
This unit does not come with an approved pressure relief valve.
•
An approved pressure relief valve must be installed on the hot water outlet.
•
The pressure relief valve must conform to
ANSI Z21.22
or
CAN 1-4.4
and installa
tion
must follow local
codes.
•
The discharge capacity must be at least 199,000 BTU/h
•
The pressure relief valve needs to be rated for a maximum of 150 psi (1 MPa).
•
The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash
on anyone or on nearby equipment.
•
A
tt
ach the discharge tube to the pressure relief valve and run the end of the tube to within 6 in.
(152 mm) from the
floo
r. This discharge tube must allow free and complete drainage without any
res
trictions.
•
If the pressure relief valve installed on the micro-boiler discharges periodically, this may be due to a
def
ecti
ve thermal expansion tank or def
ecti
ve pressure relief valve.
•
The pressure relief valve must be manually operated periodically to check for correct opera
tion.
•
No valve must be placed between the relief valve and the micro-boiler.
CONDENSATE DRAIN
•
The micro-boiler does not include a built-in condensate neutralizer cartridge for reducing the pH level
of condensate water. If local codes dictate that condensate must be neutralized prior to drainage, a
condensate neutralizer must be installed. An accessory Neutralizer assembly is sold separately.
•
In the absence of applicable local codes and regula
tions,
the manufacturer recommends that
condensate be disposed of into a standard drain. Connect a drain tube from the condensate drain port
(shown below) located on the bo
tt
om of the micro-boiler to a standard drain.
Follow all code requirements
of the local authority on
condensate neutralizers and
whether or not they are required
for the installa
tion.
Condensate drain port
