Form 155.16-N3 (899), IsoFlow Absorption Chillers with Buffalo ...

FIG. 12 – TYPICAL COOLING TOWER PIPING
RUPTURE DISK AND RELIEF PIPING
(HOT WATER UNITS ONLY)
Only the IsoFlow TM absorption chillers that operate on
hot water require a rupture disk. This disk is supplied by
the factory and is sent with the chiller ship loose parts.
The rupture disk is made of a carbon graphite material
that will rupture should the unit pressure exceed 15.0
PSIG. This will protect the unit should there ever be a
tube rupture or the extremely unlikely case of abnormally
high refrigerant vapor pressure inside the unit.
The disk mounts between two neoprene gaskets (also
shipped loose) and two steel flanges. Use graphite on
the screw threads and torque the screws that hold the
rupture disk to a max of 15-1/2 ft.-Lbs.
On the 4" schedule 40 stub provided, butt weld other
sections of 4" pipe and route piping over and down to
terminate approximately 10"- 12" above a floor drain.
Use adequate pipe supports and stand offs to ensure
that no weight from the relief piping is bearing on the
rupture disk or its flange. All relief piping must be installed
in accordance with local, state or federal codes.
YORK INTERNATIONAL
INLET STEAM PIPING
(REFER TO FIG. 13)
FORM 155.16-N3
LD00941
The design level “B” IsoFlow TM absorption chiller is designed
for a maximum pressure of 15 PSIG (103 kPa),
with a maximum steam temperature of 337°F (169°C).
All steam field piping should be installed in accordance
with any local, state or federal codes that may apply.
Piping should be adequately supported and braced independent
of the chiller. The support system must account
for the expansion and contraction of the steam piping,
avoiding the imposition of strain on chiller components.
Steam piping should be designed in accordance with
good engineering practice.
A typical steam piping diagram is laid out in Fig. 13.
The steam supply may be either low pressure steam or
high pressure steam reduced to low pressure steam.
Both steam supply and condensate pipes must be properly
sized and pitched to prevent liquid hammering.
Steam mains should be sized in accordance with the
required steam flow and acceptable pressure drop.
Wherever possible, the steam supply line to the absorp-
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