Technical data

2
Standard Features
Frame and Panels
The unit base is heavy-gauge
galvanized steel. The exterior
panels are painted and provide
a durable, weather-resistant fin-
ish.
Indoor or Outdoor
Installation
The weatherproof panels and
rugged components are durable
for placement outdoors. Circu-
lating fluid may be specified
with propylene or ethylene gly-
col to adapt the unit to cold cli-
mates.
Compressor
The compressor is a fully her-
metic, reciprocating design with
overload protection. It has rub-
ber isolated mounting to reduce
noise and vibration. A liquid
line sight glass/moisture indica-
tor is included as well as a man-
ual reset high-pressure switch.
The high-efficiency scroll com-
pressors are standard on 4-ton,
8-ton, and 10-ton models.
Refrigerant Dehydrator
The refrigerant dehydrator
assures a moisture-free refriger-
ant system for extended compo-
nent life.
Expansion Valve
The externally equalized ther-
mostatic expansion valve
smoothly controls refrigerant
flow and provides precise con-
trol of superheat.
Refrigerant Receiver
The refrigerant receiver pro-
vides a liquid seal and storage of
refrigerant when the system is
operating in ambients from
minus 30°F to plus 115°F
(-34°C to +46°C). Performance
will be reduced above 95°F
ambient. Consult factory for de-
rated capacities.
Stainless Steel Pump
To provide a non-ferrous circu-
lating loop to protect sensitive
electronics, a pump with a stain-
less steel housing and impeller
is part of the design.
Fluid Pressure Relief Valve
The 3/4" (2 cm) FPT brass, high
pressure relief valve is mounted
on the inlet pipe to the fluid res-
ervoir expansion tank for safety
protection against system pres-
sures over 50 psi (345 kPa).
Fluid Reservoir Expansion
Tank
The fluid reservoir expansion
tank is manufactured of
14 gauge stainless steel, and
provides thermal storage to act
as a buffer for rapid load
changes and to provide an area
for fluid expansion. Expansion
volume is one gallon (3.8 liters);
maximum working pressure is
50 psi (345 kPa).
Refrigerant Pressure Relief
Valve
A relief valve mounted on the
receiver protects the refrigerant
circuit from high pressure situa-
tions.
Control System
This module contains controls
for fluid temperature, refriger-
ant low pressure switch, manual
reset high pressure switch, low
ambient start relay, compressor
anti-recycle relay, transformer
with circuit breaker and remote
shutdown.
Factory-Installed Options
Refrigerant Gauges
For at-a-glance monitoring, suc-
tion and discharge refrigerant
gauges with large dial faces are
conveniently mounted on the
unit exterior. These gauges are
stainless steel for durability.
(Sold only with tank heater).
Tank Heater
An optional copper sheath/stain-
less steel insertion heater main-
tains minimum fluid
temperature during low ambi-
ent conditions. (Sold only with
refrigerant gauges).
Multistage Pump
(8 and 10-ton models)
This optional pump provides up
to 200 ft (597 kPa) of head pres-
sure at 15 gpm (57 lpm). See
Figure 9 - Process chiller
pump performance—60Hz.
Fluid Thermal Storage Tank
The insulated, stainless steel
tank is built into a frame with
panels, and is factory mounted
and piped below the chiller cabi-
net. The tank is 50 gallons (190
liters) on 3-5 ton models, and
100 gallons (380 liters) on 8 and
10-ton models.
See drawings in “Dimensional
Data” on page -6.