Technical data

3
Optional System Accessories (Field-Installed)
Fluid Pressure Gauge
A 2 ½ inch (6.35 cm) analog
gauge for monitoring supply or
return pressure is available.
The readout is dual scale: 0 to
100 PSI and 0 to 7 BAR.
Dial Thermometer
To provide supply or return
fluid temperature measure-
ment, a hermetically sealed dial
thermometer is available. The
externally adjustable, 2 ½ inch
(6.35 cm) dial is scaled from 20
to 130°F (-6.7 to 54.4°C).
Check Valve
A brass, swing check valve is
offered for installation in the
chiller outlet piping to prevent
backflow through the chiller.
Circuit Setter
This is a calibrated balancing
valve that, when installed in the
chiller outlet piping, provides
for flow balance, flow metering
and shut off of fluid flow.
Water Level Control and
Alarm System
This module automatically adds
water to the thermal storage
reservoir when the water level
drops below a preset level. It
consists of an on/off switch, a 24
VAC control transformer pro-
tected by a circuit breaker, a
flow regulating solenoid valve, a
double check backflow preventer
and time delay relays. The mod-
ule also includes a prewired
RCM4 monitor with local dis-
play and non-powered common
alarm contracts.
Isolation Ball Valve
An available brass, ¼ turn isola-
tion valve provides for isolation
of fluid piping components in
the event of a service necessity.
High Temperature
Thermostat
A remote bulb, adjustable (40-
90°F, 4.4-32°C) thermostat pro-
vides alarm contact when the
fluid temperature rises above a
design limit of system operation.
(See Monitoring and Alarms sec-
tion for RCM8 Monitoring Sys-
tem).
Low Flow Switch
A flow switch provides set point
and alarm contact when fluid
flow falls below a design limit of
system operation. (See Monitor-
ing and Alarms section for
RCM8 Monitoring System.)
Wall-Mounted Monitoring
Box
This unit includes supply and
return ball valves (six total), a
flowmeter, a water filter with
bypass, pressure gauges (sup-
ply and return), temperature
gauges (supply and return) and
3/4" barbed connections.
Emergency Water
Switchover Module (for
systems circulating water)
On a high fluid temperature
alarm or loss of fluid flow alarm,
this unit will automatically
switch to emergency water. This
redundant cooling source pro-
tects your critical equipment
from potentially damaging high
temperatures or unplanned
shutdown. See WARNING
below.
RCM4 Four-Point Dry Con-
tact Monitor is a four-point,
normally open, dry contact mon-
itoring panel. One Form C, dry
contact common alarm relay
output (rated at 24 VAC, 3 amp)
is provided. The RCM4 requires
24 VAC or 24 VDC power
source. Power supply is not
included. Four red LEDs illumi-
nate on alarm and the alarm
buzzer is silenced by a front
panel switch.
RCM8DO Eight-Point Dry
Contact Monitor is an eight-
point, dry contact input and
eight dry contact output moni-
toring panel. It is identical to
the RCM8CE, but with the addi-
tion of eight normally open
relays (rated at 24 VAC or VDC,
1 amp) that will automatically
energize upon alarm of each cor-
responding monitoring point.
RCM8CE Eight-Point Dry
Contact Monitor is an eight-
point, normally open or nor-
mally closed (individually
selectable) dry contact monitor-
ing panel that can be used:
• as a stand-alone panel.
• to dial out on alarm to a
remote location or numeric/
alphanumeric pager.
• to interface with Liebert
SiteScan centralized monitor-
ing systems.
!
WARNING
The emergency water source module is for use on systems that circulate water as the
cooling medium. Using this option on a glycol system will dilute the glycol solution during
emergency operation and could damage the environment as well as violate regulations for
disposing of glycol solutions.