MSA Chillgard RT - Appendix D Multi-Refrigerant Capability*

D-1
Appendix D
Multi-refrigerant Capability*
* This capability has been evaluated by Underwriter Laboratory, Inc. for
the gas
es listed in TABLE D-1.
Introduction
The Chillgard RT Refrigerant Monitor is available with the capability to
detect up to six different refrigerant gases. This capability is used when
multiple chillers using different refrigerants are located together or in
separate machinery rooms. Only one Chillgard RT Refrigerant Monitor
is necessary. This reduces the initial expense as well as installation,
wiring and cost of ownership expenses.
Your C
hillgard RT Refrigerant Monitor is ordered and built for the
particular types of refrigerants in use. The instrument is ready to
monitor; however, it is necessary to configure the unit to your specific
requirements.
Your C
hillgard RT Refrigerant Monitor contains an internal Multi-Point
Sequencer, enabling your unit to sample from up to eight individual
sampling locations. Each sampling point of the Multi-Point Sequencer
must be assigned one of the refrigerant gas types. This allows the unit
to correctly detect and compute the proper readings for the gas type
specified for that point.
Specifications
Table D-1*. Multi-Refrigerant Chillgard RT Refrigerant Monitor
TYPICAL REFRIGERANT R-11
GASES DETECTED R-12
(UL APPROVED) R-22
R-114
(OTHER GASES R-123
AVAILABLE UPON R-134a
REQUEST BUT NOT R-113
EVALUATED BY UL) R-404a
R-500
R
-502
TEMPERATURE EFFECT +0.3 % / °C of reading for 0 to 35°C
+0.6 % / °C of reading for 35°C to 50°C
RESPONSE
500 FT. (152 M)
13 minutes for a 90% step change
TIME
OF SAMPLING
TUBING LENGTH
150 FT. (46 M)
105 seconds for a 90% step change
OF SAMPLING
TUBING LENGTH