Table 3 — Protective Safety Limits and Control Settings

Monitored Parameter Limit Applicable Comments

Temperature Sensors Ou t Of
Range –40 to 245 F (–40 to 118.3 C ) Must be outside rang e for 2 seconds
Pressure Transducers O ut Of
Range 0.08 to 0.98 Voltage Ratio Must be outside rang e for 2 seconds.
Ratio = Input Voltage ÷ Vol tage Refer-
ence
Compressor Discharge T em-
perature >220 F (104.4 C) Preset, alert setting configurable
Motor Winding Temperature >220 F (104.4 C) Pres et, alert setting configurabl e
Bearing Temperature >185 F (85 C) Preset, alert setting configurable
Evaporator Refrigerant
Temperature
<33 F (for water chilling) (0.6° C) Preset, configure chilled medium for
water (Service1 tab le)
<Brine Refrigerant Trippoint (set point
adjustable from 0 to 40 F [ –18 to 4 C]
for brine chilling)
Configure chilled me dium for brine
(Service 1 t a bl e) . A dj us t b r in e re f r ig er a n t
trippoint for prope r cutout
Transducer Voltage <4.5 vdc > 5.5 vdc Preset
Condenser Pressure — Swi tch
— Control
>263 ± 7 psig (1813 ± 48 kPa), reset
at 180 ± 10 (1241 ± 69 kPa) Preset
>260 psig (1793 kPa) for HC FC-22;
215 psig (1482 kPa) for H FC-134a Preset
Oil Pressure — Switch
— Control
Cutout <11 psid (76 kPad) ± 1.5 psd
(10.3 kPad) Cut-in >16.5 psid
(114 kPad) ± 4 psid (27.5 kP ad)
Preset, no calibrat ion needed
Cutout <15 psid (103 kPad)
Alert <18 psid (124 kPad) Preset
Line Voltage — High
— Low
— Single-cycle
>110% for one minute Preset, based on transf ormed line volt-
age to 24 vac rated-input to the Starter
Management Module. Also monitored a t
PSIO power input.
<90% for one minute or < 85% for 3
seconds
<50% for one cycle
Compressor Motor Load
>110% for 30 seconds Preset
<10% with compressor run ning Preset
>10% with compressor off Preset