Advantage Engineering Maximum Instruction Manual page 74

MK Series Portable Chiller : Air-Cooled : HE INSTRUMENT
8.3 OPERATIONS BELOW 48°F
A. Chillers supplied with the automatic water supply system, the water
supply connection must be plugged when operating below 48°F or
anytime the system utilizes a water/inhibited propylene glycol
solution. The system must be manually filled and the mix shall be
checked for the proper ratio on a regular basis.
B. Addition of an inhibited propylene glycol solution is required. The
ration shall be according to figure 8.3A. Too much glycol can cause
capacity and control problems. Under no circumstances shall an
automotive type antifreeze be used in the chilling unit.
C. The freezestat and low pressurestat settings must be field adjusted
according to figure 8.3B.
NEVER LOWER THE CUT OUT SETTING WITHOUT ADDING
GLYCOL TO THE CIRCULATING SYSTEM. EVAPORATOR
DAMAGE WILL RESULT AND WILL NOT BE COVERED BY THE
WARRANTY.
OPERATING
TEMPERATURE
40°F
35°F
30°F
OPERATING LOW
TEMPERATURE CUT IN
48°F 63#
40°F 50#
35°F 45#
30°F 40#
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
ANTI-FREEZE MIXTURE
GLYCOL WATER
20% 80%
25% 75%
30% 70%
Figure 8.3A
LOW FREEZESTAT
CUT OUT SETTING
58# 38°F
35# 30°F
30# 25°F
25# 20°F
Fax: 317-881-1277
Figure 8.3B
Page: 74