EarthLinked SCWD-024-1C, Quick Start Instructions

Page: 26 / 62

SCWD-QS (12/16) Page 26
The manufacturer’s specific instructions and industry standards always take precedence when
introducing propylene-glycol to the system.
Calculate the quantity of inhibited propylene-glycol (fluid) required to achieve the desired results.

Introduce a sufficient quantity of water to the system and pressure check to ensure a sealed
system.

Drain some water from the system to provide enough volume for the calculated amount of
fluid.

Add the correct amount of fluid and any water needed to completely refill the system, allowing
for liquid expansion due to operating temperature.

Circulate the inhibited propylene-glycol antifreeze solution for at least 24 hours to ensure
complete mixing. Check the liquid concentration to assure that the correct mixture is obtained.
Note: ETI has a temperature switch available by order, to achieve lower hydronic temperatures.
IMPORTANT!
Always follow the propylene-
glycol manufacturer’s instructions
concerning the water quality specifications before filling the water
circulating system.
IMPORTANT!
Freeze protection is provided on all SCWD compressor units by means
of a factory installed thermal switch that turns the system OFF when
heat exchanger outlet water drops to 38°F.