Chiltrix CX34 - Using Glycol

Chiltrix Inc. www.chiltrix.com
Glycol
While not always required, customers in colder climates that are subject to occasional freezing should add an
appropriate percentage of food-grade propylene glycol to the system. NEVER USE ETHYLENE GLYCOL.
Ethylene Glycol is a poison. Propylene Glycol is a non-toxic anti-freeze also used in food, cosmetics, etc. and
can safely be used.
Food-Grade Glycol is available at Home Depot and other retailers. You may also consider HSE Corn Glycol
(Biodegradable Food-Grade Glycol made From Corn
https://www.hotspotenergy.com/corn-glycol/
Below is a Freezing Point Chart For Propylene Glycol Mixed w/ Water
NOTE:
When using CPVC piping it is highly recommended
that you do not exceed a 25% glycol to water ratio.
Environmental Stress Cracking, also referred to as
ESC, may occur. Do NOT use PVC piping.
Flow Rates
Required flow rate changes with the glycol %.
Note the “500” formula water factors are adjusted as follows (based on 2,3 tons capacity):
Example:
Based on load calculations a given system need to deliver
a maximum of 31,000 BTU with 30% glycol:
BTU/31,000/480=6.45 GPM
(BTU/water factor=required flow rate)
Use the required flow rate to calculate head based on the Head Flow Curve on the following page.
Minimum pump speed can be set at P53, minimum speed should not produce a flow rate in your system of
less than 6 L/min and generally should not be set lower than 40%. Pump speed can be monitored at C48, 1 is
lowest and 10 is highest speed. Actual water flow can now be monitored on the desktop and at C13, liters
per minute. Test at full pump speed. 1 L/min = .264 GPM // 1 GPM = 3.78 L/min
00% glycol use 500 24,000/500/10=4.8 GPM
10% glycol use 494 24,000/494/10=4.85 GPM
20% glycol use 488 24,000/488/10=4.91 GPM
30% glycol use 480 24,000/480/10=5.00 GPM
40% glycol use 463 24,000/463/10=5.18 GPM
50% glycol use 442 24,000/442/10=5.43 GPM
00% glycol use 500 36,000/500/10=7.42 GPM
10% glycol use 494 36,000/494/10=7.28 GPM
20% glycol use 488 36,000/488/10=7.37 GPM
30% glycol use 480 36,000/480/10=7.50 GPM
40% glycol use 463 36,000/463/10=7.77 GPM
50% glycol use 442 36,000/442/10=8.14 GPM
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