Aquacal GBB Series Operation Manual page 48

Grid Flow Switch (# 0040S)
Used for automatic pool / spa thermostat switching.
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This kit is not to be used on applications exceeding 50 PSI.
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Liquid Blankets
An invisible liquid heat barrier designed to retain heat and
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extend the swimming season.
®
AquaCal recommends
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Over Temperature Alarm Kit
This kit is an additional safety device. It disables the heat
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pump if any malfunction occurs that allows the water
temperature to surpass a safe level.
This kit is strongly recommended for all spa applications.
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Single Phase Heat Pump - (# STK0221)
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Three Phase Heat Pump - (# STK0222)
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Plumbing Unions
4 Inch Unions - (# PLP0081)
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Page - 45
®
Lo-Chlor Aqua Blanket
™
.