INSTALLATION GUIDE USER MANUAL
7
PIPING RECOMMENDATIONS
Insulate supply and return piping
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drawing on the next page shows
ĨĞĂƚƵƌĞƐƚŚĂƚƐŚŽƵůĚďĞŝŶĐůƵĚĞĚŝŶƚŚĞƉŝƉŝŶŐƐLJƐƚĞŵ͘
Supplemental details
and additional recommendations are listed here:
x
d
rue union or flanged
ǀĂůǀĞƐĨŽƌƐĞƌǀŝĐĞĂďŝůŝƚLJ
z
-
ƐƚƌĂŝŶĞƌ;ϮϬŵĞƐŚͿ
on chiller return line
x
Standard ball valve on purge line
x
Additional ball valve upstream of
Y-strainer for servicing
x
ŚĞĐŬǀĂůǀĞŽŶĐŚŝůůĞƌƐƵƉƉůLJůŝŶĞ
x
dǁŽŽƉƚŝŽŶƐĨŽƌƌĞƚƵƌŶůŝŶĞ͗
;ϭͿ /ŶǀĞƌƚĞĚƚƌĂƉǁŝƚŚĂŝƌǀĞŶƚǀĂůǀĞĂŶĚǀĂĐƵƵŵďƌĞĂŬĞƌ͕Žƌ
;ϮͿ ůĞĐƚƌŽŶŝĐĂĐƚƵĂƚĞĚǀĂůǀĞ͕ǁŝƌĞĚƚŽƉƌŽĐĞƐƐƉƵŵƉƐƚĂƌƚĞƌ
ŝŶĐŚŝůůĞƌĞůĞĐƚƌŝĐĂůĞŶĐůŽƐƵƌĞ
x
Use closed-cell foam insulation
x
Install protective cladding
DĂƚĞƌŝĂůƐ͗^ĐŚĞĚƵůĞϴϬWsŽƌ^
typical for cold glycol/water systems
x
Verify operating temperatures
x
High temp systems may require copper
or stainless steel piping
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ĞdžƚĞƌŶĂůůLJĂƚĐŚŝůůĞƌƐƵƉƉůLJĂŶĚƌĞƚƵƌŶƉŽƌƚƐ
'ůLJĐŽůďĂĐŬĨůŽǁƉƌĞǀĞŶƚŝŽŶŵĞĂƐƵƌĞƐ͗
x
ůŽƐĞďĂůůǀĂůǀĞŽŶƐƵƉƉůLJůŝŶĞ;ĞdžƚĞƌŶĂůƚŽĐŚŝůůĞƌͿ
x
Loosen packing
ŶƵƚŽŶďLJƉĂƐƐǀĂůǀĞ
x
dƵ
rn handwheel
ƚŽĐŚĂŶŐĞƉƌĞƐƐƵƌĞ
x
DŽŶŝƚŽƌƵƐŝŶŐƉƌĞƐƐƵƌĞŐĂƵŐĞŝŶĐŚŝůůĞƌ
x
Retighten packing nut once
pressure is set
EKd/͗
Do not open supply ball valve until gauge shows
pressur
e within
tank jacket rating. If your process pump is equipped with a VFD,
set the control pressure set point to 100 psi then adjust the
bypass valve to a pressure that is lower than the maximum
rated pressure of your process loop. After adjustment is
complete, reset the control pressure setpoint to your desired
operating pressure
.
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GD-20H & GD-27H
MODELS
G&D CHILLERS, INC.
•
GD
-20-27H
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M
S
_CRL-r2021A
Size strainer one pipe size larger than mainline piping size
x
