JOHNSON CONTROLS
98
SECTION 6 - COMMISSIONING
Form 201.47-ICOM1
Issue date: 17/11/2022
A.
the lowest possible ambient temperature must be
......-or-
B.
completing the following steps:
• Remove the power to the water box heaters
•
• Drain the evaporator
• Leave the evaporator drain valves open
used but continuous power to the chiller control panel,
be guaranteed during periods of subfreezing ambient
temperatures, then one of the freeze damage protec-
tion protocols in the following table must be followed:
Table 16 - YVAA freeze damage protection requirements
Chiller control of chilled fluid
circuit pumps
Actuated suction service
isolation valve
Water box immersion heaters
Ambient air temperatures from
32⁰F (0⁰C) down to 0⁰F (-17.8⁰C)
Required if actuated suction
service isolation valve is not
selected
Required if chilled fluid pumps are
not controlled by chiller control
panel
Not required
Ambient air temperatures below
0⁰F (-17.8⁰C) down to -20⁰F
(-28⁰C)
Required Required Required
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