JOHNSON CONTROLS
150
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
SECTION 7 – MAINTENANCE
NOTE: Be certain that when
you start sequential operation,
the hot water pump does NOT
start until the two-way valve is
open enough.
If hot water is able to enter
the chiller while the chiller is
stopped, a hot water shutoff
valve or a spring-return type
hot water valve MUST be in-
stalled in the inlet side of the
hot water line.
LD22341
NON-BYPASS CONTROL WITH TWO-WAY VALVE
SCOPE OF SUPPLY
HOT WATER
TWO-WAY
VALVE
TAPPING FOR CHEMICAL CLEANING
TO HEAT SOURCE
FROM HEAT
SOURCE
SAFETY VALVE
STRAINER
HOT WATER PUMP
GENERATOR
LD22039
FLOW DIVERTING CONTROL WITH THREE-WAY VALVE
SCOPE OF SUPPLY
HOT WATER
THREE-WAY
VALVE
TAPPING FOR CHEMICAL CLEANING
TO HEAT SOURCE
FROM HEAT
SOURCE
SAFETY VALVE
STRAINER
HOT WATER PUMP
GENERATOR
LD22040
FLOW MIXING CONTROL WITH TWO-WAY VALVES
SCOPE OF
SUPPLY
HOT WATER
TWO-WAY VALVE
TAPPING FOR CHEMICAL CLEANING
TO HEAT SOURCE
SAFETY VALVE
FROM HEAT
SOURCE
HOT WATER PUMP
STRAINER
GENERATOR
FIGURE 62 - HOT WATER SYSTEM
LD22038a
FLOW MIXING CONTROL WITH THREE-WAY VALVE
SCOPE OF SUPPLY
HOT WATER
THREE-WAY
VALVE
TAPPING FOR CHEMICAL CLEANING
TO HEAT SOURCE
FROM HEAT
SOURCE
STRAINER
HOT WATER PUMP
SAFETY VALVE
GENERATOR
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