Acson ADB075BW, Installation Manual

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1-4
Multiple fan coil unit installation
a. Gate valves (shut-off) are installed in the entering and leaving
piping to the chiller and fan coil unit. This is to permit servicing
and replacement of the equipment without draining the
system. A globe valve may be used to serve as one of the
shut-off valve and in addition to balance the rate.
b. Valves and fittings using threaded or welded joints will require
unions to permit easy removal for servicing or replacement.
Unions are usually located between each gate valve and
the equipment. Unions are also place before and after the
control valve, and in the branch of the 3-way valve.
If flange joints are used, the need for unions is eliminated.
GUIDELINES FOR VALVE AND FITTING INSTALLATION
c. Locate the control valve in between the gate valve and the
equipment to permit removal of the control valve without
draining the system.
d. Strainers, thermometers and pressure gauges are located
between the gate valve and the equipment.
The following diagrams illustrate examples of piping layout:
T
T
FCU 1 FCU 2 FCU 3
GLOBE
VALVE
AIR VENT
3-WAY
DIVERTING
VALVE
** All three fan coil units to serve one area with a common
thermostat. When temperature has reached set point,
thermostat will send signal to 3-way valve to divert
water away.
MAIN SUPPLY OVER FLOW PIPE TO NEAREST DRAIN / FLOOR TRAP
CEILING
RC SLAB
AIR VENT
BALL VALVE
STRAINER
FLEXIBLE HOSE
GATE VALVE
MOTORIZED 3 WAY VALVE
WITH THERMOSTAT
DUCTING
FCU 1
MAKE-UP
WATER TANK
CEILING
RC SLAB
FCU 2
CEILING
RC SLAB
FCU 3
CEILING
CHILLED W
A
TER SUPPL
Y
CHILLED W
A
TER RETURN
RC SLAB
FCU 4
CEILING
RC SLAB
FCU 5
DRAIN PIPE TO NEAREST DRAIN / FLOOR TRAP
T
M
T M
T M
T
M
T
M
MINI AIR
COOLED CHILLER
FLEXIBLE JOINT
CHECK VALVE
PRESSURE GAUGE
THERMOMETER
BALL VALVE
GATE VALVE
GLOVE VALVE
STRAINER
T P
T P
Schematic Diagram For Mini Air Cooled Chiller Installation