Daikin FUD 20B Manual De Instalación página 9

Multiple fan coil unit installation
GLOBE
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.
GUIDELINES FOR VALVE AND FITTING 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.
Schematic Diagram For Mini Air Cooled Chiller Installation
MAIN SUPPLY
FLEXIBLE JOINT CHECK VALVE
MINI AIR
COOLED
CHILLER
FCU 1
OVER FLOW PIPE TO NEAREST DRAIN / FLOOR TRAP
MAKE-UP
WATER TANK
PRESSURE GAUGE
THERMOMETER
BALL VALVE
P T
GATE VALVE
GLOVE VALVE
STRAINER
P T
AIR VENT
FCU 2 FCU 3
T
T
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:
3 WAY VALVE WITH
BALL VALVE
THERMOSTAT
GATE VALVE
STRAINER
T M
FLEXIBLE HOSE
DRAIN PIPE TO NEAREST DRAIN / FLOOR TRAP
T M
T M
M
T
T M
1-7
3-WAY
DIVERTING
VALVE
DUCTING
AIR VENT
RC SLAB
FCU 1
CEILING
RC SLAB
FCU 2
CEILING
RC SLAB
FCU 3
CEILING
RC SLAB
FCU 4
CEILING
RC SLAB
FCU 5
CEILING