Daikin Magnitude WME Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM 1266-2 • MAGNITUDE
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MODEL WME CHILLERS 20 www.DaikinApplied.com
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Relief Valves
As a safety precaution and to meet code requirements, each
chiller is equipped with pressure relief valves located on
the condenser and evaporator for the purpose of relieving
excessive refrigerant pressure (caused by equipment
malfunction, fire, etc.) to the atmosphere.
Table 7: WME, C-vintage Relief Valve Data
Evaporator Condenser
Location Top Top
Pressure
Setting (psi)
200 225
Discharge
Capacity
75.5 lb/min. air 84.4 lb/min. air
Qty
1 - 30 & 36 inch vessels
2 - 42 & 48 inch vessels
2 - 26, 30, 36 inch vessels
4 - 42 inch vessels
Connection 1.0-inch female NPT
Most codes require that relief valves be vented to the outside
of a building. Relief piping connections to the relief valves must
have flexible connectors.
CAUTION
Units are shipped with refrigerant valves closed to isolate the
refrigerant in the unit condenser. Valves must remain closed
until startup by the factory service technician.
Remove plastic shipping plugs (if installed) from the inside of
the valves prior to making pipe connections. Whenever vent
piping is installed, the lines must be in accordance with local
code requirements. Where local codes do not apply, the latest
issue of ANSI/ASHRAE Standard 15 code recommendations
must be followed.
Condenser Relief Valves
In order to ensure proper installation, it is important to know
how the three-way relief valve functions. One valve remains
active at all times and the second valve acts as a standby.
When the stem of the three-way valve is pushed into the
valve completely, the valve is in “Front Seated Position” and
all refrigerant will flow through the back outlet port, as shown
in Figure 18 . When the stem of the three-way valve is pulled
back completely, the valve is in “Back Seated Position” and all
refrigerant will flow through the front outlet port, as shown in
Figure 19 .
Figure 17: Condenser Three-Way Relief Valve
Figure 18: Three-Way Valve, Front Seated Position
Figure 19: Three-Way Valve, Back Seated Position
When the valve stem is not pushed forward or pulled back
completely, the valve is in “Mid Position,” as shown in Figure
20.
CAUTION
Do not operate the system with the three-way valve stem in
the Mid Position.
Figure 20: Three-Way Valve, Mid Position
Three-Way Valve
Relief Valves