Daikin MAGNITUDE WME-D, Установка, эксплуатация и обслуживание, Страница: 15 / 56

15
IOM 1372 WWW.DAIKINAPPLIED.COM
INSTALLATION
Water Quality Guidelines
The water quality provided by the owner/occupant/operator/user
to a chiller system should minimize corrosion, scale buildup,
erosion, and biological growth for optimum efficiency of HVAC
equipment without creating a hazard to operating personnel or
the environment. Strainers must be used to protect the chiller
systems from water-borne debris. Daikin Applied will not be
responsible for any water-borne debris damage or water side
damage to the chiller heat exchangers due to improperly treated
water.
Water systems should be cleaned and flushed prior to chiller
installation. Water testing and treatment should be verified during
initial chiller installation/commissioning and maintained on a
continuous basis by water treatment professionals (see Limited
Product Warranty).
WARNING
The improper use of detergents, chemicals, and additives in the
chiller system water may adversely affect chiller performance
and potentially lead to repair costs not covered by warranty. Any
decision to use these products is at the discretion of the owner/
occupant/operator/user and as such they assume full liability/
responsibility for any damage that may occur due to their use.
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 4: WME, D-vintage Relief Valve Data
Evaporator Condenser
Location Top Top
Pressure
Setting (psi)
200 225
Discharge
Capacity
78.8 lb/min. air 88.1 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 15 . 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 16 .
Figure 14: Condenser Three-Way Relief Valve, Three-Way
Valve, Front
Figure 15: Front Seated Position