Daikin EWAH710TZ-XSB2 [14/102] Mechanical options on request
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Daikin EWAH710TZ-XSB2 [14/102] Mechanical options on request

Daikin EWAH220TZ-XSB1 [14/102] Mechanical options on request
13/100
OPTIONS
Mechanical Options – On request
Total Heat Recovery (opt. code 01)
A plate to plate heat exchanger for each refrigerant circuit is installed in series to the air condenser coil. There is
no switch nor solenoid valve in the circuit, thus compressor discharged refrigerant is always flowing through the
heat recovery exchanger and warm water production is always available while the chiller is providing cooling.
During the operation in heat recover the condenser coils provides the sub-cooling ensuring the right amount of
liquid at the inlet of the expansion valve. The unit controller manages the condensing temperature set point in
order to maximize the cooling effect and amount of energy recovered.
The amount of heat recovered is about the 80/85% (according to the operating conditions) of the total heat
rejection of the chiller. The chiller performs the control on the recovery circuit, based on the return water
temperature to the unit. Heat recovery capability is subject to cooling load demand (if no cooling demand is
present then no heat recovery is available) - Opt. incompatibility 03.
Partial Heat Recovery (opt. code 03)
A plate to plate heat exchanger for each refrigerant circuit is installed in series to the air condenser coil.
There is no switch nor solenoid valve in the circuit, thus compressor discharged refrigerant is always flowing
through the heat recovery exchanger and warm water production is always available while the chiller is providing
cooling. During the operation in partial heat recover the super-heated vapor is cooled in the plate heat exchanger
then enters in the coil condenser coils provides the sub-cooling ensuring the right amount of liquid at the inlet of
the expansion valve. The unit controller does not manage the partial heat recover operation. The recover must
be managed from the plant manager that controls the operation of the pump on the recovery circuit. The amount
of heat recovered is about the 15/20% (according to the operating conditions) of the total heat rejection of the
chiller. Heat recovery capability is subject to cooling load demand (if no cooling demand is present then no heat
recovery is available) - Opt. incompatibility 01.
Brine Version (opt. code 08) - Opt. incompatibility 29-142
For operation with temperature at the outlet of the evaporator below +4°C the unit must operate with glycol
mixture (with ethylene or propylene glycol) and the Brine Version option must be selected.
The Brine version provides different set-up according to the series:
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SILVER & GOLD: dedicated control function; 6 poles AC fans controlled with inverter. In order to operate with
low water temperature the speed of the fans will be increased (from the standard speed of 700 RPM up to 900
RPM) according to the operating conditions; Enhanced insulation.
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PLATINUM: Dedicated control; EC fans; Enhanced insulation.
Note: opt. 08 is not compatible with opt. 142 High Ambient kit
Evaporator flange KIT (opt. code 21)
For unit equipped with Shell & Tube exchangers. The flange kit is not available for single circuit units - Opt.
incompatibility 20.
High pressure side manometers (opt. code 63)
Low pressure side manometers (opt. code 64)
Hydronic kits:
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One centrifugal pump (Low lift) (opt. code 78) - Opt. incompatibility – All the other centrifugal pumps.
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One centrifugal pump (high lift) (opt. code 79) - Opt. incompatibility – All the other centrifugal pumps.
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Two centrifugal pump (Low lift) (opt. code 80) - Opt. incompatibility – All the other centrifugal pumps.
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Two centrifugal pump (high lift) (opt. code 81) - Opt. incompatibility – All the other centrifugal pumps.
Unit mounted hydronic kits are available with single and dual pumps.
The Low lift kits provides an average available head of 100 kPa at chiller standard conditions. The High lift kits
provides an average available head of 200 kPa at chiller standard conditions.
The kit is completed with pressure gauge, safety valve, drain valve. The motor pump is protected by a circuit
breaker installed in control panel. The kit is assembled and wired to the control panel. The pipe and pump are
protected from freezing with an additional electrical heater.
In case of unit equipped with hydronic kit on board selected to operate with glycol mixture, contact factory.
Double pressure relief valve with diverter (opt. code 91)
Unit right water connection (opt. code 101)
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Available on dual circuits unit only.

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