Sporlan solenoid valve 3-Way Valves
3-Way Heat Reclaim Valves
All Sporlan!ˉs 3-Way Heat Reclaim Valves have a pilot operated design that shifts the refrigerant flow to either the normal condenser or the reclaim condenser based on the heating requirements of the application.!°B!± Ty Normal (Outdoor) Condenser ¨C De-energize See Figure 4. With the pilot valve de-energized, high side pressure Q is prevented from entering the cavity above the piston-seat assembly W. At the same time the upper pilot port is opened to suction pressure E. The resulting pressure differential across the piston moves the piston-seat assembly to close the reclaim condenser port (upper main port). In this mode the system refrigerant flows to the normal condenser. The pilot valve opens the cavity above the piston W, to suction E. This allows the reclaim condenser to be pumped out through a small bleed hole in the piston. The pump out process reduces the reclaim condenser to suction pressure. Once the suction pressure is reached, the flow through the bleed hole in the piston stops. There is no remaining high to low side bleed, with continued operation in the normal condenser mode. For a more efficient pump out of the reclaim .
condenser, a normally open solenoid valve can be added to the lowest physical location of the heat reclaim coil to remove liquid. !°C!± Ty
Normal (Outdoor) Condenser ¨C De-energize. See Figure 4. With the pilot valve de-energized, high side pressure Q is prevented from entering cavity
above the piston-seat assembly W. At the same time the upper pilot port is opened to suction pressure E. The resulting pressure differential across the piston moves the piston-seat assembly to close the reclaim (upper) main port. We use a solid piston ring on the piston thereby eliminating high to low side bleed, and the resulting capacity loss with the system in the normal condenser mode.
!°B!± and !°C!±
Reclaim (Reheat) Condenser ¨C Energize See Figure 5. When the pilot valve is energized, high side pressure Q is permitted to flow through the lower pilot port. At the same time, the upper pilot port is closed to suction E. High side pressure Q, builds up on top of the piston W, moves the piston-seat assembly to close the normal condenser port, and opens the reclaim (upper) main port. With the upper pilot port closed, there is no high to low side bleed with the system in the reclaim mode.
3-Way Split Condenser Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507
The split condenser valve is a relatively simple modification of the standard heat reclaim valve. Figure 7 below shows a split condenser valve. The upper seat and port of the split condenser valve opens and closes. The lower port is always open. During the normal full condenser mode, the refrigerant flow is split evenly between the two halves of the condenser.
When employing heat reclaim in series with the outdoor condenser of a refrigeration system, the required refrigerant charge may be a potential problem.
If a majority or all of the heat is removed from the refrigerant in the heat reclaim coil, some or all of the refrigerant may be in the form of liquid when it
enters the outdoor condenser coil. During this condition, the liquid charge in the system would have to be large enough to completely fill the condenser with
liquid. The requirement for this charge may be reduced by splitting and using only half of the outdoor condenser. During the winter the effectiveness of
the condenser surface area is much greater than it is during the summer. Typically, split condenser valves are controlled by an ambient temperature control
set for a specific outdoor temperature. This usually coincides with the requirement for heat reclaim in the building. In some applications, the control system
will also split the condenser anytime the heat reclaim coil is active.
The pilot valve is different from the standard heat re- claim valve. It is normally open to high pressure. !°B!± and !°C!±.Two Condenser Mode - De-energized
See Figure 8. With the pilot valve de-energized, high side pressure Q is permitted to flow through the lower pilot port at the same time the upper pilot port
is closed to suction W. High side pressure Q built on top of the piston moves the piston-seat assembly down to evenly split the flow between the two condensers. The piston-seat assembly is held in place by a plate located in the Condenser A connection. This plate is designed to limit restriction through that port. With the upper pilot port closed, there is no high to low side bleed and no resulting capacity loss with the system in the two condenser mode.
!°B!± (Bleed) Ty
Single Condenser Mode - Energized See Figure 9. With the pilot valve energized, high side pressure Q is prevented from entering the cavity above
the piston-seat assembly. At the same time the upper pilot port is opened to suction pressure W. This opens the cavity above the piston-seat assembly to suction pressure W. The cavity below the piston is exposed to high pressure. The resulting pressure differential across the piston moves the piston-seat assembly up to close the upper (Condenser B) port. When the upper pilot port opens, Condenser B is pumped out through a small bleed hole in the piston. When Condenser B has been pumped out and reduced to suction pressure, all flow ceases, thus eliminating high to low side bleed and the resulting capacity loss that may occur with the system in the single condenser mode. !°C!± (No Bleed) Ty Single Condenser Mode - Energized See Figure 9. With the pilot valve energized, high side pressure Q is prevented from entering the cavity above the piston-seat assembly. At the same timethe upper pilot port is opened to suction pressure W. This opens the cavity above the piston-seat assembly to suction pressure W. The cavity below the piston is exposed to high pressure. The resulting pressure differential across the piston moves the piston-seat assembly up to close the upper (Condenser B) port. We use a solid piston ring on the piston thereby eliminating high to low side bleed, around the piston and the resulting capacity loss that may occur, with the system in the single condenser mode.
3-Way Hot Gas Defrost Valves
3-Way Hot Gas Defrost valves are used for gas defrost only. One or more compressors are used to provide refrigeration for multiple evaporators, both medium and low temperature. The 3-Way valves are used to control either the flow of gas off a discharge header to the various evaporators, or suction gas from the evaporators to the suction header. The direction of flow is dependent upon whether the pilot valve is energized or de-energized. The same pilot is used on both the 10G79B and 10G711B. As a result of reversing the suction and discharge connections, the 10G711C requires a different pilot assembly. It is NOT interchangeable with the !°B!± series pilot assembly. The 3-Way valve body it take-apart construction, as is the pilot valve and both may be completely serviced in the field. The 10G79B, 10G711B and 10G711C may be installed either upright or on its side. However, it should not be mounted with the coil housing below the valve body.
Type 180 Solenoid Pilot Control
The 180 Solenoid Pilot Control is applicable as a supplementary device to Sporlan Thermostatic Expansion Valves. It is used in place of large capacity
solenoid valves for positive shut-off of liquid lines. Since only one size is necessary it costs less and is more economical to install. The Solenoid Pilot Control does not directly close the liquid line, but acts on the thermostatic expansion valve causing the expansion valve to close. The 180 is installed in the external equalizer line of the thermo-static expansion valve and has a third 1/4!± connection from the liquid line. Principles of Operation The principle upon which the 180 Solenoid Pilot Control influences the expansion valve action is by the creation of a pressure under the valve diaphragm which is higher than the bulb pressure. The Type 180 has two ports, both in the valve body- one high pressure and one low pressure. When the solenoid coil is energized, the plunger moves upward sealing off the high pressure port. See Figure 16, Page 18. With the high pressure excluded from the pilot control, true suction pressure acts on the underside of the expansion valve diaphragm through the equalizer line and the low pressure port. This is illustrated in Figure 15. When the solenoid coil is de-energized, the low pressure port is closed, thereby closing the equalizer line from the valve to the suction line. The high pressure port is open and liquid line pressure is applied to the underside of the thermostatic expansion valve diaphragm. This high side pressure instantly overcomes the bulb pressure and supplements the valve spring, immediately closing the port of the expansion valve.
The Type 180 Solenoid Pilot Control may be connected to any number of thermostatic expansion valves as large as those nominally rated at 180 tons
on Refrigerant 22. Thus one Solenoid Pilot Control simultaneously controls the action of all expansion valves on one evaporator or system of evaporators.
Transformer Selection for Low-Voltage
Control Systems Many systems utilize low voltage controls, requiring the use of a transformer for voltage reduction, normally to 24 volts. The selection of a transformer is not accomplished by merely selecting one that has the proper voltage requirements. The volt-ampere (VA) rating is equally important. To determine the VA requirement for a specific 3-way valve, refer to the chart below. It should be noted, that insufficient transformer capacity will result in reduced operating power or lowering of the MOPD value.
If more than one 3-way valve and/or other accessories are operated from the same transformer, then the transformer VA rating must be determined by adding the individual accessories!ˉ VA requirements
Sporlan 3-Way Valves are not supplied with fuses. Fusing should be according to local codes. We recommend fusing the hot leg of the valve wiring with fast
acting fuses and the valve should be grounded either through the fluid piping or the electrical conduit.
24 VOLTS/ 120 VOLTS/ 240 VOLTS/ TRANSFORMER RATING
50-60 CYCLES 50-60 CYCLES 50-60 CYCLES VOLTS-AMPERES
CURRENT-AMPERES CURRENT-AMPERES CURRENT-AMPERES
FOR 100% OF RATED
MOPD OF VALVE
INRUSH HOLDING INRUSH HOLDING INRUSH HOLDING
1.9 .63 .39 .14 .19 .09 60
3.1 1.4 .60 .26 .31 .13 100