PS-100 User Manual-2005
Contents
1. 100 Sam IT CIRCUIT CONNECTIONS Without pressure applied to the diaphragm switch contacts are in the position shown E Pressure switch can come with SPDT SPST NO or SPST NC circuit arrangement Goldtech Smart Controls Page 5 of 10 OPTIONAL MOUNTING BRACKET Different standard mounting brackets are available for quick installation Customers can also tool up their own bracket design at low cost through our own tooling shop Please contact Goldtech or your local sales representatives for details Gi E 40 00 9 00 WIDE ROUND ENG SLOT 2 46 30 18 30 Bleeding gt Hole OPTIONAL BLEEDING HOLES Optional bleeding holes of 0 4mm or 0 5mm in diameter can be drilled in the Low or High sampling connection as shown in above drawing Bleeding hole is not drilled by default but is available on demand It bleeds off pressure slowly during normal operation in some systems to prevent air e g non stopping exhausted air from being trapped inside the switch chamber Typical Example when the pressure switch is used to sense pulse pressure in a HVAC system Caution if a bleeding hole is built make sure the pressure switch is installed with the bleeding hole at the bottom such that it is not blocked during installation and in normal operation Goldtech Page 6 of 10 Smart Controls INSTALLATION amp APPLICATION SAFETY When installing this product Make sure the installation process is performe2. flexible slip on tubing Custom made design is available Mounting Vertical Horizontal optional Material Diaphragm Silicon Plastic Housing PPO Optional Bracket Brass Steel Terminals 250 6 3 x 0 8 mm Quick connect 187 4 8 x 0 5 mm Quick connect Screw Terminals Soldering Terminals Relative humidity 5 to 95 relative humidity at 40 C tur we tur we ESCHER ES Field Adjustable Set point Model Range amp Accuracy Set point range Set point increase Initial set point per turn at factory PS 112 0 20 1 0 w c ewe 16 ewe 0 20 wc 0 20 wc 0 08 wc 08 w 0 08 wc Recommendation The set point values for your application shall be determined by measuring the pressure differential where the pressure switch will be connected The set points of the pressure switch must be determined by measuring the pressure differential on the position where the pressure switch is to be installed Goldtech Smart Controls Page 3 of 10 CONNECTORS POSITIONS Type 1 Twelve oclock Type 2 Nine o clock Remarks 1 All recommended installation positions are with the diaphragm vertical 2 Connector in upward position is not recommended to avoid water vapor condensation penetrating into the pressure switch AIR SAMPLING CONNECTIONS Com fa NO 4 NC Low L High H Goldtech Smart Controls Page 4 of 10 DIMENSIONAL DRAWING amp MOUNTING HOLES
3. L 7 50mA 5VDC Gold contact SPST NC 8 0 1A125 250VAC SPST NC 9 5A 125 250VAC SPST NC UL UL File Number MH 29861 Approved Ratings 3A 120VAC 60Hz 3A 30VDC 125VA 120VAC Pilot Duty Electrical Endurance gt 100 000 cycles Goldtech Smart Controls 0 A999 Customer Specification Code 4 Digit specification number for each customer made model Bleed Holes O No bleed hole 1 0 5mm dia bleed hole in Hi port 2 0 5mm dia bleed hole in Low port 3 0 5mm dia bleed holes in both connectors Terminal Type 1 6 3 x 0 8 Quick Connect Terminals 2 4 8 x 0 5 Quick Connect Terminals 3 Soldering Terminals 4 Screw Terminals Page 9 of 10 Pressure Conversion Table rs one ote oe mow onto amie emia nent am KREESSER For example 1 mbar 10 1972 mm H2O 1 PSI 27 6806 In H20 1 In HO 0 2491 kPa Goldtech Controls Limited Tel 852 2553 2511 Fax 852 2814 8189 Http Avww goldtech controls com Email sales goldtech controls com Goldtech Eegen of 10 Smart Controls
4. PS 100 Differential Air Pressure Switch Goldtech Smart Controls 18257 SW USER MANUAL APPLICATION The PS 100 PS 110 series differential air pressure switch is designed to be used on air or combustion products such as boilers furnaces and other HVAC equipments functions as airflow and air pressure supervision Featured with factory fixed set point or field adjustable set point versions these switches can be used to sense positive negative or differential air pressure A highly reliable micro switch is used as the power switching element which offers minimum 100 000 cycles under rated load Page General CAMS mee Technical Specifications amp Characteristics ccc ccc ccc cce cece eee cee ee cee cesses eeeteesteateessees O Connectors POSITIONS EE Dimensional Drawings PE E E De Mounting Brackets amp Bleeding Holes 6 Installation Jee le eSNG EE T leie Le Wl Dn e LEE 8 Others Ordering Information 9 Pressure Conversion Table amp Contact Information 10 Goldtech Page 1 of 10 Smart Controls FEATURES m Suitable for positive negative and differential pressure applications E PS 100 110 series switches can be used up to 105 C E Can be used with air or combustion products m Pressure set point can be factory fixed PS 100 or field adjustable PS 110 E Diaphragm responds to pressure changes as low as 25 Pa WORKING PRINCIPAL amp EXAMPLE Consider a typical HVAC
5. d by trained technicians or engineers Follow all appliance instructions carefully Failure to follow the instructions could damage the product or cause a hazardous condition Check that this product has the required pressure and electrical rating for the application On completing the installation check INSTALLATION LOCATION Combustion products usually contain a large quantity of vapor As it cools condensation generated within the switch body and the tubing can shift the pressure set points Mount the pressure switch with the pressure connectors at the bottom so that condensate does not flow or penetrate into the switch The switch should be placed in a position higher than the connecting tubes and the condensate drainage This prevents any liquid flow into the switch PIPING CONNECTION TUBE m The outer diameter of the sensing connector is 7 4 mm or 10 5mm Please refer to drawings in Page 5 a Connection pipe s inner diameter should be 1 5mm approx less than the connector s outer diameter a Plastic or rubber tube is recommended Make sure it is able to sustain the WIRING E Disconnect power supply before making any wiring connections WR All wiring must be followed with the local regulations m When making connections to the switch terminals especially for quick connect Goldtech Smart Controls that all components operate correctly When it is used as the primary safety control of your sys
6. membrane will affect the purpose as this would damage the switch set point of the switch ON Offset OFF Offset Pressure Switch Orientation a Horizontal micro switch upper position a 0 26 mbar b 0 26 mbar a 0 26 mbar b Horizontal micro switch lower position b 0 26 mbar Set point accuracy itch ower 0 25 to 0 80 mbar 0 80 to 2 50 mbar 2 50 to 12 50mbar Orientation 0 10 mbar 0 10 mbar 0 13 mbar 0 13 mbar 0 14 mbar 0 14 mbar 0 17 mbar 0 17 mbar be w Position 1 Position 2 Position 3 Position 1 Diaphragm vertical Position 2 Diaphragm horizontal micro switch is in lower position Position 3 Diaphragm horizontal micro switch is in upper position Example Installation Position amp Condensate Drainage ll eg ne P Goldtech Smart Controls Page 8 of 10 ORDERING INFORMATION PS100 A 1 3 1 PS100 Factory Fixed Setpoint PS112 Field Adjustable Setpoint 0 2 1 0 w c PS113 Field Adjustable Setpoint 1 0 5 0 w c Connector Type A Barbed Connector for 1 4 amp 3 8 ID flexible tubing Connector Low Port Orientation 1 Type 1 Twelve O clock 2 Type 2 Nine O clock 3 Type 3 Three O clock 4 Type 4 Six O clock Contact Rating 1 50mA5VDC Gold contact SPDT 2 0 1A 125 250VAC SPDT 3 5A 125 250VAC SPDT UL 4 50mA 5VDC Gold contact SPST NO 5 0 1A 125 250VAC SPST NO 6 5A 125 250VAC SPST NO U
7. s restricted or blocked which may result a dangerous situation As long as the pressure difference is high enough the switch will be actuated Differential sensing Use both Connection A and Connection B as shown in the circuit above The pressure switch senses a high pressure from inlet H and a low pressure from inlet L respectively As long as the pressure difference is high enough the switch will be actuated Page 2 of 10 SPECIFICATIONS amp CHARACTERICS All specifications and characteristics in this User Manual refer to vertical installation For the applications that require horizontal installation the operation set pint shifts as indicated in Page 8 Switch Set Point 18257 SW Vacuum 0 07 H2O Decreasing Factory Fixed set point 0 07 H2O 0 0025 PSI Maximum Pressure Allowed 6000Pa 0 87PSI Switch Rating 5A resistive 120 277 VAC 0 1 A resistive 120 277 VAC 1 10 hp 120 277 VAC 1A pilot duty 120 VAC 28 VA pilot duty 24VAC Switching Element Snap action switch Contact Arrangement SPDT SPST NO SPST NC Factory Fixed Set points Range amp Accuracy Pressure range Setting ON Setting ON Setting OFF Setting OFF Accuracy E Accuracy 0 10 0 32 w c 0 04 w c 0 32 1 00 w c 0 05 w c Measured Media Air Combustion products Operating Temperature 40 to 105 C Sample Line Connectors Barbed fittings will accept 1 4 or 3 8 ID
8. system as an example Snap action switch UL1054 amp VDE approved with life cycles gt 100 000 cycles at rated load Various types of quick connect terminals are available Flexible connector orientation mounting position and mounting holes are available Various optional mounting brackets are available for easy installation Cooler or Burner When the fan operates properly and the filter is not blocked the pressure of the air released from the fan is larger than atmosphere pressure and that intake to the fan is lower than atmosphere pressure In this system a pressure switch is used for 1 Energy saving When there is no air flow in the air passage the appliance will be switched off Positive sensing Remove Connection A use Connection B only The pressure switch senses a high pressure from inlet H and the atmosphere pressure from inlet L respectively As long as the pressure difference is high enough the switch will be actuated Negative sensing Remove Connection B use Connection A only The pressure switch senses a low pressure from inlet L and the atmosphere pressure from inlet H respectively Goldtech Smart Controls gt Outlet Connection P 2 When abnormal combustion would result from a reduced air flow rate thus pressure drop the appliance must either not start up or shut down if it is already in operation 3 Appliance must stop if the air inlet or outlet become
9. tem it must be part of a safe start circuit A safe start check circuit will not allow the system e g burner to operate unless the pressure switch contacts are in the correct position before the operating cycle begins This ensures the pressure switch and the control circuit are both operating properly and affects the normal operation The surrounding temperature of the switch could not be higher than 105 C Make sure the connection tube you use is able to sustain high temperature Select a position such that convenient connection of the pressure tubing and electrical wiring is allowed The pressure switch shall not be installed in a location where it is subjected to severe vibrating which may change the pressure switch set points highest operating temperature of your system When selecting a tube make sure that it is sufficient pull strength independent ambient temperature changes Use gradual turns in the piping route and avoid sharp bends to ensure correct pressure sensing terminal do not force the switch upward or downward to bend the terminals This will affect the pressure set point Prevent the terminals from contacting any liquid or exposed in a high humid location Page 7 of 10 MOUNTING METHODS m The pressure switch should be installed Use only the holes provided or the with the diaphragm vertical optional mounting bracket for mounting with the diaphragm horizontal the weight of the
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