PS-100 User Manual-2005
Contents
1. 9 Ordering Information 10 Pressure Conversion Table amp Contact Information 11 Page 2 of 11 FEATURES Suitable for positive negative and differential pressure applications PS 100 110 series switches can be used up to 105 C Can be used with air or combustion products Pressure set point can be factory fixed PS 100 or field adjustable PS 110 Diaphragm responds to pressure changes as low as 25 Pa 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 WORKING PRINCIPAL amp EXAMPLE Consider a typical HVAC system as an example 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 2 When abnormal combustion would result2. each customer made model Connector Type A Barbed Connector for 1 4 amp 3 8 ID flexible tubing Contact Rating 1 50mA 5VDC 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 UL 7 50mA 5VDC Gold contact SPST NC 8 0 1A 125 250VAC SPST NC 9 5A 125 250VAC SPST NC UL 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 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 UL File Number MH 29861 Approved Ratings 3A 120VAC 60Hz 3A 30VDC 125VA 120VAC Pilot Duty Electrical Endurance gt 100 000 cycles Page 11 of 11 Pressure Conversion Table For example 1 mbar 10 1972 mm H2O 1 PSI 27 6806 In H2O 1 In H2O 0 2491 kPa PSI In H20 In Hg kPa mbar cm H20 mm H20 mm Hg k cm2 Atm 1 PSI 1 0000 27 6806 2 0360 6 8948 68 9475 70 3088 703 0700 51 7149 0 0703 0 0681 1 In H20 0 0361 1 0000 0 0736 0 2491 2 4908 2 5400 25 4000 1 8683 0 0025 0 0025 1 In Hg 0 4912 13 5945 1 0000 3 3864 33 8638 34 5324 345 3240 25 4000 0 0345 0 3342 1 kPa 0 1450 4 0147 0 2953 1 0000 10 0000 10 1974 101 9716 7 5006 0 0102 0 0099 1 mbar 0 0145 0 4015 0 0295 0 1000 1 0000 1 01
3. 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 becomes restricted or blocked which may result a dangerous situation 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 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 3 of 11 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 point shifts as indicated in Page 8 Set Point PS 100 0 1 to 5 0 H2O 0 25 12 5 mbar Factory Fixed set point PS 112 0 2 to 1 0 H2O 0 50 2 50 mbar Field Adjustab
4. 1 00 w c 0 05 w c 0 05 w c 1 00 5 00 w c 10 10 Model Set point range Set point increase per turn Initial set point at factory Tolerance PS 112 0 20 1 0 w c 0 16 w c 0 20 w c 0 08 w c PS 113 1 0 5 0 w c 0 80 w c 1 0 w c 10 Page 4 of 11 CONNECTORS POSITIONS Type 1 Twelve o clock Type 2 Nine o clock Type 3 Three o clock Type 4 Six o clock RECOMMENDED CONNECTORS ORIENTATION 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 NO NC Low L High H L H H Page 5 of 11 DIMENSIONAL DRAWING amp MOUNTING HOLES CIRCUIT CONNECTIONS Without pressure applied to the diaphragm switch contacts are in the position shown Pressure switch can come with SPDT SPST NO or SPST NC circuit arrangement NO NC COM Low High 42 8 32 45 Page 6 of 11 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 OPTIONAL BLEEDING HOLES Op
5. 97 10 1972 0 7501 0 0010 0 0010 1 cm H20 0 0142 0 3937 0 0290 0 0981 0 9806 1 0000 10 0000 0 7355 0010 0 0010 1 mm H20 0 0014 0 0394 0 0029 0 0098 0 0981 0 1000 1 0000 0 0736 0 0001 0 0001 1 mm Hg 0 0193 0 5353 0 0394 0 1333 1 3332 1 3595 13 5954 1 0000 0 0014 0 0013 1 kp cm2 14 2233 393 7110 28 9589 98 0665 980 6650 1000 0200 10000 20 735 5610 1 0000 0 9678 1 atm 14 6959 406 7930 29 9213 101 3250 1013 2500 1033 2500 10332 50 760 0020 1 0332 1 0000 Goldtech Controls Limited Flat A B amp D 23 F E Tat Factory Building 4 Heung Yip Road Wong Chuk Hang Hongkong Tel 852 2553 2511 Fax 852 2814 8189 Http www goldtech controls com Email sales goldtech controls com
6. Page 1 of 11 PS 100 110 Differential Air Pressure Switch 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 Contents Page General Features 2 Technical Specifications amp Characteristics 3 Connectors Positions 4 Dimensional Drawings 5 Mounting Brackets amp Bleeding Holes 6 Installation Installation amp Safety 7 Mounting Methods 8 Others Accessories
7. le Set point PS 113 1 0 to 5 0 H2O 2 5 12 5 mbar Field Adjustable Set point Maximum Pressure Allowed 1 P S I Switch Rating 5 A resistive 120 277 VAC 0 1 A resistive 120 277 VAC 1 10 hp 120 277 VAC 1 A pilot duty 120 VAC 28 VA pilot duty 24VAC Switching Element Snap action switch Contact Arrangement SPDT SPST NO SPST NC Measured Media Air Combustion products Operating Temperature 40 to 105 C Sample Line Connectors Barbed fittings will accept 1 4 or 3 8 ID 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 Factory Fixed Set points Range amp Accuracy Field Adjustable Set point Model Range amp Accuracy 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 Pressure range Setting ON Accuracy Setting ON Accuracy Setting OFF Accuracy Setting OFF Accuracy 0 10 0 32 w c 0 04 w c 0 04 w c 0 32
8. perature changes Use gradual turns in the piping route and avoid sharp bends to ensure correct pressure sensing WIRING Disconnect power supply before making any wiring connections All wiring must be followed with the local regulations When making connections to the switch terminals especially for quick connect 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 8 of 11 MOUNTING METHODS The pressure switch should be installed with the diaphragm vertical When the pressure switch is mounted with the diaphragm horizontal the weight of the membrane will affect the set point of the switch Use only the holes provided or the optional mounting bracket for mounting purpose Do not drill holes for mounting purpose as this would damage the switch Set point accuracy 0 25 to 0 80 mbar 0 80 to 2 50 mbar 2 50 to 12 50mbar Switch Orientation ON OFF ON OFF ON OFF Vertical 0 10 mbar 0 10 mbar 0 13 mbar 0 13 mbar 10 10 Horizontal 0 14 mbar 0 14 mbar 0 17 mbar 0 17 mbar 10 10 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 Po
9. sition amp Condensate Drainage Pressure Switch Orientation ON Offset OFF Offset Default Orientation Diaphragm vertical 0 mbar 0 mbar a Horizontal micro switch upper position b Horizontal micro switch lower position a 0 26 mbar b 0 26 mbar a 0 26 mbar b 0 26 mbar Page 9 of 11 ACCESSORIES 1 Elbow Function The elbow is used to change the inlet direction Tubing can then be connected to the connector with different directions Installation Insert the smooth end of the elbow to the connector with the desired angle directly 2 Restrictor Function The restrictor is used to prevent the air shock rushing to the diaphragm which affects the normal operation of the pressure switch The restrictor prevents this effect by limiting the excess air flowing into the switch Installation Insert the restrictor in the connector directly The smaller hole of the restrictor is placed in an inner position Note The restrictor is difficult to take out once it is inserted into the connector Page 10 of 11 ORDERING INFORMATION PS100 A 1 3 1 0 A999 PS100 Factory Fixed Setpoint PS112 Field Adjustable Setpoint 0 2 1 0 w c PS113 Field Adjustable Setpoint 1 0 5 0 w c Bleed Holes 0 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 Customer Specification Code 4 Digit specification number for
10. ssure switch and the control circuit are both operating properly 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 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 PIPING CONNECTION TUBE The outer diameter of the sensing connector is 7 4 mm or 10 5mm Please refer to drawings in Page 5 Connection pipe s inner diameter should be 1 5mm approx less than the connector s outer diameter Plastic or rubber tube is recommended Make sure it is able to sustain the highest operating temperature of your system When selecting a tube make sure that it is sufficient pull strength independent ambient tem
11. tional 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 Bleeding gt o Hole Page 7 of 11 INSTALLATION amp APPLICATION SAFETY When installing this product Make sure the installation process is performed 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 that all components operate correctly When it is used as the primary safety control of your system 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 pre
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