Honeywell L404A LM L604A F D Pressuretrol@ Controllers IA04 and L604 PressuretrofFJ trollers Con are li7Jevoltage pressure controllers thatprovide oper control automatic limitprotection ormanual ating limit protection forpressure systems 300 psi 21 1 kglcm2 or 2068 kpa reset of up to I I i i I Ii Can be used with steam air non combustible gases or fluids non corrosive to the pressure sensing ele Screw adjustments made top of case English psi and Metric ment Scaleplates marked kgcm2 un
04A D F L604A L M JECIFICATIONS ORDERING INFORMATION Specitications TRADELINE@ MODELS TRADELINE@ models are selected and packaged to provide ease of stocking ease of handling and maximum replacement value Specifications of TRADELlNE@ con trols are the same as those of standard models except is available exCept where noted in Table 1 The steam trap is necessary for boiler installations SWITCH Mercury switch es in all models except the ES IA04F which has a Micro Switch snap acting swit9h PRESSURE SEN
L404A D F L604A L M SPECIFICATIONS TABLE 1 ABLE MODELS AVAll Midscale Subtractive Differential Action on Pressure Rise Operating Ranges Setpoint Model to L404A spst breaks 2to 5 to 50 circuit 10 to 20 to A04 8i I spst makes circuit c 15b 150b 300d f 2 to 15d c e 5 to 50 34 to 345 138 to 2068 14 to 103 69 to 1068 14 to 103 2to6 34 to 345 circuit 10 to 150 14 to 1 0 66 to 10 2 to 15 14 to 10 2 isolated spst circuits or 1 makes R1 W breaks R2 B spdt 35 to 3 5 10 to 150 66 to 10
04A D F L604A L M JPECIFICA nONS DIMENSIONS See Fig 1 See Fig 2 for mounting s trap siphon loop WEIGHT 2 me 0 91 kg FINISH Gray APPROVALS Underwriters Laboratories Inc listed IA04A B C D F L M only file no MP466 L604A l0 v01 no REPLACEMENT PARTS 129178 Thermoplastic Cover 14026 Steam Trap siphon loop l4 in Necessary for boiler installations ACCESSORlES 33312B Knurled on Canadian Standards Association certified L604A L only B C LA04A DF guide noAOO E O file no LR1620 TABLE 2 I main scale pressure
F l604A lM D l404A INSTALLATION Installation WHEN INSTALLING TIllS PRODUCT 1 Read these instructions carefully Failure to follow hazardous them could damage the product or cause a Rlght and loop siphon trap Fig 2 sions in in a steam wrong mounting of dimen with approximate mm condition and on the 2 Check the ratings given in the instructions the product is suitable for your ct to make sure prod application 3 Installer must be a tramed guard control expenenced flame safe technician 4 After in
L404A D F L M L604A INSTALLATION Mounting on a Boiler If it is convenient to mount the controller the pressure gauge install a steam trap siphon not alongside loop in the Fig 3L404 terminal blocks and internal schematics fitting provided by the boiler manufactUrer If there is no fitting mount the steam trap at a location recommended by RISE RISE the boiler manufacturer Screw the controller directly to the steam trap and level the controller Mounting at a Remote B Location If there is excessi
L404A D F L604A L M INSTALLATION Fig 6 l404 with a low Fig voltage relay 8l404F l604A with l604M used as a jumper low limit with installed an or alarm circuit SPOT LOW VOLTAGE RELAY CONTROUER L1 HIGH HOT POWER SUPPLY 24 VOLT THERMOSTAT UMIT 1 a L2 Ll FlAME HOT SAFEGUARD CONTROl POWER SUPPLY Lb MOTOR OR OTHER 12 LOAD LOAD ALARM PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED M8940 PROVIDE DISCONNECT AS REQUIRED MEANB AND BRE R TO B AND MAKES AKS TO SETPOINT
F L604A L M D ETTING AND CHECKOUT 04A Setting and Checkout automatic illy will not main scale setpoint They controllers one these reset of their fonner positions To to the set point minus the wait until the pressure falls reset lever the manual differential Fig 10 Then depress not be reset until will it The controller Fig 11 andrelease reset This lever prevents the con the manual you release reset device if the reset troller from becoming an automatic or down tied lever is stuck held in return to SETIING
L404A F L604A L M D SETTING AND CHECKOUT Boiler Installation If the controller is being used on a boiler installation it as follows test ffi CAUTION Do not 1 Note the boiler pressure sure gauge To perform this by checking the boiler pres testproperly the boiler should have or control and any others burner and boiler manufacturers safeguard required by tlie corresponds gauge readiri g 3 TheL404A or C should break the control circuit s automatically when the boiler pressure gauge reading equals o
Q4A D F L604A L M RVICE INFORMATION Service Information MAINTENANCE CALmRATION The controller carefully calibrated during manufac not require recalibration Most calibra turing and should caused by improper leveling The controller tion errors are the when should be level pointer onthe leveling indicator is The was directly over the index mark leveling indicator may not be Fig 11 accurate In some cases enough the The pointer the index mark but the controller still may not may be over toleran