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  4. 1500 WB 250A-IF
  5. Installation & Maintenance Manual

Riverside Hydronics 1500 WB 250A-IF Installation & Maintenance Manual

Summary of 1500 WB 250A-IF

  • Page 1

    1 34-55 08/14 vt.3 ® water boiler installation & maintenance manual models (400, 500, 650, 750, 850, 900 and 1000) wb 125a-if installation and service must be performed by a qualified service installer, service agency or the gas supplier. Important: this manual contains information required for inst...

  • Page 2

    2 34-55 08/14 table of contents 1. Safety considerations 2. Product description 3. Boiler installation 3.1. Checking equipment before you install 3.2. Codes 3.3. Electrical requirements 3.4. Location 3.5. Service clearances 3.6. Clearances to combustible surfaces 4. General piping guidelines 4.1. In...

  • Page 3

    3 34-55 08/14 9. Temptrac controller panel 9.1. Principle of operation 9.2. Upper led readout 9.3. Lower led readout 9.4. Control buttons 9.5. Modulation firing sequence 9.6. To view the setpoint 9.7. To change the setpoint 9.8. To change other parameters 9.9. Led display alarm messages 10. Boiler c...

  • Page 4

    4 34-55 08/14 1 safety considerations warning: if the information in the supplied manual(s) is not followed exactly, a fire, explosion or exposure to hazardous materials may result, causing property damage, personal injury or death. For your safety • do not store or use gasoline or other flammable v...

  • Page 5

    5 34-55 08/14 2 product description component, controls and connection locations (locations may vary).

  • Page 6

    6 34-55 08/14 3 boiler installation 3.1 checking equipment before you install inspect the unit completely upon receipt from the freight carrier before signing the bill of lading. Inspect the appliance and all accompanying parts for signs of impact or mishandling. Verify the total number of pieces sh...

  • Page 7

    7 34-55 08/14 4 general piping guidelines consult factory for piping of hybrid boiler systems that contain both condensing and non-condensing boilers. 4.1 inlet and outlet connections the connection to the unit marked “inlet” on the header connects to the return from the system (water to be heated)....

  • Page 8

    8 34-55 08/14 4.4 filling the boiler 1 fill the system with water. To be sure that the unit is not “air bound,” open the relief valve. Leave the valve open until a steady flow of water is observed. Close valve and complete filling the system. 2 in hard water areas, water treatment should be used to ...

  • Page 9

    9 34-55 08/14 5 gas supply and piping verify that the type of gas specified on rating plate is supplied to the unit. This unit is orificed for operation up to 2000 feet altitude. Appliance btuh output derates 4% per 1000 feet elevation above sea level. Consult factory for installations above 2000 fe...

  • Page 10

    10 34-55 08/14 5.4 appliance isolation during gas supply piping pressure test 1. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of ½ psi (3.5 kpa). 2. The appliance must be i...

  • Page 11

    11 34-55 08/14 5.7 gas control trains all models include gas control trains with the following components: main gas cock, a dual safety valve, proportionator regulator and a final manual shutoff valve with the manifold pressure tap on the side of the valve. Caution: do not adjust or remove any screw...

  • Page 12

    12 34-55 08/14 the total equivalent length allowed in maximum air inlet duct equivalent length chart above. The sum of this calculation is the maximum length of straight duct allowed. If a longer length is required, repeat the calculation using a larger duct size. No additional deduction is required...

  • Page 13

    13 34-55 08/14 7 venting 7.1 venting the unit using category i, iii or iv venting materials the following instructions can be used to install the vt3 using ul, ulc, etl or csa listed, category i, negative pressure, non-condensing vent materials, like type b venting or it can be installed using small...

  • Page 14

    14 34-55 08/14 warning: do not combine appliances utilizing category i or category ii venting into the same vent system with appliances utilizing category iii or category iv venting. This could cause unsafe operation and the potential for poisonous carbon monoxide to enter occupied areas. Such impro...

  • Page 15

    15 34-55 08/14 7.3.1 maximum category iii or category iv vent length (equivalent length) if a vertical or horizontal category iii or category iv vent system is used with this appliance, the maximum length of field supplied venting is shown in the chart below titled maximum category iii – category iv...

  • Page 16

    16 34-55 08/14 9. A vertical vent must exhaust outside the building at least 3 feet (0.91m) above the point of the exit and at least 2 feet (0.61 m) above the highest point of the roof within a 10-foot (3.05 m) radius of the termination. 10. A vertical termination less than 10 feet (0.91 m) from a p...

  • Page 17

    17 34-55 08/14 caution: do not install a reducing coupling, valve or other restriction in the relief valve(s) discharge line. The discharge line shall allow complete drainage of the valve and line. Relief valves should be manually operated at least once a year. Warning: to prevent burns caused by ho...

  • Page 18

    18 34-55 08/14 9 temptrac™ electronic controller panel 9.1 principle of operation the boiler operates to satisfy the setpoint of the temptrac digital control whose sensor is located in the return line of a hydronic system. Demand (flow) will typically create a drop in temperature, thus activating th...

  • Page 19

    19 34-55 08/14 9.5 modulating firing sequence the boiler is fully modulating and initiates combustion at the lowest firing rate. It will modulate between this lowest possible rate and full rate as the boiler loop temperature rises and falls in relation to the operating set point. The parameters invo...

  • Page 20

    20 34-55 08/14 • c to d: once modulation is established, the sensed loop temperature can fluctuate between 155°f and 145°f (between st4 and sr). The firing rate increases or decreases proportionately between 100% and low fire, depending upon the temperature sensed in the return loop. Temperature ris...

  • Page 21

    21 34-55 08/14 9.9 led display alarm messages alarm messages are displayed in t upper led readout and alternate with the default display. An alarm led icon is also illuminated. (see temptrac user manual 34-80 for full description.) alarm message cause results of alarm condition recommended action “p...

  • Page 22

    22 34-55 08/14 10 boiler control interface a terminal strip for the remote connection is located behind the hinged control panel at the top of the cabinet and is accessed by removing the bottom cover and then removing the screws at the top of the hinged cover. 10.1 if bms/bas provides remote on/off ...

  • Page 23

    23 34-55 08/14 a1-a2: used to activate a remote alarm signaling shutdown of combustion control. Provides a maximum 10 amp relay contact closure when the flame safeguard terminates combustion due to a tripped safety interlock (i.E.: air proving switch high limit switch, low water flow switch or flame...

  • Page 24

    24 34-55 08/14 − in hybrid systems, prioritizes and rotates through up to 12 condensing boilers before energizing and rotating through up to 8 non-condensing boilers. − communicates with boilers by modbus rtu protocol over 485 serial connection (2-wire, shielded daisy chain). − connects to building ...

  • Page 25

    25 34-55 08/14 a. The delay-on (low fire hold) relay and the gas safety valves are energized. B. During tfi the flame safeguard control will monitor the flame using flame rectification through the hot surface igniter. C. If the flame control senses the presence of flame before the end of the tfi per...

  • Page 26

    26 34-55 08/14 12 initial startup 12.1 initial startup requirements installation should be complete prior to performing initial startup; and the startup must be complete prior to placing the boiler into service. Starting the boiler without proper piping, combustion air, venting or electrical systems...

  • Page 27

    27 34-55 08/14 c. Reattach the manometer to the gas train manual shutoff valve at the burner and record the measured gas pressure in inches of water column (w.C.). Measure gas pressure again after 15 minutes. If gas pressure has increased 0.5" w.C. Or more, the gas leak must be isolated to one or mo...

  • Page 28

    28 34-55 08/14 20. After the pre-purge, the flame control energizes the hsi for the heat up period, approximately 30 seconds. At the end of that period the gas valve is opened for approximately 4 seconds. After the burner has lit and the primary safety control senses a flame, the burner will remain ...

  • Page 29

    29 34-55 08/14 manifold pressure regulator adjustment dual safety shutoff valve and regulator valve orifice adjustment gas train illustration for centauri models 250 through 500 regulator adjustment high gas pressure switch dual safety shutoff valve low pressure gas switch manifold pressure valve or...

  • Page 30

    30 34-55 08/14 13 troubleshooting guide problem probable cause corrective action starting or pre-purge failure power supply check fuse and/or circuit breaker. Check voltage at 120/24v step-down transformer. On-off switch check if on-off switch is lighted temperature control check that the operating ...

  • Page 31: Replacement

    31 34-55 08/14 14 replacement parts replacement parts.

  • Page 32

    32 34-55 08/14 14.1 control panel.

  • Page 33

    33 34-55 08/14 14.2 control panel components (optional components may not be included) key no. Part no. Description qty. U/m 1 101947 control, hot surface ignition fenwal #35-679652-551 24v 1 ea 2 104796 control, temperature temptrac #102920 rev a 1 ea 3 115747 drive, variable frequency ac baldor #v...

  • Page 34

    34 34-55 08/14 14.3 burner assembly.

  • Page 35

    35 34-55 08/14 14.4 burner assembly components optional components may not be included) key no. Qty. Part no. Description 1 1 111876 blower, fasco #70430069 2 1 see bom assy, bulkhead refractory 3 1 see bom burner, metal punched 4 6 114513 spacer, nylon 1/4 id x 1/2 od x 11/16 mcmaster c 5 1 115248 ...

  • Page 36

    36 34-55 08/14 15 periodic maintenance listed below are items that must be checked to ensure safe reliable operations. Maintenance must be performed by a qualified service or maintenance provider. To ensure proper maintenance, the following instructions should be posted near the appliance and mainta...

  • Page 37

    37 34-55 08/14 6. The combustion air filter should be replaced every six months. If filter blockage becomes excessive the filter safety switch will not allow the burner to fire. To avoid nuisance shutdown in dirty environments, check and replace filter more frequently. 7. Inspect low water cutoffs a...

  • Page 38

    38 34-55 08/14 16 recommended maintenance schedule 1. Annual maintenance a. Check all joints and pipe connections for tightness, corrosion or deterioration. B. Check the electronic-ignition system for quick ignition and a proper flame signal. C. Check all safety controls including thermostats for pr...

  • Page 39

    39 34-55 08/14 notes:.

  • Page 40

    40 34-55 08/14 model number: serial number: installation date: riverside hydronics , llc • 990 haltom road • ft. Worth, tx 76117 • 1‐800‐990‐5918 • www.Riversidehydronics.Com.