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Johnson & Starley HI-SPEC J25SC Series Installation, Commissioning & Servicing Instructions

Warm air heaters system e-t and basic control
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INSTALLATION, COMMISSIONING & SERVICING INSTRUCTIONS
This appliance has been tested and certified by B G Technology for use with natural gas G20.
Note: If a water heater is fitted, these instructions must be read in conjunction with the Installation, Commissioning
and Servicing Instructions for that appliance.
1.
5
13
4
10
6
11
1.1
HI-SPEC J25SC is a fanned-circulation, downflow, ducted warm air heater for SE-duct applications, which may be
supplied with SYSTEM E-T or Basic control, and in combination with an ELJAN 4/SE (electrically switched) water
heater.
1.2
The Air heater output can be adjusted between 6.44kW (23.2MJ/h, 22,000 Btu/h) and 7.3kW (26.4MJ/h, 25,000Btu/h).
"Summer air circulation" of unheated air is available by manual selection (see User's Instructions). ELJAN 4/SE output is
3.32kW (12.0MJ/h, 11,340Btu/h).
These instructions are to be left with the User or adjacent to the Gas Meter
HI-SPEC J25SC SERIES WARM AIR HEATERS
SYSTEM E-T and BASIC Control
BRIEF DESCRIPTION
Fig. 1
THIS APPLIANCE CONFORMS TO BS EN 55014
G.C. No 42 417 96
1
2
3
12
7
8
9
1
Publication No. ZZ 839/6
1
Air Filter
2
Air circulating fan
3
Heat exchanger access cover
4
Data plate
5
Electrical Panel Assembly
6
Multifunctional control
7
Fan delay control/limit switch
8
Viewing port
9
Pilot Burner
10
Burner Assembly
11
Gas supply pipe
12
Piezo igniter unit
13
ELJAN 4/SE Water heater (if fitted)
October 2007

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  • Page 1 These instructions are to be left with the User or adjacent to the Gas Meter HI-SPEC J25SC SERIES WARM AIR HEATERS SYSTEM E-T and BASIC Control INSTALLATION, COMMISSIONING & SERVICING INSTRUCTIONS G.C. No 42 417 96 Publication No. ZZ 839/6 October 2007 This appliance has been tested and certified by B G Technology for use with natural gas G20.

  • Page 2: Ventilation And Combustion Air

    Installation shall be in accordance with the current editions of:- Building Standards (Scotland) (Consolidation) Regulations Building Regulations Gas Safety (Installation and Use) Regulations (as amended) BS7671 Institute of Electrical Engineers (I.E.E.) Wiring Regulations BS6891 Installation of Low Pressure Gas Pipework of up to 28mm (R1) in domestic premises (2nd family gases). BS5440 Pt.1 (Flues for Gas Appliances) BS5440 Pt.2 (Air Supply for Gas Appliances) BS5864 Installation of Gas Fired Ducted Air Heaters...

  • Page 3: Installation

    DUCT SYSTEM All ductwork MUST be mechanically secured and sealed with good quality ducting tape. RETURN AIR 4.1.1 Room-sealed appliances may be installed without return air ducting provided that the path between the return air grille and the appliance return air inlet is protected in such a manner that the required airflow will be maintained at all times.
  • Page 4 Important Dimension Eyebolt position Eyebolt Expanding Spigot Small Rope Ring Large Rope Ring Tie Rod Fixing Bracket Spacer Locknut Front View Side View Fig. 2 HI-SPEC J25RS fitted to SE-Duct - fitting dimensions 5.2.7 Referring to Fig. 2, drill 2 x 9mm diameter holes and fix the eye-bolts using the masonry plugs provided in the installation kit.
  • Page 5 ELECTRICAL 5.5.1 Mains. The heater is supplied with mains cable (PVC sheathed, heat resisting to 85 C), 3-core Brown-Blue- Green/Yellow, 6A, 0.75mm ), connected to a terminal block and exiting through the heater at the top left hand front. The cable is suitable for a 230V 50Hz supply and shall be connected to the fixed wiring using a double pole switched, fused spur, incorporating a protective earth link.
  • Page 6 IGNITION OF PILOT AND MAIN BURNERS: WARNING: If the pilot burner is extinguished either intentionally or unintentionally, no attempt should be made to relight the gas for a minimum of 3 minutes. Ensure that the Electrical supply, time control and Selector switches are set to ‘OFF’.

  • Page 7: Safety Checks

    Operating control Burner Pressure Adjuster Outlet Pressure test point Fig. 4 Multifunctional Control AUTOMATIC CONTROLS CHECK 6.7.1 Ignite the Pilot and Main burners and allow to operate for 15 minutes to ensure stability. 6.7.2 Set the TIME CONTROL (if fitted) to ‘ON’. 6.7.3 Turn the Thermista-stat or room thermostat slowly clockwise until the Main burner ignites.

  • Page 8: Air Volume

    6.8.6 Ignite the pilot and main burners, and check that the Limit switch operates between 120 and 180 seconds (indicated by the main burner extinguishing). 6.8.7 Switch OFF the electrical supply to the air heater. 6.8.8 Reconnect the air circulation fan at the terminal block. 6.8.9 Hinge up the fan chamber door, taking care to avoid causing damage to wiring, and secure using the 3 x screws previously removed.

  • Page 9: Routine Maintenance

    INSTRUCTIONS FOR USERS If the building is unoccupied, ensure that the Instructions for User are left taped to the air heater for the User, and Installation Instructions are left at or near the air heater for use on future service calls. If the building is occupied, hand the User Instructions over and ensure the User understands: 7.2.1 How to ignite the pilot and burner.
  • Page 10 BURNER AND CONTROL ASSEMBLY REMOVAL: 8.2.1 Ensure that the Gas and Electrical supplies are switched OFF 8.2.2 Remove air filter and the appliance door. 8.2.3 Disconnect igniter at the piezo unit. 8.2.4 Disconnect Multifunctional control electrical connections. 8.2.5 Disconnect the gas supply by breaking the union at the input of the Multifunctional control. 8.2.6 Remove the 8 Burner assembly securing screws and withdraw the Burner and Control Assembly.
  • Page 11 ELECTRICAL ASSEMBLY REMOVAL: 8.9.1 Ensure that the electrical supply is isolated. 8.9.2 Remove the appliance front door, release the 2 x securing screws and hinge down the electrical panel. SYSTEM E-T models: 8.9.3 Disconnect the following Air circulation fan flying leads from the capacitor and withdraw from the cable clamp, 230V mains ‘L’, ‘N’...

  • Page 12: Defect Diagnosis

    8.12 TIME CONTROL and SWITCH REMOVAL: ZZ839/3 8.12.1 Ensure that the electrical is isolated. 8.12.2 Remove the appliance front door, release the 2 x securing screws and hinge down the fan chamber door. Time Control removal: 8.12.3 Disconnect conductors ‘C1’, ‘C2’, ‘C3’ and ‘C5’ from the Time control. 8.12.4 Release the 3 x fixing nuts, and withdraw the Time control.
  • Page 13 SYMPTOM POSSIBLE CAUSE REMEDY ZZ839/3 Pilot will not light. i. No gas supply to heater. Check for gas at inlet pressure test point on multifunctional control. ii. Gas supply pipe not purged. Purge gas supply pipe in accordance with BS 6891. iii Pilot orifice restricted.
  • Page 14 Basic control models: Pilot alight but main i. Mains electrical supply not Check mains supply. burner not igniting. connected to heater. ii. Controls not demanding heat Check that time control (if fitted) and room thermostat are operating correctly. iii. T3.15A fuse failed. Replace.
  • Page 15 SYSTEM E-T DEFECT DIAGNOSIS FLOW CHART MAIN BURNER NOT OPERATING TURN GAS PILOT LIT ? ON ? IS 230V LIGHT SWITCH ON SUPPLY PILOT 230 V ON ? IS TIME CONTROL & SET CONTROLS THERMISTA-STAT CORRECTLY CORRECTLY SET ? DISCONNECT THERMISTA-STAT AT TERMINALS ‘7’...
  • Page 16 FAN OPERATES, BUT BURNER CYCLES BEFORE REQUIRED TEMPERATURE IS REACHED DISCONNECT THERMISTA-STAT AT TERMINALS ‘7’ & ‘8’, LINK TERMINALS ‘7’ & ‘TEST’ DO NOT LINK ‘7’ &’8’ DOES THE BURNER REPLACE CONTINUE TO THERMISTA-STAT CYCLE? CHECK RETURN AIR PATH FOR RESTRICTIONS DOES THE BURNER CONTINUE TO...
  • Page 17 FAN RUNS BUT MAIN BURNER NOT OPERATING ‘SUMMER SET ‘SUMMER AIRFLOW’ AIRFLOW SWITCH TO SWITCH ‘0’ SET TO ‘0’ THERMISTA CONNECT -STAT THERMISTA-STAT CONNECTED THERMISTA -STAT SET TO ‘SUMMER AIRFLOW SET THERMISTA-STAT TO REQUIRED TEMPERATURE SETTING DOES FAULT FAN STILL CLEARED RUN ? DISCONNECT THERMISTA-STAT...
  • Page 18 MAIN BURNER ON, BUT FAN NOT RUNNING CHECK FOR DISCONNECT FAN LEADS VOLTAGE AT FROM CAPACITOR, AND TERMINALS CONNECT DIRECT TO FAN 30 & 31 BRIDGE OUT DOES REPLACE FAN DELAY AT CAPACITOR START? TERMINALS 21 & 22 REPLACE FAN DOES DELAY/LIMIT START?
  • Page 19 Fig. 6a, SYSTEM E-T FUNCTIONAL DIAGRAM...
  • Page 20 Fig. 6b, BASIC CONTROL FUNCTIONAL DIAGRAM...
  • Page 23 KNOCKOUTS FOR WATER CONNECTIONS (BOTH SIDES) KNOCKOUT FOR GAS CONNECTION (BOTH SIDES) FRONT VIEW SIDE VIEW REAR VIEW TOP VIEW BASE VIEW Fig. 8, PRINCIPAL DIMENSIONS (mm)

  • Page 24: Short List Of Spares

    SHORT LIST OF SPARES HI-SPEC J25SC G.C No MFR’S No DESCRIPTION BOS02064SP Fan Assembly T193-0145000 Filter Assembly 378 466 BOS 02031 Time Control 381 627 1000-0701140 Multifunctional Control 232 948 BOS 02061 ‘O’ Ring Seal 245 482 S 00556 Pilot Burner Assembly (including gaskets) S01494 Pilot Feed Pipe Kit 1000-2500580...

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