Dravo AH Series Maintenance And Service Manual

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AH - Condensing air handling unit

Maintenance and service manual

ErP

2021

Compliant

EU/2016/2281

code HG0310.00GB ed.A-1908

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Summary of Contents for Dravo AH Series

Page 1 AH - Condensing air handling unit Maintenance and service manual 2021 Compliant EU/2016/2281 code HG0310.00GB ed.A-1908...
Page 2 code HG0310.00GB ed.A-1908...
Page 3: Table Of Contents
Condensing air handling unit INDEX SECTION GENERAL CAUTIONS ..............5 SECTION SAFETY INSTRUCTIONS ............5 Fuel ......................5 Gas Leaks ....................5 Power Supply .................... 5 Use ......................6 Air vents ....................6 Installation ....................6 Maintenance ....................6 Transport and handling ................7 Unpacking ....................
Page 4 Condensing air handling unit SECTION MAINTENANCE ................61 SECTION LIST OF SPARE PARTS ............... 62 Parts for the electrical panel ..............62 9.2 Parts for the burner unit ................62 9.3 Other spare parts available ............... 63 code HG0310.00GB ed.A-1908...
Page 5: General Cautions
Condensing air handling unit GENERAL CAUTIONS SAFETY-RELATED WARNINGS The following symbol is used in this Manual whenever it is This manual is an integral part of the product and must always accompany it. necessary to draw the operator’s attention on a safety issue. Should the equipment be sold or passed on to someone else, Safety rules for users or operators of the always make sure that this manual is supplied with the equipment...
Page 6: Use
Condensing air handling unit The electrical system and, more specifically, the cable • 2.5. Air Vents section, must be suitable for the equipment maximum The room where gas fired heater will be installed must be power input, shown on the nameplate and in this manual. provided with one or more air vents. Do not pull electric cables and keep them away from heat •...
Page 7: Transport And Handling
Condensing air handling unit 2.8. Transport and handling In the first case, use fork extensions as long as heater width. The air handling unit (AHU) is supplied with its own base or placed and properly fixed to a wooden pallet. Unload the heater from the truck and move it to the site of installation by using means of transport suitable for the shape MULTIPLE models and for the weight of the load. Any lifting and transport operations must be carried out by skilled staff, adequately trained and informed on the working procedures and safety regulations.
Page 8: Unpacking
INFORMATION FOR DISPOSAL valid in ITALY (Legislative Decree 49/2014) The AH series air handling units and relating accessories are considered “professional WEEE - waste electrical and electronic equipment”. According to the legislation in force in Italy, professional WEEE must be sent to treatment plants suitable for these types of waste.
Page 9: Technical Features
Condensing air handling unit TECHNICAL FEATURES Ventilation Operation WINTER During “Heating” operation (in winter), CPU PCB regulates ventilation by modulating the rotation speed on the basis of 3.1. Main Components the heat output (parameter H16 = 2) and of the values set in parameters H12 and H13: AH air handling units are designed for indoor air heating.
Page 10: Technical Data
Condensing air handling unit 3.2. Technical Data NOTES: There are two types of A H, both available for low or high pressures Symbol in compliance with Reg.EU/2281/2016. and defined as follows: (1) PCH module envelope losses are considered null since it is positioned inside the AH unit ventilation section. Single-module; (2) Max. condensation produced acquired from testing at 30%Qn. Multiple-modules. (3) Value referred to category H (G20). (4) Weighted value to EN1020:2009 ref. to cat. H (G20), referred to net calorific Single-Module unit value (Hi, N.C.V).
Page 11 Condensing air handling unit B - Multiple modules NOTES: The multiple-module air handling units consist of two or more Symbol in compliance with Reg.EU/2281/2016. heat exchangers; the number of burners and gas equipment (1) PCH module envelope losses are considered null since it is positioned match the number of heat exchangers. inside the AH unit ventilation section. The gas connection is individual for each module.
Page 12: Dimensions
Condensing air handling unit 3.3. Dimensions Models: AH034, AH065 and AH105 - VERTICAL (- xxV0) HG0310.00_XX 0001 4 x M8 1698 4 x M8 4 x M8 Model: AH034 and AH065 1535 Model: AH105 SELECT OPTION CROSS CHOICE PESO G MATERIALE Quote senza indicazione di 6 x M8 tolleranza: Classe di Tolleranza 219349.52 ISO 2768 - M per lavorazioni in tranciatura...
Page 13 Condensing air handling unit Models: AH034, AH065 and AH105 - HORIZONTAL (- xxH0) 4 x M8 4 x M8 1698 4 x M8 1535 HG0310.00_XX 0004 Model: AH034 and AH065 Model: AH105 PESO G MATERIALE Quote senza indicazione di tolleranza: 4 x M8 4 x M8 6 x M8 4 x M8 Classe di Tolleranza 226916.16 1284...
Page 14 Condensing air handling unit Models: AH160, AH210, AH320 and AH420 - VERTICAL (- xxV0) HG0310.00_XX 0006 n x M8 8n x M8 INLET AIR Model Modules Overall dimensions [mm] AH160 1250 1698 2330 1580 INLET AIR AH210 1250 1698 2330 1580 (exceptionally AH320 1875 1698 2460 1580 AH420 2500 1698 2460 1580...
Page 15 Condensing air handling unit 8 x M8 8 x M8 8n x M8 Model Modules Overall dimensions [mm] AH160 1605 1698 1460 AH210 1605 1698 1460 AH320 PESO G 1605 1698 2085 PESO G MATERIALE MATERIALE Quote senza indicazione di Quote senza indicazione di tolleranza: tolleranza:...
Page 16: Air Flow Rate Curves - Available Pressure/Power Consumption
Condensing air handling unit Air flow rate curves - Available pressure 3.4. AH034 diagram Air flow rate - Pressure drop [Q - 10 V] 1000 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 Air Flow Rate at 15°C [m AH065 diagram Air flow rate - Pressure drop [Q - 10 V] 1000 3000 4000 5000 6000 7000...
Page 17 Condensing air handling unit AH080 diagram (for AH160) Air flow rate - Pressure drop [Q - 10 V] 1000 3000 4000 5000 6000 7000 8000 9000 10000 11000 Air Flow Rate at 15°C [m AH105 diagram Air flow rate - Pressure drop [Q - 10 V] 1000 3000 4000 5000 6000 7000 8000 9000 10000 11000 Air Flow Rate at 15°C [m code HG0310.00GB ed.A-1908...
Page 18 Condensing air handling unit Air flow rates - Pressure drops of multiple models For multiple modules (AH160, AH210, AH320 and AH420), with the same available pressure (ΔP), multiply air flow rates by the number of modules composing them, as indicated below: - AH160 = 2 x AH080 - AH210 = 2 x AH105 - AH320 = 3 x AH105 - AH420 = 4 x AH105 Example: →...
Page 19: User Instructions
Condensing air handling unit USER'S INSTRUCTIONS MASTER and SLAVE modules • “MASTER” module = It manages the regulation of the entire AH unit. The “MASTER” module is used for the connections on the user’s side (external connection section) and for direct 4.1.
Page 20: Smart Web
Condensing air handling unit NOTE: Every time you wish to change the "ON/OFF 4.2. Smart Web Priority" status a message for confirming the action to The Smart Web remote control equipped as standard is supplied be performed is displayed. Press "OK" to confirm. Press already configured with the type of system and with all the the back key to cancel parameters necessary for the air handling unit to work to its...
Page 21 The setpoints default settings of the different controls are the 10:15 Monday Mon 01 Jan following: • T_NEVE °C (SNOW Contr.) (Not Used) • SET_NEVE 23.0 °C (SNOW Contr.) (Not Used) • PREX_NEVE (SNOW Contr.) (Not Used) • PREX_MIN (PRESS. Contr.) (Not Used) • PREX_MAX (FILTER Contr.) • PREX_MAX2 (FILTER Contr.) •...
Page 22: Remote On/Off
Condensing air handling unit Remote On/Off (OPTIONAL) 10:15 Inputs Mon 01 Jan 4.3. Any priority ON/OFF contact can be remotely controlled from the NTC_On Board T_RIF 20.0 Smart Web remote control, by connecting to terminals 1 (ID1) and 2 (GND) of the terminal board M2 of the chronothermostat AN1_Ext T_RIF 22.3 and removing the existing jumper, as shown in the following AN2_Ext NONE -10.0 wiring diagram. See HG0060.00 manual, paragraph 9. "Electrical Connections", supplied with the remote control. AN3_Ext T_RIF -10.0 The ON/ OFF contact has priority with respect to the heat request of time ranges or manual mode, but not with respect to the snow function heat request, which is independent (optional, depending on the model).
Page 23: Pressure Control
Condensing air handling unit To reset the FAULT in case of FILTER ALARM, directly press 4.4. Filter control (OPTIONAL) on the FILTERS icon displayed in the “HOME” page. AH air handling units, if purchased with a side or lower optional intake filter kit, are equipped with a pressure sensor to constantly 10:15 HOME Mon 01 Jan control the status of installed filters. 20.7 Depending on the configured Setpoints and on the pressure °C difference detected upstream or downstream of filters, the Smart Web will issue two different levels of alarms through an icon DIRTY inside the HOME page, as indicated below: SET: OFF 10:15 HOME Mon 01 Jan 20.7 °C CLEAN...
Page 24 Condensing air handling unit Please find here below the Filter Control logic. ELECTRICAL CONNECTION The function must be selected inside the “System type (Connection to be carried out only on “MASTER” module) management” section and with the “Hot Air Heater” system type. During AHU operation, the detected pressure values, obtained by calculating the pressure difference upstream and downstream HG0300.00_IM 013 of filters, will be displayed inside the ventilating section. Pressure value = “0” (fans stopped) Pressure value = “Variable” (fans operating) EARLY WARNING - DIRTY (YELLOW) G13900 When PREX_MAX value (200 Pa by default) is exceeded, the icon colour changes from GREY to YELLOW.
Page 25: Web Configuration
Condensing air handling unit WEB configuration 4.5. IT is possible to configure the Smart Web remote control so as to manage it entirely through a PC (or other device) connected to a private local network (Intranet). In order to use the Smart Web remotely the network control must be connected with an Ethernet cable of the direct RJ45 type. For more information regarding the chronothermostat settings and configuration, please refer to the manual enclosed with the product. code HG0310.00GB ed.A-1908...
Page 26: Installation Instructions
Condensing air handling unit INSTALLATION INSTRUCTIONS 5.2. Installation Connecting Air Ductwork Instructions for installing and setting the air handling unit are Ducts for air delivery and intake shall be sized based on aeraulic intended for suitably qualified personnel only. We recommend performance of the unit (shown in “TECHNICAL DATA” section the installer to read safety warnings. of this Manual). A vibration damping joint should be installed on air delivery duct 5.1.
Page 27: Wiring To Power Supply
Condensing air handling unit 5.4. Wiring to Power Supply SINGLE-PHASE models: AH034 AH air handling units are supplied with a main plug, shown in the figure. Wire power supply directly to the plug. MODIFICA DISEGNATA DA MODIFICA APPROVATA DA DESCRIZIONE MODIFICA DATA MODIFICA S i n g l e 230V+N Wire phase L1 to pole 1 and neutral N phase to terminal 4 400V+N Wire three phases L1, L2 and L3 to...
Page 28 Condensing air handling unit IMPORTANT: A main switch must be installed before SMART WEB and FIRE DAMPER ELECTRICAL CONNECTION the control panel of the unit. This switch must include a protection (fuses or automatic) and must comply with existing regulations. Fuse type, if used, must be rapid. If automatic switch are used, HG0300.00_IM 013 the characteristic curve for their triggering must be of type "K"...
Page 29: Connections To The Flue
Condensing air handling unit 5.5. Connections to the Flue Common chimney Where possible, it is always preferable to use independent The PCH heater module, contained inside the AH units, is fitted exhausts; AH module exhausts are pressurised, therefore in with a watertight combustion circuit and with the burner fan this way it is possible to prevent incorrect sizing from causing located upstream of the heat exchanger. a system malfunction.
Page 30 Condensing air handling unit AH units can be supplied with (OPTIONAL) “independent flue outlet” chimneys as shown in the image below. For multiple models, AH160, AH210, AH320 and AH420, it is possible to request the (OPTIONAL) “multiple flue outlet” chimney as indicated in the following table: For AH VERTICAL UnitI (- xxV0) INDEPENDENT flue outlet kit COMMON flue outlet kit Model (aluminium) (stainless steel) Code Code Not available AH034xx - xxV0 G18165-105 Not available AH065xx - xxV0 G18165-105 Not available AH105xx - xxV0 G18165-105 AH160xx - xxV0 2 x G18165-105...
Page 31 Condensing air handling unit Model: AH160 / AH210 (- xxV0) with COMMON flue outlet HG0310.00_XX 0009 Model: AH320 (- xxV0) with COMMON flue outlet PESO G PESO G MATERIALE MATERIALE Quote senza indicazione di Quote senza indicazione di HG0310.00_XX 0010 Materiale <non specificato>...
Page 32 Condensing air handling unit Model: AH034 / AH065 / AH105 (- xxH0) with INDEPENDENT flue outlet HG0310.00_XX 0007 PESO G PESO G MATERIALE MATERIALE Quote senza indicazione di Quote senza indicazione di Model: AH160 / AH210 (- xxH0) with INDEPENDENT flue outlet Materiale <non specificato>...
Page 33 Condensing air handling unit Model: AH160 / AH210 (- xxH0) with COMMON flue outlet HG0310.00_XX 0014 PESO G PESO G MATERIALE MATERIALE Quote senza indicazione di Quote senza indicazione di Materiale <non specificato> Materiale <non specificato> tolleranza: tolleranza: Classe di Tolleranza Classe di Tolleranza 611.62 611.62...
Page 34 Condensing air handling unit Model: AH420 (- xxH0) with COMMON flue outlet HG0310.00_XX 0016 NOTES: Accessories included for HORIZONTAL Common Flue outlet - AH420 (- xxH0) PESO G PESO G Quote senza indicazione di Quote sen tolleranza: tolleranz Classe di Tolleranza Classe di 1166.79 1166.79 ISO 2768 - M per lavorazioni in tranciatura ISO 276 con dimensioni fino a 100mm ISO 2768 - C...
Page 35: Condensate Drain
Condensing air handling unit Model: AH034 / AH065 / AH105 VERTICAL 5.6. Condensate drain Special attention must be paid to the condensate drain; an incorrectly installed drain, in fact, could jeopardize the correct operation of the equipment. The factors to be taken into account are: risk of condensation build-up inside the heat exchanger; • • risk of condensation water freezing in the pipes; risk of flue gas discharged from the condensate drain. • Build up of condensation in the heat exchanger During normal operation, condensate must not be allowed to accumulate within the heat exchanger.
Page 36: Gas Connection
Condensing air handling unit IMPORTANT: For proper maintenance, connect the AH 5.7. GAS Connection module by means of a seal and swivel gasket. Use the gas line connections only with CE certified components. Avoid using threaded connections directly on the gas connection. AH modules are supplied complete with: Current legislation allows a maximum pressure inside the rooms, • dual gas valve; or thermal stations, of 40 mbar; higher pressure values must stabiliser and gas filter.
Page 37: Fire Damper Installation
Condensing air handling unit 5.8. Fire damper installation The fire damper is available as optional equipment, both at intake and delivery. Fire dampers consist of a galvanised iron sheet frame, the compartmentalisation and sealing blade and the blade closing device. All dampers have the following specifications: reaction to fire EI120S • • thermal cut-out with fuse set on 72°C; microswitch, IP55, supplied as a standard and installed •...
Page 38: Accessories
Condensing air handling unit ACCESSORIES (OPTIONAL) Connection and installation of available accessories Connections and installation of any available OPTIONAL accessories are shown below with relevant different configurations. 6.1. Single-Module Units VERTICAL configuration (- xxV0) “Standard” side intake panel PESO G PESO G PESO G PESO G MATERIALE MATERIALE MATERIALE MATERIALE Quote senza indicazione di Quote senza indicazione di Quote senza indicazione di Quote senza indicazione di Materi...
Page 39 Condensing air handling unit SINGLE VERTICAL Models (- xxV0) Model Code POS. Accessory AH034 AH065 AH105 G23646 G23666 G23686 G23647 G23667 G23687 G23648 G23668 G23688 FLXHM034 FLXHM065 FLXHM105 FLXHM034-L FLXHM065-L FLXHM105-L G23641 G23661 G23681 G23644 G23664 G23684 PLXHM034 PLXHM065 PLXHM105 G23645 G23665 G23685...
Page 40 3858-F G23878-F 23664 G23684 23665 G23685 13613 G13613 13612 G13612 04893 G04893 Condensing air handling unit HORIZONTAL configuration (- xxH0) “Standard” rear closing panel HG0310.00_XX 0028 “Standard” side intake panel MATERIALE Quote senza indicazione di Materiale <non specificato> tolleranza: Classe di Tolleranza ISO 2768 - M per lavorazioni in tranciatura DESCRIZIONE DATA...
Page 41 Condensing air handling unit SINGLE HORIZONTAL Models (- xxH0) Model Code POS. Accessory AH034 AH065 AH105 G23646 G23666 G23686 G23647 G23667 G23687 G23648 G23668 G23688 FLXHM034 FLXHM065 FLXHM105 G13613 G13613 G13613 G23641-H G23661-H G23681-H G23644 G23664 G23684 G13612 G13612 G13612 Supplied as STANDARD Supplied as STANDARD Supplied as STANDARD...
Page 42: Multiple-Module Unit
Condensing air handling unit 6.2. Multiple-Module Units VERTICAL configuration (- xxV0) PESO G Quote senza indicazione tolleranza: HG0310.00_XX 0020 Classe di Tolleranza 2218330.72 ISO 2768 - M per lavorazio con dimensi ISO 2768 - C FOGLIO ApenGr Heating and Conditi ACCESSORIES DISEGNO DI PROPRIETA' FIRE Damper Intake G3 FILTER FIRE Damper Duct...
Page 43 Condensing air handling unit MULTIPLE VERTICAL Models (- xxV0) Model Code POS. Accessory AH160 / AH210 AH320 AH420 G23726 G23736 G23746 Included with "G23726" Included with "G23736" Included with "G23746" G23727 G23737 G23747 G23728 G23738 G23748 G23729 G23739 G23749 FLXHM210 FLXHM320 FLXHM420 G23721 G23731 G23741 G23724 G23734 G23744 G23723...
Page 44 Condensing air handling unit HORIZONTAL configuration (- xxH0) HG0310.00_XX 0022 “Standard” side intake panel ACCESSORIES PESO G MATERIALE Quote senza indicazione di tolleranza: Classe di Tolleranza FIRE Damper Intake G3 FILTER 2176054.15 ISO 2768 - M per lavorazioni in tranciatura con dimensioni fino a 100mm DESCRIZIONE ISO 2768 - C FOGLIO...
Page 45 Condensing air handling unit MULTIPLE HORIZONTAL Models (- xxH0) Model Code POS. Accessory AH160 / AH210 AH320 AH420 G23726 G23736 G23746 Included with "G23726" Included with "G23736" Included with "G23746" G23727 G23737 G23747 G23728 G23738 G23748 G23729 G23739 G23749 FLXHM210 FLXHM320 FLXHM420 G23681-H G23681-H G23681-H G23724 G23734 G23744 Supplied as STANDARD...
Page 46: Air Intake Filters
Condensing air handling unit 6.3. Air Intake Filters The two types of OPTIONAL “Air Intake Filters” are shown below. VERTICAL configuration (- xxV0) with lower intake. code HG0310.00GB ed.A-1908...
Page 47 Condensing air handling unit code HG0310.00GB ed.A-1908...
Page 48 Condensing air handling unit HORIZONTAL configuration (- xxH0) with side intake. (AH320 and AH420 MODELS EXCLUDED) [For AH160 and AH210 models, intake filters must be placed on both sides]. code HG0310.00GB ed.A-1908...
Page 49 Condensing air handling unit code HG0310.00GB ed.A-1908...
Page 50: Delivery Plenum
Condensing air handling unit Single-Module Units. 6.4. Delivery Plenum The different types of OPTIONAL “Air Delivery Plenum” accessory available for AH units in VERTICAL version (- xxV0) are shown below. The Air Intake Plenum consists of modular vents (no. 2 vents for AH045 modules and no. 3 vents for AH105 modules), each orientable in the four 0°, 90°, 180° and 270° positions: 0° 90° 180° 270° Multiple-Module Units HG0310.00_XX 0024 code HG0310.00GB ed.A-1908...
Page 51: Servicing Instructions
Condensing air handling unit SERVICING INSTRUCTIONS 7.2. Interface Panel The CPU-SMART PCB is connected to a Smart Web where it is possible to display and modify all the parameters. 7.1. Operating Cycle The service centre requiring to work on such parameters must enter the relevant level password. The operation of AH units is fully automatic; they are equipped with electronic equipment with self-check function that manages all the AH units are fitted as standard also with a multifunction LCD panel burner control and monitoring operations, with a microprocessor-...
Page 52: Modulation Pcb Parameters
Condensing air handling unit 7.4. Modulation PCB Parameters All values of the parameters of the CPU-SMART PCB are shown for all AH unit models. (1) parameters that could be modified with "001” Password via remote LCD control (even with modbus address ≠ 0). • (2) parameters that could be modified with a second level Password which can be requested to the manufacturer's Service • Centre (even with modbus ≠ 0 address). (3) parameters that could be modified only with a Smart Web or via modbus. • Parameters of CPU-SMART PCB version 7.03.xx PARAMETER DESCRIPTION AH034...
Page 53 Condensing air handling unit Parameters of CPU-SMART PCB version 7.03.xx PARAMETER DESCRIPTION AH034 AH065 AH105 AH160 AH210 AH320 AH420 ID6 - Blower fan control: 0=input disabled; 1=enabled with N.C. input required; 2=enabled with N.O. input required; 3= enabled b17 (2) with N.C. input required with auto-reset; Heat input and fuel instantaneous consumption calculation parameters (a)(b)(c)(d) 12.4 21.0 16.4 21.0 21.0 21.0 Minimum heat input (ref. Lower calorific value - Hi) Qmin (3) kW Qmax (3) kW 34.85 65.0 99.9 82.0 99.9 99.9 99.9 Maximum heat input (ref. Lower calorific value - Hi) see table of "Gas-type parameters” here...
Page 54 Condensing air handling unit Parameters of CPU-SMART PCB version 7.03.xx PARAMETER DESCRIPTION AH034 AH065 AH105 AH160 AH210 AH320 AH420 0, 1=not used; 2=blower modulation proportional to FAN (do not change); 3=blower modulation proportional to B1 input (0-10V); H16 (3) 4 proportional to B2 input for pressure check in pressure static structures; 5= proportional NTC1 for checking Queen/Fan heaters (only output Y2) 0=PWM (Y1) or 0/10V (Y2) output according to "direct" logic; 1=PWM (Y1) or 0/10V (Y2) output according to "reverse" logic;...
Page 55 Condensing air handling unit Parameters of CPU-SMART PCB version 7.03.xx PARAMETER DESCRIPTION AH034 AH065 AH105 AH160 AH210 AH320 AH420 PRESSURE control - PID parameters for ventilation of Manostatic structures - NOT USED Proportional Gain Integral Gain Derivative Gain Maximum limit of integral part Hydraulic circuit WATER FLOW control - NOT USED Flow sensor B3 output enabling: 0=disabled 1=enabled as ON/OFF input without F85 fault autoreset...
Page 56: Analysis Of Lockouts- Faults
Condensing air handling unit 7.5. Analysis of lockouts- faults The CPU-SMART manages two types of lockouts: preventive, it warns the customer that the AH air handling unit requires maintenance; • operational, it stops the AH air handling unit for safety reasons or to ensure its correct operation. • Some operational faults require manual reset; others reset themselves when the problem that caused them is solved. Below is a complete list of faults, possible causes and possible solutions. FAULT DESCRIPTION CAUSE UNLOCKING Lockout caused by Flame - Caused by the flame monitoring equipment (TER) Failure to ignite flame after 4 attempts • No gas performed by the equipment. • Live and neutral reversed Untimely flame (detection when for • Earth wire not connected Manual reset the flame monitoring equipment there •...
Page 57 Condensing air handling unit FAULT DESCRIPTION CAUSE UNLOCKING Probe NTC1 error, air intake temper- No signal from probe or broken probe ature Auto-reset Probe NTC3 error, flue gas temperature Over-temperature The temperature of the air intake probe • Check the TH1 parameter - air intake set point. Auto-reset NTC1>TH1 • Cooling fan(s) inoperative when Air flow rate insufficient (NOT used) •...
Page 58: Country Table - Gas Category
Condensing air handling unit 7.6. Country Table - Gas Category Country Category Pressure Pressure AT, CH II2H3B/P 20 mbar G30/G31 50 mbar I2E(S)B, I3P G20/G25 20/25 mbar 37 mbar BE <70kW I2E(R)B, I3P G20/G25 20/25 mbar 37 mbar BE >70kW II2ELL3B/P G20/G25 20 mbar G30/G31 50 mbar DK, FI, GR, SE, NO, IT, CZ, EE, LT, SI, II2H3B/P 20 mbar G30/G31 30 mbar AL, MK, BG, RO,...
Page 59: Gas Settings Table
Condensing air handling unit 7.7. Gas Settings Table 7.12. Conversion to gas G2.350 For further information, refer to the PCH module manual supplied inside the AH unit. NOTE: (for all multiple models) For AH160 gas consumption and mass flow rates are twice the PCH080. 7.13.
Page 60: Replacing The Modulation Pcb
Condensing air handling unit 7.14. Replacing the modulation PCB 7.15. Replacing the wiring card If the CPU-SMART PCB has to be replaced, it is necessary to If the wiring card G13900 is to be replaced, it is required to carry check and, if required, modify the setting of some parameters out a few checks and set switches. In every AH unit there is a through the Smart Web or LCD control. wiring card with different switch settings depending on whether Each AH air handling unit is configured with factory-set default the unit consists of one or more modules. values, indicated in Paragraph 7.4 “Modulation PCB Parameters”.
Page 61 Condensing air handling unit MAINTENANCE 1) Inspection of electrodes Dismantle the complete pilot flame and use a jet of compressed air To keep the AHU efficient and guarantee a long lifetime of the to clean the mesh and nozzle. Check the integrity of the ceramic same, it is mandatory to run some inspections at regular intervals: and use sandpaper to remove any oxidation on the metal parts of the electrodes. Check the correct position of the electrodes (see drawing below). It is important that the detection electrode 1) check the status of start-up and detection electrodes and pilot flame;...
Page 62 Condensing air handling unit 5) Inspection and cleaning of the water trap 9) Inspection of the ionization current Clean the trap every year, and check the connections. Make This procedure can be done directly from the LCD display by entering into the I/O menu. The IOn parameter indicates the sure there are no traces of metallic residue. If metallic residue has formed, increase the number of inspections. value of the ionization current, and the reading is as follows: 100, i ndicates that the value is more than 2 microAmperes, Remove the cover retaining screws and clean the internal part •...
Page 63 Condensing air handling unit 9.3. Other spare parts available NTC probe Supply G13820 Round gasket Microthermostat red silicone G13840 HG0300.00_IM 018 G27194 Exhaust casting G27816 Flue gas drainage casting G27815 Type "B" terminal G28814 STB thermostat G16300 Door closure (For AH105) X04511-28 (For other models) X04511 Condensate drain pipe (For all models) G27576...
Page 64 Detection electrode G27806 gasket G28826 HG0300.00_IM 019 Gasket Condensate trap G28827 Rhosili Road, Brackmills, Northampton NN4 7LZ (a division of Johnson & Starley Ltd) Tel: 01604 707022 Sales 01604 707023 Service Fax: 01604 706467 Web: www.dravo.co.uk Email: sales@dravo.co.uk / service@dravo.co.uk...

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